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 | |
刊名 | POWDER TECHNOLOGY |
2017-10-01 | |
卷号 | 320页码:555-564 |
关键词 | Solids Residence Time Distribution (Rtd) Bubbling Fluidized Bed Computational Fluidized Dynamics (Cfd) Semi-empirical Approach Dual Fluidized Bed |
ISSN号 | 0032-5910 |
DOI | 10.1016/j.powtec.2017.07.085 |
文献子类 | Article |
英文摘要 | 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. |
WOS关键词 | Cfd Simulation ; Fine Particles ; Riser ; Gas ; Gasification ; Reactor |
WOS研究方向 | Engineering |
语种 | 英语 |
WOS记录号 | WOS:000411544800060 |
资助机构 | National Natural Science Foundation of China(21576265) |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/23250] |
专题 | 过程工程研究所_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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