電站鍋爐酸洗方案(中英文版)

電站鍋爐酸洗方案(中英文版)電站鍋爐酸洗方案(中英文版)電站鍋爐酸洗方案(中英文版)xxx公司電站鍋爐酸洗方案(中英文版)文件編號：文件日期：修訂次數(shù)：第1.0次更改批準審核制定方案設(shè)計，管理制度目錄1工程概述projectintroduction 32酸洗目的Thepurposeofchemicalcleaning 33酸洗范圍Thescopeofchemicalcleaning 34酸洗方法Themethodologyofacidcleaning 45編制依據(jù)Preparationreferences 46酸洗應(yīng)具備的條件Prerequisitestochemicalcleaning 47化學(xué)清洗順序Chemicalcleaningsequence 98酸洗臨時系統(tǒng)Temporaryfacilitiesforchemicalcleaning 159安全預(yù)防措施Safetyprecaution 1610化學(xué)清洗后的工作Workafterchemicalcleaning…………1811化學(xué)清洗后廢水處理Chemicalcleaningwastetreatment 1912鍋爐清洗質(zhì)量指標boilercleaningqualityindex …20附表1用于化學(xué)清洗的主要器具和設(shè)備mainequipmentandtoolsforchemicalwashing 21附表2估計清洗體積volumeintheequipment(Estimation) 21附表3化學(xué)成分表ChecklistofChemical. 22附表4化學(xué)清洗的除鹽水預(yù)估量Demineralizedwaterestimationforchemicalcleaning 23附表5酸洗過程質(zhì)量控制見證表Qualitycontroltableforacidprocess 24附表6：化學(xué)清洗流程表FLOWCHARTCHEMICALCLEANINGBOILEREXECUTION 25附表7：酸洗系統(tǒng)流程圖FLOWCHEMICALCLEANINGBOILER 26附表8：閥門統(tǒng)計表LISTVALVESOPENANDCLOSESTATUBOILERCHEMICALCLEANING 27附表9：LISTOFEQUIPMENTCHEMICALCLEANING 28附表10：酸洗組織機構(gòu)表Acidcleaningorganizationtable 29附表11：重要危險因素清單Significanthazardfactorlist 30#鍋爐酸洗試驗技術(shù)措施Thetechniquestatementof1#boilerchemicalwashing1工程概述projectintroduction印度尼西亞Sumsel-52×150MW坑口燃煤電廠工程，鍋爐采用東方鍋爐股份有限公司生產(chǎn)的循環(huán)流化床、一次中間再熱、全鋼結(jié)構(gòu)、露天布置、自然循環(huán)汽包鍋爐。MinemouthCFSPPsumsel-52X150MWprojectIndonesia,BoilerprovidedbyDongfangboilerco.,LTDisofcirculatingfluidizedbed,areheat,all-steelstructure,outdoorlayout,andnaturalcirculationdrumboiler.2酸洗目的Thepurposeofchemicalcleaning酸洗是為了清除附著在鍋爐水管線或者蒸汽管線內(nèi)表面的雜質(zhì)，例如在設(shè)備生產(chǎn)或者安裝過程中產(chǎn)生在內(nèi)表面上的金屬碎片，氧化物，油，灰塵和金屬氧化物。以此來確保在鍋爐運行中水和蒸汽的質(zhì)量。這樣就為產(chǎn)生保護性的涂層Fe3O4打好了基礎(chǔ)。Fe3O4可以防止鍋爐內(nèi)部受熱面進一步生銹。Thepurposeistocleartheimpuritiesfrominnersurfaceoftheboilerwater/steampipeline,suchasmetaldebris,oxide,oil,dust,andmetaloxideproducedininnersurfaceduringequipmentmanufacturingandinstallation,andtoensurethewaterandsteamqualityofboilerwaterduringoperationandtoapplyafoundationtogenerateprotectivecoatingofFe3O4thatcanpreventfurthercorrosionofinnersurfaceatinnerboilerheatingsurface.3酸洗范圍Thescopeofchemicalcleaning清洗范圍包括有：省煤器，水冷壁，降水管和汽包中心線以下的部分Thesystemwillbecleaningare:Economizer,Waterwall,Partsunderthecenterlineofthesteamdrum/downcomerpipe.4酸洗方法Themethodologyofchemicalcleaning采用HCL鹽酸清洗工藝HCLcomplexationcleaningisadoptedforboileracidcleaning.5編制依據(jù)：Preparationreferences《火力發(fā)電廠鍋爐化學(xué)清洗導(dǎo)則》《ChemicalCleaningGuideforSteamPowerPlant》（DL/T-794-2012）鍋爐安裝說明書（62J-AM）BoilerInstallationmanual(62J-AM)鍋爐范圍內(nèi)汽水系統(tǒng)圖（62J711）Steam&WaterDiagram（62J711）蘇姆賽爾5合約sumsel5contract6酸洗應(yīng)具備的條件Prerequisitestochemicalcleaning酸洗準備工作結(jié)束，保溫完畢Preparatoryworkforacid-cleaningshallbecompleted,includinginsulation.除鹽水設(shè)備/水處理設(shè)備在運行中Demineralizedwaterplant/Watertreatmentplantisinoperation.化水車間設(shè)備調(diào)試完Thedemineralizedwaterplant(DMP)hasbeencommissioned.啟動鍋爐已調(diào)試完Theauxiliaryboilerhasbeencommissioned.把兩個直徑為?50mm，厚度為20mm的將水管孔板放到汽包里。Makeorificeplatefortwomaindowncomerputinsideofsteamdrumwithdiameter?50mm,platethickness20mm.臨時系統(tǒng)已經(jīng)做過的壓力試驗；所有的測試結(jié)果均符合標準。ThetemporarysystemhasmadeMPapressuretesting;allthetestresultsareuptostandard.臨時汽包水準儀已安裝好；臨時鍋筒液面指示器在酸洗階段使用。Thetemporarylevelgaugeofdrumhasbeeninstalled;thetemporarylevelindicatorofdrumisusedduringacidcleaningstage.在汽包液位線和地面化學(xué)清洗平臺之間的可靠通訊設(shè)備和水位監(jiān)測設(shè)備。Reliablecommunicationequipmentandwaterlevelmonitoringequipmentbetweendrumlevelpointandgroundlevelchemicalcleaningplatform.汽包內(nèi)的旋風(fēng)分離器在化學(xué)清洗期間不安裝。Thecycloneseparatorinsidethedrumisnotinstalledduringchemicalcleaning.包含PH值到的NH3和N2H2的除鹽水應(yīng)被注入到過熱器中。（在水壓試驗期間正常注入）ThedemineralizedwatercontainingNH3andN2H2withpHtoshouldbefilledtosuperheater(NormallyfilledduringHydrostatictest)beforeChemicalCleaning.不要在省煤器給水管上安裝止回閥。如果止回閥已安裝，請打開。DonotinstallTheCheckValveonthefeedwaterpipeoftheEconomizer,orenforceopenthecheckvalveifthecheckvalvehasbeeninstalled.關(guān)閉鍋爐取樣管道，加藥管道的一次和二次閥門Closetheprimaryandsecondaryvalvesofboilersamplingtube,dosingtube應(yīng)該先檢查汽包內(nèi)部，再開始化學(xué)清洗。TheinsideofsteamdrumshallbeinspectedpriorthechemicalcleaningstartedbyClient.直徑為?2”的旁路管道應(yīng)被安裝在臨時系統(tǒng)化學(xué)清洗泵的出口處（用于流速的調(diào)整）至少三片的測試板應(yīng)被放在汽包內(nèi)。Thebypasspipewith?2”willbeinstalledatchemicalcleaningpumpoutletoftemporarysystem(forflowrateadjustment),testplatewillbeputintheinsideofsteamdrumatleast3pcs.客戶必須見證測試板稱重和尺寸測量過程。ThetestplatesshallbeweighingandmeasurethedimensionwitnessesbyClient.試驗板的尺寸是20×10×3mm，此材料應(yīng)和鍋爐墻管20G類似。Thedimensionoftestplateis20x10x3mmthematerialshouldbesimilarwiththeboilerwalltube20G.汽包機務(wù)清洗在化學(xué)清洗之后。SteamDrumMehcanicalCleaningafterChemicalCleaning.在酸洗前。必須檢查和測試酸抑制劑。Theacidinhibitormustbecheckedandtestedinthelaboratorybeforeacidcleaning.輔助蒸汽聯(lián)箱具備使用條件theauxiliarysteamheaderisreadyforuse.臨時系統(tǒng)的焊接質(zhì)量應(yīng)和正式系統(tǒng)要求一樣Weldingontemporarysystemshouldbethesameasonpermanentsystem.酸洗檢驗的儀器具備好(實驗室儀器)Instrumentsandchemicalsforacid-cleaninghavebeenprepared.(laboratoryinstruments)酸洗所用的現(xiàn)場實驗室準備好Thesitelaboratoryforacidcleaninghasbeenprepared.酸洗工作人員(運行人員和化學(xué)分析人員)培訓(xùn)上崗。酸洗負責人員應(yīng)向酸洗工作人員解釋酸洗的程序和要求并學(xué)習(xí)有關(guān)安全知識Personnel(operatorsandanalyst)havebeenwell-trainedandassignedonthepost.Theengineerinchargeofacidcleaningshouldexplaintheprocedureandrequirements,andteachthemsafetyprecautionsandfirst-aidskillstothepersonnel.直接接觸酸堿的人員應(yīng)穿戴橡膠鞋、橡膠圍裙、橡膠手套，口罩和防護眼鏡?；瘜W(xué)清洗現(xiàn)場的消防設(shè)施應(yīng)完善可用，警告牌“有毒”、“危險”、“不能靠近”應(yīng)懸掛在明顯位置。Thepersonswhowillcontactdirectlytoacidoralkaline,shouldwearprotectiverubberovershoes,helmet，rubberapron,rubbergloves,respiratorandgoggles.Firefightingfacilitiesshouldbeavailableonthesite.Warningsignssuchas“Poisonous!”“Hazards!”“NoTouch”,shouldbehangedclearly.現(xiàn)場照明充足Theilluminationinsiteshallbesufficientandreliable.通訊工具和電話準備好（移動電話和座機）Communicationsavailable(mobilephones,walkie&talkie,andtelephone)現(xiàn)場檢修人員應(yīng)備齊搶修器材和工具，HCL清洗階段，現(xiàn)場必須有值班醫(yī)生，并在可能造成酸堿傷害的地方，準備有急救藥箱、自來水、棉布、吸濕棉、碘酒、燙傷膏、繃帶、洗眼液、含%硼酸的溶液Repairtoolsandmaterialsareavailableonsite.MedicalworkershouldbeondutythroughoutHCLcleaning.Tapwater,eyelotion,smellingsalt,tinctureiodine,burnhealingcream,bandage,washcloth,absorbentcottonand%boronacidsolutionshouldbepreparedatdangerousplaces.溶藥箱上搭設(shè)添加化學(xué)藥品的腳手架和平臺Ascaffoldshouldbesetupabovethedissolvingtankforaddingchemicals.清洗泵、取樣點和實驗室附近應(yīng)備有水源和橡膠管Watersourceandhoseshouldbeavailablenearcleaningpump,samplingpointsandlaboratory.所有酸洗所用化學(xué)藥品就緒，并經(jīng)過檢查符合標準，緩蝕劑試驗合格Allchemicalsforacidcleaninghavebeencheckeduptothestandards.Theinhibitorhasbeentestedgood.廢水池和廢水處理設(shè)備具備條件Twowastewaterpits,shallbeavailableandwell-equipped,readyforuse.臨時系統(tǒng)與正式系統(tǒng)連接完畢，循環(huán)泵至鍋爐的上水臨時管道、鍋爐至循環(huán)水泵的回水臨時管道水壓試驗合格，臨時蒸汽管道和臨時酸洗管道必須保溫Jointingoftemporarysteamsystemandnormalsystemhasbeenfinished.Forthewatersupplytemporarypipefromcirculatingpumptoboilerandthewaterreturningtemporarypipefromboilertocirculatingpump,thehydraulictesthavebeenpassed.Thetemporarysteampipeandtemporaryacidcleaningpipesmustbeinsulated.所有的正式系統(tǒng)和臨時系統(tǒng)閥門都已調(diào)試完畢并掛牌標明Allthevalvesintheacidcleaningsystemshouldhavebeentestedoperationalandtaggedout.臨時取樣系統(tǒng)應(yīng)裝有冷卻水裝置Coolershouldbefittedonthetemporarysamplingequipment.電氣供應(yīng)可靠Powersupplyshouldbeavailable.清洗系統(tǒng)中的壓力，溫度，流量測點均已校驗合格，具備投運條件(在化學(xué)清洗過程中，所有的正式儀器中，例如計量器，閥門等等，需要隔離)Measurementpointofpressures,temperaturesandflowsshouldbewellcalibrated,readyforuseinacid-cleaning(permanentinstrumentationlikegauges/valve/etsinmainboilerwillbeisolatedwhenchemicalcleaningprogress”)試片已經(jīng)準備完畢，且數(shù)據(jù)已經(jīng)測定，具備投用條件Theweighanddimensionsofthetestpiecesalreadymeasuredaccuratelyandputintheplaceoncleaningloop.7化學(xué)清洗順序Chemicalcleaningsequence鍋爐水沖洗—堿洗—堿洗后水沖洗---鍋爐酸洗--酸洗后的清洗--沖洗和鈍化Boilerwaterflushing—Alkalicleaning—Waterflushingafteralkalicleaning—Boileracidcleaning—Flushingafteracidcleaning—Rinsingandpassivation鍋爐水清洗BoilerWaterFlushing清洗流程：清洗罐--清洗泵--省煤器--鍋爐爐筒--水冷壁--臨時管道--雨水井Flushingprocessflow:Cleaningtank-CleaningPump-Economizer-boilerdrum-Waterwall-Temporarypipe-downdrainpit.7.2.1填充除鹽水箱到高水位，啟動注水泵注水到鍋爐，開始沖洗省煤器，鍋筒和水冷壁通過打開下爐膛下部集箱的排污閥排水。Filldemineralizedtanktohighlevel,Startfilling，waterpumptofillBoiler,FlushEconomizer,DrumandWaterwall,drainbyopeningblowdownvalvesoflowerfurnacelowerheader.7.2.2控制鍋筒的水位,讓其高于中心400mm-450mm。由專人控制鍋筒水位。Controlthedrumlevelabovecenterscale400mmto7.2.3取樣閥到傳送取樣之間的取樣明顯的清潔干凈，沒有懸浮的物質(zhì)，PH值6-8，渾濁度<30此時才允許停止沖洗，關(guān)閉排空閥Don’tstopflushinguntilthesamplefromsamplingvalveuntildeliverysampleisvisuallycleanwithoutsuspendedsubstance,pH6-8andTurbidity<30NTUclosethedischargevalve堿洗/脫脂過程AlkaliCleaning/Degreasingprocess.AlkaliCleaning/Degreasingprocess.7.3.1在清洗罐里分解下列化學(xué)成分，用清洗泵注入堿洗溶液按照酸洗的順序進行。7.3.1Dissolvethefollowingchemicalinthecleaningtank.Thefirstconcentrationofchemicalsusedinalkaliboilingoutstageasthefollowing:Usedthecleaningpumpfeedalkalicleaningsolutionasthesequenceoftheacidcleaning7.3.2在堿洗溶液沖洗上水給鍋爐后，調(diào)整汽包水位到正常的運行水位+450mm（從鍋筒中心點）。由專人控制水位，不要超過+450mm。7.3.2Adjustdrumleveltonormaloperationlevelstrictly+450mmfromdrumcenterpointafteralkalicleaningsolutionwashfeedtoboilerandspecialmantocontrolwaterlevelwillnotoverthan+450mm.7.3.3檢查鍋爐和臨時系統(tǒng)閥門的條件是否完好。注入化學(xué)材料%6000ppmTsp和%3000ppmDsp和%300ppm的化學(xué)凈化劑。7.3.3CheckboilerandtemporarysystemvalveconditionisOK.InjectChemicalMaterialTsp%6000ppmandDsp%3000ppmandDetergen%300ppm7.3.4在70℃到90℃的溫度下，保持循環(huán)時間為6到ContinueCirculationandStartinjectsteamforAuxiliaryboilerforHeating.7.3.4Keepcirculationtimefor6to8hrswithtemperature70to90°.7.3.5在鍋爐水里的化學(xué)藥劑濃度應(yīng)在堿洗階段定期分析。如果油量與酚酞堿度基本穩(wěn)定，停止循環(huán)。7.3.5Concentrationofchemicalagentinboilerwatershouldbeperiodicallyanalyzedduringalkalicleaningstage.Stopcirculationiftheoilcontentstableat2measure.堿洗后的水沖洗WaterFlushingafteralkalicleaning.當堿洗和排水結(jié)束，用清洗泵給鍋爐注入沖洗水thealkalicleaninganddrainageisend,fillflushingwatertoboilerbycleaningpump.完全打開排空閥。汽包水位由頂部臨時煮沸水位（+450mm）控制。openthedischargevalve.Thedrumleveliscontrolledatthetopofthetemporaryboil-outlevel(about+450mm).沖洗標準：直到供水干凈，沒有顏色和PH≤的雜質(zhì)。standard:untilthedeliverywaterisclearwithoutcolorandimpuritypH≤沖洗完成后，調(diào)整汽包水位在正常水位。aftertheflushing,adjustthedrumwaterlevelatthenormallevel.鍋爐酸洗BoilerAcidCleaning.7.5.1在鍋爐酸洗前，鍋爐水冷壁預(yù)熱調(diào)整在汽包中心點的水位+100mm。慢慢增加鍋爐水冷壁的溫度。監(jiān)管好爐壁和汽包的金屬溫度。在上部和下部（底部充滿水，上部沒有水）之間的汽包金屬溫度差距是不超過50度的。當鍋爐水冷壁管道金屬溫度達到50-70度時，停止加熱。所有的爐膛開口和氣閘都必須關(guān)閉以保存熱度。Boilerwaterwallpreheatingbeforeacidcleaning,adjustthedrumlevelatthecenterpoint+100mm.Raiseslowlytheboilerwaterwalltemperature.Superviseboilerwallanddrummetaltemperature.Thedrummetaltemperaturedifferenceisnomorethan500Cbetweenupperpartandlowerpart(bottompartwhichfilledwithwaterandupperpartwithoutwater).Whentheboilerwaterwalltubesmetaltemperaturereaches50~7.5.2在允許酸進入鍋爐前，檢查并確保所有汽包排空閥打開。排空管道的標高至少高于汽包頂部1m。Beforeadmittingacidtotheboiler,checktobesurethatalldrumventvalvesareopen.elevationventpipeatleast1m7.5.3鍋爐汽包中心點的水位應(yīng)嚴格保持在汽包水位計+100mm之內(nèi)，設(shè)專人監(jiān)控。如果出現(xiàn)汽包水位高于汽包水位計+100mmThelevelatcenterpointofboilersteamdrumshouldbekeptindrumlevel+100mm,andmonitoredbyspecialperson.Ifthereoccursthephenomenonthatsteamdrumlevelishigherthandrumlevel+100mm,reportimmediatelytogeneralcommanderandopentheemergencydrainwatervalveofsteamdrum.注入化學(xué)藥品和酸洗的流程圖Fillingchemicalandacidcleaningflowchart.7.6.1步驟：清洗罐--循環(huán)泵--省煤器--鍋筒--鍋爐水冷壁—水冷壁下聯(lián)箱-清洗罐StepCleaningtank?circulationpump?economizer?drum?-boilerwaterwall?lowerheader-cleaningtank.7.6.2開始：循環(huán)水泵，把水溫控制在50-60℃之間，調(diào)整中心點+100mm的鍋筒水位，清洗罐在低水位。Startonecirculatingwaterpump,controlwatertemperatureto50~60℃.Adjustdrumlevelatthecenterpoint+7.6.3用酸抑制劑清洗罐體，等一小時后，添加鹽酸。從返回管取樣，分析鹽酸濃縮物，鹽酸濃縮物少于4-7%重量。當鹽酸濃縮物在回氣管內(nèi)到達%以上時，開始記錄注入酸洗的時間，并且把清洗監(jiān)控器系統(tǒng)放在作業(yè)中。Fill0,3%acidinhibitortocleaningtank,waitfor1hourandthanaddHydrochlorideAcid.Takesamplefromreturntube.AnalyzedHydrochlorideAcidconcentration,theHydrochlorideAcidconcentrationislessthan4-7%wt.WhentheHydrochlorideAcidconcentrationinreturntubereachesabove%,beginthetimetorecordforfillingacidandputthecleaningmonitorsystemintooperation.7.6.4酸洗要求Acidcleaningrequirement.在注入酸后，控制高于中心點400±50mm鍋筒水位。通過輔助蒸汽加熱調(diào)整清洗溶液溫度到50-70℃.分析在回氣管內(nèi)溶液樣本的酸強度和鐵的濃縮物。定期記錄溫度。Controlthedrumlevelabovecenterpoint400±50mmafterfillingacid,Adjustcleaningsolutiontemperatureto50~70Cbyauxiliarysteamheating.Analyzedsolutionsampleforacidstrengthandironconcentrationinreturntubeandrecordthetemperatureperiodically.7.6.5酸洗結(jié)束時間預(yù)估持續(xù)運行循環(huán)泵6-8個小時。當亞鐵離子和鐵離子基本上沒有變化時，結(jié)束酸洗。鐵離子和鹽酸濃縮物檢查兩次（標準是當鐵離子和鹽酸濃縮物的分析結(jié)果到達定值2個測量點）。AcidcleaningendpointestimationRuntheCirculationpumpwithin6-8hourscontinuously.Endtheacidcleaningwhenthereisbasicallynochangeofferrousion,ferricionandHydrochlorideAcidconcentrationfor2timescheck(ThecriteriaiswhenanalysisresultofFeionandHydrochloricAcidreachedconstantvalueatthelatest2measurements)當監(jiān)控樣本管道內(nèi)的氧化鐵被清洗干凈時，結(jié)束酸洗。Endtheacidcleaningwhenironoxideofthemonitoringsampletubehasbeencleaned.酸洗后的沖洗Flushingafteracidcleaning.當酸洗結(jié)束后，進行沖洗，沖走亞鐵滓渣，氧化膜和殘余酸洗液體，這是化學(xué)清洗非常重要的一個階段。為了避免金屬表面酸洗后生成的著色，不要把金屬表面暴露在空氣中很長時間。在確認酸洗完成后，應(yīng)做下列工作：Flushafteracidcleaningisintendedtowashawaytheferrousdregs,oxideandremainingacidliquidandisanimportancestageofchemicalcleaning.Toavoidmetalsurfaceafteracidcleaningfromcreatingstaining,themetalsurfaceshouldbenotexposedintheairforalongtime.Afterconfirmingtheacidcleaningisover,thefollowingworkshouldbedone:7.7.1第一步，打開清洗罐底部的排污閥。排出全部留存在酸洗罐內(nèi)的清洗液體，并且用除鹽水沖洗清洗罐直到罐被沖洗干凈。關(guān)閉清洗罐底部的排污閥。Firstopentheblowdownvalveatthebottomofcleaningtank.Dischargethecleaningliquidinsidethecleaningtankcompletelyandflushthecleaningtankwithdemineralizedwateruntilthetankisclean.Closetheblowdownvalveatthebottomofcleaningtank.7.7.2給清洗罐供應(yīng)除鹽水Supplydemineralizedwatertocleaningtank7.7.3打開總體排水閥門，省煤器排水閥門，鍋筒事故放水閥門和臨時閥，迅速排出酸洗液體到廢水中和池。Opengeneraldrainvalve,economizerdrainvalve,drumemergencydrainvalve,bankmanifold,andtemporaryvalvetodischargetheacidcleaningliquidtounitwastewaterneutralizationpondrapidly.7.7.4在完全排出鍋爐內(nèi)的清洗液體后，沖洗鍋爐。Aftercompletelydischargingthecleaningliquidinboiler,flushtheboiler.7.7.5把水注入到清洗罐高水位，啟動清洗泵沖洗鍋爐。沖洗流程：清洗罐，清洗泵，省煤器，鍋筒，鍋爐水冷壁，臨時管道和廢水中和池到污水處理車間。Fillthecleaningtanktohighlevel,startcleaningpumptoflushboiler.Flushingflowpass:Cleaningtank,cleaningpump,economizer,drum,boilerwaterwall,temporarypipe,andunitwastewaterneutralizationpondtosewagetreatmentplant.7.6.6控制鍋筒水位線（在中心點以上400-500mm）Controldrumlevelabovethecenterpoint400~450mm.7.7.7從取樣閥拿出樣本，并分析樣本沖洗液體的鐵離子和PH值。當沖洗水的PH值=，鐵離子少于100mg/L和基本上沒有顆粒時，結(jié)束沖洗。在正常條件下，沖洗應(yīng)在4小時內(nèi)完成。TakesamplefromsamplingvalveanalyzingpHandironionofflushingliquid.TheflushingisoverwhenflushingliquidpH=~,ironionlessthan100mg/Landwithoutparticlesbasically.Theflushingshouldbefinishedwithin4hourinnormalcondition.漂洗和鈍化Rinsingandpassivation.7.8.1在完成沖洗后，循環(huán)方法應(yīng)如下列所述：清洗罐--循環(huán)泵--省煤器--鍋爐鍋筒--鍋爐水冷壁--清洗罐?？刂棋佂菜痪€（在中心點以上400-500mm）。通過調(diào)整輔助蒸汽壓力把溫度控制在40-45℃之間。Afterfinishingtheflushing,thecyclewaymustbeasfollow:Cleaningtank?circulationpump?economizer?boilerdrum?boilerwaterwall?cleaningtank.Controldrumlevelabovecenterlevelpoint400~450mm,controlthewatertemperatureat40~457.8.2漂洗：在清洗罐中添加沖洗化學(xué)品使沖洗液體增加%的檸檬酸。用NH3H2O把PH值調(diào)整到，保持50-60℃的溫度兩個小時。當亞鐵離子少于300mg/L時，結(jié)束次步驟。如果亞鐵離子多余300mg/L，用除鹽水代替沖洗液體，直到亞鐵離子少于300mg/L。Rinsing:Addingrinsingchemicaltocleaningtanktomakerinsingliquoradd%citricAcid.UseNH3H2OtoadjustpHpHto~,keepthetemperature50~60oCfor2hours.Whentheferrousionislessthan300mg/lthisstepcanend.Iftheferrousioni7.8.3鈍化：在沖洗后，用氨調(diào)整PH值到，并添加%的亞硝酸鈉。保持50-70℃的溫度4-6小時。Passivation:AfterrinsinguseammoniatoadjustthepHup-to~10,add%sodiumnitrite(NaNO2).Keeptemperatureat50~70oCfor4-6hours.7.8.4把鈍化液體排出到廢水中和池。打開鍋筒人孔讓其自然冷卻。打開人孔后，安全措施必須安排到位。Dischargethepassivationliquortounitwastewaterneutralizationpond.Openmanholesofdrumtocoolspontaneously,thesafetymeasuresmustbetakenafteropeningthemanholes.8酸洗臨時系統(tǒng)Temporaryfacilitiesforchemicalcleaning將定期排污匯流排電動門后母管斷開，用不小于Ф76×4的臨時管道與爐下零米臨時管道連接。ThemainpipeshouldbecutoffatthedownstreamoftheMOVfromintermittentblowdownheadertoflashvessel,andconnectedtemporarilywithapipeФ76×4asminimumtotheabovedrainpipeat0mfloorunderboiler.準備一個10m3Preparingachemicaldissolvingtank(10m3),andtwochemicalinjectionpumps.省煤器正式放水至定排的管路的疏水門后斷開，用臨時管與爐底的臨時排水管連接，此管道作為模擬試驗及酸洗后省煤器排廢液用Temperatureriset。Economizerdrainpipetointermittentblowdownflashtankshouldbecutofftemporarilyafterthedrainvalveandreconnectedtobottomdrainpipefordischargingwasteliquidfromtheeconomizeraftertestandacid-cleaning.與HCL清洗有關(guān)的法蘭墊應(yīng)耐高溫，臨時系統(tǒng)與設(shè)備要保證安裝質(zhì)量，焊口應(yīng)用氬弧焊打底，焊接時與正式系統(tǒng)同等對待。Alltheflangesandgasketsshouldberesistanttohightemperature.Allthetemporarysystemsandfacilitiesshouldbeinstalledfirmlyuptothestandards,byArgonarcwelding.Weldingshouldbeinspectedasperthesamestandardasforpermanentsystems.酸洗的臨時管要進行臨時保溫。Thetemporaryfacilitiesshouldbeinsulated.清洗系統(tǒng)中的臨時閥門應(yīng)選用優(yōu)質(zhì)產(chǎn)品。Allthetemporaryvalvesinthesystemtobeacid-cleanedshouldmeasureuptothestandard.(havegoodphysicalandchemicalproperties,meettherequirements)臨時管應(yīng)裝牢固可靠的支吊架，并考慮管道的熱膨脹。Thesupportsandhangersofthetemporarypipeshouldbefirmandsecure,withthermalexpansiontakenintoaccount.臨時蒸汽管及清洗臨時管打壓合格。Thetemporarysteam/waterpipesforacid-cleaningshouldpasshydrostatictestatworkingpressure.從輔汽聯(lián)箱上連接一根Φ89×的鋼管將輔汽引至溶藥箱，作為加熱汽源；要求裝兩道閥門，兩道門之間裝一塊壓力表，蒸汽管道上應(yīng)安裝一個DN40的疏水閥，管道必須保溫。Asteelpipe,Φ89×,istemporarilyconnectedfromauxiliarysteamheadertothechemicaldissolvingtanktosupplyheatingsteam.Ithastwovalvesfittedinseries,andamanometerbetweenthem.Italsohasdrainvalveinstalledatthelowestpoint.Thissteampipeshouldalsobewellinsulated.臨時系統(tǒng)的最低點加裝疏水管路及疏水閥，疏水排至安全處。Thetemporarysystemshouldhavedrainpipesandvalvesatthelowestpointtodischargewatertoappropriateplace.9安全預(yù)防措施Safetyprecaution化學(xué)清洗人員必須經(jīng)過合格的訓(xùn)練。準備齊全和充足的個人防護設(shè)備。個人防護設(shè)備包括：橡膠手套，橡膠鞋，防護性眼鏡和防護性面具。Thechemicalcleaningpersonnelmustbequalifiedtraining.Completeandenoughindividualguardgoodsareprepared.Theindividualguardgoodsmainlyincludes:rubbergloves,rubbershoes,protectiveglassesandprotectivemask.臨時沖洗水泵和1000kg的石灰粉應(yīng)在現(xiàn)場準備。Thetemporaryflushwaterpumpand1000kglimepowdershouldbepreparedatsite.化學(xué)清洗期間禁止在鍋爐上和本區(qū)域內(nèi)電焊，火源和煙。禁止清洗盤柜的高空作業(yè)。臨時實驗室和值班室負責阻止高空墜落事宜。Electricwelding,firesourceandsmokingareprohibitedontheboilerandinthefieldduringchemicalcleaning.Highaltitudeworkisprohibitedabovecleaningpanel,temporarylaboratorytestanddutyroomtopreventmattersdroppingfromhighplace.在化學(xué)清洗現(xiàn)場準備足夠的滅火泡沫和滅火器。用于緊急修改的材料的工具以及剔除缺陷的工具，例如，鋼絲繩，耐酸橡膠等需準備好。Enoughfoamandfireextinguishersshouldbepreparedforchemicalcleaninginfield.Thematerialsandtoolsforurgentrepairandeliminatingdefectsuchassteelwire,andacidresistantrubbershouldbeprepared.現(xiàn)場照明充足。Thelightingisenoughinfield.用彩色膠帶做成路障圍在鍋爐，泵房和清洗泵周圍。警示標牌需用顯著地文字標注，例如NOSMOKINGANDFIRE（禁止煙火），NOADMITTANCEEXCEPTONBUSINESS（閑人免進），DANGEROUSACIDLIQUID(危險酸性液體)Makebarricadefromcolortapearoundtheboiler,pumproomandcleaningtank,andthealarmingsignswithnotablewritingof“NOSMOKINGANDFIRE”“NOADMITTANCEEXCEPTONBUSINESS”“DANGEROUSACIDLIQUID“etc.在安裝完成后撤除所有在系統(tǒng)附近，通道內(nèi)或者樓梯內(nèi)的不必要的物品以保證通道暢通。Removeallunnecessarygoodsremainednearthesystemandintheaccessorstairafterthecompletionofinstallationtoguaranteeunblocksaccess.接觸酸和氨的人員應(yīng)提前通知，并穿上防酸工服和橡膠體罩，橡膠鞋，橡膠手套，防護性眼鏡和面具。Thepersonnelcontactingacidandammoniashouldbeinstructedinadvanceandwearacidresistantclotheswithrubberhood,rubbershoes,rubberglove,protectiveglassandprotectivemask.所有化學(xué)品都需檢查；抑制劑需要在現(xiàn)場小范圍內(nèi)試驗。Allchemicalsarequalifiedsubjecttocheck;theinhibitorisqualifiedsubjecttosmallscaletestinfield.現(xiàn)場應(yīng)有醫(yī)藥隊和急救人員在現(xiàn)場值班，以備急救治Thereshouldhavedoctorsorthemedicalteamwithnecessarygoodsandrescuingpersonondutyinfieldforfirstaidtreatment.嚴禁明火，尤其在酸洗期間。Therenoopenfireandstrictlyforbiddenduringacidcleaning.在上述條件都滿足后，由中電工組織并邀請DSSP一起對化學(xué)清洗前的安全措施進行檢查、督促以確保整個化學(xué)清洗過程的安全性。Aftermeetalltherequirementabove,CNEECorganizeworkers，andinviteDSSPtocheckandmonitorthesafetymattersbeforechemicalcleaningtoensurethesafetyofchemicalcleaningprocess.10化學(xué)清洗后的工作Workafterchemicalcleaning.按下表所述檢查化學(xué)清洗的質(zhì)量Checkingthechemicalcleaningqualityasthetablebelow:NO.Location/Area位置/區(qū)域Qt’y數(shù)量Description說明Remark備注1Downcomer降水管4Handhole降水管下部手孔Cutinlettempipe切掉入口管道2Steamdrum汽包3Testplate20x10x3mm測試版20x10x3mmPutleft,right,center放左邊，右,中心3Economizer省煤器1Visualcheck外觀檢查Cutpipe(length300mm)切掉管子(長度300mm)4Waterwall水冷壁1Visualcheck外觀檢查Cutpipe(length300mm)切掉管子(長度300mm)測試板應(yīng)稱重和測量尺寸。在化學(xué)清洗后客戶現(xiàn)場見證。ThetestplateshouldbeweighingandmeasurethedimensionandwitnessedbyClientafterchemicalcleaning.仔細檢查鍋筒和下聯(lián)箱中的殘渣和沉淀物，如果檢查有殘渣和沉淀物時應(yīng)及時清理干凈必要時用水槍手動沖洗。清理干凈后再邀請業(yè)主檢查。Cleaningcarefullytheslagandsplashingmaterialsinthedrumandlowerheaders.清除連接在永久系統(tǒng)上的臨時系統(tǒng)，在7天內(nèi)恢復(fù)永久性系統(tǒng)。Removethetemporarysystemconnectingwiththepermanentsystemandrestorethepermanentwithin7days.當完成化學(xué)清洗工作后應(yīng)在10-20日之間進行吹管。若超過20天后應(yīng)對系統(tǒng)進行防腐措施。Carryoutthesteamblowingafterfinishthechemicalcleaning10-20days.Whencompletethechemicalcleaning,steamblowingshouldbeconductedwithin10-20days.Ifexceed20days,thesystemshouldcarryoutthepreservation.11化學(xué)清洗后廢水處理Chemicalcleaningwastetreatment.鍋爐沖洗水直接排放到雨水井內(nèi)。鍋爐堿洗、酸洗和漂洗鈍化廢物通過臨時管道排到位于擴建端臨時開挖的廢液池內(nèi)，臨時廢液池容積約為3000m3（30m×40m×），臨時廢液池內(nèi)壁敷設(shè)土工膜以防廢液滲入地下。排放的廢液待酸洗結(jié)束后進行中和，當廢液處理達到PH值為6-9、懸浮物400mg/L時方可將處理合格的廢液排至就近的雨水溝道里。廢液池內(nèi)的沉淀物排到煤場通過鍋爐燃燒掉.Dischargedirectlytheflushingwaterofboilertorainingwaterwell.Dischargethewasteofboileralkalicleaning,acidcleaning,rinsingandpassivationtothetemporarywasteliquidpondbytemporarypipe,whichislocatedbesidetheextendedend.Thecapacityoftemporarywasteliquidpondisabout3000m3（30m×40m×2.5m）,whoseinnerwalliscoveredwithgeomembranetoavoidleakage.Neutralizethedischargingwasteliquidafterfinishtheacidcleaning.WhenthewasteliquidPHreaches6-9,andsuspendedsolidis400mg/L,dischargethequalifiedwasteliquidtothenearbyrainingwaterpit.Dischargethedepositinwasteliquidpondtocoalyardandburnthemthroughboiler.酸洗廢液排放指標Acidcleaningwasteliquordischargeindex序號No項目名稱Item最高允許排放濃度Maximumallowabledischargedensity1PH值6-92懸浮物TSS1003化學(xué)需氧量COD3504油oil255溫度temperature≤40℃酸洗廢液、沖洗水排放量統(tǒng)計表.Statisticaltableforwasteliquidofacidcleaning,andflushingwaterdischargevalue序號No酸洗程序Acidcleaning排放地點及排水量Dischargelocationanddisplacement備注Remark廢液池Wasteliquidpond1鍋爐水沖洗Boilerwaterflushing1402堿洗Alkalicleaning140m33堿洗后水沖洗Flushingafteralkalicleaning1404鍋爐酸洗Boileracidcleaning140m35酸洗后的清洗Flushingafteracidcleaning1406沖洗和鈍化Rinsingandpassivation140m37排放水量合計Displacementintotal104012鍋爐清洗質(zhì)量指標boilercleaningqualityindex清洗后的金屬表面應(yīng)清潔，基本上無殘留氧化物和焊渣，無明顯金屬粗晶析出的過洗現(xiàn)象，不應(yīng)有鍍銅現(xiàn)象。Themetalsurfaceaftercleaningshallbeclean,thereisnoresidualoxideandweldingspatteringeneral,thereisnoobviousmetalcrystallizationbecauseofovercleaning,thereshouldnotbecopperplating.用腐蝕指示片測量的金屬平均腐蝕速度應(yīng)小于8g/(m2·h)，腐蝕總量應(yīng)小于80g/m2，除垢率不小于90%為合格，除垢率不小于95%為優(yōu)良。Theaveragecorrosivespeedofthemetalwhichmeasuredwithcorrosionindicatorshallbelessthan8g/(m2·h),thetotalcorrosionshallbelessthan80g/m2,themetalwhosedescalingrateisnotlessthan90%isqualified,themetalwhosedescalingrateisnotlessthan95%isgood.清洗后的表面應(yīng)形成良好的鈍化保護膜，不應(yīng)出現(xiàn)二次銹蝕和點蝕。Thesurfaceaftercleaningshouldformwellpassivatedprotectingfilm,secondcorrosionandspotcorrosionshouldn’tappeared.附表1用于化學(xué)清洗的主要器具和設(shè)備mainequipmentandtoolsforchemicalwashingNo.Description說明Specification規(guī)格Qt’y數(shù)量Purposed用途1Steeltank鋼罐11unitMixingandcirculation攪拌和循環(huán)2Electricalpump電泵260m3H120m,160kw2unitCirculation循環(huán)3Pipevalvesandfitting管道閥門和金具Various各種1lotFortemporaryline.臨時管線4HandToolsandtestingequipmentVarious各種1lot附表2No.Area區(qū)域Volume體積Unit單位1Furnacewaterwall爐膛水冷壁m32EconomizerandFWline省煤器和FW管線m33Steamdrumanddowncomerpipe汽包和降水管m34Upperandlowercirculationtubes上部和下部循環(huán)管道3m35Temporarypipeandtank臨時管道和罐10m36Total(Estimation)總計（預(yù)估）140m3估計清洗體積volumeintheequipment(Estimation)附表3化學(xué)成分表ChecklistofChemical.No.Chemical藥品PurityofChemical化學(xué)純度Conczentrate濃度Qtykg（質(zhì)量）Purposed計劃1TrisodiumPhospate磷酸三鈉98%%8Alkalicleaning堿洗2DisodiumPhospate磷酸二鈉98%%423Detergent清潔劑100%%42kg4Acid鹽酸32%3-4%17500Acidcleaning酸洗5AcidInhibitor檸檬酸100%~%4206CitricAcid檸檬酸98%%147Ammonia(Na3H2O)氨25%%1700Kg8SodiumNitrite(NaNO2)亞硝酸鈉98%%1附表4化學(xué)清洗的除鹽水預(yù)估量DemineralizedwaterestimationforchemicalcleaningNo.CleaningStage清洗階段Waterquantity(ton)水的數(shù)量1WaterFlushing水沖洗2XVOL140ton2AlkaliCleaning堿洗1XVOL140ton3Waterflushingafteralkalicleaning堿洗后水沖洗2XVOL140ton4AcidCleaning酸洗1XVOL140ton5Waterflushingafteracidcleaning酸洗后水沖洗2XVOL140ton6Rinsingandpassivation漂洗和鈍化1XVOL140ton7Start-upboiler啟動鍋爐8Total總計(1260m3)附表5酸洗過程質(zhì)量控制見證表QualitycontroltableforacidprocessNo.Program程序Item項目Standard標準Interval間隔時間驗收簽字inspectionsignaturePT?PSMSEPCC3CNEECDSSP/PB1Waterflushing水沖洗Appearance外表Deliverywaterisclearwithoutandimpurity水透明，沒有雜質(zhì)30min2Alkalicleaning/Degreasing堿洗和脫脂OilContentandpH含油量和PH值DependofsystempH9~1270~90060min3FlushingafteralkaliProcess堿洗后的沖洗AppearancepH外表PH值Deliverywateristransparent≤水透明度≤930min4Acidcleaning酸洗HydrochlorideAcid%,Fe3+,Fe2+,0C