环流式旋风除尘器内颗粒运动的数值模拟  

Numerical simulation of the particles motion in circumfluent cyclone separator

作　　者：谷新春 王宇光 王伟文[2] 王立新[2] 陈光辉[2] 李建隆[2] 

机构地区：[1]中国化学赛鼎宁波工程有限公司,浙江宁波315040 [2]青岛科技大学化工学院,山东青岛266042

出　　处：《化学工业与工程技术》2013年第6期45-50,共6页Journal of Chemical Industry & Engineering

摘　　要：采用CFD软件Fluent提供的雷诺应力模型(RSM)和随机轨道模型,对环流式旋风除尘器内颗粒运动轨迹进行了数值模拟研究。预测了不同粒径颗粒的运动轨迹和分离效率。结果表明:颗粒在环流式旋风除尘器内的运动路径比常规除尘器长;特殊的流路设计,避免了常规旋风除尘器易产生的上灰环和颗粒短路问题,使除尘效率大幅度提高;除尘器内颗粒运动有较强的随机性,尤其对于小颗粒,受气流湍动影响显著。对不同粒径颗粒分离效率的预测表明:环流式旋风除尘器的分割粒径为1.25μm。The three-dimension flow field and particle tracks in circumfluent cyclone separator are simulated using the Reynolds stress model （RSM） and the couple discrete random walk model for two-phase that Fluent 6. 2 program provided. The motion tracks of particle with difference diameter and separation efficiency are predicted. The results show that the particle motion path is longer in cir- cumfluent cyclone than in conventional cyclones. Special fluid track design eliminates possible source causing local secondary vortex and short cut flow existing in conventional cyclones. Therefore, the collection efficiency of circumfluent cyclone is advanced. Particle motion is random and complex influenced by turbulence, especial for the small particle. The calculated results for the separation effi- ciency of different diameter particle show that the segmentation particle diameter of circumfluent cyclone is 1.25 μm.

关 键 词：旋风除尘器 环流式 颗粒运动 数值模拟 计算流体力学 

分 类 号：TQ051.8[化学工程]