新型复合式除雾器分离性能的分析  

Separation Performance Analysis of a Novel Compound Demister

作　　者：陈鸿伟[1] 冯旭鹏 徐继法 艾天超 CHEN Hongwei;FENG Xupeng;XU Jifa;AI Tianchao(School of Energy and Power Engineering,North China Electric Power University,Baoding 071000,Hebei Province,China)

机构地区：[1]华北电力大学能源与动力工程学院,河北保定071000

出　　处：《动力工程学报》2020年第8期654-659,共6页Journal of Chinese Society of Power Engineering

摘　　要：以折流板除雾器为基本结构,在折流板除雾器弯折管道处增加1排圆管,构成新型复合式除雾器。采用计算流体力学方法对折流板除雾器、带勾板折流板除雾器及新型复合式除雾器进行数值模拟和分析。结果表明:液滴粒径小于20μm时,新型复合式除雾器的除雾效率明显高于折流板除雾器和带勾板折流板除雾器;当入口流速为4 m/s、液滴粒径为10μm时,新型复合式除雾器比折流板除雾器的除雾效率提高了9.33%,比带勾板折流板除雾器的除雾效率提高了5.33%;新型复合式除雾器的管排对来流的节流作用和气流的湍动作用可提高除雾器的除雾效果;在管排处新型复合式除雾器对液滴的捕集数量最大,管排在新型复合式除雾器中起重要作用。Based on the basic structure of a baffle demister,a new composite demister was manufactured by adding a row of round tubes in the bend pipe area.The method of computational fluid dynamics was used to numerically simulate and analyze the original baffle demister,the baffle demister with hook plate and the new composite demister.Results show that when the droplet size is less than 20μm,the defogging efficiency of the new composite demister is significantly higher than that of the original baffle demister and the baffle demister with hook plate;when the inlet flow rate is 4 m/s,and the droplet size is 10μm,the new compound demister would have a defogging efficiency 9.33%higher than the original baffle demister,and 5.33%higher than the baffle demister with hook plate;the restriction of tube bank against incoming flow and the turbulence of the airflow can improve the defogging effectiveness of the new composite demister;the new composite demister captures the maximum number of droplets in tube bank area,indicating that the tube bank plays an important role in the new composite demister.

关 键 词：除雾效率 复合式除雾器 液滴粒径 捕集位置 管排 数值模拟 

分 类 号：X513[环境科学与工程—环境工程]