烟气脱硫系统液气比控制指标探讨

陈莲芳徐夕仁(,250061)通过对双碱法烟气脱硫系统的原理工艺过程的分析,阐述了液气比这一操作参数的重要性,并通过对该系统的物质平衡分析提出了理论计算液气比的公式,并针对工程实际中正确运用该公式提出了意见和建议双碱法烟气脱硫液气比1,,,,,,[1],,,,SO2,,,,,[2],221脱硫原理(thedoublealkalicprocess),(,)SO2SO2pH,,,,,(),:2NaOH+SO2Na2SO3+H2ONa2SO3+SO2+H2O2NaHSO3,:2NaHSO3+Ca(OH)2Na2SO3+CaSO312H2O+32H2ONa2SO3+Ca(OH)2+12H2O2NaOH+CaSO312H2O,:2NaHSO3+CaCO3Na2SO3+CaSO312H2O+CO2+12H2O22工艺过程介绍[3]1:,,,,SO2,,Ca(OH)2,,,,,,SO2,3lLG(l=LG)l,,,31根据排放要求确定液气比452005122361,,,:(1),,(2)Na+,(3),(4)(5),2:2Gm3h;Lm3h;CsinSkmolm3;CsoutSkmolm3;CSO2inSO2mgm3;CSO2outSO2mgm3,SO2,SO2CSO2inCSO2out,CsinCsout,SO2,,,,:Na+OH-H+Ca2+SO2-3SO2-4HSO-3,,,,pH,HSO-3,,Na+OH-H+Ca2+SO2-3SO2-4,Na+OH-H+Ca2+SO2-3SO2-4HSO-3,:Csin=[SO2-3]in+[SO2-4]inCsout=[SO2-3]out+[SO2-4]out+[HSO-3]out[SO2-3]inSO2-3kmolm3;[SO2-4]inSO2-4kmolm3;[SO2-3]outSO2-3kmolm3;[SO2-4]outSO2-4kmolm3;[HSO-3]outHSO-3kmolm3:=CSO2in-C0SO2outCSO2in100%C0SO2outmgm3:10-6CSO2inG64=(Csout-Csin)L:l=10-6CSO2in64(Csout-Csin)(1)CSO2in,CsinCsout,,32根据安全经济运行确定液气比31,,:(1)ll,,,pHpH,S46200512236Csout,(1):l=10-6CSO2in64(Csout-Csin)l(2)l,,(3)31,,,,,4(1),,(2)(1)l=10-6CSO2in64(Csout-Csin)(3),,(4)lpH,,,1..:,1981.5.2P.N.R.A..,:,1991.10.3..,2001.4.4,..,1996,14(2):4.250061(0531)8392114(O)[e-mail]2004-12-09(44),,,,,,,,,:(1)80%,92%,500Pa(GB184832001)(2),,,(3),,(4),,(5),,,,,,,09~11kgm3,5(1),,,800~15001000m3;,,,(2),,80%,92%,1,..,2003.21(4).2..:,1998.3.GKYJ().,2002.20(2).4,,..,2003.22(1).5..:,1992.6,..:,1984.510405248(020)[e-mail]2005-04-0547200512236THETECHNICALANDECONOMICANALYSISOFNEWTYPEWETANDCENTRIFUGALDEVICEOFCOOKINGFUMESCRUBBINGPeiQingqingetal(42)AbstractBasedontheprincipleofwetprocessandcentrifugalprocess,acompoundcookingfumescrubbingdevicewasestablishedwithsimplestructure,whichcanrunmoreefficiently.Itsmaintenanceismoreconvenient.Itsgreatadvantageisthattheinitialcostofthedeviceisabout800~1500yuanper1000m3cookingfumeanditismoreeasilycleaned.Theresultofthetestindicatesthatthepurificationefficiencyisabove80%andcanbeupto92%atmost.Aboveall,theinitialcostandrunningexpenseofthisdeviceislesswhencomparedwiththecookingfumescrubbingequipmentswhichhasthesamepurificationefficiency.Keywordscookingfumescrubbing,wetprocesscentrifugingandeconomyDISCUSSIONONAPPROPRIATELIQUIDGASRATIOFORFLUEGASDESULPHURIZATIONPROCESSChenLianfangetal(45)AbstractTheprincipleandworkprocessofdoublealkalicfluegasdesulphurizationprocesswereanalyzedandtheimportanceofliquidgasratiowasalsoexplainedclearly.Aformulaforthecalculationofliquidgasratiowaspresentedonthebasisofsubstanceequilibriumanalysis,somesuggestionsonhowtousethisformulaforactualengineeringweregivenalso.Keywordsdoublealkalicprocess,fluegasdesulphurizationandliquidgasratioTHESTUDYONTHEWASTEWATERSLUDGEINCINERATIONTECHNOLOGYLiJunetal(48)AbstractAtpresenttheincinerationtechnologyisthoughtasoneofthemostpracticabletechnologyinthefieldofsewagesludgetreatmentintheworld.Inmostofcountries,suchasEuropeancountries,America,Japan,etc.,thistechnologyhasbeenverypopularandoperatedsuccessfullystepbystep.Itsobviousadvantagesarefastdisposalspeed,decreasingcomponentsefficientlyandrecycleenergyaswell.Andintherecentyearsmostofcountriesmakemuchmorestrictregulationsonthetimeandspaceofdisposingwastes,soincinerationtechnologyhasbeenamainmethodofsewagesludgetreatment.InChina,thestudyonwastesincinerationlagsbehindthedevelopedcountries,especiallylackingoffundamentalresearchonthefieldofsewagesludgeincineration.Therefore,thetechnologyofincinerationbecomesincreasinglynecessary.Keywordsexcesssludge,wastewatersludgetreatmentandincinerationtechnologyTREATMENTPROCESSOFMEDICALWASTESANDSELECTIONOFMOVINGBEDTHERMALDECOMPOSITIONFURNACEChenMingyuan(53)AbstractAstheestablishmentandimplementationofthestatutesandregulationsfortreatingmedicalwastesinChina,morehigherrequirementsareimposedonthetechnologyandequipmentstoreduceandeliminatethewastesormakethemrecyclablecompletely.ThefeaturesofthetechnologyandthermaldecompositionfurnaceselectedanddesignedfortreatingthemedicalwastesinacityofcentralChinaaredesribedindetail.Keywordsmedicalwastes,thermaldecomposition,dioxin,fluegasandactivecarbonadsorptionEXPERIMENTALRESEARCHONHEAVYMETALREMOVALFROMMUNICIPALSLUDGEBYMICROBIALLEACHINGHuangMingetal(55)AbstractMunicipalsludgewithplentifulnutritionforcropgrowingispotentialfertilizer,buttheconcentrationsofheavymetalsarefrequentlyhigherthanthecontrolstandardforpollutantsinsludgefromagriculturaluse.Therefore,itisnecessarytotakesomemeasurementstoremoveheavymetalsfromsludgebeforeitsusingasfertilizer.Inordertoremoveheavymetalsinsludgethroughmicrobialleachingofsulfurbacilli,themunicipalsludge,takenfromGuilinSewageTreatmentPlant,wasusedascultivatingmediumandreductivesulfurasgrowingsubstrateforbacteriametabolism.Whendosingratiowas5gLandrefluxrateofinoculationsludgewas15%inbioleachingtest,thetimeofsludgeacidificationwasreducedto5days.Theremovalratesofcopper,zincandcadmiumwereupto70.8%,80.4%and78.9%,respectively.Simultaneously,theresidualconcentrationsofheavymetalscouldmeetthenationalstandardforagriculturalusage.Keywordssurplussludge,heavymetalandmicrobialleaching