Steam Jet Ejector - Vacuum System_FTE | 上原國際有限公司

A typical steam jet ejector system Consistence of one or more steam ejector assemblies with associated ejector condensers arranged to condense vapor ... SteamJetEjector-VacuumSystemAtypicalsteamjetejectorsystemConsistenceofoneormoresteamejectorassemblieswithassociatedejectorcondensersarrangedtocondensevapordischargedfrompreviousejectorstageassembliesasbelowfigures. DesignationsforejectorassemblyDesignationforejectorsystemUstage:4thboosterVstage:3rdboosterWstage:2ndboosterXstage:1stboosterYstage:1stejectorZstage:2ndejectorXYcondenser:1stintercondenserYZcondenser:2ndintercondenserZAcondenser:aftercondenserWRVP:Waterringvacuumpump Commontypeofejector&condenserstage -SinglestagesteamejectorAsinglestagesteamejectorisusedforultimatesuctionpressure10kPa(75Torr)andnormalsuctionpressureupto15kPa(120Torr).Dischargepressureismostlyequivalenttotheatmosphericpressure,forexhaustingthefollowingmethodsareemployed.(1)uptosilencerandmuffler,(2)sealedinhotwellorsealpotwithpressurizedvent,(3)aftercondenser. -TwostagesteamejectorTwostagesteamejectorsareusedforsuctionpressure20kPa(150Torr)orbelow,andtheultimatesuctionpressureisupto2kPa(15Torr).Twostagesteamejectorsincludethreetypes;(1)twostagenoncondensingejector:smallcapacity,(2)twostageejectorwithbarometricintercondenser:continuousoperationandsteamconsumptionpercapacityislowest,(3)twostageejectorwithsurfaceintercondenser:eliminateswatercontaminationandproductrecoverysystem.- ThreestagesteamejectorThreestagesteamejectorsareusedforsuctionpressure5kPa(38Torr)orbelow,andtheultimatesuctionpressureisupto0.5kPa(3.8Torr).Threestagesteamejectorsareincludethreetypes;(1)threestagenon-condensingejector:smallcapacityandintermittentservice,(2)twostageboosterand3rdejectorwithintercondenser:continuousandhighvacuumrange,(3)threestageejectorwithtwointercondenser:achievemaximumsteameconomy.Impossibletocondensegasatpressuretoolowtopermitcondensation(suctionpressurebelow25Torr),withavailablecoolingwater.Thiscaseconsistofvarylarge1ststage(booster),whichisalwaysdesignedtocompressthevaporstothecondensablepressure.-FourstagesteamejectorFourstagesteamejectorisdesignedforhighvacuumrange,suctionpressure0.5kPa(3.8Torr)orbelow,andultimatesuctionpressureinupto0.07kPa(0.5Torr).Thesuctionpressureisbelow4.6Torr,steamsaturationtemperatureissufficientlybelow0Ctofreezemoistureinthesuctiongasandmotivesteam,thustheformingoficebetweenjetnozzleanddiffuserinlet.Theavoidoftheiceformation,requiredsteamjacketthejetnozzleanddiffuser.-FivestagesteamejectorFivestageandsixstagesteamejectorarecommonlyusedforspecialprocessandspaceresearchfield,andvacuummetallurgyprocesssuchasRH-OBdegassingunitatPOSCO.Suctionpressurerangeoffivestagesteamejectoris0.01kPa(0.75Torr)to0.013kPa(0.1Torr).6thstagesteamejectorSuctionpressurerangeofsixstagesteamejectorisbelow0.007kPa(0.05Torr). 返回列表GotoTop