火电厂1025Th锅炉高温过热器爆管分析.pdf
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Vol-20
第20卷第3期 腐蚀科学与防护技术 No.3
2008年5月 Mav.2008
SCIENCEANDPROTECTIoNTECHNOLOGY
CORROSION
火电厂1025T/h锅炉 器爆管分析
鲁玉龙1,薛守洪2,徐蓓2,卫志刚2,张利文1
1.蒙达发电有限责任公司,达拉特旗014300;2.内蒙古电力科学研究院,呼和浩特010020
摘要:对某电厂爆管及高过管内壁脱落的氧化皮进行了分析.结果表明:蒸汽系统内可能存在一定量的自由态氧,
具备发生氧腐蚀条件,且高过管排内所生成的氧化皮呈多孔疏松状,其易脱落堵塞管体导致短时过热爆管.
关键词:高温过热器;爆管;氧化皮
223.3
中图分类号:TK 文献标识码:A 文章编号:1002-6495(2008)03-0193-04
EXPERB垤ENTALSTUDIESoNBURSTINGPROBLEMOFHIGH
TEMPERATURESUPEIUlEATEROFA1025T/HBOILER
LU Pei2,WEI Li-wenl
Yu—lon91,XUEShou—hon92,XUZhi—gan92,ZHANG
PowerLimited
1.Mongda LiabilityCompany,Dalate014300;
2.Inner ElectricPowerScienceandResearch 010020
Mongolia Institute,Huhehaote
an treatmentwas forthefeed tube and
Abstract:After water,theleakagebursting
oxygenated applied
ofchemical
of ofa1025t/hboileroccurred.The
problemshightemperaturesuperheater analysis compo-
with electron
sition,mechnicaltest,examinationsmetallography,scanningmicroscopy(SEM)
performance
and conductedwiththefailuretubes.Theresultsshowthatthefree
X—raydiffraction(XRD)were oxygen
beexistedin corrosioncouldocCULT.Theoxidescalesontubessur-
might vaporsystem,therefore,oxygen
facein exhibited andloose oxidescale
highte
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