期刊文献+

多层桨搅拌槽内的液-液分散特性 被引量:4

Liquid-liquid dispersion properties in a multi-blade agitated tank
下载PDF
导出
摘要 在直径为 0 4 76m的椭圆底圆柱形搅拌槽内 ,以水 /航空煤油及水 /环己烷为实验体系 ,研究了Rushton涡轮式搅拌桨 (RT - 6 )、六半椭圆管涡轮式搅拌桨 (HEDT)、折叶轴流式搅拌桨及翼形轴流式搅拌桨 (CBY)的 6种不同组合桨的液 -液分散特性 ,用取样法测定了分散相体积分数的轴向分布及体系澄清时间。结果表明 ,组合桨中的底桨在液 -液分散中发挥了主要作用。单位体积输入功率相同时 ,底桨为CBY的组合桨进行液 -液分散后 ,液滴的平均滴径最小 ,体系澄清时间较长 ;底桨为HEDT的组合桨的分散效果次之 ;底桨为RT - 6的组合桨因滴径分布较宽 ,虽然平均滴径最大 。 The liquid-liquid dispersion properties of six kinds of agitator blade combinations consisting of Rushton turbine(RT-6),half elliptical disk turbine(HEDT),small angle folded blade axial propeller and three blade hydrofoil propeller(CBY) were investigated with deionized water/aviation kerosene and deionized water/cyclohexane as liquid-liquid systems in a cylindrical agitated tank of 0.476 m diameter with elliptical bottom.The axial distribution of volume fraction of dispersion phase and clarification times were measured by sampling method.The results showed that the bottom agitator blade of combinations played a main role in liquid-liquid dispersion.The combination with bottom CBY had the smallest drop diameter and quite longer clarification time under the same power input per unit volume.The dispersion effect of combination with bottom HEDT took second place.The combination with bottom RT-6 had the largest drop diameter and longer clarification time with wide drop diameter distribution.
出处 《合成橡胶工业》 CAS CSCD 北大核心 2004年第5期272-276,共5页 China Synthetic Rubber Industry
关键词 搅拌桨 搅拌槽 液-液分散 均匀性指数 澄清时间 agitator blade agitated tank liquid-liquid dispersion uniform index clarification time
  • 相关文献

参考文献12

  • 1Zhou G W,Kresta S M. Evolution of drop size distribution in liquid-liquid dispersions for various impellers [J].Chemical Engineering Science, 1998,53 (11):2 099-2 113
  • 2Davies J T. Droplet sizes of emulsions related to turbulent energy dissipation rates [J].Chemcial Engineering Science, 1985,40(5):839-842
  • 3Pacek A W,Man C C,Nienow A W. On the Sauter mean diameter and size distributions in turbulent liquid-liquid dispersions in a stirred vessel[J].Chemical Engineering Science, 1998,53(11):2005-2011
  • 4Peters D C. Dynamics of emulsification[M].Oxford: ButterworthHeinemann, 1997. 294-321
  • 5Pacek A W,Chamsart S,Nienow A W,et al. The influence of impeller type on mean drop size and drop size distribution in an agitated vessel [J].Chemical Engineering Science, 1999,54 ( 19 ):4211 -4222
  • 6Zhou G W, Kresta S M. Correlation of mean drop size and minimum drop size with the turbulence energy dissipation and the flow in an agitated tank [ J ]. Chemical Engineering Science, 1998,53(11) :2 063 -2 079
  • 7Balmelli M, Steiner L, Hartland S. Behavior of turbulent dispersions in a stirred single-stage cell [ J ]. Chemical Engineering Science,2000,55(5) :1 653-1 660
  • 8Shimizu K, Minekawa K, Hirose T, et al. Drop breakage in stirred tanks with Newtonian and non-Newtonian fluid systems [J].Chemical Engineering Journal, 1999,72 ( 2 ): 117 - 124
  • 9Podgorska W,Baldyga J. Scale-up effects on the drop size distribution of liquid-liquid dispersions in agitated vessels [ J]. Chemical Engineering Science ,2001,56(3):741-746
  • 10Bakdyga J,Bourne J R,Pacek A W,et al. Effects of agitation and scale-up on drop size in turbulent dispersions allowance for intermittency [J].Chemical Engineering Science, 2001,56(11):3377-3385

二级参考文献2

  • 1韩杰,戴干策,陈敏恒.液滴大小分布作为反应器放大判据的研究[J]石油学报(石油加工),1986(03).
  • 2潘仁云,宋秋安,袁惠根.悬浮法聚苯乙烯的粒径和粒径分布[J]化工学报,1984(04).

共引文献4

同被引文献54

引证文献4

二级引证文献16

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部