含聚合物工况下旋流器分离特性的CFD-PBM数值模拟  

CFD-PBM Numerical Simulation of Cyclone Performance Characteristics with Polymers

作　　者：夏宏泽 赵立新[1,2] 郑国兴 蒋明虎 XIA Hong-ze;ZHAO Li-xin;ZHENG Guo-xing;JIANG Ming-hu(School of Mechanical Science and Engineering,Northeast Petroleum University;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention;Daqing Oilfield Production Engineering Technology Institute)

机构地区：[1]东北石油大学机械科学与工程学院 [2]黑龙江省石油石化多相介质处理及污染防治重点实验室 [3]大庆油田有限责任公司采油工程研究院

出　　处：《化工机械》2020年第6期765-772,共8页Chemical Engineering & Machinery

基　　金：国家“863”计划课题(2012AA061303);东北石油大学“龙江学者”配套科研经费资助项目(LJ201803)。

摘　　要：以螺旋导流内锥式旋流器为研究对象,基于幂律流体模型对含聚合物工况下旋流器内油滴的聚结现象及其对分离性能的影响进行了CFD-PBM数值模拟。结果表明:增加聚合物的浓度,使油滴在锥段内的轴向运动距离延长,边壁附近油滴粒径逐渐增大,增加了油滴从溢流口流出的难度,使分离效率大幅降低;在含聚合物的工况下,增大入口流量使油滴在旋流器轴心区域聚结现象非常明显,分离效率从37.63%提高至80.86%;增加入口含油浓度可以大幅提高旋流器内油滴碰撞聚结的几率,油滴粒径大幅增大,但分离效率会先增后降,入口含油浓度4%时分离效率最高(73.53%)。Through taking spiral-conducting inner cone hydrocyclone as the research object and based on the power-law fluid model,CFD-PBM numerical simulation of the coalescence of oil droplets and its effect on separation performance in the cyclone under polymer-containing conditions was performed.The results showed that,as the polymer concentration increases,the axial movement distance of the oil droplet in the cyclone is extended,and the particle size of the oil droplet near the side wall gradually increases,which makes it more difficult to flow out of the overflow port,and greatly reduces the separation efficiency;under polymer-containing conditions,increasing the inlet flow rate makes the oil droplets coalesce in the axial of the cyclone very obvious,and the separation efficiency is increased from 37.63%to 80.86%;increasing the oil concentration in the inlet can greatly increase the chance of oil droplets colliding and coalescing in the cyclone,and the particle size of the oil droplets is greatly increased,but the separation efficiency will first increase and then decrease.The cyclone has a maximum separation efficiency of 73.53%when the oil concentration is 4%.

关 键 词：旋流器 聚合物 分离特性 聚结 数值模拟 

分 类 号：TQ051.84[化学工程]