工艺技术聚乙烯工艺描述英文工艺技术聚乙烯工艺描述英文 UNIPOLPEProcessDescriptionUNIPOLPEProcessDescription UNIPOLPE 工艺描述UNIPOLPE 工艺描述 TABLEOFCONTENTSTABLEOFCONTENTS PROCESSDESCRIPTIONPROCESSDESCRIPTION 1.1ContractPlantComposition 1.1.1PEProcessUnit 1.1.2SupportingFacilities 1.1.3AuxiliaryFacilities 1.2ProcessIntroduction 1.2.1DescriptionofPEProcessUnit 1.2.2DescriptionofSupportingFacilities 1.2.3DescriptionofAuxiliaryFacilities 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 1.1ContractPlantComposition1.1ContractPlantComposition TheContractPlantproduces300,000TPYofpelletedLinearLow,Medium,a ndHighDensityPolyethylenefromethylene,whichmayinvolvetheadditi onofacomonomer(butene-1orhexene- 1)forsomeProducts.TheContractPlantBatteryLimitsisrepresentedin thediagramprovidedinAttachment11ofthisAppendix.TheContractPlan tconsistsofthefollowingsystems. 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： 1.1.1PEProcessUnit1.1.1PEProcessUnit ThePEProcessUnitutilizesUnivationTechnologiesUNIPOLPEProce ss,alowpressuregasphasepolymerizationprocess,andincludesthefol lowingprocesssystems: RawMaterialSupplyandPurification EthylenePurification Reaction(includescatalysthandlingandfeeding) ResinDegassing VentRecovery SeedBedSystem ResinAdditiveHandling Pelleting 1.1.1PE 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 1.1.2SupportingFacilities1.1.2SupportingFacilities TheSupportingFacilitiesforthePEProcessUnitincludethefollowingp rocesssystems: ResinHandlingSystem 1.1.2 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 1.1.3AuxiliaryFacilities1.1.3AuxiliaryFacilities TheAuxiliaryFacilitiesforthePEProcessUnitincludethefollowingpr ocesssystems: SteamandCondensateRecoverySystem FlareSystems WasteWaterCollectionandPretreatmentSystem UtilityDistributionSystem 1.1.3 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 1.2ProcessIntroduction1.2ProcessIntroduction ThedesignofthePEProcessUnitwillincorporatethelatestUNIPOLPEPro cessKnow-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。 1.2.1DescriptionofthePEProcessUnit1.2.1DescriptionofthePEProcessUnit ThePEProcessUnitcomprisesanumberofprocesssystems,whicharedescr ibedindetailinthefollowingsections: RawMaterialSupplyandPurification(Part1) EthylenePurification(Part2) Reaction(Part4) ResinDegassing(Part5A) VentRecovery(Part5B) SeedBedSystem(Part5E) ResinAdditiveHandling(Part6) Pelleting(Part7) ProcessFlowDiagrams(PFDs)thatrepresenttheseprocesssystemsarepr ovidedinAttachment12ofthisappendix. Alloftheequipmentdescribedinthefollowingprocessdescriptionisin cludedinthepreliminaryequipmentlistprovidedinAppendix5. 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)RawMaterialSupplyandPurification(Part1) NitrogenandhydrogenaredeliveredtotheContractPlantBatteryLimits bypipeline. Comonomers,butene1andhexene1,andInducedCondensingAgent(ICA),is opentane,aresuppliedtotheContractPlantbypipeline.Ithasbeenassu medthatsufficientstoragecapacityisavailablefromtheOutsideBatte ryLimits(OSBL)forbutene1,hexene1,andICA. Cocatalystalkylisreceivedinshippingcontainersforusedirectlyint hePEProcessUnit. Comonomer Purification Acommonpurificationsystemisprovidedforthetwocomonomers- butene1andhexene1.LiquidcomonomerfromtheBatteryLimitsisfeddire ctlyintotheComonomerDegassingColumn(C1008).Thecolumn,whichismo untedontheComonomerSurgeTank(C1007),isequippedwithwatercooledC omonomerCondenser(E1009)andsteamheatedComonomerReboiler(E1010) .Asmallstreamofoverheadgas,containingstrippedlightgascontamina ntsventstotheflare.ThebottomproductfromtheComonomerSurgeTankpa ssesthroughComonomerCooler(E1011).Thecoolersprimarypurposeis toprovideadequateNPSHfortheComonomerChargePump(G1002orG1003,an installedspare).TheComonomerChargePumpbooststhecomonomerpressu retoapproximately2,861kPag(415psig)forflowintotheReactor.Fromt heComonomerChargePump,comonomerflowsthroughtheComonomerDryer(C 1004orC1005)toremovewaterandotherpolarimpuritiesfromthecomonom erstreambyphysicaladsorption.Themolecularsievebedsrequireperio dicregenerationwithhotnitrogen.ThespareComonomerDryerisusedwhi letheotherisbeingregenerated,thusallowinguninterruptedcomonome rflow. Nitrogen Purification NitrogenfromtheBatteryLimitspassesthroughtheNitrogenPreheater( E1108)beforeenteringtheNitrogenDeoxoVessel(C1109orC1111).TheNi trogenDeoxoVesselcontainsafixedbedoffreecoppercatalystwhichrem ovesoxygenfromthenitrogenstreambyoxidationofcoppertocopperoxid es.Thecatalystbedrequiresperiodicregenerationwithastreamofhydr ogendilutedinhotnitrogen.NitrogenleavingtheNitrogenDeoxoVessel isfedtotheNitrogenDryer(C1112).TheNitrogenDryercontainsmolecul arsieveswhichremovewaterandotherpolarimpuritiesfromthenitrogen streambyphys