地下气化煤气作为多组分还原性气体脱硝的实验研究  

Experimental Study on Underground Coal Gasification as Multicomponent Reducing Gas for Denitrification

作　　者：王志强[1] 董勇[1] 马春元[1] 孙绍增[2] 

机构地区：[1]山东大学能源与动力工程学院,山东省济南市250061 [2]哈尔滨工业大学燃烧工程研究所,黑龙江省哈尔滨市150001

出　　处：《中国电机工程学报》2009年第14期47-51,共5页Proceedings of the CSEE

摘　　要：为了揭示再燃过程中地下气化煤气作为多组分还原性气体(H2、CO等)降低还原NO的影响规律,在气体反应器实验台上进行了多组分还原性气体脱硝的实验研究。实验结果表明:反应温度不变时,化学当量比增大,NO脱除率逐渐降低;化学当量比较低时,随着反应温度的升高,NO脱除率逐渐升高;化学当量比较高时,再燃区存在一个最佳反应温度条件;停留时间对多组分气体再燃脱硝的影响规律表明,为提高再燃过程的脱硝效率,在锅炉设计时应尽量增加再燃燃料在再燃区的停留时间;再燃燃料比的增加使再燃区还原性气体浓度增加,这必然提高NO与还原性气体的反应速率,有利于进一步提高NO脱除。实验结果有利于了解多组分还原性气体再燃降低还原NO特性,组织良好的燃烧条件,可为理论研究提供参考依据。In order to reveal the NO reduction behavior of underground coal gasification as multicomponent reducing gas （H2, CO） in the reburning process, systematic experiments were conducted on the gas reactor test-system. The results show that with the increase of stoichiometric ratio, the denitrification efficiency decreased at the isothermal high temperature. The higher temperature of reburning atmosphere, the higher NO reduction can be achieved with the less stoichiometric ratio. But when the stoichiometric ratio is higher, there exists an optimum temperature for multicomponent gas reburning. The effect of residence time on NO reduction shows that in order to get the optimum denitrification efficiency, it should guarantee enough long residence time as much as possible in the design process of the boilers. The increment of reburning fuel ratio is more beneficial to improve the denitrification efficiency. Experimental results not only are beneficial to the understanding of the characteristics of NO reduction and the organization of good combustion conditions, but also provide a basis for theoretical study.

关 键 词：地下气化煤气 多组分还原性气体 脱硝 气体反应器 

分 类 号：TK224[动力工程及工程热物理—动力机械及工程]