CFD在气升式MBR中的模型建立及计算研究

InternationalJournalofFluidDynamics流体动力学流体动力学,2019,7(1),23-30PublishedOnlineMarch2019inHans.http://www.hanspub.org/journal/ijfdhttps://doi.org/10.12677/ijfd.2019.71003文章引用文章引用:秦煜炜,李春青,张桂玲,王韬,王海涛.CFD在气升式MBR中的模型建立及计算研究[J].流体动力学,2019,7(1):23-30.DOI:10.12677/ijfd.2019.71003ModelEstablishmentandComputingResearchofCFDinAirliftMBRYuweiQin1,ChunqingLi1,GuilingZhang1,TaoWang2,HaitaoWang21SchoolofComputerScienceandSoftware,TianjinPolytechnicUniversity,Tianjin2SchoolofEnvironmentalandChemicalEngineering,TianjinPolytechnicUniversity,TianjinReceived:Jan.7th,2019;accepted:Jan.21st,2019;published:Jan.29th,2019AbstractMembraneBioreactor(MBR)isawaste-watertreatmentandrecoverytechnologythatcombinesbiodegradationwithefficientmembraneseparationtechnology.Inactualproductionprocess,membranefoulingwillcausemembranepermeabilityandseparableirreversiblechanges.Inthispaper,thecalculationmodelofliquidflowinairliftMBRaerationprocessisconstructedbyCom-putationalFluidDynamics.Aftertesting,themodelresultsinconvergence.ThenthismodelwasusedtostudytheeffectofthebaffleofairliftedMBRontheliquidandmembraneshearforceinthemembranemodule.TheflowdiagramandtheshearforceclouddiagramofthetwodifferentmembranemoduleconfigurationsofthestandardMBRandtheairliftMBRwerecalculatedbyFLUENTsoftware.ItwasfoundthatthebaffleofairliftMBRhasacceleratedliquidcirculationandimprovedaverageshearofthemembranesurface.ThebaffleoftheairliftMBRcausestheliquidinthemembranemoduletocirculatearoundthemembranemodule,andthecirculatingliquidnotonlyincreasestheflowrateoftheliquidinthemembranemodule,butalsoformsalargeradiusvortexzoneonbothsidesofthemembranemodule.Theaverageshearforceineachareaofthemembranesurfaceissignificantlyimproved.ThismakestheairliftMBRhaveadvantagesthatarenotavailableinthestandardMBRinmitigatingmembranefoulingandimprovingaerationeffi-ciency.KeywordsMembraneFouling,AirliftMBR,CFD,ShearForceCFD在气升式在气升式MBR中的中的模型建立模型建立及计算计算研究研究秦煜炜秦煜炜1，李春青，李春青1，张桂玲，张桂玲1，王，王韬2，王海涛，王海涛21天津工业大学计算机科学与软件学院，天津2天津工业大学环境与化学工程学院，天津秦煜炜等DOI:10.12677/ij