低氮改造后次高压锅炉炉管失效分析
Failure Analysis of Boiler Tube of Sub-high Pressure Boiler
张鑫 1陈志刚 1孙春生1
作者信息
- 1. 天津市特种设备监督检验技术研究院 天津 300192
- 折叠
摘要
随着国家对大气污染综合治理的力度越来越大,天津市内的锅炉基本完成低氮改造.目前低氮改造的方式有分级燃烧、预混燃烧和燃气再循环燃烧等.在对某台经过低氮改造的燃气次高压锅炉进行内部检验时,发现其炉管上部普遍存在氧化皮,通过金相检测、硬度检测和壁厚检测等方法对炉管进行检测,并且进行失效分析,提出相应的改进措施.
Abstract
With the increasing efforts of the state to comprehensively control air pollution,the boilers in Tianjin have basically completed the low-nitrogen transformation.At present,the methods of low nitrogen transformation include graded combustion,premixed combustion and gas recirculation combustion.In the internal inspection of a low-nitrogen modified gas sub-high pressure boiler,it was found that the upper part of the furnace tube was generally oxidized.The furnace tube was tested by metallograph detection,hardness detection and wall thickness detection,failure analysis was carried out,and corresponding improvement measures were put forward.
关键词
次高压锅炉/炉管/低氮改造/表面燃烧Key words
Sub-high pressure boiler/Furnace tube/Low nitrogen modification/Surface burn引用本文复制引用
出版年
2024
NETL
NSTL
万方数据