船舶柴油机颗粒物捕集及再生试验

Experiment on PM Capture and Regeneration for Marine Diesel Engine

颗粒物捕集器(Diesel Particulate Filter,DPF)是应对柴油机颗粒物(Particulate Matter,PM)排放的有效工具,针对某型船用发动机,设计DPF和不同的PM再生方式,对DPF的PM捕集效率和再生性能进行试验测试。结果表明:该型DPF对船舶柴油机在不同工况下的PM排放均有较高的捕集效率,达到90%以上,但会造成柴油机排气背压和油耗升高;采用贵金属催化剂和非贵金属催化剂涂层均可降低PM的纯被动再生活性温度,实现有效再生,但贵金属催化剂结合抗硫涂层的耐硫性能优于非贵金属催化剂;采用燃烧器主动再生装置提高柴油机烟气温度可有效实现DPF再生,再生效率和再生程度较高。根据试验结果对船舶柴油机匹配DPF及其再生系统提出建议,为DPF的实船应用提供参考。

Diesel Particulate Filter(DPF)is an effective device to deal with the Particulate Matter(PM)emission of diesel engine,so a DPF system and several regeneration methods are designed for a type of marine engine,and the capture efficiency and regeneration performance of the DPF system are studied on the test bench.The result shows that the DPF system has high PM capture efficiency under various working conditions,with an average over 90%,but the exhaust back pressure and fuel consumption of diesel engine are increased due to the installation of the DPF system.The coating of the noble metal catalyst and base metal catalyst can reduce the active temperature of pure passive regeneration and realize the effective regeneration of PM,but the durability of noble metal catalysts is better than that of the base metal catalysts.However,the burner device can improve the exhaust gas temperature and achieve PM regeneration completely with high regeneration efficiency.Some suggestions are provided on the application of DPF device and regeneration system to marine diesels according to the test results,providing reference for the real application of DPF device on marine ships.