增强PM_(2.5)脱除的新型电除尘技术的发展  

Development of Advanced Electrostatic Precipitation Technologies for Reducing PM_(2.5) Emissions From Coal-fired Power Plants

作　　者：熊桂龙[1] 李水清[1] 陈晟[1] 张绪辉[1] 姚强[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京市海淀区100084

出　　处：《中国电机工程学报》2015年第9期2217-2223,共7页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2013CB228506);国家高技术研究发展计划项目(863计划)(2013AA065004)~~

摘　　要：静电除尘器已广泛应用于工业除尘领域,其对粗颗粒收集效率高达99.9%以上,但在PM2.5范围内存在穿透窗口,难以满足日趋严格的烟气污染物排放环保标准。文中介绍了3种发展的电除尘新技术——低低温电除尘器、湿式电除尘器和电袋除尘器,分别采用实验与理论分析的方法对3种电除尘器的脱除机理与脱除性能及在国内外燃煤电站的应用情况进行了探讨,结果表明,电除尘新技术可有效控制PM2.5的排放,达到粉尘低于20 mg/m3排放的目标,并可实现SO3酸雾及汞等重金属排放的协同控制。The Electrostatic Precipitator （ESP） has been used widely in coal-fired power plants and other industrial plants. Although the collection efficiency of ESP higher than 99.9% for coarse particles, it exhibits relatively low performance in capturing of fine particles （PM2.5）, in which a penetrating window exists in the range of 0.1-1.0μm. Therefore, several technologies, including extra cold-side ESP, wet ESP and hybrid ESP/BAG device, have been developed for the efficient removal of PM2.5 to meet the increasingly strict emission standards. In this paper, the removal mechanisms and performances of these three kinds of new emerging technologies, which are all on the basis of ESP principle, were analyzed and tested by the experimental and theoretical investigations. Furthermore the comparisons on the practical applications in coal-fired power plants were discussed. The results indicate that the synergetic capture of PM2.5, SO3 acid mist and even mercury can be effectively achieved by employing the single or coupled approach of these three new technologies.

关 键 词：PM2.5 静电除尘器 低低温电除尘器 湿式电除尘器 电袋复合除尘器 

分 类 号：X51[环境科学与工程—环境工程]