聚丙烯工艺描述

UNIPOL™PPProcessDescriptionUNIPOL™PP工艺过程描述1DescriptionoftheContractPlant合同工厂描述2UNIPOLPPProcessUnitUNIPOL聚丙烯工艺装置3AuxiliaryProcessFacilities辅助工艺装置UNIPOL™PPPROCESSDESCRIPTIONUNIPOL™PP工艺过程描述1DescriptionoftheContractPlant合同工厂描述TheContractPlantconsistsofapolypropyleneprocessunitdesignedtoproduce400KTAofpelletedpolypropylenefrompropylenebasedonUNIPOL™PPTechnologylicensedbyUnionCarbideChemicals&PlasticsTechnologyLLC,asubsidiaryofTheDowChemicalCompany.TheUNIPOLPPProcessisalow-pressuregas-phasefluidizedbedprocessforthemanufactureofPPresins.合同工厂包含一套基于UNIPOL™PP技术的生产40万吨/年的聚丙烯工艺装置，该技术转让自陶氏化学公司下属的联合碳化物（联碳）化学和塑料技术公司。UNIPOL™PP工艺技术是一项用于生产聚丙烯树脂的低压气相流化床工艺。InadditiontotheUNIPOLPPProcess,resinhandlingandblendingfacilitiesarealsoincludedintheContractPlantbatterylimits.Otherauxiliaryfacilitiesincludeutilitydistribution,flareandplantinfrastructuresystems.ThePDPprovidesadequateinformationtoallowthesesystemstobeeasilydesignedbytheEngineeringContractor,resultinginsavingstotheLicensee.TheproductbaggingareaisoutsidetheContractPlantbatterylimitsandwillbedesignedbytheLicensee.在UNIPOL™PP工艺之外，树脂处理和掺混也包括在本合同工厂范围之内.其他辅助工艺设施包括公用工程分配，火炬，工厂基础设施。工艺包提供了足够的信息使工程承包商能很容易的设计这些系统,从而使专利受让方节省投资.产品包装区域是在合同工厂之外，由该技术买方设计。2UNIPOLPPProcessUnitUNIPOL聚丙烯工艺装置TheUNIPOLPPplantISBLiscomprisedofthefollowingprocessareas.UNIPOL聚丙烯工厂界区由下列工艺单元组成：A.RawMaterialSupplyandPurification原料供应和精制B.PropylenePurification丙烯精制C.Reaction聚合反应D.ResinDegassing树脂脱气E.VentRecovery尾气回收F.ResinAdditiveHandling添加剂的加入G.Pelleting造粒Eachisdescribedindetailinthefollowingsections.Nocatalystpreparationisnecessary–SHAC™catalystisdeliveredtotheplantreadytouse.Nogas/solidseparationisneededduetotheuniquedesignofthereactorandproductdischargesystem.TheprocessunitslistedaboveareincludedintheLicensor’sProcessDesignPackage(PDP).每一单元都将在下面的章节详细描述．催化剂制备是不需要的，因为卖方会将直接可用的SHAC™催化剂运到工厂。由于特殊的反应器和产品下料系统的设计，也无需单独的气固分离装置．以上所列的工艺装置都包含在专利商的工艺设计包(PDP)中．A.RawMaterialSupplyandPurification(Part1)原料供应及精制（第1部分）Ethylene,nitrogen,andhydrogenaredeliveredtothebatterylimitsbypipeline.Co-catalyst,T2,isreceivedfromvendorshippingcontainerswiththeseshippingcontainersstoredintheISBLarea.乙烯，氮气和氢气通过管线送至界区边界。助催化剂三乙基铝则来自储存在界区内的厂商运输过来的储罐。EthylenefromBatteryLimitsiscompressedto635psigintheEthyleneCompressor(K-1003)andheatedto100°CintheEthylenePreheater(E-1006)beforepassingthroughtheCORemovalVessel(C-1008).Theethyleneisthencooleddownto40°CintheEthyleneAfter-Cooler(E-1010)beforebeingfedtotheEthyleneDryer(C-1012)forremovalofwater,miscellaneouspolarcompoundsandcarbondioxide.Finally,ethyleneispassedthroughtheEthyleneFilter(Y-1002)toremoveparticulatecontaminationbeforeitissenttothereactionarea.从界区外来的乙烯先经过乙烯压缩机(K-1003)压缩至635psig，然后通过乙烯预热器(E-1006)加热至100°C，再进入脱一氧化碳床(C-1008)。然后乙烯通过乙烯后冷却器(E-1010)冷却至40°C，再通过乙烯干燥器（C-1012）以除去水、各种极性成分和二氧化碳。最后，乙烯再经乙烯过滤器（Y-1002），去掉颗粒杂质，而后才被送至反应系统。Nitrogenisreceivedfromtheboundarylimitsandtheflowissplitbetweendifferentendusers.NitrogennotrequiringpurificationispassedthroughaFilter(Y-1101)beforebeingsenttotheprocess.PurificationbedregenerationnitrogenisfeddirectlytotheN2RegenerationHeater(E-2114)withoutpurificationorfiltration.NitrogenforbothPurifiedandHighPressurePurifiedendusesispassedthroughtheNitrogenDryer(C-1112)toremovewater.FromtheDryeroutlet,NitrogenpassesthroughtheNitrogenFilter(Y-1115)toremoveparticulatecontamination.AportionofthisfilterednitrogenisfedtoasmallboosterCompressor(K1102)whichisusedtoincreasethepressureofthenitrogentoitsnormaloperatingpressureofabout660psig(4,551kPag)forfeedtothePPreactionsystem.HighpressurenitrogenispassedthroughaFilter(Y1116)toremoveparticulatecontaminationpriortobeingfedtotheprocess.由界区外来的氮气分流至不同的最终用户。不需要精制的氮气，只需在送至工艺区之前通过过滤器(Y-1101)。精制床再生氮气不需要经过精制或过滤就可直接送到氮气再生加热器(E-2114)。需要精制的氮气和高压精制的氮气会经过氮气干燥床(C-1112)去除水。从干燥床出来的氮气经过氮气过滤器（Y-1115）去除颗粒杂质。这股过滤氮气的一部分会进入一个小的压缩机(K-1102)，升高氮气的压力至进入聚丙烯反应系统的正常操作压力660psig(4,551kPag)。高压但其在进入工艺系统之前通过一个过滤器(Y-1116)去除颗粒杂质。HydrogenfromtheboundarylimitsispassedthroughtheMethanatorHeater(E-1204)whichincreasestheHydrogentemperaturetobetween100°Cand150°C.Atthattemperature,theHydrogenenterstheMethanator(C-1205)fortheremovalofcarbondioxideandcarbonmonoxide.ThecatalystcontainedintheMethanatorconvertstheCOandCO2toMethaneandWater.MethaneisaninertinUNIPOLReactor.TheHydrogenleavingtheMethanatoriscooledintheMethanatorAftercooler(E1206).FromtheAftercooler,HydrogenpassesthroughtheHydrogenDryer(C-1207)fortheremovalofboththewatercontainedintheincomingHydrogenandthatformedthroughtheMethanationreaction.ThehydrogenthenpassesthroughtheHydrogenFilter(Y-1211)toremoveparticulatecontaminantsbeforeitissenttothereactionsystem.来自界区的氢气通过甲烷化预热器（E-1204）将氢气温度升至100°C至150°C之间。在此温度下，氢气进入甲烷转化器(C-1205)去除二氧化碳和一氧化碳。在甲烷转化起中的催化器将一氧化碳和二氧化碳转化成甲烷和水。甲烷在UNIPOL反应器中是一种惰性气体。离开甲烷转化器的氢气在甲烷化后冷却器(E-1206)中进行冷却，然后氢气通过氢气干燥器(C-1207)去除进料氢气中所含的水和在甲烷化反应中生成的水。脱水后的氢气然后通过氢气过滤器(Y-1211)除去颗粒杂质，然后进入反应系统。LiquidT2isfedundernitrogenpressurefromitsrespectiveshippingcontainerstotheliquidfullT2FeedPot(C-1505).ThefeedpothasatwohourholdtimeandisequippedwithlevelindicationtoindicatewhenT2containerchangeoutisrequired.FromtheT2feedPottheliquidT