收尘区脉冲供电对电除尘器收集性能的影响  

Influence of pulse supply in collecting area on collection performance of electrostatic precipitator

作　　者：李济吾[1] 李世远[1] 

机构地区：[1]浙江工商大学环境科学与工程学院,杭州310035

出　　处：《环境工程学报》2011年第2期399-403,共5页Chinese Journal of Environmental Engineering

基　　金：浙江省科技计划项目(2009C33062)

摘　　要：建立了双区电除尘器实验模型,研究了预荷电压、不同供电方式下极板间距、电极型式对双区电除尘器收尘效果的影响。结果表明:随着预荷电压逐渐升高,除尘效率也随之增加,双区除尘效果明显优于单区的除尘效果。脉冲供电对电除尘器的除尘性能影响明显,与直流供电相比,脉冲供电对PM2.5的分级效率可提高16.9%;在较高的电压时,极板间距为400 mm的除尘效率明显高于间距为300 mm的除尘效率,同时其驱进速度也有很大的提高;芒刺电极收尘效果显著优于光滑电极;对小于20μm的颗粒,脉冲放电提高其驱进速度平均为54.22%。The two-stages electrostatic precipitator（ESP） model was set up.The dust collection efficiency of two-stages electrostatic precipitator（ESP） was investigated under different parameters,including pre-charge voltage,power supply mode,electrode-plate space distance,and electrode type.The result showed that the dust collection efficiency of two-stages ESP increased with increasing of pre-charge voltage,and was better than that of single-stage ESP.The dust collection efficiency under pulse power was better than that under DC supply power;as to PM2.5,which grade efficiency is over 16.9% highter than that of in DC supply power.The dust collection efficiency at electrode-plate space distance 400 mm was higher than that of at 300 mm,and the migration was depply enhanced.Nail electrode had a more contribution than smooth electrode under same base supply voltage.The migration velocity of PM20 under pulse power was over 54.22% highter than that under DC supply power.

关 键 词：双区电除尘器 粉尘 脉冲供电 直流供电 除尘效率 

分 类 号：X511[环境科学与工程—环境工程]