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25420068SICHUANENVIRONMENTVol125,No14August2006:2006201224:(1961-),,,2001,,/1,2(11,266071;21,266071):/(FGD),FGD/FGD,,,:;;;;:X70113:A:100123644(2006)0420064204ProblemsandTechnicalMeasuresofWetLime/LimestoneFlueGasDesulfurizationProcessSUNWen2shou1,MENGYun2(11DepartmentofEnvironmentalScience&Engineering,QingdaoUniversity,Qingdao266071,China;21ChemistryDepartmentofNormalCollege,QingdaoUniversity,Qingdao266071,China)Abstract:Propertreatmentoftheproblemsofgypsumscalingandequipmentcorrosionetc1inwetlime/limestonefluegasdesulfurizationprocessisthekeytogainlongoperationtimeandadequatesystemperformance1Inthispaper,thecausesofgypsumscaleformationandequipmentcorrosion,andtheproblemsoffluegasreheatandtheoxidationofsulfitepertinenttoseparationofsolidfromliquidareanalyzed1Currenttechnicalmeasuresaresummarizedandcomparedtomakecleartheiradvantagesanddisadvantages1Consideringtechnique,economyandthesituationofChinacomprehensively,someviewpointsareputforwardtoadequatelysolvetheproblems1Keywords:Fluegasdesulfurization;corrosioncontrol;scaling;reheat;oxidation170,,(FGD),,,,20,,,,,/FGD,[13],,/,FGD,,2211(),,,pHpH[46],[7],,pH9[8,9],,pH610715[5,10,11],pH,pH,,15%80%90%,15%,,,[12];90%,,,212,:,;,21211A1HussP1K1Lim[13,14],(Mn2+Fe2+),,,,,[5],Gibson[12],,,,,,EPRI(H2S)[15]H2S,,FGD,,,21212,,,,,,,21213,,,,,,/[1618],/,Ca2+,[1921],,,[22],,,,,3311FGDFGD1125mm/a,5mm/a[23]:(1),,;(2),,,564:/;(3),,,,[24],,,,,FGD20FGD,,312FGD,:(1);(2);(3)31211[25],,;,;,,FGD,,FGD[26],,,,,,,,31212(),,,2130t/h,110t/h,375t/h,,,,,(),[27],,1/3,,,31213,C227601005mm/a[28],,316LFGD,,4411,50,,:,;SO2SO3,,,[29],,FGD412(),662510001100,,,,,,,,GGH,,80GGH,;,GGHGGH,FGD20%,GGH,,,GGH,GGH,GGH,,[30,31]5,,,,,,,,,,90%/,,,015%1%MgSO031030[32],MgSO03CaSO312H2O[33],6611,612613GGH,614,:[1]1SO2[J]1,2001,22(4):132161[2],,,1[J]1,1999,18(4):72111[3],1[J]1,1996,15(3):722751[4],,1[J]1,2002,22(5):62026241[5]ChangJCSetal1PilotTestingofSodiumThiosulfate[J]1Environ2mentalProgress,1986,5(4):22522331[6],,,1[J]1,2002,23(5):10521081[7]HargroveOWJr,etal1ResultsofLimestoneClearLiquorScrubbingTestsatEPRIpSEnvironmentalControlTechnologyCenter(ECTC)[A]1In:1995SO2ControlSymposium,Book2[C]1MiamiFlorida:ElectricPowerResearchInstitute,19951[8]KarlssonHT,etal1TechnicalAspectsofLime/LimestoneScrubbersforCoal2FiredPowerPlants,PartI:ProcessChemistryandScrubberSystems[J]1JournaloftheAirPollutionControlAssociation,1980,30(6):71027141[9]SlackAV,HollindenGA1SulfurDioxideRemovalfromWasteGas2es(SecondEdition)[M]1ParkRidgeNJ:NoyesDataCorporation,19751(103)764:/[14],,1[J]1,2002,(4):192211[15]1[J]1,2002,(4):4271[16],,1[J]1,2000,20(6):182221[17],1NH32N[J]1,1999,19(1):202211[18],,1[J]1,2003,55():13021321[19]1[M]1:,1993128222861[20]1[J]1,1999,(12):20022031[21],1[J]1,2002,3(2):652681[22],,1[J]1,1998,20(2):1241[23],,1[J]1,2000,18(6):282291[24],,,1[J]1,1996,15(2):20522091[25]1[J]1,2004,23(4):152191[26],,,1[J]1,2002,18(6):182221[27],,,1[J]1,2004,20(12):402421[28],,,1[J]1,2001,27(7):492511[29],,,1-[J]1,2004,36(12):1721217231(67)[10]LaniB,etal1ResultsofThioClearTesting:Magnesium2LimeFGDwithHighSO2RemovalsandSalableBy2products[A]1In:1995SO2ControlSymposium,Book2[C]1MiamiFlorida:ElectricPowerRe2searchInstitute,19951[11]FaramarzAzarm,etal1ComparisonofSO2RemovalbyLimestone,Limestone+DBA,andMagnesium2ContainingLimeintheWetScrubbersattheGibbonsCreekSteamElectricStation[A]1In:1995SO2ControlSymposium,Book1[C]1MiamiFlorida:ElectricPowerResearchInstitute,19951[12]OwensDR,etal1AddingSulfurtoFGDAbsorberReducesScale,UpsPerformance[J]1Power,1988,(5):152171[13]LimPK,etal1OxidationofAqueousSulfurDioxide131TheEffectsofChelatingAgentsandPhenolicAntioxidants[J]1TheJournalofPhysicalChemistry,1982,86(21):4233242371[14]HussAJr,etal1OntheUncatalyzedOxidationofSulfur()inAqueousSolutions[J]1JournaloftheAmericanChemicalSociety,1978,100(19):6252262531[15]JonesAF,etal1UseofSulfurFromLiquidRedoxProcessesasanOxidationInhibitorinWetFGDSystemsinPlaceofEmulsifiedSulfur[A]1In:1995SO2ControlSymposium,Book1[C]1MiamiFlorida:ElectricPowerResearchInstitute,19951[16],1SO22H2O2CaCO3pH[J]1,1997,19(5):1251[17],,1[J]1,2002,22(4):30523081[18]UkawaN,OkinoS,OshimaM,etal1EffectsofSaltsonLimestoneDissolutionRateinWetLimestoneFlueGasDesulfurization[J]1JChemEngofJapan,1993,26(1):11221131[19]MobleyJD,CassidyM,DickermanJ1OrganicAcidsCanEnhanceWetLimestoneFlueGasScrubbing[J]1PowerEngineering,1986,(5):322351[20],1FGD[J]1,2003,22(12):100121003,10161[21]SlackAV,etal1Lime2LimestoneScrubbing:DesignConsiderations[J]1ChemicalEngineeringProgress,1978,(2):712751[22],,,1/FGD[J]1,2003,16(4):50252,571[23]RitterhouseRC1FightingCorrosioninAirPollutionControlSystems[J]1PowerEngg,1991,95(6):232291[24],,,1[J]1,1999,15(2):232261[25],1FGD[J]1,2003,4(4):182221[26],1VEGF[J]1,2005,8(3):322351[27]1[M]1:,20041[28]GalenHodgeF,SilenceWL1PredictingtheCorrosivityonOperatingFGDSystem[J]1PowerEngg,1994,98(12):302331[29]CollinsS1WhattoLookforinHeatPipes,Gas2to2GasHeatEx2changers[J]1Power,1992,136(5):10221061[30],,,1GGH[J]1,2005,21(2):1231[31],,1GGH[J]1,2005,21(2):572591[32]SadaE,KumazawaH,HashizumeI1DesulfurizationbyLi