不同煤燃烧方式降低NO<sub><em>x</em></sub>排放比较及解耦燃烧应用

尚校; 高士秋; 汪印; 董利; 许光文; 郭景海

不同煤燃烧方式降低NO_x排放比较及解耦燃烧应用

尚校^1,2,
高士秋^1,,
汪印¹,
董利¹,
许光文¹,
郭景海³

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.
东北师范大学城市与环境科学学院, 吉林长春 130024;
3.
吉林化工学院环境与生物工程学院, 吉林吉林 132022

基金项目: 国家自然科学基金(21076217); 国家重点基础研究发展规划(973计划, 2011CB201304); 国家科技支撑计划(2010BAC66B01); 国家高技术研究发展计划(863计划, 2007AA05Z304); 中国科学院科技支新项目。

详细信息

通讯作者:
高士秋, 许光文, Tel: 010-82544885, E-mail: sqgao@home.ipe.ac.cn,gwxu@home.ipe.ac.cn。

中图分类号: TQ534.9
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出版历程
- 收稿日期: 2011-08-28
- 修回日期: 2011-11-21
- 刊出日期: 2012-06-30

Comparison of NO_x reduction among different coal combustion methods and the application of decoupling combustion

1.
State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2.
School of Urban and Environmental Sciences, Northeast Normal University, Changchun 130024, China;
3.
School of Environmental and Biological Engineering, Jilin Institute of Chemical Technology, Jilin 132022, China

摘要

摘要: 采用两段反应器研究了三种煤在不同燃烧方式下抑制NO_x生成的效果。结果表明,煤的热解气和部分气化生成气再燃均能较好的抑制NO_x生成,抑制效果优于空气分级燃烧,解耦燃烧方式抑制NO_x生成的效果最显著,相对于传统燃烧其NO_x排放降低了32%以上。煤种对各种燃烧方式降低NO_x的程度有明显影响,煤中单位氮含量的燃料比(固定碳/挥发分)越小,煤的热解气和部分气化生成气再燃以及解耦燃烧方式下NO_x的排放量越低。在煤部分气化生成气再燃烧方式中,部分氧化气化段通氧量不同,降低NO_x排放的效果也不同,在氧气体积分数为8%~10%时的NO_x生成量最低。基于解耦燃烧技术原理,研制了1.4 MW解耦燃烧工业锅炉,在燃烧同一煤种时,解耦燃烧锅炉和传统立式锅炉相比,烟气中NO_x排放量降低了32.9%。
- 低氮燃烧 /
- 气体再燃 /
- 解耦燃烧 /
- 煤
Abstract: The reduction of NO_x emission via different coal combustion methods was studied in a two-stage reactor using 3 different coals. The NO_x formation is effectively suppressed by reburning the gas from pyrolysis and partial gasification of coal, making the NO_x emission obviously lower than that of the air-staged combustion. It is found that the decoupling combustion leads to the higher NO_x reduction rate, which is over 32% in comparison with the normal combustion. The NO_x reduction rates vary with the coal properties. The smaller the fuel ratio (fixed carbon to volatile matter)at per nitrogen content in coal, the lower NO_x emission is for reburning the combustible gas from pyrolysis and gasification and also for the decoupling combustion. The NO_x emission due to reburning the partial gasification gas varies with the oxygen amount applied in the gasification, and the lowest NO_x emission is realized in the oxygen concentration from 8% to 10%. A 1.4 MW industrial boiler was designed according to the principle of the decoupling combustion technology. The running data for the same coal show that the decoupling combustion reduces 32.9% NO_x emission in comparison with the traditional combustion.
- low-NO_x combustion /
- gas reburning /
- decoupling combustion /
- coal

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参考文献(27)

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不同煤燃烧方式降低NO_x排放比较及解耦燃烧应用

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不同煤燃烧方式降低NOx排放比较及解耦燃烧应用

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Comparison of NOx reduction among different coal combustion methods and the application of decoupling combustion

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出版历程

目录

2023年《燃料化学学报（中英文）》评优结果公布！

不同煤燃烧方式降低NO_x排放比较及解耦燃烧应用

通讯作者:
高士秋, 许光文, Tel: 010-82544885, E-mail: sqgao@home.ipe.ac.cn,gwxu@home.ipe.ac.cn。

Comparison of NO_x reduction among different coal combustion methods and the application of decoupling combustion