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柴油机排放中最主要的2种污染物是微粒(PM)和氮氧化物(NO_x)。从目前降低排放的技术途径来看,大致上有选择性催化还原(SCR)和废气再循环(EGR)2种净化技术。1.选择性催化还原技术应用选择性催化还原技术(SCR)的前提条件是柴油机通过超高压喷射和优化燃烧技术,使燃油燃烧后只生成极少数微粒(PM)。在此基础上,再应用选择性催化还原技术(SCR),以降低
The two main pollutants in diesel emissions are particulate (PM) and nitrogen oxides (NOx). From the current technical approaches to reducing emissions, there are generally two types of purification technologies, selective catalytic reduction (SCR) and exhaust gas recirculation (EGR). 1. Selective catalytic reduction technology Selective catalytic reduction (SCR) preconditions are diesel engines that generate only a very small number of particles (PM) after they are combusted by ultra-high pressure injection and combustion optimization. On this basis, then apply selective catalytic reduction (SCR) to reduce