“W”型火焰锅炉低氮燃烧系统改造的技术研究  

Technical Research on Reformation of Low Nitrogen Combustion System of“W”Type Flame Boiler

作　　者：侯旭浩 HOU Xuhao(Huaneng Yunnan This Energy Co.,Ltd.,Qujing 655000,Yunnan,China)

机构地区：[1]华能云南该能源有限责任公司,云南曲靖655000

出　　处：《流体测量与控制》2023年第4期91-94,115,共5页Fluid Measurement & Control

摘　　要：该电厂在设计煤种条件下,炉膛出口NO_(x)浓度达到1300 mg/m^(3)。在现有入炉煤配煤掺烧条件下,炉膛出口NO_(x)浓度为1000~1100 mg/m^(3),简单地通过SCR脱硝去除烟气中NO_(x),难以满足超低排放需求。本文综合考虑低氮燃烧改造后锅炉燃烧经济性的差异以及降低改造失败的风险,低氮燃烧改造路线为:燃烧器整体更换为新型低氮燃烧器+拱上二次风优化改造+分级风优化改造+新增OFA系统等。采用低氮燃烧改造技术,可降低SCR入口NO_(x)浓度以达到超低排放要求,同时减轻SCR脱硝系统运行压力,降低锅炉安全运行风险,并可降低运行成本。Under the condition of designed coal,the NO_(x) concentration at the furnace outlet reaches 1300 mg/m^(3).Under the existing condition of coal blending coal into the furnace,the NO_(x) concentration at the outlet of the furnace reaches 1000~1100 mg/m^(3).NO_(x) in the flue gas is simply removed by SCR denitrification,which is difficult to meet the ultra-low emission demand.This paper considers the difference of boiler combustion economy and reduces the risk of transformation failure after the transformation,and the route of transformation of low nitrogen combustion is as follows:the whole burner with new low nitrogen burner+optimization transformation of arch secondary wind,optimization transformation of graded wind+new OFA system,etc.The low nitrogen combustion transformation technology is adopted to reduce the NO_(x) concentration of SCR inlet to meet the ultra-low emission requirements,and reduce the operating pressure of SCR denitration system,reduce the safe operation risk of the boiler,and reduce the operating cost.

关 键 词：低氮燃烧 燃烧器 优化改造 OFA 

分 类 号：TM621[电气工程—电力系统及自动化]