分子筛特殊再生方案.doc

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1、YulinTSAINITIALCONDITIONINGPROCEDUREPurposeTheTSA’scontainalayerofCaXmaterialtoremoveCO2andN2O.Watertypicallydoesnotcontactthislayer.Butundersomeplantupsetsmaintenance,or duringloadingofsieve;watermayreachthismaterial.AstheresidualwatercontentontheCaXincreases,itsca

2、pacityforCO2andN2Odecreases,whichcanleadtoprematurebreakthrough(i.e.shorteron-streamtimes).NormalregenerationtemperaturesarenothighenoughtocompletelyremovewaterfromtheCaXmaterial,sohightemperatureregenerationisrequired.Thisproceduredescribesthestepsfortheinitialrege

3、nerationoftheTSA.ScopeThisprocedureassumestheASUhasbeenisolatedandsecured,suchthatitissafetooperatethemainaircompressor,DCAC,andtheTSA.Warnings/NotesThehightemperatureregenerationcausesafewsituationsthatmustbemonitoredclosely.·       TheTSAregenerationcircuitisn’tde

4、signedforhightemperatureandpressure. Theregenerationcircuitpressuremustoperate<0.5barg·       Thetemperaturetothemainexchanger<65C.·       EnsuretheareaaroundtheTSAandRegenerationHeatersisclear.·       Theminimumregenerationflowrateis13,700Nm3/hr. Iftheregenerationf

5、lowistoolowitwon’tbeeffectiveinremovingthewaterorsteamingofthesievecouldoccur.·       BreakthroughofCO2(>50ppmCO2)ontoahotbedcouldcausesomedamagetothesieve.·       Inordertoachievethedesiredeffect,thetotalheattimeforeachadsorbervesselmustbe>12hourswithregenerationfl

6、owconditionsof14500Nm3/hrat300Cregeninlettemp.Assumeheateroutlettempis330Ctoaccountforpipingheatleak.·       Theon-linetimefortheadsorberisabout30hoursat33Cairinlettemperatureand15000Nm3/hrofairflow.4·       TSAonlinetimeforadsorbercanbeincreasedifairtemperatureislo

7、wer.At15000nm3/hbootstrapflow,28Cand5barginletconditions,theonstreamtimeisapprox38hours.      ·       Thesteamandelectricheatersmustberuntoachievethe330Cregenerationtemperature.·       Duringregen,airflowtotheonstreamadsorbershouldbelimitedtotheadsorberregenerationf

8、lowof14500Nm3/hrtominimizeonstreamadsorberwaterloadandmaximizeonstreamtime. 4Procedure1.StarttheMAC,Frontendsystem.主压缩机，空冷塔和TSA正常运转。2.Over