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1、FluidizedbedForothertopicsonfluidization,seeFluidizedbedcombustion,FluidizedbedreactorandFluidization.Afluidizedbedisformedwhenaquantityofasolidparticulatesubstance(usuallypresentinaholdingvessel)isplacedunderappropriateconditionstocausethesolid/fluidmixturetobeha
2、veasafluid.Thisisusuallyachievedbytheintroductionofpressurizedfluidthroughtheparticulatemedium.Thisresultsinthemediumthenhavingmanypropertiesandcharacteristicsofnormalfluids;suchastheabilitytotree-flowundergravity,ortobepumpedusingfluidtypetechnologies.Theresultin
3、gphenomenoniscalledfluidization.Fluidizedbedsareusedforseveralpurposes,suchasfluidizedbedreactors(typesofchemicalreactors),fluidcatalyticcracking,fluidizedbedcombustion,heatormasstransferorinterfacemodification,suchasapplyingacoatingontosoliditems.Thistechniqueisa
4、lsobecomingmorecommoninAquaculturefortheproductionofshellfishinIntegratedMulti-TrophicAquaculturesystems/11Contents[hide]1Propertiesoffluidizedbods2Application3History4Fluidizedbedtypes5Beddesigno5.1Basicmodelo5.2GeldartGroupingso5.3Distributor6Seealso7References8
5、ExternallinksPropertiesoffluidizedbedsAfluidizedbedconsistsoffluid-solidmixturethatexhibitsfluid-likeproperties.Assuch,theuppersurfaceofthebedisrelativelyhorizontal,whichisanalogoustohydrostaticbehavior.Thebedcanbeconsideredtobeaninhomogeneousmixtureoffluidandsoli
6、dthatcanberepresentedbyasinglferebulkdensity.Furthermore,anobjectwithahigherdensitythanthebedwillsink,whereasanobjectwithalowerdensitythanthebedwillfloat,thusthebedcanbeconsideredtoexhibitthefluidbehaviorexpectedofArchimedes1principle.Asthe”density'；(actuallytheso
7、lidvolumefractionofthesuspension),ofthebedcanbealteredbychangingthefluidfraction,objectswithdifferentdensitiescomparativetothebedcan，byalteringeitherthefluidorsolidfraction,becausedtosinkorfloat.Influidizedbeds,thecontactofthesolidparticleswiththefluidizationmediu
8、m(agasoraliquid)isgreatlyenhancedwhencomparedtopackedbeds・Thisbehaviorinfluidizedcombustionbedsenablesgoodthermaltransportinsidethesystemandgoodheattran
