超细粉再燃降低NOx排放的热态试验研究与数值模拟

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1、浙江大学博士学位论文超细粉再燃降低NOx排放的热态试验研究与数值模拟姓名：徐璋申请学位级别：博士专业：工程热物理指导教师：岑可法;池作和20030701浙江大学博士学位论文ABSTRACTPollutantNOxemissionisanincreasingthreattoenvironmentandhumanhealth，whichbecomesanurgentproblemtobesolved．CoalcombustioninpowerplantisamajorsourceofNOxManycon

2、trolmethodshaveemceedasthetimesrequireforsolvingtheNOxemissionproblem．Oneoftheseisfuelreburning，Inthispaper,micronizedcoalpowderreburningtechnologyisbroughtforwardandaseriesofexploringresearchworkiscarriedoutaimingatthekeyissuesoffuelreburningsuchasNOx

3、reductionefficiencyandburnoutrate．Firstresearchonphysicsandcombustioncharacteristicofmicronizedcoalisprocessedinthispaper．Theresultsofthechangetendencyofpulverizedcoalcharacterwithparticlediameteraregotfromparticlediameterdeterminingtest，holestructurea

4、nalysistestandTGanalysistest，whichprovidetheoryelementforNOxreductionresearchwithmicronizedcoalreburningAfteralotofsurveyandcarefuldesignwork，aone—dimensionaltestsystemwithmulti—functionsuchasairstageandfuelreburningisbuiltup．Thissystemisasemi-industri

5、alfacilityandcangetinstructiveresultsforengineeringutility．ThetemperatureiscontrollableandresultantandreductiveprocessofNOxcanbesimulatedinfurnace，whichprovidetestelementforNOxreductionresearchwithmicronizedcoalreburningUsingthissystem，researchonNOxemi

6、ssionandburnoutcharactersofthetestfacilityarecarriedout。TheresultsofinfluenceonNOxemissionandcarboninflyashbycoaltype，coalparticlediameter，furnacetemperatureandexcessairarereachedthroughtests．Thenmicronizedcoalreburningtestsareprocessed，whichshowaremar

7、kableeffectresultsOilNOxreductionandburnoutrate．Inthispaper,thenumericalsimulationsofmicronizedcoalrebumingareconducted．Theinfluenceonreburningefficiencybyabove—mentionedfactorsandNOxconcentrationalongthefurnacearestudied．Thissimulationenrichesthetestr

8、esultsandgivesouttheglobaldistributionoffurnacetemperature，NOxandothercomponents，whichprovidesanewwayfortheresearchworkonNOxreductionbymicronizedcoalreburning．Inthispaper,aprimaryschemeformicronizedcoalreburningisbroughtforwardfromequip