期刊论文

中文

广州化工

1001-9677

2017

1

73-76

10.3969/j.issn.1001-9677.2017.01.025

本校为第一机构

研究了在给水AVT(O)工况下超临界机组不同部位炉管腐蚀和成膜特性.比较了省煤器、 水冷壁、 低温再热器和低温过热器入口段炉管氧化膜的异同,并分析了其成膜机理.研究表明:水冷壁、 再热器氧化物颗粒比省煤器氧化物更为均匀,过热器氧化物均匀性最差;省煤器、 水冷壁氧化物颗粒尺寸大于过热器和再热器;省煤器生成具有"双层保护膜"的三层结构氧化物;水冷壁生成内伸层和疏松外延层构成的双层结构氧化物,且外层和内层无明显富Cr现象;过热器生成了外层富Fe、 中层富Cr和内层为过渡层的三层结构氧化物.

The corrosion and film forming characteristics of the different parts boiler tubes of supercritical units under AVT（ O） were studied. The similarities and differences of oxide film of economizer,waterwall and the inlet tube of low temperature reheater and low temperature superheater were compared and the mechanism of film formation were analyzed.It was found that the oxide particles on waterwall and reheater was more uniform than economizer,uniformity of oxide on superheater was the worst. The oxide particle size of economizer and watewall we...