排气口与排尘口直径对旋风分离器性能影响的对比分析  

Comparative Analysis on Influence of Gas Outlet and Dust Outlet Diameter on Performance of Cyclone Separator

作　　者：叶宗权 龚德鸿[1] 林志恒 蒲倩 YE Zong-quan;GONG De-hong;LIN Zhi-heng(Electrical Engineering College,Guizhou University)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025

出　　处：《电站系统工程》2023年第1期7-11,共5页Power System Engineering

基　　金：贵州省自然科学基金项目(黔科合基础[2019]1059)资助。

摘　　要：针对排气口与排尘口直径对旋风分离器流场及分离性能的影响,通过数值模拟,分析缩小排气口与增大排尘口直径下不同旋风分离器的切向速度、轴向速度、压降、分离效率的变化情况。研究结果表明:缩小排气口直径,旋风分离器内部切向速度和轴向速度整体增大,内部涡流直径缩减,显著提升旋风分离器的分离能力,且对于颗粒粒径越小的颗粒分离效率提升越显著,但旋风分离器内部压降损失也会随着排气口直径的缩小而急剧增加。增大排尘口直径,当出口直径增大为0.5D时,整体切向速度会略微减小,外旋流部分轴向速度增大,旋风分离器的总分离效率会得到提升,内部压降损失会降低。继续增大排尘口直径到0.625D,对旋风分离器内部流场及分离性能影响不大。In view of the influence of diameter of gas outlet and dust outlet on the flow field and separation performance of cyclone separator, through numerical simulation, the changes of tangential velocity, axial velocity, pressure drop and separation efficiency of different cyclones under reducing the diameter of gas outlet and increasing the diameter of dust outlet are analyzed. The results show that when the gas outlet diameter is reduced, the internal tangential velocity and axial velocity of the cyclone separator increase as a whole, and the internal vortex diameter is reduced, which significantly improves the separation capacity of the cyclone separator. For particles with smaller particle size, the separation efficiency is improved more significantly, but the internal pressure drop loss of the cyclone separator will also increase sharply. Increasing the diameter of the dust outlet, when the outlet diameter increases to 0.5D, the overall tangential velocity will decrease slightly, the axial velocity of the outer cyclone will increase, the total separation efficiency of the cyclone will be improved, and the internal pressure drop loss will be reduced. Increasing the diameter of the dust outlet to 0.625D has little effect on the internal flow field and separation performance of the cyclone separator.

关 键 词：排气口 排尘口 旋风分离器 流场 压降 分离效率 

分 类 号：TH138.8[机械工程—机械制造及自动化]