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Comparative study on the hydrodynamics and mixing characteristics of a new-type particle mixer
Meng, Zhenliang1,2; Liu, Mengxi1; Xie, Junming1; Wang, Wei2,3; Lu, Chunxi1
2018-06-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume332Pages:90-105
AbstractThe characteristics of particle flow and mixing have a considerable influence on mass and heat transfer, as well as product quality. In order to further enhance the particle mixing in an internally circulating fluidized bed (ICFB), especially along the radial direction, four slots were opened on the draft tube of an ICFB mixer. Hydrodynamic characteristics were investigated by using a multi-scale computational fluid dynamics (CFD) model incorporating the EMMS drag. The prediction in terms of cross-sectionally averaged solid holdup and particle velocity were compared to experimental data for validation. Compared with a traditional ICFB mixer, the new mixer with four slots opening on the draft tube presents strong radial particle flow through the slots, and thereby provides better mixing performance. It is found that nearly 25.4% to 29.7% of gas in the draft tube bypasses and flows through the slots into the annulus. With increase in the superficial gas velocity in the draft tube from 0.3 m/s to 0.45 m/s, the total particle circulation mass flux in the new ICFB mixer increases from 4.87 kg/s to 10.86 kg/s. The mixing index reaches about 0.98 in the new ICFB mixer. (C) 2018 Elsevier B.V. All rights reserved.
KeywordInternally circulating fluidized bed Slots EMMS Hydrodynamics Particle mixing
DOI10.1016/j.powtec.2018.03.057
Language英语
WOS KeywordCIRCULATING FLUIDIZED-BED ; DISCRETE ELEMENT METHOD ; MULTISCALE CFD APPROACH ; PERFORATED DRAFT TUBE ; GAS-SOLID FLOW ; BUBBLE-COLUMN ; SIMULATION ; MODEL ; REACTOR ; DISPERSION
Funding ProjectNational Natural Science Foundation of China[91534111] ; National Natural Science Foundation of China[91334204] ; National Natural Science Foundation of China[21625605] ; National Key Basic Research Project (973) of the People's Republic of China[2012CB215000]
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; National Key Basic Research Project (973) of the People's Republic of China
WOS IDWOS:000432640500011
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24830
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Mengxi; Wang, Wei
Affiliation1.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Meng, Zhenliang,Liu, Mengxi,Xie, Junming,et al. Comparative study on the hydrodynamics and mixing characteristics of a new-type particle mixer[J]. POWDER TECHNOLOGY,2018,332:90-105.
APA Meng, Zhenliang,Liu, Mengxi,Xie, Junming,Wang, Wei,&Lu, Chunxi.(2018).Comparative study on the hydrodynamics and mixing characteristics of a new-type particle mixer.POWDER TECHNOLOGY,332,90-105.
MLA Meng, Zhenliang,et al."Comparative study on the hydrodynamics and mixing characteristics of a new-type particle mixer".POWDER TECHNOLOGY 332(2018):90-105.
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