10EPOX.SYSTEM-EMERG.SD---CML-526

NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEEPOXIDATIONSYSTEMEMERGENCYSHUTDOWNNOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEEpoxidationSystemEmergencyShutdownPurposeThepurposeofthisprocedureistoshutdowntheEpoxidationSystemtoasafeconditionintheeventofanemergencyshutdown.ConditionsAnemergencyshutdownoftheEpoxidationSystemshouldoccurintheeventofagasketfailure,linerupture,fire/explosion,orautilitiesfailure.Inanemergencyshutdowncondition,onlythecontrolvalveswillbeclosedusingthevalve'scontrollerunlessacontrolvalveissuspectedofleakingthrough.Inthosespecialcases,ablockvalvewillhavetobemanuallyclosedtoeliminatetheleakage.NOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBEGuideline•InitiateMode3–EpoxidationHotShutdown.NOTE:MONITORLEVELINTBHPSTORAGETANK01T0204ANDOPERATEPEROXIDATIONREACTORSACCORDINGLY.•RemoveanddisplaceTBHPfromequipmentandpipingbyflowingTBAFlushthroughallflushpointsintotheEpoxidationReactorSystemforatleast2hours.•MonitortemperaturesonIsothermalsreactorsandAdiabaticreactorsTC-23281AthroughJandTC-24787AthroughJtoensurereactionhasstoppedandtemperaturesaredropping.•Closethesteamvalveon01E0210usingHC-23230.•VerifyHS-23214TBHPfrom01T0204isclosed.•VerifyHS-23215freshcatalystisclosed.•VerifyHS-23216thedischargeofthe01P0218-A/Bisclosed.EpoxidationSystemEmergencyShutdownNOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBE•VerifytheHighPressureTBAFlushtothelastfiveinjectionpointsisflowingusingFC-23201B,FC-23201C,FC-23201D,FC-23201E,andFC-23201F.•VerifytheTBHPbreakthroughisdroppingusingAI-24719AAandAI-25187B.•MonitorpropyleneflowandrecycleflowattheEpoxidationRecycleJetPumps01J0217-A/BusingFC-23213A,FC-23213B,FC-23286A,andFC-23286B.•MonitortheHighPressureTBAFlushattheEpoxidationRecycleJetPumps01J0217-A/BusingFI-23201JDandFI-23201JE.•VerifythePropyleneRecycleEpoxidationFeedPump01P0225-A/Bisrunning.•Closethesteamvalveon01E0235preheaterusingHC-25130.•MonitorpressureonEpoxidationFirstStageReactionSystemusingPC-23283ifpressurefallstolowminimumflowbypassaroundPC-23283mayneedtobeblockedin.•MonitorpressureonEpoxidationSecondStageReactionSystemusingPC-26201ifpressurefallstolowminimumflowbypassaroundPC-26201mayneedtobeblockedin.EpoxidationSystemEmergencyShutdownNOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBE•Monitor1stStagePreflashColumnrefertoEpoxidationFirstStageSeparationSystemOperationandOperatingVariables.•Monitor1stStagePrimaryFractionatorrefertoEpoxidationFirstStageSeparationSystemOperationandOperatingVariables.•Monitor2ndStagePreflashColumnrefertoEpoxidationSecondStageSeparationSystemOperationandOperatingVariables.•Monitor2ndStagePrimaryFractionatorrefertoEpoxidationSecondStageSeparationSystemOperationandOperatingVariables.NOTE:IFTHELEAKISONTHETBHP/CATALYSTMIXINGDRUMAND/OR01P0218-A/BPIPINGREFERTO“MODE10–MIXINGDRUMDE-INVENTORYSEQUENCE”PROCEDURE.REFERTOPROPYLENERECOVERYCOLUMNSYSTEMSHUTDOWNTOSTANDBY.EpoxidationSystemEmergencyShutdownNOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBE•Shutdownthepropylenepumps01P0216-A/B/Cand01P0225-A/B.•ShutdownthePrimaryFractionatorVaporCompressor01K0201.•EnsureEpoxidationReactorSystemhasbeenflushedwithTBAFlushfor2hoursandTBHPconcentrationatAI-24719AAandAI-25187Bis0ppm.•BlockinallTBAFlushinjectionpoints.•ClosecontrolvalvePV-23283usingPC-23283onthefeedtothe1stStagePreflashColumnandblockminimumflowbypassline.•Verifymake-upPOtothe1stStagePreflashColumnisclosedbyusingFC-25673.•Shutdowntherefluxpumps01P0237-A/Bafterthe1stStagePreflashColumnisstable.•ClosecontrolvalveFV-25655usingFC-25655onthe1stStagePreflashColumnoverheadvaporline.•CloseImpuritiesRemovalColumnrecyclevalveFV-47108usingFC-47108tothe2ndStagePrimaryFractionator.EpoxidationSystemEmergencyShutdownNOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBE•ClosethebottomsvalveFV-25618usingFC-25618onthe1stStagePreflashColumn.•CloseS1steamvalveHV-25431on1stStagePrimaryFractionatorReboilers.•Shutdown1stStagePrimaryFractionatorReboilerCondensatePumps01P0266-A/B.•Shutdown1stStagePrimaryFractionatorBottomsPump01P0234-A/B.•ClosethebottomsvalveFV-25418usingFC-25418onthe1stStagePrimaryFractionator.•ClosepressurecontrolvalvePV-26201usingPC-26201onfeedlinetothe2ndStagePreflashColumnandblockminimumflowbypassline.•Ensurethefeedvalvefrom2ndStagePrimaryFractionatortothe1stStagePrimaryFractionatorisclosed.•ClosethefeedvalveFV-26218usingFC-26218to2ndStagePrimaryFractionator.EpoxidationSystemEmergencyShutdownNOTE:ThisisforTrainingonly,andisnotintendedtobeusedasastepbystepprocedure.PO/MTBE•Shutdowntherefluxpumps01P0239-A/Bafterthe2ndStagePreflashColumnisstable.•ClosetheoverheadvaporflowcontrolvalveFV-26255usingFC-26255onthe2ndStagePreflashColumn.•CloseS1steamvalveHV-25231on2ndStagePrimaryFractionatorReboiler.•Shutdown2ndStagePrimaryFractionatorReboilerCondensatePumps01P0267-A/B.•Shutdown2ndStagePrimaryFractionatorBottomsPump01P0231-A/B.