半干法烟气脱硫技术

))))))))FGD——FlueGasDesulfurization41235FGDWetDrySemi-dry()()WetFGDWastedisposalsystemReagentPreparationGasHandlingandSulfurDioxideAbsorber••••Dry-FGDSemidryFGDSemidryFGDSemidryFGD3)–.)–Ca(OH)2CaO)–.)–.)–CaOCa(OH)2)–.)–SOx)–.)–.)–A–B–C)–C1–C2%100×−−=ACBA%100CCC121×−=)––)––)(vdpft=H12H134231tastdtwRH=1.0H(kg/kg)t()00.050.10.150.20.250.30.350.40.45qAB12345f=f=f=f=f=)ppmmg/Nm31ppm=2.86mg/Nm3)SO2mg/Nm3237t273mg/m31+=αα''×=CC——mg/m3——mg/m3————1.41.229.209.20'O−=αC'C'αα140200RH2CaSO3SO220g/m3Ca(OH)2Ca(OH)26585RH50901-SO2•1•––µ2SO2SOµm.CaO•–––––22)(OHCaOHCaO→+3222SOHOHSO→+OHCaSOSOHOHCa233222)(+→+2SO2SO3CaSO)()(33SCaSOLCaSO→)(3LCaSO)(21)(423LCaSOOLCaSO→+•3¾Ca/S01230100Ca/S•3¾T=AST+AAST01020300100AAST•3¾0100•••Semi-dryFGDProcess)CFB-FGD(CirculatingFluidizedBedFGD))SDA(SprayDryingAbsorption))GSA(GasSuspensionAbsorptionFGD))RCFB(RefluxCirculatingFluidizedBedFGD))DSI(In-ductDrySorbentInjection))LIFAC(LimestoneInjectionintotheFurnaceandActivationofCaiciumoxide))LIMB-Coolside(LimestoneInjectionMultistageBurnerCoolside)+Coolside)BLI(BoilerLimestoneInjectionActivation)SDASprayDryingAbsorption•80•15000MW6000MW500MW•“”SDA198423500Nm3/h199070000Nm3/h•3.5%Ca/S=1.480%SDASprayDryingAbsorption¾¾¾¾SDASprayDryingAbsorptionSDASprayDryingAbsorptionSDASprayDryingAbsorptionSDAGSA(GasSuspensionAbsorptionGSA——GSAF.L.Smithmiljoa/sGSAGSA1985GSASO2HCI1988RoskildeKARAGSA17GSA152GSA(GasSuspensionAbsorption•GSAGSA(GasSuspensionAbsorptionGSA(GasSuspensionAbsorptionGSA(GasSuspensionAbsorptionShawneeFossilPlant10MWeGSA-FGDGSA(GasSuspensionAbsorption•GSA¾GSA¾¾GSA(GasSuspensionAbsorption•GSA999999999CFB-FGD(CirculatingFluidizedBed—FGD•LLB-LurgiLentjesBischoffCFB-FGDACBDDCFB-FGD112DCFB-FGD•“”“”02135540.102269643.102135541.X02135539.82LIMB-Coolside(LimestoneInjectionMultistageBurnerCoolside)•LIMBCoolsideNaOHNa2CO3LIMBLIMB-CoolsideCoolsideProcessLIMB-CoolsideLIMB-CoolsideLIMB-CoolsideLIMB-CoolsideLIMB-CoolsideLIMB-CoolsideLIMB-CoolsideLIFACLimestoneInjectionintotheFurnaceandActivationofCaiciumoxide•SO2CaOSO2SO2ESPESP75-85%LIFAC)LIFAC•80%325Ca/S=2.0AAST=7-12F70%)80%200Ca/S=2.0AAST=7-12F15%)Ca/SAASTESP)ESPCa/S=2.0AAST=5F85%)ESPLIFACLIFAC123456—789P123456—789FGDFGD60—73WWCaSO3.l/2H2O16—23WWCa(OH)21.0—4.0WW2.5—4.0WWCaSO42.0—4.0WWCaCl2.1/2H2O0.3—0.5WW0.4—0.6WW(1)(2)(3)145027001100320/min110025%11.2%21212