化工进展2018，Vol.37Issue(6)：2413-2425,13.DOI:10.16085/j.issn.1000-6613.2017-1773
电除尘器飞灰粒径表征及细颗粒降温团聚
Fly ash particle characterization of electrostatic precipitators and cooling agglomeration for fine particles
摘要
Abstract
Based on the 50000m3/h actual flue gas pilot test system,the Mastersizer 2000E laser particle size analyzer and electrical low pressure impactor(ELPI)were used to fully characterize the geometric particle size and aerodynamic particle size of the fly ash particles of the electrostatic precipitator(ESP)for the first time. Results showed that,the geometric size distribution of fly ash particles of ESP inlet and different electric field is bimodal distribution characteristics,which moves to the right in turn,but particles ≤1μm at the end of rotating electrode electric field have a slightly higher,the fly ash particle geometric median diameter of ESP inlet and 1—5 electric field were 6.607μm,17.378μm,2.884μm,2.577μm,2.460μm,2.480μm,respectively. The fly ash particles geometric size distribution bimodal of ESP inlet moves to the right when temperature was reduced, particle agglomeration phenomenon was obvious,the fly ash particle geometric median diameter of 80℃,90℃,110℃,130℃,150℃ for ESP inlet were 13.183μm,10.500μm,10.171μm,6.607μm,7.586μm,from 130℃ to 90℃,particles ratio of ≤1μm,≤2.5μm,≤10μm decreased by 19.8%, 19.8% and 19.8% respectively. At different temperatures,the ESP collection efficiency of number and mass concentration for aeordynamic diameter 0.03μm to 10μm,which were all higher than 75%,and the highest was up to 99.9%. The number and mass concentration for different period of aerodynamic diameter reduced obviously,from 130℃ to 90℃ and 80℃,the PM2.5agglomeration efficiency of mass concentration for ESP inlet were 46.76% and 46.76% respectively. The PM10reduction efficiency of mass concentration for ESP outlet were 59.80% and 91.08%. PM2.5reduction efficiency were 45.94% and 76.22%. PM1reduction efficiency were 40.40% and 62.12%,respectively.关键词
低低温电除尘器/PM2.5/降温团聚/粒度分布/除尘效率Key words
low-low temperature electrostatic precipitator/PM2.5/cooling agglomeration/particle size distribution/collection efficiency分类
资源环境引用本文复制引用
刘含笑,郦建国,姚宇平,何毓忠,陈招妹,王鹏..电除尘器飞灰粒径表征及细颗粒降温团聚[J].化工进展,2018,37(6):2413-2425,13.基金项目
国家重点研发计划(2017YFB0603202)及国家重点研发计划(2016YFC0203704). （2017YFB0603202）
