Recent Progress of Dry Electrostatic Precipitation for PM2.5 Emission Control from Coal-fired Boilers
Y. Huang1, S. Li1, Q. Zheng1, X. Shen1, S. Wang2, P. Han2, Z. Liu1, and K. Yan1
1Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, The Institute of Industrial Ecology and Environment, Zhejiang University, PR China
2Shenhua Guoneng Energy Group Corporation Limited, PR China
Abstract- Electrostatic precipitation (ESP) is a common technology applied in fly ash control in coal-fired power plant over the world, due to its high efficiency, low pressure loss, and low maintenance cost. Since fine particle collection (PM2.5) is much harder than relative large particle, modern ESP requires excellent performance on PM2.5 collection. In this paper, not only the ESP principles and models, but also the modern techniques developed recently for ESP in PM2.5 control will be reviewed, such as electric agglomeration, flow field visualization, modern power source, moving electrode ESP and colder-side ESP. The newly developed ESP index model and its application in ESP sizing and upgrading will be introduced in detail. Besides, several advanced flue gas cleaning systems developed in the past twenty years will be presented and compared, especially for the system with colder-side ESP developed in the recent ESP upgrading activities in China.
Keywords-Electrostatic precipitation, PM2.5 control, coal-fired power plant