湿法脱硫后净烟气酸露点计算公式的比较和评估

18210096(.210024HalsteadA.G.Okkes...TangZhi-yong,JinBao-sheng,SunKe-qin,ZhongZhao-ping(DepartmentofPowerEngineering,TheKeyLaboratoryofCleanCoalPowerGenerationandCombustionTechnologyofMinistryofEducation,SoutheastUniversity,Nanjing,210096,P.R.China)Determiningthefluegasaciddewpointtemperaturehasbecomethekeytoavoidlowtemperaturecorrosion.ThefluegasaciddewpointchangesaftertheWetMethodDesuphurization,howeveratpresenttheaciddewpointcalculationformulasseldomconsidertheeffectofthedesuphurization.Mostofthemarefitforcalculatingthefluegaswithoutdesuphurization,notforthecleanfluegasafterthedesuphurization.Thispaperreviewsthemainaciddewpointcalculationformulasatpresent,contrastsandevaluatesthemaincalculationformulasoffluegasaciddewpointtemperatureaccordingtotheexperimentdataofHalstead.Thefollowingresultsareobtainedfromthestudy:A.G.Okkesformulaand..formulaarefitforthecleanfluegasafterthedesuphurization;..formulapredictstheaciddewpointofthecleanfluegasmoreprecisely.Thispaperprovidesthesupportofthedewpointdetermination.Thermalpowerengineering;Aciddewpointtemperate;evaluation;Calculationmethod;(1979~)19H2SO4[1]H2SO4PierceR.MOkkesA.G.[3,4],VerhoffBancheroPierceOkkes[5,6]H2SO4H2O[7],11ldAsldtStfh+=ΠΠa05.11253ldtΠSΠAarSarAnetarQ,kgkJ/fhaSO3NotreDame3232lglg0329.0lg1029.0lg0269.07842.1/1000SOOHSOOHsldPPPPt+-+=OHP2--atm3SOP--SO3atmH2SO4()233lg05377.1lg06329.165515.116SOSOsldVVt++=3SOVSO314()24242lg0975.2lg0777.150219.113SOHSOHsldVVt++=42SOHV20()19.29943.2lg06.1lg83.10lg6.278809.10332++++=SOSOOHsldPPPtOHP23SOP3SO()aVtSOsld+×=-610lg203aaaa32lg26lg20186SOOHtsldjj++=OH2j3SOjOpHpSOtsld23lg7.18lg6.27255++=OHP23SOP()nSOHldsldpBtt42+=42SOHpatmBnsldtldtOHp2Pa35.1004332.4213434.02-=OHldPtSO3150ppm1020099%SO3[11]200H2SO4150ppmH2OH2SO41100ppm11203.3%Fig1Comparisonbetweentheresultsofaciddew-pointformulasandtheHalsteaddata02040608010070809010011012013014015016017021[1].[M]..1994377389[2]Müller,P.,Contributiontotheproblemoftheeffectofsulphuricaciduponthedew-pointtemperatureoffluegas[J]Chem.Eng.Tech.,1959,31:345390.[3]Pierce,R.M.,Estimatingaciddewpointsinstackgases[J],ChemicalEngineering,1977,4:125128.[4]Okkes,A.G.,Badger,B.V.,GetAcidDewPointofFlueGas[J],HydrocarbonProcessing,1987,7:5355.[5]Verhoff,F.H.,Banchero,J.T.,PredictingDewPointsofFlueGases[J],Chem.Eng.Prog.197470(8)7172.[6]SO2SO3H2O[7]Hodge,F.Galen.,Silence,W.L.;Wright,DennisPredictingthecorrosivityofanoperatingFGDsystem[J]PowerEngineering(Barrington,Illinois),1994,98(12):31-33.[8][9]Haase,R.,Borgmann,H.w.,Korrosion.1981,15:4749.[10][11]P.N.SnowdonM.A.Ryan.Sulfuricacidcondensationfromfluegasescontainingsulphuroxides[J].JournalofTheInstituteofFuel,1969,5:188189.