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Prediction of solids residence time distribution in cross-flow bubbling fluidized bed
Geng, Shujun1,2; Qian, Yanan1,2; Zhan, Jinhui1; Zhang, Hongling3; Xu, Guangwen1; Liu, Xiaoxing1,2
2017-10-01
发表期刊POWDER TECHNOLOGY
ISSN0032-5910
卷号320页码:555-564
摘要

Cross-flow bubbling fluidized beds (BFBs) have been widely used in dual fluidized bed systems such as chemical and heat looping. Understanding the residence characteristics of solids in such system is important for better design and optimization of reactors. Previously we experimentally measured the residence time distributions (RTDs) of sands in a cross-flow rectangular BFB by using coal particles as tracer. A computational investigation of solids RTD using multi-fluid Eulerian method combined with the species transport equation showed that the RTD of sands could be correctly represented by that of coal particles, and the simulation results well agreed with experimental data. Parametric studies demonstrated that, under the considered operation conditions, the influence of tracer injection time period on the predicted solid residence times was nearly ignorable. Simulation results revealed that in the investigated cross-flow BFB the solids RTD is closely related to solids inventory and solids flux. Through proper data processing, it was found that the descending part of solids RTD profile can be uniquely fitted by an empirical exponential function. A semi-empirical approach was thus developed and further validated, for the first time in the literature, to predict the entire profile of solids RID, in which the ascending part of solids RTD profile is obtained through CFD simulation whereas the descending part is given by the fitted empirical exponential function. (C) 2017 Elsevier B.V. All rights reserved.

关键词Solids Residence Time Distribution (Rtd) Bubbling Fluidized Bed Computational Fluidized Dynamics (Cfd) Semi-empirical Approach Dual Fluidized Bed
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.powtec.2017.07.085
收录类别SCI
语种英语
关键词[WOS]Cfd Simulation ; Fine Particles ; Riser ; Gas ; Gasification ; Reactor
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(21576265)
WOS记录号WOS:000411544800060
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/23250
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, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Southwest Jiaotong Univ, Sch Math, Chengdu 610031, Sichuan, Peoples R China
推荐引用方式
GB/T 7714
Geng, Shujun,Qian, Yanan,Zhan, Jinhui,et al. Prediction of solids residence time distribution in cross-flow bubbling fluidized bed[J]. POWDER TECHNOLOGY,2017,320:555-564.
APA Geng, Shujun,Qian, Yanan,Zhan, Jinhui,Zhang, Hongling,Xu, Guangwen,&Liu, Xiaoxing.(2017).Prediction of solids residence time distribution in cross-flow bubbling fluidized bed.POWDER TECHNOLOGY,320,555-564.
MLA Geng, Shujun,et al."Prediction of solids residence time distribution in cross-flow bubbling fluidized bed".POWDER TECHNOLOGY 320(2017):555-564.
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