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›› 2011, Vol. 11 ›› Issue (6): 901-906.

• 流动与传递 •    下一篇

三相浅层鼓泡塔颗粒悬浮特性

蔡清白 戴干策   

  1. 上海华谊集团技术研究院 过程开发研究所 华东理工大学化学工程联合国家重点实验室
  • 收稿日期:2011-09-20 修回日期:2011-10-26 出版日期:2011-12-20 发布日期:2011-12-20
  • 通讯作者: 蔡清白

Solid Suspension Characteristics in a Three-phase Shallow Bubble Column

CAI Qing-bai DAI Gan-ce   

  1. Technology Research Institute of Shanghai HuaYi Group State Key Laboratory of Chemical Engineering, East China University of Science and Technology
  • Received:2011-09-20 Revised:2011-10-26 Online:2011-12-20 Published:2011-12-20
  • Contact: CAI Qing-bai

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被引次数

6

摘要： 研究了F383 mm的浅层鼓泡塔内高径比(H/DT)、气体分布器、固体浓度(Cs)对气含率和临界悬浮气速(Ugc)的影响. 结果表明，当H/DT<1.5时，随H/DT增大，气含率增大，而Ugc明显下降；当H/DT>1.5时，气含率减小，Ugc变化不大，优化的H/DT约为1.5. 采用四管管式气体分布器，当环径比(d/DT)为0.4时，Ugc最小. 气含率随Cs增大而减小，Cs超过15%(j)时，Ugc随Cs变化不大. 最后，推导得到Ugc的经验关联式，可为工业反应器提供一定指导.

关键词: 浅层鼓泡塔, 临界悬浮气速, 气含率, 高径比, 气体分布器

Abstract: The influences of aspect ratio (H/DT), gas sparger and solid concentration (Cs) on gas holdup and critical gas velocity of solid suspension (Ugc) were investigated in a 383 mm i.d. three-phase shallow bubble column. The results show that when H/DT is smaller than 1.5, gas holdup increases and Ugc decreases with the increase of H/DT. However, when H/DT is larger than 1.5, the effect of H/DT on Ugc is insignificant. Gas sparger has great effect on Ugc, when d/DT is equal to 0.4, the value of Ugc is minimum. Gas holdup decreases with the increase of Cs. The effect of Cs on Ugc is insignificant, when Cs is larger than 15%(j). Finally, the empirical correlation is proposed to describe their quantitative effects on Ugc to give some physical insights into the experimental phenomenon.

Key words: shallow bubble column, critical suspension gas velocity, gas holdup, aspect ratio, gas sparger

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