Development and Application of PM2.5 Trapping and Removal Device Based on Turbulence Coupled with Bipolar-charged Particle Coagulation

doi:10.11930/j.issn.1004-9649.201711003

Abstract

Abstract: Regarding the technical bottleneck as difficulty in PM_2.5 particle charging in conventional electrostatic precipitator (ESP), the particle coalescence technique based on turbulence coupled with bipolar-charged mechanism can promote the PM_2.5 coalescence economically and efficiently, which is of great help for ESP to remove PM_2.5 effectively. Apparently it has the highest engineering application value among a variety of particle coalescence technologies. In this paper, the structural optimization of gas duct PM_2.5 trapping and removal device are carried out, then the key components structure and the main parameters of bipolar charged area and turbulent aggregation area are determined. The total flue dust can be reduced by 20.3%, and PM_2.5 emissions can be reduced by 30.1%. In addition, the PM_2.5 trap synergistic device are developed and the best mixing scheme for bipolar charged particles are determined. The total dust can be reduced by 17.3%. After coupling with low-low temperature electrostatic precipitators with rotating electrodes, PM_2.5 can be reduced by 37%. The multi-clock arrangement and combination mode can flexibly adapt to the different requirements of the actual engineering conditions, and meet the urgent requirements of environmental protections for PM_2.5 management of coal-fired power plants.

Key words: coal-fired Power, ESP, PM_2.5, particle coalescence, bipolar-charged, turbulence

CLC Number:

X773
TM621

LI Ning, YUAN Weifeng, LIU Hanxiao, ZHAO Lin, XU Dongxu, LUO Jianyou, GUO Ying. Development and Application of PM_2.5 Trapping and Removal Device Based on Turbulence Coupled with Bipolar-charged Particle Coagulation[J]. Electric Power, 2018, 51(6): 17-25.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201711003

https://www.electricpower.com.cn/EN/Y2018/V51/I6/17

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Development and Application of PM_2.5 Trapping and Removal Device Based on Turbulence Coupled with Bipolar-charged Particle Coagulation

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