火电厂锅炉高温硫腐蚀机理及解决方法

张丹平(华能珞璜电厂,重庆402283):,360MW,,:;;;;:TK224.94:A:1671086X(2007)03020003HighTemperatureCorrosioninPowerPlantBoilersandCountermeasuresZHANGDanping(HuanengLuohuangPowerPlant,Chongqing402283,China)Abstract:Hightemperaturecorrosion,aproblemgenerallymetwithinboilersfiringcoalwithhighsulfurcontent,maycauseleakagesinheatdeliverysurfaces.WithaneyeonHuanengLuohuangPowerPlants360MWsets,countermeasuresagainsthightemperaturecorrosionarebeingexplained,amongwhichmetalspraycoatingshaveprovedthemselvestobequiteeffectiveKeywords:energyandpowerengineering;boiler;hightemperaturecorrosion;protectivemeasures;metalspraycoating:20061115:(1979-),,,,100MW,!40%,70%!!,,,[1],,,1,,:,1.1,,:(1);(2);(3),∀200∀(2007No.3)火电厂锅炉高温硫腐蚀机理及解决方法,;(4),,,,1.2,[2]:(1),,;(2),,;(3),,1.3,111:(Fe2O3),2:SO33:,,,,SO3,4:SO3SO35:,Na3Fe(SO4)3,,SO3,680#C,4600#C,,,22.1,4.06%(1)1991919923,1994,1995,ALSTOM,MATELSPARY,1~219978,:,3419982600MWW!,ALSTOM,FW,W!,1600#CFW300MWW!,2%19998,200243,,10mm6.3mm,,1.5mm/1.5~2mm/,,2.2(1),SO3,:1.151.01,[3]∀201∀火电厂锅炉高温硫腐蚀机理及解决方法(2007No.3)1War%Wad%Aar%Var%Vdaf%FCar%Qnet.arMJ∀kg-1HGICar%Har%Oar%Nar%Sar%6.211.4629.418.7113.5355.6721.397254.922.262.180.964.06∃3.111.2225.357.5210.5164.0223.418563.582.770.880.843.47%8.711.6635.019.0216.0347.2618.666846.622.041.411.085.13(2),,,H2S(3),,(4),,,(5),,(6),,,(7)2:&!,0.10~0.14mm,,,20000h;;,,∋:(3~5),(50%~100%),(40~50MPa),,:(1)UTEx306(45CT),NiCrTi,;(2)UTEx335,FeCrC,33%,,!UTEx306(Cr45%,Ti4%,Ni),UTEx3067~1013mUTEx30660,40%,,UTEx306,,;,UTEx306,,,,319971~4,8::[1],,.[J].,2001,21(4):7681.[2].[J].,1997,18(6):36.[3],,,.[M].:,1997.∀202∀(2007No.3)火电厂锅炉高温硫腐蚀机理及解决方法