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237Vol.23No.7Jul.200320037ProceedingsoftheCSEE©2003Chin.Soc.forElec.Eng.0258-8013(2003)07-0178-05TK222A470⋅2040,,,,,(310027)THEDIFFUSIONCHARACTERISTICSOFTHEHORIZONTALFUELRICH-LEANGAS-SOLIDBURNERFLOWZHOUHao,DULi-long,WANGZheng-hua,ZHENGLi-gang,CENKe-fa,FANJian-ren(CleanEnergyandEnvironmentEngineeringKeyLaboratoryofMOE,InstituteforThermalPowerEngineering,ZhejiangUniversityHangzhou310027,China)ABSTRACT:Whenagas-solidflowjetflowthroughahorizontalfuelrich-leanburner,itwillbifurcateintorichandleantwoflowsonahorizontalplanewiththerichoneonthesideofupstreamandfacingthefireballinthefurnace,whiletheleanoninthedownstreamandleewardthefireballtoobtaintheeffectsofflamestability,slagging-prevention,corrosioncontrollingandNOxemissionreduction.However,itmightbedoubtediftherichandleanstreamwouldmixtogethersoonbecausethereisonlyathinpartitionwallbetweenthemattheoutletoftheburners.Ifso,thatwillleadtoaneffectingettinglossinadvantagesduetothebifurcationofthetwojets.Inordertosolvethisproblem,asimulationtesthasbeenconductedusingamethodofopticalwaveandanopticallaserfiberprobetotestthemixturecharacteristicsofthetwojets.Thetestresultsshowthatthebifurcationoftwojetswillkeepinaquitelongjourney,thatmeansthattheadvantagesduethefuelrich-leancombustionwillbeguaranteed.KEYWORDS:Gas-solidmultiphasejetflow;Concentrationmeasurement;Fuelrich-leancombustionNOx2001CB409600ProjectSupportedbySpecialFundoftheNationalPriorityBasicResearchofChina(2001CB409600).1NOxPM7179PDA[1]PDAPDAPDA2[2][3]0Tu(t),∫=TttuTI0d)(1(1)A/Du(t))(iukNi,...,2,1=NiiuNINikm,...,2,1,)(11==∑=(2)NI0[4]20mm10mm3mW[5]I0IA/D0.1%12A/D[6]13300MW145°45°90°90°45°90°90°V23m/s0.6kg/kg1:2.7082180232~3t/h45°90°(x=0,y=0)3140R80045°45°800yx(a)(b)8001Fig.1Thesketchofthehorizontalfuelrich-leanburner2Fig.2Thesketchofpilot-scalepneumaticlaboratoryfacility3m,1502020mm1004350mmxy1VVy/mmx/mmC/(kg⋅kg-1)350mmFig.3ThesolidconcentrationdistributionatZ=50mm4100mmVV5200mm7181y/mmx/mmC/(kg⋅kg-1)4100mmFig.4ThesolidconcentrationdistributionatZ=100mmy/mmx/mmC/(kg⋅kg-1)5200mmFig.5ThesolidconcentrationdistributionatZ=200mm6400mm50mm100mm250mm72~3m/s100mmVy/mmx/mmC/(kg⋅kg-1)6400mmFig.6ThesolidconcentrationdistributionatZ=400mmy/mmx/mm/(m⋅s-1)22.020.819.718.517.416.215.113.912.811.610.49.38.17.05.87400mmFig.7ThedistributionofgasphasemeanvelocityatZ=400mm5123V18223V4[1]XuMinghou,ShengChangdong,YuanJianwei.Two-phaseflowmeasurementsandcombustiontestsofaburnerwithcontinuouslyvariableconcentrationofcoaldust[J].Energy&Fuels2000,14(3)533-538.[2]KrohnDA.Fiberopticsensors-fundamentalsandapplications,2ndedition[M].InstrumentSocietyofAmerica,1992.[3](WuWeiliang,CaiXiaoshu,WangNaining,etal).Determinationoftheparticlesizeandconcentrationwiththefluctuationofthetransmissionlasersignals[J].JournalofUniversityofShanghaiforScienceandTechnology1999,21(2)177-179.[4]AliYilmaz,EdwardKLevy.Particlevelocityandconcentrationmeasurementsinleanphasepneumaticconveyingusingafiberopticprobe[A].ProceedingsofFEDSM’98,1998ASMEFluidsEngineeringDivisionMeeting[C],Washington,DC.1998,[5]CaiXiaoshu,PanYongZhi,OuyangXin,etal.(Thestudyofdiagnosingtherunningconditionofpulverizedcoalinpipe)[J].ProceedingsoftheCSEE2001,21(7)83-86.[6]ZhengGang,CaiXiaoshu,WeiJingming,etal.Astudyonmeasurementlower-limitofparticlesizerwithlightexitnction[J].ChineseJournalofScientificInstrument1998,19(5)504-507.2002-11-161973-(177Continuedfrompage177)LNGBraytonLNGLNGa~b[3][1]XuMinghou,ZhengChuguang,FengRong,etal.(Ovrviewoftraceelementsresearchincoalcombustionprocess)[J].(ProceedingsoftheCSEE),2001,21(10)33-38.[2]YuanZhulin,XuShisen.Simulationresearchonthemovinggranularbeddustfilterandexperimentalcontrast[J].(ProceedingsoftheCSEE),2002,22(4)41-45.[3]ZhangNCaiR.PrincipalpowergenerationschemeswithLNGdryogenicexergy[A].ProceedingsofECOS’02,Berlin,Germany[C],2002334-341.[4]KarashimaN,AkutsuT.DevelopmentofLNGcryogenicpowergenerationplant[C].Proc.17thIECEC,LosAnjeles.USA,1982399-404.[5]ChengWenlongITOTakehiroChenZeshao.AcryogenicpowergenerationcycleforrecoveringcoldenergyofLNG[J].JournalofChinaUniversityofScienceandTechnology1999,29(6)671-676.[6]KreyG.UtilizationofthecoldbyLNGvaporizationwithclosed-cyclegasturbine[J].JournalofEngineeringforPower,1980,102(2)225-230.[7]PaoloChiesa.LNGreceivingterminalassociatedwithgascyclepowerplants[A].ASMEpaper97-GT-441[C],Orlando,Florida,1997.[8],GaoLinWangYuJinHongguangetal.LNGAnovelbinarycyclewithintegrationoflow-levelwasteheatrecovery&LNGcoldenergyutilization[J].JournalofEngineeringThermophysics2002,23(4)397-400.2002-11-201968-1978-