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M Pumps Asia Pacific Pte. Ltd. No.42 Mactaggart Road, #02-2
Mactaggart Building
Singapore 368086 Tel:(65) 6316 1339 Fax: (65) 6287 1406
Email: [email protected]
1
CaseStudy:#0006
FormosaSyntheticRubberCorporation,partofFormosaGrouphadcompletedtheconstructionof50KTAIsobutyleneandIsopreneRubberPlantinNingboZhejiang.TherearetremendouschallengeswhencomingtopumpinghighlyflammableandhighvapourpressurefluidsinthePetrochemicalIndustry.ManyexperiencedengineerslamentedthattherewerenoreliablepumpsavailableinthemarketplacewhichcouldsuccessfullyhandletheLowNPSHA,gas/liquidmixture,lowviscosityandexplosivenatureofthesefluids.Ironically,mostplantengineerswouldimmediatelyrejecttheproposalonmagneticallydrivenpumpswhichwerefrequentlysynonymouswithpoorreliabilityandcostlyfailures,SaidMr.Fong,FormosaRotatingEquipmentSpecialist.However,withthelatestdevelopmentandbreakthroughincombinationsidechannelpumpsbyMPumps,solutionsarenowavailableforplantengineerstotacklethesechallengesposedbythevolatilefluidsinthePetrochemicalIndustry.TraditionallyVS6,VerticalMultistages,Doublecasing,VerticallySuspendedCentrifugalPumpsareusedfortransferringandunloadingIsobutyleneinthetankfarm.ThemainreasonistotacklethelowNPSHAbyloweringthepumpheadintothegroundtoincreasetheNPSHAagainstthePumpsNPSHR.Themultistageimpellersaretoproducehighpressureneededtodeliverthefluidintotheprocess.However,thedesign,installation,maintenanceandthemechanicalsealsystemarecomplicatedandcostlyforaVS6Pump.Thedeliveryleadtimecouldalsotakeupto12months.Facingwiththehighcost,designchallengesandalongleadtimeforacquiringVS6pumpsfortheproject,theFSRCprojectteamhadmadeanunprecedenteddecisiontoinstallMPumps;combinationmultistagesidechannelpumps,SCMAGMseriestoaddressthepumpingofIsobutyleneinthetankfarm.ThedistinctivefeaturesofSCMAGMseriesofcombinationsidechannelpumpsareasfollow:
1)
TheSCMAGMseriesismagneticallydrivenseallesspumps.Thatmeansthesepumpsareleakfreewithouttheneedsofanymechanicalsealanditsupportingsealingsystem.
Breaking new ground for the application of combination side
channelpumps for Isobutylene tank farm at Isobutylene Isoprene
Rubber (IIR)FormosaNingboPlant.
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M Pumps Asia Pacific Pte. Ltd. No.42 Mactaggart Road, #02-2
Mactaggart Building
Singapore 368086 Tel:(65) 6316 1339 Fax: (65) 6287 1406
Email: [email protected]
2
2)
ThecurrentSCMAGMseriesofpumpsofferscapacityupto85M3/hrandtotaldynamicheadof450m,makingthisrangeofpumpssuitablefortankfarmtransferapplication.
3)
TheSCMAGMseriesofpumpsismanufacturedinaccordancewithAPI685,Doublecasing,centrelinemountedwithmaximumworkingpressureof50BarG.Thatmeansthesepumpsarebuiltwithgreatreliabilityandperformance.
4)
TheSCMAGMseriesofpumpsisselfpriming,abilitytohandleupto50%liquid/Gasmixture.ArmedwithfirststagelowNPSHRimpellerandmultistageperipheralimpellermeanthesepumpscanachieveanNPSHRaslowas0.3meter.Theinherentselfbalanceoftheperipheralimpellerenablesthesepumpstoresistcavitationduringanunfavorableprocessconditions.
5)
TheSCMAGMseriesofpumpsisbuiltwithtwoconfinedgasketswhichgreatlyreducesthepotentialleakedpointsandenhancesthesafetyoftheplantwhenpumpinghighlyexplosiveandflammablefluids.
Thecombinationmultistagesidechannelpumps,SCMAGMseries,offereddistinctadvantagesagainstVS6asfollow:
1)
ByinstallingSCMAGM,thetotalcostsofequipmentprocurement,installationandfuturemaintenancearegreatlyreducedascomparewithVS6.
2)
TheinstallationissimplifiedforSCMAGMwhichjustplacedhorizontallyonthefoundationascomparetoVS6inwhichaholemustbedugonthegroundtoaccommodatetheverticallysuspendedpumpsalongwithitscaisson.
3)
NomechanicalsealisdeployedonSCMAGMmeansinstallationisgreatlysimplified.MechanicalsealanditssealingandmonitoringsystemareneededforaVS6Pumpsinstallation.
4)
SCMAGMisselfpriming,selfvent,resistscavitationunderunfavourbleconditions.VentingisrequiredforVS6pumpforitsmechanicalsealwhichisinstalledonthetopofthepumpscolumn.VS6Pumpsaremultistagecentrifugalimpellerdesignedwhicharepronetodamagewhenhandlinggas/liquidmixture.
5)
EaseofmaintenanceastheSCMAGMisinstalledhorizontallyonthefoundation.AnyrepairworkscarryoutonVS6willrequireliftingequipmentandthehassleofdealingwithlonglineshaft.
6)
General8~16weeksofdeliveryleadtimeisrequiredforSCMAGMascompareto24weeks~52weeksdeliveryforaVS6pump.
ThroughthetechnicalmeetingwithMPumps,wehadcometoknowthatthereweremanygreatinnovationsanddevelopmentsinMPumpsthatbroughtthemagneticallydrivenpumpstechnologiestoanewfrontier.WeweredelightedtolearnaboutthenewbreakthroughsinthedesignofSCMAGM.,andthesuperiorfeaturespossessedbythisrangeofpumps.Infact,manyofourbusinessunitswerefacingthechallengesofhandling
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M Pumps Asia Pacific Pte. Ltd. No.42 Mactaggart Road, #02-2
Mactaggart Building
Singapore 368086 Tel:(65) 6316 1339 Fax: (65) 6287 1406
Email: [email protected]
3
volatilefluidsandIwasnothesitatingtorecommendthecombinationsidechannelpumpstosolvetheexitingpumpsandsealfailuresinotherFormosasplants,SaidMr.Fong.InfactMPumpshadasimilarapplicationfor2unitsofSCMAGM30/6SA600operatingwith20%ChlorineGas/liquidmixtureinFormosaPlasticsGroup,TexasUSA.ThisprovenapplicationhadfurtherconvincedhimthatthiswastherighttypeofpumpsforpumpingIsobutyleneinthetankfarmfortheIIRNingboProject.SpecificationofPumpsinstalledinIIRProject:1)
Service:IsobutyleneTransferPumpsModel:SCMAGM50/8SA300NumberofStages:8StagesFeatures:DoubleCase(Barrel),centreLinemounted,withonly2confinedGaskets.Centrelinemounted.Medium:IsobutyleneCapacity:14.7m3/[email protected]:0.569Viscosity:0.15cPsVapourPressure:4.7BarANPSHA:0.94meterNPSHR:0.5meterDesignPressure:50BarSuction/Dischargeconnection:4/2ANSI#300RFFlangeWettedMaterial:CF8MMotor:22KW/1450RPM,380V/3PH/50Hz,DIIBT4.Qty:2sets2)
Service:IsobutyleneTruckUnloadingPumpModel:SCMAGM50/2SA300NumberofStages:2StagesFeatures:DoubleCase(Barrel),centreLinemounted,withonly2confinedGaskets.Medium:IsobutyleneCapacity:16m3/[email protected]:0.569Viscosity:0.15cPsVapourPressure:4.7BarANPSHA:1.37meterNPSHR:0.5meterDesignPressure:50BarSuction/Dischargeconnection:4/2ANSI#300RFFlangeWettedMaterial:CF8M
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M Pumps Asia Pacific Pte. Ltd. No.42 Mactaggart Road, #02-2
Mactaggart Building
Singapore 368086 Tel:(65) 6316 1339 Fax: (65) 6287 1406
Email: [email protected]
4
Motor:7.5KW/1450RPM,380V/3PH/50Hz,DIIBT4.Qty:1setSiteInstallationPhotos:
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M Pumps Asia Pacific Pte. Ltd. No.42 Mactaggart Road, #02-2
Mactaggart Building
Singapore 368086 Tel:(65) 6316 1339 Fax: (65) 6287 1406
Email: [email protected]
5
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M Pumps Asia Pacific Pte. Ltd. No.42 Mactaggart Road, #02-2
Mactaggart Building
Singapore 368086 Tel:(65) 6316 1339 Fax: (65) 6287 1406
Email: [email protected]
6
PossibleApplicationsandSolutions
TheSideChannelPumpsareuniquelydesignedtohandleLiquid/GasMixtureupto50%withoutimpairingtheperformanceofthepump.Thedesignofthestellarimpellerisnotonlyinherentlyselfbalancedbutenablesittohandleentrainedgasesandresistscavitation.Ithasanamazingcapabilityofgenerating10timesthedynamicheadascomparetostandardcentrifugalpumpsandpossessesexcellentselfprimingandgashandlingcapabilities.WiththecombinationoffirststageLowNPSHRcentrifugalimpeller(Aslowas0.3meter).Itisnowbeingconsideredasthebestpumpingsolutionforhandlinghighlyvolatileliquid;suchasIsoprene,Isobutylene,Isoprene,LPG,Butadiene,Propylene,MethylChlorideetc.,whicharehighlyvolatile,flammableandexplosive.Thesepumpsareremarkablefortankfarm,truckloadingandunloadingapplicationsinthepetrochemicalindustrywhichinvolvehighlyvolatileliquid.ByreplacingVS6,verticalmultistage,caissonpumpsintankfarmapplicationtoreduceinstallationandequipmentcosts,simplifyinstallationandeaseofmaintenance.Plantownerscannowrealizetheoperationalreliability,safety,andenormousfinancialbenefitgainedbyspecifyingMPumps;heavyduty,magneticallydrivenseallessCombinationSideChannelPumpsfortheabovementionedapplications.
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M Pumps Asia Pacific Pte. Ltd. No.42 Mactaggart Road, #02-2
Mactaggart Building
Singapore 368086 Tel:(65) 6316 1339 Fax: (65) 6287 1406
Email: [email protected]
7
WorkingPrincipleBelowisthebriefexplanationoftheworkingprincipleofSideChannelPumps.
ThePumpedliquidorliquid/GasmixtureentersthesuctionstagethroughPortB1asthestarimpellerCrotates.Asthecentrifugalforcebuildsup,causesthepumpedliquidtomovebackandforwardmanytimesinthestarwheelCcreatinganintensetransferofenergywhichcangenerate10timesthepumpheadcomparetoastandardcentrifugalpumpsrotatingatthesamespeed.TheCentrifugaleffectofthestarimpellerseparatesthegasfromtheliquid.ThegasbeinghavingalighterdensityisbeingforcetotherootoftheStarimpellerbytheliquid.Asbothliquid/Gasmixtureapproachtheinterrupter,theliquidwillpassthroughportA1intonextstageorintothedischargeandthegaswillpassthroughportA3intonextstageorintothedischargeduringnormalpumpingprocess.ForselfPrimingoperation,moreandmoregasisevacuatedfromtheintakeuntiltheliquidfullyfloodedthepumpandfullpumpingisnowstarted.Theuniquestellarshapedesignedoftheinterstageimpellersenablesthepumptoresistcavitationincomparisontonormalcentrifugalimpellerwhichfacesseverecavitationandvibrationissuewithjust5%entrainedgas.TheuniquefeatureofthesidechannelpumpenablesthePumptoemptyorventintakelineprovidedthereissufficientliquidretainsinthepumpchamber.Theremainingliquidretainsinthepumpschamberplayanimportantroleforthepumptocarryoutcontinuousselfprimingcycle.END
Jan2015
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M Pumps Asia Pacific Pte. Ltd. No.42 Mactaggart Road, #02-2
Mactaggart Building
Singapore 368086 Tel:(65) 6316 1339 Fax: (65) 6287 1406
Email: [email protected]
8
Incriticalfluidhandlingapplicationswherepumpsfailureisnotanoption,safetyandenvironmentcannotbecompromised,youcantrustonMPumpstodelivertheapplicationandengineeringexpertise,productportfolioandreliableperformancethatcomewiththestrengthsandresourcesoftheworldleadingmanufacturerinmagneticallydrivenPumpstechnologies.ThisarticleiswrittenbyDavidPee.,GeneralManagerofMPumpsAsiaPacificPte.Ltd.Hecanbereachedatdpee@mpumps.it.FormoreinformationaboutMPumps,KindlyvisitourCorporateWebSite:http://www.mpumps.it
