化工设备-旋流板式气液分离器的放大规律

35Vol.3No.5200310TheChineseJournalofProcessEngineeringOct.2003[(),102200]318()..TQ028.4A1009–606X(2003)05–0390–061[1,2].1.2([3])..αβ.αβ3.hLiquidoutletCylinderGasoutletExittubeSwirlvaneInletβα12Fig.1MistswirlseparatorFig.2Thestructureoftheswirlvane[4,5].2003–03–12,2003–05–06(:300023)(1962–),,,,,,E-mail:[e-mail].5391.23.36.–..,V–3/10LZB.QDF–6..MCompressorCompressorBlowerBlowerTankTankTankTankWaterpumpWaterpumpLiquidLiquidAtmosphereAtmosphereGasGasistseparatorMistseparatorFlowmeterFlowmeterFlowmeterFlowmeterManometerManometerDual-flownozzleDual–flownozzleManometerManometerFlowmeterFlowmeter3Fig.3Schematicdiagramofexperimentalapparatus..–.(U).19g/m3,30µm().33.1..43923456789101112131496.096.597.097.598.098.599.0D=340mm,α=40o,β=45oη(%)U(m/s).1D=340mm..3,.5~9m/s20m/s.4–Fig.4Influenceofsuperficialgasvelocityonseparationefficiency1D=340mmTable1OptimalsuperficialgasvelocityatD=340mm(m/s)ElevationαRadialangleβ20o30o40o40o45o50o9.0(10.7)9.5(14.4)9.0(15.6)8.5(17.5)7.5(16.7)Note:Valuesinbracketsarecalculatedvelocitythroughvanes.3.2.(1)2φ700mm55o..30o.2Table2Effectofelevationonseparationefficiencyandpressuredrop(U=6.36m/s)Elevationα20o30o40oSeparationefficiency(%)93.996.098.1Pressuredrop(Pa)7609901580(2)3φ700mm30o...50o~60o.3Table3Effectofradialangleonseparationefficiencyandpressuredrop(U=6.36m/s)Radialangleβ50o55o60oSeparationefficiency(%)94.696.099.0Pressuredrop(Pa)81099017005393(3)4φ700mm..4Table4Effectofvanenumberonseparationefficiencyandpressuredrop(U=6.36m/s)Vanenumber364045Separationefficiency(%)89.396.898.8Pressuredrop(Pa)3805606803.3.h(1).D=340mm5...5108~248mm(32%~73%D).50100150200250300949596979899η(%)h(mm)5Fig.5Changeofseparationefficiencywiththedistancebetweentheswirlvaneandtheexittube4.2kPa2kPa.3(∆Pi∆Pe)(∆Pplate)...6D=340mm5.()2ieplateieplate1(1).2PPPPuζζζρε∆=∆+∆+∆=+++(1)ζiζe.ζi0.DeD22e14.DD=(2)39430.375()[6]ζe6.0.6.0.56789101112130100020003000400050006000αβB40o45o2.5830o50o2.0630o45o1.9030o40o1.5220o45o1.22—∆P=Ku2∆P(Pa)U(m/s)0.40.60.81.01.210203040506070ζplateB1.037Ar-0.052D(mm)3404807001521906D=340mmFig.6ChangeofpressuredropwithsuperficialgasvelocityatD=340mm7Fig.7Dragcoefficientatdifferentswirlvanes.6.BζplateB.Ar=D3ρ2g/µ2plate(,),fBArζ=(3)31.0370.052plate2248.136.0,(1)PBAruζρε−∆==+−(4)7.(4)()1.0370.052216.048.13(1).2PBArρε−∆=++u(5)(5)5.(5).5Table5ComparisonbetweentestedpressuredropandpredictionbyEq.(5)FactoryD(mm)Temp.(oC)Massflowrate(kg/h)Test∆P(Pa)Prediction∆P(Pa)η(%)QiluAcrylonitrilefactoryAnqingbranch152019008682465439493111002032103120239695Note:P=20kPa,ε=0.0155.5(1)5~9m/s.5395(2)32%~73%D.(3).(4)()1.0370.052216.048.13(1)2PBArρε−++u∆=.Ar,Ar=D3ρ2g/µ2β(o)Bεg(m/s2)η(%)h(m)µ(Pa.s)Kρ(kg/m3)u(m/s)ζα(o)[1].[J].,1972,1(4):79–84.[2].[J].,1978,7(2):21–23.[3],,,.[P].:01221773.5,2002–01–23.[4],.LDA[J].,1996,24(3):59–64.[5],,.[J].,1995,9(4):319–325.[6],,,.,,[M].:,1996.19–32.Scale-upofMistSwirlSeparatorsWEIWei-sheng,FANJian-hua,BAOXiao-jun,SHIGang(TheKeyLaboratoryofCatalysis,ChinaNationalPetroleumCo.,UniversityofPetroleum,Beijing102200,China)Abstract:Experimentswereconductedinthreeswirlmistseparators,withtheinternaldiametersbeing340,480,and700mm,respectively.Theseparatorswereequippedwith18setsofswirlvanes.Theeffectsofsuperficialgasvelocityandgeometricalparameters,suchastheelevationandtheradialangleoftheswirlvane,vanenumber,theratioofseparatorbodyheighttodiameteronmistseparationefficiencyandpressuredropweretested.Resultsshowedthattheseparationefficiencyandpressuredropincreasedaselevation,radialangleandvanenumberwereincreased.Anoptimalsuperficialgasvelocityexistsintherangefrom5to9m/sanditdecreasesslightlywithscale-up.Theoptimaldistancebetweentheswirlvaneandinnerexitingtubeis32%~73%oftheseparatordiameter.Themistseparatorshouldbedesignedtomaketheseparationefficiencyashighaspossible,withthepressuredroplessthan2kPa.Thestructureoftheswirlvaneisoneofthemostimportantparametersbywhichpressuredropisdetermined.Apressuredropcorrelationwasestablishedbasedonexperimentaldataandtheoreticanalysis.Ascale-upprocedurewassuggestedforthedesignofindustrialmistseparators.Pressuredropsmeasuredfromtwoindustrialscaleseparators(φ1.52mandφ1.90m)werefoundingoodagreementwiththepredictedvalues,andtheseparationefficiencyofgreaterthan95%wasachieved.Keywords:mistseparator;swirlvane;separationefficiency;pressuredrop