220t/h锅炉高温过热器爆管原因分析

Analysis on reasons of pipe burst accident of 220 t/h boiler high-temperature superheater

某电厂220 t/h锅炉高温过热器发生爆管,对爆管及爆管周围管样进行宏观检查、拉伸性能试验、硬度检测和金相分析等,结合高温过热器实际运行工况,对比试验结果进行综合分析,查明爆管的主要原因是管子长期超温。针对该情况提出了后续的工作建议,确保锅炉安全、稳定运行。

The pipe burst accident of 220 t/h boiler high-temperature superheater of a power plant occurred.For the samples of the burst pipe and the pipes around it,the macroscopic inspection,the test of strength of extension,the hardness measurement and the metallographic analysis were carried out.Combining with practical operation of the high-temperature superheater,comparing with the test result,a comprehensive analysis was done,and it was found that the main reason of the pipe burst is long-term overtemperature of the pipes.Aiming at this situation,the suggestions on subsequent work were proposed to ensure the boiler to operate safely and stably.