城市污水污泥的热解特性

ISSN100020054CN1122223öN()JTsinghuaUniv(Sci&Tech),200141102001,Vol.41,No.1025ö3390292,,,(,100084):2000208218:(19762),(),,:,(TGA)(DSC):3,2,33,:;;:X705:100020054(2001)1020090203:APyrolysispropertiesofmunicipalsewagesludgeFENGHua,ZHANGYanguo,QIUTian,WUZhansong(DepartmentofThermalEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Thermogravimetricanalyses(TGA)anddifferencescanningcalorimeter(DSC)wereusedtostudythecombustioncharacteristicsofdriedsludgefromtheBeijingGaobeidianSewageTreatmentPlant.Theresultshowedtherearethreetemperaturerangesduringthesludgecombustion,inwhichthesludgequicklylostweight.Thefirsttwoareduetoreleaseofthevolatiles,whilethefixedcarboniscombustedinthethirdrange.Thekineticsparametersforthechemicalreactionswerecalculatedandthesludgecombustionmechanismisdiscussed.Somesuggestionsaregivenforthedesignofsludgefluidizedbedincinerators.Keywords:sewagesludge;combustion;thermalanalysis,44743,,0.3%5%(97%)[1],,,,,,,[2],,,,,,,,,,,,SO2NOx,,11.1,(100w)81.62100w33.08,58.768.16;100w37.79,4.65,3.911.6912610.5kJökg,,,,,1.2(TGADSC)[3]120ömin40öminDSC2DTG100mLöminDSC1mg($U),DTGA,40ömin20ömin,,1DTG(A)DTG,,,,,,1DSC-DTG,2,,,TGA,,,,,,,,DTG1DSC($U),3,,,,,,2,DTG,DTG,CoatsRedfern[3]TGA,,,,dAödt=kf(A)=Aexp(-EöRT)f(A),(1):A,(1173K);k,min-1;A,min-1;E,kJömol;T,K;f(A)=(1-A)n,,n(1),150360n=1,360485n=1660735,n12,660735n=1[4]232Y[3]19,:,,121HöB=20öminEkJõmol-1Amin-1B=40öminEkJõmol-1Amin-115036036.79222.9031.63137.4036048522.8413.1023.4327.5066073565.632129.0753.74739.943F(A)=A0dAf(A),n,:(150360),F1(A)=-ln(1-A);(360485),F2(A)=-ln(1-A);(660735),F3(A)=-ln(1-A),,,,[3],660735,,,,[4],,,485660,,,,,4,;3,2,3485660,,,,(References)[1],,.[J].,1999,16(1):13.JIANGChengai,HUANGGuofeng,WUQitang.Advanceofmunicipalsewagesludgetreatmentandutilization[J].Agro2environmentandDevelopment,1999,16(1):13.(inChinese)[2],,.[J].,1999,21(1).HULong,HEPingjin,SHAOLiming.Technologyandapplicationanalysisofthermaldryingtreatmentformunicipalsewagesludge[J].ChongqingEnvironmentalScience,1999,21(1).(inChinese)[3],.[M].:,1985.CHENGJinghong,LIChuanru.MethodsandApplicationsofThermalAnalysis[M].Beijing:SciencePress,1985.(inChinese)[4],.[M].:,1989.QUZuojia,ZHANGZhenduo.FundamentalofCombustion[M].Beijing:NationalDefenceIndustryPress,1989.(inChinese)29()2001,41(10)