CFD技术在水处理紫外消毒中的应用张艳

　　　201129CFD技术在水处理紫外消毒中的应用＊张　艳　李　继(,　518055)　:介绍了紫外消毒在水处理中应用的现状,阐述了计算流体力学(CFD)的基本原理及其应用背景;论述了CFD技术在紫外消毒模型建立方面的关键因素:水力、辐射和剂量模拟;从消毒效率预测和设备结构优化两个方面对CFD技术在水处理紫外消毒中的应用进行了分析,并对其前景进行了展望,提出了今后的研究重点。:紫外消毒;计算流体力学;设备优化;数值模拟APPLICATIONOFCFDTOULTRAVIOLETDISINFECTIONINWATERTREATMENTZhangYan　LiJi(ShenzhenGraduateSchool,HarbinInstituteofTechnology,Shenzhen518055,China)Abstract:ThispaperintroducedtheUVdisinfectioninwatertreatment,thebackgroundandbasicprinciplesofcomputationalfluiddynamics(CFD).KeyfactorstodevelopCFD-basedUVdisinfectionmodelsweredis-cussed,includinghydraulics,UVintensityfield,andUVdose.Theapplicationofthemodelstopredictingdisin-fectionefficiencyandoptimizingUVreactorswerereviewed.Thefocusoffurtherresearchwasdiscussed.Keywords:UVdisinfection;computationalfluiddynamics;optimization;numericalsimulation＊(2008ZX07423-04);(SY200806260019A);(2006BAB17B04,2006BAB17B06)。0　,,,。20036,[1]。20057GB/T19837-2005《》,[2]。,。,,。。、,[3-4]。(ComputationalFluidDy-namics,CFD),,CFD,[5]。,CFD;,CFD,。CFD、。1　CFDCFD,、,,、,。。CFD3:1),,CFD;2),,;3)(),CFD,,,、。1。123DOI:10.13205/j.hjgc.2011.s1.064　　　2011291　CFD2　2.1　流场模拟,。。,。,CFD,。2080,Romero[6],、、,,。Cassano[7]。,CFD。Bass[8]、Do-Quang[9]、Taghipour[10]CFD。Chiu[11]Lyn[12],。Liu[13],:k-ε,k-εRNG,k-ω(88),k-ω(98),RSTTF,、、PIV,,,。[14]k-ε,,。[15],CFD,,CFD。CFD,。,CFD,。,,,CFD,。2.2　光强模拟,,,、。。CFD,,,。,。(PointSource,PS),(Multi-PointSourceSumma-tion,MPSS)、(MultipleSegmentSourceSummation,MSSS)、(LineSourceIntegra-tion,LSI)、(Cylinder)。PS;MPSSn,BoltonDranoff,100%,n=1001。MSSS[16-17],1997Blatchley[18],LSI,,MPSS,,,。Foraboschi,,,[19]。,,,。2.3　当量剂量计算(UVdose)。,,,,,,,,。(ReductionEquivalentDose,RED)124　　　201129,,。,[20]。CFD,CFD(DiscretePhaseModel,DPM)。,,,N-S,。,DPMΔt,I,(I·Δt),,,,。Lyn[21],,,,。UnluturkMunoz[22-23]。CFD,,。3　CFD3.1　消毒效率的预测CFD,Fluent,,,,,。Jin[24]2005,,,。Zora-na[25]XeBr＊,,。Unluturk[22]CFD,,CFD、。3.2　反应器的优化设计,。,。。Zhao[26]90,CFD,。Angelo[27]LUCFD,(PIV)。Chiu[28],,。,,。LimLee[29],。4　,、,CFD。。,,。,CFD,。,PIV(ParticleImagingVelocimetry)、LDV(LaserDopplerVelocimetry),CFD。[1]NWRI&AWWARF.UltravioletDisinfectionGuidelinesforDrink-ingWaterandWaterReuse[M].2ndEdition.NERI.2003:5.[2]GB/T19837-2005　[S].[3]ChoM,KimJH,YoonJ.Investigatingsynergismduringsequen-tialinactivationofbacillussubtilissporeswithseveraldisinfectants[J].WaterResearch,2006,40(15):2911-2920.[4],,,.[J].,2008,24(1):48-50.[5]LawryshynYA,CairnsB.UVdisinfectionofwater:theneedforUVreactorvalidation[J].WaterRecyclingintheMediterraneanRegion,2003,3(4):293-300.[6]Romero,Alfano,Marchetti,etal.Modelingandparametricsensi-tivityofanannularphotoreactorwithcomplexkinetics[J].Chem-isteyEngineeringScience.1983(38):1593-1605.[7]CassanoAE,MartinCA,BrandiRJ,etal.Photoreactoranalysisanddesign:fundamentalsandapplications[J].Industrial&Engi-125　　　201129neeringChemistryResearch,1995,34(7):2155-2201.[8]BassM.LatestadvancesinUVdisinfectionhydrodynamicsimula-tionandrelationtopracticalexperiences[J].ProceedingAquatechAmsterdam,1996,46(4):581-590.[9]Do-QuangZ,DjebbarR,BlatchleyER,etal.Computationalfluiddynamicsmodelingofultravioletdisinfectionreactorperformance:optimizationofflowinverticallampopenchannel[J].Environmen-talEngineeringConferenceEdmontonASCE-CSCE,1997,38(6):71-78.[10]TaghipourF,Sozzi,A.Modelinganddesignofultravioletreactorsfordisinfectionby-productprecursorremoval[J].Desalination,2005,176(1):71-80.[11]ChiuK,LynDA,SavoyeP,etal.IntegratedUVdisinfectionmodelbasedonparticletracking[J].JournalofEnvironmentalEngineeringASCE,1999,125(1):459-466.[12]LynDA,ChiuK,BaltchleyER.NumericalmodelingofflowanddisinfectioninUVdisinfectionchannels[J].JournalofEnviron-mentalEngineeringASCE,1999,125(1):17-23.[13]LiuD,DucosteJJ,JinSS,etal.Evaluationofalternativefluenceratedistributionmodels[J].JournalofWaterSupply:ResearchandTechnologyAQUA,2004.53(6):391-408.[14],,.CFD[J].,2007,2(2):191-206.[15],,.[J].,2008,34(2):16-20.[16]BoltonJR.Calculationofultravioletfluenceratedistributionsinanannularreactor:Significanceofrefractionandreflection[J].WaterResearch,2000,34(13):3315-3324.[17]BlatchleyER.NumericalmodelingofUVintensity:applicationtocollimated-beamreactorsandcontinuous-flowsystems[J].Wa-terReserch,1997,32(7):2205-2218.[18]JanexML,NaceA.UVfluencerateevaluationinaUVsystem:Simulatingtheimpactofoperatinganddesignparameters[J].In-terWaterandIrrigation,2003,23(2):17-20.[19]ElyasiS,TaghipourF.SimulationofUVphotoreactorforwaterdisinfectioninEulerianframework[J].ChemicalEngineeringSci-ence,2006,61(14):4741-4749.[20]CabajA,SommerR,SchoenenD.Biodosimetry:Modelcalcula-tionsforUVwaterdisinfectiondeviceswithregardtodosedistri-butions[J].WaterResearch,1996,30(4):1003-1009.[21]LynDA,BlatchleyER.NumericalcomputationalfluiddynamicsbasedmodelsofultravioletdisinfectionChannels[J].JournalofEnviromentalEngineering,2005,131(6):831-849.[22]UnluturkSK,ArastoopourH,KoutchmaT.ModelingofUVdosedistributioninathin-filmUVreactorforprocessingofapplecider[J].JournalofFoodEngineering,2004,65(1):125-136.[23]MunozA,CraikS,KrestaS.Computationalfluiddynamicsforpredictingperformanceofultravioletdisinfectionsensitivitytopar-ticletrackinginputs[J].JournalofE