API机械密封冲洗方案.ppt
- 文档编号:1385236
- 上传时间:2022-10-21
- 格式:PPT
- 页数:34
- 大小:7.40MB
API机械密封冲洗方案.ppt
《API机械密封冲洗方案.ppt》由会员分享,可在线阅读,更多相关《API机械密封冲洗方案.ppt(34页珍藏版)》请在冰豆网上搜索。
APIPipingPlansAPI冲洗方案,November2004,JCTianjinTrainingModule4.3,SealEnvironment密封环境,1,APIPipingPlansAPI冲洗方案,Integral(internal)recirculationfrompumpdischargetoseal,Advantage-NoexternalpipingLimitations-Changingflowraterequireddismantlingofpump-Forcleanpumpagesonly,APIPipingPlansAPI冲洗方案,PointstoNoteforAPIPlan02:
-Theinjectiontappingisusedforventingpriortostartup.-APIplan02isoftenusedtogetherwithplan62,especiallyonhightemperaturebellowsseals.,APIPipingPlansAPI冲洗方案,Noflushingtothemechanicalseal(dead-ended),PointstoNoteforAPIPlan11:
-Useanorificetorestricttheflowrateifthedischargepressureis3barhigherthansealchamberpressure.-Useoncleanandlowabrasivesduties,APIPipingPlansAPI冲洗方案,SealFlushingBy-PassfromDischarge单密封通过出口进行冲洗,Recirculationfromsealchamberthroughaflowcontrolorificeandbacktopumpsuction,PointstoNoteforAPIPlan13:
-Useanorificetorestricttheflowrateifthesealchamberpressureis3barhigherthansuctionpressure.-handleabrasivesdutybetterthanAPIplan11-highersealchamberpressuretosuppressvaporisation,APIPipingPlansAPI冲洗方案,+,=,PointstoNoteforAPIPlan14:
-Flowbacktosuctionsidewillevacuatevapoursthatmaycollectinsealchamber.-Recommendedforlighthydrocarbonservice.,APIPipingPlansAPI冲洗方案,RecirculationfrompumpdischargethroughaflowcontrolorificeandcoolertosealOpenLoopCoolingCircuit,CoolingWaterOutlet,CoolingWaterInlet,APIPipingPlansAPI冲洗方案,RecirculationfromapumpingringinthesealchamberthroughcoolerandbacktosealClosedLoopCoolingCircuit,Throatbushing,Suction,Discharge,18-24,Ventathighestpointofthepiping,CoolingWaterOutlet,CoolingWaterInlet,mechanicalsealwithpumpingring,Heatexchanger,APIPipingPlansAPI冲洗方案,PointstonoteforAPIPlan23:
Thermosyphondesign*heatexchanger18to24abovepumpcentreline.*Preventoverheatinginstandbyandstartup.Installclosefittingneckbushingatthebottomofsealchambertoisolatetheheatfromtheimpellerend.Usedonhightemperatureapplicationstominimiseheatloadonthecoolerbycoolingonlysmallamountofliquidthatisrecirculated.ForhightemperatureboilerfeedpumpapplicationsOtherapplications*hightemperatureliquidclosetobubblepoint.,APIPipingPlansAPI冲洗方案,Recirculationfrompumpdischargethroughacycloneseparatordeliveringcleanfluidtothesealandfluidwithsolidsbacktopumpsuctionline,APIPipingPlansAPI冲洗方案,PointstoNoteforAPIPlan32:
-Choseapropersourceofsealflushtoeliminatethepotentialforvaporisationoftheinjectedfluidandtoavoidcontaminationofthefluidbeingpumpedwiththeinjectedflush.-Installalabyrinthbushingatthebottomofthestuffingboxtocontroltheflushingandpressureifnecessary.,APIPipingPlansAPI冲洗方案,SingleSealFlushingfromExternalSource单密封通过外部来源进行冲洗,ThroatBushing,Recirculationfrompumpdischargethroughacycloneseparatordeliveringcleanfluidthroughacoolerandthentosealandfluidwithsolidsbacktopumpsuctionline,CoolingWaterOutlet,CoolingWaterInlet,APIPipingPlansAPI冲洗方案,Needlevalve,Externalreservoirprovidingadead-endedblanketoffluidtothequenchconnectionofthegland.,PointstoNoteforAPIPlan51:
-Deadendedblanketonatmosphericsideofsealtopreventfreezingofmoisture.Sealfacewillnotsticktogetherwhenthepumpstarted.Typicalapplication:
Pumpoperatingbelow0C-API6108thEditionhaseliminatedthispipingplan.,APIPipingPlansAPI冲洗方案,PipingSystems,APIPipingPlansAPI冲洗方案,Afluidusedasalubricantorbufferbetweendualmechanicalseals.Thebufferfluidisalwaysatapressurelowerthanthepumpprocesspressurebeingsealed.,Afluidwhichisintroducedbetweendualmechanicalsealstocompletelyisolatethepumpprocessliquidfromtheenvironment.Pressureofthebarrierfluidisalwayshigherthanthepumpprocesspressurebeingsealed.,Thepurposeoffluidcirculationistoremoveheatfrommechanicalseal,APIPipingPlansAPI冲洗方案,Onapplicationsbelowambienttemperature,circulationofbarrierfluidmaynotbedesirable.Theatmospherewillheatthereservoirandconsequentlyaddheattothesealarea.,Fluidcirculationbytemperaturedifferencebetweenthesealandreservoir.Highertemperatureliquidatsealhaslowerdensityrisestothereservoir.Lowertemperatureliquidatreservoirhashigherdensityfallstothesealtoprovidecooling.,ExternalForceCirculation,Thermosyphon,PumpingRing,DeadEnded,APIPipingPlansAPI冲洗方案,PointstoNoteforAPIPlan52:
TypicallyusedwithanArrangement2unpressuriseddualseal.Duringnormaloperation,circulationismaintainedbyaninternalpumpingring.Thereservoirisusuallycontinuouslyventedtoavapourrecoverysystemandismaintainedatapressurelessthanthepressureinthesealchamber.,PressureGauge,LevelGauge,Fillvalve,Orifice,Drain
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- API 机械 密封 冲洗 方案
![提示](https://static.bdocx.com/images/bang_tan.gif)