正渗透-纳滤耦合处理苦咸水脱盐工艺-时强

WATERPURIFICATIONTECHNOLOGYVol.31,No.5,2012October25th,2012201231525-2858WaterPurificationTechnology[]2012-01-05[]No.200905017-1[]1986-。[e-mail]。[][e-mail]。forwardosmosisFO[1,2]。。nanofiltrationNF[3]、[4,5][6]。C.H.Tan[7]S.Zhao[8]、。—Winflows3.0.230g／L。11—1.2660422.3001922000mg／L。30g／L60g／L500mg／L。TQ028.8B1009-0177201205-0025-05TechnologicalProcessesofDesalinationTreatmentforBrackishWaterwithCoupledForwardOsmosis-NanofiltrationSystemShiQiang1,ZhangQian2,RuanGuoling2,ChuXizhang2(1.KeyLaboratoryofEco-ChemicalEngineering,MinistryofEducation,CollegeofChemistryandMolecularEngineering,QingdaoUniversityofScienceandTechnology,Qingdao266042,China;2.TheInstituteofSeawaterDesalinationandMultipurposeUtilization,SOA(Tianjin),Tianjin300192,China)AbstractSimulating2000mg／LNaClasbrackishwater,usingdivalentsalt(Na2SO4,MgSO4,MgCl2andtheirmixturesolution)asdrawsolution,thewaterfluxofforwardosmosis(FO)forbrackishwaterdesalinationwasinvestigated.Thenanofiltration(NF)performancefortherecoveryofdrawsolutionwasdeterminedbysoftwareandexperiment,andadualNFprocesswasdesignedfortherecoveryofdiluteddrawsolution.ResultsshowthatthewaterfluxofMgSO4inFOprocessislowest,andthatofMgCl2ishighest.ItisoppositeinNFprocessthattheNFperformanceofMgSO4isbest,andthatofMgCl2isworst.WhenthediluteddrawsolutionofNa2SO4is30g／L,itcouldbeconcentratedtotheinitialconcentration(60g／L)byadualstageNFprocess,andthepermeateTDSislowerthan500mg／L.Keywordsforwardosmosis(FO)brackishwaterdesalinationnanofiltration(NF)drawsolutionrecovery25--Vol.31,No.5,2012。GESEPA。HydrationTechnologyInnovationsHTISEPACFTFThinFilmROHLGEInfrastructureWater&ProcessTechn-ologiesGESEPAGEInfrastructureWater&ProcessTechnologiesCP2202SDDS-308AB7080093T6VaporPressureOsmometer5520WESCORVAPOR。2000mg／L60g／L、、-、-3∶11∶11∶3。30g／L-1∶1。40L／h0.67L／min。GEWinflows3.0.2HL2540FM。15%。-。-GB／T15452-2009、———EDTADL／T502.11-200611。2160g／L。3.05L／m2·h8.56L／m2·h。-840kPa1160kPa1507kPa1.381.791.031.13ICP。230g／L45g／L。30g／L1.16～2.80MPa1260.82～1659.38mg／L45g／L30%～40%40%。TDSTDS1Fig.1SchemeoftheLab-ScaleForwardOsmosiEquipment.—26--WATERPURIFICATIONTECHNOLOGYVol.31,No.5,2012October25th,20121不同组成汲取液正渗透水通量Tab.1WaterFluxofDifferentDrawSolutionsinForwardOsmosiskPakPa／L·m-2·h-1Na2SO4MgSO4MgCl2MgSO4+Na2SO4MgSO4+Na2SO4MgSO4+Na2SO4MgSO4+MgCl2MgSO4+MgCl2MgSO4+MgCl23∶11∶11∶33∶11∶11∶32084725390711101430177715152236309818144353617840116015071240195028205.293.058.564.184.324.733.215.567.66。MgSO4+MgCl21∶113%45g／LMgCl2MgSO4+MgCl21∶33。45g／LMgSO4+MgCl21∶1500mg／LTDS500mg／L。5bar。30g／L-1∶11100kPa4.18L／m2·h。2.3.122。。10bar85%20bar96.4%。-10bar15bar。10bar59.7%10bar90%10bar2不同汲取液一级纳滤性能Tab.1NFPerformanceofDifferentDrawSolutionsinStage1／g·L-1／MPaTDS／mg·L-1Na2SO4MgSO4MgCl2Na2SO4+MgSO4Na2SO4+MgSO4Na2SO4+MgSO4MgSO4+MgCl2MgSO4+MgCl2MgSO4+MgCl2Na2SO4MgSO4MgCl2Na2SO4+MgSO4Na2SO4+MgSO4Na2SO4+MgSO4MgSO4+MgCl2MgSO4+MgCl2MgSO4+MgCl23∶11∶11∶33∶11∶11∶33∶11∶11∶33∶11∶11∶33030303030303030304545454545454545451.751.162.801.591.441.291.592.042.492.401.60-2.171.961.772.222.86-1362.021306.91659.381260.821273.841287.761562.181517.001574.891911.551981.19-1910.841929.811958.292280.432539.37-3不同汲取液二级纳滤性能Tab.3NFPerformanceofDifferentDrawSolutionsinStage2／g·L-1／MPaTDS／mg·L-1Na2SO4MgSO4MgCl2Na2SO4+MgSO4Na2SO4+MgSO4Na2SO4+MgSO4MgSO4+MgCl2MgSO4+MgCl2MgSO4+MgCl2Na2SO4MgSO4Na2SO4+MgSO4Na2SO4+MgSO4Na2SO4+MgSO4MgSO4+MgCl2MgSO4+MgCl23∶11∶11∶33∶11∶11∶33∶11∶11∶33∶11∶1303030303030303030454545454545450.380.350.410.370.360.360.370.380.380.410.380.400.390.380.400.42113.9956.16424.2152.6453.7254.83307.64337.06366.8894.3884.9580.8381.2288.83174.7556.1327--Vol.31,No.5,201273.3%。330g／L-、。--。10bar15L／m2·h20bar60L／m2·h。1015bar4.96g／L1.94g／L。-TDS＜500mg／L。2.3.242g／L5g／L15bar10bar。。5g／L4bar20L／m2·h500mg／L2g／L8bar90L／m2·h100mg／L。-15bar3.58g／L4bar170.29mg／L26.38L／m2·h8bar59.88L／m2·h。30g／L、30g／L-。-。（下转第58页）2Fig.2RejectionofDifferentDrawSolutionsandOperatePressuresinStage11009080706050／%510152025／barMg2+SO42-Cl-Na2SO4MgSO4+MgCl29075604530150／L·m-2·h-11086420／g·L-1510152025／bar&&Na2SO4MgSO4+MgCl23Fig.3PermeateFluxandConcentrationofDifferentDrawSolutionsandOperatePressuresinStage14Fig.4PermeateFluxandConcentrationofDifferentDrawSolutionsandOperatePressuresinStage29075604530150／L·m-2·h-10.50.40.30.20.10.0／g·L-124681012／bar&&2g／L5g／L.—28--Vol.31,No.5,2012（上接第28页）HL2540FM182∶168.2m3／d50%。430g／LFO-。3160g／L、-1∶1。230g／L、、TDS500mg／L。3-1∶1。430g／L60g／L-。1,,,.-[J].,2008,34(2):1-4.2CathTY,ChildressAE,ElimelechM.Forwardosmosis:Principles,applications,andrecentdevelopments[J].JournalofMembraneScience,2006,281:70-87.3,,.[J].,2004,30(6):352-355.4,,.[J].,2009,29(9):15-18.5,.[J].,2004,30(4):196-195.6,,.[J].,2009,28(5):1-5.7TanCH,NgHY.Anovelhybridforwardosmosis-nanofiltration(FO-NF)processforseawaterdesalination:Drawsolutionselectionandsystemconfiguration[J].DesalinationandWaterTreatment,2010,13:356-361.8ZhaoS,ZouL,MulcahyD.Brackishwaterdesalinationbyahybridforwardosmosis-nanofiltrationsystemusingdivalentdrawsolute[J].Desalination,2012,284(4):175-181.4二级纳滤回收30g／L硫酸钠汲取液性能Tab.4N