中国电力2018，Vol.51Issue(2)：143-148,6.DOI:10.11930/j.issn.1004-9649.201701050
SCR脱硝系统超低排放运行优化技术研究
Study on Operation Optimization of SCR Denitrification with Ammonia-Injection for Ultra-Low Emission
摘要
Abstract
A 600 MW coal-fired unit with one more layer of backup catalyst is taken as an example in this paper to measure the NOx concentration distribution at the SCR reactor outlet,the NOx concentration deviation between the outlets of the SCR reactor and the FGD tower,and the concentration of ammonia slip,for the purpose of improving the operation quality of the thermal power plant after the ultra-low emission technical transformation.Some problems,such as the ammonia injection optimization and blocked ammonia branch nozzle dredging,are resolved and the corresponding adjustment is applied.The low NOx burner reformation decreases the NOx concentration at the SCR inlet.To avoid adverse effects due to excessive ammonia injection,it is suggested that the denitrification efficiency should be lowered accordingly,i.e.to control the ammonia injection to a certain level based on the NOx emission standard.The catalyst activity of the unit is evaluated,and the constraint indexes of catalyst replacement,installation or regeneration strategy selection are proposed.关键词
燃煤电厂/选择性催化还原(SCR)/超低排放/氨逃逸/运行优化Key words
coal-fired power plant/selective catalytic reduction (SCR)/ultra low emission/ammonia slip/operation optimization分类
资源环境引用本文复制引用
方朝君,卢承政,白晓龙..SCR脱硝系统超低排放运行优化技术研究[J].中国电力,2018,51(2):143-148,6.基金项目
中国华能集团科技项目(No.HNKJ17-H11).This work is supported by Science and Technology Project of China Huaneng Group (No.HNKJ17-H11). （No.HNKJ17-H11）
