7-M415&M417, such as lower reheat steam temperature higher exit gas temperature then expectation, wear due to improper structure and tube rupture of backpass surfaces, etc.

• M417型锅炉普遍存在二次汽温偏低,排烟温度偏高,结构不合理造成尾部受热面磨损和爆管等问题,针对上述情况有关各方共同探讨制订改造方案,并予以实施。