改进折点的双涡旋极板电除尘器数值模拟  

Numerical Simulation of the ESP with the New Better Fold of Double Vortexes Plates

作　　者：依成武[1] 顾亚川 依蓉婕 王慧娟[1] 刘诗雯[1] 王晶[1] 

机构地区：[1]江苏大学环境与安全工程学院,镇江212013

出　　处：《高电压技术》2017年第8期2638-2644,共7页High Voltage Engineering

基　　金：国家自然科学基金(51278229);江苏省六大人才峰会基金项目(JNHB-018)~~

摘　　要：为了解决电除尘器(ESP)超微细粉尘除尘效率低、设计参数不足等问题,设计了1种改良型的双涡旋极板电除尘器,收尘极板为改进折点弧度的双涡旋形式并垂直于气流方向放置,每排极板前面加了1排电极,并采用ANSYS14.0中的FLUENT流体仿真软件对电除尘器除尘区域内的流场进行了数值模拟;设置了极板高度H、极板排间距d、粒径dp等影响参数。模拟结果表明:这种改良型极板的电除尘器弥补了以往设计中由于电极和极板间的距离过大而造成的部分区域电场强度较弱的漏洞;H约为14 mm、d约为110 mm时,收尘区域能形成较为良好的涡旋气流;入口平均气流速度v为3 m/s时,极板缝隙最高气流速度可达8.8 m/s,极板附近气流速度可低至0.5 m/s,压力损失约为260 Pa;颗粒停留时间能增加约3倍。该研究考虑了电场、流场等各方面的因素,使研究科学、准确;这种新电除尘器性能优势十分明显,为设计研究和工业应用提供了相应的参数和依据。Electrostatic precipitators （ESP） with the improved new tape of double vortexes plates were designed to solve the problems of low removal efficiency of super-fine dust of ESP and lack of design parameters. A row of electrode was added in front of each row of the plates and plates were optimized. The flow field of ESP was simulated by FLUENT of ANSYS 14.0, and three kinds of factors of high of plates（H）, distance of each row of plates （d）, and particle size（dp） were set. Simulation results show that this new ESP can compensate the shortages in the past that the electric field strength is weak in the parks of region for the distance between the electrodes and plates is too large; a double vortex flow can be formed in the region of plates when H is 14 mm and d is 110 mm. The highest wind speed can reach 8.8 m/s in the plate slit, the wind speed can reach 0.5 m/s near the plate and the pressure loss is about 260 Pa when speed is 3 m/s; Particle residence time can increase by about three times. Integrity and scientific are remarkably improved by the effect of electric field. It is showed that the performance advantages of new ESP, are obvious, and this new ESP provides the corresponding parameters and basis for the design of research and industrial application.

关 键 词：双涡旋极板 电除尘器 ESP 数值模拟 UDF 电场 

分 类 号：X701.2[环境科学与工程—环境工程]