GE水处理高回收率频繁倒极电渗析EDR脱盐技术 42页

中海油水回用及浓盐水处理技术交流会议高回收率脱盐技术-GE频繁倒极电渗析EDR在废水回用中的应用2011年5月27日北京凯康大厦1/GE/\nElectrodialysisReversal（EDR）AnecomaginationcertifiedproductGE绿色创想认证产品\n电渗析与倒极电渗析电渗析Electrodialysis(ED)AnelectrochemicalseparationprocessinwhichionsaretransferredthroughionexchangemembranesbymeansofaDCvoltage一种电化学分离过程，通过离子在直流电压驱动下透过离子交换膜从而实现分离倒极电渗析ElectrodialysisReversal(EDR)Acontinuousself-cleaningelectrodialysisprocessbymeansofperiodicreversaloftheDCpolarity,switchingconcentratinganddilutingflowstreams一种具有连续自清洁特征的电渗析过程，其通过周期性改变直流电压的极性来实现浓水流与淡水流的周期性切换3/GE/\nSlideforPublicDistributionGE/IonicsEDRTimeline发展时间表2007–GEIntroducestheRe-DesignedEDRPlatform1948-Ionicsdevelops1970-IonicsintroducesionexchangemembranesreversalprocesstoElectrodialysis19501960197019801990200020071997–Introductionof1954–EDTechnologyisdevelopedIonicsEDR2020System4/GE/\nBrackishWaterDesalination（咸水脱盐）BWROOnlyEDROnlyBotharepossiblesolutions5/GE/\nSlideforPublicDistributionTechnologyPerformance:SaltRemovalandRecovery技术表现-脱盐率和回收率TDSRemoved,mg/l25,000SWRO20,000BCEDRisuniquelysuitedtoremovemoderatesalt15,000levelsANDachievethehighestwaterrecoveryforwaterscarceareas.10,000BWRO5,000EDR1,000EDI(E-Cell)1–10mg/lTDSrange50%75%100%6/WaterRecoveryGE/\nSlideforPublicDistributionTypicalApplications典型的应用DrinkingWater饮用水IndustrialProcessWater•Reductionoftotaldissolvedsolids工业工艺用水•Removalofnitrate,fluoride,arsenic,•ReduceTDSpriortoionperchlorate,radiumexchangeMunicipalWastewaterReclaim市政污水回用MassBalanceManagement•CreateIrrigationWatertoreducefreshwaterstress全厂水平衡管理•ForIndustrialMake-upWater•Concentrationofsalt,reducedisposalvolume•Reducemassfluxintoplant7/GE/\nSlideforPublicDistributionElectrolyticCell电驱元件InasaltbathundertheCathode(-)influenceofdirectcurrent,thecations&anionsmigratetowardstheirrespectiveelectrode.FlowofElectronsThisisthebasisforallNa+electrolyticdrivenprocesses.Cl-8/(+)AnodeGE/\nSlideforPublicDistributionElectrodialysis（ED）Cathode(-)-----Na++NaNa+Cation-TransferMembraneNa++DesalinatedProductNa+Cl-Cl-NaCl-ClCl--Anion-TransferMembraneCl-Cl-Na+Cl-ClConcentrate+NaCl-+Cl-Na+Na+NaCation-TransferMembrane+NaNa+Na++NaAnode(+)+++++Theuseofmembranescomposedofionexchangematerialcreates9/separatedesalinatedandconcentratecompartments.GE/\nED工作原理极水淡水浓水淡水极水10/GE/\n阳离子交换膜11/GE/\n阴离子交换膜12/GE/\nEDR工艺流程示意原水浓水补水极水废液产品水浓水循环浓水排放13/GE/\nEDR工作原理•最大程度地减少膜表面结垢以及胶体物质在膜表面的沉积•破坏新生成的沉积，并在沉积对膜造成危害前将其冲洗掉14/GE/\nEDR倒极过程15/GE/\nSlideforPublicDistributionStreamsintheEDRProcessEDR工艺中水流示意进水FeedConcentrateMake-up浓水补水ConcentrateRecycleProduct产水浓水循环Waste废水排污16/GE/\nSlideforPublicDistributionSaltRemovalOptimizationAdjustable60–97%脱盐率优化可调Feed++++++++++++STAGESTAGESTAGESTAGE160%284%94%97%34------------ProductAddmorestackstomakebetterwater.Thisiscalled“staging”.分段设计得到更17/好产水GE/\nSlideforPublicDistributionMultipleStage,MultipleLineDesign多段、多列设计+++++++++---------+++++++++FeedProduct---------+++++++++---------+++++++++---------RecycletoConcentrateCompartmentSideConcentrateBlowdowntoWaste18/GE/\nSlideforPublicDistributionROandEDR:IonRemoval离子去除示意ROFeedROProductConcentrateEDRFeedEDRProductConcentrate19/GE/\nSlideforPublicDistributionROandEDR:EffectsofAntiscalantAddition阻垢剂添加示意ROFeedROProductAntiscalanttofullfeedflowConcentrateEDRFeedEDRProductConcentrateAntiscalanttoconcentrate20/GE/\nSlideforPublicDistributionROandEDR:EffectsofAcidAddition加酸示意ROFeedCO2ROProductAcidtofullfeedflowConcentrateCO2istransferredthroughROmembranestoproduct.ROProductpHisshiftedlower.ROrequiresdecarbonationinmanycases.EDRFeedEDRProductConcentrateAcidtoconcentrateAcidisaddedtoisolatedconcentratestream.21/CO2isnotaddedtoproductwater.Decarbonationnotneeded.GE/\nEDRProductPlatformsEDR产品线22/GE/\nSlideforPublicDistributionMembraneStackAssembly膜堆装配CellPairMembraneStack23/GE/\nSlideforPublicDistributionEDREDRCellPairandStackAssembly24/GE/\nSlideforPublicDistributionEDRStandardProductCapacity标准产品能力EDRCapacityRangeGEProductName20208L3S20206L3S20204L3S20202L3SAQ15AQ10AQ5AQ301,0002,0003,0004,0005,0006,000M3/DProductWater25/GE/\nIntroducingtheNEWEDR2020SlideforPublicDistribution26/GE/\nSlideforPublicDistributionCustomRectifier(old)•Specializedparts•Manualtapswitches•Coursevoltageincrements•Offtheshelfitem,multiplevendorsNewDCDriveCabinet•Finecontrolofvoltages•Programmablesettingsbasedonconditions27/GE/\nEDRDesignGuidelinesEDR设计纲要28/GE/\nSlideforPublicDistributionEDRFeedWater进水FeedTDS200-5,000mg/lisNormalformostapplications5,000–10,000mg/lusingHighSalinitydesign(additionalstacks,largerDCdrives)FeedWaterDesignLimitations•Iron(dissolved)0.3mg/L•Manganese(dissolved)0.1mg/L•H2S0.1mg/L•Aluminum0.1mg/L•COD50mg/LasO2•TOC15mg/L•Oil2.0mg/L(IRmethod)AllowableLevelsContinuousIntermittent•FreeChlorine0.5mg/L30mg/Lcleaning•Turbidity0.5NTU2.0NTU•SDI510-121529/GE/\nSlideforPublicDistributionEDRvs.ROComparison比较Criteria要素EDRROFeedTDS(mg/l)400–5,000approx.100–15,000SaltRemoval脱盐率50–95%90–99%SystemRecovery回收率85–94%50–80%FeedWaterTurbidity进水浊度SDI5<12SDI15<5ContinuousFeedFreeCl2连续游离氯0.5mg/l0mg/l(TFC)OperatingPressure操作压力<50psi>100psiPowerConsumption电力消耗LowerforLowerfor<2,500ppmTDS>2,500ppmTDSTypicalMembraneLife膜寿命10–15years3–5yearsSilicaRemoval硅去除0%90–97%SilicainConcentrate浓水中硅含量Unlimited250mg/l30/GE/\nEDRFeaturesandBenefits特点及价值要点•PolarityReversalallowshighwaterrecovery,andlowchemicalusage•Highwaterrecoveryreducesdemandonscarceresources•Lowconcentratevolumeeasiertodispose•RuggednatureofmembranespermitmoderateSDIs•Tolerancetochlorineresidualcontrolsbiofouling31/GE/\nSlideforPublicDistributionSummary-小结•EDRisvaluablesolutiontosolvebrackishwatersituations.EDR解决浓盐水问题有价值的解决方案•NeedslesspretreatmentthanRO：更少的预处理少•HigherwaterrecoveryhigherthanRO：回收率高•Useslesswater,createslessconcentrate：浓水少•Chlorinetolerantmembranes：耐受游离氯•EDRmembraneslast3xROmembranes：寿命长•Self-cleaningpolarityreversalreduceschemicaluse,cleaningfrequencyandincreaseson-lineavailability.自清洗设置减少化学药剂，增加在线生产有效性32/GE/\nCaseStudies案例分析33/GE/\nEDRforRefineryWWReclaimingnotnewtoday,STANICIndustriaPetroliferaofLivorno(Italy),1988200m3/hrEDRFeedCOD50-100mg/L,88%Recovery34/GE/TDS,1500mg/L,SaltRemovalby92%\nFt.Irwin,USArmy,California,USAReductionofArsenicandFluoride美国陆军-深井水回用到饮用水案例WaterScarcityChallenge•ArsenicandfluoridelevelsexceedingUSEPAdrinkingwaterMaximumContaminantLevels(MCLs)•Aremotedesertlocation•Non-regenerableaquifer•LiquiddisposalchallengesSolutionMetrics•EDRchosenduetosilicatolerance(100mg/l•7MGDEDRfacilitywellwater)andhighwaterrecoveryoperation•EDRdesignedat92%waterrecovery•PilotplantdemonstrationofEDRtoreduce•EDRchosenforchlorineresistanceandarsenicandfluoride.DemonstratedhighlowpretreatmentrequirementwaterrecoveryEDRdesign.•EDRwasteisconcentratedwithRO•FullplantdesignwillincludeEDR,ROandandfalling-filmevaporationtoachievethermalevaporation.99.7%waterrecovery•Facilitycommissioningof2010tomeetUSEPAdirectiveWellEDRFinishedWaterWaterTankSlideforPublicDistributionConcentrateRO35/GE/SofteningFiltrationFalling-filmEvaporationPondEvaporation\nGEWater&ProcessTechnologiesApril,2010INVENT36/GE/\nLocation:Nizhnekamsk,Tatarstan,RussianFederationINVENTCustomer:INVENT+RDI=EPCofficeGEEnergyofficeJobsiteDesigninstitute(RDI)37/GE/\nIntroduction–generalarrangementCONTRACTUALSCOPE:3x16.800m3/dayADF;3x19.200MDFcapacityIndustrialWasteWaterTreatmentplantforNizhnekamskgreenfieldRefinery,consistingofMBRI;MBRII/1andMBRII/2aswellas5pcsofEDRGEEDR2020-8L-4S;2pcsofSWRO-84-35K-PRE-50Hz,CIPdosingsystemsforEDR+ROandchemicals.Fullprocessincl.biology,Basicanddatasupplyengineeringdesign,looseshippedequipmentsupplyfortheentireplant,includingMCC,pneumaticandPLCsupply,38/installationsupervisionandcommissioning.ProjectissplittoPhase1andPhase2.GE/\nTheTANECOGreenFieldOilrefinerysite,indicatingtheInventwaterprojectinGreen.39/GE/\nSlideforPublicDistributionTatneftTanecoRefinery俄罗斯石油Nizhnekamsk,RussiaWaterScarcityChallengePlantPurifiedfor•AdisposalscarcityprojectWastewaterPlantReuse•TreatallrefinerywastewaterMBREDR•Waterwithsolids,hydrocarbons,salts•Reduceplantdischargeflow2,100à45m3/hr•Notzeroliquiddischarge(ZLD),butcloseROConcentratetoDisposalWellSolutionMetrics•EDRselectedtoreduceTDSonMBReffluent•Highwaterrecoverydesign(85–90%)•EDRchosenforchlorineresistance,low•SmallSWROonEDRconcentrate(40%pretreatmentrequirement,andCODtolerancerecovery)•Provenabilitytooperateon20-50mg/lCOD•20,000m3/dayEDRproductwaterrefinerywastewater•CommissioningofPhase12011•BlendEDReffluentwithrawwatertoreducecosts•CombineEDRandSWROforhighwaterrecoverydesigntomeetdisposalconstraint40/GE/\nTanecoMassBalanceFEDR1ProductWaterforPlantUseEDR2ABDEDR3MBREffluentEDRandROProductTankEDR4EDR5RO1CEEDRConcentrateTankRO1ROConcentrateforDisposalABCDEFUnitFlowRatem3/hr7206487236.136.1684.1TDSmg/l1,25020010,7144721,324192ApprovedbyInstituteofNefteChimPererabotkiInstituteofOil-ChemicalProcessinginUfa,Bashkortostan,Russia41/GE/\nGEEDR技术小结•EDR是一种利用直流电场来去除可溶性固体的脱盐技术，主要适用于苦咸水盐度范围。•EDR相对于RO而言，通常要求更少的预处理步骤。•EDR具有的自清洁过程可以有效去除无机沉淀、有机物以及胶体覆着等结垢因素。•与RO相比，GEEDR通常可以大幅度减少阻垢剂及其它化学品的消耗。•GEEDR膜具有良好的耐氯性能，因而适合处理具有较高微生物污染风险的进水。•GEEDR在较高的水回收率下操作，通常为85-94%。42/GE/