某电厂分隔屏爆管失效分析测试

Failure Analysis and Test of Tube Bursting of Boiler Division Panel in a Power Plant

针对某电厂SG-1025/18.6-M725型锅炉长期停机重启后出现的分隔屏过热器受热面爆管问题进行分析测试。对爆管部位热面管取样进行宏观检查、尺寸测量、化学成分分析、硬度检测、拉伸试验、金相分析、微观断口形貌分析,综合测试分析得出分隔屏过热器受热面管爆管原因并给出合理化建议,可为火力发电厂避免再次发生同类事故提供事前预防参考。

In this paper,the tube bursting problem on the heating surface of the partition screen superheater after a long-term shutdown and restart of the SG-1025/18.6-M725 boiler model in a certain power plant is analyzed and tested.By means of macroscopic inspection,size measurement,chemical composition analysis,hardness testing,tensile testing,metallographic analysis,and micro fracture morphology analysis on the hot surface tube samples at the tube explosion position,causes of the tube explosion on the heating surface of the partition screen superheater are obtained after comprehensive test and analysis;and then reasonable suggestions are given to provide a reference for preventing the similar accidents in fossil fuel power station.