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1990年7月,对一台发生事故的 QXL2·8—0·7/95/70—A_I 型管架式热水锅炉进行了全面的检验。该锅炉系1988年8月制造,10月安装,截止检验期共运行了4个月23天。经检验发现锅炉炉膛左侧集箱前端向火面不到800mm 长的管段上产生三个鼓包,其大小分别为:φ100×17;φ80×18;φ100×22,在10倍放大镜下可观察到在最大鼓包顶端已产生细小裂纹,锤子一敲即穿,从穿孔处可检查出集箱中积渣已超过1/2。集箱规格为φ219×10。根据检验情况,纵观锅炉总体结构,分析引起集箱鼓包的主要原因有以下几点:
In July 1990, a full inspection of a QXL2.8-0.7 / 95/70-A_I tube-shelf hot water boiler was carried out. The boiler was manufactured in August 1988 and installed in October. The boiler was operated for a total period of 4 months and 23 days. The test found that the front of the boiler to the left of the header to the fire surface is less than 800mm length of the pipe segment to produce three drums, respectively, the size of: φ100 × 17; φ80 × 18; φ100 × 22, 10 times the magnifying glass can be observed At the top of the largest bulge has been a small crack, hammer knock that is worn, from the piercing Department can check out the header in the slag has more than 1 / Set size specifications for φ219 × 10. According to the inspection, looking at the general structure of the boiler, the main reasons for the analysis of the drum kits are as follows: