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1、SHL20-2.45_400-WⅠ型自然循环蒸汽锅炉设计哈尔滨理工大学学士学位论文SHL20-2.45/400-WⅠ型自然循环蒸汽锅炉设计摘要锅炉是发电、化工及机械制造等工业部门地重要能源、热源地动力设备.锅炉由许多部件组成,包括锅筒,过热器,空气预热器,省煤器等.文档收集自网络，仅用于个人学习本次设计地任务是设计SHL20-2.45/400-WⅠ锅炉,为双锅筒自然循环蒸汽锅炉.炉膛四周布置有水冷壁,为保证炉膛中持续和稳定地燃烧,采用高而短地前拱和低而长地后拱.在炉膛之后设有蒸汽过热器,上下锅筒之间布置密集地对流锅炉管束,为主要受热面.尾部烟道布置有省煤器和空气预热器.布置省煤器以降低
2、排烟温度,提高锅炉效率.布置空气预热器,加强着火和燃烧,同时也可以降低排烟温度,提高锅炉效率.燃料为一类无烟煤,其低位发热量为18187kJ/kg.文档收集自网络，仅用于个人学习在整个设计过程中作为技术支持进行了热力计算、强度计算和烟风阻力计算.为了使小型锅炉地结构紧凑,大部分受热面都布置在炉膛内,同时,还要确保有一定地气密性以保证炉膛内进行负压燃烧.文档收集自网络，仅用于个人学习利用CAD,完成了锅炉总图、炉墙图、上锅筒展开图、本体图、集箱图.关键词蒸汽锅炉；设计；热力计算；强度计算；烟风阻力计算-III-SHL20-2.45_400-WⅠ型自然循环蒸汽锅炉设计哈尔滨理工大学学士学位
3、论文DesignfortheneturalcirculationsteamboilerSHW20-2.45/400-WⅠ文档收集自网络，仅用于个人学习AbstractThedemandonSecurityandeconomyonenergyofindustryproductionhavebecomeimportanttopicattendedbysocietywithdevelopmentofnativeeconomy.Theboilerismadeupofmanydepartment,includedrum,superheater,air-preheater,economizeran
4、dsoon.文档收集自网络，仅用于个人学习Thethemeofthisdocumentistodesignastreamboiler,whosetypeisSHW20-2.45/400-WⅠ,Theboilerisdouble-drumnaturalcirculationsteamboiler.aroundthefurnacearewaterwalls,Toensurethegoodandcontinuousignitioninthefurnace,Itakeahighandshortfrontarch,shilethebackarchislowandlong.Behindthefur
5、naceisthesteamsuperheater.Therearedensetubenestbetweenthetwodrums,whichcomposethemainheat-deliverysurface.Inthebackstakeflue,Isettheeconomizerandair-preheater.Settheeconomizertodeclinethetenperatuerofthestackgasandimprovetheefficiencyinthefurnaceandsettheair-preheatertostrengthenignitionandfirin
6、g,meantimetodeclinethetemperatureofthestackgasandimprovetheefficiencyinthefurnace.Thedesignfuelisthenumberoneanthracite,whoselowerradiationvalueis18187kJ/kg.文档收集自网络，仅用于个人学习Throughoutthedesignprocessasatechnicalsupportforthethermodynamiccalculation,strengthcalculationandthesmokewindresistancecalc
7、ulation.Toenablesmallboilercompactstructure,mostoftheheatingsurfaceareinstalledinthehearth,meanwhile,weshouldalsoensurethatthereissomehermetictoensurethatwithinthevacuumchambercombustion.文档收集自网络，仅用于个人学习-III-SHL20-2.45_400-WⅠ
