Batch distillation in a column with a middle vessel

《Batch distillation in a column with a middle vessel》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、PergamonChemicalEngineeringScience,Vol.49.No.18.pp.3033-3051,15~94Copyright81994ElscvierScienceLtdPrintedinGreatBritain.Allrightsnacrvcdam%z509/V4S7.M+0.000009-2!509(94)EOO83-3BATCHDISTILLATIONINACOLUMNWITHAMIDDLEVESSELARTHURG.DAVIDYANandVALERIIN.KIVAKarpovPhysical

2、ChemicalResearchInstitute,10Obukha,Moscow103064,RussiaandGEORGEA.MESKIandMANFREDMORARI’ChemicalEngineering210-41,CaliforniaInstituteofTechnology,Pasadena,CA91125,U.S.A.(Firstreceived21June1993;accepted4March1994)Abstract-Thispaperexaminesanewtypeofabatchdistillatio

3、ncolumnwhichisbuiltupfromtwoseparationsectionsandavesselinbetween.Mixtureswithconstantrelativevolatilitiesareinvestigated.Oneofthemostimportantfeaturesofthenewcolumnisthatithasadditionalsteadystatesonbinaryedgesofthesimplexwhichdonotcorrespondtopure.components.Thes

4、esteadystatesaresaddleandunstablesingularpointsofadynamicsystemdescribingtheprocess.Existenceofadditionalsteadystates,theirdependenceonparametersandtheintroductionofonemoreparameterqaddmoreflexibilitytotheprocessandprovidenewopportunitiesforbatchdistillation.Forexa

5、mple,abinarymixturecanbeseparatedintopurecomponentsunderfinitereboilandrefluxratio.1.INTRODUCTIONthattheycoincidewiththoseinconventionaltypesofThispaperexaminesanewtypeofbatchdistillationbatchdistillation.column(Fig.I),whichisbuiltupfromtwoseparationThepresentworke

6、xtendstheresultsreportedinsectionsandamiddlevessel.Amixturetobesepar-aseriesofpapers(Davidyanetal.[6-87inwhichatedisloadedintothemiddlevesselandtheproductsananalyticalinvestigationofthemodelofacolumnaresimultaneouslywithdrawnfromthetopandthewithamiddlevesselwascarr

7、iedout.bottomofthecolumn.Thecolumnunderconsidera-tionisacombinationandgeneralizationoftwocon-2.BACKGROUNDventionaltypesofbatchcolumns:batchrectifierDifferentialequationsystemsdescribingconven-[Fig.2,(l)]andbatchstripper[Fig.2,(3)],andcanbetionalbatchseparation(Fig.

8、1)suchaseasilytransformedintoeachoneofthembysetting*=x-y(x)(simpledistillation)(1)oneoftheproductflowstozero.Columnsofthistypewerefirstproposedby