Tokyo: NYK affiliate Monohakobi Technology Institute has applied for a patent in conjunction with the with Daiwa Kogyo company for a newly developed device for removing particulate matter (PM) from the exhaust gas of generators powered by diesel engines. The new device (pictured) is more compact, and reduces PM emissions from burning class-C heavy oil (typically used in marine engines) to less than 40 percent of previous levels -the target set in Japan by the Environmental Quality Standards for Air Quality. The device also boasts automated cleaning of dust-collecting filters that effectively reduces maintenance time.
The existing device was improved through extensive shipboard performance tests in 2003 on 800 kW class diesel-powered generators installed on NYK's car carriers, and tests in 2006 on 1,200 kW class diesel-powered generators installed on two newly built car carriers. The company also conducted a duration test on the disposal of exhaust gas from burning class-C heavy oil.
The newly improved PM-removing device, which removes twice as much PM from gas emissions as the conventional device, will be installed on two new car carriers to be completed in September and October by Shin Kurushima Dockyard. [20/09/07]
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