1009Boiler Steam Blowing Commissioning Procedure.docx

1009Boiler Steam Blowing Commissioning Procedure.docx

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1009BoilerSteamBlowingCommissioningProcedure

CommissioningProcedureforBoilerSteamBlowing

Page:

1of25

E07007

DocumentClass

1

CHENGDAENGINEERINGCORPORATIONOFCHINA

CHENGDAJOBNO.E07007

A

Forapproval

NOV.04,2008

ZhouZT

Rev.

Description

Date

Prepared

Checked

Reviewed

Approved

PT.PLN（PERSERO）

OWNER’S

DWG.NO.

PT.PLN（PERSERO）

JASASERTIFIKASI（LMK）

Client’sProjectNo.

PLTU2BANTEN-LABUAN（2x300MW）

Labuan,Banten,theRepublicofIndonesia

DWG.NO.

E07007-PR-TM-1009

ElectronicFileName:

DateofIssue:

RevisionNo.

NOV.04,2008

B

Thisdocumentisrestricted.NeitherhewholenoranypartofthisdocumentmaybedisclosedtoanythirdpartywithoutthepriorwrittenconsentofChengdaEngineeringCorporationofChina,inwhichthecopyrightofthisdocumentisvested.Allcopyrightsreserved.Neitherthewholenoranypartofthisdocumentmaybereproduced,storedinanyretrievalsystemortransmittedinanyformorbyanymeans（electronic,mechanical,reprographic,recordingorotherwise）withoutthepriorconsentofthecopyrightowner.

1.Purpose

Thepurposeofthisprocedureistoprovidethecommissioningprocedureforboilersteamblowing.

Theboilersteamblowingistoremovedepositeddebrissuchassand,weldingdregs,rustetc.insideSHtube,RHtubeandothersteampipewhilemanufacturing,transporting,storinganderecting.

2.Referencedocument

DrawingNO：

F289S-J0201B-04

3.Introductionofwater-steamsystem

Designedsteamprocessisasfollowing:

Drum→SH→mainsteampipe→mainsteambranchpipe→MSV→HPcylinder→RHinletpipe→lowtemp.RH→hightemp.RH→RHoutletpipe→MP/LPcylinder→condenser.

4.Safetyprecautions

1）Allparticipantsmustobeysafetyprinciples.

2）Interruptblowingoutonceemergencyhappen.Shutdownboilerifnecessaryuntilresolutionfound.

3）Makeadjustmentintimeonabnormalcondition.

4）Professionalsshouldensuredevicesafety.

5）Payattentiontowaterlevelcontrolofdrum.Opentemporaryvalvesatwaterlevelof-100mm.

6）Keepflammableandexplosiveawayfromtemporarypipeline.Setbandabout30mawayfromexit.

7）Designatespecialpersontooperatetemporaryvalves.

8）Payattentiontomaintenanceoftemporaryvalves.

9）Carryoutentirewarmingagainstwaterhammer.Closeallvalvesexceptdrainagevalvesslightopening.

10）PaycloseattentiontoHP/MPvalvesofturbineagainstleakage.

11）Keepfurnaceexitgastemperatureunder540℃.

12）CarryoutAHsoot-blowingper2hours.

13）Paycloseattentiontothermalexpansionandmakerecording.

14）Paycloseattentiontotemperatureofcylindercaseandcondenser.

15）Paycloseattentiontowaterlevelofdrumanddeaerator.Guaranteecontinuouschemicalwatergenerating.

16）Makemeasurestoavoidsecondpollutionwhilesystemrestoring.

17）Allrotarymachinesmustbemonitored.

18）Atleast2weeksbefore,ChengdashouldannouncetoPLNaboutsteamblowandPLNwillsocializationtocitizensatLabuanduetothenoiseofsteamblow.

19）Thedirectionofendofthetemporarypipeshouldbedirectedtothesea.

20）Barricadelineshouldbeputaroundthetemporarypipe.

21）Thetemporarypipeshouldbecoveredbyinsulationavoidtohotdangerous.

5.Preparationforsteamblowing

5.1Scopeofsteamblowing

5.1.1BoilerSH,mainsteampipe,RHinletpipe,RH,RHoutletpipe.

5.1.2HPbypasspipeline.

5.1.3Mainsteam,desuperheatingwaterpipe,RHaccident/minimspraypipeandsoot-blowingsteamsupplyingpipe.

5.1.4Turbineglandsteampipe,4#extractionsteampipeandinletsteampipeofBFPturbine.

5.2Steamblowingprocessandtemporarypipe

5.2.1Steamblowingprocessformainsteamandreheatedsteamsystem

Steamblowingprocessformainsteamandreheatedsteamsystemisasattachedfigure1,processisasfollowing:

Drum→SH→mainsteampipe→mainsteambranchpipe→MSV（blocked）→temporarybranchpipe→temporaryMVA&B→temporarypipe→RHinletpipe→collector→RH→RHoutletpipe→branchpipebeforeISV→ISV（blocked）→temporarybranchpipe→temporarypipe→targetplat→temporarypipe→atmosphere。

5.2.2SteamblowingprocessforHPbypassessystem

SteamblowingprocessforHPbypasssteamsystemisasattachedfigure1,processisasfollowing:

Drum→SH→mainsteampipe→HPbypasspipe→HPbypasstemporaryMVC→HPbypasspipe→RHinletpipe→collector→RH→RHoutletpipe→branchpipebeforeISV→ISV（blocked）→temporarybranchpipe→temporarypipe→targetplat→temporarypipe→atmosphere。

5.2.3Steamblowingprocessforboilerdesuperheatingwaterpipe

Steamblowingprocessforboilerdesuperheatingwaterpipeisasattachedfigure2&3.

DisconnectdesuperheatingwaterpipeatCV,andreplacewithtemporarypipe.Blowafter-valvesection5timesatblowingprophaseand5minutespertime,andflushbefore-valvesectionwhilefeedwaterbumpstarting.

5.2.4Steamblowingprocessforglandsteamsystem

Steamblowingprocessforglandsteamsystemisasattachedfigure4.

Process1：

BlowsteamturbineHP&LPglandsteampipes.

Aux.header→pipetoglandsteamheader→glandsteamheader→4branchpipeatHP&LPglandsteam→temporarypipe→atmosphere。

Process2：

BlowBFPturbineglandsteampipes.

Aux.header→pipetoglandsteamheader→glandsteamheader→BFPturbineglandsteampipes→temporarypipe→atmosphere.

Process3：

Blowthepipefrommainsteamtoglandsteamsystem.

Mainsteam→pipetoglandsteam→glandsteamheader→BFPturbineglandsteampipes→temporarypipe→atmosphere.

Process4：

BlowglandsteampipesbycoldRHsource.

ColdRHsource→pipetoglandsteamheader→steamblow→BFPturbineglandsteampipes→temporarypipe→atmosphere.

5.2.5Steamblowingprocessfromaux.steam,4#extraction,andmainsteamtoBFPturbine

Steamblowingprocessisasattachedfigure5&6.

Process1:

Aux.header→pipetoBFPturbine→temporarypipe→atmosphere.

Process2:

Aux.header→pipefrom4#extractiontoaux.header→pipefrom4#extractiontodeaerator→temporarypipe→atmosphere.

Process3:

Aux.header→pipefrom4#extractiontoaux.header→pipefrom4#extractiontoBFPturbine→temporarypipe→atmosphere.

Process4:

Aux.header→pipetodeaerator→temporarypipe→atmosphere.

Process5:

Mainsteam→pipefromRHcoldinlettoBFPturbine→temporarypipe→atmosphere.

5.3Collectors

Thecollectorshouldbemadeandinstalled.

5.4Temporarysystemandprecautionsduringblowingout

5.4.1BoilerSHandRHsystem

InstallblindpatchesprovidedbyturbinemanufactureatMSVsandISVstoisolateturbinecylinder.Thetightnessofpatchesmustbeguaranteedandverified.InstalltwoMVsattemporarypipeasshowedinattachedfigure1.InstalldebriscollectorinRHinletpipe.ReplaceHPbypassvalvewithatemporaryvalve.Installabarometeratinletandoutletofdebriscollector,aswellastemporarypipeexit.Installatemperaturegaugeattemporarypipeexit.

Temporarysystemisshowedasattachedfigure1.

5.4.2Thesteamblowingtemporarypipeinturbineisland

Thetemporarypipeforturbineglandsteamsystemsteamblowing,andforBFPturbineinletpipesteamblowing,andfor4#extractorpipesteamblowingrefertoattachedfigure4,5&6.

5.4.3Boilerdesuperheatingsystem

Disconnectdesuperheatingwaterpipeateachcontrolvalve,anddon’tinstallthesevalves.Installtemporarypipeandblowthembysteamandfeed-waterrespectively.

Temporarysystemisshowedasattachedfigure2&3.

5.4.4Otherdisposalandrequirementfortemporarypipeofsteamblowing

1）Alltemporarypipelinesbeforetargetplateshouldbebasedbyargonarcweld,betreatedbysandblastbeforeinstallationandbecarriedoutinnercleaning,finallyaccepted.

2）Thetemporaryvalvesshouldbecontrolledatcentralcontrolroom.

3）Thetemporarypipemustbehangedandsupportedreliablyandpermitthermalexpansion.

4）Thetemporarypipemustbeinsulated.

5）Drainagepipeandvalvesmustbeinstalledateachlowestpoint.

6）Disconnectthedrainagepipesfrommainsteam,RHsteam,andHP/LPbypasstoflashtank,andinstalltemporarypipestodrain.

7）Mechanicallypurgethepipeswhicharenotblown.

8）Avoidsecondpollutionduringthesystemrestoring.

5.4.5Noticeaboutglandsteamsystemblowingout

1）Dischargefilters.

2）Don’tinstallthedesuperheator.

3）Don’tinstallthecontrolvalvebetweenmain/auxiliarysteamandglandsteamheader.

4）Installblindpatchintheglandsteamheadersafetyvalve.

5）Installtemporarypipeatverticalsectionofglandsteampipeclosetoturbine.

5.4.6Noticeforauxiliarysteam,4#extractionandBFPturbinesystem

1）Installblindpatchbetweenauxiliarysteam（4#extraction）anddeaerator.

2）DisconnectvalvelevelleakageofHPcontrolvalvesandLPcontrolvalves.

3）Discharge:

twonon-returnvalves（NRV）betweenauxiliarysteamheaderandBFPturbine;twoNRVbetweenauxiliarysteamheaderanddeaerator;oneNRVcoreclosetodeaeratorbetween4#extractionanddeaerator;twocontrolvalvecoresbetweenauxiliarysteamheaderanddeaerator;BFPturbinesteamflowmeter.

4）Installblindpatchattheauxiliarysteamheadersafetyvalve.

5）BlindHP/LPsteamthrottlesofBFPturbine.

5.4.7NoticeforTurbineIslandblowing

1）Isolateothersystemswhileblowingoutonesystem.

2）Arrangedrainageatlowestpoints.

3）Carryoutpipewarminganddrainingduringblowingouttoavoidwaterhammer.

4）Carryoutdiscontinuousblowingthatismorethan3timestotallyuntilexitsteamisclean.Eachblowingmustkeep5~10minutes.

5）Parameterforauxiliarysteamandglandsteamsystemblowing:

Pressure:

0.6~1.0MP