APH(空气预热器)培训资料

HowdenGroupIn1854Mr.JamesHowden,aScottishengineerestablishedHowdenGroupinGlasgow,Scotland.JamesHowdenHowden-HuaEngineeringCo.,Ltd.-HowdeninChinaIn1994Howden-HuaEngineeringCo.,Ltd.-aJointVenturewasestablishedinWeihaiCity,ShandongProvinceP.R.China.AxialFlowFanJetFanHowden-HuaProductionsMixedFanCoolingFanAirPreheaterGasReheaterCentrifugalFanTypicalArrangementofDuctSystemincludingAPHSCRAPHStructureSADuctBottomGirderEndPillarDriveUnitTopStructureGasDuctPADuctHingedSidePillarRotorHousingRotorTheHowdenrotaryregenerativeairheaterconsistsbasicallyofthefollowingparts:•HeatingSurfaceElementsandContainers•Rotorinwhichtheelementsarepacked•RotorHousinginwhichtherotorrotates•EndPillars•TopStructure•BottomStructure•SealingArrangements•DriveUnit•RotorBearingsAPHConstructionHeatTransferElementsandContainersHS20HS8HS9(CorrugatedUndulated)(FlatNotchedCrossedProfile)(DoubleUndulated)EndplatesSupportbarsDouble-Undulatedprofileoptimisedforenamellingandminimumpressuredrop.AirPreheaterleakageRotorDistortionandLeakageofFixedSealDesignVNVNFixedSealDesignHotConditionsColdConditionsSiteErectionsEndPillarEndPillarSidePillarSidePillarK3K4K2K1H2H3H4H1K2H3H4H2H1K3K4K1EndPillarSidePillarPreparationoftheClient’sSupportSteelStructure1.Checkthatthelevelanddrillingofthesupportingsteelworkattheloadpointsarecorrect.2.Usingthepackersandshimmaterialprovided,leveloutthelandingpointsonthesupportingsteelworkandtackweldthepacking/levellingmaterialinposition.3.Thepermissibledifferentialdeflectionbetweenanyofthereheatersupportpoints‘H’and‘K’onthesupportsteelworkshouldbelimitedto10mm.Measureandrecordthelevelnessofthe‘H’and‘K’loadpointsontheclient’ssupportingsteelwork.4.Tolerance=±2mm.ErectionsofBottomgirderandBottombearing2.Cleanthebearinghousingwithwettishflour.Neverforgettopourlubricatingoilonthesurfaceofalltherollersandthebearingraceimmediatelyforantirustafterassemblingthebearingintothebottombearinghousing.3.Thebottombearingandhousingshouldbecentralisedwithrespecttothegirderends(endpillarhingesmountingholes).Shimtoachievetheheightasshownonthedrawing.4.Assemblebottombearingaccessplatformtothebottomgirderasshownonthedrawing.1.Checkorientationofgasreheaterwithsupportingsteelworkinaccordancewiththegeneralarrangementdrawing.Preassemblethebearingcoverwiththebearing.Ensurethatthespigotonthebottomfaceofthebearingcovercorrectlylocateswiththeinnerringofthebottomthrustbearing.1.Assemblethefourendpillarhingestothebottomgirder.Shimtoachieveheightasshowninthedrawingandsecurewiththeboltsprovided.2.Measureandrecordthelevelnessoftheendpillarhinges.Tolerance=±2mm.A,B,C,DEndPillarHingesErectionsMounttheBottomStructure1.Positionthebottomstructureensuringthecorrectdirectionoftri-sectorplate2.Positionthebottomsectorplatesbyensuringthatthebottombearingisinacentrallocationwithrespecttothebottomsectorplateoutsideradius.Tolerance=±2mm.100100XY1.Ensurethecorrectorientationofendpillars.Checkthatbothendpillarsareverticalinbothdirectionsandthatdimensionbetweenthemiscorrectinaccordancewiththedrawing.2.Measureandrecordtheplumbnessoftheendpillars.Tolerance=3mm.3.Fittemporarystaystosecuretheverticallocationsoftheendpillars.MounttheendpillarsMounttheHubSpiderCaremustbetakenwhenloweringtherotorspidertoensurethattherecessinthebottomfaceoftherotorhubcorrectlylocateswiththespigotonthejackingplate.Liftthespiderandcleanthebottomflangesurfaceofthespider.Removeburrsandrepairknockedmarksifnecessary.Installtemporarypropstoholdtherotorspiderlevelapprox.Installthetopstructure1.Positionthetopstructureontotheendpillarsandalignaccordingtothecentrelines,ensuringthattheholeonthetopstructurecentralisethehub.2.Bolttogetherwithendpillarsbyangles.TopstructureBopstructureMounttheTopBearingAssembly.1.Carefullyinstallthetopbearingass.snuglyintospigotofhubspiderwiththeeyeboltafterpositionthetopglandseal2.Tightenthespecialboltswithrequiredtorque,whilethetheheadofboltssnuglycontactthefaceofshaft.3.Adjusttherelativeelevationwiththeshimsunderthesupportchannel4.Leveltheshaftendwiththeodolitebyadjustingboltstoolandfitwithscrews.M36EyeBoltTo2000NmMountthedriveunit1.Measureandcheckthediametersofborefordriveunitandshaftrespectively2.Carefullyliftthedriveunitthroughtheshaftuntillocatingontheshoulderofshaftwithspecialtools3.InstallshrinkdiscasperrequirementsonthedrawingMounttherotorhousingonairsideandtri-sectorplates1.Toenforcethestabilityofcentersection,assemblytheairsidehousingandtri-sectorplate&axialplate2.Greatattentionmustbetakentoweldthejunctionbetweentri-sectors.MounttheductsontheairsideEnsuretheductsflangetotakeupthecorrectpositionasrequired,i.e.overlappingtheinsideedgeofthehousinglandingplatebyanominal20mmAssembletheRotorOuterSections1.SiteassemblytherotorsectionssymmetricallyduetotheIDplatesstampedonthespiderandrotorsectionsrespectively2.Adjustthesectionstoensurethataxialandradialswashbetweenall24radialplatesmustnotbeexceeded±3mm3.Adjustandaveragethepitchesbetweenouterrotorsectionswithspecialtools.Assembletherotor-siteweldedsectors1.Assemblethesiteweldedsectors/loosesectorplatesymmetricallyduetoIDplatesbetweenth