Influence of Operation Temperature on Performance of Electrostatic Precipitator for Pulverized Coal Combustion Boiler

Electrostatic precipitator (ESP) is a major dust collection technology for pulverized coal combustion boilers in Japan. Although the collection efficiency of ESP is over 99%, the performance of ESP is affected by dust properties, especially by the electric resistivity of dust. In Japan, many kinds of coal are imported from countries overseas and used in pulverized coal combustion boiler. The property of coal ash formed by the pulverized coal combustion is different by coal species. It is very important to develop a high performance electrostatic precipitator for various types of coal ash. In this paper, the influence of operation temperature from 363K to 623K on the performance of ESP for pulverized coal combustion boiler is investigated, and the relationship between the coal ash property including electric resistivity and alkalic metal concentration and the collection efficiency of ESP is obtained.