项目改造施工方案(中英文版) 2

1糖厂1×45t/hCFB锅炉改造方案TheUpgradeProjectof1×45t/hCFBBoiler一工程概况：1.ProjectOverview本项目为一台1×45t/hCFB锅炉改造，其主要工程项目为：更换二次风机，引风机；对锅炉二次风管部分管道进行改造，增加二次风管风门调节阀，送料风调节阀，密封风调节阀，圆形碳钢给料管改为方形不锈钢给料管，螺旋给料机检查门改为快开式；Thisprojectisarenovationof1×45t/hCFBboiler,anditsmainprojectsareasfollows:toreplacethesecondaryfanandinduced-draftfan;totransformpartialpipelineofboilersecondaryairduct,toincreasethethrottlevalveofsecondaryairduct,throttlingvalveofboththefeedingairflowandthesealingairflow,tochangethefeedingpipefromroundcarbon-steelintosquare2stainlessandtochangetheinspectiondoorofspiralfeederintoquick-openingtype.100t/h大气热力式除氧器钢架与平台制作，安装一台100t/h大气热力式除氧器和一台Ø800连续排污器，增加锅筒连续排污装置；安装取样器4个，Fabricationofsteelframeof100t/hatmosphericthermaldeaeratoranditsplatform;installationofa100t/hatmosphericthermaldeaeratorandaØ800continuousblowdowndevice;increaseofcontinuousblowdowndeviceforboilerdrum;andinstallationoffoursamplers.受煤斗加高700mm左右，安装振动给料机一台，更换破碎机一台，安装皮带秤一套。Increasetheheightofcoal-receivinghopperbyaround700mm,installaset3ofvibratingfeeder,changeasetofcrusherandinstallasetofbeltscale.锅炉电气控制系统：控制系统改为PLC控制；给水泵、一次风机、二次风机、引风机改为ABB变频控制，增加部分控制电缆和桥架。Electricalcontrolsystemofboiler:changethecontrolsystemtothePLCcontrol;changefeedpump,primaryfan,secondaryairfan,induced-draftfantoABBvariablefrequencycontrol,increasesomecontrolcableandcabletray.二．施工方案2.ConstructionScheme1).引风机更换，拆除原有引风机，利用原有引风机基础，新引风机轴承座和电机仍坐在一基础上，风机壳在原基础上焊接400mm高的钢支架固定，固定后为美观浇筑混凝土。根据风机安装高度和风机出口尺寸，做天园地方大小头与原风道连接。按风机安装技术要求精度找平找正。41).Replaceinduced-draftfanandremovethepreviousinduced-draftfan;thebearingblockofnewinduced-draftfanandthemotorarestillonthesamefoundation,forwhichtheoriginalinduced-draftfanfoundationwillbeused;welda400mm-highsteelbrackettofixthedraughtfancasingontheoriginalfoundationandcastconcreteforaestheticpurpose.Fabricatethesquareandroundconnectionreducertoconnectwiththeoriginalairductaccordingtotheinstallationheightofblowerandthesizeofbloweroutlet.Makelevelingandaligning,accordingtotherequiredprecisionoftechnicalrequirementsforinstallationofblower.2).鼓风机更换，拆除原有引风机，风机基础拆除到风机机壳底座高度，保留原混凝土中钢筋。鼓风机轴承座框架制作的与风机机壳底座同高，在基础上用水钻开加强孔8个，孔DN100，深400，风机安装位置按风机出风口中心线确定。风机安装就位后将鼓风机轴承座框架与保留钢筋焊接再5支模浇筑混凝土。按风机安装技术要求精度找平找正。2)Replaceairblowerandremovethepreviousinduced-draftfan;dismantletheblowerfoundationtotheheightofbaseofblowercasingandretaintheoriginalreinforcementsteelbarsofconcrete;fabricatetheframeofbearingblockofairblowerandmakeitthebaseatthesameheightofblowercasingandusehigh-pressurewaterjettoopeneightreinforcedholesonthatfoundation,withtheholeofDN100andthedepthof400.Theinstallationpositionofblowershouldbedeterminedbythecenterlineofthebloweroutlet.Aftertheinstallationandpositioningoftheblower,weldtheframeofbearingblockofairblowerandthereservedsteelbarstogether,andthenuseformworksupporttopourconcrete.Makelevelingandaligningaccordingtotherequiredprecisionoftechnicalrequirementsforinstallationofblower.63)二次风道改造，锅炉右侧二次风道（进料侧）在炉后大小头处切断，直径增加到900mm,水平转90度后通到锅炉原二次风道三通处，向上90度翻转，通到锅炉原有槽钢框架处90度左转，将φ900管道支撑在槽钢框架上。此管运作为锅炉进料侧二次风母管，炉前六支φ200二次风管和三支φ100密封风管，由此因管向下引出，风管在适当高度安装调风门，风门处于同一高度，在风门下方1.4m处设置风门操作平台。六支φ200二次风管以中心分为左右各三支穿过给料机平台框架后，左右各三支分别向中心转45°再向前倾斜转45°与原二次风口碰头。三支φ100密封风管通到给料机上部盖板上。在9支分风管调节阀是端安装单波补偿器。3)Upgradeonsecondaryairduct:thesecondaryairductontherightsideoftheboiler(feedingside)shouldbecutoffonthereducerofthefurnacerear,increasethediameterto900mm,rotateby90degreesinhorizontallevelandthenconnecttotheteeoftheoriginalsecondaryairductofboiler;Turn7upwardsby90degree,thenpasstothepositionoforiginalchannelframeworkofboilerandturnleftby90degrees,andtheninstallφ900pipesupportsontheframeworkofchannelsteel.Thepipeisusedasthemainpipeofsecondaryaironthesideofboilerfeeding.Sixφ200secondaryairductsinthefrontofboilerandthreeφ100sealedairductsshouldbeleddownwardfromthispipe.Theairductshouldbeequippedwithadjustabledampersatproperheightatthesamelevel;meanwhile,theoperatingplatformofairdampersshouldbesetbelowby1.4m.Sixφ200secondaryairductsshouldbedividedintothreebranchesateachsidebythecenterlineandthengothroughtheframeworkoffeederplatformframe,witheachthreebranchesmovingtowardsthecenterby45degreesandalsotiltingforwardandrotatingby45degrees,finallyconnectingtotheoriginalsecondaryairoutlet.Threesealingairpipesofφ100shouldbeconnectedtotheuppercoverplateofthefeeder.Asingle-wave8compensatorshouldbemountedontheuppersideofthecontrolvalveofninesub-airducts.炉后原三支φ700二次风管在分支管大小头处切断，直径设仍为φ700m，在大小头后处向上90°转弯升高到原炉后最高的一支二次风管高度，并转90°与最其连接。其长度与原风管相同。炉后4根φ200二次风管，由此管向下引出，在锅炉平台适当高度安装调风门。炉前一支φ200二次风管，由此出风管端部引出。转90°到炉前，在锅炉中心部位再向下转90°与原二次风进口连接，同时在适当高度安装二次风门。Theoriginalthreesecondaryairductsofφ700attherearfurnaceshouldbecutoffinthereducerofthebranchpipeandthediametershouldbestillsetatφ700mm,andshouldbeturnedupwardby90degreesattherearofthereducerandthenbeliftedtotheheightofthehighestsecondaryairductattheoriginalboilerrear,andberotatedby90degreesforconnectionwithitslength9thesameastheoriginalairduct.Foursecondaryairductsofφ200attherearofboilershouldbeledoutbythisductandanadjustabledampershouldbemountedattherightheightofboilerplatform.