[1]陈传敏,赵长遂,庞克亮,等.O2/CO2气氛下燃煤过程中NOx排放特性实验研究[J].东南大学学报(自然科学版),2005,35(5):738-741.[doi:10.3969/j.issn.1001-0505.2005.05.018]
 Chen Chuanmin,Zhao Changsui,Pang Keliang,et al.Experimental study on NOx emission from coal combustion under O2/CO2 atmosphere[J].Journal of Southeast University (Natural Science Edition),2005,35(5):738-741.[doi:10.3969/j.issn.1001-0505.2005.05.018]
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O2/CO2气氛下燃煤过程中NOx排放特性实验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第5期
页码:
738-741
栏目:
环境科学与工程
出版日期:
2005-09-20

文章信息/Info

Title:
Experimental study on NOx emission from coal combustion under O2/CO2 atmosphere
作者:
陈传敏 赵长遂 庞克亮 梁财
东南大学洁净煤发电及燃烧技术教育部重点实验室, 南京 210096
Author(s):
Chen Chuanmin Zhao Changsui Pang Keliang Liang Cai
Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education,Southeast University, Nanjing 210096, China
关键词:
O2/CO2气氛 煤粉燃烧 NOx排放
Keywords:
O2/CO2 atmosphere pulverized coal combustion NOx emission
分类号:
X51
DOI:
10.3969/j.issn.1001-0505.2005.05.018
摘要:
利用沉降炉在O2/CO2和O2/N2气氛下对煤粉燃烧过程中NOx排放特性进行实验,研究了不同停留时间、燃料/氧化学当量比、温度等因素对燃煤过程中NOx的排放特性的影响,并对2种燃烧方式下NOx的排放特性进行对比.结果表明:在O2/CO2气氛下NOx的生成量远远低于空气气氛下NOx的生成量,其主要原因是在O2/CO2气氛中高CO2质量浓度导致气氛中生成较高含量的CO,从而在未燃烧碳表面发生NO/CO/Char的反应,促进了NO还原为N2; O2/CO2气氛中没有N2,避免了热力型NOx和快速型NOx的生成; 约80%的再循环烟气致使NOx的停留时间大为增加,即延长了NOx的还原反应时间,从而降低了NOx的排放.
Abstract:
The NOx emission characteristics during the pulverized coal combustion process were tested in the one-dimension drop tube under O2/CO2 and O2/N2 atmospheres. The effects of residence time, fuel/oxygen stoichometric ratio and temperature on NOx emission were investigated. The NOx emission characteristics under two atmospheres were compared. The results show that the released NOx is much lower in O2/CO2 atmosphere than in air. The main reason is that high CO2 concentration results in producing abundant CO that promotes the reduction of NO on char surface through the NO/CO/Char reaction. There is no NOx formation via molecular nitrogen because of no any N2 under O2/CO2 atmosphere. About 80% flue gas recycled prolongs NOx residence time and increases deoxidization reaction time, thus reduces NOx emission.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家重点基础研究发展计划(973计划)资助项目(G1999022201-04).
作者简介: 陈传敏(1973—),男,博士生,讲师; 赵长遂(联系人),男,教授,博士生导师,cszhao@seu.edu.cn.
更新日期/Last Update: 2005-09-20