SCI和EI收录∣中国化工学会会刊

›› 2014, Vol. 22 ›› Issue (11/12): 1179-1186.DOI: 10.1016/j.cjche.2014.09.019

• FLUID DYNAMICS AND TRANSPORT PHENOMENA •     Next Articles

Numerical Simulation of Liquid-Solid Countercurrent Fluidization inside an Extraction Column Based on Particle Trajectory Model

Zhongyuan Li1, Xingang Li1,2, Hong Sui1,2, Hong Li1,2   

  1. 1 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Collaborative Innovation Center of Chemical Science, Engineering National Engineering Research Centre for Distillation Technology, Tianjin 300072, China
  • Received:2013-12-23 Revised:2014-03-20 Online:2014-12-24 Published:2014-12-28
  • Supported by:
    Supported by the National Natural Science Foundation of China (21306129 and 41201497), and the Natural Science Foundation of Tianjin (12JCQNJC05300 and 11JCYBJC05400).

Numerical Simulation of Liquid-Solid Countercurrent Fluidization inside an Extraction Column Based on Particle Trajectory Model

Zhongyuan Li1, Xingang Li1,2, Hong Sui1,2, Hong Li1,2   

  1. 1 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2 Collaborative Innovation Center of Chemical Science, Engineering National Engineering Research Centre for Distillation Technology, Tianjin 300072, China
  • 通讯作者: Zhongyuan Li
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21306129 and 41201497), and the Natural Science Foundation of Tianjin (12JCQNJC05300 and 11JCYBJC05400).

Abstract: The liquid-solid countercurrent fluidization process in an extraction columnwas numerically simulated based on the particle trajectorymodel of Eulerian-Lagrangianmethod. The simulation approach was validated by previous experiments. A power function correlationwas proposed for dimensionless slip velocity Uslip/Ut and hold-up fraction ϕ, and the operational zone in the countercurrent fluidizationwas determined. Simultaneous countercurrent fluidization of particles with different diameters was also simulated. The comparison shows that the simulation results are consistentwith the calculation values fromthemulti-particle free sedimentation model based on noninterference assumption, verifying the reliability of the approach in present work.

Key words: Liquid-solid countercurrent extraction, Fluidization, Numerical simulation, Particle trajectory model

摘要: The liquid-solid countercurrent fluidization process in an extraction columnwas numerically simulated based on the particle trajectorymodel of Eulerian-Lagrangianmethod. The simulation approach was validated by previous experiments. A power function correlationwas proposed for dimensionless slip velocity Uslip/Ut and hold-up fraction ϕ, and the operational zone in the countercurrent fluidizationwas determined. Simultaneous countercurrent fluidization of particles with different diameters was also simulated. The comparison shows that the simulation results are consistentwith the calculation values fromthemulti-particle free sedimentation model based on noninterference assumption, verifying the reliability of the approach in present work.

关键词: Liquid-solid countercurrent extraction, Fluidization, Numerical simulation, Particle trajectory model