• CN:11-2187/TH
  • ISSN:0577-6686

›› 2009, Vol. 45 ›› Issue (12): 84-88.

• 论文 • 上一篇    下一篇

基于内流场分析的机械搅拌式浮选机改型设计

韩伟;李仁年;杨瑞;李琪飞;唐堃;沈建锋   

  1. 兰州理工大学流体动力与控制学院
  • 发布日期:2009-12-15

Redesign of Mechanically Agitated Flotation Machine Based on Interior Flow Fields Simulation

HAN Wei;LI Rennian;YANG Rui;LI Qifei;TANG Kun;SHEN Jianfeng   

  1. College of Fluid Power and Control, Lanzhou University of Technology
  • Published:2009-12-15

摘要: 为了改善机械搅拌充气式浮选机的浮选动力学环境,使其具备良好的浮选效率,利用计算流体力学软件对有效容积为165 m3的机械搅拌式浮选机内部气固液三相流流场进行三维数值计算。分析原型机流场存在的问题,在此基础上根据浮选动力学性能要求对原浮选机进行改型设计。通过改变叶轮安放角、导叶和其他过流部件的结构参数等,来寻求分布合理的内流场,从而使改型后的机械搅拌式浮选机具有符合设计要求的浮选性能。改型后的浮选机具有更高的浮选效率,试验结果与模拟预测结果比较吻合,验证了改型设计的有效性。

关键词: 机械搅拌式浮选机 气固液三相流 数值计算, 内流场 改型设计, 板式换热器, 场协同, 导流区, 数值模拟

Abstract: In order to improve the flotation dynamical environment and efficiency of the mechanically agitated flotation machine, the numerical calculation on gas-solid-liquid three-phase three-dimension turbulent flow fields of the 165 m3 flotation is given with the computational fluid dynamics (CFD). The problems of the flow fields in prototype are analyzed, based on which the redesign is carried out on the basis of the flotation dynamical requirement. The flow fields meeting the flotation requirement is given by numerical simulation through changing the parameters of impeller setting angle, the relative position between guide vane and other flow passage components with the flotation cell. The flotation performances of the redesign are improved to meet the design requirements. The industrial experiments show that the redesign has higher efficiency than the prototype. The test results fit in with the simulation prediction result, which shows the validity of the redesign.

Key words: Gas-solid-liquid three-phase flow, Interior flow field, Mechanically agitated flotation machine, Numerical simulation, Redesign, distribution region, field synergy, numerical simulation, plate heat exchanger

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