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《陜西科技大學(xué)過(guò)程裝備與控制工程過(guò)程裝備雙語(yǔ)Chap.9 Boi》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、Chapter9Boilers燃油燃?xì)忮仩tPara1:steamgenerators——boilers,areusedtoproducesteam;ThewholeParaisaboutapplicationsandfunction.Para2:Heattransfermethods:Acombinationofradiant,conductive,andconvectivetochangewatertosteam;Components:Fig.9.2-1Factorsaffectingboileroperation:Densitydifferences,pressure,t
2、emperature,waterlevel.§9.2BoilerApplicationsandBasicOperationComponents:Fig.9.3-1§9.3FireTubeBoilersMechanism:transferheatfromthefiretubesandintoboilerfeedwater;Firetube——denotesthattheheatsourceisfromwithinthetubes;Firetubeboiler——P170Keyterms§9.3FireTubeBoilersBasiccomponents(Para1):Fig.9
3、.4-1,Fig.9.6-1§9.4WaterTubeBoilers(themostcommontype)Principleofoperation(Para2):watercirculation——differentialdensity;Pressure(Para3):1.Steamgenerationcausespressuretorise;2.pressureismaintained——addingmakeupwater;continuouslyapplyingheat.§9.4WaterTubeBoilers(themostcommontype)MainComponen
4、ts:1.Furnace:components;line22.Tubes:3.Drums:4.GasandOilBurners:Fuel:mostboilersusenaturalgasoratomizedfueloilburners;somelargeboilers(primarilyinelectricalgeneratingplants)burncoal.Componentsandmechanism:Fig.9.4-2§9.4WaterTubeBoilers(themostcommontype)§9.4WaterTubeBoilers(themostcommontype
5、)5.EconomizerSection(1)Function:increaseboilerefficiencybypreheatingthewater;(2)Mechanism:hotgasesmovingintothestackstillhaveenoughheattooffsetenergycosts.Boilerfunctions:Steam:§9.4WaterTubeBoilers(themostcommontype)Procedure:Typicalproblems:line3,Para3§9.5BoilerOperationWaterhammer:Para2,f
6、irst3linesSolvingmethods:steamtrapsareusedtoremovecondensate;§9.6SteamSystemsCategories:Mechanical——invertedbuckets;Fig.9.6-2forcondensate,air,othernon-condensablegases;Buckettrapfullofcondensate→bucketrestsonthebottom→valveopens;Steamfills→bucketrises→valvecloses§9.6SteamSystemsFloats.Fig.
7、9.6-3notfornon-condensablegases;§9.6SteamSystemsThermostatic熱靜力型——bellows-typetraps.Fig.9.6-4cheaper;alsofornon-condensablegases.§9.6SteamSystems練習(xí)：8、15、16Thankyouforlistening！
