高比阻荷电粉尘反电晕现象的机理分析

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英文篇名：Mechanism Analysis on Back Corona of High Specific Resistance Charged Dust 作者：段大卫 ; 冯德仁 英文作者：DUAN Da-wei;FENG De-ren;Chuzhou University;College of Electrical & Information Engineering Anhui University of Technology; 关键词：反电晕 ; 荷电粉尘 ; 群聚 ; 空间电荷效应 英文关键词：back corona;;charged dust particles;;bunching;;space charge effect 中文刊名：JMDB 英文刊名：Journal of Jiamusi University(Natural Science Edition) 机构：滁州学院;安徽工业大学; 出版日期：2018-09-15 出版单位：佳木斯大学学报(自然科学版) 年：2018 期：v.36;No.156 语种：中文; 页：JMDB201805016 页数：4 CN：05 ISSN：23-1434/T 分类号：56-59

摘要

在采用高压直流供电的工业电除尘器中,当粉尘颗粒为高比电阻的粉尘进入强场荷电后到达正电的收尘极板时,易形成负电粉尘层吸附在收尘极板上,不易被振打装置清除形成的反电晕现象。分析了高比电阻的粉尘吸附在收尘极板上极板附近电位和附加反向电场的时间变化趋势,建立了电极中荷电粉尘运动方程,进行了多粒子轨迹模拟,结果表明,由于附加反向电场的存在,部分高比电阻的粉尘将无法到达集尘极,据此分析了反电晕现象的原因并且提出了一种解决方案。
        When high specific resistance dust particles are charged after entering strong electric field and then arrive positively charged dust collecting plate,it is easy to happen to the back corona phenomenon in a high-voltage DC power supplied industrial electrostatic precipitator. The formative reason of such a phenomenon is that the negatively charged dust particles adsorb on the dust collecting plate and not easy to be cleared by rapping device. In this paper,a dynamic model of charged dust particles in electrode is established,and a motion equation of charged dust particles is derived when space charge effect exists. The results show that the charged dust particles cannot reach the dust collecting electrode when certain conditions are satisfied in the presence of space charged effect. Based on the results,the causes of the back corona phenomenon are analyzed and the corresponding solutions are proposed.

引文

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