聚乙烯工艺描述英文

UNIPOLPEProcessDescriptionUNIPOLPE工艺描述TABLEOFCONTENTSPROCESSDESCRIPTION1.1ContractPlantComposition1.1.1PEProcessUnit1.1.2SupportingFacilities1.1.3AuxiliaryFacilities1.2ProcessIntroduction1.2.1DescriptionofPEProcessUnit1.2.2DescriptionofSupportingFacilities1.2.3DescriptionofAuxiliaryFacilities目录工艺描述1.1装置组成1.1.1PE工艺单元1.1.2配套设施1.1.3辅助设施1.2工艺介绍1.2.1PE工艺单元描述1.2.2配套设施描述1.2.3辅助设施描述1.1ContractPlantCompositionTheContractPlantproduces300,000TPYofpelletedLinearLow,Medium,andHighDensityPolyethylenefromethylene,whichmayinvolvetheadditionofacomonomer(butene-1orhexene-1)forsomeProducts.TheContractPlantBatteryLimitsisrepresentedinthediagramprovidedinAttachment11ofthisAppendix.TheContractPlantconsistsofthefollowingsystems.1.1合同装置组成本合同装置是用乙烯为单体，可能会引入丁烯-1或己烯-1为共聚单体来生产高、低、中密度聚乙烯树脂的装置，产能为30万吨/年。合同装置界区范围见本附件的附录1-1。本合同装置由下列系统组成：1.1.1PEProcessUnitThePEProcessUnitutilizesUnivationTechnologies’UNIPOL™PEProcess,alowpressuregasphasepolymerizationprocess,andincludesthefollowingprocesssystems:RawMaterialSupplyandPurificationEthylenePurificationReaction(includescatalysthandlingandfeeding)ResinDegassingVentRecoverySeedBedSystemResinAdditiveHandlingPelleting1.1.1PE工艺单元PE工艺单元采用Univation技术公司的UNIPOL聚乙烯技术，这是一种低压气相聚合工艺，包括下列工艺系统：--原料供给和精制--乙烯精制--反应（包括催化剂处理和进料）--树脂脱气--排放气回收--种子床系统--树脂添加剂处理--造粒1.1.2SupportingFacilitiesTheSupportingFacilitiesforthePEProcessUnitincludethefollowingprocesssystems:ResinHandlingSystem1.1.2配套设施PE工艺单元的配套设施包括下列系统：--树脂处理系统1.1.3AuxiliaryFacilitiesTheAuxiliaryFacilitiesforthePEProcessUnitincludethefollowingprocesssystems:SteamandCondensateRecoverySystemFlareSystemsWasteWaterCollectionandPretreatmentSystemUtilityDistributionSystem1.1.3辅助设施PE工艺单元的工艺辅助设施包括下列系统：--蒸汽和冷凝水回收系统--火炬系统--废水收集和预处理系统--公用工程配送系统1.2ProcessIntroductionThedesignofthePEProcessUnitwillincorporatethelatestUNIPOLPEProcessKnow-how.1.2工艺介绍山西焦化聚乙烯装置的设计将采用最新的UNIPOLPE工艺技术。1.2.1DescriptionofthePEProcessUnitThePEProcessUnitcomprisesanumberofprocesssystems,whicharedescribedindetailinthefollowingsections:RawMaterialSupplyandPurification(Part1)EthylenePurification(Part2)Reaction(Part4)ResinDegassing(Part5A)VentRecovery(Part5B)SeedBedSystem(Part5E)ResinAdditiveHandling(Part6)Pelleting(Part7)ProcessFlowDiagrams(PFDs)thatrepresenttheseprocesssystemsareprovidedinAttachment12ofthisappendix.AlloftheequipmentdescribedinthefollowingprocessdescriptionisincludedinthepreliminaryequipmentlistprovidedinAppendix5.1.2.1PE工艺单元描述PE工艺单元由一系列工艺系统组成，下面对这些系统进行详细描述：原料的供应和精制（第1部分）乙烯的精制（第2部分）反应（第4部分）树脂脱气（第5A部分）排放气回收（第5B部分）种子床系统（第5E部分）树脂添加剂处理（第6部分）造粒（第7部分）工艺流程图（PFD）附于本附件的附录1-2。下面工艺描述中涉及的所有设备见附件5中的初步工艺设备清单。RawMaterialSupplyandPurification(Part1)NitrogenandhydrogenaredeliveredtotheContractPlantBatteryLimitsbypipeline.Comonomers,butene1andhexene1,andInducedCondensingAgent(ICA),isopentane,aresuppliedtotheContractPlantbypipeline.IthasbeenassumedthatsufficientstoragecapacityisavailablefromtheOutsideBatteryLimits(OSBL)forbutene1,hexene1,andICA.CocatalystalkylisreceivedinshippingcontainersforusedirectlyinthePEProcessUnit.ComonomerPurificationAcommonpurificationsystemisprovidedforthetwocomonomers-butene1andhexene1.LiquidcomonomerfromtheBatteryLimitsisfeddirectlyintotheComonomerDegassingColumn(C1008).Thecolumn,whichismountedontheComonomerSurgeTank(C1007),isequippedwithwatercooledComonomerCondenser(E1009)andsteamheatedComonomerReboiler(E1010).Asmallstreamofoverheadgas,containingstrippedlightgascontaminantsventstotheflare.ThebottomproductfromtheComonomerSurgeTankpassesthroughComonomerCooler(E1011).Thecooler’sprimarypurposeistoprovideadequateNPSHfortheComonomerChargePump(G1002orG1003,aninstalledspare).TheComonomerChargePumpbooststhecomonomerpressuretoapproximately2,861kPag(415psig)forflowintotheReactor.FromtheComonomerChargePump,comonomerflowsthroughtheComonomerDryer(C1004orC1005)toremovewaterandotherpolarimpuritiesfromthecomonomerstreambyphysicaladsorption.Themolecularsievebedsrequireperiodicregenerationwithhotnitrogen.ThespareComonomerDryerisusedwhiletheotherisbeingregenerated,thusallowinguninterruptedcomonomerflow.NitrogenPurificationNitrogenfromtheBatteryLimitspassesthroughtheNitrogenPreheater(E1108)beforeenteringtheNitrogenDeoxoVessel(C1109orC1111).TheNitrogenDeoxoVesselcontainsafixedbedoffreecoppercatalystwhichremovesoxygenfromthenitrogenstreambyoxidationofcoppertocopperoxides.Thecatalystbedrequiresperiodicregenerationwithastreamofhydrogendilutedinhotnitrogen.NitrogenleavingtheNitrogenDeoxoVesselisfedtotheNitrogenDryer(C1112).TheNitrogenDryercontainsmolecularsieveswhichremovewaterandotherpolarimpuritiesfromthenitrogenstreambyphysicaladsorption.Themolecularsievebedrequiresperiodicregenerationwithhotnitrogen.ThespareNitrogenDryerisusedwhiletheotherisbeingregenerated,thusallowinguninterruptednitrogenflow.HighpressurepurifiednitrogenisutilizedintheReactionSystem,whilelowpressurepurifiednitrogenissuppliedtovariousplacesthroughoutthePEProcessUnit.PurifiednitrogentobecompressedforuseintheReactionSystemistakenfromtheoutletoftheNitrogenDryer.ThepressureisboostedbyNitrogenCompressorPackage(K1102