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Wärtsilä Scrubber Product Guide

1. 1 2 INTRODUCTIONN 2 2 2 PE IMI NNN 2 2 2 EE 2 2 3 SCRUBBER CONFIGURATIONS 0202 0 02 0 a r a 2 2 3 1 MAIN STREAM SYSTEM a Susan ka EN aa aaa aa a ioca vag ag aD S ENEE NNN ENNEN NENNEN ANA C E Ds d x pn d xe vr pa a d KANNAN ANNA NNN a 2 2 3 2 INTEGRATED SYSTEM EE 3 24252 SINGEE WITREN TUR eM DRM da 3 2 3 4 CIE Ban ERZIELT Op CN A 2 4 EE A 2 5 COMBUSTION BC TR RE A 2 6 DIMENSIONING OF SCRUBBERS FOR A SPECIFIC GAS 2 2 4 2 2 2 2 2 0 0 000000000 005 0 0 5 5 RULES AND REGULATIONS 6 EN ER AE aroa 6 Se FRE summat 6 32 REGULATION Ss sssusa 6 322 MARPOL DOCUMENTS suistui kussa LL L T 7 S E 8 3 4 US EPA VESSEL GENERAL PERMIT Mob 8 I TION
2. 15 GENERAL E ua E 15 4 7 2 HYBRID SCRUBBER SYSTEM EEN 28 AG INSULATION EEN 28 5 EXHAUST GAS SYSTEM eire EF L u u uuu Tn aaa ANDA 29 SI GENERAL ME MEME MEUM E ME 29 0 MAINSIREAM SYSTEM w halen lost bein 29 5 1 2 TN IEGRPATEDISYSIEM ENEE 29 5 1 3 EXHAUST GAS BACK PRESSURE 1 12 a r ar aa aaa a aaa aaa a aaa ara 29 5 1 4 NOISE ATTENUATION oa Eu EE Ead euo data asa Ra vans v obama Fes ed au et aaa Ua 29 5 2 SINGLE INLET SYSTEM EE 29 5 3 MULTI INLET KC RER 30 53 1 EXHAUST GAS uu det a a aa EE 30 5 4 BYPASS DAMDPER n a n a 32 5 4 1 BYPASS DAMPER 32 5 4 2 BYPASS DAMPER CONTROL AND MONITORI NG
3. n 67 13 4 1 ELECTRICAL AND AUTOMATION PANELS W RTSIL dE 67 13 4 2 ELECTRICAL AND AUTOMATION PANELS SUB SUPPLIER 70 KSC Lon 71 PAA O 71 1525 22142118 WEEN 72 13 5 1 OPERATOR SCREEN quaa E Qeon adus a a aa vi L Va XX Yu v d Ye x Ks d M 72 13 5 2 DATA EOS GER saatiin u uuu a 73 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide 13 5 3 S RS EAI ENE O TE 73 13 6 OPERATOR STATION EE 73 13 7 FALLBACK STATE BEHAVIOR IN THE EVENT OF A NETWORK FAULT 74 13 7 1 DiSTRIBUTED TO SIB CIA er A ba EE 74 13 7 2 MOTOR STARTERATESYST LTM R _ aa buds de 74 13 7 3 MOTOR STARTER VSD CAETIVAR pou used ose 74 13 8 EMERGENCY STOP AND SAFETY SHUTDOWN a aa aan eaa aa aa aa sertis saga rers s 75 13 8 1 EMERPOENGY SIQPu u u u u uu E a tunu A a 2 75 13 8 2 SAFE
4. 0 0000 aaa a aa aaa ar sarasa ese 34 5 4 3 BYPASS DAMPER SEALING AIR SYSTEM 35 5 4 4 BYPASS DAMPER OUTDOOR INSTALLATION 35 5 5 PLUME ENEE e EE Ae 36 5 6 EXHAUST GAS elc EES 36 5 7 INTERCONNECTING OF EXHAUST GAS PIPES ee nenen EELEE AE EE EEP EAEE EELEE EEEE Ennen eneee ene 37 SCRUBBING WATER SYSTEMS 38 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide 7 SEA WATER COOLING SYSTEM CLOSED LOOP 39 8 MAKE UP WATER SYSTEM CLOSED LOQOP 40 L NCC 40 OSAT u 40 9 2 UVS PIETER u 40 9 BLEED OFF EFFLUENT AND SLUDGE SYSTEM CLOSED LOOQOP 41 u 41 9 2 DAF BLEED OFF TREATMENT 2 2 0 5 2 01 aea aan aa anna aa aan a
5. 200 E A KAN N gt Servioe Area N 800 Service Area J 1000 ERN i Figure 15 Triple Entry Scrubber Page 22 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Ouadruple Entry Scrubber Hw NB Figure 16 Ouadruple Entry Scrubber Table 5 EGC unit dimensions 4 inlets Page 23 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Exhaust Gas Mass Flow kg s 7 1290 1720 23 65 3225 B Overalllength mm 77 2530 3750 4235 500 D nietheight mm 7 5425 6275 7730 8335 ws ss Difference between bottom ee and mm S Distance between support mm 1040 1520 1545 1458 mo Dryweight tonnes 1411 59 77 10 Wet weight 86 87 MJ V4 Water weight tonnes 13 28 4 64 1000 Figure 17 Ouadruple Entry Scrubber Scrubber Deplume Dimensions Table 6 Scrubber deplume standard dimensions Page 24 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA
6. except caustic soda piping which is Class Fire endurance requirements With the exception of the exhaust gas bypass line exhaust gas cleaning system ancillary pipes are not essential for the operation of a diesel engine There are therefore no fire endurance requirements for pipes located in e Machinery spaces of category A engine rooms engine casings e Other machinery spaces e Cofferdams void spaces pipe tunnels or ducts Page 14 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide e On open decks Flame spread characteristics All pipes except those fitted on open decks and within tanks cofferdams pipe tunnels and ducts shall have low surface flame spread characteristics not exceeding average values listed in IMO Resolution A 653 16 Surface flame spread characteristics may be determined using the test procedures given in ASTM D3806 UV resistance For systems exposed to sunlight on open decks the material has to be UV resistant or otherwise protected against UV radiation This does not apply to insulated or otherwise enclosed pipes Heat distortion Heat distortion temperature is determined according to ISO 75 method A or equivalent Pressure requirements All pipe work is to be rated for at least the designed working pressure In particular GRE pipe work passing through ba
7. gt 8 1 42 i ye K AE E oy 3 lt s i am Figure 26 Bleed off treatment unit in one piece Page 42 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Figure 27 Bleed off treatment unit with separated chemical modules Figure 28 Bleed off treatment unit recommended service space 9 2 5 Technical data BOTU Technical data Type SWT 3500 Capacity 3 5m h Dry weight 880 kg Weight in operation 2450 kg Total water volume 1 57 m Length 2700 mm Page 43 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide Width 1100 mm Height 1930 mm Installed electric power 5 kW Consumed power 3 kW Voltage 3 x 380 480 VAC Fuse 16 A Frequency 50 60 Hz The location of the treatment unit s onboard the ship is project specific The unit could be inside the engine room funnel extension scrubber tower or in the specific equipment container In case the unit is located above ship s rolling centre vertical location should be as low as possible to minimize transverse accelerations The chemicals used in the unit are taken from small chemical tanks built on the unit The alkali built on tank can be filled by pumping alkali from the scrubber alkali tank by t
8. W rtsil Scrubber Product Guide A NBpip 400 600 850 1000 1100 1400 1500 B NBpipe 400 600 800 1000 1100 1300 1500 C NBpipp 250 2350 500 600 700 80 900 D NBpip 600 900 1200 1400 1600 1900 2100 9 E 125 35 50 5 65 80 H 276 325 400 50 600 70 800 _ Weight kg 180 310 470 610 760 90 110 200 Figure 18 Deplume mixing unit dimensions Page 25 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Residence tank dimensions Manhole 600x400 with ladder Figure 19 Residence tank dimensions Table 7 Residence tank dimensions per gas flow Ve Heg Log KD Page 26 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide Scrubber Hydrocyclone dimensions Table 8 Hydrocyclone max washwater flow amount per gas flow Max flow per unit m h Number of units 28 1 20 li 430 2 20 LI 860 4 2 li 120 6 1 uz 8 39 1 _ me 1 _ 325 6 sm 1 _ sm s 60 2 _ lI N Service lift 80 mm to clear inter
9. 8860 9400 9800 10360 10750 11100 11400 D nletheight 6400 6900 7400 7900 8350 8800 9200 9600 10000 10350 10700 70 1350 100 2200 2 3000 Drain nominal bore 550 600 1000 Page 19 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Figure 13 Double Entry scrubber Page 20 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Triple Entry Scrubber 7 N Figure 14 Triple Entry Scrubber Table 4 EGC unit dimensions 3 inlets Page 21 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Exhaust Gas Mass Flow kg s 860 1290 1720 2365 3225 B OverallLength mm 500 3975 4915 5780 6700 Bi Overall width mm 2600 3140 3860 4500 5250 mm mm mm UJ Difference between bottom and inlet mm 0 0 0 0 0 2 Inletnominalbore mm 140 600 750 900 1000 1 Dry weight tonnes 28 43 60 76 110 Wwetweight tonnes 38 56 87 117 174 MWMateweght ones 10 13 28 41 ZZ
10. Modular distributed I O system Up to 32 modules for each network connection Dual Ethernet ports supporting redundant network No programming needed all done in the PLC Page 71 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 5 Network switch The network switches that are being used are an Industrial Ethernet Managed Switch Ethernet TCP IP managed switch Schneider Electric TCSESM063F2CU1 The network switch has the following characteristics Interface 2 Fibre optic and 6 copper connections Supports dual redundant Ethernet networks Ring Redundant power supply Ring coupling Rings supporting MRP Media Redundancy Protocol Fast HIPER Ring and RSTP Alarm function Power supply fault Data link status and High temperature Fully configurable With a managed switch it is possible to configure or control the parameters of the device manage them and to get access to its internal information Redundancy network By implementing a ring architecture or a coupled ring will provide protection against losses of network segments The ring is constructed using the HIPER Ring ports If a section of the line fails a ring structure of up to 50 switches transforms back to a line type configuration within 0 2 seconds Redundancy power supply The network switches will be provided with redundant
11. W RTSIL W RTSIL SCRUBBER PRODUCT GUIDE June 2014 REVSIONHISTORK 1 A 993 Carn ven 200913 77 1 Majorrevision E NENNEN THIS PUBLICATION IS DESIGNED TO PROVIDE AS ACCURATE AND AUTHORITATIVE INFORMATION REGARDING THE SUBJECTS COVERED AS WAS AVAILABLE AT THE TIME OF WRITING HOWEVER THE PUBLICATION DEALS WITH COMPLICATED TECHNICAL MATTERS AND THE DESIGN OF THE SUBJECT AND PRODUCTS IS SUBJECT TO REGULAR IMPROVEMENTS MODIFICATIONS AND CHANGES CONSEQUENTLY THE PUBLISHER AND COPYRIGHT OWNER OF THIS PUBLICATION CANNOT TAKE ANY RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR OMISSIONS IN THIS PUBLICATION OR FOR DISCREPANCIES ARISING FROM THE FEATURES OF ANY ACTUAL ITEM IN THE RESPECTIVE PRODUCT BEING DIFFERENT FROM THOSE SHOWN IN THIS PUBLICATION THE PUBLISHER AND COPYRIGHT OWNER SHALL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR ANY CONSEOUENTIAL SPECIAL CONTINGENT OR INCIDENTAL DAMAGES OR INJURY FINANCIAL OR OTHERWISE SUFFERED BY ANY PART ARISING OUT OF CONNECTED WITH OR RESULTING FROM THE USE OF THIS PUBLICATION OR THE INFORMATION CONTAINED THEREIN COPYRIGHT O 2014 BY W RTSIL MOSS AS ALL RIGHTS RESERVED NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER ALL RIGHTS RESERVED W rtsil Scrubber Product Guide Table of Contents 1 NOMENCLATURE amp ABBREVIATIONS
12. Open loop scrubbing Scrubbing principle based on sea water without recirculation Packed Bed Layer of material installed in the scrubber to increase the liquid to gas contact surface Particulate Matter PM This derives from the combustion process in the engine or boiler and is the by product from incomplete combustion and comprises unburned fuel and ash in either solid or liquid droplet form Pre Conditioning Water Water used to pre condition the bleed off prior to entry into the BOTU Process Tank Water from some types of EGC units scrubbers running in a closed loop mode or in some scrubber types in the hybrid mode flows into the process tank by gravity and is pumped back to the scrubber Process tank can be a part of pumping module Reaction Water Water used to increase the pH of the wash water of an open loop scrubber Reaction Water Pump Pump supplying sea water to be mixed with the wash water of an open loop scrubber Residence Tank Tank to which wash water from the EGC unit scrubber is led by gravity for wetting of particles and de aeration which in turn leads to more efficient water cleaning in the water treatment plant Typically this tank is used in sea water open loop systems Page 85 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Scrubber The unit for washing SO and PM from
13. Tanks should also be provided with low suction for complete draining prior to maintenance Diameter is according to installation specific system diagram Each connection below the maximum surface level should be provided with safety quick closing valves Alkali tank filling line should be led below the minimum service level and should be provided with vacuum breaker provision hole anti syphon at the upper end where siphon effect may occur Piping should be sloped downwards without pockets Filling line is typically DN 80 and provided with DIN 2633 flange at bunker station Filling pipe material recommendation is AISI 316L or black steel DIN 2448 Transport trucks are provided with several different connection types depending on supplier and country Adapters may be required After bunkering the transport truck s delivery hose and the filling line are to be cleaned with compressed air Also the tanks in the truck are to be cleaned with water Therefore compressed air and water connections should be located near to bunkering stations Caustic soda storage tank should be provided with the following alarms e Temperature high set point 45 C if provided with heating e Temperature low set point 20 C if relevant e Level low e g 30 e Level high e g 85 Caustic soda storage tank should be provided with the following indications e Local level gauge hydrostatic type with sensor isolating valve Sight glasses are not recommended e Local
14. but it can also be arranged that for one large engine exhaust it is divided into two venturis no other combustion unit connected making it a mainstream scrubber The multi inlet arrangement is a practical way of saving space for the EGC units 5 3 1 Exhaust gas fan The freguency controlled exhaust gas fan is used to compensate the EGC system back pressure and to prevent back flow to standing combustion units in integrated systems Typically the fan is not reguired in main stream systems but this should be always verified to avoid too high back pressure for the combustion unit The fan speed is controlled based upon the pressure difference measurement over the by pass flap in the damper or the pressure level at inlet side of the scrubber depending on the bypass damper arrangement For each installation the most feasible fan configuration will be selected taking into consideration reliability Issues redundancy safety space limitations noise and simplicity The fan module including the fan foundation with vibration isolators electric drive motor starter bearings and the fan is typically designed for mounting adjacent to the top of the scrubber unit The fan materials are selected according to the temperature and gas conditions after the scrubber Normal operating temperatures for the fan are from 30 to 60 maximum 100 C in case the system is provided with deplume system Typically the exhaust gas is saturated RH100 when the
15. to not exceed the 100m limit of the copper Cat 5e Ethernet ring The number of Ethernet rings may vary depending on how the eguipment will be arranged on the ship Ethernet rings can be arranged as shown in figure below Redundant Fiber optical ring 100 MBit ENS ENGINE ROOM FNS FUNNEL Redundant Ethernet Ring Redundant Ethernet Ring Cat 5 Cat 5 100 MBit 100 MBit Eq2 EN EgN Figure 41 Communication Page 65 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 3 2 Redundant Power Supply The Main Control Panel MCP is provided with redundant 220VAC power from ship power distribution system The 220VAC power supplies are connected independent to different 220VAC 24VDC power supplies Equipment such as Ethernet switches remote I O starter and internal components in MCP which require 24VDC will be provided with redundant 24VDC power supply from MCP If a fault occurs one of the power supplies an alarm is generated Redundant 24VDC power supply is arranged as shown in the diagram below Redundant 220VAC power from ship power distribution system 220VAC 24VDC posu supply Internal Components in MCP Diode Redundancy Module Redundant 24VDC power supply Remote 1 0 Ethernet switch Starters Figure 42 Redund
16. 8501 1 The surface must be dry and least 4 weeks old The relative humidity of the concrete should not exceed 80 The surface temperature should remain at least 3 above the dew point The temperature of the ambient air surface or paint should not fall below 10 Drying times Dust dry after 3 hours Touch dry after 4 hours Fully cured after 7 days Teknosolv 6560 Primer 280 Finish Teknos Inerta 280 Table 16 Example products for tank coating from Tikkurila Coating for buffer and alkali tanks Product 77 Tikkurila TEMALINE BL 5 Description Two component solvent free epoxy coating Suitable to be used as a heavy duty coating on steel and concrete surfaces exposed to chemical and mechanical stress in immersion Good resistance to acids alkali and salts in immersion Suitable for coating of lead free tanks Withstands 150 dry heat and 60 in immersion Page 52 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Specific gravity 1 4 kg l mixed Film thicknesses 500um Sa2 ISO 8501 1 All surfaces must be dry The temperature of the ambient air surface or paint should not fall below 10 during application and drying Relative humidity should not exceed 80 The surface temperature of the steel should remai
17. Baltic Sea or Great Lakes in the North America additional sea water or the addition of alkali solutions sodium hydroxide may be used to assist in neutralization raising the pH of the scrubbing sea water Refer to section 5 for Alkali Handling requirements and systems 11 3 Sea water flow This system comprises standard high discharge head sea water pumps for scrubber water supply normally arranged so that the total capacity of the scrubbing water required typically 45m MWh for a fuel containing up to 3 5 m m Sulphur is provided by pumps of 50 capacity plus one stand by of the same capacity to provide system redundancy Page 58 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 12 Wash Water and Sludge System 12 1 Wash Water System This system relies upon the use of hydrocyclones to clean wash water from the scrubber In order to provide the necessary differential pressure across the hydrocyclones and in some cases to aid over board discharge wash water pumps are provided These pumps have internal components manufactured in Super Duplex or similar material in order to withstand the corrosion effects of the low pH washwater returning from the scrubbing process As in the case of the supply pumps wash water pumps are provided with redundancy The pipe work for both supply and wash water is recommen
18. EIT EE 22 Quadruple Entry nsns nnn 23 Quadruple Enty SOIr bD8Uuuuu l 24 mixing unit dimensions 1 1 11 1 ar nnn nnn nennen nnne nne nana adea sonas 25 Residence tank dimensions coorta mina px nau Tuae ae Eno ur uan aur acera abs ua Eres e Da A Seed 26 Flydrocycione e UE 27 Exhaust gas T n Bell Ee Elei Ee EC ne BEE 31 Example of exhaust gas fan pressure in double fan configuration 32 Bypass damper with 60 angle to 33 Bypass damper with 90 angle to 34 Weather cover to be used in outdoor installations 35 Bleed off treatment unit in one 8 42 Bleed off treatment unit with separated chemical modules nnn0nnnnnannnnnnennnnornnsnnnrrnnnnnrrnnnrrrrnrnsnenenne 43 Bleed off treatment unit recommended service 43 de ege EI e EE 45 Separator service space requirements a a ar aras asssrsrrrsssssrsssssiaasssa 46 Centrifugal Separator 47 ROSE ICS ANK 60 ewe 50 49 S
19. Page 15 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 4 The standard scrubber dimensioning is based on diesel engine exhaust gas flow in ISO 3046 conditions and nominal scrubber pressure drop of 1500 150mmWG This data is indicative and subject to diesel engine specific exhaust gas data pressure drop limitations maximum fuel Sulphur content of 3 50 and cooling system specification Closed Loop and Hybrid systems only Single entry open loop system Figure 10 Single entry scrubber Page 16 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Table 1 EGC unit dimensions 1 inlet MW MW W W MW MW MW Exhaust Gas Mass Flow kgs 245 430 860 12 90 17 20 23 65 32 25 BL Overall Length mm 7 1730 2240 3295 3850 4660 5360 6250 D nletheight mm 7 4670 5200 7015 8495 9635 10665 12130 GR 7 7 71 2 Bei Erg EE L Distance m mu M NRI IX BR 3E RU IR BR NEEDLE NE EE E 60 N2 Otutletnominalbore mm 7 400 600 850 1000 1100 1300 1600 Dm weight 12 20 28 41 59 74 104 Wet weight tonnes 15 27 37 54 86 115 16 9 Waterlev
20. REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide The system can be eguipped with parallel installation of two fans in cases when the gas flow is too large for one fan or when higher system redundancy is desired When double fan configuration is selected the system can be specified with a possibility to operate also with only one fan This kind of system can typically achieve 60 65 of the maximum gas flow with only one fan running as indicated in the fan curve To enable one fan running mode in two fan configuration the fans have to be provided with shut off dampers to prevent the fresh air leakage through the fan that is not operating The shut off dampers should be installed at the fan inlet to enable the possibility for fan maintenance while continuing the operation with the other fan L Two Fans Single Fan System curve S o A 2 A LL I I I I I I I 1 I 1 I 0 50 65 100 Gas flow Figure 22 Example of exhaust gas fan pressure in double fan configuration 5 4 Bypass damper 5 4 1 Bypass damper design Each exhaust gas pipe is eguipped with a 3 way bypass damper enabling the exhaust gas to be led directly to atmosphere in case the scrubber is not in use Bypass dampers are available in two different outlet angles to scrubber 60 and
21. content and engine fuel consumption The density is measured with density sensors 9 2 2 Buffer tank The aeration of the bleed off is done in the buffer tank to increase the oxygen content in the bleed off Aeration blowers feed air to diffusers at the bottom of the tank It is necessary that the buffer tank is dimensioned big enough for allowing enough residence time for the aeration system to oxidize the sulphites to sulphates The buffer tank is equipped with a level sensor Usually two air blowers are installed One blower is running continuously and the other blower is in stand by The operator can locally manually choose which blower is running and which is in stand by The pressure in the supply line to the aeration tank is measured with a pressure sensor If the pressure is too low an alarm is given In case of sensor failure alarm is given 9 2 3 Bleed off recirculation pump Bleed off recirculation pump is continuously running when the level in the buffer tank is above the lowest limit The bleed off is circulated from the buffer tank for mixing of NaOH in order to maintain the desired pH level in the tank The return line is taken before the pre conditioning water if needed is mixed with the bleed off and the mixture fed to the BOTU units Page 41 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Gu
22. deplume system Is not in operation The exhaust gas flow in the dimension table represents the maximum total flow in ISO 3046 conditions The nominal temperature for the exhaust gas is 40 45 after the scrubber The stated motor power is typical for the fan in a well designed exhaust gas pipe layout It is possible that bigger motor has to be used depending on the system layout Page 30 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide B O l 100 ES 600 LIL I i Figure 21 Exhaust gas fan dimensional drawing Table 10 Exhaust gas fan dimensions Type Capacity Motor A B H N OD L1 L2 L3 L W Weight kg s kW mm mm mm mm mm mm mm mm mm mm 25 3 500 1060 800 34 5 560 1160 910 42 5 630 1170 1000 36 710 1270 1120 54 800 1480 1250 90 900 1580 1400 108 1000 1780 1600 132 1120 2080 1800 192 1250 2280 1800 240 1400 2480 1800 240 1500 2680 1800 250 1600 4130 1800 315 1800 4280 2000 450 2000 5030 2200 Page 31 NO PART OF THIS PUBLICATION MAY BE
23. exhaust gas stream with scrubbing water EGC Unit in IMO documents Scrubbing Extraction of SO and PM from the exhaust gas using sea water with or without the addition of Sodium Hydroxide Open Closed loop Scrubbing Water General term for the water used in the process of removing Sulphur oxides and PM from the exhaust gas Scrubbing Water Monitoring Module Module provided for monitoring the guality of scrubbing water to the EGC system in open loop systems Scrubbing Water Pump Pump that provides sea water for open loop sea water hybrid circulation and circulation of process water in closed loop Separator Eguipment with rotating bowl for water treatment by centrifugal force Settling Water separation technigue in which impurities in water are separated by gravity Sludge Sludge contains the impurities such as oil particulate matter separated from the wash water or bleed off Sodium Hydroxide Caustic soda Lye Chemical formula NaOH A chemical that is used to absorb SO Commercially available as water solution and granulates See alkali Venturi Exhaust gas inlet section to the EGC unit scrubber for pre treatment of the exhaust gas before passing into the main body of the EGC unit Washwater Water in open loop systems is the water exiting the scrubber and discharged overboard following water treatment Washwater Monitoring Module Module provided for monitoring the guality of washwater before discharge back to the sea in
24. flow can be calculated with the info of installed dampers It is beneficial to use warm sealing air cold outdoor air is not allowed Table 13 Sealing air flow Sealing air flow for different damper sizes kg s DN500 DN630 DN700 DN800 DN900 DN1000 DN1200 DN1400 DN1600 No EG fan in system 0 32 0 41 0 45 0 52 0 59 0 65 0 78 0 91 1 04 System with EG fan 0 19 0 24 0 27 0 31 0 35 0 38 0 46 0 54 0 62 5 4 4 Bypass damper outdoor installation The bypass damper should be installed inside casings In case the bypass damper has to be located externally which is not desirable a special protective weather cover should be used As the damper operation is essential for ship safety the damper actuator and other equipment have to be properly covered against ice and snow An example sketch of the cover is shown in figure below service hatch with exhaust air grid Aluminum cover box f i 3 11 N n lt funnel top mt AI box bolted to funnel top Figure 25 Weather cover to be used in outdoor installations Page 35 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 5 5 Plume enclosure If no dedicated deplume system is assembled in the system the engine room ventilation exhaust air from the engine casing can be conducted to an open
25. nn 41 90 2 1 41 922 BUFFER TANK uuu uuu ap 41 9 2 3 BEEED OFPF RECIRCULATION PUMP EE EE EE 41 9 2 4 PRE CONDITIONING WATER nea nana taan v n valaan aa a aa alana a Naa Na aeo aa a op anda RNA oae U Dads 42 SEP SUO 018 MB UP TETTE 43 CENTRIFUGAL SEPARATOR BLEED OFF TREATMENT UNITA 44 9 4 HOLDING TANKI 47 9 5 BLEED OFF 4j Oe 47 DUB E EEN 48 10 ALKALI SYSTEM CLOSED LOOPR 49 Ee gn D D EE 49 WZ CON UMPON uu 2 x 50 LO SID PGP u u 50 TAN ees WR CREME 52 10 5 STORAGE TANK HEATING uuu uuu ull pace uu 53 10 6 STORAGE TANK FITTINGS AND INSTRUMENTS a n nn naa a 54 10 7 ALKALI FEED MODULE EE Ee 55 10 8 ALKALI TRANSFER PUMP u ieee eaten cbse 56 10 9 ALKALI SPEOIEICATION eaa aa aa aa a annua au PPS aa Aaa a aan see u a aan eaa aa a n
26. on board Page 60 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide Wei JS SERVICE HEIGHT 7 YARD SUPPLY YARD STRAP TO DECK YARD SUPPLY GENERAL NOTES OVERALL DIMENSIONS L 1200mm W 800mm 1200 TANK DIMENSIONS L 1l50mm W 750mm H 800mm TANK VOLUME 690litre DRY WEIGHT APPROX 60kg N Thea dringt imd Phe hag dg ci mennen milla Jopa 19 biberi The a rertenrbie ter Peary ISSUED FOR APPROVAL I cane s m AM Hammworthy Moss AS GENERAL ASSEMBLY DRAWING F SLUDGE TANK 131360 142 0703 100 aH ue 10 603 TK 604A TK 604B Figure 39 Sludge tank Page 61 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide 13 Automation 13 1 Definitions List of definitions in alphabetical order with complete meaning and description DOL Direct On Line Starter type ECR Engine control room ER Engine room FC Funnel casing GPS Global Positioning System HMI Human Machine Interface IAS Integrated Automati
27. open loop systems Washwater Pump Pumps provided to ensure reguired differential pressure of the wash water across hydrocyclone unit for efficient operation Water Treatment Plant Generic term for the processes provided for cleaning the scrubbing water comprising Hydrocyclones for open loop sea water systems Centrifugal separators for sea water hybrid closed loop systems BOTU for sea water closed loop systems Flocculation system Page 86 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA
28. outgoing circulating water Mean heat transfer coefficient from water coils to caustic soda can be estimated to 60 W m x if turbulent flow conditions can be achieved An alternative heating method will be to provide a separate caustic soda circulation through an external heat exchanger Thus the heating media can be low pressure steam or high temp heat recovery water In these cases the appropriate heat exchanger material should be selected for example nickel If heat losses are moderate also external electric heating can be used Heating elements are adhesive and attached directly to the tank wall under the insulation Also in these cases the specified heating elements should not exceed maximum surface temperature and be thermostatically protected Page 53 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 10 6 Storage tank fittings and instruments When anywhere in the alkali system bunkering transfer and feed the lines are to be located below the alkali storage tank level the storage tank should be eguipped with a guick closing valve The guick closing valve is either connected to the emergency stop or has an own lever If guick closing valve activation is based on a lever the release system should be hydraulic The primary suction should be located approximately 100mm from storage tank bottom
29. power supply from the Main Control Panel MCP which in turn gets redundant supplies from the ship s power distribution system 13 5 1 Operator screen The Operator screens are 15 graphical touch screen with colour Description te Producttype ProductiD Shneider Electric Magelis XBTGT XBTGT7340 The Touch screen has the following characteristics 15 graphical touch screens TFT Display supporting 65000 colours Variable link with PLC Web gate and data sharing Page 72 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 5 2 Data logger The Datalogger that is being used is as follows Description Make Producttype Product ID The Datalogger has the following characteristics Tamper proof data logger Ethernet connection FTP server Update database on LAN CF card data storage Log 120 variables in 12 groups 13 5 3 Starters Freguency converters VSD Altivar 61 VSD The Freguency converters have the following characteristics e 200 to 690V e Monitor values like Temp Speed Power and Voltage e Dual Ethernet ports supporting redundant communication Direct on line starters DOL Tesys DOL starts are provided for the pumps and most of the fans Control of this Equipment is provided by a Schneider Tesys T which communicates over Modbus TCP The Tes
30. 00 DN900 DN1000 DN1100 DN1200 DN1300 DN1400 DN1500 DN1600 DN1700 DN1800 5 4 2 Bypass damper control and monitoring The bypass dampers are automatically controlled by the automation system which will open the bypass if triggered by the safety functions The damper actuator is fail safe type so that in case of lost signal or pressure on the actuator the bypass line opens by a spring or similar positive means not reguiring external energy Page 34 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide The flap positions are detected by position switches The flap position will enable disable the pressure difference based exhaust gas fan control from the individual damper All inputs for the damper operation including the pressure measurement and the position switch signals are connected to the connection cabinet attached to the damper shell 5 4 3 Bypass damper sealing air system In order to secure the damper tightness two different methods are available sealing air system and pressure control system The sealing air system is based on the clean air supply in between two flaps Both bypass line and scrubber line are eguipped with double flaps that form the pressurized sealing air chambers Typical needed air flows are listed in table below for different damper sizes Total sealing air
31. 44 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Figure 29 Centrifugal Separator Page 45 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide LIFTING CAPACITY OF HOIST 250kg 922 455 ap HE ENSE IE XR D KNN KN H L RER Let C A HA JOKKE H VU SC eeeeeeeeeeeeeeeeeee EE m ia Ee m P 5 55 5052566 GEN z Trommel kann ber LII TTT HH a TRANSPORTED OVER ADJACENT SEPARATORS OF THE SAME TYPE bree rink CENTRE Of GRAVITY Z e x M LN k Ze wie eeh KEE N Pat t OX bat A www ve wx E aa Nee SS m Li Xx x X x X N J E l s P psr E Figure 30 Separator service space requirements Page 46 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Figure 31 Centrifu
32. 90 The dimensional drawing for each pipe size can be obtained in the figures in this chapter The bypass dampers have flaps and shaft inside the exhaust pipe and for this reason it generates some back pressure to the system It is recommended that when selecting damper size the velocity in the damper inlet is kept below 30 m s preferably closer to 25 m s Page 32 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide By pass damper 60 2 view from the By pass amp U Scrubber Inspection hatch 200 A Inspection PIEN hatch o EN Wy 5 LA N 1 zi dl uy From a 1 2 combustion unit L i Both outlets the by pass line and the scrubber line to N be eguipped with flexible joints The dimensioning is done according to thermal expansion on corresponding exhaust pipe layout Space requirement Service platform for dismountling the minimum width 600 mm flap module Figure 23 Bypass damper with 60 angle to scrubber Table 11 60 damper dimensions DN900 DN1000 DN1100 DN1200 DN1300
33. Classification Societies Several Classification Societies have already developed their own rules to incorporate the use of emissions abatement technology and to ensure that the use of this equipment will have no adverse effect on the safety of the ship In terms of MARPOL compliance most Classification Societies are designated as Recognised Organisations and are able to act on behalf of Flag State Administrations and are given a mandate to survey and verify emission abatement system compliance on their behalf Point worth noticing is that the rules concerning Exhaust Gas Cleaning Systems developed by different Class Societies may differ between each other Page 8 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 4 System Description 4 1 Closed loop sea water main stream system 4 1 1 Description In Closed loop scrubbing process the scrubbing water is pumped through a sea water heat exchanger to the scrubber Scrubbing water is sprayed towards the exhaust gas flow via spray nozzles inside the scrubber Scrubbing water is also sprayed to the venturi exhaust gas inlet s Scrubbing water passes through the packed bed inside the scrubber and is eventually collected and removed through the sump at the bottom The scrubbing water absorbs Sulphur oxides heat and other components from the exhaust gas stream The h
34. DN1400 DN1500 DN1600 DN1700 DN1800 The flap modules are dismountable for service and this should be taken into account in the layout design For cleaning and inspection of the flaps there is a hatch in the damper shell Additionally inspection hatches are needed in the exhaust pipe close to the flaps Page 33 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide By pass damper 90 A view from the By pass m By pass ZZ ZZ ZZ Z LAT Z ZZ ZZ Inspection hatch Scrubber 4 200 4 a Inspection hatch L1 600 From combustion unit Both outlets the by pass line and the scrubber line are to be eguipped with flexible joints The dimensioning is done according to thermal expansion on corresponding exhaust Service platform for disassembling pipe layout minimum width 600 mm the flap module N Space reguirement Figure 24 Bypass damper with 90 angle to scrubber Table 12 90 bypass damper dimensions Pipe dd L1 L2 L3 Weight size mm mm mm mm mm mm kg DN300 7 DN350 DN400 DN450 DN500 DN550 DN600 DN700 DN8
35. ED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 3 3 EU The European Union has introduced a Sulphur Directive which has great impact on the local marine traffic inside EU SECAs This directive is mostly following the IMO MARPOL Annex VI with a few additional reguirements Summary of the EU Sulphur directive applicable to ships of all flags e All ships in SOx ECA o 1 00 until 31 12 2014 o 0 10 from 1 1 2015 e All ships outside SOx ECA o 3 50 from 1 1 2012 o 0 50 from 1 1 2020 e Passenger vessels operating on regular services to or from EU port o 1 5 until 1 1 2020 e Ships at berth in EU o 0 1 from 1 1 2010 3 4 US EPA Vessel General Permit VGP From December 19th 2013 commercial ships operating closer than 3 miles from US coast line must obtain coverage under Vessel General Permit in order to be allowed to discharge into the sea The allowed discharge limits are similar to the IMO legislations in terms of having limit values for pH PAH Turbidity Nitrates and Nitrites The discharge of washwater from the exhaust gas scrubber treatment system must have a pH of no less than 6 0 measured at the ship s overboard discharge with the exception that during maneuvering and transit the maximum difference between inlet and outlet of 2 0 pH units is allowed This difference is to be measured at the ship s inlet and overboard discharge 3 5
36. M OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 4 3 PLC The list below gives an overview of the components that are used Table 18 Components used in PLC Description Make Product ID Schneider Electric Modicon M340 BMXP342000 PLC rack 4 module Schneider Electric Modicon M340 BMXXBP0400 Power Supply Schneider Electric Modicon M340 BMXCPS2010 Ethernet nodule Schneider Electric Modicon M340 BMXNOE0100 Schneider Electric Modicon M340 BMX NOM0200 A secondary PLC will be installed this can be manually started in case of PLC malfunction This is a copy of the main PLC The components have the following characteristics Hot swappable modules Programming trough USB or Ethernet Program can be changed without PLC software Integrated web server for control and diagnostic 13 4 4 Remote I O The list below gives an overview of the components that are used Table 19 Components used in I O Description Make Producttype Product ID Network Interface Module Schneider Electric Modicon STB distributed I O solution STBNIP231 1 Power Supply Schneider Electric Modicon STB distributed I O solution STBPDT3100K 16 digital input Schneider Electric Modicon STB distributed I O solution STBDDI3725KS Schneider Electric Modicon STB distributed I O solution The components have the following characteristics
37. ORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 2 5 List of control amp monitored points The I O list is a document containing list of instrumentation components which serve as an input or output of the control system The list contains following information Instrumentation components Tag no Instrumentation components Type Description Mounting location Service description Type of signal Control System Range and set point I O number assignment rack slot channel number 13 2 6 System alarms The system alarms are divided in to various groups in order of importance In general there are 3 types of warnings actions Audible and Visual alarm Instant shutdown Cool down Normal system stop Subsystems like the Sludge system and the Alkali system can have alarms without the whole Scrubber system shutting down If the subsystems are shut down over time the rest of the Scrubber system may also shut down due to e g a low pH alarm The alarms from the Scrubber system to the Ship system IAS are generally divided into two main alarm types Critical and Non critical 13 2 7 Second alarm The alarm connection is based on a potential free circuit and the Ship system will be able to detect alarms in terms of whether the circuit is open or closed In a normal situation the circuit is closed If the circuit is open there is an alarm And if a s
38. P The starter for the sealing air fan DOL or VSD see el drawings for details is also located in this panel Emergency stop is hardwired from MCP Scrubbing Water Supply Pump starter panels SWP1 2 Scrubbing water supply pump starter DOL YD or VSD supplies water to the scrubber s and vary in size and number from project to project Controlled and monitored over Modbus TCP from MCP Emergency stop is hardwired from MCP Size and layout is depending on system configuration Refer to el drawings and system specification for details Scrubbing Cooling Water Pump starter panels SWCP1 2 Scrubbing cooling water pump starter is always a VSD starter and feeds heat exchangers with cooling water Controlled and monitored over Modbus TCP from MCP Emergency stop is hardwired from MCP Size and layout is depending on system configuration Refer to el drawings and system specification for details Page 68 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Reaction Water Pump panels RWP1 2 Reaction water pump starter is a DOL YD or VSD and supplies sea water to increase pH in washwater overboard discharge in an open loop scrubber systems Controlled and monitored over Modbus TCP from MCP Emergency stop is hardwired from MCP Size and layout is depending on system c
39. RTP regulation reguirements can be fulfilled with one integrated scrubber unit For vessels with several engine casings adjacent to each other the following arrangement is proposed e Exhaust pipes from different fire zones are routed purely through their own engine casings up to the funnel avoiding exhaust gas pipe penetrations through main fire bulkheads e The funnel is above the top of the fire zones separated from the engine casing with 60 fire insulation and remote controlled fire flaps e The funnel area be common for several engine casings and the scrubber unit located in funnel e One Integrated Scrubber cleaning the exhaust gases from all exhaust pipes from the engine casings Page 37 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 6 Scrubbing Water Systems When the scrubber system is working in closed loop principle the scrubbing water is circulated several times inside the system Only small bleed off is extracted from the loop and sea water and alkali are added Flow rate of scrubbing water is related to actual dimensions of scrubber unit and total water balance When the scrubber system is working in open loop principle scrubbing water is pumped into the scrubber s and discharged back to the sea via water treatment and monitoring systems Same scrubbing water sea water is n
40. SOG LE ILE 8 4 SYSTEM DESCRIPTIONN 9 4 1 CLOSED LOOP SEA WATER MAIN STREAM SYSTEM 9 4 1 1 DESCRIPTION BEE 9 21 2 OPERAIION EE 10 4 2 CLOSED LOOP SEA WATER INTEGRATED SYSTEM 2 ser eaa anoa eaa 10 4 2 1 10 MP Ze OPERA O naa nce n desta 10 4 3 SINGLE AND MULTI INLET OPEN LOOP SEA WATER 5 65 22000 00 00 0000000001 esses ss sanas 11 4 3 1 DER PIIN 14 MC er OPERATION 12 4 4 SINGLE AND MULTI INLET HYBRID SCRUBBERS scsssccccccccccccccsssssseecceccccccccssaussseeececcccsessesuaaseseeceececceesesuuaaaens 12 M be eri EE 12 24 24 2 OPERA TKO NERONE 13 45 GAFET IIRIKSI 13 4 6 PIPING MATERIAL REQUIREMENTS 14 4 7 DIMENSIONS OF SCRUBBER UNIT DEPLUME RESIDENCE TANK AND
41. TY SHUTDOWNS u nent u tbl bli aa mt nu a nz Nas mn 76 13 8 3 22 aaa aa rr rara ara 76 159 ERC REESEN 76 13 9 1 COMMON EA RM EE 76 13 9 2 SHIP CONTROL SYSTEM LAS PMS GPS EE 76 13 10 EMERGENCY OPERATIONS a aa a aa anoa ooo PAEA a au 77 1244 REDUNDANCY en ee ee 77 14 ce H e 78 14 1 POWER DI NND needed n n ANNAN KA osaa 78 14 2 MAINTENANGE EEN 78 15 APPENDIXES EE 80 15 1 APPENDBE NAO ots et u u A 80 15 1 1 GEN RSL 80 15 1 2 ER E e KEEN 80 15 1 3 dia aan u 81 15 2 APPENDIX SCRUBBER NOMENCLATURE n n n r aaa 82 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide Table of Figures Foure SAUD Eege sete asa eg E o UTEM 2 Figure 2 Integrated SOU DDO cuo dri e coins ut eue esque 3 Figure 3 Single inlet
42. UM HYDROXIDE NaOH 20 SOLUTION TECHNICAL OUALITY TECHNICAL NAME SODIUM HYDROXIDE SOLUTION 20 WATER SOLUTION CHEMICAL FORMULA NaOH ag CAS N o 1310 73 2 EINECS N o 215 185 5 ADDITIONAL TRADE NAME S CAUSTIC SODA 20 LYE 20 CHEMICAL COMPOSITION SODIUM HYDROXIDE NaOH 17 23 weight CHLORIDE Cl lt 0 1 weight as NaCl Page 57 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 11 Scrubbing Water Systems Open Loop 11 1 General In the open loop scrubbing system sea water is used as the scrubbing medium scrubbing process relies upon the natural buffering capacity of sea water to neutralize the acidic components of the scrubbed combustion process gases The buffering capacity of the sea water is summarized in the term alkalinity which is related to salinity in fully marine waters salinity alkalinity of the sea water will affect the ability of the sea water system to neutralize the acids scrubbed from the exhaust gases Salinity in marine waters will vary depending upon the location time of year and proximity to coastal regions The use of sea water in the open closed loop systems assists in the pre conditioning of the exhaust gas to be scrubbed in lowering the gas temperature thus reducing the gas velocity The design of the Exhaust Gas Unit is such that in
43. a master controller When this period expires outputs are set to their fallback state 13 7 3 Motor Starter VSD Altivar 61 In the event of a network fault the drive reacts as Drive fault Freewheel Freewheel stop factory setting Ramp stop Stop on ramp Fast stop Fast stop DC injection DC injection stop Page 74 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide The fault displayed will depend on the source of the communication fault Modbus com For integrated Modbus CANopen Com network For a network card External fault com For Ethernet card FDR and IP faults 13 8 Emergency stop and safety shutdown 13 8 1 Emergency Stop The emergency stop is activated with a push button When the button is pressed All pumps and fans shut down Power is removed from all PLC outputs All valves to safe position Alarm is generated in the control system Control system is set to stop mode The entire emergency stop system is hardwired and independent of the PLC The emergency stop button is located at the control station and around main system components The emergency stop button has to be manually de activated before the system start up seguence can be started The illustration below gives an overview of how the safety shutdown and emerg
44. aan 56 11 SCRUBBING WATER SYSTEMS OPEN LOQOP 58 1 58 UM RES SUP WE O ip usa m x 58 SEA WATER oxic cas 58 12 WASH WATER AND SLUDGE SYSTEM 59 12 1 SS RT an TE en BEE 59 12 2 CH ee CT 59 e SG HR EE 60 13 AUTOMATON BEEN 62 LSL DEFINITIONS 62 13 2 GENERAL DESCRIPTION EE 62 13 2 1 CONTROL SYSTEM PHILOSOPHY 00000000100000 eaa aa ana 62 13 2 2 ELECTRICAL AND AUTOMATION DANELS 62 13 2 3 SYSTEM BLOCK DI ei EE 62 13 2 4 LIST OF COMPONENTS EE 63 13 2 5 LIST OF CONTROL amp MONITORED ar CEA 64 13 2 6 SYSTIEMAEARMS u u u EEE a kajakin bes vd Soa 64 13 2 7 SPECON D ALAR I L Qul u u u NS u un a ahua 64 129 SV Se CONE GIR ON u sumun Sis 65 13 3 1 COMMUNIGATION u Z u L una a uu PPI S huyu a a 65 13 3 2 REDUNDANT POWER SUPRLY a a a a 66 13 4 MAIN AUTOMATION EQUIPMENT AND CONTROLL
45. afety shower and eye wash 5 0 5 49 Alkali consumption per operating 50 Alkali consumption per consumed 51 Caustic soda storage tank fittings 55 Example of spray protector plate for alkali storage tank air and overflow 55 E 61 AAR EE m OE 64 s len nen BEE 65 Redundant Power Supply 66 VENE VOIN ST NC Pissa ass a 67 zie 75 Solidification temperature of NaOH solution 80 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide 1 Nomenclature amp Abbreviations The following is a list of abbreviations used in this document Detailed terminology is presented in Chapter 15 2 Scrubber Nomenclature Caustic soda Alkali Page 1 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 2 Introduction 2 1 General This Product Guide describes the technical installation matters related to exhaust gas cleaning systems used for Sulphur emission control purposes i
46. ain stream scrubber retrofit installations W rtsil can provide assistance in back pressure measurement Page 4 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 2 6 Dimensioning of scrubbers for a specific gas flow As a general rule scrubbers should be dimensioned for 100 of the gas flow of the connected combustion unit s An Integrated Scrubber can be dimensioned for a smaller gas flow than the total exhaust gas of the connected combustion units This could be the case when all generator engines are connected to the scrubber as generally not all generator engines are fully loaded simultaneously This arrangement will require agreement between the Owner Operator and the relevant Classification Society and will be detailed in an Exhaust Gas Declaration EGD Subject to confirmation from the classification society a scrubber Main Stream Integrated or Multi inlet can be dimensioned for a smaller gas flow than the exhaust gas of the combustion unit s at full load provided that such a compliance principle is based on a realistic operating mode In such cases the SECP and EGD should specify operating modes when the ship is compliant by fuel and when by scrubbing Any engine load exceeding the scrubber capacity would automatically open the exhaust gas bypass line and the ship is responsible for compli
47. ance Adjusting the set point of the load control system of main propulsion engines or generator engines normally used on ships to a value corresponding to the scrubber capacity is a convenient way of ensuring that the scrubber capacity is not exceeded and the ship stays in scrubber compliance mode Page 5 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 3 Rules and regulations 3 1 General The core purpose behind exhaust gas cleaning is the global need to reduce the amount of Sulphur oxides being emitted to the atmosphere by combustion units using fuels containing Sulphur Several major marine legislators have recently imposed rules and regulations concerning different methods of limiting the Sulphur footprint generated by marine traffic These new rules not only limit the amount of Sulphur ships are allowed to emit into the atmosphere but also set a variety of discharge water guality reguirements for the exhaust gas cleaning systems being used The following list details the main legislative reguirements having an effect on the use of exhaust gas cleaning e he International Maritime Organization IMO o Marpol Annex VI o Resolution MEPC 184 59 Guidelines for Exhaust Gas Cleaning Systems e European Union EU o EU Sulphur Directive 2012 33 EU EU Marine Equipment Directive MED 96 98 EC
48. and comprises the power to drive system pumps and monitoring eguipment An Open Loop Scrubber with a fan has a slightly higher power demand The total power of power supplies connected to ancillary devices is somewhat higher to allow for variations in ambient and operating conditions system tuning selection of standard components and margins Due to embedded freguency converters and control algorithms the power demand is optimized e g at reduced power and reduced sea water temperature depending on the system The total power consumption of the scrubber system will be determined depending on the final configuration and plant size 14 2 Maintenance As a general rule maintenance and inspections can be carried out during normal ship operation including port calls Maintenance of the scrubber system is composed of generic maintenance tasks of individual pieces of eguipment such as valves and actuators pumps electric motors heat exchangers tanks water treatment units instruments etc These components should be inspected regularly for leaks etc and maintenance work carried out as recommended by the individual component manufacturers which is summarized into one scheduled maintenance table for the whole scrubber system in the scrubber User s Manual In the scrubber unit the need for maintenance is minimal There are no parts to be greased or oiled Visual internal inspections of scrubber housing packed bed wet filters spray nozzles d
49. ant Power Supply Page 66 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 4 Main automation eguipment and control 13 4 1 Electrical and automation Panels W rtsil Main Control Panel MCP The PLC Data logger and the Operator Screen are located in the Main Control Panel MCP A remote I O is also located in the MCP which processes the input and the output signals from emergency stop safety shutdown switch failure and power supply failure It also contains the link between ship automation system Modbus and hardwired signals and the ship GPS system Figure 4 below gives an overview of the components in the MCP and how they interact Modbus RTU optional Modbus TCP optional Data logger Operator interface Magelis XBTGT Modicon M340 Distributed Advantys STB System Configuration Enables The Use Of Hot otand By PLC Industrial Ethernet managed switch ConneXium Figure 43 Overview of the MCP MCP main functions e PLC Control monitoring and some alarms Safety shutdown system Specialy reguired class shutdown alarms Emergency stop system Datalogging HMI operator screen Links to ship system Touch Screen TSP This is a panel with an additional operator screen which is a duplicate of the main screen in Used to contro
50. as amended by 2012 32 EU e USEPA Vessel General Permit e Classification society regulations 3 2 IMO MARPOL 3 2 1 Regulations The IMO Annex VI serves as the base of worldwide marine sulphur reduction reguirements IMO MARPOL legislation limits the use of fuels containing sulphur as follows Global limit sulphur e 3 50 from 1 1 2012 e 0 50 from 1 1 2020 possibly to be postponed to 1 1 2025 Emission Control Areas sulphur e 1 00 from 1 7 2010 e 0 10 from 1 1 2015 Fuel types are not regulated leaving also room for alternative compliant solutions such as exhaust gas cleaning ref MARPOL Annex VI Regulation 4 The discharge water guality restrictions have been defined in the IMO Scrubber Guidelines MEPC 184 59 launched in 2009 The following discharge water gualities have been given limit values o pH e PAH e Turbidity e Nitrates Page 6 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 3 2 2 MARPOL Documents The MEPC 184 59 lists a variety of documents to be generated for a ship using exhaust gas cleaning as means of meeting the emission legislation reguirements These documents must be approved by the Administration The following contains a short summary of the documents SECP The SO Emissions Compliance Plan is a document describing all the possible alternatives of th
51. ase additional pipe bends are included The following materials should be used in the exhaust gas piping with scrubber systems Material before scrubber Black carbon steel COR TEN or ship standard Material after scrubber EN 1 4410 Super Duplex EN 1 4462 Avesta Duplex 2205 EN 1 4362 Glass Reinforced Plastic GRP Page 36 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 5 7 Interconnecting of exhaust gas pipes In integrated exhaust gas cleaning units and multi inlet cleaning units the exhaust gas pipes from diesel engines can be interconnected under the following conditions e Back flow of hot dirty gases into a standing engine shall be prevented in a reliable manner Open bypass valve in the standing engine or boiler in combination with continuous under pressure conditions at the valve preventing any such back flow in case of a leaking valve is acceptable e Inadvertent choking of an engine in question shall be prevented in a reliable manner A bypass pipe designed to permit full aspiration of an engine in guestion with open bypass valve is acceptable e Generally it should be noted that it is not recommended to connect oil fired boilers to the same scrubber unit as diesel engines due to the operating reguirements of oil fired boiler combustion units In new building ships Safe Return to Port S
52. ated from a local control panel The unit is designed to fulfil discharge water requirements in scrubber guideline in IMO resolution MEPC 184 59 The number of BOTUs is project specific and depends on bleed off flow rate Typically one stand by BOTU is specified for each scrubber system for situations when one of the BOTU s is out of operation or under maintenance For larger installations the number of BOTUs is higher As a rule of thumb the bleed off can be estimated to be 50 110 litres MWh of fuel S depending on the density of the bleed off The amount of generated effluent is very close to the bleed off flow as hydrocarbons and sludge separated in the treatment unit represents only a minor percentage of the total volume flow The unit consists of chemical module and main module The modules can be separated if necessary If they are separated the chemical pipes have to be replaced or extended In case the distance is more than 300 mm also the electrical cabling has to be replaced or extended The main module consists of an influent feed pump a chemical dosing system a flotation stage based on dissolved air flotation sludge removal system discharge holding tank and effluent discharge pump In normal operation the bleed off is extracted from the process tank to the bleed off buffer tank The bleed off flow from the process tank to the bleed off buffer tank is controlled by scrubber automation based on the density setpoint fuel sulphur
53. boilers use compliant fuel 2 3 2 Integrated system An Integrated system is designed to clean the exhaust gases originating from several main and or auxiliary engines in one scrubber unit Integrated systems are typically provided with exhaust gas fans to compensate the additional back pressure created by the exhaust gas cleaning unit s An Integrated scrubber is suitable for all types of ships especially for those with several main engines ships with single main engines and generator engines using heavy fuel and diesel electric ships Exhaust gas fan N 3 way valves Scrubber unit Silencers Exhaust gas boilers SCRs muun EH Selective Catalytic Reduction BERE IL ll Diesel engines ET St Rui ol de Of Figure 2 Integrated Scrubber 2 3 3 Single inlet with venturi Single inlet system has one exhaust gas entry from an individual fuel oil combustion unit which typically makes it a main stream system although in some cases it is also possible to combine exhaust gas pipes from several combustion units into one main pipe before the single venturi Single inlet configuration provides the most flexible solution for most machinery arrangements For very large engine power output where the power rating exceeds the maximum scrubber size currently available multiple s
54. crubbers can be utilized to share the exhaust gas output from such machinery Page 3 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsil Scrubber Product Guide Figure 3 Single inlet system with a venturi 2 3 4 Multi inlet with venturi Multi inlet systems with a maximum of four exhaust gas connections can be used to clean the exhaust gases from multiple fuel oil combustion units In general terms this type of scrubber is supported with the use of a fan to assist in controlling the exhaust gas flow directions especially away from non running machinery Figure 4 Multi inlet system with venturies 2 4 Performance As a default the scrubber system is designed for maximum Sulphur content in the fuel of 3 50 The SOx reduction efficiency corresponds to a reduction of fuel Sulphur content from 3 50 to 0 10 This is a typical guaranteed performance of the system Other alternatives can be offered following discussion with W rtsil 2 5 Combustion units Combustion units can be diesel engines of any make type or application 2 stroke or 4 stroke Oil fired boilers can also be connected to a main stream scrubber Combustion unit gas flow and temperature throughout the load range are needed to determine appropriate scrubber configuration Also exhaust gas back pressure measurement information is needed especially in m
55. ded to be in GRE Glass Re enforced Epoxy material to withstand the corrosion effects of the low pH seawater The use of standard pipe material such as Schedule 80 galvanized pipe work could be considered for the supply pipe work but all low pH washwater piping should be provided in GRE material In addition to the above pumps for open loop operation it may be necessary to have reaction water pumps to provide additional fresh sea water when operating in port to assist in the neutralization of the wash water in order to meet the pH requirements of discharge water as detailed in MEPC 184 59 section 10 1 2 1 alternative to dedicated reaction water pumps would be to utilize seawater already in use on board such as machinery cooling system or ballast water supplies and divert this into the washwater overboard discharge stream of the scrubbing system The pumps for this service would be manufactured as standard seawater pumps Incorporated into the open loop system is a residence tank This tank is to be coated internally in order to resist the corrosion effects of low pH wash water from the scrubber The main purpose of this tank is to provide a residence period for the wash water to allow gas and air to separate out from the water to aid the particulate matter removal in the hydrocyclones of the products of combustion that are held in the gas air stream s This separation allows the particulate matter to settle out and become wetted free of the
56. e Operation in by pass mode The following operating modes are not permitted e Consumption of fuel with Sulphur level exceeding 3 50 without prior agreement with Wartsila e Exceeding maximum design load of the connected machinery or limits stated in the Exhaust Gas Declaration e Prolonged dry running of the scrubber 4 4 Single and Multi inlet Hybrid Scrubbers 4 4 1 Description W rtsil Hybrid scrubbers are a combination of open loop and closed loop sea water scrubbers Both methods open loop and closed loop are operated using only sea water as scrubbing water During closed loop operation caustic soda sodium hydroxide NaOH is added to the scrubbing circulation water In both operation modes the scrubbing water is released back to the sea after it has been processed in water treatment plants However in closed loop operation the scrubbing water is recycled several times within the system and the amount of wash water produced and sea water consumed is thus minimized Due to the minimized effluent flow of closed loop operation a zero discharge mode where no discharge to sea exists is possible by directing the effluent flow in to a holding tank Page 12 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 3 Hybrid Scrubber 14 exhaust Gas Out Scrubbing water Cooli
57. e alkali transfer pump is used for pumping the alkali from the storage tank to fill small tanks in bleed off treatment units The bleed off treatment unit uses the alkali in the treatment process The pump can also be used to empty the alkali storage tank e g in case of tank service or inspection The alkali transfer pump capacity could be e g 10 15m h depending on size of the alkali tank and required time for emptying the tank 10 9 Alkali specification W rtsil scrubber system typically uses 50 NaOH solution as neutralizing agent in the process In some cases for example in arctic environment 20 NaOH solution is feasible due to its low freezing temperature The customer operator should acquire the chemical according to the following specification Page 56 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 50 NaOH solution specification typical for marine scrubber SODIUM HYDROXIDE NaOH 50 SOLUTION TECHNICAL OUALITY TECHNICAL NAME SODIUM HYDROXIDE SOLUTION 50 WATER SOLUTION CHEMICAL FORMULA NaOH ag CAS N o 1310 73 2 EINECS N o 21 5 185 5 ADDITIONAL TRADE NAME S CAUSTIC SODA 50 LYE 50 CHEMICAL COMPOSITION SODIUM HYDROXIDE NaOH 45 52 weight CHLORIDE Cl lt 0 1 weight as NaCl 20 NaOH solution specification to be agreed upon project specific basis SODI
58. e conducted through the area provided that the engine casing can be isolated from the funnel with fire dampers Insulation for noise absorption purposes can be installed in the area Any possible common boundary of funnel with interior spaces fulfill A O fire insulation standard as a minimum 6 Pressurized fuel oil and lubricating oil pipes are not installed in the same area 7 Danger to persons onboard due to hot surfaces is minimized After the scrubber the exhaust gas has high relative humidity Corrosion resistant materials should be used In integrated scrubber systems the exhaust gases are collected into one common manifold connected to the scrubber unit with the same diameter as the scrubber unit s exhaust gas inlet connection To compensate for pipe bends the diameter of the manifold is slightly larger than diameters usually used in exhaust gas pipes The diameter can be smaller in the beginning and increase towards the scrubber inlet as more pipes are connecting to the manifold The exhaust gas suction branches should be connected to the manifold in such a way that the exhaust gas flow from different pipes do not interfere with each other Pipe joints should not be opposite to each other To keep the flow resistance low the connections to the manifold should be smooth and directed towards to the scrubber inlet The size of the bypass damper and the suction branches can be as usually used in exhaust gas pipes or slightly larger in c
59. e exhaust gas pressure loss over the exhaust gas scrubber at design conditions is typically 1500 Pa at 100 MCR for all scrubbers in the Wartsila portfolio Depending on the diesel engine and exhaust pipe arrangement such pressure loss is possible to accommodate within the permitted back pressure but should be verified In retrofit installations the exhaust gas system back pressure should be measured onboard a separate guideline can be supplied by Wartsila 5 1 4 Noise attenuation The scrubber unit provides some noise attenuation However it is recommended to install the scrubber after normal exhaust gas silencers that would in any case be necessary for bypass operation 5 2 Single inlet system The single inlet scrubber has only one gas inlet so it very often is a main stream scrubber It is however possible that there are two combustion units connected to one venturi making it an integrated system and requiring the use of an exhaust fan in the system Typically an exhaust fan is not needed for a single combustion unit Page 29 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 5 3 Multiinlet system In a multi inlet scrubber there are several venturis connected to the scrubber Typically the multi inlet system is an integrated system with several combustion units connected reguiring an exhaust fan
60. e particular ship is capable of using in order to meet the emission reguirements set for the sulphur emission control areas SECAs These alternatives mainly consist of 3 different scenarios which are 1 Using compliant fuel lt 0 10 5 2 Using different fuels inside and outside SECA areas lt 0 10 S inside SECA and 3 Using an EGC System The SECP also lists all the combustion units onboard and which of them are connected to the exhaust gas cleaning unit s ETM A B Under MEPC 184 59 there are two possible compliance routes Scheme A or Scheme B 1 Scheme A EGC System Approval Survey and Certification using Parameter and Emission Checks 2 Scheme B System Approval Survey and Certification using Continuous Monitoring of Emissions The ETM A B is the main technical manual that describes a variety of relevant key process parameters of the particular exhaust gas cleaning system These key border values have been confirmed by the administration meaning that when the exhaust gas cleaning system is being used it should stay within the limits at all times to ensure compliance The also states the corrective actions to be performed in case exceedances are occurring OMM The Onboard Monitoring Manual is a document listing all the essential sensors used to demonstrate system compliance These sensors mainly consist of exhaust gas monitoring key process parameters such as scrubbing water pressure and flow and di
61. eat is removed in a sea water heat exchanger Scrubbing water pH and thus the cleaning efficiency is automatically monitored and controlled by alkali dosing As the scrubber overall dimensions together with space for the auxiliary equipment and maintenance are exceeding e g conventional silencer dimensions a slightly larger engine casing area may be reguired In new building projects it is important that functionality of the EGC system is considered in the ship project design phase in order to provide efficient scrubber system together with optimized space utilization 2 Closed Loop Sea Water Scrubber Exhaust Gas Out muu Scrubbing water mun Cooling water dl en muu Make up water muu Bleed off Effluent La as ET Alkali q T E dmg p Eegen Optional Scrubbing P N water mP c mi TT K ji w gt Bleed off Treatment Unit sat Cooling Water Pump d W RTSIL SG Ta soo OI Corporimon Deco GEO cote Omar Figure 5 Closed loop sea water system principle diagram The basic process principle is similar for both main stream and integrated scrubbers When comparing sub systems most differences can be found in the exhaust gas system Each sub system will be discussed in more detail under dedicated chapters in this document highlighting the differences i
62. econd alarm occurs while there already is an existing alarm the circuit will close for 5 seconds and then open again If a third or fourth alarm occurs etc the alarm will again close for 5 seconds Function will be the same for both hardwired and Modbus a IAS Scrubber System Ship System Figure 40 Alarm connection principle Page 64 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 3 System configuration 13 3 1 Communication System communication is established as a ring network In a ring network all devices or network infrastructure components are connected in a loop Through this type of topology a network redundancy is achieved Any cable in this system can be damaged without leading to problems with communication The Fibre optical ring is used at the upper level and Modbus TCP Ethernet copper cable at the lower level We use fibre optic cable due to the great uncertainty about the length between the panels electrical disturbance and communication speed The Fibre optical cable is less affected by the environment The fibre optical ring is connected to switches located in the Main Control Panel MCP Network Switch Panel 1 NS1 and Network Switch Panel 2 NS2 Each Network Switch Panel is located as close to a group of scrubber eguipment as possible
63. elimm 1600 500 435 420 550 580 610 Water weight tonnes 100 U 10 Service 2 Figure 11 Single entry scrubber Page 17 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Double Entry Scrubber Figure 12 Double Entry Scrubber Table 2 EGC unit dimensions for sizes 2 15MW 2 inlets Page 18 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Exhaust Gas Mass Flow kg s 4 30 8 60 12 90 17 20 23 65 3225 B Overall Length mm 7 2065 2860 3390 4115 4895 5810 D 7 4850 5400 6785 7690 9240 10030 595 3380 Difference between bottom part and inlet mm 0 0 0 0 0 1415 N1 Inletnominalbore mm 7 400 600 750 900 1100 1320 N2 Outlet nominal bore mm 7600 850 1000 1100 1300 1600 Dry weight tonnes 21 28 41 57 76 110 Wetweight tonnes 27 38 54 85 117 175 Water weight tonnes 0 7 1 Table EGC unit dimensions for sizes 20 70MW 2 inlets Exhaust gas flow gis 43 0 53 75 645 75 25 86 96 75 107 5 118 26 129 13975 1505 B 6150 6850 7600 8350
64. ency stop Is arranged SAFETY SHUTDOWN EMERGENCY STOP When one of the safety switches is activated an alarm will be generated Redundant24VDC power Redundant24VDC power and trigger the E stop circuit n When one of the emergency H push buttons is activated an alarmis generated and powerto all outputs are cut Internal powering in panels Safety stop scrubber Starter or High Hiqh level scrubber Remote HighHightemperature in scrubber outlet HighHigh pressure in venturi inlet Figure 44 Emergency stop Page 75 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 8 2 Safety shutdowns The following signals cause immediate system shutdown and for scrubbers with exhaust gas bypass valve immediate release of that valve 1 High high level scrubber 2 High high temperature scrubber outlet 3 High high pressure venturi inlet Safety shutdown is similar to emergency stop All pumps and fans shut down Power is removed from all PLC outputs All valves to safe position Alarm is generated in the control system Control system is set to stop mode The safety shutdown function is hardwired and independent of the PLC The illustration above gives an overview of how the safety shutdown and emergency stop is arranged 13 8 3 Black
65. ended jacket surrounding the exhaust gas outlet pipe in the funnel Thus humid gas from the scrubber is mixed with dry air from the engine casing reducing humidity and plume opacity This is achieved by arranging the jacket as an enclosure with an upper end clearly above the end of the stack 5 6 Exhaust gas pipes All parts of the exhaust gas system before and after the scrubber are optimized concerning pressure losses to maintain acceptable exhaust gas back pressure at the engine outlet To avoid droplet entrainment with the gas flow the flow velocity after the scrubber is kept low not exceeding 15 m s at full power welding seams should be smooth and knuckles avoided Thermal insulation of the exhaust gas pipes after the scrubber can be omitted as the system is not designed for dry running of the scrubber In case of Closed Loop scrubbers specified also for temporary operation without cooling the exhaust gas after the scrubber can be warm and have high water content In such cases thermal insulation can be considered to minimize the amount of condensation A catcher flute can be installed in the upper end of the exhaust pipe after the scrubber to prevent condensation exiting the stack Hot uninsulated exhaust pipes can be used in the funnel area as on any ship under the following conditions 1 In the funnel being an open area 2 Notin the engine casing being Category A Machinery Space 3 Engine room ventilation exhaust air can b
66. er temperature is ensured by a thermostatic valve and a recirculation line to avoid crystallization of the sulphates in scrubbing water A sufficient sea water flow is needed to ensure the scrubbing water cooling Closed loop can be operated without cooling system but in that scenario the loss of scrubbing water due to evaporation will be higher This results in a larger need for replacing make up water Another conseguence of the increased evaporation will be the visible plume of steam left behind Open loop system doesn t require cooling systems to be installed as the scrubbing water in the process is not warming up enough during the single time visit it makes in the scrubbing unit before being discharged back to the sea Page 39 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 8 Make up Water System Closed Loop 8 1 General In closed loop operation the scrubbing water is circulated several times through the scrubber before being extracted from the process as bleed off This bleed off needs to be replaced with similar sized flow of new make up water in order to maintain a stable water level in the process tank The make up water used is sea water The amount of make up water added is typically less than 1 of the total closed loop scrubbing water flow 8 2 Water quality Closed loop operation is n
67. ers special consideration by classification society is required The temperature limits should be considered as above a temperature of 49 carbon steel is susceptible to stress corrosion cracking also known as caustic embrittlement If higher tank temperatures are expected special measures including weld stress relieving and use of alternative materials should be considered case by case NOTE any part of tank or tank fittings which may come in to contact with caustic soda should not contain the following metals or alloys aluminum magnesium zinc brass and tantalum Caustic soda corrodes these metals and the reaction may generate flammable hydrogen gas Particularly reaction with aluminum is vigorous Long term exposure to caustic soda can deteriorate materials containing silica e g glass It is Page 51 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide recommended to check supplier s compatibility information regarding gaskets for manholes and flanged tank fittings Typically PTFE or EPDM should be used Viton is not suitable as gasket or sealing material 10 4 Tank coating Internal tank coating is recommended to avoid corrosion that may occur particularly on tank upper parts Major suppliers have epoxy resins that are suitable for this purpose Suppliers recommendation is to be followed concernin
68. eye wash signs Following personal protective equipment must be worn when handling alkali Page 49 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide e mpervious overalls e Protective clothing e Chemical boots e Safety helmet e Safety goggles or face shield All locations where alkali is handled are to be provided with good ventilation See Appendix 1 for more information of NaOH 10 2 Consumption Alkali consumption depends on the concentration of the solution engine operating power engine specific fuel oil consumption and fuel Sulphur content The alkali supply is automatically controlled based on these parameters Indication of the alkali consumption can be seen in the figure below It also indicates the relations of the affecting parameters Alkali demand per engine power 3 596S fuel 3 0S fuel 2 5905 fuel 2 0905 fuel 5 S fuel lt gt Q E gt n po e lt 5000 10000 15000 20000 25000 30000 35000 40000 Operating power kW Figure 34 Alkali consumption per operating power As a rule of thumb the alkali consumption can be estimated to be 5 liters MWh fuel S In case 20 NaOH solution is used the consumption will be proportionally higher than for 50 solution The alkali consumption in design condit
69. fuel with appropriate Sulphur content e Wet running of scrubber with alkali injection out of operation 4 2 Closed loop sea water integrated system 4 2 1 Description An ideal location for an integrated scrubber serving several combustion units is aft of or within funnel casing This arrangement gives a minimum loss of useable cargo or accommodation space with functional gas flow and access to main components Rest of the exhaust systems and casing are following conventional design with silencers installed before scrubber intake 4 2 2 Operation Operation is similar to main stream sea water system but with certain consideration to machinery operational profile It may not be necessary to dimension the integrated scrubber according to installed machinery power as such dimensioning may result in unnecessary over dimensioning as the installed power is not operated in practice In order to dimension the integrated scrubber system properly it is relevant to identify the maximum propulsion full speed and electrical power as well as heat demand of the ship refer to section 2 6 above In case of integrated scrubber the maximum exhaust gas flow is designed to cover all relevant operating modes as presented in the example e Sea going Main engine s at 100 MCR generator engine s load unless shaft generator s are expected to be used in this operating mode e Sea going Diesel Electric machinery Generator engines providing full prop
70. g intended use surface preparation and application In the following some example coatings from Jotun Teknos and Tikkurila are presented Other products with similar properties can also be used Table 14 Example products for tank coating from Jotun Coating for buffer and alkali tanks Product 7 Jotun Marathon 2 1 Description High solids two pack epoxy coating reinforced with glass flakes Steel structures subject to aggressive exposure both atmospheric and mechanical For aggressive chemical exposure Specific gravity 1PD Film thicknesses 400um I SA2 ISO 8501 1 All surfaces should be clean and free from contamination The surface should be assessed and treated in accordance with ISO 8504 The temperature of the substrate should be minimum 10 and at least 3 above the dew point of the air temperature and relative humidity measured in the vicinity of the substrate The coating should not be exposed to oil chemicals or mechanical stress until cured Dust dry after 5 5 hours Touch dry after 12 hours Fully cured after 7 days Primer Marathon 2 1 Pink a O Finish 41 Table 15 Example products for tank coating from Teknos Coating for buffer and alkali tanks Product 7 Teknos Inerta 280 Description Used as coat in epoxy systems inside kerosene and oil tanks Withstands aliphatic hydrocarbons alkaline solutions and acids Filmthicknesses 5000 ss Sa2 ISO
71. gal Separator installation 9 4 Holding tank In operational situations where effluent discharge needs to be avoided the effluent can be diverted from the effluent monitoring module EMM to an effluent holding tank for later scheduled and periodical discharge The volume of such storage tank should be dimensioned according to the time the scrubber system is to be operated without discharge The recommended tank material is black steel Internal tank coating is recommended to avoid corrosion The tank should be provided with low suction for complete draining prior to maintenance There should also be air pipe from the tank The holding tank should be provided with the following alarms e Level low e Level high The holding tank should be provided with the following indications e Local level gauge tank e Local level gauge tank s water lock e Local temperature gauge The holding tank should be provided with a standard 600 mm x 400 mm manhole 9 5 Bleed off piping The bleed off is led from the scrubbing water circulation to the distribution pipe and further to the bleed off treatment units Page 47 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Material Similar to scrubbing water piping Valves Rubber lined butterfly valves stainless steel disc Gaskets and seals EPDM 9 6 Sludge Impu
72. gas air bubbles where it can then be captured in the hydrocyclones and subseguently collected in sludge holding tank s The residence tank is typically arranged and sized to provide a residence time of a minimum of 2 minutes for the wash water in the system the larger the tank the better depending upon space availability Sludge tanks generally are in the form of a standard IBC container of 1m capacity Positioning of these tanks should be arranged to allow tank exchange when full The contents of the full tank s are to be disposed of ashore and cannot be incinerated on board or disposed of to the sea 184 59 section 10 4 The tanks are arranged such that all services are provided in the lid of the tank in order to facilitate easy replacement of tanks when full without the need for extensive disconnection and reconnection The sludge collected in these tanks from de sludging the hydrocyclones normally once a day is allowed to settle and the separated water is then pumped back into the residence tank to pass it through the hydrocyclones again before discharge with the wash water overboard The seawater supply and discharge wash water are monitored for pH temperature turbidity and PAH as a measure of the hydrocarbon content of the wash water as required by MEPC 184 59 section 10 12 2 Residence tank In open loop the scrubbing water returning from the EGC Unit s named as wash water is led into a residence tank This tank wor
73. gorized as non essential systems the only exception being the exhaust gas bypass valve There are also no exhaust gas emission related reguirements for redundancy The ship specific SOx Emissions Compliance Plan SECP specifies n case of malfunction of the system the ship will as soon as possible take corrective actions to restore compliant functionality or stop using non compliant fuel Regulation 3 of MARPOL Annex VI states that the emission regulations do not apply to any emission resulting from damage to a ship or its equipment provided that all reasonable precautions have been taken after the occurrence of the damage or discovery of the emission for the purpose of preventing or minimizing the emission Page 77 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 14 Miscellaneous 14 1 Power demand The power demand of W rtsil Closed Loop Scrubber in normal conditions varies between 1 0 1 5 of the installed engine power The power consumption is lower in colder sea water temperatures than in tropical conditions The power demand of the Integrated Closed Loop Scrubber with fan increases towards top ship speeds to around maximum of 2 5 The power demand of W rtsil Open Loop Scrubber is typically between 1 5 2 5 of the installed nominal power being scrubbed This power dem
74. he alkali transfer pump The coagulant and flocculant tanks can be filled by a hand pump or pouring directly from the chemical canister 9 3 Centrifugal Separator Bleed off treatment unit As an alternative solution for DAF BOTU Centrifugal Separator BOTU can be also utilized to treat the closed loop bleed off The Separators are fully mechanical and do not require any chemicals to be used The working principle of a centrifugal separator is based on different densities being separated by a fast rotating bowl The sedimentation becomes more effective with a higher clarification surface area and a shorter sedimentation path The unit of measurement for separators is times g force The maximum g force of a bowl depends on the diameter of the bowl and of the bowl speed The maximum g force is mainly limited by the bowl material stainless steel The Centrifugal Separator is of self cleaning type The cleaning process is monitored and controlled via control cabinet and a timing unit The sludge collected in the sludge holding space is discharged to the EGC Sludge tank on regular intervals Technical information e 7000I h processing capacity per unit Several units can be used Max density 1 25g ml 15 C Weight 1060 kg Bowl speed 8000rpm Bowl weight 206 kg Power consumption 15 18kW less than 1kW in stand by Technical water consumption 10 20 liters hour Working air consumption 0 01Nm3 h Working air supply pressure 3 10bar Page
75. he main input data for alkali feed control are Sulphur content of the fuel and engine load The main control is automatically adjusted based on measured pH of scrubbing water to compensate the possible variation and inaccuracy in fuel Sulphur data or engine load The engine load can be derived from fuel flow fuel rack position or generator load in case of diesel generator The Sulphur content of fuel in use is to be entered typed into the system by the operator based on e g Bunker Delivery Note Caustic soda bunkering areas tanks and sounding pipes and feed module should be provided with warning signs to ensure that all crew members are aware of the hazards involved in general and in particular when any maintenance or repairs are made The warning sign to be used is standard corrosive sign with text Sodium Hydroxide Solution and UN 1824 nearby Additionally texts NaOH Solution and Caustic Soda Solution can be included as well Figure 32 Corrosive sign Safety stations with shower and eye wash should be arranged for relevant alkali handling areas such as bunker stations alkali feed module area and bleed off treatment units If the safety shower is located outdoors it must be insulated and heat traced in order to prevent freezing The requirements for the safety shower are defined e g in standard SFS 5411 The safety showers should be clearly marked with dedicated signs Figure 33 Safety shower and
76. ide 9 2 4 Pre conditioning water To enhance the cleaning efficiency of the BOTU s sea water may be used as pre conditioning water before the bleed off is fed to BOTU s Sea water is supplied with a pre conditioning water supply pump Automatic start of the pre conditioning water pump can be enabled or disabled from the scrubber automation The pre conditioning pump can be manually started from the automation system e g at high turbidity values The pre conditioning seawater supply pump is automatically stopped if all BOTUs are stopped The speed of the pump is automatically controlled by the number of running BOTUs There two constant speed settings higher speed when two BOTUS are running and lower when one BOTU is running AB d i H 23 KA l fg GB Tae kh GP ir iL ef Gei au v aM i jo k E E A asti JA x lp 3 i 1 JA B D dh T m ef d op Se di N j G zd J b Kg A D v JN 1 N pres et Ed LP 2 ja gt An SA ar i A si i i aah f Le A i al MA j Oe de a ue 3 DS L kg lus Lima ETK i jr MIR NC be Lea PSA mr ET Vh A MP TAKEN v H m hop j z MS 2 N A E 06 wie a m zs Lef T SRA y N ve
77. igned to operate in maximum static and dynamic inclinations set by classification societies The scrubber unit weight is affected by both size scantlings and material choice As a standard concept the scrubber unit is manufactured in high grade alloy steel to resist corrosion and should be suitable for the life of the ship The scrubber unit can be selected according to the following criteria 1 Scrubber dimensioning criteria include gas flow gas inlet temperature permitted pressure drop and some other parameters such as water capacity The indicated scrubber capacity MW is only indicative The final scrubber selection needs to be based on the actual maximum gas flow that is to be fed into the scrubber Additional project specific conditions may apply and have to be considered on a case by case basis such as oversized units e g for reduced pressure drop or exceptionally high temperatures 2 Engine exhaust gas temperature in the engine maker s documentation is typically given in ISO 3046 conditions at different loads Typically the highest temperature is at 10096 load From this figure the expected temperature drop over the exhaust gas boiler may be deducted and a project specific allowance maybe 30 100 added for variations in ambient engine and exhaust gas boiler conditions 3 For rough orientation typical specific exhaust gas flow at full power of 2 stroke engines is 7 5 9 5 kg kWh and 4 stroke engines 6 0 8 5 kg kWh
78. intenance instructions are given in the User s Manual and they should be followed in conjunction with general good housekeeping Page 79 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 15 Appendixes 15 1 Appendix NaOH 15 1 1 General e Typical commercial solution is 50 weight Characteristics of 50 solution are O O O Density 1 52 t m Solidifies freezes at 12 C Should be kept above 20 C when pumped Boiling point ca 145 C Transported typically at 20 40 C pH 14 In some cases 20 solution is interesting at its freezing point is 30 C See below For on deck storage on ships operating in cold environment this could be potential The two commercially interesting solutions 20 and 50 are shown in the figure below 160 C 140 C 120 C 100 C 80 C 60 C 40 C 20 C SOLIDIFICATION TEMPERATURE 09 20 309C NaOH SOLUTION Figure 45 Solidification temperature of NaOH solution 15 1 2 Safety aspects e Colorless and odorless e Causes eye and skin burns eye and safety showers needed in handling areas e Aspiration hazard ventilation of gases has to be taken care of e No fire risk e react with water producing heat and gases thus affecting fire extinguishing strategies in NaOH storage area e Ca
79. ions is given in the relevant project documentation 10 3 Storage Onboard storage capacity is dictated by the following parameters vessel autonomy alkali consumption and vessel s operation profile and area Page 50 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 3 5 S fuel 3 0 S fuel 596S fuel esses e 2 0765 fuel 1 5 S fuel m E c O o 5 n O 76 lt 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 Fuel consumption ton Figure 35 Alkali consumption per consumed fuel Reguired storage tank capacity can be calculated e g by comparing it to the fuel consumption If ship s annual fuel consumption is 10 000 tonnes and average fuel Sulphur content 2 50 the corresponding alkali consumption is 630 m per year If alkali is bunkered every two weeks the required amount is 24 On top of this some margin should be added to take into account the effect of possible higher Sulphur content fuel or different combustion equipment operating profile For vessels that are operating in regular routes or in specific areas the storage capacity could be equal to the fuel bunkering interval To minimize the transportation costs and ease the bunkering arrangement tank capacity should be adequate to receive the total volume from one delivery truck The ideal sto
80. ks as a storage tank from which wash water is being pumped to the hydrocyclones to be cleaned The residence tank has its own inner structure that has an important role in the cleaning process as well Page 59 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Figure 38 Residence tank 12 3 Sludge System Sludge from hydrocyclones is collected as stated above in standard containers The amount of sludge generated from normal combustion is approximately 3 5 5 0 kg MWh In some cases when operating in shallow water the amount of sludge may increase due to the capture of estuarine sand and silt In general the collected sludge is similar to engine room sludge The composition of the sludge is mainly hydrocarbons soot and metals The sludge and water phase very quickly separate allowing the water phase to be returned for final cleaning prior to discharge which keeps the guantity of collected sludge for disposal as small as possible Scrubber sludge could be stored with engine room sludge but due to its concentrated nature may become difficult to pump if allowed to settle If disposal with normal engine room sludge is arranged the scrubber sludge should be pumped into the normal sludge stream during disposal to ensure mobility and mixing Scrubber sludge cannot be disposed of to the sea or incinerated
81. l PRT The process tank Panel PRT is a remote I O Panel for the closed loop process tank These panels processes the input and output signals for instruments and valves in and around the process tank All I O is processed in the PLC located in the MCP The starter for the tank ventilation fan DOL or VSD see el drawings for details is also located in this panel Emergency stop is hardwired from MCP Water Treatment Plant panel WTP The water treatment plant panel WTP is a remote I O panel for instruments and valves in a water treatment system All I O is processed in the PLC located in the MCP Emergency stop is hardwired from MCP Hydrocyclone I O Panel HC1 2 The hydrocyclone I O Panel HC1 2 contains a remote I O inputs and the outputs signals from instruments and valves in and around the hydrocyclone The number of hydrocyclone I O Panels varies with the number of hydrocyclones installed All I O is processed in the PLC located in the MCP The starter for the hydrocyclone pump DOL or YD see el drawings for details is also located in this panel Emergency stop is hardwired from MCP Scrubber I O Panel SC1 2 The scrubber I O Panel SC1 2 contains a remote I O input and output signals to and from instruments and valves in and around the scrubber The number of scrubber I O Panels varies with the number of scrubbers installed All I O is processed in the PLC located in the MC
82. l Scrubber Product Guide SCRUBBER MODE BY PASS MODE Figure 9 Exhaust gas cleaning unit in normal mode right and bypass mode left The bypass line is controlled with a fail safe three way bypass damper the damper is kept open directing gas flow to scrubber by compressed air or other media and it is closed by a spring or similar positive means not requiring external energy The flow to the scrubber is closed and the bypass line is opened in the following situations 1 Temperature in scrubber is too high 2 Water pressure in scrubbing water supply line is too low 3 Loss of holding energy in exhaust gas bypass valve 4 The exhaust gas cleaning system back pressure is too high The temperature is measured before and after the scrubber The bypass damper is opened in case of excessive temperature The exhaust gas cleaning system back pressure is measured at the bypass damper or at the scrubber inlet and the bypass line is opened if the pressure reading is too high 4 6 Piping Material Requirements This chapter applies to piping not installed in gas hazardous areas in particular for plastic and GRE Glass Re enforced Epoxy materials including scrubbing water sea water bleed off effluent caustic soda and exhaust gas piping The latter is subject to approved safety arrangements to prevent overheating All the piping penetrations etc is constructed according to classification society s rules All piping is in Class
83. l Scrubber Product Guide The water monitoring pump 701 starter is always a DOL Feeding the outlet water monitoring system with wash discharge water to ensure that the acguired measurements can be made This pump runs when supply or discharge pumps runs Emergency stop is hardwired from MCP Refer to el drawings and system specification for details Water Pump panel WP1 2 The water pump starter DOL YD or VSD are commonly used in various transfer purposes Emergency stop is hardwired from MCP Size and layout is depending on system configuration Refer to el drawings and system specification for details Alkali Feed Module panel AFM1 2 The alkali feed module Panel AFM1 2 contains a remote I O input and output signals to and from instruments and valves in and around the alkali feed system The number of alkali feed module Panels varies with the size of the scrubber system All I O is processed in the PLC located in the MCP Emergency stop is hardwired from MCP Refer to el drawings and system specification for details Bleed off Treatment Unit panel BOTU1 2 The bleed off treatment unit Panel BOTU1 2 contains a remote I O PLC inputs and outputs signals to from instruments and valves in and around the bleed off treatment system The number of bleed off treatment units varies with the size and amount of scrubbers in the system All I O is processed in the PLC located i
84. l and monitor the scrubber system The operator screen is often placed in the Engine Control Room Can be loose supply or fitted in a panel Network switch NS1 2 The NS panel contains an Ethernet switch which is the link between the fibre optic and the copper Cat 5e ring The fibre optic cable utilizes the possibility for more than 100m of cable Limit of Cat5e and the advantage of little disturbance from the surroundings Cat5e cable is run between local panels with as short distance as possible Effluent Monitoring Module EMM Page 67 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide The effluent monitoring module panel EMM is a remote I O panel for the effluent and monitor pH PAH and Turbidity in the water before discharge overboard All I O is processed in the PLC located in the MCP Emergency stop is hardwired from MCP Residence Tank Panel RET The residence tank Panel RET is a remote I O Panel for the water treatment These panels processes the input and output signals for instruments and valves for the different water treatment systems All I O is processed in the PLC located in the MCP The starter for the tank ventilation fan DOL or VSD see el drawings for details is also located in this panel Emergency stop is hardwired from MCP Process Tank Pane
85. ling sea water Can be also used to heat the deplume air Holding Tank Tank designated to hold water on board to provide for temporary zero discharge where required Can apply to closed loop and sea water hybrid closed loop operation Page 84 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Hybrid Scrubber EGC system capable of alternating between open loop and closed loop mode Hydrocyclone The unit that incorporates a number of hydrocyclone elements to make up a treatment unit of reguired treatment capacity Hydrocyclone element A single element used as a water separation technigue in which impurities in water are separated based on density differences IBC Sludge Tanks Portable IBC e g 1m containers for collection of sludge removed in the water treatment plant Integrated EGC Unit scrubber A single EGC unit scrubber for cleaning the exhaust gases of several fuel oil combustion units Lye See sodium hydroxide Main Stream EGC Unit scrubber A single EGC unit scrubber for cleaning the exhaust gas from a single fuel oil combustion unit Make up Water Fresh or sea water that is added to EGC unit scrubbing water to replace any process water losses MCR Identifying the Maximum Continuous Rating power load of the fuel oil combustion equipment connected to the EGC unit scrubber
86. llast tanks or any other tank containing a fluid will be rated in accordance with Classification Society Rules Such pipe work should not pass through fuel oil tanks 4 7 Dimensions of scrubber unit deplume residence tank and hydrocyclone 4 7 1 General The scrubber unit dimensions mainly depend on the exhaust gas mass flow and the necessity to limit the gas velocity within the scrubber to 3 to 3 5m s this encourages water to drop out of the scrubbed gas flow as higher velocities will cause water to be carried away with the gas flow where it exits the funnel top and higher pressure drop Typically the scrubber unit is in 2 or more pieces depending on the number of venturis The bottom part of the scrubber is attached to the main scrubber body with a flange connection When the scrubber is installed into the ship the bottom part can be disconnected from the main scrubber body if this is needed due to space or lifting requirements Especially in retrofit installations this feature of the W rtsil scrubber can be a big benefit The cross section of the scrubber unit main body is round which provides a rigid structure The scrubber unit is equipped with mounting brackets feet in the bottom part The unit has also mounting brackets for lateral supports in the top cone The venturi exhaust gas inlet s to the unit can be installed longitudinally transversally or in any arbitrary direction in the ship The scrubber unit and ancillary components are des
87. losed loop RET 1 Water Treatment Open Loop Panel Distbuted O steterpanel PRT 1 Process Tank panel Distributed VOlstarter panel um 1 Water Treatment Plant panel Distributed Olstarter panel 5 mor X Hydro cyclone Panel Distributed Olstarter panel 5 1 Scrubber SC 200 SC 400 Panel Distributed Olstarter panel 5 au Scrubbing Water Pump Panel Strerpanl auer X Scrubbing Water Cooling Pump panel Strerpane map X Reaction Water Pumppanel Starterpan _ eru X Scrubbing Fresh Water Pump Panel Starterpane _ mert X HyqrocydonePump i Strerpam X ExmutGasFan Sein HDAFI X DepumeArFon Stanerpan uge Venturi booster pump Stepan _ WMP100 Water Monitoring Pump 100 a Monitoring circulation pump NEM WMP700 Water Monitoring Pump 700 Ware Monitoring circulation pump WMP701 Water Monitoring Pump 701 d Monitoring circulation pump Water Pump panel Starter panel TRP1 Transfer Pump Panel Starter panel AFM X Alkali Feed Module Functional system that supplies and controls alkali dosage to the process BOTU1 Bleed off Treatment Unit Unit for treatment of bleed off water SP 1 intrinsic Safe Panel A boundary between a safe area and a hazardous Ex area Table 17 List of components panels Page 63 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY F
88. me that outputs retain their current state without receiving a write command from a master controller When this period expires outputs are set to their fallback state 13 7 2 Motor Starter TesysT LTM R When communication between the LTM R controller and either the network or the HMI is lost the LTM R controller is in a fallback condition The behavior of logic outputs O 1 and 2 Fallback setting selection can include Table 20 Fallback setting selection Port Fallback Setting Description Hold O 1 O 2 Directs the LTM R controller to hold the state of logic outputs O 1 and O 2 as of the time of the communication loss Run Directs the LTM R controller to perform a Run command for a 2 step control sequence on the communication loss O 1 O 2 Off Directs the LTM R controller to turn off both logic outputs O 1 and O 2 following a communication loss O 1 O 2 On Directs the LTM R controller to turn on both logic outputs O 1 and O 2 following communication loss O 1 On Directs the LTM R controller to turn on only logic output O 1 following a communication loss O 2 On Directs the LTM R controller to turn on only logic output O 2 following a communication loss The LTM R is configured to OFF in the event of communication loss Holdup Time Enter a value in sec Default 1 s The Holdup Time is the period of time that outputs retain their current state without receiving a write command from
89. mical pH gt 7 e g sodium hydroxide that is used to neutralize acidic components from e g in exhaust gas or process liguids Alkali Feed Module Functional system that supplies and controls alkali dosage to the process Alkali Storage Tank Tank for storage of alkali Alkalinity Alkalinity is a measure of the buffering capacity of water or the capacity of bases to neutralize acids Alkalinity does not refer to pH but instead refers to the ability of water to resist change in pH Bleed off A stream of water that is extracted from the closed loop circulation to remove contaminants Bleed off Treatment Unit BOTU Unit for treatment of bleed off water Booster Pump Pump used to supply high pressure scrubbing water to a venturi of a scrubber Buffer Tank Tank for liguid flow control purposes Caustic Soda See sodium hydroxide Closed loop Process principle in which the bulk of the scrubbing water is re circulated Coagulation Phenomenon that is often utilized in conjunction with flocculation in water treatment systems Coagulation chemical neutralizes Zeta potential of colloids and breaks the dispersion Continuous Emission Monitoring System CEMS Monitoring system provided to monitor emissions to air after scrubbing Cooling Water Medium typically sea water that is used for cooling of the scrubbing water Cooling Water pump Pump that provides Medium typically sea water for cooling of the scrubbing water Deplume A unit p
90. n overview of the automation system Dependent of the panel s desired function it contains some of or several of these components PLC Data logger Operator screen Remote I O handling input and output signals from instruments and valves etc Starters VSD DOL or Y D for pumps or fans 13 2 3 System block diagram system block diagram is a document where components or panels are represented by blocks diagram shows the connection between all main components and interface with other systems The purpose of the diagram is to give an overall understanding of the concepts Page 62 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 2 4 List of components panels Tag No Eguipment function Description Location Panel a PLC Distributed Network we 1 Main ee Switch Touch Screen Data logger CEMS Continuous Emission Monitoring System s a Touch Screen Panel Touch Screen Operator station ast 4 enin Switch Panel often located in Network Switch Panel often located in Network Switch 5 7 Scrubbing Water Monitoring Module Water monitoring instrument Wash Water Monitoring Module Water monitoring instrument ou _ EMM 17 Effluent Monitoring Module Effluent monitoring c
91. n at least 3 above the dew point Thinner Thinner 1031 or acetone TEMALINE BL Drying times Dust dry after 8 hours Touch dry after 12 hours Fully cured after 7 days Finish TEMALINE BL Coating for buffer tank Tikkurila TEMALINE LP PRIMER Description A two component amine adduct cured epoxy paint Resistant to splashes and immersion in water and chemicals Used as coat in epoxy systems inside kerosene and oil tanks Withstands aliphatic hydrocarbons alkaline solutions and mild acids Temperature CO n U U C C CC Specific gravity 1 4 kg l mixed 300 um Colours Light grey and reddish brown Pre treatment Sa2 ISO 8501 1 All surfaces must be dry The temperature of the ambient air surface or paint should not fall below 10 during application and drying Relative humidity should not exceed 80 The surface temperature of the steel should remain at least 3 C above the dew point Thinner Drying times 10 5 Storage tank heating 50 caustic soda will solidify at temperatures below 12 and therefore the tank should preferably be located so that it shares common boundaries with engine room as far as possible If the tank temperature is expected to drop below 16 additional heating should be provided The recommended storage temperature is between 25 and 35 C Corrosive properties of caustic soda are aggravated at temperatures above 49 C when carbon steel is used and thus caustic soda storage should not have commo
92. n each configuration as necessary Page 9 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 4 1 2 Operation The scrubber is designed for continuous operation at full specified gas flow Main stream scrubbers are typically dimensioned for 100 engine load Typically the system is specified for following operation e Anyfuel Sulphur content up to 3 50 e Any load not exceeding the design load e Exhaust gas cleaned to a level where exhaust gas SOy emission is not exceeding an equivalent of fuel Sulphur content of 0 10 e Temporary operation without sea water cooling In such case the water consumption and the exhaust gas back pressure are higher and the exhaust gas plume is more visible The water content in the exhaust gas is higher and the risk of condensation and droplets is higher if the exhaust pipe after the scrubber is not insulated Operation at full load should be avoided without cooling water The following operation modes are not permitted e Using fuel with Sulphur content exceeding 3 50 e Exceeding the design load e Dry running of scrubber hot exhaust gases are not allowed to enter scrubber when the scrubbing water is not circulated However the scrubber can be bypassed by closing the exhaust branches to scrubber In such cases compliance with the regulations is to be achieved by using
93. n marine environment This guide is intended to give technical support in the early design phase Any data and information herein is subject to revision without notice For contracted projects specific instructions are delivered This document provides general guidance regarding scrubber onboard space reservation system and tank design and other similar issues 2 2 Scrubber types This Product Guide covers open loop sea water systems closed loop sea water systems and hybrid sea water systems Other scrubber systems are under development and will be included in the later revisions of this Product Guide 2 3 Scrubber Configurations There are four types of configurations Main Stream system Integrated System Single Venturi systems and Multiple Venturi systems All these configurations can work as open or closed loop systems and can be fitted to both new buildings and retrofit installations 2 3 1 Main stream system Scrubber unit Figure 1 Main Stream Scrubber Page 2 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Main Stream systems are designed to be installed in the main exhaust gas stream of an individual combustion unit This solution is advantageous for a range of machinery configurations for example for single main engines in ships where auxiliary generator engines and oil fired
94. n produce flammable gases when reacting with some metals e g aluminum in contact with NaOH produces hydrogen Page 80 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide e Liguid should be protected from atmospheric moisture to avoid absorption of carbon dioxide from the air air pipes etc needs to be designed accordingly e Contact with aluminum zinc brass and tin to be avoided 15 1 3 Delivery e Smaller quantities lt 5m can be delivered in containers e Typically delivered by a tank truck e Delivery to Ferry RoPax Cruise Ship e Delivery to Dry Cargo Ship Container Ship Page 81 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide e Delivery to tanker Often truck can not get close to the ship 15 2 Appendix Scrubber Nomenclature Terminology related to marine exhaust gas cleaning systems Page 82 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Absorber Term used in land based systems not in marine Aeration Process where air is mixed with water Alkali Alkaline che
95. n structures with e g heated fuel oil service and settling tanks Also other heat sources that may locally increase temperature inside the tank to exceed the afore mentioned value e g exhaust gas or steam pipes should be isolated from tank structures otorage tank heating requirement can be determined by calculating heat transfer through each tank boundary The same heat transfer coefficients through the external tank walls that are typically used for heavy fuel oil are applicable In some cases external tank insulation could be considered to reduce heat losses If heat losses from the tank are excessive heating with water circulation in carbon steel coils can be used To avoid corrosion of heating coils external surface inlet water temperature should remain below 49 For example returning LT cooling water can be utilized for heating and heating coils can be connected in parallel to the central cooler The central cooler pressure drop or a dedicated circulation pump can be used for induced circulation depending on the pressure drop in the tank heating system Coils should be installed to an approximate height of 300 mm from tank bottom and located so that thermal agitation pattern will occur Heating coils should be positioned to provide heating particularly in suction pipe area Heating coil dimensioning is based on the differential temperature At between the lower storage temperature 25 and the arithmetic mean temperature of incoming
96. n the MCP Emergency stop is hardwired from MCP Refer to el drawings and system specification for details Intrinsic Safe Panel ISP The intrinsic safe panel s purpose is to establish a boundary between a safe and a hazardous Ex area As an example there shall not be a risk of any sparks arc s in a hazardous Ex area because of a short circuit etc 13 4 2 Electrical and automation Panels Sub Supplier Continuous Emission Monitoring System CEMS The continuous emission monitoring system is a gas analyser reading SO and NOx Values sent via Modbus TCP to the control and monitoring system System layout is depending on supplier Refer to el drawings and system specification for details Scrubbing Water Monitoring Module panel SWMM Water monitoring system seawater inlet reading PAH pH Turbidity and temperature In hybrid and closed loop systems water density is included Values sent on Modbus TCP to control and monitoring system System layout is depending on supplier Refer to el drawings and system specification for details Wash Water Monitoring Module panel WWMM Water monitoring system washwater overboard discharge reading PAH pH Turbidity and temperature Values sent on Modbus TCP to control and monitoring system System layout is depending on supplier Refer to el drawings and system specification for details Page 70 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FOR
97. nal components Weight approx X kg FT 4 N LE bee ee H Figure 20 Hydrocyclone figures Page 27 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Table 9 Hydrocyclone filter assembly dimensions WW Me NE N pl DN200 DN200 DN200 DN250 DN250 ma 7 W mietpositlon 480 500 550 650 700 900 L X Weight top unt s o 75 15 M0 20 Macfowrate min 220 330 390 800 eu 890 _ Dyweghikg 350 420 500 7i5 590 1160 Wet weight kg 4 7 2 Hybrid Scrubber system The Hybrid Scrubber units are dimensioned with same sizing as Open loop and Closed loop scrubbers described previously 4 8 Insulation In normal operating conditions the scrubber unit is wet and the surface temperature is low as the scrubbing water is cooling the hot exhaust gases The only part requiring thermal insulation is the first part of the venturi s When the scrubber is not in operation the hot exhaust gases are bypassing the scrubber unit Thus the scrubber unit does not require insulation regardless of the material Exhaust gas piping before the scrubber unit and bypass arrangement will be hot when the fuel oil combustion unit is running and will require insulation to pro
98. ng of the exhaust gas and sea water Cleaned and scrubbed exhaust gas exits the scrubber vertically through the top section The scrubber should always be installed in the vertical position to ensure correct counter flow of sea water to exhaust gases 5 1 1 Main stream system A main stream scrubber serves one combustion unit only Typically this is a single inlet system but it can also be a multi inlet system in case of a very large combustion unit In many cases the main stream EGC unit does not reguire an exhaust fan but this should be verified based on back pressure limitations It could be that with complex exhaust piping or for oil fired boilers a fan will be reguired 5 1 2 Integrated system In an integrated system several combustion units are connected to one exhaust gas scrubber The 3 way bypass dampers in suction branches enable the possibility to isolate combustion units from the system for example in cases where not all combustion units are operating The correct exhaust gas flow direction is ensured with an exhaust fan which is also used to compensate the back pressure effect of the scrubber In many cases one integrated scrubber per ship is the most practical and economical solution However a configuration consisting of two integrated scrubbers may be preferred for ships with two funnels located with a distance from each other Integrated system typically consists of a multi inlet scrubber 5 1 3 Exhaust gas back pressure Th
99. ng water n Make up water Gp SR Sb Sir ip r Wash water Effluent Monitoring Bleed off Effluent Alkali am m mmm Um E pem mamam Wach water w Scrubbing water Monitoring i EEE Module Alkali Feed Module Scrubbing Water Pump Cooling Reaction OSA a amp Tw property Of VI Corponmon and X DE COGS ON WIPO Gre came 4 WARTSILA Figure 8 Hybrid Scrubber 4 4 2 Operation As the same scrubbing water pumps piping and nozzles are being used in both operation modes Open Loop mode and Closed Loop mode cannot be used simultaneously In most applications it is possible to shut off one spray nozzle layer during closed loop operation in order to save electric power used for pumping The feasibility of this operation with less scrubbing water is dependent on the actual scrubbing water pump configuration 4 5 Safety The figure below shows the principle of the exhaust gas cleaning bypass function A fail safe three way valve directs the exhaust flow to a bypass line to secure ship maneuverability also in any possible exhaust gas cleaning unit or subsystem failure scenario Page 13 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER W RTSIL W rtsi
100. on System PLC Programmable Logic Control PMS Power Management System P amp ID Piping and Instrument Diagram TD Technical Description VSD Variable Speed Drive System 13 2 General description 13 2 1 Control system philosophy The W rtsil philosophy is to make the system safe efficient and compatible regarding both the choice of equipment and the way software is developed The control system is PLC based system with distributed I O and a range of components including operator stations data logger starters and VSD and monitoring systems As internal communication W rtsil use MODBUS TCP which is both robust in relation to noise and allows multiple independent transactions a single line in addition to a large number of concurrent connections For external communication in addition to hard wire W rtsil mostly use MODBUS RS485 which makes it easy for the ship system and other subcontractors to integrate with the W rtsil Scrubber System Keeping to the regulatory reguirements according to Classification reguirements a dynamical process that W rtsil take very seriously W rtsil are in frequently contact with Classification and the system is designed with safety in mind 13 2 2 Electrical and automation panels The general approach for the automation system is to locate panels close to the main components which they control Thus troubleshooting is simplified cabling is reduced and it is simpler to develop and maintain a
101. onfiguration Refer to el drawings and system specification for details Scrubbing Fresh Water Pump starter panels SFWP1 2 Scrubbing fresh water pump starter is a DOL YD or VSD and supplies fresh water to scrubber s and vary in size and number from project to project Controlled and monitored over Modbus TCP from MCP Emergency stop is hardwired from MCP Size and layout is depending on system configuration Refer to el drawings and system specification for details Exhaust Gas Fan starter panels EGF1 2 The exhaust gas fan starter is always a VSD starter controlling the speed of the exhaust gas fan The purpose of this fan is to lower the back pressure across the scrubber particularly in the case of integrated scrubbers or scrubbers for oil fired boilers Controlled and monitored over Modbus TCP from MCP Emergency stop is hardwired from MCP Size and layout is depending on system configuration Refer to el drawings and system specification for details Deplume Air Fan starter panels DAF1 2 The deplume air fan starter is always a VSD starter controlling the speed of the deplume air fan The purpose of this air fan is to provide air to the deplume unit and to add some assistance to back pressure control Controlled and monitored over Modbus TCP from MCP Emergency stop is hardwired from MCP Size and layout is depending on system configuration Refer to el drawings and system specification fo
102. ot circulated inside the system Scrubbing water is introduced to the scrubber s via several inlets around the scrubber unit Scrubber construction is relatively similar in all open closed or hybrid scrubbers The scrubbing water flow in closed loop mode is smaller than in open loop mode Scrubbing water pumps are installed to perform the scrubbing water feed into the scrubber s The amount and size of these pumps depends from the installation and from the desired EGC operational profile Hybrid system is usually capable to use same scrubbing water pumps for both operating modes closed loop and open loop In most cases the scrubbing water pumps are variable speed driven Page 38 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 7 Sea Water Cooling System Closed Loop Exhaust gas heat is transferred to the scrubbing water and is removed in the sea water heat exchanger The purpose of the cooling is to minimize the water content in the cleaned exhaust gas after the scrubber thereby minimizing plume opacity and sea water consumption The cooling has negligible effect on Sulphur removal efficiency from the exhaust gases The system is typically designed for sea water temperature maximum of 32 C Alternatively a different temperature can be specified if reguested In cold environment minimum sea wat
103. ot dependent on sea water quality as added caustic soda NaOH works as the reacting agent Therefore sea water quality doesn t need to be monitored 8 3 UV Filter In cases where AWP water advanced water purification is used as the source of freshwater used by bleed off treatment units or droplet separator washing an UV Filter is recommended to be used to kill possible bacteria leftovers in the media Page 40 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 9 Bleed off Effluent and Sludge System Closed Loop 9 1 General To remove the accumulated impurities from the closed loop scrubbing water a small flow called bleed off is extracted from the circulation Bleed off is led to the bleed off treatment unit s BOTUs Bleed off contains traces of hydrocarbons and combustion products and pH is typically close to neutral In the treatment the bleed off is divided into effluent and sludge Clean effluent is discharged overboard or led to the effluent holding tank for a scheduled and periodical discharge Effluent quality monitoring is arranged before the discharge 9 2 DAF Bleed off treatment unit 9 2 1 Description W rtsil bleed off treatment unit is a complete system designed for cleaning bleed off from fresh and sea water scrubber s The system is fully automatic and can be also oper
104. out arrangement Black out passively stops the system and after black out the system will automatically re set the scrubber system to stop mode In case of a long black out in cold conditions the risk of too low NaOH or scrubbing water temperature needs to be noted 13 9 System interfaces 13 9 1 Common alarm The control system is provided with N C alarm contacts hardwired to the ship alarm system contact will open at e Loss of power e PLC fault e System alarms These are divided into e Critical alarm e Non Critical alarm 13 9 2 Ship control system IAS PMS GPS Reguired interface e GPS e Engine Boiler run signal e Engine Boiler load signal Optional costumer interface e Alarms e Valve positions e Values e Etc Page 76 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 10Emergency operations In an unlikely event of a total control system failure the system has to be operated manually This means local start of pumps and fans and manual override of valves 13 11 Redundancy The availability and functionality of the scrubber has no impact on the availability of the connected engine s or boiler s because redundancy is ensured either by the capability of hot running or by an exhaust gas bypass valve Therefore the scrubber and all ancillary systems are cate
105. r details Venturi Booster Pump starter panels VBP1 2 The venturi booster pump is always a VSD starter controlling the speed of the venturi booster pump The purpose of this pump is to raise water pressure in the venture to increase the particulate matter removal Controlled and monitored over Modbus TCP from MCP Emergency stop is hardwired from MCP Size and layout is depending on system configuration Refer to el drawings and system specification for details Water Monitoring Pump P 100 starter panel WMP100 The water monitoring pump P 100 starter is always a DOL Feeding the inlet water monitoring system with sea process water to ensure that the acquired measurements can be made This pump runs when the scrubbing water supply pumps runs Emergency stop is hardwired from MCP Refer to el drawings and system specification for details Water Monitoring Pump P 700 panel WMP700 The water monitoring pump P 700 starter is always a DOL Feeding the outlet water monitoring system with wash discharge water to ensure that the acquired measurements can be made This pump runs when supply or discharge pumps runs Emergency stop is hardwired from MCP Refer to el drawings and system specification for details Water Monitoring Pump P 701 panel WMP701 Page 69 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsi
106. rage capacity should be at least 1 5 times the volume of the truck It is recommended that two separate preferably adjacent structural tanks are provided for alkali This configuration would allow continuous scrubber operation during the tank surveys inspections and cleaning When tank location and volume are outlined high density of 5096 caustic soda solution and the margin against overfilling 15 2096 are to be considered Recommended cleaning interval for storage tanks is 4 years A single tank configuration can be used if operation and regulation compliance with low Sulphur fuel is a possible and feasible alternative during the above mentioned periods Due to the relatively high density of caustic soda a low center of gravity for storages may be favorable regarding vessel stability There is generally no limitation to tank geometry Tank bottom should preferably be sloped towards drain pipe Tank for 5096 NaOH should be dimensioned for specific density of 1 52t m this is to include the hydrostatic pressure head to the air vent above the bulkhead deck Tank should be externally or internally stiffened Integrity of storage tank and related air vents should be hydrostatically tested prior the tank coating Air vents need to be arranged from the highest points designed according to rules of applicable classification society General shipbuilding steels can be used for tank construction In each case when tank construction involves structural memb
107. rities separated from the bleed off form sludge in the treatment unit sludge production depending on fuel oil quality The composition of the sludge is mainly water hydrocarbons soot and metals The amount of water is aimed to be kept as minimal as possible without losing the ability to pump the mixture The scrubber sludge can generally be stored in the same tank as other engine room sludge However the current DNV regulation specifically requires separate tanks to be used for both scrubber sludge and engine room sludge Scrubber sludge is not permitted to be incinerated onboard Page 48 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 10 Alkali System Closed Loop 10 1 General Alkali is automatically added to the scrubbing water circulation to maintain the process pH and conseguently the SOx removal efficiency Typically 50 NaOH Sodium Hydroxide also known as Caustic Soda or Lye solution is used as alkali In some cases 20 NaOH solution can be considered due to its low freezing point Main components in alkali system are alkali feed module alkali transfer pump and alkali storage tank The alkali feed module consists of two chemical dosing pumps One pump is normally in operation and the other as stand by Fresh alkali is automatically fed to the process as reguired by process chemistry T
108. roplet separator and mechanical condition generally should be performed annually at which time it should be ensured that there is no damage or corrosion of the internal surfaces of the structure of the scrubber in particular in way of welded connections Any detected defects should be rectified and deposits cleaned Maintenance openings hatches with flange are provided in the scrubber unit for access The hatches are big enough for a service mechanic to climb in and transport tools and service eguipment in and out of the scrubber The droplet separator is inside the scrubber unit in sections that are installed through an opening from above Access to droplet separator from above is also preferred as the elements are inspected while walking crawling on them Depending on the scrubber type and configuration the scrubber unit may contain e g the following maintenance openings e One hatch above droplet separator e One hatch above the bottom of packing bed e One hatch above the bottom of scrubber The radial orientation can be selected freely and it does not have to be the same for each hatch Hatches at spray nozzle level can be omitted if visual view and access to nozzles can be arranged via other maintenance openings e g with scaffolds from bottom to lower stage spray nozzles or with safety harness from droplet separator level to upper stage spray nozzles Spray nozzles are inspected visually from upper hatch while spray is on with no exhaus
109. rovided at the cleaned exhaust gas outlet from the EGC unit scrubber to mix the cleaned gas and additional heated air supply to reduce the visible plume of the saturated cleaned exhaust gas Deplume Air Fan A fan provided to supply additional heated air in the deplume to reduce a visible plume from the funnel outlet Deplume Air Heater Page 83 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Heater provided to heat additional air supply for the deplume Deplume system Process of conditioning the cleaned scrubbed exhaust gas to reduce a visible plume at the funnel discharge Dissolved Air Flotation DAF Technology based on micro bubbles used to separate impurities from bleed off Droplet Separator Separates droplets of scrubber water from the gas flow inside the EGC unit scrubber Dual Water Hybrid Scrubber EGC system capable of alternating between open loop and closed loop mode and also running in a combined open and closed loop mode called hybrid mode Effluent Cleaned closed loop bleed off containing dissolved salts resulting in high density Corresponds to open loop wash water discharge EGC Unit Scrubber term used in marine systems The unit for washing SO from exhaust gas stream with scrubbing water Effluent monitoring module EMM Module provided for monitoring the quality of clo
110. rred location of the alkali feed module is near the storage tank Alkali feed module shutdown is connected to the emergency stop The module is eguipped with drip tray The drip tray drainage should be arranged with one of the following alternatives e Alternative 1 automatic guick closing valve Drip trays are to be provided at the lowest point with such a leak detector that automatically activates the NaOH storage tank quick closing valve Drip trays to be of adequate capacity to receive such leak quantity which may escape from the system prior to closing of the quick closing valve including quantity in the supply pipe Leak detection and quick closing system are to be of fail to safe type Such drip trays are without drainage Page 55 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide e Alternative 2 automatic drainage to safe tank Vertical conditions permitting drain pipes from the drip trays are to allow free flowing back to the NaOH storage tank or any other suitable tank Such drain pipes should be of adeguate size and provided with heating where necessary to avoid stiffening solidification of the caustic soda A sensor in the drip tray triggers an alarm in case of leakage e Alternative 3 alarm A sensor in the drip tray triggers an alarm in case of leakage 10 8 Alkali transfer pump Th
111. scharge water quality monitoring The OMM states all the service maintenance and calibration requirements for these essential sensors together with the component sensor part manuals These service maintenance amp calibration tasks must be performed in due time and the corresponding notes must be written in the EGC Record Book With completed records the ship is able to effectively demonstrate that the EGC system is working in compliance and that the sensor values used to determine compliance are trustworthy The OMM also states how the monitoring system surveys are to be performed EGC Record Book The EGC Record Book is a set of forms that are required to be used to log events affecting and repairs to the sensors monitoring EGC System compliance Such events are for example all the service maintenance and re calibration that is being done for the sensors listed in the OMM when wash water residues sludge is being offloaded to a port reception facility or in the case of closed loop the delivery of and consumption of chemicals for maintaining system performance e g Sodium Hydroxide Caustic Soda NaOH As an alternative to using the EGC Record Book similar log can be kept as a part of the ship s Planned Maintenance System PMS Exhaust gas declaration This document states the exhaust gas flow values from the connected engines to be used to determine EGC oystem capacity requirements Page 7 NO PART OF THIS PUBLICATION MAY BE REPRODUC
112. sed loop effluent before discharge to the sea Exhaust Gas Fan Fans installed to assist in back pressure control through the EGC unit scrubber particularly when operating integrated EGC units scrubbers and main stream EGC units scrubbers for boilers Exhaust Gas Recirculation EGR Exhaust gas recirculation for the purpose of NOx reduction of a diesel engine Flocculation A process that is often utilized in conjunction with coagulation in water separation process Colloids are collected to flocks by help of flocculants e g polymer to enhance separation efficiency Flotation Water separation technique in which light weight impurities are lifted to surface often with help of micro air bubbles see DAF and removed with weir or mechanical skimmer Flue Gas Desulphurisation FGD A term that is in general use for non marine applications more common for stationary installations Fresh Water Fresh water can be produced on board or it is bunkered from ashore Fresh water quality varies depending on its origin and suitable quality requirements have to be confirmed for each use purpose Fresh Water Closed Loop Scrubbing scrubbing process that uses fresh water not sea water and dosing of alkali to absorb SO from exhaust gas stream Fuel Oil Combustion Unit A unit as defined in the legislation such as main or auxiliary diesel engines or oil fired boilers consuming hydrocarbon fuels Heat exchanger Used for scrubbing water cooling with coo
113. system with a 4 Figure 4 Multi inlet system with venturies 1 4 naan anna aavan an una avaan maan annan nnn naan 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Figure 37 Figure 38 Figure 39 Figure 40 Figure 41 Figure 42 Figure 43 Figure 44 Figure 45 Closed loop sea water system principle diagram ara aarsrsss sa 9 Open Loop sea water system principle diagram a a rrrsrrssrss aa 11 Multi inlet SGTUDD Gl 12 M u RE 13 Exhaust gas cleaning unit in normal mode right and bypass mode left 14 saatti 16 Single entry SCUDDER 17 Double Enty EERE RE 18 IS EMT u jj aj 20 A EE 21
114. t gas and if the spray pattern is in condition there is no need to actually climb to each nozzle Welding to the structure of the scrubber body including the outside shell should not be carried out without prior consultation with Wartsila Page 78 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Outside the scrubber the access area to the hatches should be reasonable A small platform of approximately 1m in front of each hatch should be available The Continuous Emission Monitoring System CEMS needs to be checked and calibrated periodically and filters should be cleaned or replaced at prescribed intervals Hydrocyclone filters of Open Loop scrubbers require internal inspection at intervals of approximately 2 years unless the system monitoring indicates internal fouling At such time the cover should be removed after isolating the hydrocyclone from the system and individual cyclone elements removed and the stem O ring seals renewed It is essential that the complete system is shut down and isolated except where stand by components are provided and access is proven to be safe before any maintenance on the system or its components particularly those components where internal access is required is commenced This is particularly important for those systems incorporating alkali dosing Detailed ma
115. tect the hot surfaces in line with the requirements for the Protection of Hot Surfaces as detailed in SOLAS Chapter 2 regulation 4 2 2 6 All water piping exposed to cold environment should be insulated and trace heated where necessary Closed loop scrubbers with wet sump should be installed in engine casings or inside funnels to prevent under cooling of the scrubbing water in cold conditions thus eliminating a need for insulation of the scrubber body Page 28 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 5 Exhaust Gas System 5 1 General Typically the exhaust gas cleaning unit is placed in the engine casing in the funnel downstream of the silencer Exhaust gas is introduced to the system from fuel oil combustion eguipment via a 3 way bypass damper The 3 way damper is used to guide the gas flow either to the EGC unit or to the bypass All EGC unit inlets are eguipped with venturis that are connected to the lower part of the scrubber body Sea water is injected into the venturi through nozzles with the direction of the water spray being in line with the exhaust gas flow pre conditioning the exhaust gas imparting a suction effect on the exhaust gas Further scrubbing water is injected counter current to the exhaust gas flow in the main body of the scrubber at the wet filters to encourage intimate mixi
116. temperature gauge gauge with stainless steel pocket Each caustic soda storage tank should be provided with a standard 600 mm x 400 mm manhole Instead of sounding pipe an approved type local hydrostatic level indicator can be used note that devices need to be calibrated for caustic soda density Relevant classification society s rules concerning sounding requirements should be verified Page 54 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide ANTI SIPH HOLE 1 O Figure 36 Caustic soda storage tank fittings Alkali storage tank air and overflow pipe are led in similar way as normal air and overflow pipes e g above bulkhead deck and overboard To prevent spraying of alkali the air pipe end should be protected by a plate or similar means SPRAY monen A A FROM NaOH STORAGE TANK Figure 37 Example of spray protector plate for alkali storage tank air and overflow pipe 10 7 Alkali feed module Alkali feed module consists typically of two pumps In normal operating conditions one pump is in operation and the other pump in stand by The complete module includes also valves sensors and filters To prevent any splashes in case of leakages the module is eguipped with a drip tray To minimize the suction line length the prefe
117. timate mixing of the sea water and exhaust gas is arranged to ensure mass transfer of the SO content in the exhaust gas to the sea water through its natural affinity to the bicarbonate carbonate content of the sea water The open loop system is arranged as a single pass through of the sea water In other words the sea water is pumped to the scrubber where the products of combustion are absorbed this water is then treated to remove solids particulate matter from the water before the water is discharged overboard the sludge is retained on board for separate disposal 11 2 Sea water quality For all practicable purposes all naturally occurring sea water contains impurities or dissolved chemicals known as salts These salts in sea water are obtained from dissolved chemicals and sediments carried with coastal water runoff and the solvent action of sea water on the sea bed plus volcanic activity on the ocean floor These salt concentrations are affected by temperature and water exchange e g movement of water through the Danish Straights to the Baltic Sea Bicarbonate HCO3 is the key component in sea water which allows the SO absorbed in scrubbing to be buffered in the sea water This naturally occurring capacity of seawater to prevent pH of sea water becoming highly acidic through absorption of SO is the basis for sea water scrubbing In some circumstances where the buffering capacity is low in brackish or fresh water for example in the
118. ts such as silencers and or economizers in the exhaust gas system Exhaust gas inlets are arranged via a venturi or a series of venturi s sited at the side of the scrubber generally in the vertical plane but other positions can be considered during planning of the system specification and layout In multi inlet systems the system is typically provided with an exhaust gas fan while in the single inlet system the necessity of an exhaust fan is more depending on the combustion unit and the resulting back pressure of the complete exhaust piping Page 11 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide Figure 7 Multi inlet scrubber 4 3 2 Operation The scrubbers are designed for continuous operation at the full specified exhaust gas flow All scrubbers are typically dimensioned for 100 of the exhaust gas capacity of the connected machinery Where this exceeds the current design parameters for scrubbers multiple scrubbers would be specified to share the reguired gas capacity refer to section 2 6 above Typical design specification is for the following operation e Any fuel Sulphur content of up to 3 50 e Any machinery load up to design maximum load e Exhaust gas cleaned to a level where exhaust gas SOx emission is not exceeding an equivalent of fuel Sulphur content 0 10 e Continuous operation
119. ulsion and hotel power e Inport Generator engine s at highest possible relevant load In most cases the sea going conditions result in the highest possible gas flow to be used as design criteria The design conditions for integrated scrubbers should be examined case by case for accurate dimensioning Page 10 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 4 3 Single and Multi inlet open loop sea water scrubbers 4 3 1 Description The system is sea water based operating in open loop designed to use the natural buffering capacity of sea water for the removal of SOx 1 Open Loop Sea Water Scrubber mun Scrubbing water muu Reaction water mun Vash water Module mun Sludge Loi LL Optional nd Ei a Wash water TEK ee a Ze i i Monitonn Scrubbing water I rni Monitoring NO N i Wash Water Pump Scrubbing i Water Pump 1 dest SludgeTank pe Gol gt i W RTSIL TH cornet wor Of Wim Cope Kerg Or momo aft cconwet cT Figure 6 Open Loop sea water system principle diagram The scrubber can be sited in either the engine casing or funnel depending upon the space available or specific reguirements of the client downstream of other componen
120. ys T have the following characteristics Smart motor protective relay Provides Protection Monitoring and Control Control DOL YD Starters Protects against Phase Loss Locked Rotor Over Temp Monitor Voltage Current Frequency Running Time Dual Ethernet ports supporting redundant communication 13 6 Operator station Main operator station is the HMI located in MCP secondary operator station Usually in ECR Ships automation system IAS Optional by serial Modbus line pow Page 73 NO PART OF THIS PUBLICATION MAY BE REPRODUCED OR COPIED IN ANY FORM OR BY ANY MEANS WITHOUT PRIOR WRITTEN PERMISSION OF THE COPYRIGHT OWNER WARTSILA W rtsil Scrubber Product Guide 13 7 Fallback state behavior in the event of a network fault 13 7 1 Distributed IO STB 2311 The module can be configured to recognize up to three controllers as a master controller The module should continuously maintain an open connection with at least one master controller If the module loses all connections with any of the master controllers It waits a prescribed time Holdup Time for a master controller to establish a new connection with the module f no new connection is established before the timeout period expires the module sets island outputs to their fallback states Holdup Time Use the spin control to enter a value of or 300 20000 ms in increments of 10ms Default 21000 ms The Holdup Time is the period of ti

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Wärtsilä Scrubber Product Guide