330MW亚临界机组全负荷脱硝技术的应用  

Application of Full Load Denitrification Technology for 330 MW Subcritical Units

作　　者：李科文 周勇 马剑宇 简羽翔 Li Kewen;Zhou Yong;Ma Jianyu;Jian Yuxiang(Guoneng Jiangsu Jianbi Power Generation Co.,Ltd.Zhenjiang 212006,Jiangsu Province,China;Jiangsu Huifeng Renhe Environmental Protection Technology Co.,Ltd.,Taizhou 225300,Jiangsu Province,China)

机构地区：[1]国能江苏谏壁发电有限公司,江苏镇江212006 [2]江苏慧峰仁和环保科技有限公司,江苏泰州225300

出　　处：《发电设备》2024年第5期300-305,共6页Power Equipment

摘　　要：针对燃煤机组深度调峰工况下很难满足氮氧化物(NO_(x))超低排放的现状,对330 MW亚临界机组全负荷脱硝技术的应用进行了详细研究。结合技术路线原理,对某330 MW亚临界燃煤机组控制循环锅炉改造前后的脱硝效果进行对比分析。结果表明:通过省煤器热水再循环改造、汽轮机高压缸启动改为高、中压缸联合启动、机组启动过程中投运6号高压加热器、选择性催化还原(SCR)宽温脱硝催化剂改造4项技术的深度耦合,实现机组并网前脱硝,NO_(x)排放质量浓度小时均值始终低于35 mg/m^(3),满足超低排放(50 mg/m^(3))的要求。In view of the circumstance that it is difficult to meet the requirement of ultra-low emissions of nitrogen oxides(NO_(x))under deep peak regulation conditions in coal-fired units,detailed researches were conducted on the application of the full load denitration technology for 330 MW subcritical units.Combined with technical route principles,for a controlled circulation boiler in a 300 MW subcritical coal-fired unit,the denitrification effects before and after retrofit were compared and analyzed.Results show that,the denitrification system can put into operation before gird connection through the deep coupling of following four technologies,namely the implement of hot water recirculation retrofit in economizer,the change of steam turbine start-up mode from high pressure cylinder start-up to high and medium pressure cylinders combined start-up,the start operation of No.6 high-pressure feedwater heater during unit start-up process,and the selection of selective catalytic reduction(SCR)denitrification catalyst with a wide temperature range.Meanwhile,the hourly average mass concentration of NO_(x) emission is consistently below 35 mg/m^(3),which meets the requirement of ultra-low emission value(50 mg/m^(3)).

关 键 词：亚临界机组 全负荷 脱硝 深度调峰 

分 类 号：TM621.27[电气工程—电力系统及自动化]