旋流场内固相颗粒停留时间与运动特性研究  

The Study of Motion Characteristics and Residence Time of Solid Particles in Hydrocyclone

作　　者：张艳[1] 蒋明虎[1] 张勇[1,2] 陈有斌 邢雷 ZHANG Yan;JIANG Ming-hu;ZHANG Yong;CHEN You-bin;XING Lei(School of Mechanical Science and Engineering,Northeast Petroleum University;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention)

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

出　　处：《化工机械》2018年第4期515-520,共6页Chemical Engineering & Machinery

基　　金：国家高科技研究和发展计划"863"项目(2012AA061303);国家教育部高等学校博士学科点专项科研基金资助课题(20132322110002)

摘　　要：以单入口固-液分离水力旋流器为研究对象,采用计算流体动力学(CFD)与离散元(DEM)耦合的方法,对固-液两相分离过程进行数值模拟分析,得出了固相颗粒在内旋流、外旋流作用下呈现出的不同运动特性。结果表明:在零轴向速度包络面的影响下,圆柱段与圆锥段过渡处的轴心附近存在颗粒高浓度分布区域;在旋流分离过程中由溢流口逃逸用时约为2s的颗粒浓度分布最高,被底流口捕获用时约为4s左右的颗粒浓度分布最高。Through taking a single-entry solid-liquid separation hydrocyclone as the object of study,having CFD coupled with DEM（ discrete element method） to simulate and analyze solid-liquid separation process was implemented so as to get motion characteristics of solid particles under the action of inner circulating flow and outer circulating flow respectively. The results show that,under the effect of zero axial velocity envelope,the high particle concentration distribution can be seen near the axes of transition between cylindrical section and cone segment; in the process of swirling separation,the particles＇ concentration distribution becomes highest when the time of escaping from the overflow port stays at about 2 s,so does the particle concentration distribution when the time to be captured by bottom flow port is about 4 s.

关 键 词：水力旋流器 固相颗粒 运动特性 停留时间 溢流口 底流口 

分 类 号：TQ051.8[化学工程]