135MW汽轮机检修规程 全英文版.docx

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