第二次技術(shù)澄清廠家答復(fù)-noor iii文件-電氣description for air

AIRCOOLEDFUNCTIONALDESCRIPTIONFORAIRCOOLEDCONDENSER空冷凝汽器功能描述TABLEOFRELATEDS相關(guān)文 GENERALDESCRIPTIONOFTHESYSTEM系統(tǒng)總體描 MAINCOMPONENTSOFACC空冷系統(tǒng)主要組 PHILOSOPHYOFTHESYSTEM系統(tǒng)原 GENERALDEFINITION一般定 NUMBERINGOFVALVESPIPESANDMEASURINGCIRCUITS閥門道測量回路編 ACCFUNCTIONALGROUPS空冷功能 DUCT排汽管 Instrumentation儀 Philosophyofthesystem系統(tǒng)原 Alarmsandtrips和跳 CONDENSERWITHFANUNITS帶有風(fēng)機(jī)組的凝汽器 Instrumentation儀 Philosophy原 Alarmsandtrips和跳 Start-upandshut mendations啟動(dòng)和停機(jī)建 CONDENSATESYSTEM凝結(jié)水系 DRAINPOTDRAININGSYSTEM疏水坑疏水系 AIREXTRACTIONSYSTEMTOBECONFIRMEDBYCLIENT抽真空統(tǒng)(由業(yè)主確認(rèn) 3.5.1Description描述3.5.2Instrumentation儀器3.5.3Philosophy原理3.5.4Alarmsand和跳閘錯(cuò)誤!未定義書簽。START-UPANDSHUTDOWNSEQUENCE啟動(dòng)和停車次 Start-upSequence啟動(dòng)次 Shutdownsequence停機(jī)順 Plantinstandby OPERATIONMODE(PRELIMINARY-操作模式(初步 AUTOMATICMODE自動(dòng)操作模 MANUALOPERATIONFROMCONTROLROOM來自控制間的LOCALMODE就地模式(byClient由客戶操作 ACCCONTROLSYSTEM空冷控制系 TURBINEBACKPRESSURECONTROL汽機(jī)背壓控 Instrumentation儀 Philosophy原 Therulesofthestep-switching開關(guān)步驟規(guī) ABNORMALPLANTOPERATIONSPLANTTRIPSSUMMARY操作-工廠跳閘 56MAINTENANCEOFTHESYSTEM 57GENERALCOMMENT概 DAILYMAINTENANCE每日 57 57MONTHLYMAINTENANCE每月 58 58ANNEX1:ACCPRESSURECONTROLPRINCIPLE附件1：空冷壓力控制原 ANNEX2:ACCFANSCONTROLSTEPS附件2：空冷風(fēng)機(jī)控制步 ANNEX3:ACCVALVESCONTROLSTEPS附件3：空冷閥門控制步 ANNEX4:INSTRUMENTATIONLIST附近4：儀表 60RELATEDS相關(guān)文Rev版號Description描述-FanControlsteps--AP&ID–&condensatesystem-AP&ID–Airtake-off&cleaningsystem-Instrumentationlistperfunctional-Importantnotes重要ThisfunctionaldescriptionismadeforthetwoUnits.ForUnit1,thefirsttwodigitsare“01”.ForUnit2,thefirsttwodigitshastobereplacedby“02”.本功能描述適用于兩臺機(jī)組。當(dāng)用于1號機(jī)時(shí)，首兩位數(shù)字為“01”；當(dāng)用于2號Refertodrawings _DWG0030and _DWG0032forscopeofsupply.供貨范圍參閱圖紙DWG0030和DWG0032GENERALDESCRIPTIONOFTHESYSTEMMAINCOMPONENTSOFACCs數(shù)Description描述TAGNUMBER簽6Street(s--1Mainduct主蒸汽管21TurbineExhaustBox--3100Vacuumpumpsskidforholding01MAJ21hogging01MAJ2201MAJ23定負(fù)荷1Cleaningskidpump泵01PAH21perstreetofthestreet列號123453Primarymodule(s順流（初級）01MAG901MAG901MAG92SecondaryorMixed01MAG901MAG9101MAG942/condensateheaderspermoduleβofthemodule單元號=1234s數(shù)Description描述TAGNUMBER簽--101MAG9PHILOSOPHYOFTHESYSTEM系統(tǒng)Theair-cooledcondenser(ACC)condensestheturbineexhaustorthede-superheatedfromtheturbinebypassbyrejectingtheheattotheThecondenserconsistsof6"A"roof-typestreetsoffinnedtubeelements.Eachstreetcontains5modules(3primaryand2mixedmodules).Eachmodule(01MAG9AN00β)iscomposedof10bundlesoffinnedtubes.空冷凝汽器由6列“A”型屋頂型翅片管排構(gòu)成。每列管排包含5個(gè)單元（3個(gè)一單元和2個(gè)混合單元）。每個(gè)單元(01MAG9AN00β)10片翅片管束構(gòu)成AnaxialflowfanlocatedunderneaththeroofforcesthecoolingairthroughtheTheflowsthroughonelargediameterduct01MAG90BR001tothecondenser.Theductsystembranchesinto2risers(01MAG90BR002/003)、6forks(01MAG9BR001)and distributionmanifolds(01MAG9BR002/003/004/005)runningalongthetopofeachstreet.entersfromthisdistributionmanifoldintothefinnedtubesatthetopoftheprimarycondensing(01MAG90BR002/003)、6個(gè)支管(01MAG9BR001)和頂部蒸汽分配管BR002/003/004/005)。蒸汽通過分配管進(jìn)入順流管束的翅片管About85%ofthe iscondensedduringthedownwardflowinthetubesoftheprimarybundles(andcondensate:co-currentfromtoptobottom).Condensateandremainingarecollectedinlargesize headersrunningalongthebottomofthe"A"roof.Theremaining (ca.15%)entersthefinnedtubesofthesecondaryheaders.Thedeflegmentesincounterflowmodeandnon-condensablegasesflowupwardswhilethecondensateflowsdownwardtothe/condensateheaders.Inthisway,thecondensateisalwaysheatedbyandsub-coolingisThenon-condensablegasesaccumulatenearthetopofthecondensingbundlesandaredrawnintotheairtake-offmanifoldsrunningalongthetopofthesesecondarybundlesThesemanifoldsareconnectedtothevacuumsystemthroughairtake-offlinesinordertoremovethenon-condensablegasesfromthecondenser.Thecondensate,whicharecollectedinthe/condensateheaders,drainbygravitytotheTurbineExhaustBox(TEB),whichistheextensionoftheturbineexhaustdevice,fromwhereitispumpedbythecondensateextractionpumpstotheboilersystem.InsideofTurbineExhaustBox,condensatesaredispersedinordertoreheatitGENERALDEFINITION一般定義Term術(shù)Definition定義outof21邏Acontrollogiconparameter(i.e.temperature,pressure,level,…)measuredby2instrumentsisvotinga1outof2logicwhentheDCS,whichreceivesthesignalsoftheseinstruments,surveysthemforoutofrangeortooimportantdifferencebetweenthetwoIfthe2signalsareinthemeasuringrangeandthedifferencebetweenthemdoesn’texceedagivendifferencethemeasurementsareconsideredasvalid.Anaverageonthetwomeasurementsismadewhichleadstotheaction(s)(control,alarm,trip,…)Shouldasignalbedetectedasoutoflimits,itisrejectedandaDCSalarminformsoperatorofthesystemfault.Onreceiptofthesinglefailure,theDCStripvotingsystemusestheremaininghealthy如果測到超范圍信號，則系統(tǒng)會(huì)并且DCS會(huì)向作員。一收到單一故障信號 觸發(fā)選擇系Term術(shù)Definition定義Ifbothsignalsfailorifthedifferenceexceedsthegivenvaluetheoperatorwillreceiveafurtheralarmtoindicatethatameasurefailurehasoccurredandthecontrollogicwillassumethefailedstate.、Term術(shù)Definition定義outof32邏Acontrollogiconparameter(i.e.temperature,pressure,level,…)measuredby3instrumentsisvotinga2outof3logicwhentheDCS,whichreceivesthesignalsoftheseinstruments,comparestheminordertoascertaintheir行3選2的控制邏輯。當(dāng)DCS接收到這些信號Ifall3signalsarevalid,theaction(alarm,trip,…)isvotedbasedontheaverageofthe3signals.取動(dòng)作(、跳閘…)Shouldasignalbedetectedasoutofrangeortoodifferentfromthetwoother,itisrejectedandaDCSalarminformsoperatorofthesystemfault.Onreceiptofthesinglefailure,theDCStripvotingsystemusestheremaininghealthysignalsona1outof2logic大，則該信號會(huì)被放棄并且DCS會(huì)向操作員系故障。一但收到故障信號，DCS系統(tǒng)按21SeerelevantACCFUNCTIONALGROUPS空冷功能組TheACCconsistsofthefollowingfunctionalgroupsDescription描述Tagnumber編號組condenserwithfanunit01LCA9xAirextractionsystem01MAJ9xCleaningsystem系01PAH2x DUCT排汽管s數(shù)Description描述SizeTAGNUMBER號1Mainduct主蒸汽1Thermalexpansionbellowgroup1TurbineexhaustboxTEB)--301MAG96Lateraltypethermalexpansion01MAG96Hingetypethermalexpansion01MAG96distributionmanifolds)蒸汽01MAG901MAG901MAG901MAG9Rupturedisc(s)s數(shù)Description描述SizeTAGNUMBER號3Mainductpressuretransmitter(s)forMonitoring&controlAlarmTripaction--01MAG9001MAG9001MAG901--3Mainducttemperatureelement(s)forMonitoring&controlAlarmTripaction--1-Instrumentation儀Pleasereferto“Instrumentationlistperfunctionalgroup”[K- _LIS6402latestrevision].請參照文 版按照功能組劃分的儀表Philosophyofthesystem系統(tǒng)Theturbinebackpressureismeasuredbythepressuretransmitters01MAG90CP101/102/103onthemainduct01MAG90BR001andservestocontrolfanoperation(seesection6.1).Incaseofoverpressure,thetransmittersuseavoted2outof3logic,sendingtheturbinebackpressuretotheDCSandclosingthebypassvalvesandcausingthetripoftheturbine.Thetemperatureelements01MAG90CT301/302/303servestoprotectthecondenseragainstoverheatingbyclosingthebypassvalvesandcausingthetripofthe汽機(jī)背壓由主蒸汽管道01MAG90BR001上的壓力變送器Composite-typerupturediscsareusedforprotectingACCfromanoverpressureconditionwhencontrolfailstosolvetheproblem.Thediscsaredesignedtoexplodeandprovidefull-openingandinstantaneouspressurereliefandallowthedischargeofflowrateincaseofhighpressure.的設(shè)計(jì)目的是在壓力過高時(shí)完全，將高壓的蒸汽流瞬時(shí)排放出去。Basedonthehypothesisgiveninthedesignnoteforrupturediscs(please§1.0),4rupturediscs(1)ofDN750havetobeinstalledonthe設(shè)計(jì)計(jì)算考慮了膜設(shè)計(jì)說明給出的假設(shè)(請參考§1.0)，在空冷凝汽器上得安 個(gè)DN750的膜(1)incaseoftheturbineisalreadyprotectedbysomerupturediscs(TOBECONFIRMEDBYDESIGNINSTITUTE),thisnumbermaybereducedconsequentlyAlarmsandtrips和跳閘(Preliminary初步TAG號Set設(shè)定作AlarmtoDCSDCSAlarmtoDCSDCSCloseallbypassturbinetripAlarmtoDCSDCS(2out(■)Closeallbypassvalves關(guān)閉所有蒸汽旁路閥(■)turbine0Overtemperatureinduct癈Overtemperatureconsecutivetime(■)Inordertoavoidoscillatory0Overtemperatureinduct癈Overtemperatureconsecutivetime

Figure2Seeparagraph2.4General3Seeparagraph2.4GeneralTurbinetripshallbedefinedbyturbinerandactivatedbyinstrumentsinstalledonturbineorTEB. CONDENSERWITHFANUNITS帶有風(fēng)機(jī)組的凝汽器Thecondenserismadeoffinnedtubesassembledinbundlesandgroupedinmodules.Fansprovidethecoolingairflow(oneforeachmodule).PrimarymodulesandSecondaryorMixedmodulesareequippedwithEachfanunitisequippedwithavibrationswitchtoprotectagainstunacceptablevibrationofthefan/gearbox/motorunit.Setpointforvibrationswitchisadjustedtoumsensitivityduringcommissioning.Eachgearboxisfittedwithapressureswitchtoavoidoperationwithoutlubrication,alevelgauge(ordipstick)tochecktheoilcontentandatemperatureelement.每Themotorforeachunitisequippedwithtemperatureelementstoprotectagainsttoohightemperatures.數(shù)SizeTAG號6xPrimary(4)module(s)初級單11525x01MAG901MAG901MAG96xMixed(5)module(s)混合單11525x01MAG901MAG9Permodule每單元βofthemodule單元號=1234510000/9200--132ft/975401MAG91132kW/1-1AlarmandTrip--01MAG91OilpressureswitchAlarmandTrip--01MAG91--01MAG91--01MAG91Fanmotorspace--01MAG95Mixedmodules混合單元modulesmadeofprimaryandsecondarybundlesdephlegmator數(shù)SizeTAG號3Motortemperatureelementforhighspeedonwinding1,2,3for:Controland--01MAG901MAG901MAG9Instrumentation儀Pleasereferto“Instrumentationlistperfunctionalgroup”[K- _LIS6402latestrevision]. Philosophy原TheinstrumentsprovidedwiththefansarehardwiredtotheDCSfortripactionsandalarmpurposes.風(fēng)機(jī)的儀表與DCS通過硬接線相連以備跳閘和MoreinformationonfanswitchingforACCcontrolphilosophyisavailableunderchapter6.0-ACCCONTROLSYSTEM.TAG號Setvalue01MAG9Setpointforvibrationswitchisadjustedtoumsensitivityduringcommissioning.AlarmtoDCSDCSTRIPtheconcernedfan’smotor相關(guān)TAG號Setvalue01MAG9AlarmtoDCSDCSTRIPtheconcernedfan’smotor相關(guān)01MAG9AlarmtoDCSDCS01MAG901MAG901MAG9AlarmtoDCSDCSTRIPtheconcernedfan’smotor相關(guān)Start-upandshut mendations啟動(dòng)和停機(jī)建Thepressureswitchestripsandalarmsareinactiveduringfanstart-upforaperiodof5to15seconds(adjustablewithinthesoftwareandadjustedduringResetofvibrationswitchisdonemanuallyonsitebytheThecompleteorderstart/stopsequenceofthefanswillfollow _DES6403latestrevision–Fancontrolstep”(later)designnoteinordertohaveahomogenouscoolingandavoidfreezing. revision–風(fēng)機(jī)控制步驟”(暫定)設(shè)計(jì)說明，以均勻冷卻避免冷凍。如果齒輪箱油溫低于(暫定)電機(jī)跳閘Ifgearbox’soiltemperaturereaches(later),ahightemperaturealarmissenttotheoperator.Ifgearbox’soiltemperaturereaches(later),thefanmotorisCONDENSATESYSTEM凝結(jié)水系統(tǒng)CondensatesfromtheAirCooledCondenserarecollectedandconductedbygravitytotheTurbineExhaustBox(TEB)locatedunderneathturbine,whichhasanextensiontocollectthem.DRAINPOTDRAININGSYSTEM疏水坑疏水系Thecondensatescollectedatthelowestpointofthemainduct(01MAG90BR001)arecollectedinaDRAINPOTonthemainductandthentransferredtotheTurbineExhaustBox(TEB)bygravitythroughpi01MAG90上的疏水坑，然后在重力作用下通過管道01MAG90BR050.輸送至排汽裝置。Description描述Theairhastobeevacuatedfromthecondenserbeforecanbeintroducedinthesameforcondensation.Forhoggingpurposethree100%(holdingcapacity)vacuumpumps(01MAG21/22/23AP001)areprovided.Eachofthosepumpsaredesignedfor133kg/hairatnominalpoint.When“hogging”(duringstart-up),therequirementistolowerthepressureasquicklyaspossible.Inthiscaseallthreepumpsarerequiredtodecreasefromatmosphericpressureto34kPain40minutesand14kPain60minutes.RemarkInwinterconditions(temperaturelowerthan-3°C),thelowestvacuumaspossible(about6kPa)mustbereachedpriortheintroductioninordertolimitfreezingproblemsatstart-up.備注：在冬季（溫度低于-3°C），在蒸汽引入之前，要盡可能達(dá)到最低真空度（6kPa）以在啟動(dòng)時(shí)限制結(jié)冰現(xiàn)象的When“holding”(duringnormaloperation),noncondensable,whicharecomingfromairingressandoxygencontentin andcondensate,mustalsobeextractednormallybyonepump.Ideallythecontrolshouldalternatethepumpskidsforholdingfunctions.Thiswillprovideevencyclingtimeontheskidsandpreventthecustomerfromrunningoneskidmuchmorefrequentlythantheother空氣在正常情況下必須用一或二臺泵抽出。理想情況下,維持真空階段,真空泵交替Underspecialconditionssuchaslowpartialload/deepvacuum,unexpectedhighairleakageresultinginamajortemperaturedifference(above10°C)betweentheexhaustturbinetemperatureandallair-takeofftemperaturemeasurement,thesuctioncapacitycanbeimprovedbyusing2vacuumpumpssimultaneously.在特殊情況下，如局部真空，未預(yù)料的過高的空氣導(dǎo)致排汽汽機(jī)溫度和所有的 以上），可以通過同時(shí)使用兩臺泵加大抽空能力。Remark:Inthenextpageofthis ,askidwillrefertoavacuumpumpsetwiththefollowingdevices,whichmustbecontrolledorwiredtothecontrolsystem.(xintheTAGnumber=1forskidA,2forskidBand3forskidC):空泵設(shè)施。（在號中的x=1指泵組A，2指泵組B，3指泵組C）。1pressureindicator01MAJ2xCP501atskidinlet/泵裝置1個(gè)壓力1pressureindicator01MAJ2xCP503atvacuumpumpinlet/泵1個(gè)壓力1pressuretransmitter01MAJ2xCP101atskidinlet/泵裝置1個(gè)壓力變1waterringvacuumpumpanddrivemotor01MAJ2xAP001/1個(gè)水環(huán)真空1separator01MAJ2xBB001/一個(gè)分離液位1separatorleveltransmitter&switch01MAJ2xCL101/一個(gè)分離箱液位2temperatureindicators01MAJ2xCT501/502atinletandoutletofheatexchanger/換熱器各1個(gè)溫度計(jì)1flowswitch01MAJ2xCF101onheatexchangerdischarge1swingcheckvalve01MAJ2xAA501/11make-upwatervalve01MAJ2xAA0801/Instrumentation儀器認(rèn)Pleasereferto“Instrumentationlistperfunctionalgroup” _DES6402latestrevision]. Philosophy原理ThevacuumsystemcanbestartedwhenThecoolingsystemisinThevacuumpumpstobeoperatedhavebeenThewaterlevelinthepumpseparatorsissufficientlyhigh(betweenminimumandumlevel)泵分離器的水位足夠高（介于最低和最高水位之間 Holdingoperation(onevacuumpumpinoperation). Duringcertainoperationcases,2vacuumpumpsshalloperatesimultaneously.DuringHogging,all/condensateisolationvalvesareopenedcorrespondingtostep00(seeDES6403–FanControlStep)Whenasuctionpressureofabout8kPato15kPa(adjustable)isreached(onpressuretransmitters01MAG90CP101/102/103)Unitsaresettoholdingposition(1or2Incaseofstart-upinwintercoldconditions,ACCstreetshavetobeisolatedasrequired(andcondensatevalvesclosed)beforeinjection.在建立真空時(shí)，所有的蒸汽/冷凝水閥按照步驟00的要求打開（DES6403-風(fēng)機(jī)控制步驟當(dāng)真空泵抽氣壓力達(dá) 8-15kPa（可調(diào)的）時(shí)，（在壓力變送器01MAG90如果冬季冷態(tài)啟動(dòng)，在蒸汽進(jìn)入之前關(guān)閉所有蒸汽/冷凝水閥，已完成對空冷管列的.Thepackageunitsaresettoholdingpositionbyshuttingdownthestand-byvacuumpumps(2outof3pumps).Thesuctioncapacitycanbeimprovedbyusing2vacuumpumpssimultaneously,underspecialconditionssuchas:Lowpartialload/deep在特殊情況下可以通過同時(shí)運(yùn)行2臺真空泵提高吸力，如：未預(yù)料的大量空氣 Asageneralrule(tobeconfirmedduringcommissioning),secondvacuumholdingpumpshallbeautomaticallyputintooperation:whenmajortemperaturedifferencebetweenexhaust extractiontemperature注意通常規(guī)定（需在試運(yùn)行期間確認(rèn)），當(dāng)發(fā)生下列情況時(shí)，第二臺真空泵或－結(jié)冰情或－汽機(jī)背壓低于13kPa（可調(diào)或－排汽和抽空之間的溫度差異Valves(01MAJ2xAA001)mustbeopenedafterthevacuumpumpfortheappropriatepackageunitisstarted.在適于成套設(shè)備的真空泵啟動(dòng)后，閥門 AA001)必須打開Valves(01MAJ2xAA001)mustbeclosedbeforethevacuumpumpfortheappropriatepackageunitisswitchedoff.在適于成套設(shè)備的真空泵關(guān)閉前，閥門(01MAJ2xAA001)必須關(guān)閉CLEANINGSYSTEM系統(tǒng)（暫定Ahigh-pressurewatercleaningsystem(approx.8MPa)isprovidedtorestoreperformancebycleaningthefinsurface.Onehigh-pressurepumpwithamotorprovidesthecleaningwaterflow.Distributionlinesconveythewatertoeachroofside.Onequick-linkconnectiononeachstreetdistributedalongtheroofconnectsthedistributionpi.Aflexiblehoseconnectsthedesiredcleaningheaderset(upper,middleandlowerheader)fixedtothemovableaccessladders.置1套高壓水系統(tǒng)（約8Ma），通過翅片表面恢復(fù)凝汽冷卻性能。水源由一臺帶電機(jī)的高壓水泵提供。分配管將水輸送至各個(gè)屋頂側(cè)。各列沿屋頂分布快接接頭，與分配管連接。通過軟管把需要的噴頭裝置（上、）數(shù)Size小TAGNUMBER1Cleaningsystemwatersupply11x100pump1motor電機(jī)--11Safetyreliefvalve(s)安全閥77Cleaningsystemwaterofthestreet列號123456Instrumentation儀Pleasereferto“Instrumentationlistperfunctionalgroup” _DES6402latestrevision]. ThisparagraphgivesgeneralprincipleforwatercleaningofACCFormoredetailedprocedure,pleaserefertothe“Cleaningsystemprocedure”(see§1).ThedistributionlinesarefirstpurgedforairDraincleaninglinevalveischeckedclosedandallventcleaninglinevalvesareopened.Wateriskeptflowingthroughthedistributionlinesuntilnomorebubblescomeoutatthetop(thisisperformedstaticallywithwaterdatapp.3bar(g)atTP91).Thispurgeisveryimportantasairpocketsmaycausewaterhammerlateron,whichmightdamagethepumpandthepi.OncethepurgeissatisfactorytheventcleaninglinevalvesmaybeTheselectedcleaningheadersetisconnectedtothenearestoutletviathehigh-pressurehosepipe.Onlyoneofthethreeheaders(upper,middleorlower…)isopenatatimeviathecorrespondingvalve.Thepumpmaynowbestarted.Thepumppressuremaybefinelyadjustedthroughthepressureregulatingvalve.Oncewaterisejectedathighpressureviathenozzlestheladdermaybemovedalongslowly(approx.1m/minute).Threepassageswillberequiredforthethreeheaderstocleanthetotaltubelength.We mendturningthepumpoffbeforetheflexibleisdisconnectedpriortoproceedingwithcleaningwithanotherexchangerWhencleaningisfinishedallcleaningventlinevalvesandthecleaningdrainlinefreezing.Afterallwaterisdrainedoutofthepitheventsmaybeclosed.Frequencyofthecleaningistobedefinedonsite.Itmayvaryfromonceamonthtoonceayearfromsitetositedependingonthesurroundingatmosphere.Ahighdustcontentandairhumidityarefavourableforfinfouling.Seasonalchangesinthefoulingspeedoffoulingmayalsobeobserved. Whencleaningbundlesabovetransformerorhighervoltagelines,specialattentionshallbetakentolimitthewaterflowingontheseequipments.Moreover,transformervendorshallconfirmthatcleaningwaterrainisnotaffectingsafeoperationofhighvoltagetransformerandsystem.注意：在時(shí)，如管束下有變壓器或高壓線，要特別注意限制水流到這些設(shè)備上，同時(shí)變壓器供貨商應(yīng)確認(rèn)水流不會(huì)影響高壓變壓器和系統(tǒng)的安START-UPANDSHUTDOWNSEQUENCEThesearegeneralsequences;pleaserefertospecificparagraphformoredetailedStart-upSequence啟動(dòng)次Thesearegeneralsequences;pleaserefertospecificparagraphformoredetailedprocedures.以下是概括的次序，詳細(xì)過程請參考具體段落。AllmanualvalvesandventsareclosedaccordingtoPID按照PIDDWG0030/32，所有手動(dòng)閥和Allsealwaterlinesareopen,ifany.的話，所有的密封水管開啟Themaincondensateexhaustdevicesarefilledwithmake-upwaterpH9)tonormallevel.用補(bǔ)充水（PH=9）將主冷凝水抽氣裝置充注到正常水位。Thecondensercontrolsystemisplacedatthestep00(seeDES6403–Fanallisolatingvalvesopened.門控制工序）(暫定)所有風(fēng)機(jī)停止并且所有蒸汽閥打開。condensate/airtake-offlinesshallbefullyopen(Step00).開（工序00）。Allvacuumunitsareactivatedandrununtilapressureof34kPaatminimumonpressuretransmitters01MAG90CP101/102/103onmainductsisCP101/102/103達(dá)到最低34kPa的壓力。BeforeadmissionintheACC,thecondensercontrolsystemshallbeplacedinStep00(→allisolatingvalvesareopened)Oncetheplantisreadytosupply,isinjectedintothecondenserviatheturbinebypassvalves.ACCmaystartslowlyat34kPa.34kPa壓力下緩慢啟動(dòng)。Stopof2vacuumpumpsoutof3maybedecidedwhenairtake-offtemperaturehassufficientlyrisen(seeNote1).Atthismoment,selectedholdingunittakesover(tobedecidedbyother).Theautomaticfancontrolisreleasedstartinginstep00(all valvesopenedandallfansOFF-SeeDES6403/6404).laterInnon-freezingmode,steps0to(later)areDuringhoggingoperationall condensate/airtake-offlinesshallbefullyopen(Step00).開（工序00）。Allvacuumunitsareactivatedandrununtilapressureofpreferably6kPaatminimumonpressuretransmitter01MAG90CP101/102/103onmainductisreached.CP101/102/103達(dá)到最低6kPa的適宜壓力。BeforeadmissionintheACC,thecondensercontrolsystemshallbeplacedinStep0(→allisolatingvalvesareclosed).OncetheplantisreadytosupplyandACCinStep0,isinjectedintothecondenserviatheturbinebypassvalves.Stoponeofthethreevacuumpumpsmaybedecidedwhenairtake-offtemperaturehassufficientlyrisen(seeNote1).Theautomaticfancontrolisreleasedstartinginstep0(all valvesclosedandallfansOFF-SeeDES6403/6404).(later)DES6403/6404）。(暫定Note注解feymsdardsonnchheumsrokn,enudtts,tcg20%ml flowlotrtk-fts01MAJ9T301302ett0°Caeb.sstowfrceervanbfenrasgtetdtoeos.dthismttevsttorcksdrretlxtn.如果系統(tǒng)真空破壞導(dǎo)致停機(jī)過程加長，應(yīng)稍慢注入蒸汽，蒸汽流量不超過額定流量的20％，直到大多數(shù)的抽出空氣溫度01MAJ9CT301/302至少超過環(huán)境溫度10°C以上。這是為了在增加冷凝器熱負(fù)荷之前讓全部空氣排空。事實(shí)上，此同一溫度證明沒有氣包（冷區(qū)）存在。Freezingweatherstart-up:冰凍氣候條件下Duringfreezingweather,thecondensershallbebroughttotheminimumpressurebeforeinjectionof,preferably6kPa.The flowhastobeincreasedasquicklyaspossibleuptothedefinedminimumflow在冰凍氣候條件下，在注入蒸汽前冷凝器要實(shí)現(xiàn)最低6kPa更適宜的壓力狀態(tài)。蒸汽流ColdstartisNOTallowedatambienttemperaturesbelow16°Cprelim.)Incasestart-upoccursatambienttemperaturebelow15°Canalarmshallbesenttotheoperator.當(dāng)環(huán)境溫度低于-16°C(初步)時(shí)不允許冷啟動(dòng)。當(dāng)環(huán)境溫度低于-15°C啟動(dòng)時(shí)，系統(tǒng)會(huì)向Whenanisolatedstreetisopenedthespeedoftherunningfanofbundlesisslowdownautomaticallyinordertocompensatetheheatexchangesurfaceincrease.當(dāng)一個(gè)列打開時(shí)，運(yùn)行管束下的風(fēng)機(jī)速度自動(dòng)下降下來以補(bǔ)償熱交換表面增加。Whenhighairleakageissupposedandminimum1timeperweek,theairingressintothecondensershallbecheckedwiththevacuumpumpsstoppedandisolated(seevacuumdecaytest,procedurePRO7706).當(dāng)將發(fā)生大量空氣泄漏，并且每周至少一次，要在真空泵停止和的情況下檢查冷凝器的空氣泄漏。（見真空衰減測試，程序PRO7706）。Shutdownsequence停機(jī)順Thecondensingcapacityisreducedautomatically(stepswitch)astheflowtothecondenserdecreasesuntilallfansarestopped.TurbineisshutdownandbypassAtshutdown,vacuumbreaker(ifany)shallbeopenedbysignalfromturbinecontrolsystem.在關(guān)閉時(shí)，真空破壞閥（）要由來自汽機(jī)控制系統(tǒng)的信號打開All/Condensateisolatingvalvesshallbeinopenposition(?Step00所有蒸汽/冷凝水閥門要設(shè)在開的位置(→工序00)Ifaprolongedshutdownisforeseenwherefreezingispossible,thepartsofthecondensatesystemthatcanfreezehavetobedrainedwhentheambienttemperatureisalreadybelowzeroorwhensubzerotemperaturesareexpected.Weinsistparticularlyonthedrainingofthevacuumsystem,thepumpsandthecleaningsystem.WatersealsareshutoffwhenvacuumisreducedtoPlantinstandbyDuringstandby,thecondensershallbeheldundervacuumatapprox.6to8kPabytemporarilyusingavacuumpump,dependingupontheavailabilityoftotheturbineglandsystem.OPERATIONMODEPRELIMINARY-運(yùn)行模式(初步AUTOMATICMODE自動(dòng)運(yùn)行模ThecontrolsystemregulatesTheexhaustpressurebyselectingtheappropriatecondensingstep(seechap.6)takingintoaccounttheambienttemperatureandfreezeprotectionactions.andthefollowingprotectionsareThepressureintheduct(protectionThetemperatureintheduct(protectionCoolingflowtothevacuumpumpsystem(vacuumpumps).(byVibration,oilpressureandoiltemperature,motorwiringtemperatureonfanassemblies(protectionaction).MANUALOPERATIONFROMCONTROLROOM來自控制室的Itispermittedtooperateoneequipmentmanuallyfromthecontrolroomwhentherestofthesystemisfullyautomatic.Anyspecificcondensingstepcanbeselectedmanually(steps00toXXsequentially)butmustbereleasedautomaticallywithinshorttimeforfreezing任意特殊的冷凝步驟都可手動(dòng)選擇（00(XX)），但當(dāng)系統(tǒng)在防凍保護(hù)LOCALMODE就地模式(byClient由業(yè)主操作Eachvacuumpumporfancanbeoperatedmanuallybyalocalswitch(ifadequateequipmentisforeseen).Itisallowedtooperateonepieceofequipmentlocallywhentherestofthesystemworksautomatically. EachEach每一個(gè)泵或風(fēng)機(jī)可被就地開關(guān)手動(dòng)操作（如果配有適當(dāng)?shù)脑O(shè)備）每一臺每一每一臺ACCCONTROLSYSTEM空冷控制系統(tǒng)TURBINEBACKPRESSURECONTROL汽機(jī)背壓Thecontrolsystemmodulatescontinuouslynumberoffansintooperation,fanspeedandisolatingvalvepositionbasedonthedifferencebetweenbothmeasuredandsettingbackpressure.Instrumentation儀Pleasereferto“Instrumentationlistperfunctionalgroup” _LIS6402latestrevision]. Philosophy原Thecontrolsystemselectsfanspeedcombinationsand/condensateisolatingvalvespositionsasafunctionofmeasuredturbinebackpressure01MAG90CP101/102/103andbackpressuresetpoint.CP101/102/103和背壓設(shè)定值的函數(shù)值。Fanspeedcombinationand /condensateisolatingvalvespositionaredescribedin DES6403“Fancontrolsteps”andDES6404“Valvecontrolsteps”(later)appendedinannex2.DES6403indicateswhichfansarerunningatmodulatedspeedandwhichonesarestopped(moduleinnaturalconvection).DES6404indicateswhichvalvesareopenorclosedandthereforewhichstreetsareintooperation. 指明哪臺風(fēng)機(jī)按調(diào)節(jié)的速度運(yùn)行，哪臺停止（在自然對流單元里） 指明哪個(gè)閥開或關(guān)，以及哪列運(yùn)Thereare(XX)(fromstep00tostep(XX))condensingcapacitysteps.Eachstepisacombinationoffanstatusand/condensateisolatingvalvespositions. umcondensingcapacitystepoftheunitcorrespondstothelaststep(Step(later)).ThistablehastoberespectedinalldetailsforagoodACCInthefanstart-upsequence,closeattentionhastobegiventoalwayscondenseinsideACCinthemosthomogeneousway(i.e.runningfanshavetobebalanced,asfaraspossible,betweenallthestreets).Innon-freezingcondition,thefanstartingsequenceistheFirstfanstobestartedineachstreetarealwaysthefanunderneaththesecondaryBundles(Mixedmodules)(atshutdown,thosefanswillbethelastfanstopped).Then,whensecondarymoduleineverystreetarestarted,primarymodulesmaybestartedandbalancedstreetbystreet.When2ormorefansarereleasedtostart,slighttimedelay(15secondsadjustable)shallbeappliedbetweenindividual在非結(jié)凍的條件下，風(fēng)機(jī)啟動(dòng)序啟動(dòng)，并一列一列地平衡啟動(dòng)。當(dāng)2個(gè)或風(fēng)機(jī)被解除連鎖去啟動(dòng)時(shí)，每臺風(fēng)機(jī)之間應(yīng)有15秒鐘（可調(diào)整的）的啟動(dòng)間隔。Infreezingcondition,thefanstartingsequenceistheSamestartingsequenceforthenon-isolablestreetsthantheabovedescribedThen,firstisolablestreetisopened(andcondensateisolatingvalvesopen,seeopeningsequenceherebelow)andallfanswithinthisopenedstreetstartingfromsecondaryfan.在結(jié)凍條件下，風(fēng)機(jī)啟動(dòng)序列如FanmotorsarefedthroughVariableFrequencyDrivers.Allrunningfanswillrunatsamespeed.MeasuredturbinebackpressureshallbecomparedinDCStosetpointandpressurecontrollershalladjustcontinuouslyspeedofallrunningfansbymeansofthevariablefrequencydrives.Afanspeedincreasewillproduceabackpressurereductionandvice-versa.DCS上與設(shè)定點(diǎn)比Aminimumfanspeedisrequestedtoensureacorrectoilflowinsidethegearbox.Atstart-upfanstartsataminimumvelocitycorrespondingtoelectricalsupplyat15Hz(setpointsetinVFD).Whentheheatloadisreducedandallfansarealreadyatminimumspeed(correspondingto15Hz),theymaybestoppedoneaftertheother(sequenceofshutdownreversetostart-upsequence,seeDES6403–FanControlStep–Step1tostep(later)).DES6403-風(fēng)機(jī)控制步驟：步1-步(later)）Whensomefansinastreetarenotrunning,thecontrolsystemmodulatestheotherrunningfansspeedbymodulatingelectricalsupplyfrom15Hzto40Hz(preliminary)forPrimaryModulesandfrom15Hzto40Hz(preliminary)forMixedModules(SeeDES6403–FanControlStep).Whenallfansinast