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›› 2007, Vol. 7 ›› Issue (6): 1055-1059.

• 流动与传递 •    下一篇

连续高速分散混合器内的流体力学性能I-实验研究

董强,聂毅学,张华芹,高正明   

  1. 北京化工大学化学工程学院
  • 出版日期:2007-12-20 发布日期:2007-12-20

Hydrodynamic Characteristics in a Continuous Rotor-Stator Mixer-I. Experimental Investigation

DONG Qiang,NIE Yi-xue,ZHANG Hua-qin,GAO Zheng-ming   

  1. College of Chemical Engineering, Beijing University of Chemical Technology
  • Online:2007-12-20 Published:2007-12-20

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摘要： 针对3种不同结构的定子，采用不同粘度的牛顿流体及假塑性非牛顿流体作为工作介质，对连续高速分散混合器(CRS)内的流体力学性能进行了系统的实验研究，着重对CRS的功率特性、流体的表观Kolmogorov尺度进行了测定和分析. 结果表明，3号定子操作条件下的功率准数最大，为5.44；CRS的Metzner-Otto常数远大于普通搅拌桨；CRS内流体的表观Kolmogorov尺度比传统的搅拌反应器小一个数量级，因此CRS内的微观混合时间远小于搅拌反应器. 研究结果可为连续高速分散混合器的优化提供参考.

关键词: 连续高速分散混合器, 功率消耗, Kolmogorov特征尺度

Abstract: The hydrodynamic characteristics in a continuous rotor-stator mixer (CRS) with Newtonian and Non-Newtonian fluids were studied experimentally, and three different stators were used in the experiment. The power characteristics and Kolmogorov scale were measured and analyzed. The results show that the power number of stator type 3 is larger than that of stator types 1 and 2, the value is 5.44. The Metzner-Otto constant of CRS is larger than that of normal impellers. The Kolmogorov scale in the CRS is an order of magnitude smaller than that in a traditional stirred tank, so the CRS offers much shorter micro-mixing time than stirred tanks. The results are of importance to the optimization of industrial continuous rotor-stator mixers.

Key words: continuous rotor-stator mixer, power consumption, Kolmogorov scale