摘要
在500 t·d^-1的生活垃圾焚烧炉上,进行了无软水稀释的氨水喷射还原NO_x的SNCR工艺研究。结果表明,在NO_x排放初始值为240 mg·m^-3,最优化温度区间830~870℃的条件下,NOx排放浓度可以控制在120 mg·m^-3以下,脱硝效率达到50%;随氨氮比的增加,脱硝效率相应增加,氨逃逸也增大,最佳氨氮比为1.6.喷枪雾化压力存在最佳值0.3 MPa,喷射层软水的加入对脱硝效率没有显著影响。随烟气中水蒸气含量的增加,SNCR的脱硝效率呈现降低趋势。本研究结果可为垃圾焚烧行业SNCR工程调试和实际运行提供技术参考。
The study of SNCR technology using ammonia injection to reduce NOx without dilute water was carried out in the 500 t·d^-1 domestic waste incinerator.The results showed that when initial NOx emission concentration was 240 mg-m^-3 and optimized temperature ranged from 830 to870℃,NOx emission concentration could be less than 120 mg·m^-3,denitration efficiency could be50%.With raising the ratio of ammonia to nitrogen,denitration efficiency increased accordingly,and the optimum ratio was 1.6.The optimum atomization pressure of the spray lance was 0.3 MPa.Dilute water added in spray lance could not affect the denitration efficiency significantly,and the denitration efficiency of SNCR decreased with increasing water vapor content in the flue gas.The research results can provide technical reference for SNCR engineering commissioning and actual operation in the waste incineration industry.
作者
朱传强
胡利华
沈宏伟
杨姝
邵哲如
ZHU Chuan-Qiang;HU Li-Hua;SHEN Hong-Wei;YANG Shu;SHAG Zhe-Ru(Everbright Environmental Technology Research Institute(Nanjing)Co.,Ltd.,Incineration Technology Research Institute,Nanjing 211100,China;State Key Laboratory of Multi-phase Complex Systems,Institute of Process Engineering,CAS,Beijing 100190,China;School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第8期2089-2095,共7页
Journal of Engineering Thermophysics
基金
国家重点研发计划资助(No.2018YFC1901300)。
关键词
垃圾焚烧
SNCR
软水
NOx
脱硝效率
domestic waste incinerator
SNCR
dilute water
NOx
denitration efficiency
