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571Vol157No1120061JournalofChemicalIndustryandEngineering(China)January2006,,,,,,(,,310027):;PE;;:TK6:A:0438-1157(2006)01-0146-05FluidizedbedgasificationofPEplasticinmunicipalsolidwasteXIAOGang,CHIYong,NIMingjiang,MIAOQi,ZHUWenli,JINYuqi,CENKefa(StateKeyLaboratoryofCleanEnergyUtilization,InstituteofMechanicalandEnergyEngineering,ZhejiangUniversity,Hangzhou310027,Zhejiang,China)Abstract:Inordertodevelopmunicipalsolidwaste(MSW)gasificationandmeltingtechnologywithlowemissionandhighefficiencyfordevelopingcountries,theoptimumconditionsofployethyleneplasticgasificationwerestudied.Polyethylene(PE)plasticwidelyexistinginMSWwasgasifiedinafluidizedbed1ThestudywasfocusedonthecharacteristicsofPEgasificationatdifferentexcessairratios(EAR)(012018)andtemperatures(400700).Thehighestgasificationefficiencyreached72%intheaboveexperimentswhentemperaturewas700andEARwas012,andthelowheatingvalue(LHV)ofproductgaswasupto10000kJm-3,theyieldwas311m3kg-1andtheconversionefficiencyofCwas80%.TheconversionefficiencyofCcouldbeincreaseduptoabout100%iftemperaturewasmaintainedat700andEARwasover014(ortemperatureat600,andEARover018).ThenthereactionprocessandmechanismofPEgasificationwereproposedbyanalyzingthecharacteristicsofproductgas.Keywords:municipalsolidwaste(MSW);PEplastic;fluidizedbed;gasification2005-05-31,2005-07-24.:.:(1979),,.,,Thermoselect[1,2]Siemens[1,3][4]RCP[1].550650,,.,.8%20%,1.PE50%,43000kJkg-1,PE.Receiveddate:2005-05-31.Correspondingauthor:Prof.CHIYong.E-mail:chiyong@zju1edu1cn,[6]PE,[7]PE,[8].,Faravelli[9]PE,Brebu[10]PE,Predel[11]PE,Marcilla[12]PE,Mastral[13]PE.,,.Table1TypicalMSWcharacteristicsofsomecitiesinChina/%CityPaperWoodTextilePlasticKitchengarbageMetalsGlassOthersBeijingYanshan[5]51435175219710137511831100514317122ShanghaiQingpu4158111608159815962109018921887108GuangdongDongguan61447183191281912831121611031371102Table2Proximateandultimateanalysisoffeedstock/%(mass)MadAadVadFCadQb,ad/kJkg-1CadHadNadSadOad010201159918346362851831413801160107Notdetected.,,400700012018,PE,.1111()PE,3mm,600kgm-3,9600kgm-3,2.1121,560mm30mm150mm,Fig11Fluidizedbedgasifier1fan;2flowmeter;3gasmeter;4buffer;5fluidizedbedgasifier;6temperaturecontrollerandheater;7coolingpipe;8feeder;9syngascollector;10filter;11gasbag;12vacuum2fan,0130mm,60mm,,0135ms-1().,,,(EAR)3.,.Table3RelationshipofEARandspeedoffeedingEARSpeedoffeeding/gmin-101261570143129016211901811642211PE,15min-1,2.PE400,520,460.Fig12ThermogravimetricanalysisofPE212,PE7411:,,,PE.21211PE,C,36.[(kJ)/(kJ)]100%.[(m3)/(kg)]100%.[C(mol)/C(mol)]100%.Fig13LHVofPEsyngasfromgasifieratdifferentEARandtemperaturesFig14GasificationefficiencyofPEatdifferentEARandtemperatures600,PE.400012014,,;016018500,,,,,Predel[11].600,,Fig15YieldofPEgasificationatdifferentEARandtemperaturesFig16ConversionefficiencyofCatdifferentEARandtemperatures,.,,3:N2,;,PE,;,.400500,;600700,PE,,,,.,.4,400500,;600700,.,.CPE.6,,[8].84157700014(600018),PE.21212PE,,(N2),710.Fig17PercentofcomponentsinsnygasatdifferentEARwhentemperaturewas400Fig18PercentofcomponentsinsnygasatdifferentEARwhentemperaturewas500Fig19PercentofcomponentsinsnygasatdifferentEARwhentemperaturewas600Fig110PercentofcomponentsinsnygasatdifferentEARwhentemperaturewas700[613],PEPE().400500,PE,,(100150),(10-810-7m),()H2[7,10,11],.,PE.600700,PE,,H2CH4C2H4,CO2COH2O.,PE.400,016018,,,H2(,O210%13%),H2500700H2.500,,,,H2,.H2,1,CO2H2O,COH2C2H4.,PE,,CO2.600700,PE,PE,.,CO9411:H2CH4C2H4,CO2500,H2,O2,CO,CO2500.3(1)600,PE;700012,,10000kJm-3,72%,311m3kg-1,C80%.(2)700014(600018),C100%,PE.(3),,700,012014.ACEARFCLHV,kJkg-1MQ,kJkg-1VadbReferences[1]TomasMalkow1NovelandinnovativepyrolysisandgasificationtechnologiesforenergyefficientandenvironmentallysoundMSWdisposal.WasteManagement,2004(24):53279[2]BerndCalaminus,StahlbergR.Continuousin2linegasification/vitrificationprocessforthermalwastetreatment:Processtechnologyandcurrentstatusofprojects.WasteManagement,1998(18):5472556[3]KawaiY,TaguchiA.Pyrolysisgasmeltingsystem//Jong2InDong,Sung2KeunBae,Soo2KooLee.Proceedingofthe1stICIPEC.Seoul:TheUniversityofSeoulPress,2000:1272137[4]TomioSuzuki,MasamitsuTakahashi1Developmentoffluidizedbedgasificationandswirl2flowmeltingprocessformunicipalsolidwaste//Jong2InDong,Sang2MinChoi.Proceedingofthe2ndICIPEC.Seoul:TheUniversityofSeoulPress,2002:1210[5]HuangHailin().Characteristicanalysisofdomesticwasteinyanshanarea1EnvironmentalSanitationEngineering(),2003,11(3):1502151[6]LiAimin(),LiXiaodong(),LiShuiqing(),YanJianhua(),CenKefa().Experimentonmanufacturemedium2heatingvaluefuelgasbypyrolyzingmunicipalrefuseinarotarykiln1JournalofChemicalIndustryandEngineering(China)(),1999,50(1):1012107[7]JiXing(),LiuYirong(),QianJialin(),WangJianqiu().Thepyrolysiskineticsofhighdensitypolyethylene(PE)bysequentialpyrolysisgaschromatography.ChinaEnvironmentalScience(),1999,19(4):3012305[8]XiaoRui(),DongChangqing(),JinBaosheng(),ZhangMingyao().Experimentalstudyonairgasificationofpolypropylene.JournalofCombustionScienceandTechnology(),2003,9(4):3482352[9]FaravelliT,BozzanoG,ScassaC,PeregoM,FabiniS,RanziE,DenteM.Gasproductdistrib