SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 34 ›› Issue (6): 22-31.DOI: 10.1016/j.cjche.2020.09.063

• Fluid Dynamics and Transport Phenomena • 上一篇    下一篇

Numerical simulation and experimental study of the characteristics of packing feature size on liquid flow in a rotating packed bed

Xifan Duan, Zhiguo Yuan, Youzhi Liu, Hangtian Li, Weizhou Jiao   

  1. Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, China
  • 收稿日期:2020-06-30 修回日期:2020-08-10 出版日期:2021-06-28 发布日期:2021-08-30
  • 通讯作者: Zhiguo Yuan
  • 基金资助:
    This work was supported by the Key Research & Development Plan of Shanxi Province (201903D321059) and Shanxi Scholarship Council of China (HGKY2019071).

Numerical simulation and experimental study of the characteristics of packing feature size on liquid flow in a rotating packed bed

Xifan Duan, Zhiguo Yuan, Youzhi Liu, Hangtian Li, Weizhou Jiao   

  1. Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, China
  • Received:2020-06-30 Revised:2020-08-10 Online:2021-06-28 Published:2021-08-30
  • Contact: Zhiguo Yuan
  • Supported by:
    This work was supported by the Key Research & Development Plan of Shanxi Province (201903D321059) and Shanxi Scholarship Council of China (HGKY2019071).

摘要: Rotating packed bed has high efficiency of gas–liquid mass transfer. So it is significant to investigate fluid motion in rotating packed bed. Numerical simulations of the effects of packing feature size on liquid flow characteristics in a rotating packed bed are reported in this paper. The particle image velocimetry is compared with the numerical simulations to validate the turbulent model. Results show that the liquid exists in the packing zone in the form of droplet and liquid line, and the cavity is droplet. When the radial thickness of the packing is less than 0.101 m, liquid line and droplets appear in the cavity. When rotational speed and radial thickness of the packing increase, the average diameter of the droplets becomes smaller, and the droplet size distribution becomes uniform. As the initial velocity of the liquid increases, the average droplet diameter increases and the uniformity of particle size distribution become worse. The droplet velocity increases with the radial thickness of the packing increasing, and gradually decreases when it reaches the cavity region. The effect of packing thickness is most substantial through linear fitting. The predicted and simulated values are within ±15%. The cumulative volume distribution curves of the experimental and simulated droplets are consistent with the R-R distribution.

关键词: Chemical process strengthening equipment, Rotating packed bed, Computational fluid dynamics, Particle image velocimetry, Sieve packing

Abstract: Rotating packed bed has high efficiency of gas–liquid mass transfer. So it is significant to investigate fluid motion in rotating packed bed. Numerical simulations of the effects of packing feature size on liquid flow characteristics in a rotating packed bed are reported in this paper. The particle image velocimetry is compared with the numerical simulations to validate the turbulent model. Results show that the liquid exists in the packing zone in the form of droplet and liquid line, and the cavity is droplet. When the radial thickness of the packing is less than 0.101 m, liquid line and droplets appear in the cavity. When rotational speed and radial thickness of the packing increase, the average diameter of the droplets becomes smaller, and the droplet size distribution becomes uniform. As the initial velocity of the liquid increases, the average droplet diameter increases and the uniformity of particle size distribution become worse. The droplet velocity increases with the radial thickness of the packing increasing, and gradually decreases when it reaches the cavity region. The effect of packing thickness is most substantial through linear fitting. The predicted and simulated values are within ±15%. The cumulative volume distribution curves of the experimental and simulated droplets are consistent with the R-R distribution.

Key words: Chemical process strengthening equipment, Rotating packed bed, Computational fluid dynamics, Particle image velocimetry, Sieve packing