182Vol18,No220026ChemicalReactionEngineeringandTechnologyJun,2002:2001-07-30;:2001-12-28:(1968-),,,:(59836210):1001-7631(2002)02-0152-061,2,2,2(1.,110034;2.,310027):,()()(),,R2TMRTMRT,MRTMRT:;;:TH701:A1,,MRT(meanresidualtime)RTD(residualtimedistri2bution)[1],;,()MRT,MRT,MRT22.11,9,2000mm,300mm954,36,0.510römin71Fig1Simulatingrotarykilnexperimentalequipment12;42;72;10222;52;82;11232;62;92;2Fig2Viewoflongitudinalprofileofsimulatedrotarykilnwithinternalfins12;22;32,8,,22.2,()()()2.2.1PVC,11Table1Experimentmaterialcharacteristicsökgm-3ökgm-3ömm92.9371.5646.052530104.5691.730303278.71020.010530PVC209.01557.1510302225777.6:49185%,17.04%33.11%2.2.3(,),(),,,,,,,MRTMRTMRT=1nni=1ti(1)tii,nMRT,R2T35121R2TR2T=1nni=0(ti-MRT)2(3)3[25],MRT;,MRT,MRT,2Table2Materialscharacteristicsofreposeandfrictioncoefficientsofkiln’sinsidewallwithdifferentcoarsedegreeHsHd42.1948.860.5651.2511.32035.8147.280.5250.9020.94124.9051.930.5631.9302.33135.9052.900.4210.9411.102PVC27.3141.960.4710.5590.67743.1748.480.4801.0031.251:Hs;Hd22,HdHs,12.3%108.6%Hd(Hd3römin,),HsHd,,,HdHs(12.3%)(34.8%108.6%),4(MSW)3MSW5,45,[69],,,,,MRT,,,,MRT45120023MSWFig3ResidencetimedistributionofMSWinrotarykiln4MRTFig4TheimpactofrotationalspeedandslopeangeltoMRT5R2TFig5TheimpactofrotativevelocityandslopeangeltoR2T,,R2T,,R2T,,MRT,66(dam),30mm(10%)MSWMRT78.74%50mm(16.7%),MRT166.13%MRTMRT:6MRTFig6TheimpactofoutletdamtoMRT,;,,MRT,,MRT50mmMRT30mmMRT1,MRTMRT,7(rib,,narrow20mm,borad40mmL)MRT,MRT,551218(7MRTFig7TheimpactofLongitudinalribsdamtoMRT(L=540mm,slopeangel=1.8138MRTFig8TheimpactofinternalstructurestyletoMRT(L=2000mm,slopeangel=2.401),7,,4n420mm,4b450mm)MSWMRTMRT,,MRTMRT;,,,MRT,,79MRTFig9TheimpactofinsidewalltoMRT,,,MRT,,,,,MRT,,,MRT9,0.480,MSW,MRT;1.003,MSW,MRT,1.251,MRT8,,R2T,MRT,,MRT,MRT,MRT,6512002MRT,MRTMRT,,,MRT,,,,MRT,,,MRT:[1]AbouzeidAZM,FuerstenauDW.AStudyoftheHold-upinRotaryDrumswithDischargeEndConstrictions[J],PowderTechnology,1980,25:21291[2]CaoWF,LangrishTAG.Comparisonofresidencetimemodelsforcascadingrotarydryers[J],DryingTechnol-ogy,1999,17(4):825836.[3]SpurlingRJ,DavidsonJF,ScottDM.Theno2flowproblemforgranularmaterialinrotatingkilnsanddishgranulators[J],Chem.Eng.Sci,2000,55:23032313.[4]ChatterjeeA,SatheAV,SrivastavaMP,etal,FlowofMaterialsinRotaryKilnsUsedforSpongeIronManufacture:PartÉ.EffectofsomeOperationalVariables[J],MetallurgicalTransactionsB,1983,14:375381.[5]ChatterjeeA,SatheAV,MukhopadyayPK.FlowofMaterialsinRotaryKilnsUsedforSpongeIronManufacture:PartÊ.EffectofKilnGeometry[J],MetallurgicalTransactionsB,1983,14:383399.[6]AbouzeidAZM,MikaTS,SastryKV,etal.TheInfluenceofOperatingVariablesontheResidenceTimeDistributionforMaterialTransportinaContinuousRotaryDrum[J],PowderTechnology,1974,10:273288.[7]WesGWJ,DrinkenburgAAH,StemerdingS.SolidsMixingandResidenceTimeDistributioninaHorizontalRotaryDrumReactor[J],PowderTechnology,1976,13:177184.[8]YangWC.DynamicsofSimulatedMunicipalSolidWasteinaRotaringDevice[J],PowderTechnology,1992,72:139147.[9]WoodleGR,MunroJM.ParticleMotionandMixinginaRotaryKiln[J],PowderTechnology,1993,76:241245.ExperimentalResearchonMeanResidenceTimeofSolidMaterialsinRotaryKilnLIAi2min1,LIShui2qing2,YANJian2hua2,CENKe2fa2(11ShenyangAeronauticalEngineeringInstitute,Shenyang110034,China;21InstituteforThermalPowerEngineering,ZhejiangUniversity,Hangzhou310027,China)Abstract:Theexperimentswerecanidoutinacoolsimulatedrotarykiln.Byintroducingtracers,westudiedtheimpactofmanyfactors,suchasthecharacteristicsofsolidmaterials(thecharacter2isticsofreposeinmajor),structurecharacteristics(wallscoarsedegree,lengthandinternalstruc2ture),andoperatingconditions(slopeangleandrotationalspeed).Thedistributionofresidencetimeofexperimentmaterialsissimilartonormaldistribution.IncreasingtherotationalspeedandslopeanglewillreduceMRTandR2T.Alongthelongitudinaldirectionsthematerialsmeanspeedisincreasing.TheimpactofoutletdamtoMRTisremarkably.Allkindofcompositionoflongitudi2nalribsandcircularringscanincreasetheMRT,butitsimpactsarefarsmallerthantheoutletdam.TheimpactofwallcoarsedegreetoMRTtakeseffectsbychangingthebedbehavior.Keywords:solidwaste;rotarykiln;meanresidencetime75121