多產(chǎn)低碳烯烴變徑提升管數(shù)值模擬研究.pdf

1、中國石油大學(xué)（華東）碩士學(xué)位論文多產(chǎn)低碳烯烴變徑提升管數(shù)值模擬研究姓名：張歡申請學(xué)位級別：碩士專業(yè)：化學(xué)工藝指導(dǎo)教師：鈕根林趙輝20080501NumericalSimulationoftheGas—solidT如儼phaseFlowinTM咿D(zhuǎn)iameterchangingReacto體ZHANGHuan(Chemical1℃chn0109y)DirectedbyProfessorNIUGenlinAbstractFluidizedb

2、edtechn0109ywaswidelyencounteredinpetro—chemical，energyandmetallurgyinduStry硒serreactorh2LsbecomeoneofthemostordinaryusedequipmentinsolidcatalyticprocessbecauseofthegreatsuccessofFluidCatalyticCracbngprocessEnhancedpropy

3、leneproductionthroughcatalyticpyr01ysisofheaVyoilhasbecomeapromisingtechnologytopromoteeconomicperf0加anceofente印riseW11ile，i徹oVationsshouldbeintroducedtoarchiveK曲catalystoilratioandappropriateresidencetimesimultaneously，

4、riserreactorwithchan百ng—di鋤etercouldbeaprobablesolutionIdealriserreactorforthuspu叩oseshouldbemadeupofseVeralsections而tlldifrerentdiameterN啪ericalsimulationsbasedoncomputationalfluid—dyn鋤ic(CFD)techniquehaVebeenperfb咖edto

5、inVestigatethehydrodyn鋤icsofgassolidtwophaSeflowmabenchscaleexperimentCommercialcodeFLUENTwasusedintheresearcha11dasuitablemodelwaSdevelopedFlowpattemofthegassolidtwophasenowinaIlindustryscalereactora】sohaSbeensimulatedE

6、ffectofdi丘erentnozzlecon69urationaIlditsinnuenceoncatalystdistributioninreactorwereinVestigatedanddiscussedExperimentalmeasurementonbenchscaleequipmentindicatesthattheVoJume行actionofthecatalystinthelargerdi鋤etersectionof

7、theriserw2Lsmuchhighercomp撕ngwiththetraditional^ser，sothecatalystaggregatingshouldhaVemoreeVidencetoinnuencewholenowpattemImproVeddragmodelbasedonEMMS(Energy—MinimizationMulti—scale)modelshouldhavebetterabi】itytopredictt

8、hedensesolidnowbehaviorintheriserConstantsolidreserVewaskeepbysettingsolidinletVelocityaccordingtothesolidoutletfluxKineticTheoryforGranularFlow(KTGF)modelwasusedforsolidphaseAValueofO85wasusedforpaIrticlerestitutioncoe銜

9、cientinthesimulationItwasnoticedthat，CFDsimulationsresultsbasicallyagreewellwiththemeasuredexperimentalmeasurements3DCFDsimulationgaVebetterprecisionthan2Dcasesduetothemoreaccuratedescriptionofrealequipmentin3Dsimulation