Improve Device for Removing Particle Matter from Marine Engine Exhaust Gas
September 14, 2007
Monohakobi Technology Institute (MTI; head office: Tokyo; president: Yutaka Yasunaga), has applied along with Daiwa Kogyo Co. Ltd. (head office: Amagasaki City, Hyogo; president: Kenji Nakajima) for a patent on a newly developed device for removing particulate matter (PM) from the exhaust gas of generators powered by diesel engines. Shipboard diesel-powered generators provide power for ship operations and cargo handling. This newly developed device removes PM contained in the exhaust gas emitted by the generators.
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 Co. Ltd. (head office: Tokyo; president: Takamichi Kawakami).
The new PM-removing device also has an improved internal structure, making the device more compact, and reduces PM emissions from burning class-C heavy oil, which is 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 cleaning of dust-collecting filters has also been automated in the device, effectively reducing maintenance time.
NYK and Monohakobi Technology Institute will continue to proactively pursue new technologies for its carriers, and strive to continue to develop advanced environment-friendly technologies.
- * Class-C heavy oil is used in diesel generators on board vessels. Oil is classified into three classes, A to C, based on increasing viscosity, with class C having the highest viscosity. Class-C oil is mainly used in shipboard diesel engines or power generators.
- ** Established in 1968, the Environmental Quality Standards for Air Quality apply to five kinds of pollutants from land-based equipment: soot/smoke, volatile organic compounds, dust, hazardous air pollutants, and car exhaust emissions.
Summary of PM-removing device
| Specification | for class-C heavy oil (380 cSt) and 1,200 kW class diesel-powered generators |
|---|---|
| Treatment capacity | approximately 8000 Nm3/hr for each of the two devices |
| Dimensions | 1,300 mm (approximate width) X 1,200 mm (approximate length) X 2,600 mm (approximate height) |
| Capacity for removing PM | reducing the density of particle matter (PM) within exhaust gas to 0.03~0.04 g/m3N |
Appearance
Left, device installed in March 2003 for test trial (for 800 kW class diesel-powered generators) Middle, PM-removing device installed in 2006 (able to dispose of emission gases generated from one 1,200 kW class diesel generator) Right, improved PM-removing device this year (one device can dispose of the emission gases generated by two 1,200 kW class diesel generators)
Inquiries may be directed to the following individuals:
- Masaya Sato
- Daiwa Kogyo Co. Ltd.
Address: 3-11-21 Tsugiya Amagasaki-shi, Hyogo, 661-0965 Japan
Tel: +81-6-6499-3428; Fax: +81-6-6499-2336
E-mail: sato@dkc-japan.com - Kazuhito Ikeda
- Monohakobi Technology Institute (MTI)
Address: 2-3-2 Marunouchi, Chiyoda-ku, Tokyo, 100-0005 Japan
Tel: +81-3-5222-7696; Fax: +81-3-5222-7680
E-mail: kazuhito_ikeda@monohakobi.com
