国内外污泥热干燥工艺的应用进展及技术要点

,,(,100084):,,,,;,:;;:X703.1:B:1000-4602(2007)08-0005-04ApplicationProgressandTechnicalMainsofThermalSludgeDryingProcessesatHomeandAbroadWANGXing2run,JINYi2ying,NIEYong2feng(DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Theresearchprogressofsludgedryingequipment,commondryingprocesstypesandtheirworkingprincipleathomeandabroadwereintroduced.Theadvantages,disadvantagesandtechni2caldifficultiesofdifferentdryingprocessesandequipmentwereanalyzed.Thekeytechnicalmainsduringthetypeselectionanddevelopmentofsludgedryingequipmentweresummarized.Itwasputforwardthatenergyconsumptionandsystemsecuritywerethekeyfactorsfordryingequipmentselectionanddesign.Fortheenergyconsumption,theheatsourceanddryingprocessshouldbeconsidered,andtheheatlossshouldbedecreasedusingtherelevanttechnicalmeanstoimprovethedryingefficiency;forthecontrolofthesecurity,considerationshouldbegiventoreducingdustconcentrationandoxygencontent.Keywords:sludgedrying;thermalsludgedryingtechnology;sludgedryer:(JC2003010)1111(),,,,,,15%,85%,,,[12][3],1523820074CHINAWATER&WASTEWATERVol.23No.8Apr.20071Fig.1Flowchartofrotatingdrumdryingtechnique:,,,,,,,,,112,,,,,22Fig.2Flowchartofmultiplestepdryingtechnique:,,,,,,,[4]11Tab.1Characteristicsofcommondryingtechniques/(kJkg-1)/(kWhm-3)/,,320035005090AndritzBioGroSwissCombiOkawaraLargoBasel//,27504555Atlas2StordSNBLynettenI.V.A.R32604560AndritzSeghers/,2750100200WABAG[4]Andritz6238(60%),,,50%,,,,,,,:a.;b.,510,590%,10%20%,50%55%,,,,:a.,;b.,2211,80%,,,:,,,,,,,;;:,;;,,212,[1]:,60g/m3;(),12%;();(),,,,,,,,,3,,,7:238,,,,,,,,:[1],.[J].,2002,28(2):35-36.[2],.[J].,2002,18(1):90-92.[3],,,.[J].,2003,19(5):105-106.[4].[J].,2004,22(6):374-378.:[phone]E-mail:[e-mail]:2006-09-12200721(),(),,4.6km,,(),,20%,;,,,,,,,,,(),PSP,,(HDPE),,HDPE,,,()8238