板型对电除尘器内部流场和除尘效率的影响  

Influence of plate shape on flow field and efficiency of electrostatic precipitator

作　　者：王佳豪 黄超[1] 杨振民[1] 耿婉婷 王美艳 WANG Jiahao;HUANG Chao;YANG Zhenmin;GENG Wanting;WANG Meiyan(School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401

出　　处：《能源环境保护》2020年第6期40-46,共7页Energy Environmental Protection

摘　　要：基于COMSOL Multiphysics对电除尘器的二维模型进行了数值模拟,建立了以静电场、湍流场和流体粒子为追踪模块的耦合物理场,在有EHD流的情况下分析了收尘极版形状(P型板、BE型板、CW型板和M型板)、风速、电压、粒径和温度对静电除尘器内静电场、湍流场和除尘效率的影响。结果表明:收尘极板形状对电势分布有影响,BE板电势不均匀程度最高;不同极板的除尘效率与放电极电压和颗粒物粒径正相关,与一次风速和温度负相关;在不同工况下,BE板除尘效率最佳;增强离子风有助于提高除尘效率。Based on COMSOL Multiphysics,a two-dimensional model of electrostatic precipitator is numerically simulated.A coupled physical field was established taking electrostatic field,turbulent flow field and fluid particles as tracking modules.With EHD flow,the influences of collector plate shape(Ptype plate,BE-type plate,CW-type plate and M-type plate),wind speed,voltage,particle size and temperature on electrostatic field,turbulent flow field and dust removal efficiency were analyzed.The results show that the shape of the dust collecting plate affects the electric potential distribution,and electric potential on BE-type plate is the most uneven.The dust removal efficiency of different plates is positively correlated with discharge electrode voltage and particle size,and negatively correlated with primary wind speed and temperature.Under different working conditions,BE-type plate has the highest dust removal efficiency.Enhancing the ion wind is helpful to improve the dust removal efficiency.

关 键 词：数值模拟 电除尘器 EHD流 收尘极板形状 除尘效率 

分 类 号：X701.2[环境科学与工程—环境工程]