华电技术 ›› 2018, Vol. 40 ›› Issue (11): 12-16.

• 研究与开发 • 上一篇    下一篇

电站锅炉受热面管内壁腐蚀缺陷检测技术研究

  

  1. 中国大唐集团科学技术研究院有限公司华中分公司,郑州〓450000
  • 出版日期:2018-11-25

Research on the detection technology of corrosion defects on the heating surface tube inner walls of the power station boiler

  1. Datang CentralChina Electric Power Test Research Institute, Zhengzhou 450000, China
  • Published:2018-11-25

摘要:

针对当前电站锅炉在役受热面管内壁腐蚀缺陷检测方法存在的局限性,设计了一种适用于在役锅炉受热面管检测的专用阵列式低频涡流探头。结合锅炉受热面管监督检验要求,分别制作了轴向和周向人工缺陷对比试验样管,研究阵列低频涡流检测的灵敏度。现场应用表明,采用阵列式低频涡流检测技术,提高了锅炉受热面管内壁腐蚀缺陷检测效率,且不易造成缺陷漏检。

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Abstract:

Considering the limitation of the corrosion defects detection method for the heating surface tube inner walls of the current boilers in power plants, a special array lowfrequency eddy current probe is designed. Combined with the requirements on the supervision and inspection of the heating tubes of boilers, contrast test tube samples with axial and circumferential artificial defects are made respectively to study the sensitivity of array low frequency eddy current test. Field application shows that the array lowfrequency eddy current test can improve the detection efficiency of corrosion defects on the inner wall of the boiler heating surface tube, with less missing defects.

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