135MW汽轮机检修规程 全英文版.docx
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135MW汽轮机检修规程 全英文版.docx
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135MW汽轮机检修规程全英文版
EnterpriseStandardofIndianRWPL8×135MWPowerPlant
QJWH—2009
MaintenanceManualofSteamTurbine
(TrialEdition)
PublishedonXX–XX2009ImplementedonXX–XX2009
Content
MaintenanceManualofSteamTurbine1
Preface4
VolumeISteamTurbine5
ChapterISteamTurbine5
Section1GeneralIntroduction5
Section2MainTechnicalSpecificationoftheSteamTurbine5
Section3RepairCycleoftheSteamTurbine6
ChapterIISteamCylinder7
Section1HP&IPOuterCylinder7
Section2HPInnerCylinder8
Section3NozzleBlockandHP&IPDiaphragm8
Section4LPCylinder9
Section5LPDiaphragm11
Section6HeatInsulationandCoverEnclosure11
Section7SlidingPinSystemandExpansionDifference11
ChapterIIIRotator12
Section1HP&IPRotator12
Section2LPRotator13
ChapterIVtheGlandSystem14
ChapterVBearing15
Section1ShaftSystemandSupportSystem15
Section2SafetyMonitoringoftheBearingandShaftSystem17
Chapter6valveandPipe18
Section1HPMainRegulatingValve18
Section2IPCombinedSteamValve19
Section3SupportingoftheValve19
Section4HP&IPmainsteampipeandthemainsteam&reheatingsteamextractionpipe19
ChapterVIITurningDevice20
Section1BriefIntroductiontotheStructure20
Section2FunctionoftheTurningdevice20
VolumeIIAuxiliaryMachines22
ChapterISteamCondenser22
Section1GeneralIntroductiontotheequipmentandtheequipmentspecification22
SectionIStructure23
Section3WorkProcess24
Section1EquipmentSpecification25
Section2Function&Structure25
Section3MaintenanceandProtectionoftheOxygenExtractor26
ChapterIIIHP-LPHeater27
Section1HPHeater27
Section2LPHeater28
ChapterIVPlate-typeHeatExchange29
ChapterVFilter30
Section1ElectricalWaterFilter30
5.1.3Workingprinciple31
5.1.5Maintenance32
Section2Coarse&FineOilCleaner32
VolumeIIIWaterPump35
ChapterIFeedWaterPumpSet35
Section1GeneralIntroduction35
Section2MainTechnicalParameters37
Section3StructureandWorkingPrinciple38
Section4Maintenance41
ChapterIICondensatePump45
Section1TechnicalSpecification45
Section2StructureofthePump45
Section3ServicingandMaintenance46
ChapterIIIVacuumPump50
Section1TechnicalSpecification50
Section2ServicingandMaintenance51
ChapterIVGeneral-purposeWaterPump52
ChapterVDisposaloftheCommonFailureoftheWaterPump56
VolumeIVSpeed-regulatingandLubricantSystem58
ChapterIGeneralIntroductiontotheSpeed-regulatingSystem58
Section1Instructions58
Section2BriefIntroductiontotheParts58
ChapterIIStructureAndWorkingPrinciple61
Section1OilServomotor61
Section2HPFire-resistantOilSystem62
ChapterIIILubricatingOilSystem65
Section1SummaryofSystem65
Section2OilPump66
Section3MainOilTank67
VolumeVvalvesection68
ChapterICommonKnowledgeonValve68
Section1Classificationofthevalves68
Section2SelectionoftheValve70
ChapterIIGeneralIntroductiontotheValve70
Section1GateValve70
Section2ShutoffValve70
Section4SafetyValve72
SectionVSelf-sealingValve72
ChapterIIICommonFailuresoftheValve73
Preface
ThismanualregulatesmaintainingspecificationforsteamturbineequipmentsofIndianRWPLpowerplantbywhichitcanincreasesafety,reliabilityandeconomicalefficiencyofallequipmentstoreachfulllifeofoperationallife.
ThismanualisapplicabletomaintenanceworkofsteamturbineequipmentsofIndianRWPLpowerplant.
Mainsourcesofstandards:
●PreliminarydesignmanualofBarmercirculatingfluidbedpowerplantproject
●Instructionsofallequipmentmanufacturers
●Bodyinstruction
●Instructionofsteamturbinestart-uprunning
Thismanualappliesto:
●Maintenancepersonnelofsteamturbine.
●Director,deputydirectorofMaintenanceDepartment;engineerspecialresponsibleforsteamturbineofMaintenanceDepartment;engineerspecialresponsibleforsafetyandtraining.
●Deputyplantmanagerofproduction,chiefengineer,headofproductionandtechnologydepartmentandengineerresponsibleforsteamturbine;Engineerspecialresponsibleforsafetyandtraining.
●Otherpersonswhocometoourplanttodorelatedsystemwork.
Editor
VolumeISteamTurbine
ChapterISteamTurbine
Section1GeneralIntroduction
N135-13.2/535/535-2typesteamturbineadoptedbytheplantisextrahighvoltage135MWtypedesignedandmanufacturedbyDEC(China)andissinglereheat,singleshaft,double-cylinderdouble-exhaust,andcondensingsteamturbine.Thesteamturbineismatchedwith135MWgeneratorand440t/hCFBboiler.
Unitshowstheunitarrangement.Theunitisapplicabletowithbaseload,whichalsocanbeusedasfrequencymodulationunit.
Steamturbineispermittedtooperateinalongperiodunder48.5~50.5Hz.Steamturbineisequippedwithlowspeedbarringgearwiththerotatingspeedof4.5rpm.
Forauxiliarysteamsystem,eachsetisequippedwithanauxiliarysteamheader.Whenunitisstartingup,auxiliarysteamissuppliedbymainsteam;inlowload,auxiliarysteamissuppliedbyreheatcoldsection;whenoperatingnormally,steaminauxiliarysteamheadissuppliedbythirdstageextractionsteam.Betweenauxiliarysteamheadersoftwoadjacentunitsoftheunit,thereisaclosedtube.Aftertheunitisputintoproduction,steamcanbemutuallyprovided.Auxiliarysteamismainlyprovidedforstart-upheatingofdeaerator,shaftseal,furnacebottomheatingetc.
Theunitisdouble-cylinderdouble-exhausttype.HP&IPpartsadoptHP&IPcylinderstructure.Becausesteaminletparameteriscomparativelyhigh,inordertodecreasethecylinderstressandincreasetheflexibilityofstart-upandshut-downandchangingloadoftheunit,HPpartisdesignedasdoublesheetcylinder;LPcylinderissymmetrybypasstypeandalsoadoptsstructureofdoublesheetcylinder.Inordertosimplifycylinderstructureanddecreasethermalstress,HP&IPvalveandcylinderareconnectedbypipe.HP&IPvalvesaresetupinbothsidesofHP&IPcylinder.
HP&IProtorsandLProtoradoptintegralforgestructure.
Steamturbineis31ststageimpeller.HPpartincludesaregulatingstageand8pressurestages.IProtoriscomposedof10pressurestagesandLProtoriscomposedof2×6pressurestages.
Lengthoveralloftheunitis13.5mandlengthoflaststagebladeis660mm.
CriticalspeedofHP&IProtoris1850rpm;CriticalspeedofLProtoris2116rpm.
ThrustdiscislocatedontherearpartofHP&IProtor.HP&IProtorandLProtorareconnectedbyrigidcoupling.LProtorandgeneratorrotorareconnectedbysemiflexiblecoupling.
Section2MainTechnicalSpecificationoftheSteamTurbine
1.Model:
N135-13.2/535/535-2
2.Type:
ultra-pressure,once-throughreheating,single-shaft,double-cylinderdouble-flowcondensingsteamturbine.
3.Power:
135MW
4.Maximumpower:
146MW
5.Ratedsteamparameter
Newsteam:
(beforetheHPmainstopvalve)13.24MPa/535℃
Reheatingsteam:
(beforethereheatstopinterceptorvalve)2.238MPa/535℃
Vacuum:
89Kpa(THAconditions)(designedtemperatureofthecoolingwater:
24℃)
6.Ratednewsteamflow:
398.9t/h
8.Modeofsteamdistribution:
fullyelectricregulation(valvemanagement)
9.Rotationdirection:
clockwisewhenviewingfromthesteamturbinetothegenerator.
11.Rotationspeed:
3000r/min
12.Criticalrotationspeedoftheshaftsystem:
(calculatedvalue)r/min
CriticalrotationspeedoftheHP&IProtator:
1850rpm
CriticalrotationspeedoftheLProtator:
2116rpm
Note:
thecriticalrotationspeedoftheelectromotorissubjecttothefigureprovidedbytheelectromotormanufacturer.
13.Throughflowstagenumber:
31stagesintotal,wherein:
HPsection:
1governingstage+8pressurestages
IPsection:
10pressurestages
LPsection:
2×6pressurestages
14.Feedwaterregenerationsystem:
2HPheater+4LPheater+1deoxidation
15.Glandsystem:
self-sealingsystem(SSR)
16.Dimensionofthesteamturbine(L×W×H)
14.0m×7.3m×7.5m(theheightmeansthedistancefromthehighestpointofthesuspensionringofthecommunicatingpipetotheoperationplatform)
17.Weightofthemainmachine
395t(includingHP&IPvalveanditsbracket,HP&IPmainsteampipeanditspedestalandsoon)
Section3RepairCycleoftheSteamTurbine
1.Majorrepairperiodofthesteamturbine:
onceeverythreeyears
2.Majorrepairlength:
30-35daysoverhaullife
3.Minorrepairperiodofthesteamturbine:
onceevery4-8monthsminoroverhaul
4.Minorrepairlength:
8-12days
ChapterIISteamCylinder
Section1HP&IPOuterCylinder
2.1.1StructureoftheHP&IPoutercylinder
TheHP&IPoutercylinderholdstheHP&IPstatorpartsliketheHPinnercylinder,nozzlechest,bladering,diaphragm,glandandsoonandconstitutestheHP&IPthroughflowpartofthesteamturbinetogetherwiththerotator.ThematerialoftheoutercylinderisZG15Cr2Mo1castwhichhasgoodhigh-temperatureperformance.Theweightoftheoutercylinderis33t(excludingtheboltandotheraccessories)andtheallowableworktemperatureisnogreaterthan566℃.
4HPsteaminletsentertheHPinnercylinderfromthemiddleoftheoutercylinder.TheHPsectionoftheoutercylinderhasbossesandflangesforfixingtheHPinnercylinder,therearetwoHPsteamoutletsunderthefrontend,thereisoneextractionopeningforJG1(#1HPH)behindtheseventhstageofthelowerhalf,theHPsectionhasflangesforinstallingthe1#bladering.TherearefourIPsteaminletsinthemiddleoftheoutercylinder(up,down,leftandright),andtheIPsectionhasflangesforinstallingthe2#,3#,4#and5#bladering.TherearetwoΦ
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