低频电磁场处理中水的静态阻垢缓蚀试验研究

44620096IronandSteelVo.l44,No.6June2009迟金宝1,张雪峰2,苍大强1,赵民3,常瑞卿3(1.,100083;2.,014010;3.,014010):,,21.46%,1231%;,2.0h35.30%,17.50%SEMXRD,,Fe2O3,:;;;;:X756;X123:A:0449749X(2009)06008905ExperimentalResearchonStaticScaleandCorrosionInhibitionUsingLowFrequencyElectromagneticTreatmentofReclaimedWaterCHIJinbao1,ZHANGXuefeng2,CANGDaqiang1,ZHAOMin3,CHANGRuiqing3(1.DepartmentofEnvironmentalEngineering,UniversityofScienceandTechnologyBeijing,Beijing100083,China;2.SchoolofMathematicsandPhysics,InnerMongoliaUniversityofScienceandTechnology,Baotou014010,NeiMonggo,lChina;3.Technologycenter,BaotouIronandSteelGroupCo.,Baotou014010,NeiMonggo,lChina)Abstract:Accordingtoscalingandcorrosionproblemsduringoperationprocessofcirculatingcoolingwater,staticwaterqualitystabilizationexperimentwasconductedontreatmentreclaimedwaterwithlowfrequencygradientelectromagneticfield.Afteroptimizingtheelectromagneticoperationparametersbyorthogonalexperiment,thescaleinhibitingratecameto21.46%andthecorrosioninhibitioncameto12.31%underdisposableelectromagnetictreatment.Thesetwovaluescouldbeimprovedto35.30%and17.50%respectively,aftermultiplecirculatingelectromagnetictreatmentsfor2.0h.ByusingSEM(ScanningElectronicMicroscope)andXRD(XRayDiffraction),electromagnetictreatmentcouldchangestructuralmorphologyofCaCO3crysta,lpromoteformattingofcompactFe2O3oxidefilmonironsurface,whichisagainstcorrosion.Keywords:reclaimedwater;circulatingcoolingwater;magneticwatertreatment;scaleinhibition;corrosioninhibition:(2007Z1009):(1981),,;Email:chijinbao@gmai.lcom;:20080724,9%,853%,,,,,,,,[1~5],,,,,,441材料与方法1.111,(a),400mm,,(1),;(b),,(a);(b)1Fig.1ExperimentaldeviceandtreatmentprocessBac=250I0cos(2ft+)(1),Bac,10-4T;I0,A;f,Hz;,rad1.21.2.1L9(34),,,,()1.2.2,1000mL2000mL,(801),,,(801)10h,Ca2+,(2)=C1-C2C0N-C1100%(2),,%;C1Ca2+,mg/L;C2Ca2+,mg/L;C0Ca2+,mg/L;N1.2.3GB/T181752000,X:(401),72h,110r/min;GB201.3:HHSY21Ni8c1011SRCCIIFA2004N:FEIQuanta400;ZEISSEVO50HV;PHILIPSPw1700,CuX1.4,11Table1ExperimentalwaterqualityanalysisdatamgL-1pH8.13Ca2+73.26F-5.35Mg2+48.81SS55.23Cl-246.92CODCr62.16SO42-362.15(CaCO3)386.5125.62(CaCO3)114.641425.602结果与分析2.1L9(34)22,,,9,10%;,,,906:2Table2EffectofelectromagnetictreatmentbyorthogonalexperimentonscaleandcorrosioninhibitionratesA(/10-4T)B(/Hz)C(/(ms-1))D(/%)/%%11(250)1(25)1(0.472)1(0)13.53-0.73212(35)2(0.707)2(3)12.310.83313(45)3(0.943)3(6)14.454.7842(750)12318.507.235223116.913.326231220.148.7973(1250)13211.42-3.098321312.19-0.809332117.090.36K140.2843.4445.8647.54K255.5641.4147.9043.87K340.7051.6842.7845.13R15.2810.275.123.67A2B3C2D1K14.883.417.262.95K219.343.358.426.53K3-3.5313.935.0111.21R22.8710.583.418.26A2B3D3C22,,,:A2B3C2D1;,,:A2B3D3C22.230L,,0,051.01.52.0h5L,,5L,22Fig.2Effectofcirculatingtreatmenttimeonscaleandcorrosioninhibitionrates2,,0,21.46%12.31%,6,,2h,35.30%,17.50%,2.3,3CaCO3(a)(b),,CaCO3CaCO3,CaCO32.4XRD,A2B3D3C2,XRD,44,3:FeO(OH)(Ca,Mg)CO3Fe2O3XRD,(Ca,Mg)CO3FeO(OH),(Ca,Mg)CO3100%22.0%,FeO(OH)26.8%15.5%,Fe2O39144(a);(b)6;(c);(d)63Fig.3Analysesofinhibitingscaleexperiment,SEMandEDX4XRDFig.4XRDanalysisofthefoulingofinhibitingcorrosionexperiment,44.5%100%,Fe2O33讨论3.1,,[6]3,,,,,[7],,,80202080[1]3Table3MainthermodynamicparametersofcalciteandaragoniteKspHf/(kJmol-1)Gf/(kJmol-1)S/(kJmol-1K-1)4.510-9-1207.68-1129.5188.766.010-9-1207.85-1128.47134.81,:,,Ca2+,3Ksp;,,,,3.2[8,9],(),,,926:,Fe2O3nH2OFeO(OH),Fe2O3Fe2O3Fe2O3Fe2O3,,Fe2O3nH2O,Fe2O3,,5,,,,XRD,Fe2O3,,Fe2O3,Fe2O3,(a);(b)5Fe2O3Fig.5TetartoidalconstructionofFe2O3crystal4结论(1),A2B3C2D1;,A2B3C2D1(2),,21.46%,12.31%;20h,35.30%,17.50%(3),Ca2+,;Fe2O3,:[1]DonaldsonJD,GrimesS.LiftingtheScalesFromOurPipes[J].NewScientist,1988,117(18):43.[2],,.[J].,2002,23(5):185.(LZhanpeng,HUANGDelun,YANGWu.MagneticFieldInducedVariationofOpenCircuitStateofIroninChlorideSolutions[J].CorrosionandProtection,2002,23(5):185.)[3]LiM,QuJH,PengYZ.SterilizationofEscherichiaColiCellsbytheApplicationofPulsedMagneticField[J].JournalofEnvironmentalSciences,2004,16(2):348.[4],,,.[J].,2006,18(7):59.(ZHANGXuefeng,LIUGuanyuan,CANGDaqiang,eta.lWastewaterTreatmentinHotSteelRollingMillWithHighGradientMagneticFieldTechnology[J].JournalofIronandSteelResearch,2006,18(7):59.)[5],,,.[J].,2006,41(9):82.(ZHANGXuefeng,LIUGuanyuan,CANGDaqiang,eta.lMechanismofHighGradientMagneticTreatmentofCirculatingCoolingWater[J].IronandStee,l2006,41(9):82.)[6].[M].:,1985.[7]WakitoH,KinoshitaS.GrowthofTinyCalciteSingleCrystalsinanAqueousSolution[J].JournalofCrystalGrowth,1985,71(3):807.[8]RameshS,RajeswariS,MaruthamuthuS.EffectofInhibitorsandBiocideonCorrosionControlofMildSteelinNaturalAqueousEnvironment[J].MaterialsLetters,2003,57(2):4547.[9]QuraishiMA,JamalD.DianilsasNewandEffectiveCorrosionInhibitorsforMildSteelinAcidicSolutions[J].MaterialsChemistryandPhysics,2003,78(3):608.93