国外新型换热器介绍_曹纬

曹　纬(,730050)　　,、、、、。。。:　　　　、、。,[1,2],,。1　[3],HelixchangerTM,ABB。,。ABB,。,“”。1/4,,。,(1a)。1b,,(a)(1c)。。,。(b)(c)1　a-;b-;c-　　:①;②。·50·　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　2000286,,1933,,,。:155;　:[phone]-2369(O)。,。,,。2　[4]Alares,BrownFin-tube。“”“”。,。40%,。,ASME。:,,,,,,。,。3　PACKINOX[5,6]PACKINOX,Secatnen,CacDregamont、。198110ElfDanges,CCR,4。、、87×104。,。,,2200t,3,。2　PACKINOX,CCR。PACKINOX2。,。,。,。,,。,。800m2,15000m2。10m2,,。(SUS321/347、SUS304L)。PACKINOX:、、,,,,。4　HiTRAN[7]CalGavinLtd.,Hitanmatrixelements,(Wire-fintubeinsets)。,、。,,,(3)。25()5()。。3　HiTRAN5　SRWTM[5]Hamon-Lummus。3～4·51·曹　纬　,()(19×200mm)。,,4。,,,,,。4　SRWTM6　[8],,“”(шелевойзффекткипения),,(стесненныеусловияшелевыхканалов)。,。()。(5A)。,。,。,,,。,,。,,,。　　　　　　　　　A-1-();2-()B-a-;　b-5　　　,,,(1%～3%)。。(ΔT=1.9K)*35002000/3000/m1014/14/m1.8851.41/2.1/m　2.3282.32/2.32　0.280.28/0.286468/68130101/151/mm　1615/15　14.514/14*ΔT=1.9K;ΔT=1.2K。　　ΔT≥1K,ΔT≥0.35K。7　[9]CarborundumCo.,HeatExchangerwithHexoloyRSiC,、。,。,204.4℃。。1　..,1992,13(2):13.【56】·52·　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　20002865　,,,:(1)。,,,。(2)。,6%[5],,。[6],,,,。,,。1　,,..,1996.2　.——90.,1994,5(1):18.3　,..,1996,2.4　PaulF,JacobsPhd.RapidPrototyping&ManufacturingFundamentalsofStereolithography.PublishedbySocietyofManufacturingEngineers.DeabomMI,1992.5　JacobsPF.StereolithographyandotherRP&MTechnologies.PublishedbySocietyofManufacturingEngineers,1996.6　..,1988.【52】2　,..,1999,20(4):25.3　KralD,StehlikP,VanDerPloecHJ,etal.HelicalBafflesinShell-and-TubeHeatExchangers,Part1:ExperimentalVarification.HeatTransferEngineering,1996,17(1):93.4　BrownFintubeCo.TwistedTubedoesmoreinthesamespace.CEP,1996,92(8):9.5　,.　と.[],1995,(3):44.6　..,1999,29(2):35.7　DavidButterworth,MosconeCF.HeatTransferHeadsintothe21stCentury.ChemicalEngineeringProgress,1991,(9):30.8　познякВЕ,СавелъевВН.ИсследованиетеплопередачаИГцдровлическогоСопротивленияВВитыхконденсаторох-испарителяхизтруъокСдеформированнымореърением.Химическоеинефтегазовоемашиностроение,1997,(2):29.9　CarborundumCo.EnhanceyouheatexchangerwithHexoloyRSiC.ChemicalProcessing,1999,62(6):78.2001《》(2001,:4-669)(1999)390,20001《》《》。《》,。:CN31-1833/TQ;:ISSN1009-3281;:3101064000023;:4-669,()。《》,、、、、,,,。,1964200。《》,16,,,。《》:、、、、、、、、。《》2001,。。:3762211　:200040:(21)32140342×2416:(21)62489867　:[e-mail]　:·56·　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　2000286TheEffectsofDe-amineAftertheIonExchangewithNH+4ontheAcidity,StructureandDealuminumofZeoliteβZhaoYan,LiHua(InstituteofAnalyticalScience,NorthwestUniversity,Xi’an710032)YangXingbing,DuanXue(DepartmentofAppliedChemistry,BeijingChemicalUniversity)Theeffectsofde-amineaftertheionexchangeofNaβwithNH+4onthesurfaceacidityandstructureofZeoliteβandtheeffectsofcalcinationtemperatureonthedealuminationofNH+4βZeoliteframeworkwereinvestigatedusingPy-TPD,XRDandIR.Theresultsindicatethatde-amineathightemperatureleadstothesignificantdealuminationofβZeoliteframeworkandmigrationtosurfaceacidicsitesandresultsintheenrichmentofaluminumontheoutersurfacethanthebody,thedealuminationleadstothedecreaseofcatalystacidity;thehigherthede-aminetemperatureis,thelessertheacidamountandacidstrengthwillbe,LacidmainlyresultsfromthetetrahedralframeworkAl,theacidstrengthofthetetrahedralframeworkAlisstrongerthannonframeworkAl;Itisshownthatthecrystallinestructureandframeworkstructuredecreasewiththeincreaseofthecalcinationstemperature,inthede-amineprocessNH+4nearlyhasnosignificanteffectonthecrystallinityofβZeolite,buttheframeworkaluminumspecieswithNa+aremoredifficulttodetachfromtheframeworkthanthosewithNH+4;ThethermaldecompositionofNH+4isalsooneofthereasonscausingthedecreaseofcrystallinty.Keywords:Zeoliteβ,ionexchangewithNH+4,de-amine,alumination,surfaceacidity,crystallinityIntroductiononNewTypesofOverseasHeatExchangersCaoWei(LanzhouPetroleumMachineryResearchInstitute,Lanzhou730050)Newhigh-effectiveheatexchangersatabroadinlastedyears,forexample,Helixchanger,Twisted-tubeexchanger,Packinox,SRC,HiTRANheatexchangerwithHexoloySiCetal,areintroduced.Theperformanceandstructureofnewtypesofheatexchangesareoutlined.Developmentandapplicationofenhancedheattransferelementsaredescribed.Keywords:newtypeheatexchangers,heattransferperformance,enhancedheattransferStudyontheEffectofPhotocuringResinShrinkageonPartsCurlDistortionintheProcessofLaserRapidPrototypingDuanYugang,WangSuqin,ChenHao,LuBingheng(Xi’anJiaotongUniversity,Xi’an710068)ThephotocuringresinforLaserRapidPrototyping&Manufacturewasprepared,theshrinkagereasonsofphotocuringresinwasanalyzed,andtheeffectofthephotocuringresinshrinkageonpartscurldistortionwasstudied.Itmadealsoanexplanationonpartsdistortionphenomenonfromresinmicrostructureandcurlmechanism,andputforwardedmethodstoimproveitfromtheaspectsofresinandscantechnology.Keywords:LaserRapidPrototyping,photocuringresin,shrinkage,curldistortion·5·ABSTRACT