赛区-工业forerunner1设计集0design abstract焦炉烟气脱硫项目

CONTENTS

PROJECTINTRODUCTION 3

PROCESSDESIGN 3

ENERGY-SAVINGDESIGN 4

EQUIPMENTDESIGN 6

CONTROLSCHEME 6

SECURITYYSIS 7

ECONOMICYSIS 7

SITELOCATIONANDLAYOUTSCHEME 7

SUMMARY 8

ProjectIntroduction

Inrecentyears,asindustrializationdevelopsrapidly,theenvironmentalpollutionproblemssuchashaze,acidrainarealsohighlighted.Theemissionsofindustrialwastegasescontainingsulfurisanimportantfactorleadingtoenvironmentalpollution.Atpresent,treatmenttoemissionofSO2hasnotmeettherequirementsofenvironmentalprotection,whichrestrictsthesustainabledevelopmentofoursocietyandeconomy.Therefore,thedepthremovalofSO2fromindustrialwastegasisextremelyurgent.

Figure1Industrialemissions

Now,over100kindsofdesulfurizationhasbeenresearched,ofwhichmorethanadozenhaveachievedindustrialization.Duetothehighdesulfurizationefficiencyandvaluablebyproductsofammoniatechnology,ithasbeenwidelyusedinJapan,Germanandotherdevelopedcountries.

Entrustedbya,ourprojectaimstodesigntheammoniasystemfortheproject“thepurificationoffluegasdischargedbytwo tons/yearcokeovens”.

ProcessDesign

Theobjectofthisprojectis220,000Nm3/hcokeovenfluegascontainingdust,SO2andNOX.TheprojectusesSCRdenitrificationtechnologyandammoniadesulfurizationtechnologytopurifyfluegas,producingammoniumsulfateasbyproducts.

Theprocesscontainsfivesections,includingdenitrificationanddustremoval,thermalrecovery,desulfurizationandammoniumsulfaterefining,ammoniastation.

Figure2 Processflowdiagram

Energy-savingdesign

Heatexchangernetworkoptimization

Thisprojectinvolvesmanyutilities.Inordertomeetthedesigngoalutilitycostminimumandequipmentcostminimum,accordingtothepinchdesignmethod,thisprojectcombinedwiththeactualsituationofthefactoryequipmentarrangementbyusingtheAspenEnergyyzersoftware.Atlast,thesoftwaredesignedakindofoptimummatchingschemeofcoldandhotflowstocks.

Figure3 Initialheatexchangernetwork

Figure4Optimizedheatexchangernetwork

OrganicRankineCycle

OrganicRankineCycle(ORC)isconsideredasapromisingtechnologyforeffectiveutilizationoflow-temperatureenergy.Thisprojectusescokeovenfluegasaslow-temperatureenergysourcesoastoachievethepurposeofrecyclingheat.Seemoredetailsinthe“innovativenotes”,thetenthchapter.

Figure5 OrganicRankineCycle

IntheprocessofORC,turbinemachinecanprovideelectricity129.548kW.

Electricenergyisakindofenergythatismorevaluablethanheat.Theelectricconversioncoefficientisabout3.29.Therefore,theenergywhichprovidedbyORCis426.21kW.

EquipmentDesign

Theprojectdesignprocess,mainlydesigndetailedforreactor,theabsorptiontowerandthedistillationtower,seperator,storageandotherequipments.Seemoredetailsinthe“equipmentdesignandselection”,theninethchapterof“Preliminarydesignspecification”.

ControlScheme

Inourfactory,allprocessequipment,utilitiesandauxiliaryfacilitiesusethecost-effectiveDCScontrolsystem,matchingwithsafetyinstrumentationsystem(SIS),achievingdistributedcentralizedoperation.Wealsocreatereal-timedatabaseacoveringalltheactory.Analarmactionoradjustmentorshutdowncontrolwillbeperformedontheresultsofthedetectioninthecontrolsystem,establishingthefoundationforthewholentcomputerinformationmanagementandproductionscheduling.

Figure6ExampleofDCScontrolsystem

Duetothesecurityrisksofflblegassuchasammoniacontainedintheprocessflows,itisimportanttomonitortheamountofoxygencontainedintheprocessflows.Wealsousedtheemergencyshutdownsystem(ESD)torealizethemonitorofprocessunitsandrelatedutilities.

Security ysis

TheprojectusesRiskSystemsoftwaretocarryoutasignificanthazardidentificationinthe areaofthent.Accordingtothephysicalpropertiesofthematerial,thesourcephaseofthematerialwas yzed.Andthenaccordingtotheresultsoftheysis,itpredictsthepoolfireaccidentmodel,boilingliquidextendedexplosionmodeland cloudexplosionmodel.Besides,theprojectalsousesALOHAsoftwaretocarryoutthesimulationofa cloudexplosionaccident,BLEVEaccident,poolfireaccidentandpoisoningaccident.AndtheprojectusesNoiseSystemsoftwaretoevaluatenoiseofthentanditssurroundingsandScreen3Modsoftwaretoconductanenvironmentalimpactassessment.TheprojectalsousesHAZOPsoftwaretoconductriskassessment,achievingstablecontrolofequipmentandsystems.

Economic ysis

Oureconomicandtechnicalysisobeytherelevanteconomicindicatorsandysismethods.Afterfullyinvestigatingthemarketprice,weuseAspenEconomicyzertoperformauxiliarycalculations,estimatinganddescriptingdetaidlyaboutthewholentinvestment,profits,cashflow,etc.Seemoredetailsinthe“economicysis”.

SiteLocationandLayoutScheme

Takingvariousfactorsintoaccount,weselectthesiteinHaichengEconomicandTechnologicalDevelopmentZoneofAnshan,Liaoning.HaichengislocatedinthehinterlandofLiaodongPeninsula.Thetotalareaofthewholeareaof2732squarekilometers.HaichengisanimportanttransporthubinsouthernLiaoningcity,locatedintheconnectionpointofLiaodongPeninsulaandtheinland.HaichengfacesDontheeast,southnearstheportcityofYingkouandDalian,westmeetsPanmianandfacessteelcityAnshanandtheprovincecapitalofShenyang.Inthearea,Shendaway,Changdarailwayandhighspeedrailwaybeingconstructedlinksnorthand

south.Haigourailway,Haiyourailway,PanhaiwayandJingdanwaybeingconstructedlinkseastandwest.

Inaddition,asonceheavyindustrybasearea,pollutionproblemwidelyexistsinHaichengEconomicandTechnologicalDevelopmentZone.ChoosingAnshanShengmengLimited locatedheremeetstheneedsofthesocialenvironmentandernment.

Figure7 Liaoningeconomicindustrialbeltlayout

Summary

Inthedesignprocess,wedesignedthefluegasdesulfurizationanddenitrificationprocessthroughliturereview,finishedprocessdesignandsimulationbyAspenPlussoftware,fullyverifiedthedesignoftheprocess.Accordi