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›› 2005, Vol. 5 ›› Issue (2): 139-143.

• 流动与传递 • 上一篇    下一篇

再分布板和径向挡板对淤浆鼓泡床流体力学特性的影响

孙淑兰,刘昌见,魏伟胜,鲍晓军   

  1. 石油大学
  • 出版日期:2005-04-20 发布日期:2005-04-20

Influence of Resdistributors and Baffles on Hydrodynamics of Slurry Bubble Column Reactors

SUN Shu-lan,LIU Chang-jian,WEI Wei-sheng,BAO Xiao-jun   

  1. Key Laboratory of Catalysis, China National Petroleum Co., University of Petroleum
  • Online:2005-04-20 Published:2005-04-20

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摘要： 研究了在以空气-水-石英砂为实验体系的淤浆鼓泡床中加入内构件?再分布板和径向挡板对床层气含率和固含率的影响，并与不加内构件的情况进行了对比. 实验结果表明，再分布板可明显提高床层的平均气含率，且开孔孔径越小，作用越显著；但径向挡板的作用不明显；再分布板和径向挡板均可改善气含率和固含率的轴向分布，且不会大幅度增加压降. 通过对Smith关联式进行修正，得到了带有再分布板的淤浆鼓泡床中床层平均气含率的经验关联式.

关键词: 淤浆鼓泡床, 内构件, 流体力学, 气含率, 固含率

Abstract: The effects of redistributors and baffles with different geometry on average gas holdup, solid holdup and gas axial profiles of an air-water-quartz sand three-phase system were investigated in a slurry bubble column reactor of 0.1 m in I.D. and 2.0 m in height. The results showed that the redistributors could significantly increase the average gas holdup in the reactor, but baffles had no obvious effect. The increase in average gas holdup by introducing the redistributors was found to depend upon the hole size and opening fraction of the perforated redistributors. It was also found that both redistributors and baffles could improve the uniformity of the axial profiles of gas and solid holdup with only small increase in pressure drop. Based on the correlation due to Smith, an empirical correlation for the average gas holdup in slurry bubble columns with redistributor was obtained.

Key words: slurry bubble column, internals, hydrodynamics, gas holdup, solid holdup