1991年12月30日,延安氮肥厂一台SHL6.5-25-Ⅰ型生产2号锅炉发生严重缺水爆管事故。全厂被迫停产,造成重大经济损失。从炉膛内部检查发现,炉膛四周水冷壁管、顶棚管、对流管束共有85根严重脱碳(呈黑兰色)和不同程度的变形。这次事故的直接原因,一是厂方对锅炉管理没有拿到日程上来,锅炉房脏、乱、差俱全。司炉工有章不循,观察水位表不冲洗,未装高、低水位报警及联锁保护装置。锅炉运行中对水位监视不够。二是大部分水冷 December 30, 1991, Yan’an nitrogenous fertilizer plant a SHL6.5-25-Ⅰ type 2 boiler serious water burst tube accident. The whole plant was forced to stop production, resulting in major economic losses. From the furnace internal inspection found that the furnace around the water wall tube, roof tube, convection tube bundle a total of 85 serious decarburization (dark blue) and varying degrees of deformation. The direct cause of the accident, one factory did not get the schedule to the boiler management, boiler room dirty, chaotic, poor quality. Stoveman does not follow the rules, observe the water table does not wash, not installed high and low water level alarm and interlock protection device. Boiler monitoring of water level is not enough. Second, most of the water-cooled