提升水力旋流器的混合沙粒分离效果研究
|
摘要
在水力旋流器固体混合物的分离过程中,内部流场复杂,分离机理尚不明确,效果难以提升。通过对直径为50μm和100μm两种沙粒在混合情况下的分离效果进行了数值模拟,模拟中两种沙粒每秒的投放个数均为2 000个。模拟结果显示直径为100μm的沙粒均从沉沙口分离出去,粒径为50μm的沙粒从溢流口排出的个数占总个数的15.25%。通过对旋流器圆柱段靠近圆锥的位置处设置圆心方向高度为0.2 mm的45°坡度面后,粒径为100μm的沙粒分离效果没有变化,粒径为50μm的沙粒从溢流口排出占总体颗粒个数的25.6%,实验证实设置坡度面能提高沙粒的分离效果。
The complex flow field inside cyclone hydrocyclone and solid mixture separation process leads to the separation mechanism is studied based on the diameters of 50 μm and 100 μm by the numerical simulation.The amount of particle is 2 000 per second. Simulation results show that the diameter of 100 μm particles from sand and separating particles 50 μm excluded from the overflow port number of the station with a total number of 15. 25%. The gradient of cyclone near the end of the conical cylindrical surface is set up,and increased the probability of mixed particles into the separation zone. Simulation result showed that 25. 6% particle size is50 μm from the station,and the overall number of particles from the overflow port. According to the research of hydrocyclone flow characteristics and separation mechanism,the separation effect by setting the slope near the cone cylinder is significantly higher mixed particles,this study provides a new solution for the separation of mixed particles.
The complex flow field inside cyclone hydrocyclone and solid mixture separation process leads to the separation mechanism is studied based on the diameters of 50 μm and 100 μm by the numerical simulation.The amount of particle is 2 000 per second. Simulation results show that the diameter of 100 μm particles from sand and separating particles 50 μm excluded from the overflow port number of the station with a total number of 15. 25%. The gradient of cyclone near the end of the conical cylindrical surface is set up,and increased the probability of mixed particles into the separation zone. Simulation result showed that 25. 6% particle size is50 μm from the station,and the overall number of particles from the overflow port. According to the research of hydrocyclone flow characteristics and separation mechanism,the separation effect by setting the slope near the cone cylinder is significantly higher mixed particles,this study provides a new solution for the separation of mixed particles.
引文
[1]王岩.宽域水力旋流器液—固分离性能研究[J].中国设备工程,2017(7):102-103.
[2]杨博文,郑小涛,周瀚浩文,等.旋流分离器液固分离数值模拟研究[J].化学工程与装备,2017(2):16-19.
[3]刘培坤,牛志勇,杨兴华,等.微型旋流器对超细颗粒的分离性能[J].中国粉体技术,2016,22(6):1-6.
[4]喻黎明,邹小艳,谭弘,等.基于CFD-DEM耦合的水力旋流器水沙运动三维数值模拟[J].农业机械学报,2016,47(1):126-132.
[5]刘鸿雁,王亚,韩天龙,等.水力旋流器溢流管结构对微细颗粒分离的影响[J].化工学报,2017,68(5):1921-1931.
[6]刘永平,龚俊,刘晶.黄河水泥沙分离用水力旋流器分离效率的研究[J].排灌机械,2006(5):33-35.
[7]张晓光,赵立新,徐保蕊,等.锥角变化对旋流除砂性能影响的数值模拟[J].化工机械,2016,43(6):798-802.
[8]崔瑞,王光辉,李茂林.锥体结构对水力旋流器内流场及分离性能的影响[J].矿山机械,2014,42(4):83-87.
[9]张恒,王卫兵,冯静安,等.中心锥对水力旋流器性能影响[J].矿业研究与开发,2016,36(8):81-84.
[10]刘杨,王振波.水力旋流器分离效率影响因素的研究进展[J].流体机械,2016,44(2):39-42.
[11]陈雷雷.除砂旋流器分离效率试验研究[J].机械研究与应用,2014,27(6):67-68.
[12]张翠婷.探讨入口角度对水力旋流器流场的影响[J].科技与企业,2014(24):179.
[13]宫振宇,张妍君,鄂承林,等.水力旋流器的底流口直径对其分离性能的影响[J].化学反应工程与工艺,2014,30(5):463-470.
[14]王军,陈宁.水力旋流器油-水分离性能数值模拟[J].机电设备,2014,31(2):14-18.
[15]蔚志恒,姚绍武,张文彬,等.矿用泥沙分级水力旋流器的压力调控研究[J].中国矿业,2014,23(2):130-132+141.
[16]赵庆国,李伟卿,何伟.新型固液旋流器压降特性实验研究[J].工程热物理学报,2010,31(1):61-63.
[17]傅进军.固液旋流器分离效率影响因素分析[J].科学技术与工程,2009,9(18):5576-5581.
[18]陈景仁.流体力学及传热学[M].北京:国防工业出版社,1984.
[19]Tong Z B,Yang R Y,Chu K W,et al.Numerical study of effect of particle size and polydispersity on the agglomerate dispersion in a cyclonic flow[J].Chemical Engineering Journal,2010,164(3):432-441.
[20]Chu K W,Wang B,Yu A B,et al.CFD-DEM modelling of multiphase flow in dense medium cyclones[J].Powder Technology,2009,193:235-247.
[21]Tang X L,Yu X,Ren S C,et al.Solid-liquid two phase liquid hydrodynamics and its application in hydraulic machinery[M].Zhengzhou:the Yellow River Water Power Press,2006.
[2]杨博文,郑小涛,周瀚浩文,等.旋流分离器液固分离数值模拟研究[J].化学工程与装备,2017(2):16-19.
[3]刘培坤,牛志勇,杨兴华,等.微型旋流器对超细颗粒的分离性能[J].中国粉体技术,2016,22(6):1-6.
[4]喻黎明,邹小艳,谭弘,等.基于CFD-DEM耦合的水力旋流器水沙运动三维数值模拟[J].农业机械学报,2016,47(1):126-132.
[5]刘鸿雁,王亚,韩天龙,等.水力旋流器溢流管结构对微细颗粒分离的影响[J].化工学报,2017,68(5):1921-1931.
[6]刘永平,龚俊,刘晶.黄河水泥沙分离用水力旋流器分离效率的研究[J].排灌机械,2006(5):33-35.
[7]张晓光,赵立新,徐保蕊,等.锥角变化对旋流除砂性能影响的数值模拟[J].化工机械,2016,43(6):798-802.
[8]崔瑞,王光辉,李茂林.锥体结构对水力旋流器内流场及分离性能的影响[J].矿山机械,2014,42(4):83-87.
[9]张恒,王卫兵,冯静安,等.中心锥对水力旋流器性能影响[J].矿业研究与开发,2016,36(8):81-84.
[10]刘杨,王振波.水力旋流器分离效率影响因素的研究进展[J].流体机械,2016,44(2):39-42.
[11]陈雷雷.除砂旋流器分离效率试验研究[J].机械研究与应用,2014,27(6):67-68.
[12]张翠婷.探讨入口角度对水力旋流器流场的影响[J].科技与企业,2014(24):179.
[13]宫振宇,张妍君,鄂承林,等.水力旋流器的底流口直径对其分离性能的影响[J].化学反应工程与工艺,2014,30(5):463-470.
[14]王军,陈宁.水力旋流器油-水分离性能数值模拟[J].机电设备,2014,31(2):14-18.
[15]蔚志恒,姚绍武,张文彬,等.矿用泥沙分级水力旋流器的压力调控研究[J].中国矿业,2014,23(2):130-132+141.
[16]赵庆国,李伟卿,何伟.新型固液旋流器压降特性实验研究[J].工程热物理学报,2010,31(1):61-63.
[17]傅进军.固液旋流器分离效率影响因素分析[J].科学技术与工程,2009,9(18):5576-5581.
[18]陈景仁.流体力学及传热学[M].北京:国防工业出版社,1984.
[19]Tong Z B,Yang R Y,Chu K W,et al.Numerical study of effect of particle size and polydispersity on the agglomerate dispersion in a cyclonic flow[J].Chemical Engineering Journal,2010,164(3):432-441.
[20]Chu K W,Wang B,Yu A B,et al.CFD-DEM modelling of multiphase flow in dense medium cyclones[J].Powder Technology,2009,193:235-247.
[21]Tang X L,Yu X,Ren S C,et al.Solid-liquid two phase liquid hydrodynamics and its application in hydraulic machinery[M].Zhengzhou:the Yellow River Water Power Press,2006.