某亚临界机组T23钢屏式过热器爆管原因分析

doi:10.11973/lhjy-wl201907017

PDF(28535 KB)

理化检验—物理分册 ›› 2019, Vol. 55 ›› Issue (7) : 506-511. DOI: 10.11973/lhjy-wl201907017

扫码查看或转发全文

质量控制与失效分析

某亚临界机组T23钢屏式过热器爆管原因分析

胥杨, 陈文觉, 马庆谦, 陈乐

作者信息 +

Cause Analysis on Tube Burst of T23 Steel Platen Superheater in a Subcritical Unit

XU Yang, CHEN Wenjue, MA Qingqian, CHEN Le

Author information +

文章历史 +

摘要

某亚临界机组在停炉检修过程中发现T23钢屏式过热器发生了爆管事故，通过宏观观察、金相检验、扫描电镜分析、力学性能试验、化学成分分析等方法分析了爆管发生的原因。结果表明：机组超温运行，使过热器管道严重脱碳和过度氧化，降低了管子的表面强度和抗疲劳性能，从而导致该T23钢屏式过热器管在高温环境下发生了过载拉伸断裂，引发爆管。

Abstract

A tube burst accident of T23 steel platen superheater was found in a subcritical unit during shutdown and maintenance. The causes of tube burst were analyzed by means of macroscopic observation, metallographic examination, scanning electron microscopic analysis, mechanical property test and chemical composition analysis. The results show that the over-temperature operation of the unit resulted in serious decarbonization and over oxidation of the superheater tubes, which reduced the surface strength and fatigue resistance of the tubes. As a result, overload tensile fracture of the T23 steel platen superheater tubes occurred under high temperature environment, which led to tube burst.

导出引用

胥杨, 陈文觉, 马庆谦, 陈乐. 某亚临界机组T23钢屏式过热器爆管原因分析[J]. 理化检验—物理分册, 2019, 55(7): 506-511 https://doi.org/10.11973/lhjy-wl201907017

XU Yang, CHEN Wenjue, MA Qingqian, CHEN Le. Cause Analysis on Tube Burst of T23 Steel Platen Superheater in a Subcritical Unit[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2019, 55(7): 506-511 https://doi.org/10.11973/lhjy-wl201907017

参考文献

[1] 季献武, 段鹏,李驹,等. T23钢在超超临界1000MW机组的应用及现状[J]. 华东电力,2009,37(12):2097-2100.
[2] 王崇斌,周丽萍,林丽平. 锅炉用ASME SA213-T23高强度钢管性能[J]. 锅炉技术,1998(4):27-32.
[3] 王起江,邹凤鸣,赵群义,等. 宝钢T23管高压锅炉管的研制[J]. 宝钢技术,2006(1):59-62.
[4] 夏红伟,杨必应. SA213-T23材料过热器爆管事故的分析与探讨[J]. 特种设备安全技术,2008(4):12-14.
[5] 陈良峰. 600 MW超临界锅炉末过氧化皮脱落爆管原因分析及对策[J]. 电力技术,2010,19(9):53-58.
[6] 赵慧传,孙标,杨红权,等. 超临界600 MW机组锅炉末级过热器管材服役现状分析及改造建议[J]. 热力发电,2013,42(1):1-4.
[7] 梁荣江,刘江波. 600 MW超临界锅炉过热器爆原因及改进措施[J]. 能源技术,2010,31(6):371-374.
[8] 翟德双. 600 MW机组超临界直流锅炉分隔屏过热器爆管原因分析及措施[J]. 华东电力,2007,35(10):78-80.
[9] 黄慧. 700 MW亚临界锅炉T23炉管应用现状[J]. 电工技术,2016(6):94-95.
[10] 金科,聂铭,范振宁,等. T23钢管材老化性能评估[J]. 广东电力,2007,20(2):44-47.
[11] 刘树涛,史志刚,陆军,等. T22高温再热器爆管原因分析[J]. 理化检验(物理分册),2009,45(10):638-644.
[12] 赵慧传,凌荣华,贾建民,等. 新型耐热钢T23的特性与早期失效分析[J]. 中国电机工程学报,2011,31(20):107-113.
[13] 陈云翔,赵丽君,严伟,等. 超超临界火电机组用T23钢的高温蠕变断裂行为[J]. 钢铁,2104,49(2):55-59.