城市污水厂污泥衍生燃料成型的研究

2008,28(10)904~909ChinaEnvironmentalScience*,,,(,100084).,.33%~58%,20%80%;30%~47%,,20%~40%.,,,;,,.,.,,.4%.X705A10006923(2008)10090406Studyonthegranulatingcharacteristicsofsewagesludgederivedfuel.JIANGJian-guo*,DUXue-juan,YANGShi-hui,ZHANGYan(DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China).ChinaEnvironmentalScience,2008,28(10)904~909AbstractTheinfluenceofinitialwatercontent,combustionadjuvant,andcoalashongranulatingcharacteristicsofsewagesludgederivedfuelwasstudied.Theoptimummoistureofmixturesweredifferentusingvariouscombustionadjuvants,whichwas33%~58%forsawdust,withgranulatingproportionrisingfrom20%to60%,andwas30%~47%forcoal,withgranulatingproportionrisingfrom20%to40%.Whenincreasingcombustionadjuvantratio,thecompressivestrengthofsamplesdecreasedforsawdustbutincreasedforcoal.Thegranulatingcharacteristicsofsampleswithsawdustinitwerebetterthanthosewithcoal.Addingcoalashwasfavorabletoincreasegranulatingproportionbutreducedthecompressivestrength.Theoptimumratioofcoalashwas4%.Keywordssewagesludgesludgederivedfuelgranulatingcharacteristics,.,[14].,.,,,,,.[5][6][78].Dospoy[9].,,,.(),,,50%[10].,[1115].,,.2,.11.1.,20080317*,,[e-mail]10905..1.KP120.ZWICKZ005.1Table1Resultsofproximateanalysisandultimateanalysisofmaterials(%)(%)(%)(%)(kJ/kg)C(%)H(%)O(%)N(%)S(%)Cl(%)75.6740.4050.079.531088235.085.4840.553.631.420.161.7513.4826.4560.072189262.143.3528.030.920.75.d.12.711.3816.1082.521903150.546.3347.200.410.04.d.:.d.1.21.,().,1~2cm5~8mm,().1Fig.1Experimentalprocedure1.2.125%(,g/g),.,,..2~3d,,5mm,,/,.,(1.0cm,1~1.5cm,1.5~2.0cm,2.0cm)..1.2.2()50%,50%5%02%4%6%8%,,g/g.,.2Table2Samplecompositionofsewagesludgederivedfuel(%)00.51.01.52.075.7*M01M02M03M04M0570M101M102M103M104M10560M201M202M203M204M20550M301M302M303M304M30575.7*J01J02J03J04J0570J101J102J103J104J10560J201J202J203J204J20550J301J302J303J304J305:*9062822.10204060801002030405060(%)(a)0204060801002030405060(%)(%)(b)2Fig.2Relationshipsbetweenthewatercontentofthemixturesandtheirgranulatingproportions.,,.,,,,,.,,.2.,.2(a),,33%~58%,,,.33%40%,20%60%;40%58%,.,,.,30%~47%.,.,,20%~40%,185%.2.2020406080100706050(%)(a)020406080100706050(%)(%)(b)3Fig.3Influenceofcombustionadjuvantonthegranulatingratio2.01.51.00.502.2.13,,,,,,,,70%,2.074.2%,1.084.3%,0.50;60%,1.545.9%,0.572.1%.,,.1.0,50%17.9%,60%70%,1090767.7%84.3%,.,,,,.60%,2.011.9%,1.5,1.0,0.523.3%31.0%40.9%,4.2.2.24(a)4(b),,,,.70%,2.0,2.63MPa,1.0,2.08MPa.,,3.87MPa.4(c),4(d),,,,,.60%,2.0,1.5,1.0,0.5,1.11,1.27,1.35,2.28MPa,2.,,50%,,70%,2.0,,,;,,,,,.,.,,,,,,,,,,,,.,,,,.01234706050(MPa)(a)1.0~1.5cm012345706050(MPa)(b)1.5~2.0cm0123456706050(MPa)(c)1.0cm01234706050(%)(MPa)(d)1.0~1.5cm4Fig.4Influenceofcombustionadjuvantonthecompressivestrengthofsamples2.01.51.00.50,,90828.2.32.3.1,5mm,,4,1.0cm,1.0~1.5cm,1.5~2.0cm,2.0cm,.,5.40506070800%2%4%6%8%(%)02468(%)5Fig.5Relationshipbetweenthecoalashratioandgranulatingratio5,,,4%,,59.4%73.8%,,,8%,73.3%.010203040501cm1~1.5cm1.5~2cm2cm(%)02%4%6%8%1.0cm1.0~1.5cm1.5~2.0cm2.0cm6Fig.6Influenceofthecoalashrationonthelengthofsamples2.3.26,,,6%8%,2cm.4%,1~1.5cm1.5~2cm,.,.,.2.3.37,4%,,,4.07MPa2.94MPa;4%,,.6,7,4%.0.51.52.53.54.50%2%4%6%8%(MPa)02468(%)7Fig.7Influenceofthecoalashrationonthecompressivestrengthofsamples33.1,33%~58%,20%80%;,30%~47%,,,20%~40%.3.2,,,;,,,;,.3.3,,10909.4%.[1]HallJ,DalimierF.Wastemanagement—sewagesludge:surveyofsludgeproduction,treatment,qualityanddisposalintheEU[R].Paris:AnjouRecherche,1994.[2]PavelS,JaroslavB,LadislavB.Thermalprocessingofsewagesludge[J].AppliedThermalEngineering,2006,26:14201426.[3].[D].:,2003.[4]WertherJ,OgadaT.Sewagesludgecombustion[J].ProgressinEnergyandCombustionScience,1999,25:55116.[5],.[C]//.:,2007:489497.[6],.[J].,1996,2(12):1316.[7],,.[J].,2000,22(1):3740.[8].[J].,2002,23(4):5758.[9]DospoyR,RaleighC,HarrisonC.Pelletizedfuelcompositionandmethodofmanufacture:US,5743924[P].19980428.[10].[J].,2000,18(1):64.[11],,.[J].,2004,10(3):232236.[12]SudhagarM,LopeGT,ShahabS.Effectsofcompressiveforce,particlesizeandmoisturecontentonmechanicalpropertiesofbiomasspelletsfromgrasses[J].BiomassandBioenergy,2006,20:648–654.[13]SusanneP,CalleN.Briquettingandcombustionofspring-harvestedreedcanary-grass:effectoffuelcompostion[J].BiomassandBioenergy,2001,20:25–35.[14]HusainZ,ZainacZ,AbdullahZ.Briquettingofpalmfiberandshellfromtheprocessingofpalmnutstopalmoil[J].BiomassandBioenergy,2002,22:505–509.[15]LiYD,LiuH,ZhangO.High-pressurecompactionofmunicipalsolidwastetoformdensifiedfuel[J].FuelProcessingTechnology,2001,74:81–91.(1970),,,,,.70.2,.7,GreenFieldEnerkem.(AWRI)2,2.5.Enerkem,Sherbrooke.Enerkem,,..,,.StepbenMandel2010,90%.CatalystsGroupPesourcesJohnJMurphyAERIEnerkem,.:..Chemical&EngineeringNewlMuly7,9(2008)