含聚质量浓度对油水旋流分离器性能的影响分析  

Analysis of polymer mass concentration on performance of oil-water hydrocyclone separator

作　　者：李枫[1,2] 王志杰 赵立新 LI Feng;WANG Zhi-jie;ZHAO Li-xin(School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang Province,China;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention,Daqing 163318,Heilongjiang Province,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [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,黑龙江大庆163318

出　　处：《化学工程》2019年第12期62-67,共6页Chemical Engineering(China)

基　　金：国家863计划课题资助项目(2012AA061303);东北石油大学“龙江学者”配套资助项目(lj201803)

摘　　要：实验测试了4种不同含聚质量浓度水溶液的流变特性,基于幂律流体的流变模式进行回归分析,得到了不同质量浓度下聚合物水溶液的黏度模型,采用该黏度模型对螺旋导流式旋流器内连续相流场的计算进行了修正,并选用离散相模型(DPM)对油滴运移轨迹进行求解。含聚质量浓度在0—1600 mg/L范围内,对比旋流器黏度场、速度场(切向速度、轴向速度、径向速度)、压力损失和油滴运移轨迹发现:受剪切影响旋流器内连续相黏度变化较大,径向分布呈“M”形,入口处黏度最高;分离效率从93.9%下降到73.2%,切向速度均值降低,而轴向速度和径向速度均值呈现出上升趋势;随含聚质量浓度上升,在旋流腔及锥段处油滴的轴向运移多次表现出“循环流”特征,并且在通过螺旋流道出口后其合速度骤然衰减,速度大小在较低范围内高幅度波动,最终未能及时进入内旋流造成分离效率下降。The rheological properties of four mass concentrations of polymer aqueous solution were tested experimentally.Regression analysis was carried out based on the rheological model of power law fluid,and the viscosity model of different mass concentrations of polymer aqueous solution was obtained.The viscosity model was used to correct the calculation of the continuous phase flow field in the spiral diversion hydrocyclone,and the Discrete Phase Model(DPM)was used to solve the oil droplet migration trajectory.In the range of polymer mass concentration from 0 to 1600 mg/L,the viscosity field and velocity field(tangential velocity,axial velocity,radial velocity),pressure loss and oil droplet migration trajectory of the hydrocyclone were compared.It is found that the continuous phase viscosity in the hydrocyclone changes greatly due to shearing,the radial distribution is“M”shape,and the viscosity at the inlet is the highest.The separation efficiency decreases from 93.9%to 73.2%,the average tangential velocity decreases,and the average axial velocity and radial velocity show an upward trend.As the polymer mass concentration increases,the axial migration of oil droplets at the swirl chamber and the cone segment exhibits a"circulating flow"characteristic many times.And after passing through the spiral runner exit,the velocity magnitude suddenly attenuates,and the velocity fluctuates at a high amplitude in a lower range.Finally,the oil droplet fails to enter the internal swirling flow in time,resulting in a decrease in separation efficiency.

关 键 词：旋流器 含聚质量浓度 表观黏度 数值模拟 粒子轨迹 

分 类 号：TQ021.1[化学工程]