Experimental study on weakly caking coal combustion preheated by circulating fluidized bed

doi:10.1016/j.fuel.2021.120592

	Experimental study on weakly caking coal combustion preheated by circulating fluidized bed
	Zhu SJ(朱书骏)1,2; Zhu Jianguo 1,3; Lyu Qinggang 1,3; Man Chengbo 1; Ouyang Ziqu 1,3; Liu Jingzhang 1; Ding Hongliang 1,3; Liu Yuhua 1,3; Zhang Xiaoyu1,4
通讯作者	Zhu, Shujun(zhushujun@iet.cn) ; Zhu, Jianguo(zhujianguo@iet.cn)
发表期刊	FUEL
	2021-07-01
卷号	295 页码:12
ISSN	0016-2361
摘要	In this study, we sought to achieve a stable high-efficiency and low-NOx combustion of weakly caking coal by preheating fuel in a pre-circulating fluidized bed (PCFB). When the operating temperature of the PCFB increased from 954 ?C to 1048 ?C and the fluidizing gas velocity increased from 2.02 m/s to 3.27 m/s, the stable operating time of the caking coal increased significantly from 290 min to 550 min. Moreover, the caking trend of the preheated char completely disappeared (RI = 0, GR.I = 0). The preheated char particles were obviously bonded together at 954 ?C, while the char particles were still clearly separated at 1048 ?C. These results indicate that the high preheating temperature and the high fluidizing gas velocity are beneficial to alleviate or even resolve the preheating instability of weakly caking coal. Based on the stable preheating operation, the temperature field and reaction field in the main combustion zone were relatively uniform. Gas-phase nitrogen-containing compounds in the post-combustion chamber existed mainly in the form of NO, and the NO concentration in the reducing zone was zero. With the gradual injection of the burnout air, the NO concentration first increased and then decreased to a stable level. By arranging the burnout air position separating the reducing zone and the oxidizing zone to broaden the reducing zone, NO emissions were further reduced without affecting the combustion effect. And the preheating combustion technology is verified to more flexibly arrange the number of air distribution layers in multilevel air distribution settings.
关键词	Weakly caking coal Caking trend NO emissions Preheating Circulating fluidized bed
DOI	10.1016/j.fuel.2021.120592
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000638041100008
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Chemical
资助项目	National Natural Science Foundation of China[52006233] ; China Postdoctoral Science Foundation[2020 M670479] ; Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences[XDA21040100] ; Postdoctoral Funding Project for the Construction of Highly Sophisticated Engineering Disciplines of University of Chinese Academy of Sciences
项目资助者	National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences ; Postdoctoral Funding Project for the Construction of Highly Sophisticated Engineering Disciplines of University of Chinese Academy of Sciences
论文分区	一类
力学所作者排名	1
RpAuthor	Zhu, Shujun ; Zhu, Jianguo
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/86456
专题	高温气体动力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Zhu SJ,Zhu Jianguo,Lyu Qinggang,et al. Experimental study on weakly caking coal combustion preheated by circulating fluidized bed[J]. FUEL,2021,295:12.
APA	朱书骏.,Zhu Jianguo.,Lyu Qinggang.,Man Chengbo.,Ouyang Ziqu.,...&Zhang Xiaoyu.(2021).Experimental study on weakly caking coal combustion preheated by circulating fluidized bed.FUEL,295,12.
MLA	朱书骏,et al."Experimental study on weakly caking coal combustion preheated by circulating fluidized bed".FUEL 295(2021):12.

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