Yoshihiko Mochizuki

Recent Application and Running Cost of Moving Electrode type Electrostatic Precipitator

Advantages of a moving electrode type electro-static precipitator (ESP) and the present supply record are described briefly. The latest gas treatment system for a coal fire power station consists of a moving electrode type ESP, a DeSO x system and a wet ESP in Japan. The gas temperature of the moving electrode type ESP is 80 deg-90 deg. Celsius. This system can reduce outlet dust concentration to less than 1 mg/m3N and outlet sulfuric acid mist to less than 0.1 ppm. The running cost of a moving electrode type ESP was studied using actual operation results. Maintenance and repair cost of a moving electrode type ESP accounts for 10%–12% of the running cost. That is almost the same as the maintenance and repair cost of a fixed electrode type ESP. The total cost of the moving electrode type ESP including facility and running cost is cost effective compared to a fixed electrode type ESP.