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1 基本情况及问题 1997年11月,广东省番禺市某造纸厂对1台50t/h锅炉的全部水冷壁管(包括前、后、左、右四部分)进行更换维修。该锅炉的型号为CG—50/3.83ML。1998年2月初,在锅炉投入运行1个多月后,发现其左右水冷壁管存在严重的弯曲变形。变形主要集中在炉膛上部,大约距汽包底2～3m的位置。形状既有沿原水冷壁管位置左右弯曲的、也有沿炉膛中心方向突出弯曲的。中间位置的管子变形弧
1 Basic Information and Issues In November 1997, a paper mill in Panyu City, Guangdong Province, replaced and repaired all water wall tubes (including the front, rear, left and right sections) of a 50t / h boiler. The model of the boiler is CG-50 / 3.83ML. In early February 1998, more than a month after the boiler was put into operation, it was found that there were serious buckling deformations in the water-cooled wall tubes. Deformation is mainly concentrated in the upper furnace, about 2 ~ 3m away from the end of the drum position. Both the original shape along the original water wall tube bending position around the center, but also along the center of the furnace protruding prominent. The middle position of the tube deformation arc