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1、浅谈复合硅酸盐保温材料在蒸汽管道保温中的应用摘要对电厂主蒸汽管道外表面温度超标现象进行分析，提出改造技术方案及施工工艺要求，介绍复合硅酸盐保温材料在蒸汽管道节能改造中的成功应用。Picktoexceedthephenomenonofpowerplantmainsteampipeoutsidesurfacetemperaturewereanalyzed,andputforwardreformrequirements,technicalschemeandconstructiontechnologyofcompositesilicateinsulationmaterialsinenergysavin
2、grenovationthesuccessfulapplicationofsteampipeline.关键词汽管道保温节能环保应用Keywordssteampipelineinsulationsectiontoenvironmentalapplications一、改造前保温存在的问题电厂12MW次高温次高压机组主蒸汽管道，原设计保温材料是硬质成型微孔硅酸钙，在运行中由于机组启、停时管道产生热位移，交变挤压；管道的轻微震动；长期高温使用等原因，造成硅酸钙碎裂粉化，形成很多裂缝，保温材料的热密封性能下降，蒸汽管道热能容易向外散发。同时保温材料塌陷出现空洞，特别是在水平管与垂直管段交接的弯头处出现脱
3、节，保温效果很不理想，外表面温度平均55℃，局部温度高达150℃以上，散热损失较大。Thetransformationbeforeinsulation,theproblemsexistinginthepowerplant12mwtimehightemperatureandhighpressuremainsteampipeunit,theoriginaldesignishardshapedmicroporouscalciumsilicateinsulatingmaterialandintheoperationofthethermaldisplacementduetopipeunitstart-u
4、pandstoppingtime,alternatingextrusion;Pipingvibrations;Duetolong-termuseinhightemperaturecalciumsilicatecataclasticpulverization,formingmanycracks,heatsealingperformanceofinsulationmaterials,steampipeheattosendouteasily.Insulationfailuresappearedemptyatthesametime,especiallyinhorizontaltubeandvertic
5、alsectiondisconnectatelbow,heatpreservationeffectisnotveryideal,outsidesurfacetemperatureof55℃,anaveragelocaltemperatureashighas150℃above,heatlossisbigger.按GB4272－92《设备及管道保温技术通则》，在设备或管道外表面采取保温措施后，其保温层外表面温度必须小于50℃的规定，外表面温度已经超标。因此，节能降耗工作成为需要解决的当务之急，同时管道的保温节能改造既是技术的需要，是企业管理的重要内容，也是节能降耗的重要途径，因此电厂于2005年对
6、1#、2#机组主蒸汽管道进行了保温节能改造。AccordingtoGB4272-92"generalprinciplesforequipmentandpipeheatpreservationtechnology,theequipmentorpipeoutersurfaceheatpreservationmeasures,theinsulationmustbesmallerthantheoutersurfacetemperatureof50℃,outsidesurfacetemperaturehasbeenoverweight.Therefore,becometheprioritiesofene
7、rgyconservationandconsumptionreduction,energysavingrenovationisbothatthesametime,pipeinsulationtechnologyneeds,istheimportantcontentofenterprisemanagement,isalsoanimportantwaytosavingenergyandreducing
