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Simulation of the heterogeneous semi-dry flue gas desulfurization in a pilot CFB riser using the two-fluid model
Wang Xue1; Li Yujia2; Zhu Tingyu1; Jing Pengfei1; Wang Junsheng1
2015-03-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume264Issue:MARPages:479-486
Abstract

Simi-dry flue gas desulfurization (FGD) in a pilot circulating fluidized bed (CFB) reactor was studied by the CFD method. Heterogeneous hydrodynamics and desulfurization reaction were simulated in a three-dimensional domain of the CFB riser. Euler-Euler approach was adopted and the O-S drag model was utilized for the unsteady gas-solid two-phase flow, which achieved the typical core-annulus structure of both the particle concentration and the particle velocity. The collision coefficient (e) was selected by comparing with the experimental data of the solid volume fraction. The desulfurization was described by the continuous conversion model and the liquid film thickness equation for interphase mass transport was modified to avoid "divided by zero". Detailed analysis figured out that the water mass fraction in the particle phase played a significant role in the desulfurization. The sorbent dissolving might be a controlling step when the water mass fraction was very small, and should be taken into consideration rather than neglected. Operating parameters were discussed for their impact on the desulfurization efficiency. Computational results showed that the jet water flow rate was the most significant parameter as the circulating solid mass flow rate followed closely behind, suggesting that uniform water jetting will be the most improving method. (C) 2014 Elsevier B.V. All rights reserved.

KeywordSemi-dry Fgd Circulating Fluidized Bed 3d Transient Simulation Heterogeneous Drag Model Modified Liquid Film Thickness Equation Controlling Step
SubtypeArticle
Subject AreaEngineering
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2014.11.038
Indexed BySCI
Language英语
WOS KeywordCirculating Fluidized-bed ; Flow ; Particles ; So2
Funding ProjectChinese Academy of Sciences [XDB05050100] ; National High-tech R&D Program (863 Program) [2011AA060802, 2012AA062501]
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000350191800053
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13808
Collection研究所(批量导入)
Corresponding AuthorZhu Tingyu
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Res Ctr Proc Pollut Control, Natl Engn Lab Hydrometallurg Cleaner Prod Technol, Beijing 100190, Peoples R China
2.China Univ Petr, Beijing 102249, Peoples R China
Recommended Citation
GB/T 7714
Wang Xue,Li Yujia,Zhu Tingyu,et al. Simulation of the heterogeneous semi-dry flue gas desulfurization in a pilot CFB riser using the two-fluid model[J]. CHEMICAL ENGINEERING JOURNAL,2015,264(MAR):479-486.
APA Wang Xue,Li Yujia,Zhu Tingyu,Jing Pengfei,&Wang Junsheng.(2015).Simulation of the heterogeneous semi-dry flue gas desulfurization in a pilot CFB riser using the two-fluid model.CHEMICAL ENGINEERING JOURNAL,264(MAR),479-486.
MLA Wang Xue,et al."Simulation of the heterogeneous semi-dry flue gas desulfurization in a pilot CFB riser using the two-fluid model".CHEMICAL ENGINEERING JOURNAL 264.MAR(2015):479-486.
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