严晓勇,谢新华,周健,李明磊

• 1:国能(福州)热电有限公司
• 2:苏州西热节能环保技术有限公司

摘要(Abstract)：

随着火电机组利用小时数不断下降，调峰日益频繁，现有喷氨混合技术已不能满足燃煤电厂新常态的需求，超低排放对SCR反应器入口NH_3/NO_x摩尔比分布均匀性提出了更高的要求。通过CFD数值模拟和物理模型试验，对格栅型AIG和静态混合器进行了优化研究，提出了保证喷氨格栅布氨均匀、调节灵活、抗堵灰的设计方法和防堵型AIG喷嘴，并研发出了一种三角形大范围烟气自混合装置，提高了SCR反应器入口NO_x质量浓度场的均匀性，从根源上提升了SCR脱硝装置的负荷适应性。某2×600 MW机组的SCR脱硝装置采用本技术改造后，高中低负荷下SCR反应器出口NO_x分布相对标准偏差达到了8%～19%，高负荷下氨逃逸下降了51%。

关键词(KeyWords)： 燃煤电厂;脱硝;喷氨格栅;静态混合器;负荷适应性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 严晓勇,谢新华,周健,李明磊

DOI: 10.19666/j.rlfd.202404076

参考文献(References)：

• [1]王乐乐,孔凡海,何金亮,等.超低排放形势下SCR脱硝系统运行存在问题与对策[J].热力发电, 2016,45(12):19-24.WANG Lele, KONG Fanhai, HE Jinliang, et al.Difficulties and countermeasures of SCR denitration system operation in ultra low emission situation[J].Thermal Power Generation, 2016, 45(12):19-24.
• [2] CZARNECKI L, OLIVEIRA P. Emerging challenges and design strategies for SCR systems[C]//Proceedings of the ASME 2014 Power Conference, July 28-31, 2014,Baltimore, Maryland, USA.
• [3]徐波,陈锋,孙漪清,等.燃煤电厂SCR烟气脱硝喷氨静态混合技术研究[J].能源与节能, 2017, 22(10):86-88.XU Bo, CHEN Feng, SUN Yiqing, et al. Study on static mixing technology of ammonia injection in SCR flue gas denitration in coal-fired power plants[J]. Energy and Energy Conservation, 2017, 22(10):86-88.
• [4]孙克勤,秦钟,华玉龙,等. SCR反应器短直进口段混氨技术研究[J].中国环保产业, 2007(3):10-13.SUN Keqin, QIN Zhong, HUA Yulong, et al. Study on ammonia mixing technology in short straight inlet section of SCR reactor[J]. China Environmental Protection Industry, 2007(3):10-13.
• [5]韩发年,闫志勇. SCR烟气脱硝工艺喷氨混合装置研究进展[J].化工进展, 2015, 34(12):4151-4157.HAN Fanian, YAN Zhiyong. Advances in ammonia injection and mixing device of SCR-deNOx system[J].Chemical Industry and Engineering Process, 2015,34(12):4151-4157.
• [6]宋玉宝,赵鹏,姚燕,等. SCR脱硝不均匀反应宏观模型研究[J].中国电力, 2019, 52(5):176-184.SONG Yubao, ZHAO Peng, YAO Yan, et al. Study on the macro mon-uniform catalytic de-NOx reaction model for SCR system[J]. Electric Power, 2019, 52(5):176-184.
• [7]黄庆华,宋丽云,何洪.一种SCR脱硝装置喷氨混合系统的结构优化设计[J].环境工程, 2016, 34(5):59-64.HUANG Qinghua, SONG Liyun, HE Hong. Structural optimization of a SCR de-NOx unit with ammonia spray mixing system[J]. Environmental Engineering, 2016,34(5):59-64.
• [8]周英贵,金保昇.基于非均匀入口条件的SCR氨喷射方法[J].华中科技大学学报(自然科学版), 2016, 44(4):121-126.ZHOU Yinggui, JIN Baosheng. Ammonia injection method for SCR based on non-uniform inlet condition[J].Journal of Huazhong University of Science&Technology(Natural Science Edition), 2016, 44(4):121-126.
• [9]周健,梁俊杰,黄飞,等.应用SCR氨喷射技术解决空预器硫酸氢铵堵塞问题[J].电站系统工程, 2018,34(3):46-48.ZHOU Jian, LIANG Junjie, HUANG Fei, et al.Application study of ammonia injection technology on solving ABS block problem of air heater[J]. Power System Engineering, 2018, 34(3):46-48.
• [10]许剑,尚桐,刘斌,等.基于氨空混和技术的SCR脱硝系统氨耗量控制[J].热力发电, 2019, 48(8):76-80.XU Jian, SHANG Tong, LIU Bin, et al. Control of SCR denitrification system based on ammonia air mixing technology[J]. Thermal Power Generation, 2019, 48(8):76-80.