酸洗报土人E.docx
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酸洗报土人E
commissioningprocedure
Project：
TurkeyICDAS1×135MWUnit1
Section：
Chemistry
Title：
Boilerchemicalcleaning
Documentnumber：
TR-ICDAS-CP-CM-007
Revision：
0
Allrightsreservedinthisdocumentandtheinformationcontainedtherein.Reproduction,useordisclosuretothirdpartywithoutpriorwrittenpermissionisstrictlyforbidden
©HeilongjiangElectricPowerResearchInstitute,China.
TableofContents
1Objective4
2Scopeofwork4
3Acceptancecriteria4
4References5
5Prerequisites5
6Precautions5
7Testequipmentandmaterials6
8Procedure6
9VerificationandPostRequisites10
10Attachment11
1Objective
Toremoveprecipitateofironoxide,weldingscale,oil,rust,theboilershouldbecleanedbeforetheunitintegratedstartup,aswellastoensurequalityofwaterandsteammeetstandarddemand.
2Scopeofwork
Cleaningscopeincludeboilerdrum、waterwall、economizer、down-comertube,header.Thecorrelativesystemsareconsistedofchemicalsolutionsystem,cleaningsystemandchemicaldischargesystem.
Chemicalsolutionsystemschemeisasfollows:
Chemicalsolutiontank→chemicalsolutionpump→chemicalsolutiontank
Chemicalsolutiontank→chemicalsolutionpump→deaeratortank
Cleaningsystemschemeisasfollows:
Boilerdrum→down-comertube→bottomheader→waterwall→boilerdrum.
Boilerdrum→down-comertube→bottomheader→forcedcirculationcleaningpump→economizer→boilerdrum.
Chemicaldischargesystemschemeisasfollows:
Boiler→temporarypipe→wastewaterbasin→wastewatertreatmentsystem→discharge.
VolumeofCleaningsystemis110m3.
3Acceptancecriteria
3.1Thequalityoftheboilerchemicalcleaning
№
Checkitems
Criteria
Result
1
Corrosionrate
＜8g/（m2.h）
□
2
Surfaceofcleanedmetal
Surfaceofcleanedmetaliscleanness,therehavenoresidualoxideandweldingscaleonthewhole,andhavenocopperplating
□
3
Passivationfilm
Goodpassivationfilmisformedonthesurfaceofcleanedmetalandtherehavenosecondaryexternalcorrosionandpitting.
□
4References
4.1Boilersystemdiagram.
4.2Boilerinstallationandoperationmanual.
5Prerequisites
5.1Installationofallthetemporarypipesandequipmentswerecompletedinaccordancewithcleaningsystemdiagram.Weldingoftemporarypipesshouldfollowthequalitydemandofrealsystempipes.Takehydraulictestofworkingpressurebycleaningpump,toensurenoleakage.
5.2Systems,valvesandanalyzersthatnotattendcleaningshouldbeisolated.
5.3Pressuregaugesofboilerdrumshouldbechangedtotemporarypressuregaugeswhichmeasuringrangeare0-1.0MPa.
5.4Corrosioncouponandpipesampleshouldbehungintheboilerdrum.
5.5Motordrivedischargevalveofsuper-heatershalloperatesnormally,Motordrivestopvalveofeconomizerrecirculationpipingshalloperatesnormally.
5.6Dry-outofboilerfinished.
5.7Communicationandlightinsiteareallready，ifnot,thetemporarymeasureshouldbeprepared,workingpassageareunblocked,temporaryequipmentsusedininstallingperiodshouldberemoved.
5.8Analyticalreagentandanalyzerareallready.
5.9Recorderpaperusedinacidcleaningareallready.
5.10Topandbottomwalltemperatureindictorsofboilerdrumshalloperatesnormally,atemporarytemperaturemeasuringdeviceshouldbeinstalledontheeverywaterwallwhereheatloadisneartomaximumloadsoastomonitorifthetemperatureraisingrateofmetalsurfaceisuniformlyandtransfersignaltotemperaturescanner.
5.11Coolingwaterpressureofeconomizercirculationcleaningpumpmustbemorethan0.3MPa。
5.12Coolingwatersystemofsamplingsystemshouldoperatesnormallyandtrialrunofboilerdosingsystemshouldbecompleted.
6Precautions
6.1Personnelwhoattendcleaningshouldstudysafetyguideforchemicalandelectric.
6.2Electricequipment,chemicals,andwastewatershouldbetakenchargebyspecialperson.
6.3Preparedfirst-aidchemicalsforburnbyacidandcausticinsite.
6.4Providedsomefirefightingequipments.
6.5Electricswitchesandelectricequipmentshouldhaveevidencesign.
6.6Personnelwhoattendcommissioningshouldbefamiliarwithsystem,preventfromimproperoperation.
6.7Wearingsafetyhelmetwhencomeintosite.
7Testequipmentandmaterials
Preparedanalyzersandchemicalsasfollows:
pHmeter,burettestand,temperaturemeter,electricovenandsomeanalyticalreagents.
8Commissioningprocedure
8.1Inspectionofsingleequipment
8.1.1Inspectionofvalve
№
Description
checkitems
result
1
Motordrivedischargevalveofsuper-heater
DisplayonCRTaccordwithactualstatus,operatenormal
□
2
Motordrivestopvalveofeconomizerrecirculationpiping
DisplayonCRTaccordwithactualstatus,operatenormal
□
8.1.2Inspectionofcleaningpumps
№
Description
checkitems
result
1
#1cleaningpump
Normalstartupandstop
□
2
#2cleaningpump
Normalstartupandstop
□
3
Cleaningpumpofeconomizer
Normalstartupandstop
□
8.1.3InspectionofI&Cequipment
№
Description
checkitems
result
1
Waterlevelmeterofboiler
meterindicatecorrectly
□
2
Waterlevelmeterofdeaeratortank
meterindicatecorrectly
□
3
Pressuregaugeof#1cleaningpumpoutlet
meterindicatecorrectly
□
4
Pressuregaugeof#2cleaningpumpoutlet
meterindicatecorrectly
□
5
Pressuregaugeofeconomizercirculatingcleaningpumpoutlet
meterindicatecorrectly
□
6
Pressuregaugeofmakeupwaterpumpoutletofboiler
meterindicatecorrectly
□
7
Pressuregaugeofsteamthatheatingcondensatewatertank
meterindicatecorrectly
□
8
Pressuregaugeofcoolingwaterofeconomizercleaningpump
meterindicatecorrectly
□
9
Lowrangelocalpressuregaugeofboilerdrum
meterindicatecorrectly
□
10
Topwalltemperatureindictorsofboilerdrum
meterindicatecorrectly
□
11
Bottomwalltemperatureindictorsofboilerdrum
meterindicatecorrectly
□
12
Temperaturemeasuringdeviceontheeverywaterwall
meterindicatecorrectly
□
8.1.4Inspectionlistsofboilerchemicalcleaningsystempriortocleaning
№
Checkitems
Result
1
Installationofboilercleaningsystemiscompletedaccordingtodesigndiagram
□
2
Workingpressuretestofsystemisqualified.
□
3
Pressuregaugesofboilerdrumshouldbechangedtotemporarypressuregaugeswhichmeasuringrangeare0-1.0MPa.
□
4
Installationoftemporarytemperaturemeasuringdeviceshouldbecompletedandoperatenormal.
□
5
Coolingwaterpressureofeconomizercirculationcleaningpumpmustbemorethan0.3MPa。
□
6
Corrosioncouponandpipesampleshouldbehungintheboilerdrum.
□
7
Systems,valvesthatnotattendingcleaningshouldbeisolated,listsareasfollow.
7.1Motordrivegatevalveofmainfeed-waterpiping
□
7.2Motordrivestopvalveofmainfeed-waterbypass
□
7.3Motordriveadjustvalveofmainfeed-waterbypass
□
7.4Motordrivestopvalveofmainfeed-waterbypass
□
7.5Stopvalveoffeed-wateroperationdeskdrain（quantity:
2）
□
7.6Stopvalveofbeforefeed-wateroperationdeskmanometer&vent（quantity:
2）
□
7.7Stopvalveofeconomizerinletheaderdrain（quantity:
2）
□
7.8Stopvalveofeconomizerinletheaderacidcleaning（quantity:
2）
□
7.9Stopvalveofeconomizeroutletheadernitrogenfilling（quantity:
2）
□
7.10Stopvalveofpipebetweeneconomizeroutlet&drumvent（quantity:
2）
□
7.11Stopvalveofleftsidedrumbi-colournilometer（quantity:
3）
□
7.12Stopvalveofleftsidedrumelectricnilometer（quantity:
3）
□
7.13Stopvalveofrightsidedrumelectricnilometer（quantity:
3）
□
7.14Stopvalveofequalizerforwaterleveladjustmentsignal（quantity:
2）
□
7.15Stopvalveofequalizerforwaterlevelalarmsignal（quantity:
2）
□
7.16Stopvalveofequalizerforwaterlevelprotectionsignal（quantity:
2）
□
7.17Stopvalveofequalizerforwaterlevelindicationsignal（quantity:
2）
□
7.18Stopvalveofleftsidedrumpressuresignal（quantity:
2）
□
7.19Stopvalveofrightsidedrumpressuresignal（quantity:
2）
□
7.20Stopvalveofdrumacidcleaningpiping（quantity:
2）
□
7.21Stopvalveofdrumchemicalfeedpiping（quantity:
2）
□
7.22Stopvalveofdrumemergencydischarge（quantity:
2）
□
7.23Stopvalveofdrumemergencydischarge（quantity:
2）
□
7.24Stopvalveofdrumcontinuousblowdown
□
7.25Motordrivecontrolvalveofdrumcontinuousblowdown
□
7.26Motordrivestopvalveofdrumcontinuousblowdown
□
7.27Stopvalveofdown-comerdrainpiping（quantity:
4）
□
7.28Stopvalveofneighborboilerheatingdistributeheaderinlet
□
7.29Motordriverstopvalveofneighborboilerheatingdistributeheaderinlet
□
7.30Stopvalveofneighborboilerheatingdistributeheaderoutlet（quantity:
12）
□
7.31Stopvalveofneighborboilerheatingdistributeheaderdrain（quantity:
2）
□
7.32Stopvalveofpipebetweendrum&sideHRAvent（quantity:
4）
□
7.33Stopvalveofpipebetweendrum&sideHRAvent（quantity:
4）
□
7.34Stopvalveofsaturatedsteamsampling（quantity:
4）
□
7.35Throttleofsaturatedsteamsampling（quantity:
4）
□
7.36StopvalveofrearHRAlowerheaderdrain（quantity:
8）
□
7.37StopvalveofmiddleHRAupperheadervent（quantity:
2）
□
7.38Stopvalveofprimarysuper-heaterinlet&outletheaderdrain（quantity:
4）
□
7.39Stopvalveofprimarysuper-heateroutletheader&platensuperheaterinletheadervent（quantity:
4）
□
7.40Stopvalveofplatensuper-heatermiddleheaderdrain（quantity:
2）
□
7.41Stopvalveofplatensuper-heateroutletheadervent（quantity:
2）
□
7.42StopvalveofFSHinletheaderdrain（quantity:
2）
□
7.43StopvalveofFSHoutletheadervent（quantity:
2）
□
7.44StopvalveofFSHoutletheaderpressuregauge（quantity:
4）
□
7.4
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