48t-h直烯生物質(zhì)鍋爐數(shù)值模擬及優(yōu)化.pdf

1、華北電力大學(北京)碩士學位論文48th直烯生物質(zhì)鍋爐數(shù)值模擬及優(yōu)化姓名：趙芳芳申請學位級別：碩士專業(yè)：動力工程及工程熱物理；工程熱物理指導教師：董長青；劉文毅201103華北電力大學碩十學位論文AbstractBiomasspowergenerationiSattractingmoreandmoreattentionbecauseitsnearlynetzeroemissionofcarbondioxideanditshighfuel

2、flexibilityComparedtocoal，biomasshaslOWemissionofSOxandparticulatemattersfromthecombustionprocessbecauseitslowsulphurandashcontentSobiomassutilizationplayedasignificantroleinthedevelopmentofenvironmentallyfriendlysociety

3、GratefiredboilerhastheadvantagesoflOWinvestmentcostandhighruelflexibitityanditiSthemaintechnologyofbiomasspowergenerationandheatsupplyInthispapernumericalsimilationoftheflowfieldWascarriedoutwithFLUENTsoftwarefordouble—g

4、ratebiomassfiredboiler，theresultswerevalidatedbyexperimentaldatatakenfroma1／30scalecoldmodeloftheprototypeSimulationsundervariousprimarysecondaryandignitionairflowratesandincidenceanglesanddifferentarchconfigurationwerea

5、nalyzedtoidentifytheoptimumflowfieldTheoperatingconditionofCase9consistedofthesecondaryairrati，lhof50／50，theairrateRPA瓜sA／R認of40／40／20，andtheupincidenceanglesofthereal“wallsecondaryairof300TlliSconditioncallbepractically

6、appliedfortheflowfieldoptimizationTheresultshowsthattheincineratorwiththefrontarchandreararchatthesamelevelhastheoptimumflowfieldMathematicalmodelingofflowfieldandcombustionwascarriedoutfortheoriginal48t／hbiomass—firedbo

7、ileraccordingtosimulationtheparametersdistributionsoftemperature，velocityandspecieswereobtainedItWassuggestedthatadjustanimportantairflowratioorfixbamesinthet11ildpasstoreduceerosionofsupperheaterKeywords：Biomass，gratefi