摘要
基于计算流体动力学的离散相模型和RNG k-ε湍流模型,将流场与电场耦合,对超细粉体静电场湿法分级过程进行数值模拟.结果表明:分级区内流体的竖直方向分速度为零,流体仅做水平流动,该区域电场强度分布较为均匀,可视为匀强电场区域;进料速比和进料流速都是通过影响水平流速间接影响分级效果,水平流速越小,颗粒部分分级效率越大,分级粒径越小;增加电极电压,可提高部分分级效率,减小分级粒径.
By coupling the flow field with the electrostatic field,the wet classification process of ultrafine powder in electrostatic field was simulated numerically with computational fluid dynamics,in which the discrete phase fluid model and RNG k-εturbulence model were applied.The results showed that the vertical velocity of the fluid in the classification zone was zero,the fluid only flowed horizontally,and the electric field intensity distribution in this region was relatively uniform,so it was regarded as a uniform electric field.Both the feed rate ratio and the feed flow rate indirectly affected the classification effect by affecting the horizontal flow rate.The smaller the horizontal flow rate,the higher the partial classification efficiency,and the smaller the classification particle size.Increasing the electrode voltage can improve the partial classification efficiency and reduce the classification particle size.
作者
郑向阳
俞建峰
刘志强
俞俊楠
李志华
黄然
金楠
宋明淦
ZHENG Xiang-yang;YU Jian-feng;LIU Zhi-qiang;YU Jun-nan;LI Zhi-hua;HUANG Ran;JIN Nan;SONG Ming-gan(School of Mechanical Engineering,Jiangnan University,Jiangsu Wuxi214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment&Technology,Jiangsu Wuxi214122,China;Wuxi Hope Light Industry Equipment Technology Co.,Ltd.,Jiangsu Wuxi214122,China)
出处
《当代化工》
CAS
2019年第10期2428-2431,2435,共5页
Contemporary Chemical Industry
基金
2017年江苏省研究生实践创新计划项目,项目号:SJCX17-0484
2018年江苏省大学生创新训练计划项目,项目号:2018016Z
2018年江南大学国家级大学生创新创业训练计划项目,项目号:201810295016
关键词
静电场
湿法分级
数值模拟
部分分级效率
Electrostatic field
Wet classification
Numerical simulation
Partial classification efficiency
