Hydrodynamics and bubble behaviour in a three-phase two-stage internal loop airlift reactor

doi:10.1016/j.cjche.2018.03.020

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (6): 1359-1369.DOI: 10.1016/j.cjche.2018.03.020

• General reactor • 上一篇下一篇

Hydrodynamics and bubble behaviour in a three-phase two-stage internal loop airlift reactor

Dan Li^1,2, Kai Guo^1,2, Jingnan Li^1,2, Yiping Huang³, Junchao Zhou³, Hui Liu^1,2, Chunjiang Liu^1,2

1 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2 State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China;
3 China Construction Industrial & Energy Engineering Co., Ltd., Nanjing 210000, China

收稿日期:2017-11-23 修回日期:2018-03-15 出版日期:2018-06-28 发布日期:2018-08-03
通讯作者: Kai Guo,E-mail address:guokaitianjin@163.com;Chunjiang Liu,E-mail address:cjliu@tju.edu.cn
基金资助:
Supported by the State Key Laboratory of Chemical Engineering (SKL-ChE-16B01) and China Postdoctoral Science Foundation (2016M601263).

Hydrodynamics and bubble behaviour in a three-phase two-stage internal loop airlift reactor

Dan Li^1,2, Kai Guo^1,2, Jingnan Li^1,2, Yiping Huang³, Junchao Zhou³, Hui Liu^1,2, Chunjiang Liu^1,2

1 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2 State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China;
3 China Construction Industrial & Energy Engineering Co., Ltd., Nanjing 210000, China

Received:2017-11-23 Revised:2018-03-15 Online:2018-06-28 Published:2018-08-03
Contact: Kai Guo,E-mail address:guokaitianjin@163.com;Chunjiang Liu,E-mail address:cjliu@tju.edu.cn
Supported by:
Supported by the State Key Laboratory of Chemical Engineering (SKL-ChE-16B01) and China Postdoctoral Science Foundation (2016M601263).

摘要/Abstract

摘要： Local hydrodynamics of a gas-liquid-solid system, such as bubble circulation regime, gas holdup, liquid velocity and axial profile of solid concentration, are studied in a two-stage internal loop airlift reactor. Empirical correlations for gas holdup and liquid velocity are proposed to ease the reactor design and scale-up. Different bubble circulation regimes were displayed in the first (lower) and second (upper) stages. Increasing superficial gas velocity and solid loading can promote regime transition of the second stage, and the gas holdup of the second stage is higher than that of the lower stage. In addition, the effects of solid loading on bubble behaviour are experimentally investigated for each stage. It is found that bubble size in the downcomer decreases with the presence of solid particles, and bubble size distribution widens under higher superficial gas velocity and lower solid loading.

关键词: Two-stage internal loop airlift reactor, Hydrodynamics, Bubble, Multiphase flow

Abstract: Local hydrodynamics of a gas-liquid-solid system, such as bubble circulation regime, gas holdup, liquid velocity and axial profile of solid concentration, are studied in a two-stage internal loop airlift reactor. Empirical correlations for gas holdup and liquid velocity are proposed to ease the reactor design and scale-up. Different bubble circulation regimes were displayed in the first (lower) and second (upper) stages. Increasing superficial gas velocity and solid loading can promote regime transition of the second stage, and the gas holdup of the second stage is higher than that of the lower stage. In addition, the effects of solid loading on bubble behaviour are experimentally investigated for each stage. It is found that bubble size in the downcomer decreases with the presence of solid particles, and bubble size distribution widens under higher superficial gas velocity and lower solid loading.

Key words: Two-stage internal loop airlift reactor, Hydrodynamics, Bubble, Multiphase flow

Dan Li, Kai Guo, Jingnan Li, Yiping Huang, Junchao Zhou, Hui Liu, Chunjiang Liu. Hydrodynamics and bubble behaviour in a three-phase two-stage internal loop airlift reactor[J]. Chinese Journal of Chemical Engineering, 2018, 26(6): 1359-1369.

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Hydrodynamics and bubble behaviour in a three-phase two-stage internal loop airlift reactor

Hydrodynamics and bubble behaviour in a three-phase two-stage internal loop airlift reactor

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