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Hydrodynamic and solids residence time distribution in a binary bubbling fluidized bed: 3D computational study coupled with the structure-based drag model
Zou, Zheng1; Zhao, Yun-long1,2; Zhao, Hu1,2; Zhang, Li-bo1,2; Xie, Zhao-hui1; Li, Hong-zhong1,2; Zhu, Qing-shan1,2
2017-08-01
发表期刊CHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
卷号321页码:184-194
摘要

The simulation of bubbling fluidized beds (BFB) residence time distribution (RTD) based on the structure based drag model are conducted for the single and binary gas-solid phases systems, a comparison of computed results with experimental data proves that our model is applicable to both systems with better accuracy. The revised drag coefficient (Hd) increases with decreasing the gas velocity or increasing the particle diameter. The increase of the feed rate could improve the solids flow pattern to be close to the plug flow, while increasing gas velocity or bed height would lead to a wider RTD. The particles in the binary mixture are in more diffusion-oriented movement so as to have less MRT (mean residence time) than that of the single system. The coarse particles with longer MRT are simulated to accumulate into the bed bottom with a slower vertical velocity. (C) 2017 Elsevier B.V. All rights reserved.

关键词Fluidization Rtd Structure-based Drag Model Binary Particles Drag Cfd
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.cej.2017.03.110
收录类别SCI
语种英语
关键词[WOS]Reynolds-number ; Multistage Fluidization ; Particle Segregation ; Bidisperse Arrays ; Granular Flow ; Simulation ; Mixtures ; Spheres ; Cfd ; Extension
WOS研究方向Engineering
WOS类目Engineering, Environmental ; Engineering, Chemical
项目资助者National Natural Science Foundation of China(21406237 ; State Key Development Program for Basic Research of China (973Program)(2015CB251402) ; 21325628)
WOS记录号WOS:000401041900020
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22530
专题多相复杂系统国家重点实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Zou, Zheng,Zhao, Yun-long,Zhao, Hu,et al. Hydrodynamic and solids residence time distribution in a binary bubbling fluidized bed: 3D computational study coupled with the structure-based drag model[J]. CHEMICAL ENGINEERING JOURNAL,2017,321:184-194.
APA Zou, Zheng.,Zhao, Yun-long.,Zhao, Hu.,Zhang, Li-bo.,Xie, Zhao-hui.,...&Zhu, Qing-shan.(2017).Hydrodynamic and solids residence time distribution in a binary bubbling fluidized bed: 3D computational study coupled with the structure-based drag model.CHEMICAL ENGINEERING JOURNAL,321,184-194.
MLA Zou, Zheng,et al."Hydrodynamic and solids residence time distribution in a binary bubbling fluidized bed: 3D computational study coupled with the structure-based drag model".CHEMICAL ENGINEERING JOURNAL 321(2017):184-194.
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