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.
作者
段大卫
冯德仁
DUAN Da-wei;FENG De-ren(Chuzhou University,Chuzhou Anhui 239000,China;College of Electrical ＆ Information Engineering Anhui University of Technology,Ma＇anshan,Anhui 243002,China)
出处
《佳木斯大学学报（自然科学版）》
CAS
2018年第5期714-717,共4页
Journal of Jiamusi University：Natural Science Edition
关键词
反电晕
荷电粉尘
群聚
空间电荷效应
back corona
charged dust particles
bunching
space charge effect
