Mitsubishi joins scrubber club with first installations

Mitsubishi joins scrubber club with first installations

Malcolm Latarche

Malcolm Latarche · 06 February 2020


Japanese shipbuilder and marine equipment manufacturer Mitsubishi Shipbuilding has reported that it has successfully installed its first two exhaust gas cleaning systems with its DIA-SOx R series fitted to two container vesels.

The first two units of the scrubber were retrofitted onboard ultra-large container ships of 20,000teu and 14,000teu capacity and received approvals from classification societies, Lloyd's Register and ClassNK and consequently from the Panama and Singapore as the flag states involved.

The two units were tested and proved to remove at least 97% of the SOx content from the exhaust gas meeting the requirements for equivalence to using 0.1% sulphur fuel.

The DIA-SOx R series was jointly developed by Mitsubishi Shipbuilding and Mitsubishi Hitachi Power Systems, (MHPS). Its rectangular tower design is claimed as the most suitable for ultra-large container ships, and its multi-stream configuration can simultaneously treat with a single tower, exhaust gas discharged from multiple engines, including main engines with outputs over 75,000kW. Moreover, its simplified configuration helps the ship crews to conduct the maintenance work easier.

For the drydock installations on the two vessels, Mitsubishi Shipbuilding and MHPS jointly dispatched professional teams in parallel to a repair yard located in Zhoushan, China, and completed the commissioning work in five days. Much smoother and shorter than originally planned through collaboration with the ship owner, the yard and the classification societies despite the congested site condition.

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