十字形挡板造粒室内干法制粉混料过程数值模拟  

Numerical Simulation of Mixing Process of Dry Granulation in Cruciform Baffle Granulation Chamber

作　　者：吴南星 邓立钧 朱祚祥 余冬玲 陈涛 廖达海 WU Nan-xing;DENG Li-jun;ZHU Zuo-xiang;YU Dong-ling;CHEN Tao;LIAO Da-hai(School of Mechanical and Electronic Engineering,Jingdezhen Ceramic Institute,Jingdezhen 333403,China)

机构地区：[1]景德镇陶瓷大学机械电子工程学院,景德镇333403

出　　处：《硅酸盐通报》2018年第11期3545-3550,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51365018);江西省高等学校科技落地计划(KJLD14074);江西省科技支撑计划(20151BBE50041)

摘　　要：为改善干法制粉造粒室内颗粒混合特性,使其具有良好的造粒效果。采用计算流体力学方法,构建欧拉-欧拉双流体模型,对气固两相流场进行数值模拟,分析了十字形挡板造粒室内的压力场、速度场及颗粒体积分数,并结合实验与数值结果进行对比。结果表明:底部加装十字形挡板后,造粒室底部的压力分布状况更为均匀,提高了造粒室内颗粒整体速度;十字形挡板造粒室内颗粒体积分布达到71%,颗粒能够充满造粒室大部分区域,改善了底部颗粒堆积现象;颗粒合格率提高了6. 9%,流动性指数提高了6;实验结果验证了数值模拟的正确性,十字形挡板造粒室有利于促进颗粒混合,提高了颗粒的合格率及流动性,造粒效果更优。In order to improve the particle mixing characteristics of dry milling granulation chamber,it had a good granulation effect.The Euler Euler two fluid model was built by computational fluid dynamics(CFD)method,and the numerical simulation of gas-solid two-phase flow field was carried out.The pressure field,velocity field and particle volume fraction in the cross shaped baffle pelletizing chamber were analyzed,and the results were compared with experimental and numerical results.The results show that the pressure distribution at the bottom of the granulation room is more uniform after adding a cruciform baffle at the bottom,which improves the overall velocity of granulation in the granulation room.The particle volume distribution inside the cruciform baffle granulation chamber reaches 71%,and the particles can fill most areas of the granulation chamber,which improves the accumulation of particles at the bottom of the granulation chamber.The qualified rate of particles increase by 6.9%,and the liquidity index increase by 6.The experimental results verify the correctness of the numerical simulation.The cross shaped baffle granulation chamber is conducive to promoting particle mixing,improving the qualified rate and mobility of particles,and granulation effect is better.

关 键 词：干法制粉 十字形挡板 混料过程 数值分析 造粒室 

分 类 号：TQ174.5[化学工程—陶瓷工业]