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Scale-up of bubbling fluidized beds with continuous particle flow based on particle-residence-time distribution
Zhang, Juwei; Xu, Guangwen
2015-04-01
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume19Issue:APRPages:155-163
Abstract

Few studies have investigated scale-up of the residence-time distribution (RID) of particles in bubbling fluidized beds (BFBs) with continuous particle flow. Two approaches were investigated in this study: first, using well-known scaling laws that require changes in particle properties and gas velocity; second, using a simple approach keeping the same particles and gas velocity for different beds. Our theoretical analysis indicates it is possible to obtain similar RTDs in different BFBs with scaling laws if the plug-flow residence time (t(plug)) is changed as m(0.5), where m is the scaling ratio of the bed; however, neither approach can ensure similar RTDs if tplug is kept invariant. To investigate RID variations using two approaches without changing t(plug), we performed experiments in three BFBs. The derivatives dE(theta)/d theta (where E(theta) is the dimensionless RID density function and theta is the dimensionless time) in the early stage of the RTDs always varied with m(-1), which was attributed to the fact that the particle movement in the early stage were mainly subject to dispersion. Using the simple approach, we obtained similar RTDs by separately treating the RTDs in the early and post-stages. This approach guarantees RID similarity and provides basic rules for designing BFBs. (C) 2014 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

KeywordBubbling Fluidized Bed (Bfb) Scale-up Residence Time Distribution (Rtd) Similarity
SubtypeArticle
Subject AreaEngineering ; Materials Science
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2014.04.019
Indexed BySCI
Language英语
WOS KeywordHydrodynamic Similarity ; Verification ; Solids
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
WOS IDWOS:000352750900020
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13790
Collection研究所(批量导入)
Corresponding AuthorZhang, Juwei
AffiliationChinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Juwei,Xu, Guangwen. Scale-up of bubbling fluidized beds with continuous particle flow based on particle-residence-time distribution[J]. PARTICUOLOGY,2015,19(APR):155-163.
APA Zhang, Juwei,&Xu, Guangwen.(2015).Scale-up of bubbling fluidized beds with continuous particle flow based on particle-residence-time distribution.PARTICUOLOGY,19(APR),155-163.
MLA Zhang, Juwei,et al."Scale-up of bubbling fluidized beds with continuous particle flow based on particle-residence-time distribution".PARTICUOLOGY 19.APR(2015):155-163.
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