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Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed
Alternative TitleAdv. Powder Technol.
Dong, Li1; Ji, Wenfeng1,2; Zhao, Zhigang1,2; Xu, Guangwen1
2014-05-01
Source PublicationADVANCED POWDER TECHNOLOGY
ISSN0921-8831
Volume25Issue:3Pages:1155-1161
AbstractThe existence of stagnant particle layer in the conventional non-mechanical valves limits their utilization in CFB with the feedstock of caking particles. A new N-valve consisted of a fluidized weir chamber with bottom aeration and a moving-bed angled standpipe with side aeration was developed to eliminate the stagnant particle layer and reach high solids circulation rate G(s) in CFBs. The particle flow behavior and its control in the N-valve were studied experimentally. By combining the bottom aeration for weir chamber and the side aeration for angled standpipe the G(s) over 270 kg/(m(2) s) was achieved, and the stagnant particle layer completely disappeared. The G(s) increased with increasing the side aeration gas flow rate Q(sa), and this loosing gas flow was optimally injected from the bend between the downcomer and the angled standpipe. At a constant but enough high Q(sa), the increase in the bottom aeration gas flow rate Q(ba) elevated G(s) linearly. (C) 2014 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.; The existence of stagnant particle layer in the conventional non-mechanical valves limits their utilization in CFB with the feedstock of caking particles. A new N-valve consisted of a fluidized weir chamber with bottom aeration and a moving-bed angled standpipe with side aeration was developed to eliminate the stagnant particle layer and reach high solids circulation rate G(s) in CFBs. The particle flow behavior and its control in the N-valve were studied experimentally. By combining the bottom aeration for weir chamber and the side aeration for angled standpipe the G(s) over 270 kg/(m(2) s) was achieved, and the stagnant particle layer completely disappeared. The G(s) increased with increasing the side aeration gas flow rate Q(sa), and this loosing gas flow was optimally injected from the bend between the downcomer and the angled standpipe. At a constant but enough high Q(sa), the increase in the bottom aeration gas flow rate Q(ba) elevated G(s) linearly. (C) 2014 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
KeywordCirculating Fluidized Bed Non-mechanical Valve Solid Circulation Rate Stagnant Particle Layer N-valve With Side Aeration
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.apt.2014.02.021
URL查看原文
Indexed BySCI
Language英语
WOS KeywordLOOP-SEAL ; OPERATION ; BEHAVIOR
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000337216000048
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10896
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100081, Peoples R China
Recommended Citation
GB/T 7714
Dong, Li,Ji, Wenfeng,Zhao, Zhigang,et al. Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed[J]. ADVANCED POWDER TECHNOLOGY,2014,25(3):1155-1161.
APA Dong, Li,Ji, Wenfeng,Zhao, Zhigang,&Xu, Guangwen.(2014).Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed.ADVANCED POWDER TECHNOLOGY,25(3),1155-1161.
MLA Dong, Li,et al."Elimination of stagnant particles from a N-valve with side aeration in circulating fluidized bed".ADVANCED POWDER TECHNOLOGY 25.3(2014):1155-1161.
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