火力发电厂600 MW机组水汽系统氢电导率超标原因分析及处理

火力发电厂600 MW机组水汽系统氢电导率超标原因分析及处理1. IntroductionIn modern power plants, the operation of water-steam cy

600MW 火力发电厂机组水汽系统氢电导率超标原 因分析及处理 1.Introduction Inmodernpowerplants,theoperationofwater-steamcycle iscriticalforensuringthesafetyandefficiencyofthepower generationprocess.Thehydrogenionconcentration,orpHvalue, ofthewaterinthecycleisacriticalparameterthataffectsthe corrosion,scaling,andoverallreliabilityoftheequipment.Inthis paper,wewillanalyzethereasonfortheexcessivehydrogenion concentrationinthewater-steamcycleofa600MWpowerplant unit,andproposeasolutiontoimprovethewaterqualityand mitigatetheassociatedrisks. 2.AnalysisoftheProblem Theexcessivehydrogenionconcentrationinthewaterofthe powerplantunitisduetoseveralfactorsthathavecontributedto theaccumulationofionsanddissolvedsolidsinthecycle.The sourcesofcontaminationincludetherawwatersource,the chemicaltreatmentprocess,andtheoperationoftheequipment. 2.1RawWaterQuality Therawwatersourceforthepowerplantunitcontainshigh levelsofdissolvedminerals,suchascalcium,magnesium,and sulfate,whicharecommoninthelocalgeology.Thehighmineral contentcausesscalingandfoulingintheequipment,whichinturn increasesthehydrogenionconcentrationinthewater.Moreover, therawwateralsocontainsorganicandinorganicimpuritiesthat contributetothecorrosionanddegradationofthematerialsin thecycle. 2.2ChemicalTreatment Tomitigatetheeffectsoftherawwaterqualityonthe water-steamcycle,thepowerplantunitemploysaseriesof chemicaltreatmentprocesses,includingdosingofoxygen scavengers,scaleinhibitors,andantifoamagents.However,the chemicaltreatmenthasalsocontributedtotheexcessive hydrogenionconcentration,asthedosingofchemicalscanalter thechemicalcompositionofthewaterandintroducenew