高温条件下氨还原剂脱硝特性试验研究  

Denitration Characteristics of Ammonia Reductant at High Temperature

作　　者：杨柳[1] 毕德贵[1] 朱志祥 徐达 樊俊杰[1] 张蓓 Yang Liu;Bi Degui;Zhu Zhixiang;Xu Da;Fan Junjie;Zhang Bei(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《燃烧科学与技术》2023年第1期112-118,共7页Journal of Combustion Science and Technology

基　　金：国家重点研发计划资助项目(2018YFB0604202)。

摘　　要：针对NH_(3)在高温区的脱硝特性进行研究,采用配气的方法在一维管式炉上进行实验,研究不同O2浓度、反应温度、氨氮摩尔比等关键因素对高温区氨还原NO_(x)特性的影响.结果表明:氧浓度的升高使NH_(3)/NO的最佳反应温度下降,脱硝效率出现下降趋势;近零氧工况下NH_(3)还原NO_(x)最佳反应温度窗口向高温偏移,反应温度为1 300℃时还原效率最高;随着氨氮摩尔比的增加,NO_(x)的还原效率随之增加,最佳氨氮摩尔比为1.5,无氧工况下脱硝效率可达95%以上,为进一步优化脱硝技术提供参考.In order to study the denitrification characteristics of NH_(3)in high temperature regions,the experiments were conducted at one-dimensional tube furnace by gas distribution method,and the influence of key factors such as O2concentration,reaction temperature and ammonia nitrogen to NO ratio(NSR)on the characteristics of ammonia reduction of NO_(x)in high temperature zones was studied. The results show that with the increase of oxygen concentration,both the optimal reaction temperature of NH_(3)/NO and denitration efficiency decrease. Under the near-zero oxygen condition,the optimum reaction temperature window for NO_(x)reduction by NH_(3)moves upwards,and the reduction efficiency is the highest when the reaction temperature is 1 300 ℃.With the increase of NSR,the reduction efficiency of NO_(x)increases. The optimal ammonia-nitrogen ratio is 1.5,and the maximum denitrification efficiency can reach more than 95% under anaerobic conditions,which provides reference for further optimization of denitrification technology.

关 键 词：高温 氧浓度 氨还原 NO_(x)浓度 还原性气氛 

分 类 号：TK16[动力工程及工程热物理—热能工程]