Charging and absorption characteristics of small particulates under alternative and electrostatic voltages in an electrostatic precipitator  

作　　者：姜学东 徐鹤 王昕 

机构地区：[1]School of Electrical Engineering, Beijing Jiaotong University

出　　处：《Chinese Physics B》2014年第12期324-328,共5页中国物理B（英文版）

基　　金：Project supported by the National High Technology Research and Development Program of China(Grant No.2004AA52930);the Fundamental Research Funds for the Central Universities(Grant No.2014JBM109)

摘　　要：The charge quantity of small particulates such as PM2.5 plays a key role in the collection efficiency of an electrostatic precipitator（ESP）. Under a single electrostatic voltage, it is difficult to charge and absorb small particulates. A new method of superimposing an alternative voltage on the electrostatic voltage is provided in this paper. Characteristics of small particulates are analyzed under alternative and electrostatic voltages. It is demonstrated that an alternative voltage can significantly improve the collection efficiency in three aspects： preventing anti-corona, increasing the charge quantity of small particulates, and increasing the median particulate size by electric agglomeration. In addition, practical usage with the superposition of alternative voltage is provided, and the results are in agreement with the theoretical analysis.The charge quantity of small particulates such as PM2.5 plays a key role in the collection efficiency of an electrostatic precipitator（ESP）. Under a single electrostatic voltage, it is difficult to charge and absorb small particulates. A new method of superimposing an alternative voltage on the electrostatic voltage is provided in this paper. Characteristics of small particulates are analyzed under alternative and electrostatic voltages. It is demonstrated that an alternative voltage can significantly improve the collection efficiency in three aspects： preventing anti-corona, increasing the charge quantity of small particulates, and increasing the median particulate size by electric agglomeration. In addition, practical usage with the superposition of alternative voltage is provided, and the results are in agreement with the theoretical analysis.

关 键 词：charged characteristics ANTI-CORONA electric agglomeration alternative voltage 

分 类 号：X701.2[环境科学与工程—环境工程]