Experimental Study on High Temperature Corrosion of Boiler Water Wall and Transverse Crack Leakage of Wall Tube
Considering that high-temperature corrosion of boiler water-cooled wall surfaces can cause cracks in the wall tubes and lead to leak-age accidents,in order to obtain the factors affecting high-temperature corrosion of boiler water-cooled wall surfaces,a test study on high-tem-perature corrosion of boiler water-cooled wall surfaces and transverse crack leakage of wall tubes is proposed.Failure analysis was conducted on transverse cracks in the high-temperature corrosion zone of boiler water-cooled walls.Through macroscopic observation,material analysis,and non-destructive testing,the causes of transverse cracks in boiler water-cooled wall pipes were studied and analyzed.Based on the principle of high-temperature corrosion experiments on boiler water-cooled wall surfaces,the gas conditions were determined.Through the preparation of sample blocks,a high-temperature corrosion experimental plan for boiler water-cooled wall surfaces was designed.The influence of atmosphere conditions and temperature on high-temperature corrosion of boiler water-cooled wall surfaces was tested.The results show that the more H2S content and temperature in boiler flue gas,the more severe the wall corrosion of boiler water-cooled walls under the combined effect of thermal fatigue stress and high temperature caused by wall temperature fluctuations,resulting in transverse cracks in the wall tubes and leakage.
high temperature corrosiontransverse crackboiler water wallleak testcorrosion ratewall thickness
万方数据
维普
