摘要
研究了一种烟煤和一种无烟煤在氧气体积浓度21%～100%的O2/CO2气氛下的水平管式炉中1073K时的NO生成特性。结果表明O2/CO2气氛下的NO的生成量小于空气条件下的一半。在焦炭表面生成的CO是减少NO生成的主要原因。O2/CO2下燃料N向NO的转化率随氧气的浓度增加上升,并在较高氧气浓度时持平。NO的析出过程受煤种的影响。烟煤在挥发分析出阶段有一定的NO伴随大量CO析出而生成,而无烟煤则没有。无烟煤的NO转化率比烟煤高。
NO emission of bituminous coal and anthracite during combustion in O2/CO2 atmosphere were studied at 1073 K and 21%-100% oxygen in a horizontal tube oven. The results show that NO formed in O2/CO2 atmosphere is less than half of that in air. It is believed that CO formed through heterogeneous reaction is the main factor for the NO reduction. NO increases with oxygen concentration until levels out. The emission process of NO is affected by fuel types. A lot of NO will be formed accompanied with the massive CO emission during devolatilization of the bituminous, while the anthracite not. The fuel nitrogen conversion ratio to NO of the anthracite is larger than that of the bituminous.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第35期53-58,6,共6页
Proceedings of the CSEE
