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Typical faults and countermeasures of flue gas cooler for coal-fired boilers
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Fangfang HU1, 2, Jiyun REN1, Lei DENG1, Yikun WANG3, Defu CHE1, Ying ZOU4
Thermal Power Generation | 2025, 54(7) : 111 - 117
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Thermal Power Generation | 2025, 54(7): 111-117
• Power generation technology forum •
Typical faults and countermeasures of flue gas cooler for coal-fired boilers
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Fangfang HU1, 2, Jiyun REN1, Lei DENG1, Yikun WANG3, Defu CHE1, Ying ZOU4
Affiliations
  • 1.State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
  • 2.China Energy Engineering Group Shaanxi Electric Power Design Institute Co., Ltd., Xi’an 710054, China
  • 3.Huaneng Changjiang Environmental Protection Technology Co., Ltd., Beijing 102209, China
  • 4.School of Foreign Studies, Xi’an Jiaotong University, Xi’an 710049, China
Published: 2025-07-25 doi: 10.19666/j.rlfd.202411238
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With the proposal of “double carbon target”, the pace of low-carbon transformation of power system has been further accelerated. The flue gas waste heat utilization systems have been widely applied in thermal power units. As the core equipment of the flue gas waste heat utilization system, the flue gas cooler has a high failure rate in actual operation due to factors such as limited space in the flue gas layout, high flue dust concentration, and ammonium bisulfate deposition. This not only reduces the recovery of flue gas waste heat, but also increases system resistance, resulting in an increase in fan power consumption and even affecting the unit’s load capacity and environmental emission. On the basis of extensive researches on the operation of more than 250 sets of flue gas coolers in the thermal power industry, typical faults commonly found in flue gas coolers, such as leakage, boiler ash deposition, bottom flue ash deposition, and low-temperature flue gas corrosion, are summarized. The causes of the above typical faults and their coupling relationships are analyzed in depth. Moreover, the targeted preventive measures are proposed to provide guidance for transformation and operation/ maintenance of flue gas coolers.

flue gas cooler  /  leakage  /  ash deposition  /  corrosion  /  preventive measures
Fangfang HU, Jiyun REN, Lei DENG, Yikun WANG, Defu CHE, Ying ZOU. Typical faults and countermeasures of flue gas cooler for coal-fired boilers[J]. Thermal Power Generation, 2025 , 54 (7) : 111 -117 . DOI: 10.19666/j.rlfd.202411238
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  • National Key Research and Development Program(2021YFF0600601)
Appendix
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Year 2025 volume 54 Issue 7
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Article Info
doi: 10.19666/j.rlfd.202411238
  • Receive Date：2024-11-26
  • Online Date：2026-03-06
  • Published：2025-07-25
Article Data
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History
  • Received：2024-11-26
Funding
National Key Research and Development Program(2021YFF0600601)
Affiliations
    1.State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
    2.China Energy Engineering Group Shaanxi Electric Power Design Institute Co., Ltd., Xi’an 710054, China
    3.Huaneng Changjiang Environmental Protection Technology Co., Ltd., Beijing 102209, China
    4.School of Foreign Studies, Xi’an Jiaotong University, Xi’an 710049, China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
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光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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