| Experimental study on weakly caking coal combustion preheated by circulating fluidized bed | |
| Zhu SJ(朱书骏)1,2; Zhu Jianguo1,3; Lyu Qinggang1,3; Man Chengbo1; Ouyang Ziqu1,3; Liu Jingzhang1; Ding Hongliang1,3; Liu Yuhua1,3; Zhang Xiaoyu1,4 | |
| Corresponding Author | Zhu, Shujun([email protected]) ; Zhu, Jianguo([email protected]) |
| Source Publication | FUEL
 |
| 2021-07-01 | |
| Volume | 295Pages:12 |
| ISSN | 0016-2361 |
| Abstract | 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. |
| Keyword | Weakly caking coal Caking trend NO emissions Preheating Circulating fluidized bed |
| DOI | 10.1016/j.fuel.2021.120592 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000638041100008 |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| Funding Project | 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 |
| Funding Organization | 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 |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Zhu, Shujun ; Zhu, Jianguo |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/86456 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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.Rp_Au:Zhu, Shujun, Zhu, Jianguo |
| 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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| Jp2021F174.pdf（7311KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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