大顆粒流化床流化特性的研究.pdf

1、天津大學碩士學位論文大顆粒流化床流化特性的研究姓名：白書培申請學位級別：碩士專業(yè)：化學工程指導教師：康仕芳1999.4.1ABSTRACTThefluidizationbehaviourofcoarseparticleswasinvestigatedinatwo—stagerectangularfluidizedbed(115115mm)usingfourkindsofmaterials(10mm～60mm)whichhavediffe

2、rentsizeandclosedensitytoureaThedifferencesinfluidizationbehaviourduetoparticlesizewerepointedoutTheresidencetimedistribution(RTD)ofmaterialsweremeasuredindifferentoperationalconditions，theexperimentalresultsshowedthatth

3、oughincreasinggasveloeityleadedtoperfectmixing，aboveacertainvalue，themovementofsolidsWasdominatedbyoverallcirculationGoodmixingWaseasytoachievedatlowbedheight，whileathighbedheight(aspectrate15)，therewasatendencytosluggin

4、gAnarrowrangeofRTDWasgotintwostagefluidizedbedSolidsflowratehadlittleeffectonRTDinthisworkBasedontheestablishmentofsolidsflowmodel，astochasticapproachnamelyaMarkovchainwitlltransitionalandabsorbingstateshadbeenusedtosimu

5、latetheRTDthesimulatedvalueswereinrelativelyagreementwimexpedmentaldatanlesegregationofbinarysystemsandquaternarysystemswithcontinuoussizedistributionWastested，whenu212umncoarseparticleswererichinuppersiteofthebed；u=14u|