摘要
在300 t·d^(-1)的生活垃圾焚烧炉上,进行了干法脱硝剂喷射还原NO_(x)的高分子非催化还原脱硝(PNCR)工艺研究。结果表明,与SNCR(选择性非催化还原)相比,PNCR工艺具有更宽的温度窗口范围,在NO_(x)排放初始值为320 mg·m^(-3),最优化温度区间850~900℃的条件下,NO_(x)排放浓度可以控制在60 mg·m^(-3)以下,脱硝效率达到80%;随着脱硝剂耗量的增加,脱硝效率相应增加,脱硝剂的最佳质量流量为30 kg·h^(-1),随着氧气浓度增高,脱硝效率下降,合适的氧气浓度应控制在8%以下。控制NO_(x)<100 mg·m^(-3),SNCR+PNCR工艺比PNCR工艺运行成本更低,更适合垃圾发电厂。本研究结果可为垃圾焚烧行业PNCR工程调试和实际运行提供技术参考。
The PNCR(polymer non-catalytic reduction)technology using denitration agent to reduce NO_(x) was investigated in a 300 t·d^(-1) domestic waste incinerator.The results showed that PNCR technology has a larger temperature range in comparison with SNCR(selective non-catalytic reduction).When initial NOx emission concentration was 320 mg·m^(-3) and optimized temperature ranged from 850 to 900℃,NOx emission concentration could be less than 60 mg·m^(-3) and denitration efficiency reached 80%.With raising the mass flow rate of denitration agent,denitration efficiency increased accordingly,and the optimum mass flow rate was 30 kg·h^(-1).The higher oxygen concentration resulted in the lower denitration efficiency.The suitable oxygen concentration was below 8%.To achieve the goal of NO_(x) emission concentration being less than 100 mg·m^(-3),the SNCR+PNCR technology is less expensive than the PNCR technology and is more suitable for waste-to-energy plants The research results can provide technical reference for PNCR engineering commissioning and actual operation in the waste incineration industry.
作者
朱传强
茹晋波
扈明东
杨仕桥
邵哲如
ZHU Chuan-Qiang;RU Jin-Bo;HU Ming-Dong;YANG Shi-Qiao;SHAO 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;Everbright environmental energy(Rizhao)Co,Ltd.,Rizhao 276800,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2021年第6期1600-1607,共8页
Journal of Engineering Thermophysics
基金
国家重点研发计划资助(No.2018YFC1901300)。
