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(310027)[],,[],[1],,,NOx;,,,,,,,,1,,,,,,,,(),,(),,[2][3],,,22.1,,,,,(GB219-74,DT¥2000(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.STFT),,,,2.22.2.1,,,,2154:;,,,[5]F/MFMhrbrf(a)(1)F;M;hr;br;f(a),f(a);hr/br,hr/br681CAT670t/h,,,,(d=800mm),;(d=430mm),,,,,,,400t/h,500mm1000mm,,,12.2.2,,,,,,,2.2.3(1)(2)(3),C679t/h,R90=51.1%,R90=42%,34hR90=21%,,,,R70=9.2%R70=182%,33.12000(1)¦©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,(36)300MW,,12h6h,3.2,,3.3,,,,,111,1994(4)211,1997(1)311,19944,11,1996(5)5,11,19946,,1CAT#811993,,1972,1994,,(19),,N2O,N2O,N2O3(1),,,,N2O(2),,N2O(3)N2O,N2O1Pels,J.R.,Wojtowicz,M.A.andMoulijn,J.A..1992RankdependenceofN2Oemissioninfluidised2bedcombustionofcoal.Fuel.72:3733972A.N.Hayhurst,A.d.Lawrence,1995TheDevolatilizationofCoalandaComparsionofCharsProfucedinOxidizingandIn2ertAtmospheresinFluidizedBeds.CombustionandFlame.100:5916043Stubington,J.F.,KenW.K.Ng,BrendanMossandPeelerP.K.1997ComparisonofexperimentalmethodsfordeterminingcoalparticledevolatilizationtimesunderFBCconditions.Fuel.76:2332404MartinLGorbaty,Prominentfrontiersofcoalsciencepastpre2sentandfuture.Fuel.1994,73:1819105M.A.Wojtowicz,J.R.Pels.andJ.A.Moulijn.CombustionofCoalasasourceofN2Oemission,1993,FuelProcessingTech2nology.1716,1N2ONOx.7De.Soete.23rdSymposium(International)Combustion.Pitts2burgh:1990,257,,1974,,§2000(1)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.THERMALPOWERGENERATIONNo.1January2000ContentsONFUELBURNINGSYSTEMSOFLARGE-CAPACITYUTILITYBOILERSHeBoshuetal(8)Thispaperpresentsasummaryofthedevelopmentoffuelburningsystemsemployedinlarge-capacityutilityboilerswithunitcapacityof300-600MWinChina.TLCC-ANEWTECHNOLOGY-SCREENINGMODELFORELECTRICPOWERSTATIONXuYueetal(12)Thepaperpresentsatechnology-screeningmodel(TLCC),developedbyDOE(U.S)forelectricpowerstation,inwhichtheenvironmentalcostsareconclud2ed.Withthismodel.thetechnologyandfeasibilitystudyofagivenpowerstationcanbeperformed.Theconclusionsmaydiffergreatlywhenexternalcostsareconsidered,suchasthoseresultingfromenvironmentalimpact.INFLUENCEOFBOILERPARAMETERSONFURNACEHEATTRANSFERZhangYongfu(15)Thispaperpresentstheinfluenceoffurnacewalltemperatureonfurnaceradiativeheattransferandanimprovedfurnaceheattransfercalculationmethodisputforwardbasedontheanslysisofhightemperatureradiativeheattransferinfurnace.STUDYONN2OFORMATIONINCOALFIRED-FLUIDIZEDBEDZengDongetal(17)N2Oformationwasstudiedatdifferenttemperaturesonabenchscalefluidizedbedreactorforthreedifferentkindsofcoals.SpecialattentionwaspaidtoN2Oformationduringcoaldevolatilizationandcharcombustion.TestresultsindicatethatthetransformationrateofN2Odependsmuchoncoalrankindifferentstagesofcoalcombustion.ThereisahightransformationrateofN2Oduringcombustionofvolatilematter.Thehigherthevolatilecontent,thelowerthetrans2formationrateofN2O.ThemostinportantfactorinflucingN2Oemissionisthetemperatureinfurnace.STUDYANDTESTONHEATTRANSFEROFCFBSunXianbinetal(20)Atestofwater-wallheattransferwasconductedon1MWCFBCtestingfacility.TheimpactofCFBCoperationparametersonheattransferwasanalyzed.TheresultsprovidedatechnicalbasisforthedesignofCFBboileranddevelopmentofheattransfermodel.FURNACESLAGGINGOFTANGENTIAL-FIREDPCBOILERANDITSPREVENTIVEMEASURESLiFengruietal(22)Thispaperpresentsabriefintroductiontothefactorsthathaveimpactonfurnaceslaggingoftangential-firedboilersandpreventivemeasuresagainstfurnaceslagging.ANALYSISOFEXHAUSTSTEAMTEMPERATURERISINGOFHPTUBINEOFDOMESTIC300MWU2NITMANUFACTUREDWITHFOREIGNPATENTLiuAnetal(25)TemperaturerisingofHPturbineexhauststeam,whichaffectedtheeconomicperformanceofturbineunit,wasfoundduringoperationofa300MWturbineu2nitmanufacturedwithforeignpatent.Basedonfieldinvestigationandanalysisofunitdesign,operationandmaintenance,thefactorsaffectingtheeconomicper2formanceofHPturbinewereestimatedandthecausesoftemperaturerisingofHPturbineexhauststeamwereanalyzed.ANAPPROXIMATECALCULATIONMETHODTODETERMINETHEEFFECTOFFEEDWATERFLOWONTHERMALPERFORMANCEOFGENERATINGUNITJianCongguangetal(28)Basedonthermalbalancebetweenextractionsteamandfeedwaterinfeed-heaters,usingtheflugelformulaandmeasuredperformancecurvesunderisolatedconditionsandaddedheattransferequations,anapproximatecaculationmethodisgiventodeterminetheeffectoffeedwaterflowonthermalperformanceofgeneratingunit.FAILUREANALYSISOFROTORBLADEINTHE4THROWOFA21CN201TURBINEUNITLiFengetal(31)©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.