Micromixing characteristics in a gas-liquid-solid stirred tank with settling particles

Wanbo Li; Xingye Geng; Yuyun Bao; Zhengming Gao

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Micromixing characteristics in a gas-liquid-solid stirred tank with settling particles

流体力学与传递现象 | Updated：2026-01-06

- Micromixing characteristics in a gas-liquid-solid stirred tank with settling particles
- Chinese Journal of Chemical Engineering Vol. 23, Issue 3, Pages: 461-470(2015)
- Affiliations：
  
  State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology,Beijing,China,100029
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2015
- Accepted：
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Wanbo Li, Xingye Geng, Yuyun Bao, Zhengming Gao. Micromixing characteristics in a gas-liquid-solid stirred tank with settling particles[J]. , 2015, 23(3): 461-470.
DOI：

Wanbo Li, Xingye Geng, Yuyun Bao, Zhengming Gao. Micromixing characteristics in a gas-liquid-solid stirred tank with settling particles[J]. , 2015, 23(3): 461-470. DOI：

摘要

Abstract

The parallel-competing iodide-iodate reaction scheme was used to study the micromixing performance in a multi-phase stirred tank of 0.3m diameter. The impeller combination consisted of a half elliptical blade disk turbine below two down-pimping wide-blade hydrofoils

identified as HEDT+2WH

. Nitrogen and glass beads of 100 μm diameter and density 2500 kg·m

-3

were used as the dispersed phases. The micromixing could be improved by sparging gas because of its additional potential energy. Also

micromixing could be improved by the solid particles with high kinetic energy near the impeller tip. In a gas-solid-liquid system

the gas-liquid film vibrationwith damping

due to the frequent collisions between the bubbles and particles

led to the decrease of the turbulence level in the liquid and caused eventually the deterioration of themicromixing. A Damping Film Dissipation model is formulated to shed light on the above micromixing performances. At last

the micromixing time tm according to the incorporation model varied from 1.9 ms to 6.7 ms in our experiments.

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