某电厂锅炉后屏过热器管泄漏原因分析

华电技术 ›› 2014, Vol. 36 ›› Issue (11): 46-47.

某电厂锅炉后屏过热器管泄漏原因分析

(广东粤华发电有限责任公司，广州〓510731)

出版日期:2014-11-25 发布日期:2014-12-17

Analysis on leakage of rear plate superheater tubes of boiler in a power plant

(Guangdong Yuehua Power Company Limited, Guangzhou 510731, China)

Online:2014-11-25 Published:2014-12-17

摘要/Abstract

摘要： 摘要：通过对某电厂锅炉后屏过热器爆管管壁进行宏观检验、显微组织分析及内壁氧化皮测厚，并结合其生成机制判断锅炉后屏过热器爆管与长期超温及管壁减薄有关。根据后屏过热器检查状况,提出了保障其长期安全运行的措施。

关键词: 关键词：后屏过热器, 超温运行, 管壁减薄, 爆管泄漏, 安全运行

Abstract: Abstract:A tube crack accident of the boiler rear plate superheater in a power plant occurred. The macroscopic examination, the microstructure analysis and the thickness measurement of the oxide skin on internal wall were down for the cracked tube. Combining with the formation mechanism of the oxide skin, it was determined that the tube crack accident of the rear plate superheater is caused by overtemperature at long time and decreasing of the tube wall thickness. Based on the examination results of the rear plate superheater, the measures to ensure safe operation at long term were proposed.

Key words: Keywords:rear plate superheater, operate in overtemperature condition, decrease of thickness of tube wall, tube crackcaused leakage, safe operation

郝冬福，刘鸿. 某电厂锅炉后屏过热器管泄漏原因分析[J]. 华电技术, 2014, 36(11): 46-47.

HAO Dongfu, LIU Hong. Analysis on leakage of rear plate superheater tubes of boiler in a power plant[J]. Huadian Technology, 2014, 36(11): 46-47.

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