膜蒸餾組件設計及過程模擬計算.pdf

1、天津大學碩士學位論文膜蒸餾組件設計及過程模擬計算姓名：乞炳蔚申請學位級別：碩士專業(yè)：化學工程指導教師：李保安20090801ABSTRACTMembranedistillation(MD)isanewtypeofpurificationtechnologydevelopedin1980’SlastcenturywhichisanewprocessofthemembranetechnologYcombinedwiththetraditio

2、nalevaporationprocessBasedontheequilibriumbetweenthevaporandtheliquid，phasechangeofmembranedistillationdependsOnthelatentheatoftheevaporation，SOdoesthetraditionaloneVacuummembra【nedistillation(VMD)isoneofthefourconfigura

3、tionsofMD，whichhassomecha托l(wèi)cteristicssuchashighwaterproduction，goodseparationcoefficients，simpledevicesandeasytooperateandrealizeVMDcanbewidelyusedinseveralfields，suchasremovalofthevolatileconstitutionsanddesalinationoft

4、heseawaterandthebitterNowourcountryadvocatesbuildingtheharmonioussociety，itismeaningfultodevelopandusethemembranedistillationtechnologytorealizethedesalinationofseawater，energy。savingandemission—reductionandcomprehensive

5、utilizationofwastewaterBasedontheconclusionofthelatestreferenceinthisfield，astothecorepartoftheMDtechnologymembrane、module，weputforwardthemeasuretomakethedistributionoftheliquidinthemembranemodulemoreuniform，andfinallvto

6、promotethewaterproductionThispapertakeCFDmethodcombinedwithexperlmenttoprovethattheimprovementofthemembranemodulehaspositiveinfluenceonraisingthewaterproductionAccordingtothereference，wefindanewmethodforcalculationofwate

7、rproductionComparedwiththeexperimentdatathedataobtainedbycalculationcomplywiththedatabyexperimentinawiderangeoperatingconditionsThisnewcalculationmethodhelpstoraisemeasurestopromotethemassandheatnansf：brprocessindifferen

8、tconditionsAstheanalysisshows：whenthevelocityvariesfrom90cm／min100cm／minthedatafromcalculationdeviatesmorecomparedwiththevelocityofmorethan100cm／minBecauseinlowervelocityliquidinthemembranemoduledosenotreachabalancestatu