Corrosion and viscous ash deposition of a rotary air preheater in a coal-fired power plant

被引：71

作者：

Chen, Heng ^{[1
]}

Pan, Peiyuan ^{[1
]}

Shao, Huaishuang ^{[1
]}

Wang, Yungang ^{[1
]}

Zhao, Qinxin ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Key Lab Thermofluid Sci & Engn MOE, Xian 710049, Shaanxi, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2017年 / 113卷

基金：

中国国家自然科学基金;

关键词：

Air preheater; Coal-fired power plant; Dew point corrosion; Viscous ash deposition; Sulphuric acid condensation; DEW-POINT CORROSION; FAILURE ANALYSIS; TEMPERATURE; MECHANISM; TUBE;

D O I：

10.1016/j.applthermaleng.2016.10.160

中图分类号：

O414.1 [热力学];

学科分类号：

070201 [理论物理];

摘要：

The corrosion and viscous ash deposition characteristics of a rotary air preheater were investigated. Deposit samples and corroded heat transfer elements were taken from the air preheater of a 300 MW coal-fired power plant in China and analyzed by X-ray fluorescence, X-ray diffraction and scanning electron microscope equipped with energy dispersive X-ray spectroscopy. The results show that the serious corrosion and viscous ash deposition were both caused by sulphuric acid condensation rather than ammonium bisulfate deposition. The mechanisms of corrosion and viscous ash deposition were discussed and the coupling formation model of corrosion and viscous ash deposition was proposed. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：373 / 385

页数：13

共 30 条

[1]

Estimation of combustion flue gas acid dew point during heat recovery and efficiency gain [J].