酸洗报土人E文档格式.docx
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酸洗报土人E文档格式.docx
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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
Motordrivedischargevalveofsuper-heater
DisplayonCRTaccordwithactualstatus,operatenormal
Motordrivestopvalveofeconomizerrecirculationpiping
8.1.2Inspectionofcleaningpumps
#1cleaningpump
Normalstartupandstop
#2cleaningpump
Cleaningpumpofeconomizer
8.1.3InspectionofI&
Cequipment
Waterlevelmeterofboiler
meterindicatecorrectly
Waterlevelmeterofdeaeratortank
Pressuregaugeof#1cleaningpumpoutlet
4
Pressuregaugeof#2cleaningpumpoutlet
5
Pressuregaugeofeconomizercirculatingcleaningpumpoutlet
6
Pressuregaugeofmakeupwaterpumpoutletofboiler
7
Pressuregaugeofsteamthatheatingcondensatewatertank
8
Pressuregaugeofcoolingwaterofeconomizercleaningpump
9
Lowrangelocalpressuregaugeofboilerdrum
10
Topwalltemperatureindictorsofboilerdrum
11
Bottomwalltemperatureindictorsofboilerdrum
12
Temperaturemeasuringdeviceontheeverywaterwall
8.1.4Inspectionlistsofboilerchemicalcleaningsystempriortocleaning
Installationofboilercleaningsystemiscompletedaccordingtodesigndiagram
Workingpressuretestofsystemisqualified.
Pressuregaugesofboilerdrumshouldbechangedtotemporarypressuregaugeswhichmeasuringrangeare0-1.0MPa.
Installationoftemporarytemperaturemeasuringdeviceshouldbecompletedandoperatenormal.
Coolingwaterpressureofeconomizercirculationcleaningpumpmustbemorethan0.3MPa。
Corrosioncouponandpipesampleshouldbehungintheboilerdrum.
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:
7.7Stopvalveofeconomizerinletheaderdrain(quantity:
7.8Stopvalveofeconomizerinletheaderacidcleaning(quantity:
7.9Stopvalveofeconomizeroutletheadernitrogenfilling(quantity:
7.10Stopvalveofpipebetweeneconomizeroutlet&
drumvent(quantity:
7.11Stopvalveofleftsidedrumbi-colournilometer(quantity:
3)
7.12Stopvalveofleftsidedrumelectricnilometer(quantity:
7.13Stopvalveofrightsidedrumelectricnilometer(quantity:
7.14Stopvalveofequalizerforwaterleveladjustmentsignal(quantity:
7.15Stopvalveofequalizerforwaterlevelalarmsignal(quantity:
7.16Stopvalveofequalizerforwaterlevelprotectionsignal(quantity:
7.17Stopvalveofequalizerforwaterlevelindicationsignal(quantity:
7.18Stopvalveofleftsidedrumpressuresignal(quantity:
7.19Stopvalveofrightsidedrumpressuresignal(quantity:
7.20Stopvalveofdrumacidcleaningpiping(quantity:
7.21Stopvalveofdrumchemicalfeedpiping(quantity:
7.22Stopvalveofdrumemergencydischarge(quantity:
7.23Stopvalveofdrumemergencydischarge(quantity:
7.24Stopvalveofdrumcontinuousblowdown
7.25Motordrivecontrolvalveofdrumcontinuousblowdown
7.26Motordrivestopvalveofdrumcontinuousblowdown
7.27Stopvalveofdown-comerdrainpiping(quantity:
4)
7.28Stopvalveofneighborboilerheatingdistributeheaderinlet
7.29Motordriverstopvalveofneighborboilerheatingdistributeheaderinlet
7.30Stopvalveofneighborboilerheatingdistributeheaderoutlet(quantity:
12)
7.31Stopvalveofneighborboilerheatingdistributeheaderdrain(quantity:
7.32Stopvalveofpipebetweendrum&
sideHRAvent(quantity:
7.33Stopvalveofpipebetweendrum&
7.34Stopvalveofsaturatedsteamsampling(quantity:
7.35Throttleofsaturatedsteamsampling(quantity:
7.36StopvalveofrearHRAlowerheaderdrain(quantity:
8)
7.37StopvalveofmiddleHRAupperheadervent(quantity:
7.38Stopvalveofprimarysuper-heaterinlet&
outletheaderdrain(quantity:
7.39Stopvalveofprimarysuper-heateroutletheader&
platensuperheaterinletheadervent(quantity:
7.40Stopvalveofplatensuper-heatermiddleheaderdrain(quantity:
7.41Stopvalveofplatensuper-heateroutletheadervent(quantity:
7.42StopvalveofFSHinletheaderdrain(quantity:
7.43StopvalveofFSHoutletheadervent(quantity:
7.44StopvalveofFSHoutletheaderpressuregauge(quantity:
7.4
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