高温还原区喷氨脱硝试验研究  

Experimental Research on Denitrification Process by Reagent Injection in the High-temperature Reduction Zone

作　　者：陆续[1] 吴庆龙[1] 张向宇[1] 白文刚[1] 张波[1] 高宁[1] 徐宏杰[1] LU Xu;WU Qinglong;ZHANG Xiangyu;BAI Wengang;ZHANG Bo;GAO Ning;XU Hongjie(Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710032,China)

机构地区：[1]西安热工研究院有限公司,西安710032

出　　处：《动力工程学报》2020年第6期481-485,501,共6页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2018YFB0604103);中国华能集团公司科学技术资助项目(2019年“高精尖”专家科研专项)。

摘　　要：建立了高温喷氨脱硝机理模型,研究了反应温度、氧体积分数、氨氮物质的量比和停留时间等参数对脱硝效率的影响,并在一维煤粉炉上开展了试验。结果表明:高温喷氨脱硝反应的温度窗口为1200~1600℃,氧体积分数应小于1%,氨氮物质的量比的范围为1.0~1.3,停留时间应大于0.4 s,CO体积分数对脱硝效率没有影响;燃用烟煤时,高温喷氨脱硝效率可达48%。A mechanism model of denitrification process by high-temperature reagent injection was established,so as to study the effects of following factors on the denitrification efficiency,such as the reaction temperature,oxygen concentration,NSR and residence time,etc.,while an experiment was carried out in a one-dimensional pulverized coal furnace.Results show that the temperature window of high-temperature reagent injection is 1200-1600℃,with an oxygen content being less than 1%,an NSR range of 1.0-1.3,and a residence time being more than 0.4 s.The CO concentration has nearly no effect on the denitrification efficiency.When the bituminous coal is taken as the fuel,the denitrification efficiency by high-temperature reagent injection could reach 48%.

关 键 词：脱硝效率 反应温度 空气分级 一维煤粉炉 停留时间 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]