分离工程(separation engineering)

分离工程(separation engineering)

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时间:2018-07-20

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1、分离工程(Separationengineering)The1.equilibriumseparationprocessisthetransportofthematerialintheheterogeneousphase.Itistheadditionofanenergyseparationagentandamaterialseparationagenttotheformationofthesecondphaseintheoperation.For2.pairsofmulticomponentsystems,itisnecessarytoseparate

2、Cpureproductswithonecomponent,requiring(C-1)towers,andthenumberofprocessesrequiredforthetowertobecomposedof(S={2(n-1))!/n!(n-1)!}3.withtheincreaseofthevaporpressuredifferenceofthepurecomponent,thelowestazeotropemovestowardtheconcentrationdirectionofthecomponentcontaining(lowboili

3、ngpoint),whilethemostGaoHengboilingpointmovestowardtheconcentrationdirectionofthe(GaoFeidian)component.Intheprocessofchangingtheconcentrationfrom0to1,therelativevolatility(fromlessthan1,equalto1,greaterthan1continuouschange)oftheazeotropeformedby4.negativedeviationsolutionvariesw

4、iththeconcentration.5.thereareusuallyseveralregenerationmethodsusedinindustry:(loweringpressure,raisingtemperature,ventilationpurging,displacementdesorption)6.accordingtotheadsorptionforcebetweenadsorbentsurfaceandadsorbate,adsorptioncanbedividedinto(physicaladsorptionandchemical

5、adsorption).7.theseparationprocesscanbedividedintotheadsorptionofsoluteandtheadsorptionofconcentratedsolutioninthedilutesolution.8.nonadiabaticabsorptionprocess,therearewaystoderiveheat(intermediateheatconduction,internalheatconduction,circulatingheatconduction).9.reverseosmosism

6、embraneseparationprocessgenerallyuses(asymmetricmembrane),itsrawmaterialis(celluloseacetateanddirectionofpolyamide),therejectionis(solute,salt).10.liquidfilmhastwotypes,emulsionliquidmembraneandsupportedliquidmembrane.11.thesupercriticalfluidextractionprocesscanbedividedintotwoty

7、pes(isothermalvariablepressureprocessandisobaricvariabletemperatureprocess)byusingthecharacteristicsofthecontinuouschangeofthesolubilityofSCFwiththechangeoftemperatureorpressure12.theseparationprocesscanbedividedintotwocategories:mechanicalseparationandmasstransferseparation,whic

8、hcanbedividedintoequilibriumseparationpr

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