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Effects of Temperature on Electrostatic Precipitators of Fine Particles and SO3

Category: Technical Note

Volume: 18 | Issue: 11 | Pages: 2906-2911
DOI: 10.4209/aaqr.2018.05.0196

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Haibao Zhao 1, Yuzhong He1, Jiadong Shen2

  • 1 Zhejiang Feida Environmental Science and Technology Co., Ltd., Zhuji 311800, China
  • 2 Tongji Zhejiang College, Jiaxing 314051, China


The removal efficiency of SO3 achieve 73% when gas temperature decreased to 90°C.
PM1 concentration decrease from 0.5 to 0.17 mg m–3 as gas temperature drop to 90°C.
The mechanism of fly ash adsorption SO3 and fine particle change is proposed.


The fine particles and SO3 at the outlets of electrostatic precipitators (ESPs) were measured when the temperature of the flue gas decreased to 90°C on a pilot-scale platform with 50,000 m3 h–1 of real flue gas. Based on the test results and scanning electron microscopes (SEMs) of the particulate matter, the mechanism of fine particle change and SO3 removal was analyzed. The results show that the efficiency of SO3 removal reaches 73% and the penetration concentration of PM1 decreases from 0.5 to 0.17 mg m–3 when the gas temperature decreases from 120–130°C to 90–95°C in a coal-fired power plant.


Coal-fired power plant Dust emission Electrostatic precipitator SO3 PM

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