超临界锅炉管内氧化皮剥落的安全控制研究

doi:10.16265/j.cnki.issn1003-3033.2017.08.011

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (8): 62-67.doi: 10.16265/j.cnki.issn1003-3033.2017.08.011

超临界锅炉管内氧化皮剥落的安全控制研究

陈志刚¹ 高级工程师, 袁丹珏², 黎华¹ 高级工程师, 叶伟文¹ 高级工程师, 张振顶¹ 高级工程师, 刘定平² 副教授

1 广州特种承压设备检测研究院,广东广州 510663;
2 华南理工大学电力学院,广东广州 510640

收稿日期:2017-05-06 修回日期:2017-07-06 出版日期:2017-08-20 发布日期:2020-10-13
作者简介:陈志刚(1964—),男,广东江门人,高级工程师,主要从事特种承压设备安全节能研究工作。E-mail:chen00043@21.cn.com。
基金资助:
国家质量监督检验检疫总局科技计划项目(2015QK169)。

Safety control research on scaling of oxide skin from tubes in supercritical boiler

CHEN Zhigang¹, YUAN Danjue², LI Hua¹, YE Weiwen¹, ZHANG Zhending¹, LIU Dingping²

1 Guangzhou Special Pressure Equipment Inspection and Research Institute, Guangzhou Guangdong 510663,China;
2 School of Electric Power, South China University of Technology, Guangzhou Guangdong 510640,China

Received:2017-05-06 Revised:2017-07-06 Online:2017-08-20 Published:2020-10-13

摘要/Abstract

摘要： 为防止超临界锅炉管内氧化皮剥落而频繁出现的超温爆管事故,提出基于安全温度变化率的超临界锅炉运行控制技术。研究超临界锅炉管内氧化皮厚度与运行时间的关系,导出氧化皮剥落的临界温度变化率与运行时间的关系式。以某600 MW超临界锅炉为例,结合工程安全裕度,绘制不同运行时间、材料、温度下防止超临界锅炉管内氧化皮剥落的安全温度变化率控制曲线。研究结果表明:超临界锅炉的运行温度越高、运行时间越长,安全温度变化率就越小; 应针对不同管材,采用基于最小安全温度变化率的均匀启炉、加速停炉、停炉吹管安全运行控制技术。

关键词: 超临界锅炉, 氧化皮剥落, 爆管, 安全温度变化率, 安全运行控制技术

Abstract: For the sake of preventing the accidents of bursted tubes caused by both supercritical boiler oxide skin spalling and over-temperature, the paper was aimed at developing an operation control technology for supercritical boiler based on safe temperature change rate. A relationship was deduced between oxide skin exfoliation's critical temperature change rate and boiler's run time after studying the relationship between oxide skin thickness in tubes of supercritical boiler and run time. A certain 600 MW supercritical boiler in China was taken as an example, for which control lines of the safe temperature change rate preventing the oxide skin in supercritical boiler's tubes from exfoliating at different run time, different materials and different temperatures were drawn on the basis of data on the engineering safety margin. The results show that there is a negative correlation between the safety temperature change rate of the supercritical boiler and both the operating temperature and run time, that the safe operation control technology saying "starting the boiler uniformty", "shutting down the boiler acceleratively" and "shutting down the boiler and cleaning tubes", which is based on the smallest safe temperature change rate, should be adopted for different pipes.

Key words: supercritical boiler, oxide skin spalling, burst tube, safe temperature change rate, safe operation control technology

中图分类号:

X944.2

陈志刚, 袁丹珏, 黎华, 叶伟文, 张振顶, 刘定平. 超临界锅炉管内氧化皮剥落的安全控制研究[J]. 中国安全科学学报, 2017, 27(8): 62-67.

CHEN Zhigang, YUAN Danjue, LI Hua, YE Weiwen, ZHANG Zhending, LIU Dingping. Safety control research on scaling of oxide skin from tubes in supercritical boiler[J]. China Safety Science Journal, 2017, 27(8): 62-67.

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超临界锅炉管内氧化皮剥落的安全控制研究

Safety control research on scaling of oxide skin from tubes in supercritical boiler

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