One Scrubber for all Main and Auxiliary Engines

By Peter Pospiech at July 25, 2013 06:07
Filed Under: Company News, Scrubbers

Norway's Clean Marine says it offers a patented exhaust gas cleaning system (EGCS) to meet upcoming regulations on sulphur emissions. "For vessels sailing in European waters and other emission control areas (ECAs), a maximum sulphur limit of 0.1% will apply from 2015," said CEO Nils Hoy-Petersen. "The Clean Marine system will clean both sulphur oxides (SOx) and particulate matter emissions from main and auxiliary engines as well as boilers." The EGCS is said to be the only system currently on the market with true multi-stream exhaust gas handling. This means that all exhaust sources on board are served by one common EGC unit without encountering an increase in back pressure, Clean Marine said. In addition the system can be retrofitted and installed, with slight modifications, in the existing funnel design. 

Two fans and a gas recirculation mechanism integrated into the EGC unit ensure that pressure at the common gas-meeting point is maintained at ambient level, irrespective of the amount of exhaust fed to the system.

The advanced vortex chamber (AVC) is another vital part of the Clean Marine EGC unit. This high-speed cyclone has outstanding separation efficiency and achieves a high sulphur and particulate matter (PM) trapping efficiency at minimum cost, according to the company.

Clean Marine says it offers a proven, hybrid system that can operate in both open-and closed-loop mode. It uses caustic soda in both modes, which means vessels can operate in all types of water (including low-alkaline and saline water) in either mode and without loss of efficiency. Furthermore, the use of caustic soda enables the Clean Marine EGCS to meet the current pH limit for washwater discharges with good margin, it noted.

The Clean Marine EGCS is easy to operate and monitor and is also a cost-efficient option, especially for vessels with many exhaust sources, as the one EGC unit simultaneously serves several combustion units.

Assuming a conservative USD 300 per metric tonne price difference between marine gas oil and high sulphur fuel oil, and 100% of operations inside an emission control area (ECA), Clean Marine says payback time would be about a year.

A Clean Marine EGCS is operational and fully certified on the bulk carrier M V Balder, and the company recently signed a contract with Samsung Heavy Industries and AET for two shuttle tanker newbuildings. Installation of the EGC units is scheduled to take place during 2013 and 2014, and Samsung will deliver the state-of-the-art tankers at the end of 2014 and beginning of 2015, respectively.

 

Graphics: courtesy of Clean Marine

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