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FiltrationandSeparationFiltrationandSeparationSpreadsheetfiles

ClickherefortheErratapageforthebookUP-DATEDNovember2000Manyofthespreadsheetroutineshavebeenfollowedbyanewsitenow,providinginter-activeuserdatainputandrealtimefiltrationandsedimentationmodelling/simulation.Anexpertsystemforfilterselectionisalsoavailable.Hereisthelinktotakeyouto:Filtration-and-Separation.comfortheseutilities.TheoriginalspreadsheetswerewrittenbeforeWindows'95andusedBoorland-laterCorel-QuattroProv5.TheoriginalfilesarestillavailablebelowbutIthinkmostwillwishtodownloadthenewerExcel'97versions.Thusthispageisstructuredasfollows:apdffilethatdescribessomeusesforthefiles,theExcelfilesinziparchiveformatandthentheoriginalQuattroProfiles.AllthefileshavebeenrevisedforcompatibilitywiththeforthcomingsecondeditionofthebookSolid-LiquidFiltrationandSeparationTechnology,VCH,byAlbertRushton,TonyWardandmyself.Thebookwillbeoutinlate1999andfulldetailsofthebasisforthesimulationsandhowtousethemareinit.Regardingcomputerviruses,youmayliketoknowthatNONEofthesefileshavemacrosinthem.

fs.pdf(527k)ThisisapapergivingdetailsofthefilesinAcrobatformat,it'sbigbutcontainslotsofusefuldetailsonwhattolookfor.

TheExcel'97files:filtration.zip(88k)Allthefiltrationfileszippeduptogether-seebelowforadescriptionofthefiles.batchsed.zip(489k)Afinitedifferencesolutiontocompressiblesedimentation-seebelowforfullerdescription.

TheoriginalQuattroProfiles,andfullerdescriptionofthefilesincludedandup-datedintheExcel'97downloadsgivenabove:Specific.zip(8k):specificsurfaceareaperunitvolumecalculatedfromaparticlesizedistribution,withfiltercakepermeabilityfromKozeny-Carmanpermeabilityandthenspecificresistancetofiltration;seereference1.ConPress.zip(7k):aspreadsheettocalculatespecificandmedium

resistancesfromconstantpressurefiltrationdata;seereference1.Exponent.zip(9k):givenasetofdataforspecificresistanceandcakemoistureratiovaryingwithcakeformingpressurethiswillcalculatetheexponentsandconstantsinthesimpleLewispowerlawmodel;seereference1.RVF.zip(8k):toinvestigateoperatingconditionsonrotaryvacuumfilterthroughput,assumingincompressiblecakefiltration;seereference1and2.PLFcost.zip(7k):anexampleofhowfiltrationdatacanbeusedto

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optimisefiltrationcycletimeandcostevaluationforaPlateLeafFilter;seereference1.ConRate.zip(15k):constantratefiltrationofacompressiblefiltercake-whichdoesnotgiveaconstantfiltrationratebecauseofcompressioneffects;seereference1.Filter.zip(38k):Ilikethisone!Itsimulatesconstantpressurefiltrationofacompressiblefiltercakeandillustratesthepointthatthepressureformingthecakewillvaryasthecakebuildsup.Lotsofgraphstoillustratetheeffectsofthischange,anditillustratesthepitfallsthatmightoccurwithshortfiltrationcycletimes.TheExcelfiledidsomethingfunnyonconversion-IappeartohavelostthesecondaryYaxisonthegraphs.I'dbehappytoreceiveasortedoutExcelfilefromsomeone.Furtherdetailscanbefoundinreference1and3.Profile.zip(14k):thisusesthesamesolutiontechniqueastheabovefilebutprovidesinformationonthelocalsolidconcentrationprofilewithinthefiltercake.Liketheabovefile,itusesthetheoriesofTillerandShirato;seereference1and3.Sediment.zip(109k):thisisacomplicatedfile.ItisaFiniteDifferencesolutiontothebatchsettlingofacompressiblesediment.Thebestwaytoseeitworkistochangethevalueintheinitiatorcellto0andpress

functionkey9(F9).Thiswillrepresentauniformconcentrationwithinthebatchvessel.Thenenter1intheinitiatorcellandkeeppressingF9;alsokeepaneyeontheinsertedgraphnexttothecell.Youshouldseetheinterfacecurveconvergetoasolution.IhaveonlyincludedtheQuattrofileasIhadproblemsconvertingitintoExcel,itusesseveralpagesinanotebook.Fordetailsofthesolutionmethodseereference4.Ihopetoaddsomeinstructionsonitsusesoon,butyoushouldhavefunplayingwithit.Pleaseletmeknowyourthoughtsonit,andwaystosimplifyit!

Youmayalsofindthefollowingreferencesusefulininterpretinghowthespreadsheetsweresetupandhowtousethem.1.A.Rushton,A.S.WardandR.G.Holdich,Solid-LiquidFiltrationandSeparationTechnology,1996,VCH,Weinheim,Germany.2.R.G.Holdich,1990,RotaryVacuumFilterScale-upCalculations-andtheuseofComputerSpreadsheets,FiltrationandSeparation,27,pp435-439.3.R.G.Holdich,1994,SimulationofCompressibleCakeFiltration,FiltrationandSeparation,31,pp825-829.4.R.G.HoldichandG.Butt,1997,SeparationScienceandTechnology,32,pp2129-2151.Morefilesmayfollow,suggestionspleaseforSolid-Liquidseparationtopicsto

tackleinthisway,andcommentsontheabovefreebieswouldbewelcomed.Pleasee-mailmewithyoursuggestions.Clickheretogobacktomyhomepage.