船舶燃油硅铝对机器的影响

GencoFleetOfficersMeetingTianjinOctober11th&12th2010FuelOilIssuesCatalyticFines(Catfines),Casestudy,PanamaxbulkcarrierOshimabuilt1999MainEngine-7RTA48TBUnitoverhaul8000hrsTotalrunninghours60000hrs,MAINENGINETROUBLEREPORT,25THAUG09:VESSELRECEIVEDBUNKERATZHANGJIAGANG,CHINA.MIXINGOFBUNKERS.VESSELCOULDNOTLANDBUNKERSAMPLEFORANALYSISDUETOCUSTOMREGULATIONSINCHINADEPT.ZHANGJIAGANGON27THAUGUSTUSINGMIXEDFUELFROMCENTRETANK.,ISEVERYTHINGINORDER?,WHATPRECAUTIONSDOWENEEDTOTAKETOCOMPLETETHEVOYAGEWITHOUTBUNKERANALYSISREPORT?,ENSUREPURIFIEROPTIMUMPERMORMANCEWITHMINTHROUGHPUT.OPERATETWOPURIFIERSINSERIESASPURIFIER&CLARIFIER,OROPERATETWOPURIFIERSINPARALLEL.ENSUREFINEFILTERSINGOODCONDITION,NOBY-PASS.FUELADDITIVE.INFORMOFFICE.SEEKADVISE.,01STSEPT-M/ENo.2UNITSCAVENGEAIRTEMPERATUREHIGHALARM(80DEG).CYLINDEROILFEEDINCREASED.SHORTENEDTHEDISCHARGINGTIMEOFH.F.O.PURIFIERFROM45MIN.TO30MIN.,03RDSEPT-M/ENo.2UNITSCAVENGEAIRTEMP90DEG.M/ESPEEDREDUCEDTO105RPM.THEUNDERPISTONTEMPWASSTILLRISING.M/EREDUCEDTO96RPM.THETEMPREACHED120DEGREEANDM/ESLOWEDDOWNAUTOMATICALLY.UNIT#2CUTOFF,M/ESPEEDINCREASEDTO64RPM,BUTTHETURBOCHARGERSURGED.OTHERUNITSEXHAUSTTEMPEXCEEDED450DEG.M/ESPEEDREDUCEDTO48RPM.CHANGEDTOANOTHERFUELTANK(STBD)WITHOUTMIXEDFUEL.04THSEPT-UNITNO.2OVERHAULED.ALLPISTONRINGSBROKEN,PISTONCROWNGROOVESOVERSIZED,ABNORMALLINERWEAROUT.PISTONCROWNANDALLPISTONRINGSRENEWED.RESUMEDVOYAGEWITHM/ESPEED110RPM.,ARRIVEDHAYPOINT(AUSTRALIA)ANCHORAGEON7THSEPT.FUELOILSAMPLELANDEDFORANALYSISBYARRANGINGHELICOPTER.FOLLOWINGMAINTENANCECARRIEDOUTDURINGSTAYATHAYPOINTFROM7THTO19THSEPTEMBER.-UNITNO.1,4AND6OVERHAULED.PISTONCROWNANDPISTONRINGSRENEWED.-UNITNO.5AND7EXHAUSTVALVEANDFUELVALVEREPLACED.-MAINENGINEEXHAUST&SCAVENGEMANIFOLDINSPECTED.-MAINENGINEAIRCOOLERCLEANED.,NEXTVOYAGEAUSTRALIATOCHILEBUNKERANALYSISREPORTNOTYETRECEIVED.M/EUNITSGIVINGTROUBLE.CONDITIONOFOTHERUNITSASINSPECTEDTHROUGHSCAVENGEPORTS.WHATPRECAUTIONSSHOULDWETAKE?,ENSUREPURIFIERMAXPERMORMANCEWITHMINTHROUGHPUT.OPERATETWOPURIFIERSINSERIESASPURIFIER&CLARIFIEROR.OPERATETWOPURIFIERSINPARALLEL.ENSUREFINEFILTERSINGOODCONDITION,NOBY-PASS.FUELADDITIVE.INFORMOFFICE.SEEKADVISE.,Bunkeranalysisreport,VLCLogNo.F090931562Date09/24/09Bunk.PortandDateZhangjiagang,China,08/25/09PlaceandDateSentAUSTRALIA-09/14/09SupplierCHIMBUSCODateReceivedatVLC09/24/09SampleTypeperCustomerIFO380GradeRMG380TamperProof00317:SealedCustomerfurnisheddata:Quantity900M.Tons,SPECIFIEDPARAMETERSFORRMG380Density15degC989.9kg/m3(991.0Max)APIGrade11.36(11.20Min)Viscosity50degC316.50cSt(380.00Max)Viscosity100degC31.8cSt(35.0Max)UpperPourPoint15degC(30Max)CarbonResidue12.51%wt.(18.00Max)Ash0.040%wt.(0.150Max)Water0.15%vol.(0.50Max)Sulfur2.64%wt.(4.50Max)Sediment0.02%wt.(0.10Max)Vanadium105wt.ppm(300Max)Al+Si55ppm(80Max)FlashPoint70degC(60Min),ADDITIONALPARAMETERSSI28ppmAL27ppmNa27ppmCa5ppmFe16ppmPb1ppmNi18ppmP1ppmZn1ppmMg1ppmCCAI853Calorificvalue40.29MJ/kgMinimumTransferTemperature40degCInjectionTemperature(For13cStViscosity)132degCEngineFriendlinessNumber(EFN:1-100)50,SO,WHATISWRONGINTHEREPORT?ANYIMPORTANTACTIONMISSEDFROMBEGINNING?,GRADECONFORMANCE-Density,APIGravity,WateroutsidethespecificationsforRMG380.COMMENTSSUGGESTIONS&RECOMMENDATIONS:-Temperatureforinjectionviscosity10is146C.-Temperatureforinjectionviscosity15is128C,DENSITY:Observation:Thoughwithinlimit,densityishigh.-Ensureefficientpurificationbymaintainingfueltemperaturearound98C.FitthecorrectgravitydiscifyouarenotusinganAlCaptypepurifier.Observation:Thoughwithinlimit,densityishigh.-Ensureefficientpurificationbymaintainingfueltemperaturearound98C.FitthecorrectgravitydiscifyouarenotusinganAlCaptypepurifier.CATFINESObservation:Catfinescontent(Aluminum+Silicon)infuelishigh.-Catfinescausehighwearinrubbingsurfacesofcylinderandfuelsystem.Ifthecatfinescontentislessthan15ppm,wearandtearfortheenginewillbeminimal.Increasedcatfinecontentwillincreasethewearrate.Purifycontinuouslyandre-circulatethefuelseveraltimestobringdownthecatfinescontent.,POURPOINTObservation:Heatandstorethisfuelat10Cabovethemeasuredpourpointtemperature.CCAIObservation:IgnitiondelayisindicatedbyCCAIgreaterthan840formedium-speedenginesandgreaterthan870forlow-speedengines.,OVERALLQUALITY:EngineFriendlinessNumber(EFN)isauniquebench-markoffuelqualityevaluatedbyVISWALABfromthepointofviewofenginewearandtearresultingfromtheuseofthisfuel.BasedonEFN,whichiscalculatedfromtheanalysisresultslistedinthisreport,thequalityofthisfuelisaverage.,26thSEPT-M/ENo.1UNITSCAVENGEAIRTEMPAT81DEGANDALARM.REDUCEDM/E108RPMANDALARMRESET.27THSEPT-M/ENo.1UNITSCAVENGEAIRTEMPAT82DEG.M/ENo.2UNITSCAVENGEAIRTEMPERATUREAT94DEG,M/EREDUCEDTO87RPM.28THSEPT-UNITNO.1AND2AGAINOVERHAULED.PISTONCROWNGROOVESOVERSIZEDANDPISTONRINGSBROKEN.REPLACEDPISTONCROWNANDALLPISTONRINGS.NO.2UNITLINERRENEWEDDUETOLINERWEAROUTTOMAXLIMIT.,WHYDOYOUTHINKISHAPPENING?,01STOCT-M/ENo.5UNITSCAVENGEAIRTEMPERATUREAT78DEG.M/ESPEEDREDUCEDTO108RPM,AVOIDALARM.02NDOCTM/ENo.5UNITFUELOILINJECTIONVALVESRENEWED.06THOCT-M/ENo.1UNITSCAVENGEAIRTEMPERATUREAT78DEG.M/ESPEEDREDUCEDTO106RPM,AVOIDALARM.,08THOCT-M/ENo.1UNITSCAVENGEAIRTEMPSUDDENLYRISETO105DEG,WITHABNORMALNOISE.M/ESPEEDREDUCEDTO87RPM.THETEMPERATUREWASSTILLRISINGSLOWLY,CUTOFFTHISUNIT.M/ESPEEDREDUCEDTO70RPM.TURBOCHARGERKEPTSURGINGLIGHTLY.MEANTIMEFOUNDM/ENo.2SCAVENGEAIRTEMPREACHED79DEGREE.09THOCT-M/ENo.2SCAVENGEAIRTEMPREACHED105DEGREE,WITHABNORMALNOISE.M/ENo.5SCAVENGEAIRTEMPERATUREREACHED75DEGREE.REDUCEDM/ESPEEDTO48RPM.,10THOCT-SCAVENGEINSPECTIONCARRIEDOUT.FOUNDNo1&2UNITPISTONRINGSCOLLAPSED.ALLSCAVENGEAIRPORTSBADLYFOULED.RESTARTEDENGINEAFTERSCAVENGECLEANING.M/ENo.5SCAVENGEAIRTEMPERATUREREACHED78DEGREE.,WHATISGOINGWRONG?WHATCANHAPPENNOW?WHATSTEPSNEEDTOBETAKEN?,11THOCT-M/ENo.5SCAVENGEFIRE.EXTINGUISHEDTHEFIRE.STOPPEDM/E.REMOVEDTHESLUDGEDEPOSITSOFNo.4,5,6&7UNITUNDERPISTON,THENRESTARTEDM/E.CUTOFFNo.2UNITOWINGTOHIGHSCAVENGEAIRTEMPERATURE(98DEGREE)ANDRESUMEDVOYAGE.NOW1&2UNITSCUTOFF.,HAVEWETALKEDABOUTTHEWEATHER?THEHOLESARELININGUP.,WINDFORCE1011.TUGSWERECALLEDFORASSISTANCE.WITHAIDOFTWOTUGS,M/ESPEEDKEPT36-48RPM.13THOCT/1600HRS-ARRIVEDPUNTAARENASANCHORAGE.,POORPROPULSIONPOWER.ALMOSTLOSTTHEVESSEL.CRTTEAMMOBILIZEDINOFFICE.SEAFARERSLIFEINDANGER.,WHATISCATFINE?,Catalyticcrackers(Alumino-Silicates)areusedtoextractandincreasethequantityoflighterproducts(andmorevaluable)suchasPetrol(Gasoline)Theintentionistoretainthecatalystparticlesorfinesinthecatalyticcrackerduetothehighcostofthereplacementofthismaterial,butthisisnotentirelypossible.Apartofthecat-finesmixeswiththeoilstreamsthatarethenusedforblendingfueloils.EngineMakersrecommendfuelhavingmaximumcat-finesof15PPMsuppliedtoEngine,CATFINESObservation:Catfinescontent(Aluminum+Silicon)infuelishigh.-Catfinescausehighwearinrubbingsurfacesofcylinderandfuelsystem.-Ifthecatfinescontentislessthan15ppm,wearandtearfortheenginewillbeminimal.Increasedcatfinecontentwillincreasethewearr