富氧富水蒸气条件下燃烧高氮燃料的NOx排放特性
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摘要: 在富氧富水蒸气条件下,研究了富含氮的燃料白酒糟在流化床中燃烧时 NOx的排放特性。结果表明,在 过量空气系数 1.2 条件下,水蒸气和 O2对 NOx的生成相互影响。当 O2浓度低于约 35% 时,向燃烧气中加入水蒸气 能抑制 NOx生成,使烟气中 NOx的排放浓度和燃料 N 转化为 NOx的转化率降低;而当氧气浓度高于约 35% 时,加 入水蒸气促进了 NOx生成,表明提高氧气浓度使得氧化作用起到主导地位。NOx生成量随温度的升高先增加后减 少,在较高氧气浓度下,NOx 生成量随温度升高而降低的转折点发生在较低的温度;燃烧气氛中添加水蒸气延迟 了转折点的发生,使转折点发生在较高温度。
研究论文
DOI:10.11949/j.issn.0438⁃1157.20181042
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富氧富水蒸气条件下燃烧高氮燃料的 NOx排放特性
朱传强 1,2,3,刘殊远 1,余剑 1,高士秋 1,许光文 1
(1 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京 100190;2中国科学院大学化学化工学院,北京 100190; 3光大环保技术研究院 (南京) 有限公司焚烧技术研究所,江苏 南京 211100)
ZHU Chuanqiang1,2,3, LIU Shuyuan1, YU Jian1, GAO Shiqiu1, XU Guangwen1
(1 State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; 2School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100190, China;3 Everbright Environmental Technology Research Institute Nanjing Co., Ltd., Incineration Technology Research Institute,
关键词: 富氧;富蒸气;低 NOx燃烧; TQ 534
文献标志码: A
文章编号: 0438⁃1157 (2019) 03-1048-08
NOx emission characteristics of high-N fuel combustion in atmospheres rich in O2 and steam
Nanjing 211100, Jiangsu, China)
Abstract: The NOx emission characteristics of the nitrogen-rich fuel distiller's grains in a fluidized bed were studied under oxygen-rich and steam-rich conditions. The effect of steam on NOx emission is competitive with the influence from varying oxygen concentration in the combustion gas at the excessive air ratio of 1.2. When the oxygen concentration was below a value of about 35%, the steam addition decreased the NOx formation to lower the NOx concentration in the flue gas and also the fuel-N conversion into NOx. When oxygen concentration in the combustion gas was above the preceding critical value of about 35%, the addition of steam into the burning atmosphere resulted in higher NOx emission than the case without steam addition, showing the dominance of the enhanced oxidation with raising the O2 concentration. The NOx emission would increase first and finally decrease with raising temperature, and the higher O2 concentration in the combustion gas lowered the occurrence temperature for such a NOx decrease with raising temperature. The presence of steam in the combustion atmosphere delayed the occurrence of such a
收稿日期:2018-09-17 修回日期:2018-12-19 通信作者:高士秋(1964—),男,博士,研究员,sqgao@ 第一作者:朱传强(1987—),男,博士研究生,zhucq@ 基金项目:政府间国际创新合作项目(2016YFE0128300) 引用本文:朱传强, 刘殊远, 余剑, 高士秋, 许光文 . 富氧富水蒸气条件下燃烧高氮燃料的 NOx排放特性[J]. 化工学报, 2019, 70(3): 1048-1055 Citation: ZHU Chuanqiang, LIU Shuyuan, YU Jian, GAO Shiqiu, XU Guangwen. NOx emission characteristics of high-N fuel combustion in atmospheres rich in O2 and steam[J]. CIESC Journal, 2019, 70(3): 1048-1055
CIESC Journal, 2019, 70(3): 1048-1055
化工学报 2019 年 第 70 卷 第 3 期 |
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