PM2.5分布指数对线管式电除尘器除尘效率的影响

doi:10.11930/j.issn.1004-9649.201904096

中国电力 ›› 2019, Vol. 52 ›› Issue (10): 144-149.DOI: 10.11930/j.issn.1004-9649.201904096

PM_2.5分布指数对线管式电除尘器除尘效率的影响

张建平, 陈栋, 江泽馨

上海电力大学能源与机械工程学院, 上海 200090

收稿日期:2019-04-19 修回日期:2019-07-18 出版日期:2019-10-05 发布日期:2019-10-12
作者简介:张建平(1972-),男,博士,教授,从事电磁除尘技术、海上风力发电技术等教学与研究,E-mail:jpzhanglzu@163.com
基金资助:
国家自然科学基金资助项目（磁场环境下静电除尘器中PM_2.5捕集的多场耦合机理与PIV实验研究，11572187）

Influences of PM_2.5 Distribution Index on the Collection Efficiency of the Wire-Pipe Electrostatic Precipitator

ZHANG Jianping, CHEN Dong, JIANG Zexin

College of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China

Received:2019-04-19 Revised:2019-07-18 Online:2019-10-05 Published:2019-10-12
Supported by:
This work is supported by National Natural Science Foundation of China (Mechanism Research on the Influence of Magnetic Field and Diffusion Charging on PM_2.5 Removal Characteristics of Electrostatic Precipitator under Multi-field Coupling, No.11572187)

摘要/Abstract

摘要： 为了确定线管式静电除尘器（ESP）捕集PM_2.5性能的改善途径，需探明PM_2.5分布指数（分布指数）对ESP脱除细微颗粒PM_2.5效率的影响规律。为此，建立了多场耦合作用下的理论模型和简化模型，分别从分级效率和综合效率的角度描述了离子风、磁约束作用下EPS对PM_2.5的脱除性能。结果表明：随着颗粒粒径的减小、分布指数的降低，PM_2.5分级脱除效率会显著升高；离子风的存在提高了PM_2.5的脱除效率，但削弱了由降低分布指数给PM_2.5脱除效率带来的提升幅度；磁场有效地提升了线管式ESP对PM_2.5的捕集性能，且强化了减小分布指数对脱除PM_2.5性能的促进效果。

关键词: PM_2.5分布指数, 线管式ESP, 离子风, 磁约束, 除尘效率

Abstract: In order to figure out the way to improve the performance of the wire-pipe electrostatic precipitator (ESP) in PM_2.5 collection, it is necessary to determine the influence law of distribution index on the collection efficiency of ESP for PM_2.5 removal of slight particles. For this purpose, the theoretical and simplified models under multi-field coupling effects were established, and the dust removal performance for PM_2.5 under ionic wind and magnetic confinement was described in terms of grade efficiency and overall efficiency respectively. The results show that as the particle size decreases or the distribution index goes down, the grade efficiency of PM_2.5 will both rise significantly. The occurrence of ionic wind improves the collection efficiency for PM_2.5, which on the other hand will offset the increase of the efficiency brought by the decrease of the distribution index unfortunately. The magnetic field not only boosts the trapping performance of wire-pipe ESP for PM_2.5 effectively, but also reinforces the promotion effect of reducing the distribution index on the dust removal performance for PM_2.5.

Key words: distribution index of PM_2.5, wire-pipe ESP, ionic wind, magnetic confinement, collection efficiency

中图分类号:

张建平, 陈栋, 江泽馨. PM_2.5分布指数对线管式电除尘器除尘效率的影响[J]. 中国电力, 2019, 52(10): 144-149.

ZHANG Jianping, CHEN Dong, JIANG Zexin. Influences of PM_2.5 Distribution Index on the Collection Efficiency of the Wire-Pipe Electrostatic Precipitator[J]. Electric Power, 2019, 52(10): 144-149.

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PM_2.5分布指数对线管式电除尘器除尘效率的影响

Influences of PM_2.5 Distribution Index on the Collection Efficiency of the Wire-Pipe Electrostatic Precipitator

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PM_2.5分布指数对线管式电除尘器除尘效率的影响

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