谭增强, 姚皓, 周梦伟,等.SCR脱硝全区域NH₃/NO_x等摩尔比优化研究[J].河南理工大学学报（自然科学版）,2022,41(2):85-92.

TAN Z Q, YAO H, ZHOU M W, et al. Study on optimization of NH₃/NO_x molar ratio in the whole area of SCＲ denitrification system[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(2):85-92.

SCR脱硝全区域NH₃/NO_x等摩尔比优化研究

谭增强1,2, 姚皓1, 周梦伟1, 张安超3, 牛国平1, 姚伟2, 潘栋2

1.华能长江环保科技有限公司，北京 100031；2.西安热工研究院有限公司，陕西 西安 710054；3.河南理工大学 机械与动力工程学院， 河南 焦作 454000

摘要:为指导喷氨优化调整，对某煤粉炉选择性催化还原（selective catalytic reduction ， SCR）脱硝装置开展网格法现场测试。以现场实测的非均匀NO，质量浓度场和运行参数作为计算流体力学（CFD）模拟的输入条件，将计算的出口参数与实测值进行比较，发现计算与实测均表明A， B 侧脱硝反应器出口 NO，分布均匀性较差，局部氨逃逸较高。分析不同喷氨策略下出口 NO，质量浓度分布，获得最优喷氨策略，并在不停炉情况下开展喷氨调门优化。优化后脱硝出口氨逃逸降低到合理水平，空气预热器阻力降低到正常范围，机组运行的安全性与经济性得到了提高。

关键词:SCR;脱硝;氨逃逸;喷氨

doi:10.16186/j.cnki.1673-9787.2020070012

基金项目:国家自然科学基金资助项目（51306046）；华能集团总部科技项目（HNKJ18-H18）；清华大学-中国华能集团有限公司基础 能源联合研究院资助项目（U20YYJC01）

收稿日期:2020/07/06

修回日期:2020/09/28

出版日期:2022/03/15

Study on optimization of NH₃/NO_x molar ratio in the whole area of SCＲ denitrification system

TAN Zengqiang1,2, YAO Hao1, ZHOU Mengwei1, ZHANG Anchao3, NIU Guoping1, YAO Wei2, PAN Dong2

1.Huaneng Yangtze Environmental Technology Co. ， Ltd. ， Beijing  100031 ， China；2.Xi'an Thermal Power Research Institute， Xi'an，  710054 ， Shaanxi， China；3.School of Mechanical and Power Engineering， Henan Polytechnic University， Jiaozuo  454000 ， Henan， China

Abstract: In order to instruct the optimization and adjustment of ammonia injection，the grid-method field test was carried out for SCＲ denitrification device of a pulverized coal boiler． The measured non-uniform NO_x mass concentration field and operation parameters were taken as the input conditions of CFD simulation，and the calculated outlet parameters were compared with the measured values． It was found that the poor uniformity of NO_x distribution at the outlet of denitrification reactor on side A and side B，and the local ammonia escape was obvious． The distribution of NO_x mass concentration at outlet under different ammonia injection strategies was compared，and the optimal ammonia injection strategy was finally obtained． The ammonia injection valve optimization was carried out without boiler shutdown． After optimization，the ammonia escape at the denitration outlet was reduced to a reasonable level，and the resistance of air preheater was reduced to the normal range，which improved the operation safety and economy of the unit．

Key words:SCR;denitrification;ammonia escape;flow field

SCR脱硝全区域NH_3_NO_x等摩尔比优化研究_谭增强.pdf