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1、ChemicalEngineeringScience66(2011)5064–5076ContentslistsavailableatScienceDirectChemicalEngineeringSciencejournalhomepage:www.elsevier.com/locate/cesEffectsofparticlepropertieson?owstructureina2-Dcirculating?uidizedbed:Solidsconcentrationdistributionand?owde
2、velopmentnJingXu,JesseZhuParticleTechnologyResearchCentre,DepartmentofChemical&BiochemicalEngineering,TheUniversityofWesternOntario,London,Ontario,CanadaN6A5B9articleinfoabstractArticlehistory:Theeffectsofparticleproperties(particledensity,sizeandsphericity)
3、onsolidsconcentrationina2-DReceived14January2011riserwerecomprehensivelyinvestigatedbymeasuringtheaxialandlateralsolidsconcentrationwithReceivedinrevisedformanoptical?berprobe.Inthisstudy,solidsconcentrationofdifferenttypesofparticlesshowsthat17June2011heavi
4、erparticleshavehighersolidsconcentrationlaterallyandaxiallythanlighterparticles;largerAccepted28June2011particlesresultinmorecompactsolidsdistributionandsuchsizeeffectismoreevidentattheriserAvailableonline23July2011bottom;moresphericalparticlesleadtohigherso
5、lidsconcentration.VariousforcesactingonparticlesKeywords:andthechangeintheslipvelocitybetweengasandparticleswereusedtoexplaintheeffectsofparticleFluidizationpropertiesonsolidsdistribution.Hydrodynamics&2011ElsevierLtd.Allrightsreserved.2-DCFBSolidsconcentrat
6、ionParticlepropertiesOptical?berprobe1.IntroductionoperationoftheindustrialCFBreactors(MastelloneandArena,1999).TheexperimentsconductedbyBaietal.(1992)showedaxialCirculating?uidizedbed(CFB)reactorshavebeenusedforawidevoidagepro?lesofparticleswithdifferentsiz
7、eanddensitybyrangeofindustrialapplicationsoverthepast50years.Hydrody-employingpressuregradienttransducers.Theresultsindicatedthatnamicsofgas–solidtwo-phase?owinCFBsystemsoftenaffectthethedifferenceinvoidagedistributionbetweendifferentparticlesizesmasstransfe
8、r,heattransfer,gasandsolidsmixingaswellasthebecomessmallerwithhighergas?owrateandlowersolidscircula-chemicalreaction.Theaxialandradialsolidsdistributionsrepresent-tionrate,andthatheavierparticle
