5PO-PURIF.SYSTEM-SU-FROM-STANDBY-584

NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPROPYLENEOXIDEPURIFICATIONSYSTEMSTARTUPFROMSTANDBYNOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPropyleneOxidePurificationSystemStartupfromStandbyPurposeThefollowingisaguidelinetoStartUpPOPurificationSystemfromStandby.ConditionsThefollowingconditionsmustbesatisfiedpriortostartingthisprocedure:•Utilitiesandflaresystemarecommissioned•CrudePOTankhassufficientPOinventoryforstart-upoperation•Iso-octaneStorageTankhassufficientiso-octaneinventoryforstartupoperation•EGMEsupplyisavailableforstartup.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPropyleneOxidePurificationSystemStartupfromStandbyGUIDELINE•Allreliefvalvesmustbelinedupandoperational.Allequipmentmustbepurgedofoxygen.Allplugsandcapsmustbeinplace.Allblindsandblockvalvesmustbeinnormaloperatingposition.•InventorytheHeaviesRemovalColumn01C0470andtheEGMERegenerator01C0469withEGME.•GraduallyheattheHeaviesRemovalColumnReboiler01E0444to149˚C,theEGMERegeneratorReboiler01E0454to146°CandbeginEGMEcirculationbetweenHeaviesRemovalColumnandEGMERegenerator.•EstablishoperatingpressuresintheHeaviesRemovalColumnandEGMERegeneratorbyventingasnecessary.•DrytheEGMEto200ppmwaterorless.•InventorytheSolventStripperColumn01C0473,theImpuritiesRemovalColumn01C0471,andthePOProductColumn01C0472withiso-octaneandheatupthetowerbottomsto121°C.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPropyleneOxidePurificationSystemStartupfromStandby•EstablishsolventcirculationthroughtheSolventStripperColumn01C0473,theImpuritiesRemovalColumn01C0471andthePOProductColumn01C0472usingpumps01P0446,01P0442and01P0444.•EstablishoperatingpressuresintheSolventStripperColumn,theImpuritiesRemovalColumnandthePOProductColumnbyventingasnecessarytotheLowPressureVentGasSystem.•HeattheSolventStripperColumnbottomsto134°C.•StartPOflowfromtheCrudePOTankintotheC5StripperColumn01C0438.•PumpPO,usingC5StripperBottomsPump01P0404-AorB,totheHeaviesRemovalColumnafterestablishingalevelintheC5StripperColumn.•IncreasesteamtoHeaviesRemovalColumnReboiler01E0444tomaintaintemperatureasnecessary.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPropyleneOxidePurificationSystemStartupfromStandby•PumpPO,usingHeaviesRemovalColumnRefluxPump,totheImpuritiesRemovalColumnaslevelreachesnormalsetpointintherefluxdrum.•IncreasesteamtoImpuritiesRemovalColumnReboiler01E0446tomaintaintemperatureat104°C.•IncreasesteamtoPOProductColumnReboiler01E0449tomaintaintemperatureat134°C.•HaveTankFarmOperatorlineupthePOProductColumnoverheadbacktoOff-SpecPOTankforPOPurificationSystemstartup.•StartrefluxonPOProductColumnusingPOProductColumnRefluxPump01P0445-AorBafterlevelbeginstoshowinPOProductColumnRefluxDrum01D0466.•PumpPO,usingPOProductColumnRelfuxPump,toCrudePOTankaslevelreachesnormalsetpointinthePOProductColumnRefluxDrum.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEPropyleneOxidePurificationSystemStartupfromStandby•WarmtheC5StripperReboiler01E0495andtarget71°C.•EstablishnormaloperationpressureonC5StripperColumn01C0438byventingtoLowPressureVentGasSystem.•IncreasesteamtoC5StripperReboiler01E0495tomaintaintemperatureat82°C.•StartC5StripperRefluxPump01P0403-AorBandbeginrefluxtoC5Stripper.•POPurificationSystemisnowinrecirculationmodeandwhenPOoverheadisontestthencuttorundown.