Numerical study of particle injection into a gas-solid fluidized bed

被引：7

作者：

Liu, Ying ^{[1
]}

Tian, Sihang ^{[1
]}

Li, Shaoshuo ^{[1
]}

Yang, Yao ^{[1
]}

Huang, Zhengliang ^{[1
]}

Sun, Jingyuan ^{[1
]}

Liao, Zuwei ^{[1
]}

Wang, Jingdai ^{[1
]}

Yang, Yongrong ^{[1
]}

Yang, Jian ^{[2
]}

机构：

[1] Zhejiang Univ, Coll Chem & Biol Engn, State Key Lab Chem Engn, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Coll Chem & Biol Engn, Inst Pharmaceut Engn, Hangzhou 310027, Peoples R China

来源：

POWDER TECHNOLOGY | 2020年 / 360卷

基金：

中国国家自然科学基金;

关键词：

Computational fluid dynamics; Gas-solid fluidized bed; Particle injection; Flow behaviors; Solid mixing; X-RAY; CIRCULATION PATTERNS; BUBBLE DIAMETER; FLOW; CFD; JET;

D O I：

10.1016/j.powtec.2019.09.010

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The flow and dispersion behaviors of the fine particle injection in a gas-solid fluidized bed were studied numerically based on the two-dimensional multi-fluid model. The injection path and flow pattern of the flotsam solids were investigated. A distinct pair of counter-rotating vortices of flotsam particles appeared in the middle and upper parts of the fluidized bed. Higher injection rate was preferred for faster flotsam dispersion. The effects of flotsam injection on bed hydrodynamics were investigated with regard to the velocity distribution and volume fraction of bulk materials and the bubble size. Consequently, the mixing properties of the flotsam particles and bulk solids were quantified by the fluid-free flotsam fraction profile and the standard deviation. The fluidized bed was mixed acceptably with modest local segregation for all the conditions simulated. Lower injection velocity made contributions to better mixing especially for the duration of injection. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：835 / 845

页数：11

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