FT8燃气轮机的事故分析和处理.ppt

FT 8燃机事故分析及处理 培训中心燃机培训课件 授课老师 柳志民 FT8燃气轮机事故分析和处理 事故概念直接威胁机组安全运行或使设备发生损坏的各种异常状态 FT8燃气轮机事故分析和处理 事故处理原则如果发现机组在运行时有异常 应根据相应的设备反映出来的现象及参数进行综合分析 予以判断 迅速确定事故原因 必要时立即紧急停运机组 防止事故蔓延和扩大在事故处理中 必须首先消除危及人身安全及设备的危险因素 充分评估事故可能对人身安全和设备危害的后果 及时 果断地进行处理在处理事故中牢固树立保护设备的观念 果断地按规程规定进行处理事故发生后 各岗位人员要服从值班长的统一指挥当设备故障原因无法得到判断时 按最严重的后果评估予以处理事故处理后 对事故进行详细记录和总结 FT8燃气轮机事故分析和处理 事故处理一般要求保证辅助滑油泵或事故滑油泵投入工作 压力正常 如因机组轴系故障引发的跳机事故 转速到零后 未对旋转部件进行检查之前不允许带转燃机 事故停机过程中应着重监视排气温度 滑油回油温度 轮间温度 以及各轴承振动和机组本体有无摩擦声 事故停机后应保证控制系统的直流电源供给 保证冷却系统继续工作 压力正常 FT8燃气轮机事故分析和处理 保证各加热器在自动位 燃机进口导叶在关闭位 燃烧室确已熄火 若机组因火灾保护跳机 在CO2释放期间严禁运行人员进入模块室内 并应保持模块室门关闭 通风扇在停止状态 机组保护遮断停机后 再次开机之前必需确认是否为误动作 如为误动作 应采限相应措施 处理误动作故障 紧急停机时 应先确认报警 消除音响 将报警信号保存在计算机中 未查明原因未排除故障时 不能复归报警 不能重新启动机组 FT8燃气轮机事故分析和处理 手动紧急停运依据机组发生故障 自动紧停保护拒动 机组运行中任一轴承断油 冒烟 机组内转动部件有明显的金属撞击声 机组振动突然明显的增大 机组发生喘振 滑油系统大量泄油 燃油管路爆管大量泄燃油 发电机励磁机冒烟 发电机出线电缆头 开关或避雷器爆炸 发电机电压互感器或电流互感器冒烟 燃油系统起火 不能及时扑灭 发 切换站燃油压力低 报警 控制室伴有强烈振动感 有功负荷大幅摆动 且这三种现象同时出现时 发生的故障可能严重危及人身设备安全的情况 FT8燃气轮机事故分析和处理 PBDotandFlameoutProtection FT8燃气轮机事故分析和处理 WhatIsPbdotandFlameout IndicationtheEngineHasLostProperCombustionCanOccurinAllorOnlySomeofBurnerCansPbdotTriggeredbyBurnerPressureRateofChange0 025BelowIdleand0 034AboveIdleFuelModValveOpenTooMuchforGivenEngineAirFlow Speed WhyHavePbdotandFlameout SafetyUnburnedFuelPresentIfNoCombustion FT8燃气轮机事故分析和处理 WhatActionShouldbeTakenafterPbdotorFlameout ReviewHighSpeedDataLoggerAutomaticallySavedAfterTripReviewTrendsTrendCutRate 1cut sec MayBeTooSlowContactYourCustomerServiceManagerIncludeDataLoggerFile orTime DateandUnitOfTrip HowtoRetrieveDataLoggerandViewItFilesStoredAtF inetpub ftproot Datalogs ViewinControlAssistantWoodwardDataAnalysisProgram FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 InterpretingPbdotandFlameoutEventsTooMuchWaterWaterFlowMeterWaterPressureTooMuchAirBleedsFailedClosedatLowPowerTooLittleFuelFuelFlowMeterModValveDemandandFeedbackFuelPressureIndividualEGTTrendsIdentifyWhichBurnerCansFlameoutWhatHappensFirst DetermineWhatIsCauseandWhatIsReaction FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 PbdotandFlameoutLessonsLearnedInsufficientGasPressureSOV1404LeakGasFuelExitsToDrainBleedsClosedAtLowPowerSB06M02OffersBleedDuctTempstoHelpTroubleshootWaterInjectionSystemFuelModValveCommunicationCollisionsBeingWorkedbyWoodwardNewapproachinstalledatnewersites FT8燃气轮机事故分析和处理 TROUBLESHOOTINGLOWGG PTLUBEOILSUPPLYPRESSURESAND ORHIGHGG PTSCAVENGEPRESSURES FT8燃气轮机事故分析和处理 PT612 GGLubeOilSupplyPressure InletPressureforHydraulicPump NormalOperatingRange40 50PSIG LowAlarm 38PSIG Trip 35PSIG NH 8200 3 PointCurveBelowSynch Idle Trip 5PSIG 2550NH 22 5PSIG 6800NH 35PSIG 8200NH FT8燃气轮机事故分析和处理 LowPT612 BadMainOilPump MOP LeakingMOPO rings MisadjustedPDCV602 CollapsedSupplyHose BV619NotFullyOpen Leaks VP601AdjustedforMoreVacuum 5 Hg DuringWindmillingCanCausePT612togoBelow1 5PSIGWindmillingAlarm ErraticPT612 GearboxPRVNotDefeated AdjustedFullyClockwise BadPDCV602 FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 PT625 GGLubeOilScavengePressure NormalOperatingRange20 25PSIG Alarm 40PSIG Driveback 75PSIG BypassImminent F607 Alarm 90PSIG AffectedbyDownstreamRestrictions F607 CV601 AC601 Hoses orLeakingMOPO ringBetweenPressureandScavengeElements InhibitedScavengingCouldResultinFloodedBearingCompartmentsandCarbonSealLeaks FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 PT616 PTLubeOilSupplyPressure NormalOperatingRange60 70PSIG Alarm 45 WillStartStandbyACPumpifNotFailed CDB 55PSID HigherofPT620andPT621minusPT616 Trip 20PSID HigherofPT620andPT621minusPT616 ControlCommandsSOV603toChooseHigherofPT620 PT621 NOTE UnitsforPT616 PSIG andPT620 PT621 PSIA MustbeMadeCommonbyAdding14 7toPT616orSubtracting14 7FromPT620 PT621 FT8燃气轮机事故分析和处理 LowPT616 BadPTPumpElement ReliefValve MisadjustedPDCV601 CollapsedSupplyHose BV618NotFullyOpen StickyCheckValveonDischargeofStandbyACPumporDCPump LeakingShaftSealonStandbyACPumporDCPump Leaks FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 PT620 PT 7LubeOilScavengePressure NormalOperatingRange5 9PSIA AlarmandCDBBasedonaCurvevs NLR HighPT620 Leaking Damaged orCollapsedHoses LooseFittings IncludingSenseLines BadPTPump LeakingChipDetectorO Rings Leaking 7CarbonSeal FT8燃气轮机事故分析和处理 PT621 PT 8 9LubeOilScavengePressure NormalOperatingRange10 15PSIA AlarmandCDBBasedonaCurvevs NLR HighPT621 Leaking Damaged orCollapsedHoses LooseFittings IncludingSenseLines BadPTPump LeakingChipDetectorO Rings Leaking 8or 9CarbonSeals AlsoSeeSB01M01 FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 HYDRAULICSTARTPACHINTS PT101 HighPressure NormalSetPoint4800PSIG HighPT101Limit 5300PSIG LowPT101and orNHDuringStart PumpPressureLimiter Compensator RequiresAdjustment ReturnCheckValveNotSeatedonOppositeGG TWINPACOnly CreatesLeakPath LossofPressure InsertTypeValvesLocatedinManifold HighPT101PriortoStartCommand PumpPressureLimiter Compensator Misadjusted SwashplateNotGoingBacktoNeutral FT8燃气轮机事故分析和处理 PT102 ChargePressure NormalSetPoint350PSIG LowPT102Limit 250PSIG LowPT102 AdjustChargePressureReliefValve AllFT8 sShouldHaveScrewAdjustablePRV s NotShimType OrientationofPumpisNottheSameasinManual PRF 6 00 FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 WHATCAUSESLOSSOFOILWHENGGISNOTRUNNING WhenPTPumpsAreRunning andGGIsNotFired ScavengeDischargeOilFromthePTPumpsCanBackupIntotheGGScavenge BreatherSystem IndicatesThatCV601And orSOV604AreNotOperatingCorrectly PT625TrendIsanIndicatorPT625ShouldNotIncreaseWhenPTPumpsStart RunandZeroNHIfPT625Increases CV601LeakingandSOV604NotOpen IfPT625 0Psig ThenSOV604IsOpenSOV604andVP601ShouldOpen RunConcurrentlyLubeSystemOn GGNotFiredInspectBreatherHose VP601CanisterforOilIfVP601GetsOil bound CanCrackImpeller Note OilFromBreatherPressureCannotBeReused TestHaveShownIttoBeTooAcidic OilFromGearboxSealLeakCouldBeReused IfFiltered FT8燃气轮机事故分析和处理 FT8燃气轮机事故分析和处理 WHATISTHEDIFFERENCEBETWEENPT628 PDT629BREATHERPRESSURES WHATDOTHEYMEAN HOWISTE607RELATED FT8燃气轮机事故分析和处理 PT628 MeasuresGearboxPressure AffectedbyDownstreamRestrictions OME602 BV601 Etc Alarm 3PSIG Driveback 5PSIG Trip 8PSIG PDT629 True BreatherPressure DifferentialPressureTransducerNotAffectedbyDownstreamRestrictions HighLegCommonWithPT628 LowLegatBreather