High Solid-Flux Concurrent Conveying Flow Realized by Coupling a Moving Bed to the Bottom Section of a Riser

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	High Solid-Flux Concurrent Conveying Flow Realized by Coupling a Moving Bed to the Bottom Section of a Riser
	Liu, Xinhua 1; Cui, Xin 1,2; Sun, Guang 1,3; Sun, Guogang 3; Suda, Toshiyuki 4; Xu, Guangwen 1
刊名	INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
	2008-12-03
卷号	47 期号:23 页码:9703-9708
关键词	circulating fluidized-bed density hydrodynamics gasification gas
ISSN号	0888-5885
其他题名	Ind. Eng. Chem. Res.
中文摘要	Gasification of coal and biomass is in pursuit of the technologies based on dual bed combination and a high-density transport bed. Dual fluidized bed gasification (DFBG) relies on rapidly circulated particles between its combustor and gasifier to provide the endothermic heat required by the gasification. High-density transport bed gasification (HTBG) has to work with a high solid flux and a high particle density inside its gasifier so as to increase the heat reserve in the bed and to suppress tar evolution there. The idea of coupling a moving bed to the bottom section of the riser of a circulating fluidized bed (CFB) was proposed to realize the desired high solid-flux conveying flow inside the riser. Experiments in a 12-m high and 90 mm i.d. riser of the newly configured CFB demonstrated that at superficial gas velocities of about 9.6 m/s, a solid circulation rate as high as 370 kg/(m(2) s) and all average solid holdup of about 0.12 in the bottom section of the riser were readily achieved simultaneously for the silica sand particles of 378 mu m in Sauter mean diameter. Parametric investigation further clarified that the solid circulation rate and the local solid holdup at the riser bottom of the newly configured CFB were highly dependent on the moving bed aeration and the primary gas velocity of the riser, whereas changing the solid inventory in the system did not greatly affect those two variables. Adoption of a secondary air injection into the riser enabled adjustment of the solid circulation rate within a certain range, showing essentially a complementary rneans for controlling the gas-solid flow inside the riser of the newly configured CFB.
英文摘要	Gasification of coal and biomass is in pursuit of the technologies based on dual bed combination and a high-density transport bed. Dual fluidized bed gasification (DFBG) relies on rapidly circulated particles between its combustor and gasifier to provide the endothermic heat required by the gasification. High-density transport bed gasification (HTBG) has to work with a high solid flux and a high particle density inside its gasifier so as to increase the heat reserve in the bed and to suppress tar evolution there. The idea of coupling a moving bed to the bottom section of the riser of a circulating fluidized bed (CFB) was proposed to realize the desired high solid-flux conveying flow inside the riser. Experiments in a 12-m high and 90 mm i.d. riser of the newly configured CFB demonstrated that at superficial gas velocities of about 9.6 m/s, a solid circulation rate as high as 370 kg/(m(2) s) and all average solid holdup of about 0.12 in the bottom section of the riser were readily achieved simultaneously for the silica sand particles of 378 mu m in Sauter mean diameter. Parametric investigation further clarified that the solid circulation rate and the local solid holdup at the riser bottom of the newly configured CFB were highly dependent on the moving bed aeration and the primary gas velocity of the riser, whereas changing the solid inventory in the system did not greatly affect those two variables. Adoption of a secondary air injection into the riser enabled adjustment of the solid circulation rate within a certain range, showing essentially a complementary rneans for controlling the gas-solid flow inside the riser of the newly configured CFB.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	CIRCULATING FLUIDIZED-BED ; DENSITY ; HYDRODYNAMICS ; GASIFICATION ; GAS
收录类别	SCI
原文出处	://WOS:000261279700086
语种	英语
WOS记录号	WOS:000261279700086
公开日期	2013-10-08
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/2808]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.CAS, Inst Proc Engn, State Key Lab Multi Phase Complex Syst, Beijing 100190, Peoples R China 2.Shenyang Inst Chem Technol, Sch Chem Engn, Shenyang 110142, Peoples R China 3.China Univ Petr, Fac Chem Engn, Beijing 102249, Peoples R China 4.IHI Corp Ltd, Res Lab, Isogo Ku, Yokohama, Kanagawa 2358501, Japan
推荐引用方式 GB/T 7714	Liu, Xinhua,Cui, Xin,Sun, Guang,et al. High Solid-Flux Concurrent Conveying Flow Realized by Coupling a Moving Bed to the Bottom Section of a Riser[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2008,47(23):9703-9708.
APA	Liu, Xinhua,Cui, Xin,Sun, Guang,Sun, Guogang,Suda, Toshiyuki,&Xu, Guangwen.(2008).High Solid-Flux Concurrent Conveying Flow Realized by Coupling a Moving Bed to the Bottom Section of a Riser.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,47(23),9703-9708.
MLA	Liu, Xinhua,et al."High Solid-Flux Concurrent Conveying Flow Realized by Coupling a Moving Bed to the Bottom Section of a Riser".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 47.23(2008):9703-9708.