简介:Sincethefirstbatchof350-MWsupercriticalutilityboilerswasputintooperation,theexhaustfluegastemperatureoftheboilershasalwaysbeenhigherthanthedesignedvalue.Themainreasonisthattheheatabsorbedbytheairheaterisnotsufficient.InHuanengDongfangPowerPlant,theexhaustfluegastemperatureisloweredthroughmodificationstotheeconomizerandtheairheater.Theexperimentalresultsrevealthateveryyear,eachboilercouldsave3850tonsofstandardcoalandreduce85tonsofSO2and9000tonsofCO2respectivelyafterretrofit.