锅炉脱硝入口NOx浓度与O2(飞灰)的优化调整吴韬(贵州西电电力股份有限公司黔北发电厂,贵州金沙551800)摘要:锅炉脱硝系统自投运以来,存在脱硝催化剂堵塞、损坏严重等问题。为确保NOx排放指标在规定范围内,根据NOx生成原理,可通过降低燃烧区域含氧量的方式,控制SCR入口NOx的含量处于较低水平,从而达到降低氨耗的目的。但含氧量下调后,缺氧燃烧又会导致飞灰上升,影响锅炉效率。针对该问题对系统进行优化调整试验,探求合理的调整方式,并对不同方式下的经济性进行对比分析,为锅炉脱硝系统安全经济运行提供数据支撑和实际指导。关键词:脱硝;NOx;含氧量;飞灰中图分类号:TK229DOI:10.19768/j.cnki.dgjs.2023.04.053OptimalAdjustmentofNOxConcentrationandO2(FlyAsh)atBoilerDenitrationInletWUTao(QianbeiPowerPlantofGuizhouWestElectricPowerCo.,Ltd.,Jinsha551800,China)Abstract:Sincetheboilerdenitrationsystemwasputintooperation,therehavebeensomeproblemssuchasblockageandseriousdamageofdenitrationcatalyst.InordertoensurethattheNOxemissionindexiswithinthespecifiedrange,ac-cordingtotheprincipleofNOxgeneration,theNOxcontentatSCRinletcanbecontrolledatalowerlevelbyreducingtheoxygencontentincombustionarea,soastoachievethepurposeofreducingammoniaconsumption.However,whentheoxygencontentislowered,theflyashwillriseduetoanoxiccombustion,whichwillaffecttheboilerefficiency.Inthispaper,theoptimizati...