B&BW-65／3．82-M型煤粉锅炉水冷壁管鼓包原因分析及处理

Reason Analysis and Treatment of water cooling wall hunch of the coal powder boiler

某单位一台B＆BW-65／3．82-M型煤粉锅炉,在连续五年的检修检查过程中发现炉膛西侧水冷壁管鼓包,爆裂。通过宏观、微观金相检验和X射线物相分析等检测方法对其进行了分析。结果表明,鼓包系煤粉锅炉燃烧切圆向西偏移,水质管理不当而产生严重水垢,使水冷壁管局部长期超温,显微组织珠先球体化,引起管子蠕变胀粗而最终导致鼓包和爆管。

Powder boiler of a unit of a set of coal , Find burner hearth the west cool with water wall in charge of the hunch in overhauling and checking for five years in succession, burst. Examine through macroscopic , micro metallography person who analyze detection method analyze to their with X ray thing. Result indicate hunch department coal powder boiler burn circle contact skew westwards , water quality management improper to the serious scale produces , make , cool with water wall in charge of some and for a long time extremely warm , organize pearly - lustre spheroid while being micro - , cause tube to be creep bloated and thick leading to the fact hunch and booster finally.