燃煤烟气中SO3成因_影响及其减排对策

SO3DiscussiononfluegasSO3formingmechanism,impactanditscountermeasures陈焱,许月阳,薛建明(,210031):煤燃烧过程中产生的SO3不仅造成了酸性烟雾,而且排放时会形成蓝色或黄色烟羽,增加了烟囱排放的烟羽浊度,破环了景观近年来,火电厂烟囱常见的蓝烟/黄烟现象给周边大气环境带来一定的影响针对部分燃煤电厂在脱硫脱硝装置投运后,出现蓝烟/黄烟现象进行了研究,并提出了可供选择的控制对策和建议:燃煤;SO3;气溶胶;蓝烟/黄烟;减排对策Abstrac:tTheemissionofthefluegasSO3generatedintheprocessofcoalcombustionnotonlyresultedintheemissionofacidfumes,andwillformablueoryellowplume,increasingtheturbidityplumeemissionsfromchminey,butalsodestroyingthelandscape.Pastyears,thermalpowerchmineycommonemergebluesmokeandyellowsmokephenomenonhasbringsomemipactonaroundenvironmen.tPartofthecoal-firedpowerplantsputintooperationofWFGDandSNCRdenitrificationequipments,theemergenceofbluesmoke/yellowsmokearestudiedandanalyzed,andalternativecontrolstrategiesandrecommendationsareputforward.Keywords:coa;lSO3;aeroso;lbluesmoke/yellowsmoke;emissionreductionmeasures:X701.3:B:1674-8069(2011)03-035-03,SO2NOx,,,2010,6kW,,90%,SCR/SNCR5000kW,SO3,,,,/,,SO3,/1/2000,Gavin/2600MWSCRFGD,,/,SCRFGD,1.1:;,H2SO4,;,;,:,,,,()1.2():;;;,H2SO4:国家高技术研究发展计划(863计划)(408007)352011年6月电力科技与环保第27卷第3期,H2SO4,,H2SO4[1],SCR,,,SO3,1010-6,/,,,2SO32.1SO3SO3,,SO2SO3,SO2,1%~5%SO2SO3420~600,SO2SO3[4]SCRTiO2V2O5V2O5-WO3V2O5-MoO3,,SO2SO3,SCR,SO20.25%~0.5%,0.75%~1.25%,2~3SCR,SCRSO350%2.2SO3H2SO4,,SO3H2SO4,,SO3H2SO4,H2SO4[2-3],,,,3SO33.1,,,,,H2SO4,,,,,3.2SO3SO3,600~650,SO3,SO3SCRNH3,(NH4)2SO4NH4HSO4,4SO34.1SO3,SO2SCR,SO3,SO390%,,,SO3[5]4.2SO3,SO3[6],SO3,,,,,CFBNIDSO380%~90%4.3ROFASO3ROFA,,ROFANOxCO362011年6月电力科技与环保第27卷第3期SO3(OFA),ROFA,50%NOx,80%SO34.4SCRTiO2,,TiO2SO2,WO3SO3,V2O5V2O5-WO3V2O5-MoO3SO2SO3,SO2/SO3SCR,,SO2/SO3,SCRTiO2,VW,,,SO34.5,SO3,90%[7];,ESP4.6SO3,,SO2,SCRSO2SO3,SO3[8-9]4.7(WESP)[10]WESP,WESP,WESP,,SO395%,5(1),,SO3(2)SO3,SO3,(3)SO3H2SO4,H2SO4,,(4)ESP,SO3SO3,SO3,:[1]DamleAS,EnsorDS,SparksLE.Optionsforcontrollingcondensationaerosolstomeetopacitystandards[J].JournaloftheAirPollutionControlAssociation,1987,(37):925-933.[2]BlytheR,Hawthorne.Furnaceinjectionofalkalinesorbentsforsulfuricacidcontrol[C].U.S.EPA/DOE/EPRICombinedPowerPlantAirPollutionControlSymposium,Chicago:2001.[3]GutberletH,HartensteinH,LicataA.SO2conversionrateofdeNOxcatalysts-effectsondownstreamplantcomponentsandremedialmeasures[C].thePowerGen1999,NewOrleans:1999.[4]HardmanR,StacyR,DismukesE.Estimatingsulfuricacidaerosolemissionsfromcoal-firedpowerplants[C].DOE-FETCConferenceonFormation,Distribution,Impact,andFateofSulfurTrioxideinUtilityFlueGasStreams,Pittsburgh:1998.[5]KumarKS,MansourA.WetESPforcontrollingsulfuricacidplumefollowingandSCRsystem[C].ICACForum2002,Houston:2002.[6]LevyEK.Effectofboileroperationsonsulfuricacidemissions[C].DOE-FETCConferenceonFormation,Distribution,Impact,andFateofSulfurTrioxideinUtilityFlueGasStreams,Pittsburgh,PA:1998.[7]SarunacN,LevyE.Factorsaffectingsulfuricacidemissionsfromboilers[C].EPRI/DOE/EPAAirPollutionControlSymposium:TheMegaSymposium,Atlanta:1999.[8]SvachulaJ,AlemanyLJ,FerlazzoN,eta.lOxidationofSO2toSO3overhoneycombdeNOxingcatalysts[J].IndEngChemRes,1993,32(5):826-834.[9]ZetlmeislMJ,McCarthyKJ,LaurenceDF.InvestigationofsomefactorsaffectingnonflamegenerationandsuppressionofSO3[J].IndustrialEngineeringandChemistryProductResearchandDevelopment,1983,(22):710-716.[10]YilmazA,PechulisM,DA'gostin.iColdendacidcondensationintubularairpreheaters[C].AmericanSocietyofMechanicalEngineers1995JointPowerGenerationConference,SanDiego:1995.:20101229;:20110503:(1977),,,E-mai:[e-mail]372011年陈焱等:燃煤烟气中SO3成因影响及其减排对策第3期