赛区师范学院1213项目摘要团队

PET产能增加较大，乙二醇需求仍存在较大缺口。所以我国当前加大乙二醇产能投资极Althoughinternationalproductivityofethyleneglycol(EG)isrelativesurplus,theEGproductioninisfarfromenoughtosatisfytheneedsofthedownstreamindustryandisstillheavilydependentonimports.Inrecentyears,productioncapacityofEGexpandsrapidlyin,whichhasreached5.945milliontonsperyearin2014.BecausethedownstreamPETcapacitygreatlyincreased,thereisstillabiggapinethyleneglycoldemand.SotheincreaseofEGcapacityinvestmentincurrentlyhashighlystrategicsignificance.BasedonnationalconditionsandtheconditionsofYaoLongGroup’smainnt,choosinganoptimalEGproductiontechnologyisthecoreconceptofpracticallydesigningthisbranchfactory.TheEGcleanerproductionprojectinthisreportistotakesyngasasrawmaterial,toprepareEGbyhydrogenationofdimethyloxalate(DMO),torealizerecyclingsubstancessuchasmethanol,nitricoxide,heprocess,thusbetterconformingtotheprincipleofatomeconomyforcleanerproduction.30万吨，副产硝酸、碳酸二甲酯和混合多元醇。总体项目工艺主要分为亚分厂设计三个车间，厂区占地共65880㎡，与总厂比邻。ThisdesignisEGbranchntprojectforYaoLongChemicalGroup,locatedattheJiangyinindustrialparkinFuqingcity.Anannualoutputof300000tonsofEGhasbeendesigned,withby-productsofnitricacid,dimethylcarbonate(DMC)andmixedpolyols.Overallprojecttechnologyismainlydividedintofiveprocessstepssuchasmethylnitriteregeneration,catalyticcouplingreaction,catalytichydrogenationprocess,EGrefiningandmethanolrecycling.Threeworkshopshasbeendesignedforthebranchntnearthemainfactory,whichcoversanareaof65880㎡.二醇，工艺简图如图2-1所示。BasedontheproductiontechnologyofEGfromsyngas,thisdesignprojectistousenitricoxide,oxygenandmethanoltogeneratemethylnitritewhichcoupledwithcarbonmonoxidetopreparedimethyloxalatebycouplingreaction,thentheend-productEGisobtainedbycatalytichydrogenation,theprocesssimplediagramasshowninfigure2-1. TheprojectprocessschematicdiagramofEGThemixtureofnitricoxideandoxygendeliveredfromthemainfactoryistosynthesisemethylnitritewithmethanol,80%oftherawmaterialcanbeconvertedintomethylnitrite,andtheother20%generatetheby-productnitricacidwhichwillbeseparatedbynitricacidseparationtower,withrecyclingmethanolbydistillation.Carbonmonoxideismixedwithmethylnitriteobtainedfromtheprevioussection,whichareledintothereactorafterpreheatingsothatdimethyloxalate,dimethylcarbonate,methylformate,etc.willbeobtainedbythecatalyzedcouplingreaction.Togetpuredimethyloxalateneedstoseparateby-productsandotherimpurities,soanabsorptiontower,withmethanolasabsorbent,issetinthissectionfirstforimpurities’separationandthebyproductsareseparatedinthesubsequentseparationtower.Thedimethyloxalateneededinthenextsectionwillbefurtherrefinedandalsohashigherpurity.Thehydrogenationreactionofdimethyloxalateisatypicalconsecutivereaction,withthefirsthydrogenationstepgettingmethylglycolateandthesecondstepproducingEG.Thereactionmayfurthergenerateethanolduetoexcessivehydrogenation,alsoalongwithsidereactionsofalcohols,sothereactionconditionsneedwellcontrolledinthissectiontoensuretyandqualityofEG.ThepurityofEGproductcanreachto99%afterrefiningprocess,simultaneouslycirculationuseofmethanolandrawmaterialgashasbeendone.F1浮阀塔板，处理Keyequipmentdesignisfortowerandreactor.TowerequipmentoftecolumnadoptstraditionalF1floatingvalvetray,withhigherprocessingabilityandteefficiency,smallercolumnpressuredrop,lowercostandhigherreliability.ThedesignedDividingWallcolumnsusethepackedtower,withhighefficiencyandenergysaving,easytocontrol.Reactordesignismainlytheaxialadiabaticfixed-bedreactorswhichaccordwiththecharacteristicsandrequirementsofbothreactionsofmethylnitritecouplinganddimethyloxalatehydrogenation,withrefinementandreasonable.Inaddition,thepump,compressor,gas-liquidseparator,storageandotherequipmentalsohavefinisheddesignandtype-selection.Chemicalprocessdesignneedstochoosereasonablecontrolschemesaccordingtothecontrolrequirements.Thisdesignprojectofchemicalprocessautomationcontrolsystemcanmeettheproductionrequirementsandprocessoptimization:improvingtheoperationprecisionofthekeyprocessparameterstoimprovethequalityandyieldofproducts;ensuringthesafetyofchemicalprocessandthestableoperationsofequipment;reducingthebatchdifferenceinbatchoperation,maintainingthestabilityandrepeatabilityoftheproductionprocess;reducingthelaborintensityofworkersandtheinfluenceofartificialfactorsontheEnergyyzer对工艺过程进行夹点分析和换热网络的优化设计，提出过程节能优化方kJ/hAlotofstreamsneedheatingorcoolingintheprocessofthisprojectsothatutilitiessystemdemandishuge.Theenergysavingoptimizationiscriticalformanychemicalindustryenterpriseswhichhavehighenergyconsumption,evendirectlyaffectingtheenterprise'seconomicbenefit.AspenEnergyyzerwasusedinthisprojectforprocesspinchysisandtheoptimumdesignofheatexchangernetwork,andenergysavingoptimizationdesignschemewasputforward(thetotalamountofenergysavingreached9.002×107kJ/h):afteroptimized,coldutilitysneed2.258×108kJ/h(maincoldmediaincludingcoolingwater/20℃,frozenbrine/0℃,ammoniarefrigerant/-40℃);hotutilitysneed2.480×108kJ/h(mainthermalmediaincludinglowpressure /0.8MPa,mediumpressure /4.0MPa,high /12.0TheobjectiveofthiscleanerproductionismainlymanifestedinthefollowingThisprojectadoptsthesyngasrouteforsynthesismethodofEG,asthisgasphaseroutebeingshortandthereactionconditionsbeingmild.Thesyngasisadoptedascleangasfortherawmaterials.Correspondingsecurityspecificationsarecomplete,withnoexplosiondangerformixingandsafetyinoperations.TherawmaterialsforthisbranchntcanbeobtainedfromthemainfactoryofYaoLongGroupbygeneralintegrationofmassproductiondevices.ThelowpressureandpowerarealsoprovidedbyYaoLongTianchen.Thuscleanresourcesandenergyareadoptedfromlarge-scaleintegrationoftechnology,whichwillcutquiteapartofpollutionintheprocessofcoaltosyngasandoftheprocessing.多元醇及合成装置产生的废瓷球、废分子筛吸附器、脱色白土和生活等。能够回收利用的废物与专业公司合作进行回收利用，不能回收利用的集于场或危化废固The"threewastes"ofthedesignedprocessarelessandcentralizedfornningandprocessing,withadvancedmonitoringtechnology.Wastegasismainlyfromindustrialexhaustedgasanddischargeduptostandardafterthetorchburning.Wastewaterismainlyfromprocesswaterandsanitarysewageandthroughthepipagetothewastewatertreatmentstationofmainntforcentralizedprocessing,nextsenttoparksewagefactoryforfurtherprocessingafterreaching3classwaterdischargestandards,andthenwillbedischargedthroughanoceanicoutfallafterreaching2classdischargestandards.ThesolidwastesaremainlyincludingtheDMCbyproductfromsynthesisreactionofdimethyloxalateandthespentcatalystsofsyntheticunits,themixedpolyolsbyproductfromsynthesisofEGandthewasteporcelainballofsyntheticdevice,thewastemolecularsieveadsorber,thespentbleachingclay,thedomesticwaste,etc.Thewastesthatcanberecycledandreusedwillberecycledbycooperationwithspecializedcorporations;theotherswillbecentralizedlytreatedbywastetreatmentnts.Noisepollutionmostlycomesfromfactoryequipmentoperation,andthisprojectistoreducethesoundpollutionbythereasonablelayoutdesigningofntandequipment,byadoptingadvancedlownoiseequipment,buildingsound-proofroomsforcentralizedcontrolequipmentoflargersound,addingsound-proofshieldandmufflerforpartoftheequipment,etc.ThisbranchntprojectchoosesFuzhouYaoLongChemicalGroupco.,.astheupstreammainfactory,whichislocatedatJiangyinchemicalindustrialparkinFuzhou,Fujianprovince,wheretheEGproductionbranchpantisdesingedtobebuilt.SothatthisprojectcanuseYaoLong ’sintegratedutilitiesandrawmaterials,withwaterandelectricityresourcesbeingabundant,theparkterrainbeingSmoothandbroadandconvenientfortransportation,whichprovidesreliableguaranteefortheprojectsuccess. nt ThediagramofEGntlayout区绿化合理，以噪音和有害因素，强化安全环保。考虑未来发展，发展预留地定于Theentirentisnedasrectangularlayout,275meterslong,249meterswide,thetotalareaisof65880㎡.Thewholefactoryisdividedintofourparts:factoryfrontarea,productionarea,auxiliaryareaandstoragearea.Thentlayoutdesignisstrictlyinaccordancewiththesafetyrequirements,withworkshoplayoutsbeingstandard,materialflowchartbeingreasonable.Atthesametime,thetransportationroutesarereasonablyarrangedaccordingtotheseparationconceptofmaterialsandpeople.Thefactoryvirescenceisreasonablelydesignedtoisolatethenoiseandotherharmfulfactors,tostrengthenenvironmentalprotection.Consideringthefuturedevelopment,abackuplandhasbeentothesoutheastofthent. ThesecondworkshopAutoCAD完成平面布置图设计。针对重点的第二车间进一步应用PDMS进行翔实的三维设备布置设计和管道布置设计。Theworkshoplayoutofthisprojectisstandardandreasonable,andAutoCADismainlyappliedtocompletethelayoutdesign.PDMSisfurtherusedinthefocusofthekeysecondaryworkshopfordetailed3Dequipmentlayoutdesignandpilayoutdesign. Economicysisisthecorecontentofprojectfeasibilitystudyandevaluation,alsoistheimportantbasisofdecision-making,whosefunctionistoizeavoidingriskandtoimprovetheinvestmentbenefit.Thisprojectisoftwoyearsconstructionperiodandoffouryearsproductionperiod.Andetailedandinformativeevaluationhasbeenmadethroughtheengineeringconstruction,thecostofproduction,productbenefitsandsoon,withfurtherprofitabilityysisandsensitivityysis.Thefeasibilityofthisprojectandthepossibilityofcontaininghugeeconomicandsocialbenefitshasbeendemonstratedfromtheoftechnicaleconomics,whichshowsimportantrealisticandpracticalsignificanceforour Table7- Summaryofmaintechnicaleconomic123456789%练AutoCAD、AspenPlus、PDMS、AspenEnergyyzer等专业设计工具，在本分厂8-1所示。Ourteamhasstrivedunremittinglyandauouslyformonths,andhasseriouslycarriedthroughthedesigningjobssuchasinformationretrieval,liturereview,fieldresearch,beingfamiliarwi