2025/6/21113.3Steam-waterseparationandsteampurification
第三节汽水分离及蒸汽清洗装置1.Steam-waterseparation汽水分离Subcriticalpressurerecirculatingboilersandsteamgenerators亚临界锅炉areequippedwithlargecylindricalvesselscalledsteamdrums.配备锅筒Theirprimaryobjectiveistopermitseparationofthesaturatedsteamfromthesteam-watermixtureleavingtheboilingheattransfersurfaces.实施汽水分离Thesteam-freewaterisrecirculatedwiththefeedwatertotheheatabsorbingsurfacesforfurthersteamgeneration.再汽化水冷壁等
2025/6/21213.3Steam-waterseparationandsteampurification
第三节汽水分离及蒸汽清洗装置1)Functionofsteamdrum锅筒的作用Thesaturatedsteamisdischargedthroughanumberofoutletnozzlesfordirectuseorfurtherheating.Thesteamdrumalsoservesto:mixthefeedwaterwiththesaturatedwaterremainingaftersteamseparation,给水混合mixthecorrosioncontrolandwatertreatmentchemicals(ifused),药剂混合purifythesteamtoremovecontaminantsandresidualmoisture,蒸汽清洗removepartofthewater(blowdown)tocontroltheboilerwaterchemistry(solidscontent),排污providelimitedwaterstoragetoaccommodaterapidchangesinboilerload.储水量以适应负荷快速变化
2025/6/21313.3Steam-waterseparationandsteampurification
第三节汽水分离及蒸汽清洗装置Theprimaryfunctionofthesteamdrum主要功能istopermittheeffectiveseparationofsteamandwater.Thismaybeaccomplishedbyprovidingalargesteam-watersurfacefornaturalgravity-drivenseparationorbyhavingsufficientspaceformechanicalseparationequipment.Highefficiencyseparationiscriticalinmostboilerapplicationsinorderto:preventwaterdropletcarryoverintothesuper-heaterwherethermaldamagemayoccur,防止水滴进入过热器minimizesteamcarryunderinthewaterleavingthedrumwhereresidualsteamcanreducetheeffectivehydraulicpumpinghead,减少蒸汽进入下降管preventcarryoverofsolidsdissolvedinthesteam-entrainedwaterdropletsintothesuperheaterandturbinewheredamagingdepositsmayform.防止溶解固体进入过热器
2025/6/21413.3Steam-w