一種連續(xù)式氣調(diào)包裝工藝及其氣體置換裝置的研究.pdf

1、江南大學(xué)碩士學(xué)位論文一種連續(xù)式氣調(diào)包裝工藝及其氣體置換裝置的研究姓名：劉琳申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：包裝工程指導(dǎo)教師：盧立新20090801AbstractAbstractModifiedatmospherepackaging(MAP)isanew讎shkeepingpackagewhichisdevelopedfromthevacuumpackingandfillinginnitrogenpackageTheenvironmentint

2、hetraysorbagsischangedtoslowdownmetabolismandextendtheshelflifeofproduetSItismostimportantforthefiuitmodifiedatmospherepackagetoensurethatthegascomponentintheoriginalpackageishigllaccuracyCurrentlytheexistingbasicpackagi

3、ngmethodofMAPisbagortrayThemainlygasreplacementtypescontaingasflushingandvacuumfillingreplacementThegasreplacementdeviceisthekeypartsofthemodifiedatmospherepackagingmachineItspropertydirectlyaffectsOllthequalityofgasdisp

4、lacementgasreplacementrateandtheconsumptionofthedisplacementgasAlso，itdirectlydeterminesthequalityoftheproductpackageUptonowithasbeenmanufacturedmanykindsofgasreplacementstructuresathomeandabroadButitisshortoftheoretical

5、analysisandtechniqueintheoptimizationdesignofthegasreplacementdevicetoimprovethepropertiesofthemachineThegasreplacementrateisthekeyindicatorstoevaluatethequalityinthepackagecontainerduringtheMAPprocessItisalleffectivelym

6、odetooptimizethegasreplacementstructurebyusingthenumericalsimulationThispapermakesuseofcomputationfluidmechanicsGasreplacementdeviceisoneofthekeytechnologydevicesinMAPmachineAphysicalmodelisestablishedinordertoanalyzegas

7、flushingandvacuumfillingreplacementprocessdependingonthegasreplacementmechanismThegasflushingreplacementiscommonlyusedinthetypeoftraysgasreplacementAccordingtotheexistingporestructureinMAPmachine，thenumericalsimulationis

8、usedtoanalysisthegasflowfield，atthedifferentjetinjectionanglesEffectofthejetinjectionanglesandfillingpressureonthegasreplacementrateWasanalyzedThevacuumfillinggasreplacementCanreachthehi曲accuracygasreplacementratebutthec

9、ycleofpackageisrelativelylongThecontinuousMAPmachinewhichisdesignedbyusisthephysicalmodeltoestablishthethreedimensionalgasflowfieldThemodelscomparetheeffectofgasreplacementpropertiesforthefactorofthreedifferentpumpingstr

10、uctures，therangeofpressureandfruitsEspeciallythechangeofgascomponentprocessisemphasizedtoanalysisAccordingtotheresultofnumericalsimulationthejetinjectionanglesareoptimizedfortheexistinggasflushingdevicetoimprovetheaccura

11、cyofgasreplacementTheoptimalparametercailbeacquiredforthevacuumfillingdevicedesignedbyusItCansupplyatheoreticaldirectionforthecontinuous，precisionandquickpackagetechnologyAdesignproposalispredestinedforittoensureaccuracy