基于循环载氧体的生物质串行流化床燃烧机理研究

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1、东南大学硕士学位论文基于循环载氧体的生物质串行流化床燃烧机理研究姓名：王雷申请学位级别：硕士专业：热能动力工程指导教师：沈来宏20090301ABSTRACTC02istheprimarygreenhousegasthataffectstheclimateoftheearth．FossilfuelconsumptionisthemajorsourceofanthropogenicC02emission．Toachievesustainabilityinenergyandreducegreenhousegasemissions，

2、biomassisgettingincreasedattentionasapotentialenergysource．Biomasspossesseshighintrinsicvalueasasustainable，worldwidesourceofenergyinbothdevelopedanddevelopingregions．ItCallbeobtainedfromforests，agricultureandindustrialactivities，andplayallimportantroleinfindingnewa

3、lternativefuels．SincebiomassisrenewableandconsumesatmosphericC02duringitsgrowth，theutilizationofbiomassasanalternativeoffossilfuelscanhaveaC02zero．emission．Chemicalloopingcombustion(CLC)isthemostpromisingtechnologyusedtocombinefuelcombustionandpureC02productioninsit

4、utoallowC02sequestration．Itisindirectcombustionwherebyoxygen(fromair)istransferredbyasolidoxygencarriertofuelcombustion．IntheCLCprocess，tworeactors，allairreactorandafuelreactorareused．Oxygencarderiscirculatedbetweenfuelreactorandairreactor,andtransportingoxygenforfu

5、elcombustion．Oxygencarrierisfirstlyoxidizedbyairintheairreactortooxidizedoxygencarrier,andthenoxidizedoxygencarrierisreducedbyfuelinthefuelreactor．ThefluegasleavingfromtheairreactorismadeupofN2andunreacted02；thefluegasleavingfromthefuelreactoronlycontainsC02andH20．I

6、nthisway,thenitrogenfromtheairleavesthesystemfromtheairreactor,whereasthefluegasfromthefuelreactorconsistsofonlyC02andwater．Afterwatercondensation，almostpureC02canbeobtained，andthencompressedintoliquidforstorage．BiomassgasificationandbiomassChemical—loopingcombustio

7、nininterconnectedfluidizedbedsisproposedinthispaper．Todomoreresearch．amodelofbiomassCLCisbuildbyusingAspenPlus。InthepaperbiomassgasificationintheprocessofchemicalloopingcombustionofbiomassWasfirstlyinvestigatedininterconnectedfluidizedbeds。Itresemblesacirculatingflu

8、idizedbedwiththeextra，bubblingfluidizedbedafterthecyclone．Thecirculatingfluidizedbedisdesignedforcombustionfedwithair,thebubblingfluidized