基于CFD-DEM的高聚物颗粒流化干燥特性研究  

Research on Fluidized Drying Characteristics of Polymer Particles Based on CFD-DEM

作　　者：王晓静[1] 于雪 WANG Xiao-jing;YU Xue(School of Chemical Engineering and Technology,Tianjin University)

机构地区：[1]天津大学化工学院

出　　处：《化工机械》2022年第1期84-89,共6页Chemical Engineering & Machinery

摘　　要：基于CFD-DEM(计算流体力学-离散单元法),结合传热和传质模型,探究了气体速度、气体温度和粒径大小对高聚物颗粒干燥特性的影响规律。结果表明:颗粒干燥过程主要发生在恒速干燥阶段,随着气体速度和气体温度的增大或颗粒粒径的减小,颗粒干燥速率逐渐增大,干燥时间逐渐减少;拟合模拟数据得到MR=aexp(-kt^(n))模型能够很好地描述颗粒的失水规律。Based on CFD-DEM(computational fluid dynamics-discrete element method)method and combined with heat transfer and mass transfer models,the influence of gas’velocity and temperature and particle size on the drying characteristics of particles was explored.The results show that,the particle drying process mainly occurs in constant-speed drying stage.As the gas velocity and gas temperature increase or the particle size decreases,the particle drying rate gradually increases and the drying time decreases.Fitting the simulation data finds that,MR=aexp(-kt^(n))model can describe the water loss law of particles.

关 键 词：颗粒干燥 高聚物 流化干燥 振动流化床 CFD-DEM 干燥特性 干燥动力学模型 

分 类 号：TQ028.67[化学工程]