降低300MW贫煤锅炉NOX排放的试验研究

225Vol.22No.5May200220025ProceedingsoftheCSEE©2002Chin.Soc.forElec.Eng.0258-8013(2002)05-0157-04300MWNOX112214300742410007RESEARCHANDTESTFORREDUCINGNOXEMISSIONOFA300MWLEANCOAL-FIREDBOILERCHENGJun-feng1,ZENGHan-cai1,XIONGWei-li2,HUANGWei21.Nationallaboratoryofcoalcombustion,HuazhongUniversityofScienceandTechnology,Wuhan430074,China;2.Hunanelectricalpowerresearchinstitute,Changsha410007,ChinaABSTRACT:ThefactorsinfluencedtheNOXemissionofcoal-firedboilersareverycomplicated,includingcoalrank,furnaceconfigure,burnerarrangement,excessair,OFAanditstiltangle,curcumferentialairaswellasfueldistributionetc..AnexperimentalresearchandlowNOXretrofitwerecarriedoutona300MWleancoal-firedboilerinordertoobtaintheoptimaloperationconditions,inwhichbothlowNOXandhighefficiencyperformancecouldbeachieved.Theresultindicateditiseffective,NOXemissionscandecreasegreatlyto760mg/m3,andalmostnochangestoboilerefficency.KEYWORDS:coal-firedboiler;NOXemission;boilerefficiencyNOXOFANOX300MWNOXNOXNOX760mg/m320%NOXTK16ANOX300MWNOX500~1000mg/m3[1]GB13223-96300MWNOX650mg/m3199711NOXNOXB2NOXNOXB2300MWCEHG-1025/18.2-WM10t=540/540tgs=27491.6%5ABCDE1WR3WR203051302878mm1715822NOX300MWNOXF1594.5mmF2735mm14%23.3%3NOXSOFANOXWRWRWR1280842o48o19oFig.1TheburnerarrangementNOXNOXV%N%A%[2]NOXMSI500Test-33NOO2CO2[O2]=6%NOXNO2mg/m3NOXO2NOX300MW2NOXNOX[3]q4%q4q2%22.2m/sNOXNOX300MW2NOXNOXNOXNOXq2q4NOX300MW3NOXNOX5300MWNOX159NOXNOX[4,5]q4q21.25q2+q49.08.58.07.57.02021222324251000900800700(a)9.08.58.07.57.0(b)q2+q4()NOX()q2+q4()NOX()140012001000800v1/(m.s-1)[NOx]/mg·m-3[NOx]/mg·m-3NOXFig.2TheinfluenceoftheprimaryairrateandairdistributiononNOXemissionandboilerefficiencyNOX3NOXNOXNOX300.12MW240.4MW212.5MWq2+q4NOXNOX300MW65%90%55%60%2NOX9.08.58.07.57.0110010009008007001.191.251.33(a)9.08.58.07.57.06.51000900800700200220240260280300(b)/MWq2+q4()NOX()q2+q4()NOX()[NOx]/mg·m-3[NOx]/mg·m-3W/MWeaNOXFig.3TheinfluenceofexcessairandboilerloadonNOXemissionandboilerefficiencyNOX2NOXq4[6]NOX300MW2q4q2NOXNOXNOX[7,8]NOXNOXNOX23NOX964.84mg/m3883.36mg/m316022795.20mg/m3770.00mg/m3NOXNOXq4NOXNOX2NOXTab.2TheinfluenceofOFAandotherfactorsonNOXemissionandboilerefficiencyR90=9%R90=12%[O2]/%6.506.306.306.306.506.806.706.3q2/%5.595.395.515.595.615.795.185.42q4/%2.592.582.102.612.122.702.482.53(q2+q4)/%8.187.977.618.207.738.497.667.92h/%91.4291.5891.9591.3591.8291.0791.8891.60NOX[NOX]/(mg·m-3)795.20779.40792.00851.00790.00840.00883.36903.341F1594.5mmF2735mmNOX100mg/m32NOXNOXNOXNOXNOXNOXNOXNOX3NOXNOX760mg/m320%[1]ZengHancaiZhuQuanliNieMingjuNOXResearchandtestonNOXemissionperformanceofalargeleancoal-firedboiler[J]ThermalPowerGeneration1999215-19[2]BiYusenLiuZhenqiCENOXNOxemissionperformanceofCE-typecornerfireddirect-flowburnerinhuanengfuzhoupowerplant[J]ThermalPowerGeneration1992235-39[3]FuWeibiaoCombustion[M].BeijingHigherEducationPress1990377.[4]ZengHancaiCombustionandpollution[M].(WuhanHuazhongUniv.ofSci.&Tech.Press)1992[5]ZhaoHuifuNOXTheformationandcontrolofpollutantNOX[M]BeijingSciencePress1993[6]SpliethoffHGreulURuidigerHetalBasiceffectonNOXem-issionsinairstagingandreburningatabench-scaletestfacility[J].Fuel1996755560-568[7]XiaoLSChengJFZengHCEffectsofbluff-bodyburnerandcoalparticlesizeonNOXemissionsandburnout[J]JournaloftheInstituteofEnergy199972112-116[8]AbbaaTCostenPLockwoodFCetalTheeffectofparticlesizeonNOformationinalarge-scalePCFlaboratoryfurnace:measureme-ntandmodeling[J]CombustionandFlame1993933316-3262001-05-141974-1935-