内嵌滤筒结构气固旋流分离器除尘的数值模拟
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摘要
为提高旋流分离器的气固分离性能,提出了一种内嵌滤筒结构的旋流分离器。利用FLUENT中的RSM、DPM和多孔介质模型,对内嵌滤筒式结构旋流分离器的除尘原理进行数值模拟,并从速度分布和分离效率入手,与Stairmand型传统旋流分离器做了对比分析,分析结果表明:内嵌滤筒结构旋流分离器的分离性能大幅提高,可以实现直径小于5μm颗粒的分离。结果体现出了内嵌滤筒结构旋流分离器具有重要的工程价值,为旋流分离器的结构优化提供了参考。
In order to improve the gas-solid separation performance of cyclone separator,a type of cyclone with embedded filter structure was proposed.The dust removal mechanism of the cyclone with embedded filter structure was numerical simulated by using RSM,DPM and porous model in FLUENT,and was compared with the traditional Stairmand cyclone in both speed distribution and separation efficiency.The result showed that the separation performance of the cyclone with embedded filter structure was increased greatly.Separation of particles smaller than 5 microns in diameter can be achieved.This result reflects that the cyclone with embedded filter structure has important practical engineering value,and the paper can provide some reference for structural optimization of cyclone.
In order to improve the gas-solid separation performance of cyclone separator,a type of cyclone with embedded filter structure was proposed.The dust removal mechanism of the cyclone with embedded filter structure was numerical simulated by using RSM,DPM and porous model in FLUENT,and was compared with the traditional Stairmand cyclone in both speed distribution and separation efficiency.The result showed that the separation performance of the cyclone with embedded filter structure was increased greatly.Separation of particles smaller than 5 microns in diameter can be achieved.This result reflects that the cyclone with embedded filter structure has important practical engineering value,and the paper can provide some reference for structural optimization of cyclone.
引文
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[13]杨晓惠,刘仁桓,金有海.旋流过滤器的结构与性能研究[J].流体机械,2008,36(5):10-13.
[2]黄兴华,王道连,王如竹,等.旋风分离器中气相流动特性及颗粒分离效率的数值研究[J].动力工程,2004,24(3):436-441.
[3]廉继尧,夏凤毅,沈洲.新型复合除尘器的设计及数值模拟[J].中国计量学院学报,2015,26(1):70-74.
[4]李志华,焦雷,李州.新型旋风-布袋组合式除尘器的除尘机理及数值模拟[J].硫磷设计与粉体工程,2012(1):30-33.
[5]Strauser D P,Troutt S S,Stein P W.Debris separation and filtration systems:U.S.Patent,6 887 290[P].2005-05-03.
[6]马云霜,郭明亮,艾景良.浅谈旋风分离器结构优化改造[J].纯碱工业,2012(1):19-20.
[7]唐守强.基于CFD的旋风分离器性能参数影响研究[D].淄博:山东理工大学,2015.
[8]翟会琴,许朋,邱冰冰,等.体积流量对旋风分离器影响的模拟分析[J].安徽工业大学学报:自然科学版,2013(1):34-37.
[9]K?pa A.Division of outlet flow in a cyclone vortex finder-The CFDcalculations[J].Separation and Purification Technology,2010,75(2):127-131.
[10]Hreiz R,Gentric C,Midoux N.Numerical investigation of swirling flow in cylindrical cyclones[J].Chemical engineering research and design,2011,89(12):2521-2539.
[11]Fassani F L,Goldstein Jr L.A study of the effect of high inlet solids loading on a cyclone separator pressure drop and collection efficiency[J].Powder Technology,2000,107(1-2):60-65.
[12]吴秀华.新型旋风--布袋一体式除尘器的数值模拟及应用研究[J].华中科技大学,2016:1-z.
[13]杨晓惠,刘仁桓,金有海.旋流过滤器的结构与性能研究[J].流体机械,2008,36(5):10-13.