SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (6): 1423-1429.DOI: 10.1016/j.cjche.2018.04.026

• General reactor • 上一篇    下一篇

Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles

Yanhong Zhang, Zhengwei Zhang, Chenwen Wei, Hualin Wang   

  1. East China University of Science and Technology, Shanghai 200237, China
  • 收稿日期:2017-09-19 修回日期:2018-04-18 出版日期:2018-06-28 发布日期:2018-08-03
  • 通讯作者: Hualin Wang,E-mail address:wanghl@ecust.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51308215).

Critical impeller speeds for a gas-inducing stirring tank loaded with solid particles

Yanhong Zhang, Zhengwei Zhang, Chenwen Wei, Hualin Wang   

  1. East China University of Science and Technology, Shanghai 200237, China
  • Received:2017-09-19 Revised:2018-04-18 Online:2018-06-28 Published:2018-08-03
  • Contact: Hualin Wang,E-mail address:wanghl@ecust.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China (51308215).

摘要: The influence of solid particles size, density and loading on the critical gas-inducing impeller speed was investigated in a gas-liquid-solid stirring tank equipped with a hollow Rushton impeller. Three types of solid particles, hollow glass beads with diameters of 300 μm, 200 μm, 100 μm, and 60 μm, silica gel and desalting resin, were used. It was found that the adding solid particles would change the critical impeller speed. For hollow glass beads and silica gel, whose relative densities were less than or equal to 1.5, the critical impeller speeds increased with the solid loading before reaching the maximum values, and then decreased to a value even lower than that without added solids. The size of the solids also had apparent influence on the critical impeller speed, and larger solid particles correspond to a smaller critical impeller speed. The experimental data also showed that the gasinducing was beneficial to the suspension of the solid particles.

关键词: Critical gas-induction impeller speed Gas-inducting impeller, Gas-liquid-solid, Multiphase reactor, Solid loading

Abstract: The influence of solid particles size, density and loading on the critical gas-inducing impeller speed was investigated in a gas-liquid-solid stirring tank equipped with a hollow Rushton impeller. Three types of solid particles, hollow glass beads with diameters of 300 μm, 200 μm, 100 μm, and 60 μm, silica gel and desalting resin, were used. It was found that the adding solid particles would change the critical impeller speed. For hollow glass beads and silica gel, whose relative densities were less than or equal to 1.5, the critical impeller speeds increased with the solid loading before reaching the maximum values, and then decreased to a value even lower than that without added solids. The size of the solids also had apparent influence on the critical impeller speed, and larger solid particles correspond to a smaller critical impeller speed. The experimental data also showed that the gasinducing was beneficial to the suspension of the solid particles.

Key words: Critical gas-induction impeller speed Gas-inducting impeller, Gas-liquid-solid, Multiphase reactor, Solid loading