Research on high-temperature corrosion mechanism of high-alkali coal combusted in power station boilers and preventive measures

DU Baocang; MA Guowei; ZHOU Lei; WANG Shimin

doi:10.3969/j.issn.1672-3643.2024.06.013

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Research on high-temperature corrosion mechanism of high-alkali coal combusted in power station boilers and preventive measures

更新时间：2026-06-20

- Research on high-temperature corrosion mechanism of high-alkali coal combusted in power station boilers and preventive measures
- Ningxia Electric Power Issue 6, (2024)
- 作者机构：
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- DOI：10.3969/j.issn.1672-3643.2024.06.013
  CLC：
- Online First：11 December 2024，
  
  Published：2024
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DU Baocang, MA Guowei, ZHOU Lei, et al. Research on high-temperature corrosion mechanism of high-alkali coal combusted in power station boilers and preventive measures[J]. Ningxia Electric Power, 2024, (6).
DOI：

DU Baocang, MA Guowei, ZHOU Lei, et al. Research on high-temperature corrosion mechanism of high-alkali coal combusted in power station boilers and preventive measures[J]. Ningxia Electric Power, 2024, (6). DOI： 10.3969/j.issn.1672-3643.2024.06.013.

摘要

针对某电站锅炉掺烧新疆高碱煤后水冷壁减薄速率过快导致爆管泄漏问题，通过对炉内水冷壁整体外观检查、金相分析及入炉煤质化验结果，确定为典型的硫酸盐型高温腐蚀。根据分析结果从入厂煤管理、配煤掺烧、运行优化及检修管理方面提出相应的调整和预防控制措施。通过1个检修季的对比分析结果，腐蚀速率已得到有效控制。

Abstract

This study addresses the rapid thinning of the water-cooled wall in a power station boiler

leading to pipe leakage when blending Xinjiang high-alkali coal.A comprehensive inspection of the furnace’s water-cooled wall

along with metallurgical analysis and coal quality testing results

identifies the issue as typical high-temperature corrosion of the sulfate type.Corresponding adjustments and preventive control measures are proposed

focusing on the management of incoming coal

coal blending

operational optimization

and maintenance management.Comparative analysis over one maintenance season indicates that the corrosion rate has been effectively controlled.

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