化学工程2012，Vol.40Issue(1)：64-67,72,5.
双循环旋风分离器除尘机理的数值模拟
Numerical simulation of dust separation mechanism of double circulation cyclone separator
王立新 1吴冉1
作者信息
- 1. 青岛科技大学化工学院,山东青岛266042
- 折叠
摘要
Abstract
By setting the main gas inlet on the middle part of the cylinder wall of double circulation cyclone separator, and the top inlet as a reflux inlet, the secondary flow at the first swirl of main inlet gas flow can be eliminated by the double circulation cyclone separator, thus improving the collection efficiency of particles larger than 3 μm to nearly 100% , and avoiding the shortcut of a few particles of 11-15 μm. For the purpose of researching the dust separation mechanism, based on CFD software and numerical simulation, the effect of two kinds of inlets on the performance of cyclone separator and the mechanism that conventional cyclone separators can not completely collect particles of 3-8 μm and particles between 11-15 μm were studied. The results show that when the gas velocity of reflux inlet is less than that of main inlet, the secondary flow occurs at the top of swirling field of main inlet gas flow, resulting in the decrease of collection efficiency of particles less than 6 μm; when the gas velocity of reflux inlet is slightly larger than that of main inlet, the secondary flow can be eliminated completely, and the collection efficiency of all particles are higher. From the qualitative viewpoint, the simulative results are in good agreement with the experimental results.关键词
旋风分离器/二次流/数值模拟/颗粒轨迹Key words
cyclone separator/ secondary flow/ numerical simulation/ particle trajectory分类
化学化工引用本文复制引用
王立新,吴冉..双循环旋风分离器除尘机理的数值模拟[J].化学工程,2012,40(1):64-67,72,5.
