两种不同入口形式的旋风分离器分离性能的对比研究
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摘要
采用数值模拟和实验研究的方法比较了不同进气量下,相同入口面积的Stairmand型和轴流导叶式旋风分离器的压降、分离效率和内部流场。结果表明,进气量648m~3/h时,轴流导叶式分离器内切向速度小于Stairmand分离器,进气量1080m~3/h时,轴流导叶式分离器切向速度较大;本实验条件下,轴流导叶式分离器可以明显增加内部流场的对称性和稳定性,削弱环形空间纵向环流和短路流现象;Stairmand型分离器分离效率随进气量先增大后减小,轴流导叶式分离器的效率则一直增加,且进气量小于1080 m~3/h时,Stairmand型分离器分离效率较高,进气量大于1080m~3/h时,轴流导叶式分离器分离效率较高;相同进气量下,轴流导叶式分离器压降基本小于Stairmand型分离器。
In this paper,pressure drop,collection efficiency and flow field of Stairmand type and axial guide vane cyclone separators with the same cross-area were studied numerically and experimentally.The results showed that with the flow rate of 648 m~3/h,the tangential velocity in the axial guide vane type cyclone was higher than that in the Stairmand type cyclone.While with the flow rate of 1080 m~3/h,the tangential velocity showed an opposite result. Under the experimental conditions,the symmetry and stability of the flow field were improved obviously in the axial guide vane cyclone separator,as well as the secondary flow and short circuit flow.The collection efficiency of the Stairmand type cyclone increased firstly and then decreased along with the flow rate. However,the collection efficiency of the guide vane type cyclone increased consistently with the flow rate.Furthermore,the collection efficiency of the Stairmand type cyclone was higher than that of the guide vane cyclone as the flow rate less than 900 m~3/h.With the flow rate higher than 900 m~3/h,the collection efficiency of the guide vane cyclone was higher than that of the Stairmand type cyclone.In addition,the pressure drop of the guide vane cyclone was generally smaller than that of the Stairmand type cyclone.
In this paper,pressure drop,collection efficiency and flow field of Stairmand type and axial guide vane cyclone separators with the same cross-area were studied numerically and experimentally.The results showed that with the flow rate of 648 m~3/h,the tangential velocity in the axial guide vane type cyclone was higher than that in the Stairmand type cyclone.While with the flow rate of 1080 m~3/h,the tangential velocity showed an opposite result. Under the experimental conditions,the symmetry and stability of the flow field were improved obviously in the axial guide vane cyclone separator,as well as the secondary flow and short circuit flow.The collection efficiency of the Stairmand type cyclone increased firstly and then decreased along with the flow rate. However,the collection efficiency of the guide vane type cyclone increased consistently with the flow rate.Furthermore,the collection efficiency of the Stairmand type cyclone was higher than that of the guide vane cyclone as the flow rate less than 900 m~3/h.With the flow rate higher than 900 m~3/h,the collection efficiency of the guide vane cyclone was higher than that of the Stairmand type cyclone.In addition,the pressure drop of the guide vane cyclone was generally smaller than that of the Stairmand type cyclone.
引文
[1]陈俊武.催化裂化工艺与工程(第2版)[M].北京:中国石化出版社,2005:228-230.
[2]王江云,毛羽,刘美丽,等.用改进的RNGκ-ε模型模拟旋风分离器内的强旋流动[J].石油学报(石油加工),2010,26(1):8-13.(WANG Jiangyun,MAO Yu,LIU Meili,et al.Numerical simulation of strongly swiring flow in cyclone separator by using an advanced RNGκ-εmodel[J].Acta Petrolei Sinica(Petroleum Processing Section),2010,26(1):8-13.)
[3]王江云,毛羽,王娟.单入口双进气道旋风分离器内流体的流动特性[J].石油学报(石油加工),2011,27(5):780-786.(WANG Jiangyun,MAO Yu,WANG Juan.Flow characteristic in a single inlet cyclone separator with double passage[J].Acta Petrolei Sinica(Petroleum Processing Section),2011,27(5):780-786.)
[4]李晓曼,宋健斐,魏志刚,等.入口颗粒浓度对旋风分离器压力降影响的实验分析[J].石油学报(石油加工),2015,31(6):1255-1261.(LI Xiaoman,SONG Jianfei,WEI Zhigang,et al.An experimental study of feed concentration effects on the pressure drop of cyclone[J].Acta Petrolei Sinica(Petroleum Processing Section),2015,31(6):1255-1261.
[5]高翠芝,孙国刚,董瑞倩.旋风分离器旋风长度的分析计算[J].石油学报(石油加工),2012,28(1):94-98.(GAO Cuizhi,SUN Guogang,DONG Ruiqian.Analysis calculation of the vortex length in a gas cyclone[J].Acta Petrolei Sinica(Petroleum Processing Section),2012,28(1):94-98.)
[6]高翠芝,孙国刚,董瑞倩.旋风分离器旋涡尾端位置的实验测量及其影响因素[J].石油学报(石油加工),2011,27(6):952-958.(GAO Cuizhi,SUN Guogang,DONG Ruiqian.Experimental measurement of the position of vortex end in cyclone and its effect factors[J].Acta Petrolei Sinica(Petroleum Processing Section),2011,27(6):952-958.)
[7]毛羽,时铭显.导叶式旋风子叶片参数的试验研究[J].华东石油学院学报:自然科学版,1985,(2):45-53.(MAO Yu,SHI Mingxian.On vane parameters of vane type cyclone tube[J].Journal of China University of Petroleum:Edition of Natural Science,1985,(2):45-53.)
[8]张荣克,廖仲武.多管第三级旋分器导向叶片参数的计算[J].石油化工设备,1987,26(3):19-24.(ZHANG Rongke,LIAO Zhongwu.Calculation of guide vane parameters on the third level of multitube separator[J].Petro-chemical Equipment,1987,26(3):19-24.)
[9]金有海,范超,毛羽,等.导叶式旋风管叶片参数设计方法的研究[J].化工机械,1999,26(1):21-24.(JIN Youhai,FAN Chao,MAO Yu,et al.Study on the design methods of vane parameters of vane-guided cyclone tubes[J].Chemical Machinery,1999,26(1):21-24.)
[10]金向红,金有海,王振波,等.导叶角度对轴流式气液旋流器分离性能的影响[J].石油机械,2008,36(2):1-5.(JIN Xianghong,JIN Youhai,WANG Zhenbo,et al.The influence of guide vane angle on the separation performance of axial flow type gas-liquid cyclone[J].China Petroleum Machinery,2008,36(2):1-5.)
[11]AKIYAMA T,MARUI T.Dust collection efficiency of a straight-through cyclone-effects of duct length,guide vanes and nozzle angle for secondary rotational air flow[J].Powder Technology,1989,58:181-185.
[12]COMAS M,COMAS J,CHETRIT C,et al.Cyclone pressure drop and efficiency with and without an inlet vane[J].Powder Technology,1991,66(2):143-148.
[13]LI Q,XU W,WANG J,et al.Performance evaluation of a new cyclone separator-part I Experimental results[J].Separation&Purification Technology,2015,141:53-58.
[14]郭颖,王建军,金有海.轴流导叶式旋风管内气固两相流的实验研究[J].中国石油大学学报:自然科学版,2005,29(3):96-100.(GUO Ying,WANG Jianjun,JIN Youhai.Experimental study of gas-solid two-phase flow in axial guide vane cyclone tube[J].Journal of China University of Petroleum(Edition of Natural Science),2005,29(3):96-100.)
[15]陈敬东,段行知,谢云杰,等.叶片数量对导叶式旋风管流场的影响分析[J].石油化工设备,2016,45(2):11-16.(CHEN Jingdong,DUAN Xingzhi,XIE Yunjie,et al.Impact analysis on the fluid field in guide vane cyclone tube with different number of vanes[J].Petrochemical Equipment,2016,45(2):11-16.)
[16]XU W,LI Q,WANG J,et al.Performance evaluation of a new cyclone separator-part II simulation results[J].Separation&Purification Technology,2016,160:112-116.
[17]付双成,孙国刚,高翠芝.导叶式直流旋风分离器的研究与应用现状[J].过滤与分离,2008,18(2):11-13.(FU Shuangcheng,SUN Guogang,GAO Cuizhi.Research and application status of guide vanes uniflow cyclone[J].Journal of Filtration&Separation,2008,18(2):11-13.)
[18]CHAO Z,SUN G,JIAO J,et al.Gas flow behavior and residence time distribution in a rough-cut cyclone[J].Chemical Engineering Journal,2005,106(1):43-52.
[19]JIAO J,LIU Z,ZHENG Y.Evaluations and modifications on Reynolds stress model in cyclone simulations[J].Chemical Engineering&Technology,2010,30(1):15-20.
[20]SHUKLA S K,SHUKLA P,GHOSH P.Evaluation of numerical schemes using different simulation methods for the continuous phase modeling of cyclone separators[J].Advanced Powder Technology,2011,22(2):209-219.
[21]YANG J,SUN G,ZHAN M.Prediction of the maximum efficiency inlet velocity in cyclones[J].Powder Technology,2015,286(11):124-131.
[22]孟文,王江云,毛羽,等.排气管直径对旋分器非轴对称旋转流场的影响[J].石油学报(石油加工),2015,31(6):1309-1316.(MENG Wen,WANG Jiangyun,MAO Yu,et al.Effect of vortex finder diameter on nonaxisymmetric rotating flow field in cyclone separator[J].Acta Petrolei Sinica(Petroleum Processing Section),2015,31(6):1309-1316.)
[2]王江云,毛羽,刘美丽,等.用改进的RNGκ-ε模型模拟旋风分离器内的强旋流动[J].石油学报(石油加工),2010,26(1):8-13.(WANG Jiangyun,MAO Yu,LIU Meili,et al.Numerical simulation of strongly swiring flow in cyclone separator by using an advanced RNGκ-εmodel[J].Acta Petrolei Sinica(Petroleum Processing Section),2010,26(1):8-13.)
[3]王江云,毛羽,王娟.单入口双进气道旋风分离器内流体的流动特性[J].石油学报(石油加工),2011,27(5):780-786.(WANG Jiangyun,MAO Yu,WANG Juan.Flow characteristic in a single inlet cyclone separator with double passage[J].Acta Petrolei Sinica(Petroleum Processing Section),2011,27(5):780-786.)
[4]李晓曼,宋健斐,魏志刚,等.入口颗粒浓度对旋风分离器压力降影响的实验分析[J].石油学报(石油加工),2015,31(6):1255-1261.(LI Xiaoman,SONG Jianfei,WEI Zhigang,et al.An experimental study of feed concentration effects on the pressure drop of cyclone[J].Acta Petrolei Sinica(Petroleum Processing Section),2015,31(6):1255-1261.
[5]高翠芝,孙国刚,董瑞倩.旋风分离器旋风长度的分析计算[J].石油学报(石油加工),2012,28(1):94-98.(GAO Cuizhi,SUN Guogang,DONG Ruiqian.Analysis calculation of the vortex length in a gas cyclone[J].Acta Petrolei Sinica(Petroleum Processing Section),2012,28(1):94-98.)
[6]高翠芝,孙国刚,董瑞倩.旋风分离器旋涡尾端位置的实验测量及其影响因素[J].石油学报(石油加工),2011,27(6):952-958.(GAO Cuizhi,SUN Guogang,DONG Ruiqian.Experimental measurement of the position of vortex end in cyclone and its effect factors[J].Acta Petrolei Sinica(Petroleum Processing Section),2011,27(6):952-958.)
[7]毛羽,时铭显.导叶式旋风子叶片参数的试验研究[J].华东石油学院学报:自然科学版,1985,(2):45-53.(MAO Yu,SHI Mingxian.On vane parameters of vane type cyclone tube[J].Journal of China University of Petroleum:Edition of Natural Science,1985,(2):45-53.)
[8]张荣克,廖仲武.多管第三级旋分器导向叶片参数的计算[J].石油化工设备,1987,26(3):19-24.(ZHANG Rongke,LIAO Zhongwu.Calculation of guide vane parameters on the third level of multitube separator[J].Petro-chemical Equipment,1987,26(3):19-24.)
[9]金有海,范超,毛羽,等.导叶式旋风管叶片参数设计方法的研究[J].化工机械,1999,26(1):21-24.(JIN Youhai,FAN Chao,MAO Yu,et al.Study on the design methods of vane parameters of vane-guided cyclone tubes[J].Chemical Machinery,1999,26(1):21-24.)
[10]金向红,金有海,王振波,等.导叶角度对轴流式气液旋流器分离性能的影响[J].石油机械,2008,36(2):1-5.(JIN Xianghong,JIN Youhai,WANG Zhenbo,et al.The influence of guide vane angle on the separation performance of axial flow type gas-liquid cyclone[J].China Petroleum Machinery,2008,36(2):1-5.)
[11]AKIYAMA T,MARUI T.Dust collection efficiency of a straight-through cyclone-effects of duct length,guide vanes and nozzle angle for secondary rotational air flow[J].Powder Technology,1989,58:181-185.
[12]COMAS M,COMAS J,CHETRIT C,et al.Cyclone pressure drop and efficiency with and without an inlet vane[J].Powder Technology,1991,66(2):143-148.
[13]LI Q,XU W,WANG J,et al.Performance evaluation of a new cyclone separator-part I Experimental results[J].Separation&Purification Technology,2015,141:53-58.
[14]郭颖,王建军,金有海.轴流导叶式旋风管内气固两相流的实验研究[J].中国石油大学学报:自然科学版,2005,29(3):96-100.(GUO Ying,WANG Jianjun,JIN Youhai.Experimental study of gas-solid two-phase flow in axial guide vane cyclone tube[J].Journal of China University of Petroleum(Edition of Natural Science),2005,29(3):96-100.)
[15]陈敬东,段行知,谢云杰,等.叶片数量对导叶式旋风管流场的影响分析[J].石油化工设备,2016,45(2):11-16.(CHEN Jingdong,DUAN Xingzhi,XIE Yunjie,et al.Impact analysis on the fluid field in guide vane cyclone tube with different number of vanes[J].Petrochemical Equipment,2016,45(2):11-16.)
[16]XU W,LI Q,WANG J,et al.Performance evaluation of a new cyclone separator-part II simulation results[J].Separation&Purification Technology,2016,160:112-116.
[17]付双成,孙国刚,高翠芝.导叶式直流旋风分离器的研究与应用现状[J].过滤与分离,2008,18(2):11-13.(FU Shuangcheng,SUN Guogang,GAO Cuizhi.Research and application status of guide vanes uniflow cyclone[J].Journal of Filtration&Separation,2008,18(2):11-13.)
[18]CHAO Z,SUN G,JIAO J,et al.Gas flow behavior and residence time distribution in a rough-cut cyclone[J].Chemical Engineering Journal,2005,106(1):43-52.
[19]JIAO J,LIU Z,ZHENG Y.Evaluations and modifications on Reynolds stress model in cyclone simulations[J].Chemical Engineering&Technology,2010,30(1):15-20.
[20]SHUKLA S K,SHUKLA P,GHOSH P.Evaluation of numerical schemes using different simulation methods for the continuous phase modeling of cyclone separators[J].Advanced Powder Technology,2011,22(2):209-219.
[21]YANG J,SUN G,ZHAN M.Prediction of the maximum efficiency inlet velocity in cyclones[J].Powder Technology,2015,286(11):124-131.
[22]孟文,王江云,毛羽,等.排气管直径对旋分器非轴对称旋转流场的影响[J].石油学报(石油加工),2015,31(6):1309-1316.(MENG Wen,WANG Jiangyun,MAO Yu,et al.Effect of vortex finder diameter on nonaxisymmetric rotating flow field in cyclone separator[J].Acta Petrolei Sinica(Petroleum Processing Section),2015,31(6):1309-1316.)