Experimental study on NOx emissions of pulverized coal combustion preheated by a 2 MW novel self-sustained preheating combustor
文献类型：期刊论文
| 作者 | Ouyang, Ziqu2,3; Song, Wenhao2,3; Liu, Jingzhang3; Zhu, Jianguo2,3; Man, Chengbo3; Zhu, Shujun1,3; Ding, Hongliang2,3 |
| 刊名 | FUEL
 |
| 出版日期 | 2021-06-15 |
| 卷号 | 294页码:11 |
| ISSN号 | 0016-2361 |
| 关键词 | Self-sustained preheating combustion Air staging NOx emission Pulverized coal |
| DOI | 10.1016/j.fuel.2021.120538 |
| 通讯作者 | Liu, Jingzhang(liujingzhang@iet.cn) |
| 英文摘要 | In the study, a potentially feasible low-NOx combustion technology, based on self-sustained preheating combustion of pulverized coal, is proposed. A 2 MW novel self-sustained preheating combustion test rig was employed, and bituminous coal was used in the experiment. A novel internal fluidized bed combustor (IFBC) was used as the preheating chamber for pulverized coal, followed by air staging in the combustion chamber. Preheating characteristics of the IFBC and the temperature distribution in the primary combustion zone were discussed. Next, the effects of the air staging ratio of the preheated fuel burner and the positions of tertiary air on the combustion characteristics and NOx emissions of bituminous coal were investigated. The results demonstrated that pulverized coal led to a clean and efficient operation, producing a minimum NOx emission of 72 mg/Nm(3) (@ 6% O-2). The fuel could be preheated to above 900 degrees C stably, and the obtained conversion rate of fuelbound N (fuel-N) was up to 80.2% in the IFBC. Moreover, the temperature profile in the primary combustion zone exhibited a symmetrical distribution along the central axis of the preheated fuel burner. The hightemperature primary combustion zone moved upward with increasing air staging ratio of the preheated fuel burner, and a region with low oxygen and strong reducibility was formed, inhibiting NOx generation. To maximally reduce NOx emission, a large retention time in the reducing zone and uniform mixing of reactants were crucial. The multi-layer arrangement and delayed supply of tertiary air were found to be conducive to significantly reducing NOx emissions. |
| WOS关键词 | AIR-STAGING CONDITIONS ; STAGED COMBUSTION ; BURNOUT CHARACTERISTICS ; FLY-ASH ; REDUCTION ; GASIFICATION ; TEMPERATURE ; RELEASE ; BIOMASS ; SULFUR |
| 资助项目 | National Key R&D Program of China[2017YFB0602001] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2019148] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000640910000005 |
| 资助机构 | National Key R&D Program of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/86599]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 通讯作者 | Liu, Jingzhang |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ouyang, Ziqu,Song, Wenhao,Liu, Jingzhang,et al. Experimental study on NOx emissions of pulverized coal combustion preheated by a 2 MW novel self-sustained preheating combustor[J]. FUEL,2021,294:11. |
| APA | Ouyang, Ziqu.,Song, Wenhao.,Liu, Jingzhang.,Zhu, Jianguo.,Man, Chengbo.,...&Ding, Hongliang.(2021).Experimental study on NOx emissions of pulverized coal combustion preheated by a 2 MW novel self-sustained preheating combustor.FUEL,294,11. |
| MLA | Ouyang, Ziqu,et al."Experimental study on NOx emissions of pulverized coal combustion preheated by a 2 MW novel self-sustained preheating combustor".FUEL 294(2021):11. |
入库方式： OAI收割
来源：力学研究所
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