氮气气氛下城市污水厂污泥热解特性

*PyrolysispropertiesofmunicipalsewagesludgeundertheN2atmosphereZhaiyunbo,Weixianxun,Zengguangming,Zhangdejian,Chukaifeng(DepartmentofEnvironmentalScienceandEngineeringHunanUniversity,Changsha,Hunan,410082)Abstract:Inordertoobtainthepyrolysisproperties,thethermalgravimetricanalysisandFITRmethodswereusedtostudythepropertiesofdriedsewagesludgefromtheChangshacertainwastewatertreatmentplant.Theexperimentalresultsshowedthatthereare3stageslostweightunderthetemperatureratesof15/minand30/mintobeobserved.AndcombinedwiththeFITR,theCO2andH2Oappearedineverystage.TheexperimentaldataweredealwiththroughdifferentialcoefficientmethodsandobtainedthemechanicalequationofpyrolysisreactionandgainedthekineticsparameterEandA.Keywords:Sewagesludge,Thermalanalysis,FITR,Pyrolysis,Kineticsparameters11.111%%CHNSKJ.kg-142.3547.236.804.4035.663.803.221.8011.611.2NETSCHSTA409BRUKEEUINOX55105241~3mm100.002mg99.99%100ml/min15/min30/min850*863No.2001AA6440205022592620020532017-1-____________________________________________________________________________~6%FITRFITR1203207min~17min15%FITRCO2COCCCO2CO32055017min~38min30%FITRCO2COConesaXiaogeChen[678]DTG30/min15/minTGDTGN2N2N23DTA30/min15in30/minDTA/mN2DTG30/minDTA7202DTG100200300400500600700DTG-6-5-4-3-2-10-6-5-4-3-2-10200400600800DTA0.0.2.4.6.81.01.21.41.6DTA-.50.0.51.01.52.02.53.03.5200400600800TG4050607080901001104050607080901001101TG3DTA-2-中国科技论文在线____________________________________________________________________________[9,10])(ααkfdtd=)()(αRTE−=fAe1αAERTf(α)nf)1()(αα−=2nDTGTG()max0TGTGTG−=α3TG0%TGT%TGmax%(1)DTG,,φα⋅=maxTGDTGdtd4124()()nTGDTGα−1maxRTEeA−=φ5:()()[]=ααfdtdln()ARTEln+−(6)61/Tf(α)f(α)DTG219*x+13.2581EA2.2[2,11]DTGDTG(6)f(α)=1-αn,30/minDTGn0.200.250.51.01.5245230/minDTGDTGn=2γ=-0.8119*x+17.1350=0.134R2=0.906n=1γ=-0.6=0.189R2=0.899n=0.50γ=-0.6299*x+13.3954=0.133R2=0.903n=0.25γ=-0.6042*x+12.8847=0.113R2=0.946n=0.20γ=-0.5811*x+12.3809=0.109R2=0.976n0.22n=0.251)1()(αα−=f7E48.3KJ/molA2.3105min-1DTGn=0.5-3-中国科技论文在线____________________________________________________________________________)1(()αα−=f8γ=0.5405*x-7.7129=0.05R2=0.99E=44.9KJ/molA=3.810-4min-1DTGDTG=2315m8E=-5-13DTGEAectrolyte.JournalofEnvironmentalEngineering,,December,2000,108lofAnalyticalandAppliedPyrolysis,2001,927-94187,221-230.3-96307E=52.3KJ/molAin-1DTG50.3KJ/molA=4.410min3FITRDTGDTA1.C.P.Chu,D.J.Lee,andC.Y.Chang.Thermogravimetricanalysisofactivatedsludgewithflocculatedwithpolyel2-10872.TGAFITR199927938403.R.Font,A.Fullana,J.A.Conesa,F.Llavador.AnalysisofthepyrolysisandcombustionofdifferentsewagesludgebyTG.Journa4.XiaogeChen,S.Jeyaseelan,N.Graham.Physicalandchemicalpropertiesoftheactivatedcarbonmadefromsewagesludge.WasteManagement.2002,vol(22),755-760.5.F.Rozada,L.F.Calvo,A.I.Garcia.Dyeadsorptionbysewagesludge-basedactivatedcarbonsinbatchandfixed-bedsystems.BioresourseTechnology.2003,vol.6.XiaogeChen,S.Jeyaseelan.Studyofsewagesludgepyrolysismechanismandmathematicalmodeling.JournalofEnvironmentalEngineering,July2001,585-5917.Conesa,J.A.,Marcilla,A.,Prats,D.,andRodriguez-Pastor,M.(1997).Kineticstudyofthepyrolysisofsewagesludge.WasteMgmt.ANDRes.London,15(3),293-3058.Dumplemann,R.,Richarz,W.,andStammbach,M.R.(1991).KineticstudiesofthesewagesludgebyTGAandcomparisonwithfluidizedbeds.Can.J.Chem.Engrg.,69,959.2000104/T21.522.022.523.023.524.024.5ln[(dα/dt)/f(α)]-.50.0.51.01.5ln[(dα/dt)/f(α)]2.02.53.0-.50.0.51.01.52.02.53.0n=0.5n=0.25n=0.2n=1.0n=2.04DTG104/T18.018.519.019.520.020.521.0ln[(dα/dt)/f(α)]0.0.51.01.52.0ln[(da/dt)/f(a)]2.50.0.51.01.52.02.5n=0.5n=0.25n=0.2n=1.0n=2.05DTG-4-中国科技论文在线____________________________________________________________________________(1996).KineticsofbThermogravimetricandsealedreactorstudies.Int.J.Chem.Technol.,3,-5-中国科技论文在线____________________________________________________________________________