Analysis and Prevention Measures of High Temperature Corrosion of Water Wall of a 700 MW Boiler
Aiming at the serious problem of water wall corrosion of a 700 MW opposed-firing boiler in a power plant,the cause of high temperature corrosion of the boiler was analyzed.The corroded water-cooled wall tube was cut at the site,and the corroded scale layer was analyzed by X-ray diffraction(XRD),X-ray energy dispersive specturn(EDS)and scanning electron microscope(SEM).The results showed that the corrosion products contained ZnS,FeS,Fe7S8,Fe3O4 and α-FeOOH.It was concluded that the furnace was mainly sulphide type high temperature corrosion,and the prevention and control measures were formulated for the boiler.
boilerwater walllow nitrogen combustionhigh temperature corrosion
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维普
