基于空气分级的旋风炉高温喷氨脱硝试验研究  

Experimental study of ammonia-injected denitrification at high-temperature reduction zone based on air classification

作　　者：吴庆龙[1] 陆续[1] 陈德龙 严万军 WU Qinglong;LU Xu;CHEN Delong;YAN Wanjun(Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;China Energy Group Taizhou Power Generation Company Limited,Taizhou 225327,China)

机构地区：[1]西安热工研究院有限公司,陕西西安710054 [2]国家能源集团泰州发电有限公司,江苏泰州225327

出　　处：《热力发电》2021年第5期127-132,共6页Thermal Power Generation

基　　金：国家重点研发计划项目(2018YFB0604105)。

摘　　要：基于空气分级的高温喷氨脱硝技术具有较高的脱硝效率,且无氨逃逸,为实现炉内脱硝提供了新的途径。在某台液态排渣旋风锅炉上开展了空气分级燃烧协同高温喷氨脱硝试验,结果表明:采用分级配风且主燃区过量空气系数为0.8时,NO_(x)生成质量浓度可降低35%;高温喷氨的温度窗口为1200~1600℃,最佳喷氨点在旋风筒出口,氨氮摩尔比为2.0时脱硝效率达到最大值20%;燃用烟煤的旋风锅炉采用空气分级协同高温喷氨后,NO_(x)排放质量浓度可降低到490 mg/m3。Air classification combined with high temperature ammonia-injection denitrification has high denitrification efficiency and no ammonia escape,which provides a new way to realize denitrification in furnace.The experiment of air classification combined with high temperature ammonia-injection denitrification was carried out in a liquid slag-discharging cyclone furnace.The results show that,the NO_(x) generation mass concentration can be reduced by 35%when the excess air coefficient of main combustion zone is 0.8.The temperature window of high temperature ammonia-injection is 1200~1600℃.The optimum ammonia-injection point is at the outlet of cyclone.When the ammonia-nitrogen ratio is 2.0,the denitrification efficiency reaches 20%(the maximum).When the bituminous was burned and air classification combined with high temperature ammonia-injection denitrification was adopted in the cyclone furnace,the mass concentration of NO_(x) emission can be reduced to 490 mg/m3.

关 键 词：旋风锅炉 氮氧化物 空气分级 高温喷氨 协同脱硝 

分 类 号：X505[环境科学与工程—环境工程]