期刊
APPLIED THERMAL ENGINEERING
卷 113, 期 -, 页码 373-385出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2016.10.160
关键词
Air preheater; Coal-fired power plant; Dew point corrosion; Viscous ash deposition; Sulphuric acid condensation
资金
- National Natural Science Foundation of China [51606144]
- National Key Research and Development Program of China [2016YFC0801904]
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.
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