锅炉炉底水冷壁管爆管分析

,(,830000):,,:;;;:TK223.3+1:B:100124012(2001)0820354203FAILUREANALYSISOFBOILERFURANCEWATER2WALLTUBEHECheng,XIAOWen2bin(XinjiangElectricalPowerResearchInstitute,Wulumuqi830000,China)Abstract:Apowerplantsboilerfurnacewater2walltubeburstedseveraltimes.Bymicrostructureexamination,mechanicalpropertytest,EDSanalysisandcombinedwithsurveyofboileroperationcondition,itwasfoundthatthepoorworkingconditionresultedinalkalinecorrosionunderthescaleofthetubewall.Thiscausedthereducingofthetubethicknessandleadedtofinalbursting.Keywords:Boiler;Water2walltube;Explosion;Alkalinecorrosion11996,60mm5mm,20G,54,105mm,35mm,,(1),51,,()40%,,22.15152,11,:200021220511/MPa(%)51486664476244167439705244065501704456446767453378200182PTCA(PARTA:PHYSICALTESTING)Vol.37No.8Aug.2001,2.2(1)+,,,224004%(2)+,,20,334004%(3),,,,4(4)+,,202.3(),,241004%2w(%)FeCuSiAlZn55.4941.50.950.921.1533.1,15003.2,CuZn,,60%Cu,,,pH8.59.4pH9.4,,pH,pH,,Cu,(),,,,CuZn,pH,,553:,Fe3O4+4OH-FeO-22+2FeO-12+2H2OFeO+2OH-FeO-22+H2OFe+2OH-FeO-22+H2Fe3C+6OH-3FeO-22+CH4+H2,(2)4,,:[1].[M].:,1992.[2].[M].:,1962.[3].[M].:,1985.18.,,,,19.,,,,,20.()21.,,,,,,,,,,,,,,,,22.,,,,23.,,()653: