| 水蒸气对oxy-coal燃烧中NO生成的影响 |
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| 引用本文： | 胡晓炜,吴望晨,姚洪. 水蒸气对oxy-coal燃烧中NO生成的影响[J]. 化工学报, 2014, 65(11): 4564-4570. DOI: 10.3969/j.issn.0438-1157.2014.11.050 |
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| 作者姓名： | 胡晓炜 吴望晨 姚洪 |
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| 作者单位： | 华中科技大学煤燃烧国家重点实验室, 湖北 武汉 430074 |
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| 摘 要： | 为了研究H2O对燃料N向NO转化各个阶段的影响,采用可沿程取样的沉降炉反应器,研究了一种烟煤在1273 K温度下,O2/N2、O2/CO2以及O2/CO2/H2O气氛下燃烧的燃尽与NO生成的情况.并通过在停留时间为0.2、0.3、0.5、1.1 s与O2浓度为5%、21%及30%情况下的实验来研究H2O对NO生成的影响.实验结果表明,相对于O2/CO2气氛,H2O的添加抑制了NO的生成,且该影响主要集中在燃烧初期挥发分N的氧化过程.随着O2浓度的增加,H2O添加对oxy-coal燃烧方式下NO生成影响加大.
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| 关 键 词： | 煤 氧燃料燃烧方式 NO |
| 收稿时间： | 2014-04-14 |
| 修稿时间： | 2014-06-09 |
Influence of steam on NO formation during oxy-coal combustion |
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| HU Xiaowei,WU Wangchen,YAO Hong. Influence of steam on NO formation during oxy-coal combustion[J]. Journal of Chemical Industry and Engineering(China), 2014, 65(11): 4564-4570. DOI: 10.3969/j.issn.0438-1157.2014.11.050 |
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| Authors: | HU Xiaowei WU Wangchen YAO Hong |
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| Affiliation: | State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China |
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| Abstract: | The influence of H2O on NO formation during oxy-coal combustion was investigated in a drop-tube furnace. A bituminous coal was selected and burnt at temperature of 1273 K under O2/N2, O2/CO2 and O2/CO2/H2O atmospheres, respectively. At different O2 contents 5%, 21%, and 30%, the samples were analyzed for increasing residence time from 0.2 s to 1.1 s. The results show that NO formation is suppressed by addition of H2O. The mechanism of NO reduction is due to the change of volatile-N chemistry with H2O addition. The H2O influence on homogeneous NO formation goes up with the increase of O2 concentration. |
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| Keywords: | coal oxy-coal combustion NO |
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