螺旋导叶与分离器内壁间隙对分离器内流场及分离性能的影响  

Effect of the Gap between Spiral Guide Vane and Inner Wall on the Separator Internal Flowfield and Performance

作　　者：独岩 孙国刚[1] 祖泽辉 DU Yan;SUN Guo-gang;ZU Ze-hui(College of Mechanical and Storage Engineering,China University of Petroleum(Beijing))

机构地区：[1]中国石油大学(北京)机械与储运工程学院

出　　处：《化工机械》2022年第3期386-393,共8页Chemical Engineering & Machinery

摘　　要：依据现有螺旋导叶和气液分离器结构的设计方法,建立筒径300 mm的轴流式螺旋导叶气液分离器模型,在直流和逆流两种排气方式下,对0、1、2、4、6 mm 5组导叶环隙宽度进行数值模拟,研究导叶环隙宽度对内流场的影响,并通过试验对比分析导叶环隙宽度对分离性能的影响。模拟结果表明:导叶环隙宽度增大,压降和切向速度逐渐降低,环隙流量占比逐渐增大;综合考虑压降和离心分离作用,1~2 mm是较适宜的环隙宽度。试验结果表明:相对于无环隙结构,1~2 mm的环隙宽度不但能减小导叶区域的流通阻力,降低设备压降,减小能耗,还有利于疏通贴壁液膜的下行流动,防止液膜汇聚在导叶尾端形成雾沫夹带,从而提高分离效率。Basing on the existing design method for the spiral guide vane and gas-liquid separator structure,the model of axial flow spiral guide vane gas-liquid separator with a 300 mm-cylinder diameter was designed.Five gap widths(0 mm,1 mm,2 mm,4 mm,6 mm)between the spiral guide vane and the inner wall were numerically simulated under two exhaust modes of direct and counter current,including the study of the size influence of guide vane gap’s width on the flow field,and the comparison and analysis of guide vane gap’s influence on the separation performance through experiments.The simulation results show that,when the width of guide vane gap increases,the pressure drop and tangential velocity decrease gradually and the proportion of guide vane gap flow increases gradually.Considering the effect of pressure drop and centrifugal separation,1-2 mm is the appropriate gap width.The test results show that,compared with the no-gap structure,a 1-2 mm gap can reduce the flow resistance in the guide vane area,decrease the pressure drop and the energy consumption;and it can facilitate the downward flow of the attached liquid film,prevent the liquid film from gathering at the end of the guide vane to form the entrainment,as well as improve the separation efficiency.

关 键 词：气液分离器 导叶环隙 内流场 分离性能 数值模拟 试验研究 

分 类 号：TQ051.8[化学工程]