高盐废水制取高纯水工艺研究李福勤

、[1-3]。、、。。RORO75%25%[4-5]。MDRO[6-8]MDMDMD100%。MD。EDI、、[9]。EDI2ROEDI[10]。2RO-EDIMD-EDI。11.1RO1470mg/L3310μS/cmTOC9.5mg/LpH7.922℃。1.2RO、RORO3。50μm5μm、RO、ROTW30-1812-75。MDPVDF0.80mm23cm0.18μm85%0.057m2。。SHZ-、BT00-100M、DK-S24。EDI6mm、×1212221.3003872.0560382RO+EDIMD+EDI。3310μS/cm2RO6.5～7.3μS/cm99.78%MD2.6～3.7μS/cm99.89%EDIEDI0.077～0.083μS/cm。2RO+EDI60%MD+EDI90%。MD+EDI。TQ028.8A1000-3770(2013)09-0109-0032013-03-1221176188211061002011120111000411215116D1966－、[e-mail]39920139TECHNOLOGYOFWATERTREATMENTVol.39No.9Sep.,2013109DOI:10.16796/j.cnki.1000-3770.2013.09.0304MDMD-EDIFig.4FluctuationoftheeffluentofMDandMD-EDI010203040506070800.000.050.102340.00.20.40.60.81.0t/h

γ/(μS·cm-1)ρ/(mg·L-1)γ295mm×50mm225mm×20mm2mm1mm001×4201×4213361-BW3362-BW13660mmJWY-30G。22RO-EDI1MD-EDI2。22.12RO-EDIRO0.8MPa、25、45L/hRO60%。RO80～91μS/cm97.3%8～9mg/Lρ(CaCO3)TOC0.45～0.57mg/LEDI＜30μS/cm＜1mg/LTOC＜1mg/L。RO0.8MPa、30、40L/hEDI、9.5、2.3L/h15V31.8mA/cm2。RO、EDI3。3RO6.5～7.3μS/cm92%0.32～0.43mg/LTOC0.18～0.25mg/LEDI。2RO99.78%。EDI0.079～0.083μS/cm。2.2MD-EDIMD75℃14.5L/h90kPa1593%13.5L/(m2·h)EDI。MDEDI4。4MD2.6～3.7μS/cm99.89%0.054～0.085mg/LTOC0.78～0.89mg/LEDI。EDI0.077～0.081μS/cm。2.3212ROMDEDIEDI。2ROTOCMDMD。22RO+EDI。3310μS/cm60%MD+EDI100%93%12RO-EDIFig.1FlowchartofRO-EDIexperiment2MD-EDIFig.2FlowchartofMD-EDIexperiment3RORO-EDIFig.3FluctuationoftheeffluentofRO-ROandRO-EDI051015202530350.00.10.23456780.00.10.20.30.40.5
t/h
γ/(μS·cm-1)ρ/(mg·L-1)γρ(TOC)110THEPROCESSSTUDYONTHEHIGH-PURITYWATERPREPAREDBYHIGHSALINITYWASTEWATERLiFuqin1,2,LvXiaolong1,TangWeiyuan2,NieWenhuan2,ZhaoHui2(1.InstituteofBiologyandChemistryEngineering,TianjinPolytechnicUniversity,Tianjin300387,China;2.CollegeofUrbanConstruction,HebeiUniversityofEngineering,Handan056038,China)Abstract:Basedonhigh-puritywaterpreparedbyhighsalinitywastewater,twoprocessesincludingtwosetofreverseosmosis+electricdeionization(RO-RO-EDI)andmembranedistillation+electricdeionization(MD-EDI)hadbeenstudiedinthispaper.Theresultsindicatedthat:theelectricconductivityofrawwaterwas3310μS/cm.TheeffluentofRO-ROwas6.5～7.3μS/cmandthesalteliminationwas99.78%,whiletheconductivityofeffluentofMDis2.6～3.7μS/cmandsaltrejectionwas99.89%.BothoftheeffluentqualitycouldmeettherequirementoftheinfluentwaterqualityofEDIandtheelectroconductivityoftheireffluentstayed0.077～0.083μS/cm,whichareclose.ThetechniqueofRO-RO-EDIhadbeenmaturewithlowerenergyexpenditure,however,itisaffectedbythesalinityofrawwaterandtherateofrecoveryislow(60%).ComparedwithRO-RO-EDI,thesalinityofrawwaterhadlaterinfluenceontheprocessofMD-EDI,whichobtainedhighrecover(90%),butthemembranefluxislowerwhichrequiresmoreresearch.Inaddition,withthedevelopmentofmembranedistillation,thetechniqueofMD-EDIwaspointedoutasbetterandpromising.Keywords:highsalinitywastewater;high-puritywater;reverseosmosis(RO);membranedistillation(MD);electricdeionization(EDI)。MD。322RO+EDIROMD+EDIMD[11-12]。MD[13]。MD+EDI。33310μS/cm2ROMDEDIEDI0.077～0.083μS/cm。2RO+EDIMD+EDI。MD+EDIMD。[1].[M].:,2000:651-672.[2],.[M].:,1997:3-11.[3],,,.[M].:,2008:42-52.[4].[M].:,2004:261-267.[5],,,.RO[J].,2007,23(19):1-5.[6].[J].,2003,23(4):67-79.[7].[J].,2010,30(3):1-10.[8],,.[J].,2007,26(2):168-172.[9].[J].,2006,26(7):4-6.[10].[M].:,2006:276-279.[11],,.[J].,2010,30(5):23-26.[12],,,.[J].,2007,33(10):14-17.[13].[J].,2011,31(3):96-100.。μμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμμ111