1. A Practical guide to wartsila scrubber systems
BIMCO 2nd of june 2015
Stian Aakre
A Practical Guide to Scrubber Systems/ Stian Aakre

2. Marine Sulphur and Scrubber legislation
Body
Act
IMO - SOx
MARPOL Annex VI
IMO - Scrubbers
Resolution MEPC.184(59) EU
2012/33/EU
US EPA
Vessel General Permit – VGP
California Air Resources Board - CARB
2015
2020
2025
Presentation name / Author

3. Wärtsilä Marine Scrubber Portfolio
Open loop scrubber – sea water operations
Uses seawater i.e. no freshwater needs
Slightly higher power demand than FWS
Does not need caustic soda
Applications: main alternative for ocean-going ships
Closed loop scrubber – fresh water/closed loop operations
Independent on seawater alkalinity
Zero effluent discharge an option
Low power demand
Needs caustic soda as a reagent
Applications: seas with extremely low alkalinity and for operators looking for continuous closed loop operation
Hybrid scrubbers – open loop / closed loop operations
Flexible system
More complex system
Applications: ships requiring full flexibility of operations
Presentation name / Author

4. Meet IMO Tier III with Wärtsilä NOx Reducer
Easy, proven and safe add-on technology
Comply with NOx emission regulations - IMO Tier III, US-EPA, local requirements
Future-proof global operation
Allow flexible installation
Gain OPEX savings for engine + SCR integration
Comply with Wärtsilä Scrubbers and HFO up to 3,5% Sulphur
2015
Wärtsilä NOx Reducer

5. Wärtsilä Marine Scrubber Portfolio
Presentation name / Author

6. Open loop vs hybrid vs closed loop
Presentation name / Author

7. Open loop vs hybrid vs closed loop
Presentation name / Author

8. Inline vs conventional scrubber
Inline scrubber
Conventional scrubber
Wash water amount
55 m3/MWh
45 m3/MWh
Max fuel S% content in open loop
2,5%
3,5%
PM removal No
Up to 85%
Benefits inline scrubber:
Smaller footprint and operational flexibility
The main stream configuration provides good redundancy
No by-pass and simple installation
Reference inline scrubber
First installation: Color Line Super Speed 2 in operation
Similar installations for 3 other Color Line vessels
11 Inline scrubbers (hybrid) ordered for cruise vessels
4 Inline scrubbers (closed loop) ordered for two RoRo vessel

9. 𝑆 𝑓𝑢𝑒𝑙 →𝑆𝑂2 𝑒𝑥ℎ𝑎𝑢𝑠𝑡 𝑔𝑎𝑠 →𝑆𝑂4 (𝑑𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑤𝑎𝑡𝑒𝑟)
Sulphur in sea
𝑆 𝑓𝑢𝑒𝑙 →𝑆𝑂2 𝑒𝑥ℎ𝑎𝑢𝑠𝑡 𝑔𝑎𝑠 →𝑆𝑂4 (𝑑𝑖𝑠𝑐ℎ𝑎𝑟𝑔𝑒 𝑤𝑎𝑡𝑒𝑟)
Sulphur oxides
SOx in sea water (scrubbing process) forms sulphuric acid – low pH
Sea water alkalinity
neutralizes the pH – rest “product” from scrubbing is sulphate
Sulphate
is a natural substance in sea water - approximate amount: mg/l

10. Water treatment and sludge
All Wärtsilä scrubber systems have water treatment included as a default.
The goal is to always follow current and future legislation, guaranteeing
compliance for our customer.
To be disposed of ashore
Estimated amount:
Closed loop: 1,0 kg/MWh
Open loop: 0,05 kg/MWh
The amount depends on silt content in water and engine running profile

11. Deplume

12. Case study: Superspeed II
ColorLine SuperSpeed II:
Operates 100% within SECA
4 x 9,45MW Wärtsilä
Space limitations in funnel
Wärtsilä Inline Scrubber installation March 2014 at FaYard
Based upon our investigations we needed to find an EGC system with scrubbers that could be fitted into the existing engine casing ColorLine

13. Case study: Superspeed II
Replacing the silencers with Wärtsilä Inline scrubbers
Funnel with silencers

14. Wärtsilä – added value partnership
Summary
Technology choice to suit the ship type and operational profile
Turn-key supply capability
trusted partnership
survey and equipment selection
engineering and project management
procurement and equipment delivery
installation, commissioning and certification
through life technical, spares and service support
Credible supplier to the marine and offshore sector
Proven global support capability