煤粉锅炉NOX排放特性及控制的研究

:025322409(2002)0120006205:2001203219;:2001208209:(991101040):(19652),,,,,E2mail:[e-mail],,,,,,(,310027):NOX,NOX,NOX,,NOX,NOX:;;;:TQ03:ANOX,NOX,NOX[13],NOXNOX,670tPhNOX,,NOX,,NOX,1670tPh(200MW),,,,,,,,,1998,,,,2NOXNONO2,N2O3N2ON2O4N2O5,NOX,NOX,NO90%,NO25%10%NOX:NOX(FuelNOX)NOX(ThermalNOX)NOX(PromptNOX)[4,5],NOX80%,N:NHCNNH3h[OH],[O]NOgNHi,NON2NOX,,HCN[N][CN]NHi([O]O2[OH])NO,NON2,NNOXNOXNOX(Zeldov2ich):N2+O\NO+N(1)N+O2\NO+O(2)N+OHNO+H(3)(2),NOX,15001600,30200212JOURNALOFFUELCHEMISTRYANDTECHNOLOGYVol130No11Feb12002©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.3NOXNOXMSI2000,,64,,NOX6%311NOX31111,90MW200MW(45%100%),1,NOX,,NOX,,NOX(31112),NOX,1,,,N1NOXFigure1InfluenceofboilerloadonNOXemission(1)Datongcoalblend;(2)Datongbituminous;(3)Pingshuobituminous31112,,NOXNOXNOX,NOX,,,,,NOX,[6]NOX,,,NOX,2200MW,NOX418%;150MW,511%,,,NOX2NOXFigure2RelationshipofO2andNOXemission31113NOX,3150MWNOX,,,,,NOX,25%,,(),,,,,NOX3NOXFigure3InfluenceofterminalaironNOXemissionatwoPCpreparation;bonePCpreparation;cnoPCpreparation;PCpulverizedcoal71:NOX©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.31114,,NOX,,,NOX,4307331,NOX549mgm-3652mgm-3,,,:,1500,NOX,NOX[6]NOX4NOXFigure4InfluenceofhotairtemperatureonNOXemission312NOX31211,,;,5,,NOX:,5NOXFigure5InfluenceofburneronNOXemissionaequalairdistribution;bgradeairdistribution,,NOX,NOXHCNNHi;,NOX,NOX,,,NOX,NOX31212,,,,5,200MW100MW,NOX131mgm-314mgm-3,,,,,,NOX313NOX,NOXNOX,80%,NOX,,NOX,NNOX61113%0191%,200MW150MW,NOX3619mgm-31414mgm-36NOXFigure6InfluenceofcoaltypeonNOXemissionaPingshuobituminous;bDatongcoalblend4NOX[7],NOX830©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,NOX,411,,NOX,,7,,,,,,NOX,,,NOX,,,,,NOX,7Figure7InfluenceofterminalaironcombustionatwoPCpreparation;bonePCpreparation;cnoPCpreparation412NOX,2,,;,,NOX,418%5%,,,,,,,,8,4%,NOX,,8Figure8InfluenceofO2onunburnedcarbonlossandboilerefficiency,,,,NOX,,,NOX,,,NOX,5(1),,NOX,(2)NOX,,,NOX(3),NOX,4%,NOX,(4),NOX(5),NOX91:NOX©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.[1]McCarthyK,LauxS,GrushaJ1Advancedfurnaceairstagingandburnermodificationsforultra2lowNOXfiringsystems[J]1FuelsCombustTechnol,1999,23(1):17921841[2]KimotoMasayoshi,TsujiHirofumi,MakinoHisao,etal1Scale2upofadvancedlowNOXandhighturndownpulverizedcoalburner[J]1JJapInstEnergy,1999,78(6):40424151[3]TadashiJimbo,TakayoKawase,ShigeruAzuhata1Latestlow2NOXcombustionsystemforcoal2firedutilityboilers[J]1HitachiRev,1990,39(6):32923381[4]RichardL,OliverB,DennisB,etal1UpdateonABBC2ESradiallystratifiedflamecorelowNOXwallburnertechnology[J]1FuelsCombustTechnol,1999,23(1):632711[5]BaxterLL,MitchellRE,FletcherTH,etal1Nitrogenreleaseduringcoalcombustion[J]1Energy&Fuels,1996,10(1):18821961[6]1[M]1:,19921272291[7]1NOX[J]1,1996,27(9):152191CHARACTERISTICSOFNOXEMISSIONANDREMOVALFORCOAL2FIREDUTILITYBOILERLIUJian2zhong,CAOXin2yu,ZHOUJun2hu,ZHAOXiang,ZHOUZhi2jun,HUANGZhen2yu,CENKe2fa(CleanEnergyandEnvironmentEngineeringKeyLaboratoryofMinistryEnducation,Hangzhou310027,China)Abstract:ThecharacteristicsofNOXemissionandcontrolfora670tonsteamperhourcoal2firedutilityboilerwerereported1Effectsofboilerload,excessiveair,hotairtemperature,terminalair,typeofburnerandcoalqualityonNOXemissionhavebeeninvestigated1TheresultsshowthatNOXemissionwillincreasewiththeincreasesinboilerload,hotairtemperatureandnitrogencontentincoal1AstheO2influegasincreases,NOXemissionincreasesfirst,andthendoesnotchangeorevendecreases1TheO2influegashasanoptimumvalueof4%forlowestNOXreleaseduringcoalcombustion1Afterpulverizedcoalpreparationsystemsgointooperationcompletely,theNOXemissionwilldecreaseremarkably1MoreoverthegradeairdistributionhaslowerNOXemissionthanequalairdistribution1Inaddit2ion,optimizingoperationforcombustionmayproducelowerNOXemissionandimprovecombustionefficiency1Keywords:pulverizedcoal;boiler;nitrogenoxide;combustionFoundationitem:ZhejiangProvinceKeyScienceandTechnologyProject(991101040).Authorintroduction:LIUJian2zhong(19652),male,Ph.D.,Professor,engagedincoalcombustiontechnologyandpollutioncontrol.E2mail:[e-mail]0130©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.