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中国电机工程学报 2007, 27(32) 7-12 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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煤粉在循环流化床高温空气下的燃烧与NOx排放 |
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吕清刚 朱建国 |
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中国科学院工程热物理研究所 中国科学院研究生院 |
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摘要：
高温空气燃烧技术具有低污染物排放的优越性能，有望应用于煤粉的燃烧。搭建了煤粉高温空气燃烧热态试验台，由下行火焰的煤粉燃烧室和提供高温空气的循环流化床组成，煤粉燃烧室内径为220 mm、高3000 mm。用一种烟煤做了燃烧试验，试验结果表明：煤粉燃烧室上下温度均匀；煤粉燃烧室上部的还原区当量系数为0.8时，NOx排放水平在252~294 mg/m3之间，低于国家2003年制定的火电厂污染物排放标准35%~44%；循环流化床提供的高温空气中NOx的浓度对煤粉燃烧室内煤粉中的N向NOx的转化比影响很小；煤粉中的N向NOx的转化比可降低到25%。
关键词：高温空气燃烧；循环流化床；煤粉；氮氧化物
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关键词：
高温空气燃烧
循环流化床
煤粉
氮氧化物
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Pulverized Coal Combustion and NOx Emissions in High Temperature Air From Circulating Fluidized Bed |
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Abstract:
Technology of high temperature air combustion with the advantage of pollutants reduction is expected to be applied to pulverized coal combustion. Experiments on pulverized bituminous coal combustion in high temperature air from a circulating fluidized bed were made in a down-fired coal combustor with the diameter of 220 mm and the height of 3000 mm. Test results showed that temperature profile along the axis of the down-fired coal combustor was uniform and the NOx emissions were about 252~294 mg/m3 (6% O2), 35%~44% lower than the regulation. The NOx concentration of the high temperature air from the circulating fluidized bed had little influence on the conversion ratio of coal-N to NOx in the down-fired coal combustor, and the conversion ratio of coal-N to NOx could be reduced to 25%.
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Keywords:
High temperature air combustion
Circulating fluidized bed
Pulverized coal
Nitrogen dioxide
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收稿日期 2007-02-09 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 吕清刚 |
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作者简介: |
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作者Email: qglu@mail.etp.ac.cn |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．楼波 罗玉和 马晓茜.回转窑内生物质高温空气燃烧NOX生成模型与验证[J]. 中国电机工程学报, 2007,27(29): 68-73 |
| 2．李星 贾力 张田田，杨立新.天然气高温空气燃烧特性数值研究[J]. 中国电机工程学报, 2009,29(32): 37-44 |
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| Copyright by 中国电机工程学报 |
