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某化工企业1台型号为YG130-5.3-M35型循环流化床锅炉,于2004年5月开始投入使用,运行情况一直良好,至发生泄漏事故止,累计运行时间近35000h左右。2009年,该锅炉水冷壁管多次发生爆管泄漏事故。经检查发现,水冷壁管内壁均有不同程度的腐蚀现象。爆管后对附近管段进行割管检查,未发现有相同的腐蚀坑,但锅炉投运一段时间后,又会在其他地方爆开。为了确保锅炉长期安全运行,作者对该锅炉进行了全面检测,进一步查明腐蚀的分布情况和腐蚀种类,以及其产生的原因,并提出相应的处理措施。
A chemical company model YG130-5.3-M35 circulating fluidized bed boiler, in May 2004 began to put into use, the operation has been good, to the occurrence of a spill, the cumulative run time of nearly 35000h or so. In 2009, the boiler water wall tube burst pipe leak occurred several times. The inspection found that the wall of water wall tubes have different degrees of corrosion. After the squib pipe cutting pipe near the inspection, did not find the same corrosion pits, but the boiler put into operation for some time, it will burst in other places. In order to ensure long-term boiler safe operation, the author conducted a comprehensive inspection of the boiler to further identify the distribution of corrosion and corrosion types, as well as the reasons for its occurrence, and propose appropriate treatment measures.