火力发电流程介绍范文

肃清流毒影响获得了辉煌的成就，通过参观学习，认识到了为什么会有腐败案例，知道了要铭记初心，不断的提高自我素质Ellipticityofelbowpipeswithdiameterslessthanorequalto150mmmustbenotgreaterthan8%diameterof200mmorlessshallnotbegreaterthan6%.Wallthicknessofthepipewallthinningratemustnotexceedtheoriginal15%.Creaseroughness:diameter125mmorless,shallnotexceed3mmdiameterlessthanorequalto200mm,notmorethan4mm.7.3.9simmeringbendingproductionofsquaresteeltubeextension,tousethewholetubebending.Interfaceifnecessary,theweldingpositionshouldbelocatedinthemiddleoftheverticalarm.7.3.10installexpansionjointsshouldbedone.Ifdesignisnotrequired,pipecompensatorlengthenshouldconformtotherequirementsinthefollowingtable:squarescalelengthδxisequalto1/2.Prestretchtolerance:casing+5mm,+10mm.7.3.11pipeform,location,spacingshallmeetthedesignandspecifications.7.3.12pipingonbackorreturnpipeathigherlevelsoftheuppertoautomaticvalvetoinstalladrainvalvebelowthehorizontalparts.7.3.13supportsandhangersofchecksandthenumber1)hangerinstalledmustbecheckedbeforeinstallationofsupportsandhangerspartmodels,specificationsofspringssettingvalues,whetherthematerialsmeettherequirementsofdrawingsanddocuments;2)supportsandhangersofmaterial,sizeandaccuracyshallconformtotheprovisionsofthedesigndrawings,materialtechnicalrequirementsshouldbeconsistentwithnationalstandards,industrystandardsandtechnicalrequirementsrelatedtothealloyspectrumreviewshouldbecarriedout;3)pipesupportsandhangerspartplantproductqualitycertificateforeachvariablespringsupports,constantsupporthangers,dampers,damperfunction,thereshouldbefactorycalibratedtest第二章火力发电一、火力发电概述利用煤、石油、天然气等自然界蕴藏量极其丰富的化石燃料发电称为火力发电。按发电方式，它可分为汽轮机发电、燃气轮机发电、内燃机发电和燃气-蒸汽联合循环发电，还有火电机组既供电又供热的“热电联产”。汽轮机发电又称蒸汽发电，它利用燃料在锅炉中燃烧产生蒸汽，用蒸汽冲动汽轮机，再由汽轮机带动发电机发电。这种发电方式在火力发电中居主要地位，占世界火力发电总装机的95％以上。内燃机和燃气轮机发电均称燃气发电。内燃机发电主要指功率较大的柴油机发电。柴油机系统压缩点火式发动机，将吸入的空气用活塞压缩到高温与喷入的燃油着火燃烧产生高温高压，推动机械旋转运动，带动发电机发电。它的优点是单位容量重量轻，占地面积小，投资省、建设速度快，缺点是使用燃料价格高，发电成本贵、容量小、维修工作量大、运行周期短，除特殊场合外，多用作尖锋供用电电源和应急电源。目前，最大的单机柴油发电机组功率已达4.5万kW，净发电效率达30％～40％。燃气轮机是旋转式机械，与柴油机相比更适宜于作为常用发电设备。它通过压气机将空气压缩后送入燃烧室，与喷入的燃料混合燃烧产生高温高压燃气，进入透平机膨胀作功，推动发电机发电。它的单机容量远比汽轮机小，最大功率已发展到13～21.6万kW，净发电效率可达35％以上，主要用于带尖峰负荷。肃清流毒影响获得了辉煌的成就，通过参观学习，认识到了为什么会有腐败案例，知道了要铭记初心，不断的提高自我素质Ellipticityofelbowpipeswithdiameterslessthanorequalto150mmmustbenotgreaterthan8%diameterof200mmorlessshallnotbegreaterthan6%.Wallthicknessofthepipewallthinningratemustnotexceedtheoriginal15%.Creaseroughness:diameter125mmorless,shallnotexceed3mmdiameterlessthanorequalto200mm,notmorethan4mm.7.3.9simmeringbendingproductionofsquaresteeltubeextension,tousethewholetubebending.Interfaceifnecessary,theweldingpositionshouldbelocatedinthemiddleoftheverticalarm.7.3.10installexpansionjointsshouldbedone.Ifdesignisnotrequired,pipecompensatorlengthenshouldconformtotherequirementsinthefollowingtable:squarescalelengthδxisequalto1/2.Prestretchtolerance:casing+5mm,+10mm.7.3.11pipeform,location,spacingshallmeetthedesignandspecifications.7.3.12pipingonbackorreturnpipeathigherlevelsoftheuppertoautomaticvalvetoinstalladrainvalvebelowthehorizontalparts.7.3.13supportsandhangersofchecksandthenumber1)hangerinstalledmustbecheckedbeforeinstallationofsupportsandhangerspartmodels,specificationsofspringssettingvalues,whetherthematerialsmeettherequirementsofdrawingsanddocuments;2)supportsandhangersofmaterial,sizeandaccuracyshallconformtotheprovisionsofthedesigndrawings,materialtechnicalrequirementsshouldbeconsistentwithnationalstandards,industrystandardsandtechnicalrequirementsrelatedtothealloyspectrumreviewshouldbecarriedout;3)pipesupportsandhangerspartplantproductqualitycertificateforeachvariablespringsupports,constantsupporthangers,dampers,damperfunction,thereshouldbefactorycalibratedtest把燃气发电和蒸汽发电组合起来就是燃气-蒸汽联合循环发电，它有较高的电能转换效率，受到世界各国重视。二、火力发电厂的基本生产过程这里介绍的是汽轮机发电的基本生产过程。火力发电厂的燃料主要有煤、石油（主要是重油、天然气）。我国的火电厂以燃煤为主，过去曾建过一批燃油电厂，目前的政策是尽量压缩烧油电厂，新建电厂全部烧煤。火力发电厂由三大主要设备——锅炉、汽轮机、发电机及相应辅助设备组成，它们通过管道或线路相连构成生产主系统，即燃烧系统、汽水系统和电气系统。其生产过程简介如下。1．燃烧系统燃烧系统如图2－l所示，包括锅炉的燃烧部分和输煤、除灰和烟气排放系统等。煤由皮带输送到锅炉车间的煤斗，进入磨煤机磨成煤粉，然后与经过预热器预热的空气一起喷入炉内燃烧，将煤的化学能转换成热能，烟气经除尘器清除灰分后，肃清流毒影响获得了辉煌的成就，通过参观学习，认识到了为什么会有腐败案例，知道了要铭记初心，不断的提高自我素质Ellipticityofelbowpipeswithdiameterslessthanorequalto150mmmustbenotgreaterthan8%diameterof200mmorlessshallnotbegreaterthan6%.Wallthicknessofthepipewallthinningratemustnotexceedtheoriginal15%.Creaseroughness:diameter125mmorless,shallnotexceed3mmdiameterlessthanorequalto200mm,notmorethan4mm.7.3.9simmeringbendingproductionofsquaresteeltubeextension,tousethewholetubebending.Interfaceifnecessary,theweldingpositionshouldbelocatedinthemiddleoftheverticalarm.7.3.10installexpansionjointsshouldbedone.Ifdesignisnotrequired,pipecompensatorlengthenshouldconformtotherequirementsinthefollowingtable:squarescalelengthδxisequalto1/2.Prestretchtolerance:casing+5mm,+10mm.7.3.11pipeform,location,spacingshallmeetthedesignandspecifications.7.3.12pipingonbackorreturnpipeathigherlevelsoftheuppertoautomaticvalvetoinstalladrainvalvebelowthehorizontalparts.7.3.13supportsandhangersofchecksandthenumber1)hangerinstalledmustbecheckedbeforeinstallationofsupportsandhangerspartmodels,