稻殼循環(huán)流化床氣化實(shí)驗(yàn)研究.pdf

1、刪。Ilrrl。!l。prl。r。rr。r?！籣J|』jI』|Y1530898碩士學(xué)位論文稻殼循環(huán)流化床氣化實(shí)驗(yàn)研究ExperimentStudyonRiceHuskGasificationinCirculatingFluidizedBed領(lǐng)域：研究生：指導(dǎo)教師：企業(yè)導(dǎo)師：環(huán)境工程伊?xí)月逢惞谝娼淌趯O立研究員天津大學(xué)環(huán)境科學(xué)與工程學(xué)院2008年5月ABSTRACTCirculatingFluidizedBed(CFB)ismostsuit

2、ableforlargescaleutilizationwithhugepotentialapplicationprospectcomparedwithotherconversionroutesInthisthesis，thestructuralcharactersandrunningprinciplesofCFBwereprobedanddiscussedindetailsThegasificationtestwasperformed

3、incirculatingfludizedbedgasifierwithricelmskasfeedstockandsiliconsandasbedmaterialthegasificationprocessshouldbetransferredfromsteadycombustionofricehuskwiththefurnacetemperatureraisedtoabove800centigradebyadjustingthera

4、tioofairtofeedstockThecold—stateexperimentswerefound：TheresistanceofCFBdistributorgrowsalongwiththeincreaseofairinputThismustcausehigherelectricityconsumptionbyairblowerThephenomenonofbridgingcausedbyagglomerationeasilyo

5、ccurredduetopoorfluidityofficehuskThefluidityofquartzsandwasmuchbetterthanitThepressurecurvewasstableandconsistentwiththetheoreticalcu／veinthetestsofcriticalfluidizedrateExperimentsonfeedbackequipmentfoundthatnormalfeedb

6、ackcouldbeincreasedwithwindrateWhenthereturnedstockwascirculatednormallythetemperatureofthehearthisdistributeduniformlywithsmallfluctuationinanarrowrangeOtherwise，thetemperaturewouldshowhiighfluctuatingactionGasification

7、temperatureinhearthincreasedwiththegrowingofairequivalenceratio(ER)whichhadagreatinfluenceonthehotgascomponentsandcalorificvalueItisfavorabletogasificationreactionwhenERisaround028Theincreaseoftemperaturecontributestopus

8、hreductionreactionforwardingasificationprocess，andenhancetheyieldofflammablegascomponentMeanwhile，thehighertemperaturewasobtainedbyburningtheflammablegasExperimentsrevealedthatthemostreasonablegasificationreactionhappene

9、dat750“CorsoTheinertiabedmaterial，quartzsandwhoactedasthermalcarrierandcirculatingassistant，hadplayedallimportantroleinkeepingthestablerunningofCFBThethermalstorageofsandscouldheatthericehuskAndthegoodfluidityofsandscoul

10、denhancethecirculatingofcokeandricehuskThemixtureofsandandricehuskcouldbecirculatedwellwhentheparticlesizewascontrolledintherangeofO406mmTheCFBcannotrunwellusingothermixedfeedstockwithdifferentsizes，whichispartlydecidedb