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1、第31卷第8期中国电机工程学报Vol.31No.8Mar.15,20112011年3月15日ProceedingsoftheCSEE©2011Chin.Soc.forElec.Eng.1文章编号：0258-8013(2011)08-0001-06中图分类号：TK227文献标志码：A学科分类号：470⋅20燃烧调整对NOx排放及锅炉效率的影响1211肖海平，张千，王磊，孙保民(1．电站设备状态监测与控制教育部重点实验室(华北电力大学)，北京市昌平区102206；2．神华国华(北京)电力研究院有限公司，北京市丰台区100069)EffectofCombustion
2、AdjustmentonNOxEmissionandBoilerEfficiency1211XIAOHaiping,ZHANGQian,WANGLei,SUNBaomin(1.KeyLaboratoryofConditionMonitoringandControlforPowerPlantEquipment(NorthChinaElectricPowerUniversity),MinistryofEducation,ChangpingDistrict,Beijing102206,China;2.ShenhuaGuohua(Beijing)ElectricPow
3、erResearchInstituteCo.,LTD,FengtaiDistrict,Beijing100069,China)ABSTRACT:Thecombustion-adjustmentexperimentsfor次风比例增加，NOx和锅炉效率都下降；随着燃尽风挡板NOxemissionreductionwereperformedonan1025t/hboiler.开度增大，炉内火焰平均温度下降，NOx排放浓度下降，锅Bychangingthefactorssuchastheoxygencontent,top炉效率变化较小；不同配风方式下，束腰型配风工况
4、的锅炉tertiary-air,overfire-airandthedistributionofsecond-air,the效率最高，NOx排放量最低，均匀配风工况下NOx排放浓regularityofNOxemissionsconcentrationandboilerefficiency度增加了14.20%。在保持一定锅炉效率的前提下，燃烧调indifferentworkingconditionswerestudied,andtheresults整可以降低NOx排放浓度10%~20%。indicatesthatchangeofaveragetemperatu
5、reofflameinfurnaceisverysmallunderdifferentoxygenconcentrations.关键词：燃烧；NOx排放；三次风；燃尽风；锅炉效率Thefuel-NOxandtheboilerefficiencyrapidlybecomegreater0引言withincreasingtheoxygencontent,buttheydecreasesbyincreasingthetoptertiary-airgradually.Withtheoverfire-airNOx是主要大气污染物之一。排入大气的NOxincreasing
6、,averagetemperatureofflameinfurnaceandNOx引起酸雨和光化学烟雾污染，破坏臭氧层，严重破emissiondecreases,howeverthisinfluenceonboilerefficiency坏生态环境，危害人类健康。在中国，50%以上的maybeneglected.TheexperimentsalsoconfirmedthattheNOx来源于电站燃煤锅炉。目前火力发电企业控制mostboilerefficientandtheminimumNOxemissionsoccurresNOx排放的主要技术有烟气脱硝及炉
7、内燃烧过程脱inconstrictedairdistributionmode,bycomparison,inuniform硝。烟气脱硝如选择性非催化还原(selectivenon-mode,theNOxemissionsincreases14.20%.Onthepremiseofacatalyticreduction，SNCR)和选择性催化还原certainboilerefficiency,theNOxemissionscanbereducedby(selectivecatalyticreduction，SCR)技术，脱硝率高，10%~20%throughco
8、mbustion-adjustment
