摘要
针对某电厂锅炉水冷壁管的严重腐蚀问题,通过宏观形貌检查、化学成分分析、微观组织分析及能谱分析等方法进行了系统分析。结果表明:该锅炉燃用高硫煤时,炉膛火焰中心偏斜导致水冷壁局部出现还原性气氛,产生硫化物型高温腐蚀。最后针对具体原因,提出了控制燃煤质量、调整燃烧、增加贴壁风等改进措施,有效地解决了该锅炉水冷壁高温腐蚀问题。
The serious corrosion problem of a boiler water wall tube was systematically analyzed through macroscopic morphology, chemical com- position, microstructure and energy spectrum. Results showed that the deflection of flame center in boiler furnace caused the formation of local reductive atmosphere among water-wall when burning high-sulfur coal was used, thus the sulfide-type high-temperature corrosion was emerged. At last, the corresponding measures such as controlling the quality of coal, adjusting the combustion and increasing the wall wind were put forward and the high- temperature corrosion of boiler water-wall was effectively solved.
出处
《材料保护》
CSCD
北大核心
2017年第12期87-90,共4页
Materials Protection
关键词
高温腐蚀
锅炉
水冷壁
高硫煤
还原性气氛
high- temperature corrosion
boiler
water wall
high- sulfur coal
reductive atmosphere
