径向直叶片湿式旋流除尘器气固两相分离特性的数值分析  

Numerical Analysis of Separation Features for Gas-solid Two-phase in Radial-straight-blade Wet Cyclone Scrubber

作　　者：唐蒲华[1,2] 卜英勇[2] 夏毅敏[2] 向阳辉[1] 史春雪[1] 陈闹[1] 

机构地区：[1]长沙大学,长沙410003 [2]中南大学机电工程学院,长沙410083

出　　处：《煤矿机械》2015年第12期134-137,共4页Coal Mine Machinery

基　　金：国家高技术研究发展计划(863计划;2012AA041801);湖南省战略新兴产业重大科技攻关项目(2012GK4068);湖南省教育厅科研资助项目(11C0117;15C0123)

摘　　要：采用标准k-ε湍流模型,利用CFD软件对径向直叶片湿式旋流除尘器进行了三维流场的模拟,利用实验验证了模型的正确性。采用了离散相模型(DPM)模拟固相流场颗粒轨迹,得出了不同粒径颗粒与不同入口风速下的分离效率之间的关系。结果表明:当气体速度一定时,粒径颗粒越大,则分离效率越高。气体速度增加,5μm和15μm的颗粒的分离效率的变化不大,10μm粒径颗粒的分离效率会增加。Standard k-ε turbulent model was applied. The three-dimensional internal flow field of radial-straight-blade wet cyclone scrubber was simulated based on fluent software. The results showed that the gas numerical simulation results agreed well with the experimental. Discrete phase model（DPM） were used to simulate the turbulent flow of gas phase and particle trajectory of solid phase respectively in separator. The relationship of separation efficiency was discussed between the different inlet velocity and under different particle size. The results show that the inlet velocity of gas is constant,the larger the particle size, the higher the separation efficiency. When gas velocity increase, the separation efficiency of 5 μm and 15 μm particles remained constant, the separation efficiency of 10 um particle size increased.

关 键 词：直叶片湿式旋流除尘器 数值模拟 分离 轨迹 

分 类 号：TH97[机械工程]