循环流化床锅炉炉内传热特性研究及仿真

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1、东南大学博士学位论文循环流化床锅炉炉内传热特性研究及仿真姓名：刘鸿申请学位级别：博士专业：动力工程及工程热物理指导教师：周克毅20070308AbstractCirculann2FluidizedBedBoilerhasmanystrongpoints，suchashighcombustionefficiency,goodriteladaptability,productfewpolluterandsoon．Nowadays，theworldpeopleattachmoreandmoreimportancetoenvironmentprot

2、ectingandcoalisourmainericrgysourceforages．SOCirculatingFluidizedBedBoilerwillmakearapiddevelopmentintheworld．CirculatingFluidizedBedBoilerhasthesimilarcourseintheboilerasCoalPowderBoileraccordingtothethoroughstudvbvresearchers．butthecourselnfurnaceisverydifierentfromCoalP

3、owderBoiler：hasobviouslydensesegmentandraresegment；hassolidparticleswithhighconcentration；theflowfieldisverycomplex；radiationandconvectionbothaccountforgreatproportion；thefeeliswidelyscreened；andthecourseofcombustionismorecomplexthanCoalPowderBoiler．Sotheheattransfercharac

4、teristicanditsimpactfactorsofCirculatingFluidizedBedBoilerhavenotyetbeen血llyresearchedandunderstood．Inthispaper,basedonthestudyofmanyothel"people．1deeplystudyedthecharacteristicsinthefitmaceofCirculatingFluidizedBedBoiler,andthisisofgreatsignificanceintheoperationoftheCFBB

5、，thecontrolsysternoptimizationandlargescaleandsoon．hltheresearch．IputemphasisOiltheheattransfercharacteristicsinthefurnace，throtlghthemethodsoftheoreticalanalysisandmodelsimulation．IfirstlyfomadtherulethattheunitquantityfLlle’sheatdecrease(increase、withtheincmase(decrease)

6、of血le，squamity．ComparedwlthCoalPowderBoiler,Ihaveaualysedthechangesinthemagnitudeandthereasonsforthesecharacteristics，andthisprovidedtheimportanttheorybasisinCirculatingFluidizedBed'senlarge，OptimalOperationanddesign，etc．Forthedeeplystudyontheheattransfercharacteristicsint

7、llefLlmaceofCFBBandtheverificationoftheoreticalanalysis，inthePaper。basedontheanalysisandcomparisontovariousexistingmodels，Ifellyconsideredthecharacteristicsofhighsolidsconcentrationandcomplexflowfield，usedcoreannulusflowssmactureandestablishedCFBBfumace’swholedynamicmathem

8、aticsmodel．Themodeliscomposedofmainbodvmodelandchildmodel，MainbodymodeliscomposedofGascom