Mitsubishi Shipbuilding completes 22 scrubber retrofits

Mitsubishi Shipbuilding completes 22 scrubber retrofits
Arrangement of a scrubber onboard a 14,000 TEU container ship (left), and exterior after installation (right)

Mitsubishi Shipbuilding’s marine sulphur oxides (SOx) scrubbers have been successfully installed on 22 ships across three ship types during the last 8 months.

The DIA-SOx scrubbers have been installed as scheduled despite COVID-19 restrictions. Remote commissioning conducted via close communication and cooperation with the engineers of its local partners in China and Singapore respectively enabled Mitsubishi Shipbuilding to continue with the planned installations.

Mitsubishi Shipbuilding is part of the Mitsubishi Heavy Industries (MHI) Group.

The line-up of DIA-SOx consists of the R Series and C Series. The rectangular tower design of the R Series is the most suitable for container ships and its multi-stream configuration can simultaneously with 1 tower treat exhaust gas discharged from multiple engines, including the large main engine.

The simplified configuration enables ship crews to easily conduct maintenance work.

The C Series with cylindrical tower design also utilises the multi-stream configuration, offering high flexibility that can be easily installed onboard various types of the ships.

Mitsubishi Shipbuilding also provides retrofit engineering for installation of both types of scrubbers.

For 14,000 TEU container ships for which Mitsubishi Shipbuilding provided engineering services as well as the scrubber retrofit, the scrubber tower was installed in the built-in casings on the port side of the existing funnel. The scrubber system was installed without reducing container loading capacity, which is one of the advantages of the rectangular tower shape of the R Series.

Following sea trials, the scrubber retrofits were approved by ClassNK, Lloyd’s Register (LR), American Bureau of Shipping (ABS), and other classification societies.