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1、Failureof9FAGasTurbineCompressor–AUniqueExperience.9FA燃气轮机压气机叶片断裂-----一个典型案例DhabolpowerprojectofRGPPL,aJointVentureofNTPC,GAIL&MSEB,consistof6numbersofGEmakegasturbinesand3numberofGEmakesteamturbineswithmoduleconfigurationof2GT+1ST.Hence,thereare3moduleand
2、knownasblock-I,block-IIandblock-III.RGPPL电厂,印度国家电力集团的合资企业,有GE制造的6台燃机和3台汽机,采用2拖1的模式,三台机组分别称为I、II、III机组。Thoughthereare6numbersofGEmakegasturbinesbutall6gasturbinesarenotidenticalsofarthecapacity,TITandheatrateareconcerned.AsperthedataavailableatsiteandTracta
3、ble(ConsultanttoIndianlenders)report,thegasturbineofblock-IissupposetobePG9331andgasturbineofblock-IIandblock-IIIarePG9351version.AsperGEtechnicalliteraturePG9331isknownas9FA+andPG9351isknownas9FA+emodel.Fromthetechnicalliteratureavailableininternet,thetec
4、hnicalspecificationsof9FA+&9FA+eareasfollows:尽管有6台GE公司的燃机,但是到目前为止6台燃机的容量、透平入口温度、机组效率等不一致,根据机组收集的有用数据和印度的相关报告,I机组的燃机型号为PG9331,II、III机组的燃机型号为PG9351。按照GE的技术通报文件PG9331称为9FA+,PG9351称为9FA+e,从GE官方网站获取的9FA+和9FA+e参数如下:Itcanbeseenfromthetechnicalspecificationsmentio
5、nedaboveinthetablethattechnicallythereissubstantialdifferencebetweenPG9351andPG9331.ThoughBlock-IIandBlock-IIIgasturbinesofDabholPowerProjectaresupposetobePG9351butduetofailureofcompressorofGT2BandfailureoftierodofGT#3A,gasturbinerotorofGT#2Bhasbeenreplace
6、dwithsparerefurbishedrotorofblock-IandGT#3ArotorhasbeenreplacedwithGT-1B/1Ausedrotor.Therefore,withthepresentconfiguration,block-IIandblock-IIIconsistsofoneGTofPG9351andoneGTofPG9331version.从上表所述的关于PG9351和PG9331的不同点已很详细。尽管II、III机组为PG9351燃机,但由于发生了压气机事故的为GT#
7、2B和GT#3A的拉杆,燃机GT#2B转子更换为I机组的备用转子,GT#3A转子更换为GT-1B/1A使用过的转子。因此,目前的配置情况是,II和III燃机由PG9351和PG9331混合组成。TheentireplanthasbeenrevivedbyGEexpertsandundertheirsupervision.Notonlythis,beforestartingrevivalactivities,GEcarriedoutconditionassessmentofall6GasTurbinesand
8、basedonassessmentresultGErecommendedsparestobereplacedforhealthyrunningoftheplantandallthesparesrecommendedbyGEhavebeenreplacedduringtherestorationofrespectiveGasTurbine.整个计划在GE专家的领导和监督之下完成。除了这些,在检修完成之后再次启动前,