Wärtsilä Awarded TT-Line Exhaust Gas Cleaning Retrofit

Posted by Eric Haun
Wednesday, November 13, 2013
M/S Robin Hood

Wärtsilä has been contracted by German-Swedish ferry operator TT-Line to retrofit an exhaust gas cleaning system to its Ro-Pax vessel, the M/S Robin Hood as part of TT-Line's Green Ship strategy. The full turnkey project will be managed by Wärtsilä thereby minimizing downtime and risk, while guaranteeing performance and regulatory compliance. The contract was signed in October 2013, and delivery and installation will take place during summer 2014.

The vessel will be fitted with four Wärtsilä Hybrid Scrubber Systems designed to reduce harmful sulphur oxide (SOx) and particulate emissions from the ship's exhaust. The ferry operates in the Sulphur Emission Control Area (SECA) between Travemünde, Germany and Trelleborg, Sweden. The Wärtsilä systems will enable compliance with the SECA regulations, as well as with anticipated future legislation.

Wärtsilä's turnkey delivery responsibility covers full engineering, prefabrication, installation, classification, project management, and construction site management.

Hannes Conzen, CEO of TT-Line, said, “The retrofit project is cofinanced by the European Union through the TEN-T MOS ‘Green Bridge on Nordic Corridor’ project.”

"This is the first retrofit project for a large Ro-Pax ship where we are taking the full Engineering Procurement and Construction responsibility," said Leonardo Sonzio, Director, Retrofit, Environmental Solutions, Wärtsilä Ship Power.

The system operates in either an open loop or closed loop mode using seawater to remove SOx from the exhaust. When operating in open loop, exhaust gases enter the system and are sprayed with seawater. The sulphur oxides in the exhaust react with the water to form sulphuric acid. Chemicals are not required since the natural alkalinity of seawater neutralizes the acid. When operating in closed loop, the natural alkalinity of seawater is boosted by an alkali.

Wash water from the system is treated and monitored at the inlet and outlet to ensure that it conforms to all applicable discharge criteria. It can then be discharged into the sea with no risk of harm to the environment.

wartsila.com
 

  • Wärtsilä Hybrid Scrubber System

    Wärtsilä Hybrid Scrubber System

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