670MW火电机组锅炉水压试验方案

1/361.编制依据1.Basisofcompilation1.1《电力建设施工质量验收及评定规程第2部分：锅炉机组》DL/T5210.2-20091.1“QualityacceptanceandevaluationregulationsforElectricpowerconstruction(thesecondpart:Boilerunit)”DL/T5210.2-20091.2《电力建设施工技术规范第2部分：锅炉机组》DL/T5190.2-20121.2“Electricalpowerconstructiontechnicalmanual,thesecondpart:boilerUnit”DL5190.2-20121.3《火力发电厂汽水管道设计技术规定》DL/T5054-19961.3“TechnicalregulationoftheThermalpowerplantsteaming-waterpipingdesign”DL/T5054-19961.4《电力建设施工质量验收及评定规程第5部分：管道及系统》DL/T5190.5-20121.4“Qualityacceptanceandevaluationregulationsforelectricpowerconstructionengineer(thefifthpart:pipelineandsystem)”DL/T5190.5-20121.5《电力基本建设热力设备化学监督导则》DL/T889-20041.5“Guideofchemistrysupervisionofthermalequipmentsforpowerstationcapitalconstruction”DL/T889-20041.6《火力发电厂焊接技术规程》DL/T869-2012；1.6《Thethermalpowerplantweldingtechnicalregulation》DL/T869-2012；1.7《ASME动力管道》B31.1-20101.7“ASMECODEFORPOWERPIPING”B31.1-20101.8《电力建设安全工作规程第1部分：火力发电厂》DL5009.1-2002；1.8“Powerplantconstructionsecuritystandard”DL5009.1-2002；1.9《工程建设强制性条文(电力工程部分)2011版》；1.9“Engineeringconstructioncompulsoryprovisions”（electricitypart）2011；2.0《锅炉说明书·锅炉安装》（哈尔滨锅炉厂有限责任公司编制）2.0“Boilerspecification·boilerinstallation”(HarbinboilerplantCo.,Ltd,preparation)2.1《锅炉本体说明书》（哈尔滨锅炉厂有限责任公司编制）2.1“Boilerproperspecification”(HarbinboilerplantCo.,Ltd,preparation)2.作业范围及工程量2Constructionscopeandengineeringquantity2.1工程概况2.1Projectprofile2/36电厂1×670MW机组锅炉是哈尔滨锅炉厂有限公司，根据哈锅自主研发技术设计、制造的超临界锅炉。该锅炉为变压运行、一次中间再热、单炉膛、平衡通风、固态排渣、全钢架悬吊结构、露天布置的“π”型超临界直流锅炉。带有内置式再循环泵的启动系统，采用低NOX燃烧技术，24只燃烧器分6层布置，采用切圆燃烧方式，配北京电力设备总厂6台ZGM133G-Ⅱ中速磨煤机直吹式制粉系统，锅炉在BMCR工况下，5运1备。1×670MWunitboilerbelongstoHarbinboilerplantco.,Ltd.,anditissupercriticalboilerdesignedandmanufacturedaccordingtotechnologyindependentresearchedbytheHarbinboilerplantco.,Ltd.Thisboileris‘π’typesupercriticalonce-throughboilerofvariablepressureoperation,oncereheating,singlefurnace,balancedventilation,dryslagging,fullsteelsuspensionstructure,andopenlayout.Withstart-upsystemofbuilt-inrecirculationpump,usinglowNOxcombustiontechnology,24setsburnsarearrangedin6layers,usingtangentialfiringmethod,with6setsZGM133G-Ⅱmedium-speedcoalmilldirectblowingtypecoalpulverizingsystemfromBeijingpowerequipmentgroup,intheBMCRworkconditionthe5setsboileroperationandoneforpreparation.锅炉采用全钢结构构架，高强螺栓连接。受热面呈“π”型布置，炉膛上部有屏式过热器；水平烟道中布置有末级过热器、末级再热器；后烟道有中间隔墙，竖井前部布置水平低温再热器、立式低温再热器，竖井后部布置水平低温过热器、立式低温过热器和省煤器。Boileradoptsthefullsteelstructureframework,connectionwithhighstrengthbolts.Heatingsurfacearrangementby‘π’type,thereisplatensuperheaterinthefurnaceupperpart;arrangethefinal-stagesuperheaterandfinal-stagereheaterinthehorizontalflue;rearpasshasmidfeather,inthefrontofverticalshaftarrangementhorizontallow-temperaturereheaterandverticallow-temperaturereheater,inthebackofverticalshaftlayouthorizontaillow-temperaturesuperheater,verticallow-temperaturesuperheaterandeconomizer.锅炉型号boilermodel：HG―2076/25.4―HM16主要参数mainparameter过热蒸汽superheatedsteam：BMCR流量flow2076.41t/hBMCR出口压力outletpressure25.4MPaBMCR出口蒸汽温度steamtemperatureofoutlet571C再热蒸汽reheatedsteam:BMCR蒸汽流量steamflow1728.61t/h进/出口蒸汽压力steampressureofinlet&outlet4.464/4.274MPa3/36进口/出口蒸汽温度steamtemperatureofinlet&outlet318.8/569℃给水温度feed-watertemperature：291.4℃2.2作业范围及主要工程量2.2constructionscopeandmainengineeringquantity锅炉水压试验范围:Boilerhydraulictestscope:本次水压包括一次汽系统及连接管道、二次汽系统及连接管道、锅炉本体范围内一次门以内的承压管道。具体如下：Thishydraulictestincludessuperheatersteamsystemwithconnectionpipeline,reheatersteamsystemwithconnectionpipeline,pressure-bearingpipelinewithinfirstvalvewithintheboilerproperscope.Specificasfollowing:2.2.1一次汽系统包括：主给水及给水旁路电动闸阀（10LAB70AA003、10LAB70AA002）、过热器减温水总管3#闸阀后至省煤器入口集箱间管道、省煤器、省煤器连接导管（溢流管路暖管至10HAC13AA005电动截止阀）、循环泵暖管、四侧水冷壁、汽水分离器、贮水箱、启动循环泵壳（含临时堵板）、顶棚过热器、包墙过热器、中间隔墙、低温过热器、一级减温器（至过热器一级喷水减温10LAE11AA002、10LAE11AA004电动截止阀）、分隔屏过热器、二级减温器（至过热器二级喷水减温10LAE12AA002、10LAE12AA004电动截止阀）、末级过热器、主汽管道（J列柱中心向炉前2190mm处）水压堵板前部分。锅炉本体过热器系统：末级过热器出口至安全阀水压试验堵头。2.2.1Superheatersteamsystemincludes:mainfeed-waterandelectricgatevalveoffeed-waterbypass（10LAB70AA003、10LAB70AA002）,fromthebackof3#gatevalveofsuperheaterdesuperheatingwatermaintotheheaderpipelineofeconomizerinlet,economizer,economizerconnectiontube(fromthewarmingpipeofoverflowpipelineto10HAC13AA005electricstopvalve),circulatingpumpwarmingpipe,foursideswater-cooledwall,steam-waterseparator,waterstoragetank,start-upcirculatingpumpcasing（includingengineeredtemporaryblockingplate）,roofsuperheater,enclosurewallsuperheater,midfeather,low-temperturesuperheater,firstleveldesuperheater(to10LAE11AA002、10LAE11AA004electricstopvalveofsuperheaterfirstlevelspraydesuperheating),separateplatensuperheater,secondleveldesuperheater(to10LAE12AA002、10LAE12AA004electricstopvalveofsuperheatersecondlevelspraydesuperheating),final-stagesuperheater,frontpartofthehydraulictestblockingplateofthemainsteampipeline(atthe2190mmfromJcolumncentertotheboilerfront).Superheatersystemoftheboilerproper:hydraulictestplug,fromthefinal-stagesuperheateroutlettosafetyvalvehydraulictestcap.4/362.2.2二次汽系统包括：冷段管道水压试验堵阀后至低温再热器入口集箱间管道、低温再热器、减温器喷嘴暖管、再热器减温器（至再热器喷水减温器管路10LAF70AA011、10LAF70AA