|本期目录/Table of Contents|

[1]岳〓忠,张月山.电站锅炉管件失效泄漏原因分析[J].中国安全生产科学技术,2012,8(9):150.
　YUE Zhong,ZHANG Yue shan.Cause analysis of leakage by tube failure of power station boiler[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2012,8(9):150.
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电站锅炉管件失效泄漏原因分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
8
期数:
2012年9期
页码:
150
栏目:
出版日期:
2012-09-30

文章信息/Info

Title:
Cause analysis of leakage by tube failure of power station boiler
作者:
岳〓忠1; 张月山2
（1.首都经济贸易大学 安全与环境工程学院, 北京 100070) (2.山东菏泽发电厂锅炉队, 菏泽 274032）
Author(s):
YUE Zhong1;  ZHANG Yueshan2
(1.School of Safety and Environment, Capital University of Economics and Business, Beijing 100070,China) (2. Boiler Team of boiler ,Shan Dong Heze Power Station ,Heze 274032,China)
关键词:
电站锅炉; 泄漏; 失效; 爆管
Keywords:
power station boiler; leakage; failure; tube burst
分类号:
X933.2
DOI:
-
文献标志码:
A
摘要:
火力发电厂管件失效泄漏是频发事故，严重影响机组的安全、经济运行。以某发电厂后墙省煤器和低温再热器管子失效泄漏事故为例，通过对失效泄漏的管件进行宏观形貌分析、金相分析和强度分析，论证了泄漏事故的原因是由于腐蚀和钢管固有缺陷导致低温再热器高温段弯管外侧发生泄漏，泄漏的高速流体冲刷、气蚀导致后隔墙省煤器发生泄漏，进而对低温再热器反冲刷，加剧泄漏事故的恶化。最后提出更换失效管件，加强金属监督，尽量扩大防磨防爆检查范围，对易被气流磨损、冲刷部位进行防磨喷涂或加装防磨罩。
Abstract:
Tube burst accident of heating surface tubes in a thermal power plant takes place frequently, which seriously affects the safety and economic operation of thermal power plant. In this paper the tube failure leakage accidents of economizer and low temperature reheater in a power plant were analyzed. Three kinds of methods were applied, including macroscopic analysis, metallographic analysis and strength analysis. It showed that overheating was not the cause of this tube burst. Oxygen corrosion and defects of low reheater leaded tube leakage. Then leaking fluid from low temperature reheater tube caused fluid scour and cavitations erosion on the rear wall economizer. Fluid scour and cavitations erosion leaded leakage of the rear wall economizer. The fluid from the rear wall economizer tube caused fluid scour and cavitations erosion on the low reheater which strengthened leakage of low reheater. At last the treatment measure and proposals of preventing similar accident were put forward. The failure tube should be replaced. The examination and test of metal tube should be paid attention to during boiler maintenance. Metal tube which is easy to be scoured should be put on protection covering or coating to prevent from fluid scouring.

参考文献/References:

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备注/Memo

备注/Memo:
首都经济贸易大学2011年中青年教师科研提升资助项目
更新日期/Last Update: 2012-10-16