电吸附工艺用于焦化废水深度处理的中试

27620146ＲesearchofEnvironmentalSciencesVol．27No．6Jun．2014．J．2014276663-669．XUYongqingZHOUBeihaiZHANGHongtaoetal．Pilotstudyondesalinationofcokewastewaterbyelectro-absorptiontechnologyJ．ＲesearchofEnvironmentalSciences2014276663[e-mail]．*[e-mail]11*2231．1000832．1000833．100083．3680μScm1.2V120Lh30min1530μScm57.8%ρCODCr74.8mgL29.4mgL60.7%．SO42－、Cl－、Ca2+、NH3-NGB50050—2007《》．．1.2V120Lh．X7031001－6929201406－0663－07ADOI10.13198j．issn．1001-6929．2014．06．15PilotStudyonDesalinationofCokeWastewaterbyElectro-AbsorptionTechnologyXUYong-qing1ZHOUBei-hai1ZHANGHong-tao2CHENZhao-lin2PANZheng-dao31．DepartmentofEnvironmentalEngineeringSchoolofCivil＆EnvironmentalEngineeringBeijingUniversityofScienceandTechnologyBeijing100083China2．GuohuanTsinghuaEnvironmentalEngineeringDesign＆ＲesearchInstituteBeijing100083China3．SchoolofEnvironmentTsinghuaUniversityBeijing100083ChinaAbstractＲecentadvancesincokeplantwastewatertreatmentaroundtheworldaresystematicallyintroduced．Consideringtheshortcomingsoftraditionalapproachesnewmethodsandtechnologieshavebeenproposedtotreatcokeplantwastewater．Electro-absorptiontechnologycangreatlyenhancethetreatmentapplicabilityandcapabilityoftheexistingequipment．Inadditionelectro-absorptiontechnologyismoresuitableforwastewatertreatmentofcokeplantsinChina．Theelectro-absorptiontechnologywasusedforadvancedpurificationofcokeplantwastewaterfromShanjiaoinapilot-scalestudy．Experimentalresultsshowedthatundertheconditionsofinfluentaverageconductivity3680μScmelectrodevoltage1.2Vflowrate120Lheffluentaverageconductivity1530μScmanddesalinizationrate57.8%CODCrwasreducedto29.4mgLfrom74.8mgLwithaveragedesalinizationrateof60.7%．Theresultsindicatethatelectro-absorptiontechnologywaswellsuitedforremovalofsulfatechlorideandammonia．Theeffluentwatercanbedirectlyusedtocirculatewater．Themechanismofelectro-absorptionforremovaloforganicmatterwasmainlyphysicalabsorptionusingthechargedplatetoenrichinsteadofdegradetheorganics．Thedesalinationeffectwasbestwhentheoptimumvoltageofelectro-sorbequipmentwas1.2Vandtheoptimumflowratewas120Lh．Keywordselectro-absorptiondesalinationremovaloforganicmatterreclamationandreuse、1-2．、、33-4、、27ρNH3-N、5-7．GB50050—2007《》．8-9、10-12、13-1516．17-1920-23．2090．LawrenceLivermored11.4L24-25CDTSystemsdw0.1%3.785t26SabrexofTexasAndelman20．．27-28293031．．．11.11．1Table1CharacteristicsofthewaterpHμScmρCODCrmgLρNH3-NmgLρCl－mgLρCa2+mgLρSO42－mgLρmgL7～83500～4200≤90≤5560～620200～250700～900≤0.51.21．12、、、、、、1Fig.1Thetestprocessofelectricabsorptiondesalination4666、．．①．．②．．③．．1.32013515—61530d．10d20d．630min、15min30min．1、3、5、7、10、15、20、306〔120Lh1.0、1.11.2V1.2V120、145170Lh〕．ρNH3-N、ρCODCr、ρCa2+、、ρCl－ρSO42－．ρNH3-N32ρCODCr33ρCa2+EDTA34LA-EC20ρCl－35ρSO42－36．22.12.1.11.2V120Lh67d、2．25℃1μScm0.67mgL．27d62.8%56.6%．GB50050—2007≤1600μScm6d．2、Table2Averageconductivitychangedaily－06－0106－0206－0306－0406－0506－0606－07μScm36503520362037703850381036801470151015701560166014601370%59.757.156.658.656.961.662.82．23680μScm1.2V1530μScm57.8%1.01.1V50.2%54.7%1.2V．3．3120Lh56.0%145Lh52.6%170Lh46.0%．2.1.2Cl－、Ca2+、SO42－4Cl－1.2VρCl－571.6mgLV1—1.02—1.13—1.2．2Fig.2Conductivitycurveindifferentvoltageconditions80.5mgL30minρCl－220.8mgLCl－62.3%1.01.1VρCl－268.756627Lh1—1202—1453—170．3Fig.3ConductivitycurveindifferentflowconditionsV1—1.02—1.13—1.2．4Cl－、Ca2+、SO42－Fig.4InfluenceofvoltageonremovalefficiencyofCl－Ca2+SO42－256.1mgLCl－．1.01.1VCa2+30minρCa2+1.2V30minρCa2+112.6mgLCa2+47.0%．SO42－．1.2V120Lh30minρSO42－872.7mgL245.3mgLSO42－71.9%30min37652.2mg．SO42－．2.1.3NH3-N51.2VρNH3-N0.72mgL30minNH3-N61.3%1.01.1VρNH3-N1.040.96mgLNH3-N41.6%47.2%．V1—1.02—1.13—1.2．5NH3-NFig.5Influenceofvoltageonremovalefficiencyofammonia120LhNH3-N6ρNH3-N0.72mgL61.3%145170Lh47.3%40.6%．2.2CODCr71.01.1VCODCr1.2VρCODCr29.4mgL60.7%CODCrCODCr．8120145LhρCODCrCODCr6666Lh1—1202—1453—170．6NH3-NFig.6InfluenceofflowonremovalefficiencyofammoniaV1—1.02—1.13—1.2．7CODCrFig.7InfluenceofvoltageonremovalefficiencyofCODCr170LhCODCr．ρCODCr30mgLGB50050—2007．Lh1—1202—1453—170．8CODCrFig.8InfluenceofflowonremovalefficiencyofCODCr33.1CODCrCODCr．、GC-MS－CODCr、、、、、24--6-CODCr、、、24--6-．、、N．．Mint=Cing×Qing+Cinz×QinzMoutt=Coutg×Qoutg+Coutz×QoutzMintCODCrmgCingρCODCrmgLCinzρCODCrmgLQingLQinzLMouttCODCrmgCoutgρCODCrmgLCoutzρCODCrmgLQoutgLQoutzL．1.2V120Lh180Lh30min30minρCODCrρCODCr3．3ρCODCrTable3TherawdataoftheconductivityandCODCrμScmρCODCrmgLLh398078.3120175034.0398078.31806610112.825℃1μScm0.67mgL399.9g405.6g1.4%CODCr11.8g12.2g3.3%．CODCr5%．CODCr76627．N37．3.2．12．1.0V120Lh180Lh9．．91.0VFig.9Thechangesofoperatingcurrentinthecaseof1.0Vvoltage95min．930min120.1160.094kW·h1t1.921.56kW·ht3.48kW·ht．2120Lh55m30min30min1t20.40kW·h．1.0V3.88kW·ht．1.11.2V5.006.28kW·ht．．．3.3．1.2V120Lh120Lh30min30min447d10．10Fig.10Thechangesofwaterproductionrate1075%．4a、、Cl－、SO42－、Ca2+、NH3-N．b1.2V120Lh57.8%60.7%．c．Ｒeferences1．J．200225616-26．2VAZQUEZIMAＲANONEＲODＲIGUEZ-IGIESIASJetal．Ｒemovalofresidualphenolsfro