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1、第31卷第8期中國電機工程學報Vol.31No.8Mar.15,20112011年3月15日ProceedingsoftheCSEE?2011Chin.Soc.forElec.Eng.1文章編號：0258-8013(2011)08-0001-06中圖分類號：TK227文獻標志碼：A學科分類號：470?20燃燒調整對NOx排放及鍋爐效率的影響1211肖海平，張千，王磊，孫保民(1．電站設備狀態(tài)監(jiān)測與控制教育部重點實驗室(華北電力大學)，北京市昌平區(qū)102206；2．神華國華(北京)電力研究院有限公司，北京市豐臺區(qū)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次風比例增加，NOx和鍋爐效率都下降；隨著燃盡風擋板NOxemissionreductionwereperformedonan1025t/hboiler.開度增大，爐內火焰平均溫度下降，NOx排放濃度下降，鍋Bychangingthefactorssuchastheoxygencontent,top爐效率變化較??；不同配風方式下，束腰型配風工況
4、的鍋爐tertiary-air,overfire-airandthedistributionofsecond-air,the效率最高，NOx排放量最低，均勻配風工況下NOx排放濃regularityofNOxemissionsconcentrationandboilerefficiency度增加了14.20%。在保持一定鍋爐效率的前提下，燃燒調indifferentworkingconditionswerestudied,andtheresults整可以降低NOx排放濃度10%~20%。indicatesthatchangeofaveragetemperatu
5、reofflameinfurnaceisverysmallunderdifferentoxygenconcentrations.關鍵詞：燃燒；NOx排放；三次風；燃盡風；鍋爐效率Thefuel-NOxandtheboilerefficiencyrapidlybecomegreater0引言withincreasingtheoxygencontent,buttheydecreasesbyincreasingthetoptertiary-airgradually.Withtheoverfire-airNOx是主要大氣污染物之一。排入大氣的NOxincreasing
6、,averagetemperatureofflameinfurnaceandNOx引起酸雨和光化學煙霧污染，破壞臭氧層，嚴重破emissiondecreases,howeverthisinfluenceonboilerefficiency壞生態(tài)環(huán)境，危害人類健康。在中國，50%以上的maybeneglected.TheexperimentsalsoconfirmedthattheNOx來源于電站燃煤鍋爐。目前火力發(fā)電企業(yè)控制mostboilerefficientandtheminimumNOxemissionsoccurresNOx排放的主要技術有煙氣脫硝及爐
7、內燃燒過程脫inconstrictedairdistributionmode,bycomparison,inuniform硝。煙氣脫硝如選擇性非催化還原(selectivenon-mode,theNOxemissionsincreases14.20%.Onthepremiseofacatalyticreduction，SNCR)和選擇性催化還原certainboilerefficiency,theNOxemissionscanbereducedby(selectivecatalyticreduction，SCR)技術，脫硝率高，10%~20%throughco
8、mbustion-adjustment
