基于流场控制的导向叶片式旋风管开缝面积比的优化设计  

The Optimization of Slotted Vortex Finder in PSC Cyclone Tube Based on Flow Field Control

作　　者：许伟伟[1] 马艳杰[1] 王建军[1] 金有海[1] 

机构地区：[1]中国石油大学(华东)机电工程学院,山东东营257061

出　　处：《高校化学工程学报》2010年第3期523-527,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：863基金项目(2006AA06Z224);教育部重点项目(109159);中国石油大学研究生创新基金;中央高校基本科研业务费专项资金(09CX04027A)

摘　　要：通过试验与数值模拟相结合的方法,研究了分流型芯管开缝面积比对导向叶片式旋风管内流场及性能的影响关系。研究发现,随着开缝面积比的增加,经芯管侧缝流走的气量Q1逐渐增加,但当开缝面积比大于2.9时,Q1呈现饱和状态;开缝面积比大于1.94时,短路流量保持在总进口流量的5%以下;分离空间内切向速度、轴向速度及向心径向速度随开缝面积比的增加而减小;旋风管内能耗随着开缝面积比的增加而减小。另外,内旋流区及排气管内的能耗受芯管开缝面积比的影响较大;芯管开缝面积比的最优范围为1.94-2.9。实验结果表明：入口流量为2380m3·s^-1,入口颗粒浓度为1g·m^-1的滑石粉,开缝面积比为2.42时,分流型芯管提高分离效率3%;入口为单相常温空气时,分流型芯管减低阻力系数近73%。Experimental and computational fluid dynamics were conducted to evaluate the effects of the slots area on the cyclone performance and flow field of the cyclone with slotted vortex finder. The results show that the flow ratio of gas running into the exhaust pipe through the slots on the vortex finder increases with the increase of the slots area, while the flow ratio changes to keep constant when the slots area ratio is more than 2.9. The short circuit flow ratio is reduced by the slotted vortex finder and keeps to be less than 5% of the inlet flow when the slots area ratio is more than 1.94. The tangential velocity, axial velocity and centripetal radial velocity in separation region decrease as the slots area increases. The cyclone separator pressure drop decreases with the increase of the slots area, and the slots area has greater influence on the pressure drop in the internal swirl region and in the exhaust tube. It was found that the optimal range of the slots area ratio is 1.94-2.9. The experimental results show that, when the inlet gas flow rate is 2380 m^^3·s^-1 and the inlet SiO2 particle concentration is 1 g ·m^3, the separator with slotted vortex finder has about 3% higher collection efficiency; and about 73% energy cost can be reduced by using the slotted vortex finder with the inlet gas flow rate of 1000~2500 m^3·s^-1.

关 键 词：分流型芯管 流场控制 开缝面积比 旋风管 

分 类 号：TQ051.8[化学工程]