反浮选-冷结晶氯化钾生产过程中硫酸钙旋流分离数值模拟  

Numerical simulation of cyclone separation of calcium sulfate in production of potassium chloride

作　　者：刘够生[1] 宋积品 汪瑾[1] 宋兴福[1] 于建国[1] 

机构地区：[1]华东理工大学,国家盐湖资源综合利用工程技术研究中心,上海200237 [2]青海盐湖钾肥股份有限公司,青海格尔木816000

出　　处：《计算机与应用化学》2010年第3期283-288,共6页Computers and Applied Chemistry

基　　金：青海省2004年度重大科技攻关项目(2004-G-105);上海市重点学科建设项目B506

摘　　要：为了研究用于氯化钾旋流分离的旋流芯管内部的流场,模拟粗光卤石矿中小颗粒硫酸钙的分离性能,采用Fluent软件,K-ε模型及雷诺应力模型(RSM),数值模拟旋流芯管内颗粒的流动,得其内部流场的轴向速度、切向速度、径向速度和压力分布规律,分析压力场和速度场的分离特征。通过与实验结果的比较,结果表明,上下出口物料中固体颗粒的粒度分布及物料流量与实验结果非常接近,且当进口物料浓度较高时,上出口物料对大颗粒的夹带明显,降低了分离效率。因此,设备放大时溢流口与底流口的直径设计对分离性能影响较大。In order to investigate the turbulent flow field in hydrocyclone for separation of CaSO4 particles in KC1 production, the CaS04 particles in the hydrocyclone was simulated by means of K-ε and RSM models by Fluent software. Through simulation, the distribution rules of the pressure, the axial velocity, the tangential velocity and the radial velocity were obtained. The separation properties were analyzed by pressure field and velocity field. Comparison between numerical simulation and experiments showed that the distribu- tions of particle size and their flow in overflow and underflow were similar, when the feed concentration was high, the large size of particles carried away in overflow was obvious, indicating the separating efficient was low. Therefore, the diameter for overflow and underflow is significant for the separating efficient in scale up design.

关 键 词：数值模拟 氯化钾 硫酸钙 旋流分离 

分 类 号：TQ015.9[化学工程]