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MAN B&W Two-Stroke Engines - Latest Developments on Exhaust Gas Emission Control

机译:MAN B&W二冲程发动机-废气排放控制的最新进展

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摘要

This paper reviews the latest accomplishments in controlling gas emissions from large two-stroke diesel engines. During the last few decades several alternative methods have been developed, tested in service and evaluated for reduction of the exhaust gas emission. NO{sub}x emission can be reduced by Water Emulsion Fuel, High-pressure Water Injection, Exhaust Gas Recirculation (EGR), Scavenging Air Moistening (SAM), Low NO{sub}x Fuel Injectors and the Emission Mode of the ME Engine. With regard to SO{sub}x emission it can be solved by Exhaust Gas Treatment. Operation on low-sulphur fuel will also solve the problem. However, this requires special operational procedures. The HC and particulate emission is the result of an insufficient combustion process. It is preferable to trace the reasons, as the resultant heat load and contamination has a negative influence on the engine's performance.
机译:本文回顾了控制大型二冲程柴油发动机气体排放的最新成就。在过去的几十年中,已经开发了几种替代方法,在使用中进行了测试,并对减少废气排放进行了评估。可以通过水乳化燃料,高压注水,废气再循环(EGR),清除空气湿气(SAM),低NO {sub} x燃料喷射器和ME发动机的排放模式来减少NO {sub} x排放。关于SO X排放,可以通过废气处理解决。使用低硫燃料也可以解决该问题。但是,这需要特殊的操作程序。 HC和微粒排放是燃烧过程不充分的结果。最好追查原因,因为由此产生的热负荷和污染会对发动机的性能产生负面影响。

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