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近年来,我们在锅炉停炉定期检验中发现,有些锅炉使用单位,在锅炉停炉保养时,由于方式、方法不当,致使锅炉本体严重腐蚀渗漏,造成不必要的经济损失。案例1:我市某公路总段一台SZL2.8-0.7/95/70-AⅡ型锅炉,在检验中发现,前、后拱耐火保温层(浇注而成)质地疏松,有很多细小裂纹,拱面呈鸡蛋大小脱落;凹凸不平,个别拱管暴露出来,水压试验渗漏。将前、后拱打掉,发现拱内拱管外壁已严重腐蚀,壁厚减薄,强度下降,最大剩余壁厚小于
In recent years, we found in the regular inspection of boiler shutdown that some boilers use units. When the boiler is shut down for maintenance, due to improper methods and methods, the boiler body is seriously corroded and leaked, resulting in unnecessary economic losses. Case 1: A section of SZL2.8-0.7 / 95/70-A Ⅱ boilers in a section of the city’s highway was found in the inspection that the front and rear arch fireproof insulation layer (pouring) made of loose texture with many small cracks, The size of the egg surface falls off; uneven, individual arch tube exposed, hydraulic test leaks. The front and rear arch knocked out and found that the outer wall of the arch has been severely corroded, wall thickness, strength decreased, the maximum remaining wall thickness less than