除雾器钩板与壁面夹角对除雾效率的影响  

Influence of the Angle Between Hook Plate and Wall Surface on the Removal Efficiency of a Mist Eliminator

作　　者：陈鸿伟[1] 徐继法 刘拓 张巍 贾建东 CHEN Hongwei;XU Jifa;LIU Tuo;ZHANG Wei;JIA Jiandong(School of Energy and Power Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China)

机构地区：[1]华北电力大学能源与动力工程学院

出　　处：《动力工程学报》2019年第12期999-1004,共6页Journal of Chinese Society of Power Engineering

摘　　要：采用数值模拟方法对除雾器钩板与壁面夹角进行了研究,并通过引入K_pP_iRe^2在除雾效率与引风机功耗之间找到平衡点。结果表明:安装钩板可明显提高除雾器的除雾效率,但对直径在10μm以下液滴的除雾效率仍较低;随钩板与壁面夹角的增大,除雾效率和进出口压降明显提高;由于入口流速在2 m/s时对应的进出口压降较小,对引风机功耗影响较低,因此选择钩板与壁面的夹角为50°,此时除雾器能够在保证除雾效率的基础上使引风机功耗较低。Numerical simulations were conducted on the angle between hook plate and wall surface of a mist eliminator to find a balance point between its removal efficiency and the power consumption of related induced draft(ID)fan by introducing the index K_pP_iRe^2.Results show that the removal efficiency of a mist eliminator could be significantly improved by adding a hook plate,but its collection efficiency is still low for the droplets with diameter less than 10μm.With the rise of the angle mentioned above,both the demisting efficiency and the pressure drop increase remarkably.Based on comprehensive analysis,the angle between the hook plate and wall surface is chosen to be 50°,when the demisting efficiency is relatively high and the power consumption of related ID fan is relatively low.

关 键 词：除雾器 除雾效率 钩片角度 数值模拟 

分 类 号：X701[环境科学与工程—环境工程]