CIESC Journal ›› 2013, Vol. 64 ›› Issue (2): 504-516.DOI: 10.3969/j.issn.0438-1157.2013.02.014

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Hydrodynamics in gas-liquid-solids circulating fluidized beds with low solids holdups

LIU Jianhua1, LIU Mingyan1,2, HU Zongding1   

  1. 1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2. State Key Laboratory of Chemical Engineering(Tianjin University), Tianjin 300072, China
  • Received:2012-06-19 Revised:2012-08-15 Online:2013-02-05 Published:2013-02-05
  • Supported by:

    supported by the National Natural Science Foundation of China(20576091).

低固含率气-液-固循环流化床流动特性

刘建华1, 刘明言1,2, 胡宗定1   

  1. 1. 天津大学化工学院,天津 300072;
    2. 化学工程联合国家重点实验室(天津大学),天津 300072
  • 通讯作者: 刘明言
  • 作者简介:刘建华(1981—),男,硕士。
  • 基金资助:

    国家自然科学基金项目(20576091)。

Abstract: Hydrodynamics in gas-liquid-solids circulating fluidized beds with low solids holdups of resin particles was experimentally investigated with a high-speed image measurement and treatment technique of complementary metal oxide semiconductor.Influences of superficial liquid velocity, particle diameter and density, liquid surface tension and viscosity on the phase holdups, average gas bubble diameter, circulating rate of solids particles both in the riser and in the downer and bubble motions were investigated. Experimental data with reasonable physical explanations of the hydrodynamics of gas-liquid-solids circulating fluidized beds were obtained.

Key words: macroporous resin particles, gas-liquid-solids, circulating fluidized bed, hydrodynamics, low solids holdup

摘要: 应用基于互补金属氧化物半导体(complementary metal oxide semiconductor,CMOS)传感器的高速图像采集和处理技术,实验研究了低固含率条件下,低密度大孔吸附树脂固体颗粒气-液-固三相循环流化床的流体力学行为,分析了操作条件、液相物性、颗粒性质等对床内的固体颗粒循环速率、相含率、气泡运动等特性的影响,得到了具有合理物理解释的实验数据和结果。

关键词: 大孔树脂颗粒, 气-液-固, 循环流化床, 动力学, 低固含率

CLC Number: