水力旋流器内固相颗粒运动行为分析  

Analysis of solid particle′s migration in hydrocyclone

作　　者：李枫[1,2] 赵嵘广 邢雷 刘彩玉[1,2] 伍小金 LI Feng;ZHAO Rongguang;XING Lei;LIU Caiyu;WU Xiaojin(College of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163000,Heilongjiang Province,China;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention,Daqing 163000,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163000 [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163000

出　　处：《化学工程》2023年第7期55-60,共6页Chemical Engineering(China)

摘　　要：为探究固相颗粒在水力旋流器中的运动行为,使用CFD-DEM(流体动力学耦合离散元素)计算方法,针对不同进液量及粒径对颗粒运动轨迹的影响规律进行系统分析。结果表明:颗粒在旋流器中的运动可以根据颗粒运动轨迹特征分为抛物线运动、加速运动以及循环运动3个阶段,颗粒不同运动阶段的起始位置以及颗粒在旋流器中的碰撞次数主要由进液量决定,当入口流速由0.626 m/s增加到1.879 m/s时,循环运动阶段起始位置由轴向坐标位置Z=-54.11 mm处上移到Z=6.67 mm处,碰撞次数由4次增加至83次,这使得颗粒在旋流器中停留时间更长分离难度增大;当颗粒发生碰撞时,颗粒接触反力与颗粒粒径相关,且随着颗粒粒径的增大,接触反力逐渐升高。颗粒粒径由1 mm增加到3 mm,接触反力均值由4.5×10^(-4) N增加到0.025 N。In order to analysis the migration of solid particles in hydrocyclone,the influence of different liquid intake on particle trajectory is analyzed systematically by using the CFD-DEM coupling calculation method.The results show that according to the characteristics of particle trajectory,the motion of particles in hydrocyclone can be divided into three stages:parabolic motion,accelerated motion and cyclic motion.The initial position of different stages of particle motion and the number of collisions of particles in the hydrocyclone are mainly determined by the liquid intake.When the inlet flow velocity increases from 0.626 m/s to 1.879 m/s,the starting position of the cyclic motion phase moves up from the axial coordinate position Z=-54.11 mm to Z=6.67 mm,and the number of collisions increases from 4 to 83,which makes the particles stay in the hydrocyclone for so long that it is more difficult to separate.When the particles collide,the contact reaction force is related to the particle size,and the contact reaction force increases with the increase of the particle size.The average contact reaction force increases from 4.5×10^(-4) N to 0.025 N when the particle size increases from 1 mm to 3 mm.

关 键 词：固相颗粒 两相流 运动行为 数值模拟 水力旋流器 

分 类 号：TQ051.8[化学工程]