锥盘底和平底搅拌槽固液混合特性的CFD研究  

CFD Research for Solid-Liquid Mixing Characteristics in Cone-Bottom and Flat-Bottom Stirred Tanks

作　　者：贾慧灵[1,2] 赵静[1] 李梅[2,3] 任保根 JIA Hui-ling1,2, ZHAO Jing1,LI Mei2,3, REN Bao-gen1(1.School of Mechanical Engineering, Inner Mongolia University of Sciences and Technology, Inner Mongolia Baotou 014010, China;2.College of Materials Science and Engineering, Beijing University of Chemical Engineering, Beijing 100029,China; 3.School of Material and Metallurgy, Inner Mongolia University of Sciences and Technology, Inner Mongolia Baotou 014010, Chin)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010 [2]北京化工大学材料科学与工程学院,北京100029 [3]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《机械设计与制造》2018年第8期84-87,共4页Machinery Design & Manufacture

基　　金：内蒙古自治区高等学校科学技术研究项目(NJZY14169);教育部创新团队项目(2011CB612203)

摘　　要：利用CFD软件分别对固液混合的锥盘底搅拌槽和平底搅拌槽内的固相浓度场进行数值模拟,研究了搅拌槽底部形状对固液混合时间、搅拌功率、湍动能和固相速度的影响。研究表明:平底搅拌槽中的循环流不能到达槽底中央和槽底与槽壁的交接处,在这两个部位易产生固体颗粒的沉积,锥盘底搅拌槽的固液相混合时间比平底搅拌槽的省时22%,平底搅拌槽和锥盘底搅拌槽的功率消耗几乎相同,锥盘底搅拌槽3个监测点的湍动能都大于相应的平底搅拌槽的,锥盘底搅拌槽的监测点固相速度也比相应的平底搅拌槽的大。综合考虑锥盘底搅拌槽的各个固液混合参量都优于相应的平底搅拌槽。The solid-phaseconcentration fields of cone-bottom stirred tank and flat-bottom stirred tank were simulated by using CFD. It mainly investigated the effects of the shape of stirred tank on mixed time,stirring power,turbulent kinetic energy,and solid-phase velocity. Studies have shown that the circulation flow offlat bottom stirred tank does not reach the central bottom and the junction of bottom and walls,which will result in the deposition of solid particles. The cone-bottom stirred tank saves mixing time by 22% than the flat-bottomed stirred tank. The power consumption of them are almost the same. The turbulent kinetic energy of cone-bottom stirred tank at three monitoring points is greater than that of the flat-bottomed stirred tank. The solid-phase velocity of cone-bottom stirred tank is larger than that of the flat-bottomed stirred tank.Through the comprehensive analysis,the mixing parameters of cone-bottom stirred tank are all better than those of flat-bottom stirred tank.

关 键 词：锥盘底搅拌槽 平底搅拌槽 固相浓度场 计算流体力学 

分 类 号：TH16[机械工程—机械制造及自动化] TQ027[化学工程]