CaO改善印染污泥干化效果的微观研究

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0、,、、,H2S,。,[1]~[3](、、),。,20130.32t(80%),50.8%。,。、、,[4]~[8]。80%,、,。,。,。[9]、[10],。[11],,。,CaOCaCO3。,,,,,。CaO,[12]。,,[13]~[15],CaO。11.1,77.5%。1。CaO()0∶1,1∶10,1∶12.5,1∶20,1∶50,1∶100(CaO/0,100,80,50,20,10g/kg)10mm(),160℃[16],。:2015-07-10。:(“973”)(2011CB201501);(2012B091000166)。:(1964-),,,,、。E-mail:epxqma@scut.edu.cnCaO,,,,,((),510640):CaO,CaO。,CaO/0~20g/kg,CaO;80~100g/kg,CaO;20~80g/kg,CaO。CaO。CaO/0~20g/kg80~100g/kg,CaO;20~80g/kg,CaO,CaO。:CaO;;;;:TK6;X796:A:1671-5292(2016)03-0462-07RenewableEnergyResources34320163Vol.34No.3Mar.2016·462·DOI:10.13941/j.cnki.21-1469/tk.2016.03.022[17]MR=(mt-me)/(m0-me)(1):MR,%;m0,g/g;me,g/g;mt,g/g。mem0mt,,(1)[18]MR=mt/m0(2)DR(g·g-1·min-1),DR=(m(t+Δt)-mt)/Δt(3):m(t+Δt)(t+Δt),g/g。,[19],a=(w1-wi)/(w1-w2)(4):w1,kg;wii,kg;w2,kg。,,(Arrhenius):da/dt=D0exp(Ea/RT)f(a)(5)g(a)=a0乙da/f(a),,g(a)=a0乙D0exp(Ea/RT)dt=kt(6):D0;Ea,kJ/mol;R,J/(mol·k);k;t,min;T,K。1.2CaO()0∶1,1∶10,1∶12.5,1∶20,1∶50,1∶100。,。-30℃,1h,,,,,,。[20],4,。,,,3,,。4[21](),、、。,。,Matlab0,1。,S(t)t1;,Null(t)1。t。,Null(t),。1000,1000,。,t:S(t)∝tdD/2(7):dD[22],,,,。1Fig.1Experimentalset-up·463·,CaO22.12CaO。2,60%CaO,。CaO,。CaOm(CaO)∶m()=1∶100,,18.2%。,1∶101∶12.51∶501∶201∶100。3CaO,,CaO。3,CaO0.25~2.0kg/kg。,CaO,。0~0.25kg/kg,,。,CaO,。atg(a)。,[23],g(a),g(a)~t,k。160℃m(CaO)∶m()=1∶20,1。1,R2=0.99711,RSS=0.02369,。。4(a)~(f)g(a)CaOat。,g(a)0.8,0.8。,80%。2CaOFig.2EffectofCaOadditiononweightlossofsludge0306090120150/min020406080100MR/%m(CaO)∶m()=1∶100m(CaO)∶m()=1∶20m(CaO)∶m()=1∶12.5m(CaO)∶m()=1∶10m(CaO)∶m()=1∶503CaOFig.3EffectofCaOadditionondryingrateofsludge0.0/kg00.02DR/g·(g·min)-1m(CaO)∶m()=1∶100m(CaO)∶m()=1∶20m(CaO)∶m()=1∶12.5m(CaO)∶m()=1∶10m(CaO)∶m()=1∶500.51.01.52.02.53.03.50.040.060.081Table1FittingCurveofdifferentmechanismfunctiong(a)a2(1-a)ln(1-a)+a[1-(1-a)1/3]2(1-2a/3)-(1-a)2/31-(1-a)1/21-(1-a)1/3[-ln(1-a)]1/2[-ln(1-a)]1/3R20.98860.968550.78160.933830.997110.967480.953280.96018RSS0.135510.338051.149350.068390.023690.212781.743920.65552(a)0204060100120/min800.00.20.40.60.81.0g(a)y=0.00798x+0.01668(b)m(CaO)∶m()=100∶1020406010080/min0.00.20.40.60.81.0g(a)-0.2y=0.01136x-0.004207(c)m(CaO)∶m()=80∶1020406010080/min0.00.20.40.60.81.0g(a)-0.2y=0.0112x-0.04397·464·2016,34(3)5CaO0.25~2.0kg/kg。5,CaO0~20g/kg,CaO;80~100g/kg,CaO。CaO。CaO,,:CaO+H2O→Ca(OH)2():Ca(OH)2→Ca2++2(OH)-()Ca2+,,[24]。CaO,()(),。CaO,(),(),。,CaO/20~80g/kg,CaO,()()。2.26,7,CaO6Fig.6Electronmicroscopescanningofsludge020406080100CaO/gCaO·(kg)-10.00750.00800.00850.00900.00950.01000.01050.01100.0115k0.0100.0150.0200.0250.0300.0350.040/kg·(min·kgDS)-14CaOg(a)~tFig.4g(a)~tfittingcurveofsludgewithdifferentadditionofCaO(f)m(CaO)∶m()=10∶1020406010080/min0.00.20.40.60.81.0g(a)y=0.00947x+0.00308(d)m(CaO)∶m()=50∶10204060100/min80y=0.0101x-0.035630.00.20.40.60.81.0g(a)-0.2/min(e)m(CaO)∶m()=20∶10204060100800.00.20.40.60.81.0g(a)-0.2y=0.01028x-0.022945CaOFig.5EffectofCaOadditionondryingratem(CaO)∶m()=1∶50m(CaO)∶m()=1∶10m(CaO)∶m()=1∶12.5·465·,CaO9CaO。9,,CaO/20~80g/kg,CaO,。5,9,CaO/0~20g/kg80~100g/kg,CaO。,CaO,CaO,CaO/0~20g/kg。3①CaO。CaO/0~20g/kg,CaO,10g/kg18.2%。CaO/80~100g/kg,CaO;80~100g/kg,CaO。②CaO020406080100CaO/gCaO·(kg)-10.900.951.001.051.101.151.20dD8CaOFig.8SpectraldimensionofdirectionalrandomwalkofsludgewithdifferentadditionofCaOm(CaO)∶m()=1∶20m(CaO)∶m()=1∶50m(CaO)∶m()=1∶1007CaOFig.7PorestructureofsludgewithdifferentadditionofCaO。CaO,。,CaO。7,8ln(S(t))ln(t),2。(c)m(CaO)∶m()=80∶1y=0.54323x+1.8051(a)5678109y=0.47733x+2.51065.56.06.57.07.55.0(b)m(CaO)∶m()=100∶1y=0.56177x+2.4182ln(S(t))ln(t)56781095.56.06.57.07.55.0ln(S(t))ln(t)8.056781095.56.06.57.05.0ln(S(t))ln(t)4.5(f)m(CaO)∶m()=10∶1y=0.47713x+1.935678109y=0.48124x+2.74065.56.06.57.07.55.0(e)m(CaO)∶m()=20∶1y=0.50856x+2.822ln(S(t))ln(t)56781095.56.06.57.07.5ln(S(t))ln(t)8.056781095.56.06.55.0ln(S(t))ln(t)4.5(d)m(CaO)∶m()=50∶19CaOFig.9TrendchartofspectraldimensionofdirectionalrandomwalkwithdifferentadditionofCaO·466·2016,34(3),CaO。③CaO/0~20g/kg80~100g/kg,CaO;20~80g/kg,CaO,CaO。:[1],,,.[J].,2011,39(2):155-160.[1]LiGuojian,HuYanjun,ChenGuanyi,etal.Transferringcharacteristicsofheavymetalsduringco-incinerationofmunicipalsewagesludgeandsolidwaste[J].JournalofFuelChemistryandTechnology,2011,39(2):155-160.[2],,.[J].,2008(14):55-60.[2]WuChengjun,DuanYufeng,ZhaoChangsui.Adsorptioncharacterizationofmercurybyflyashesduringco-combustionofsludgeandcoal[J].ProceedingsoftheCSEE,2008(14):55-60.[3],,,.[J].,2007,27(2):64-68.[3]YaoHong,LuoGuangqian,XuMinghou,etal.Studyonbehaviorsofmercuryemissionduringcombustion/gasificationprocessesofcoalandsludges[J].ProceedingsoftheCSEE,2007,27(2):64-68.[4],,,.[J].,2011(1):52-56,61.[4]QinCuijuan,LiHongjun,ZhongXuejin,etal.Comparisonandanalysisofdomesticsludgeincinerationtechnology[J].EnergyEngineering,2011(1):52-56,61.[5],,,.[J].,2007(17):44-50.[5]WangYuming,HuJianhong,RanJingyu,etal.Experimentalstudyoncombustionandkineticcharacteristicsofmixedindustrialsludge[J].ProceedingsoftheCSEE,2007(17):44-50.[6],,,.[J].,2010(35):1-6.[6]LiYunyu,LvQinggang,ZhuJianguo,etal.Coldtestsondryingandincinerationintegrationtechnologyofsewagesludgeinacirculatingfluidi

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