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1、第15卷第1期沈阳化工学院学报Vol.15No.12001.3JOURNALOFSHENYANGINSTITUTEOFCHEMICALTECHNOLOGYMar.2001ArticleID:100424639(2001)0120001207RemovalofSO2fromFlueGasbyLimestoneinSemidryProcesswithPowder2ParticleSpoutedBed122LIUYun2yi,MAXiao2xun,KunioKato(1.ShenyangInstituteofChemicalTec
2、hnology,Shenyang110021,China;2.DepartmentofBiol.&Chem.eng.,GunmaUniversity,Japan)Abstract:WetridetouselimestonetoremoveSO2fromfluegasinanewsemidryFGDprocesswithapowder2particlespoutedbedsincelimestoneismoreeasilyavailableandseveraltimescheaperthanhy2dratedlime.This
3、paperreportedtheeffectsofoperatingparametersonSO2removal.TheexperimentalresultsshowedthatSO2removalefficiencyoflimestonewasconsiderablyenhancedinthepresentprocessbyincreasingCa/Smolarratioanddecreasingtheapproachtosaturationtemperatureandsorbentsize.Thus,thepresent
4、processwithlimestoneasSO2sorbentmaybeanattractivealternativetootherFGDtechnologiesintermsofremovalefficiency,priceandavailabilityofsorbent.Keywords:fluegasdesulfurization(FGD);powder2particlespoutedbed;limestoneCLCnumber:O631.5Documentcode:ASulfurdioxide,mainlyemit
5、tedfromfossilformCaSO4·2H2O:fuelcombustion,isamajorairpollutant.Itse2CaSO3·1/2H2O+1/2O2+3/2H2O→CaSO4·2H2O(3)missioncontroltechnologies,suchasdryFGD,SemidryFGDprocessistypicallyrepresentedsemidryFGDandwetFGDprocesses,havebeenbyspraydryscrubbers,whichhavebeendevel2ad
6、optedwidelyincommercialunits.Inasemidryopedasanalternativetowetscrubbers,andhaveFGDprocess,heattransfer,masstransferandthesecondlargestmarketsharefollowingwetchemicalreactionsoccurinareactorvesselsimul2scrubberscontributedtotheirfollowingadvan2taneously.Generally,t
7、heoverallchemicalreac2tages:wastewatertreatment,reheatingoffluetion,whichoccurswithahydratedlimeorlime2gas,sludgehandlingequipmentandalargespacestonesorbent,canbeexpressedinasimpleformarenotrequiredandcarbonsteelisusuallyusedinas:theconstructionofequipment.Thus,the
8、ircapitalforlimestone:costsaremuchlessthanwetscrubbers.However,SO2+Ca(OH)2→CaSO3·1/2H2O+1/2H2O(1)hydratedlimeismostlyusedasSO2sorbentinforlimesto
