横向双极静电除尘器空气动力增效  

Aerodynamic Enhancement of Bipolar Transverse Plate Electrostatic Precipitator

作　　者：贾沛[1] 吴燕玲[1] 吝曼卿[1] 邱丹丹[1] JIA Pei;WU Yan-ling;LIN Man-qing;QIU Dan-dan(School of Resources and Safety Engineering,Wuhan Institute of Technology,Wuhan 430073,China)

机构地区：[1]武汉工程大学资源与安全工程学院,武汉430073

出　　处：《科学技术与工程》2023年第13期5793-5798,共6页Science Technology and Engineering

基　　金：2021年度湖北省教育厅科学研究计划指导性项目(B2021082);国家自然科学基金(52174085)。

摘　　要：为明确横向双极静电除尘器的空气动力增效机理,基于电除尘器的经典效率公式研究了空气动力对横向双极静电除尘器除尘效率的影响。数值模拟结果表明:横向双极电除尘器内荷电粒子的驱进速度是电场驱进速度与空气动力驱进速度之和。极板迎风面的空气动力增效幅度强于背风面,而极板背风面的低速回流区是主要的收尘区。实验结果表明:空气动力驱进速度与电场风速呈二次曲线分布关系。电场风速小于1.5 m/s时,气流运动强化了空气动力增效幅度;而电场风速大于1.5 m/s后,二次扬尘作用减弱了空气动力增效幅度。横向双极电除尘器除尘效率修正公式表明:在横向双极电除尘器结构参数一定的情况下,除尘效率受静电力和空气动力的共同影响。In order to clarify the aerodynamic enhancement on the bipolar transverse plate electrostatic precipitator(BESP),based on the classical Deutsch formula of electrostatic precipitator(ESP),the aerodynamic influence on the collection efficiency of BESP was analyzed.The numerical simulation results show that the migration velocity of charged particles in the BESP is the sum of the electrostatic migration velocity and the aerodynamic migration velocity.The aerodynamic enhancement amplitude of windward side of the plates is stronger than that of the leeward side.Due to the lower speed in the return flow region,the leeward side of the plates are the main dust deposition areas.The experimental results show that the aerodynamic migration velocity is proportional to the quadratic of the gas velocity.When the wind speed is lower than 1.5 m/s,the aerodynamic migration velocity is strengthened by the gas flow.However,when the wind speed is higher than 1.5 m/s,the aerodynamic migration velocity is reduced by the dust re-entrainment.When the structural parameters are constant,the correction formula of the collection efficiency shows that the collection efficiency of BESP is determined by both electrostatic force and aerodynamic force.

关 键 词：空气动力 驱进速度 横向双极电除尘器 除尘效率 二次扬尘 

分 类 号：X513[环境科学与工程—环境工程]