Gas Flow Control for the Improvement of Fine Particle Collection Efficiency on Electrostatic Precipitator

Abstract

Electrostatic precipitator (ESP) is used as a major dust collection equipment in various industries. As the environmental influence of fine particle such as PM2.5 in the atmosphere is focused recently, the improvement of the collection efficiency of fine particle on ESP is desired. The collection efficiency of ESP is affected by dust properties such as particle diameter and the electric resistivity of the dust. In this study, a fine particle collection efficiency of ESP and an improvement method of the separation characteristics of fine particle by gas flow control on ESP in a pulverized coal combustion boiler is investigated. It is estimated that the control of gas flow pattern in ESP is one of the effective method for improvement of ESP.