Abstract：In order to study characteristics of particle collection in a large-flow and high-temperature flue gas with a wide-space electrostatic precipitator (ESP), a pilot-scale high-temperature ESP was designed and built based on the CFB boiler pilot test platform. The characteristics of particle collection were tested in the high-temperature ESP with 300mm plate-plate distance at the maximum temperature of 1020K and the influence of key factors such as discharge voltage, temperature and gas velocity on the particle collection was obtained. The experimental results show that the collection efficiency was 82.2% when the gas velocity was 0.3m/s and the temperature was 1020K, which confirmed efficient particle removal for the actual high-temperature flue gas. Through the comparison of the hot test (from 563K to 1020K) and the cold test (ambiance), the particle collection efficiency decreased rapidly with the increasing temperature, which was related to the gas velocity increasing, discharge voltage decreasing and gas viscosity increasing at high temperature.
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