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Research on the technology of replacing lean coal with Shenhua bituminous coal for opposed firing boilers
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Yanfu JIA1, Miao MIAO2, 3, Guangpeng LIU3, Guangyou LIU1, Wu ZHOU2, 3, Jianwen XIE4, Jianxiu ZHANG1, Zhangning YANG2, 3, Shenming RAN2, 3
Thermal Power Generation | 2025, 54(9) : 171 - 178
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Thermal Power Generation | 2025, 54(9): 171-178
• Thermal energy science research •
Research on the technology of replacing lean coal with Shenhua bituminous coal for opposed firing boilers
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Yanfu JIA1, Miao MIAO2, 3, Guangpeng LIU3, Guangyou LIU1, Wu ZHOU2, 3, Jianwen XIE4, Jianxiu ZHANG1, Zhangning YANG2, 3, Shenming RAN2, 3
Affiliations
  • 1.National Energy Liaocheng Power Generation Co., Ltd., Liaocheng 252000, China
  • 2.Energy Cleaning and Low-Carbon Thermal Conversion Utilization Technology and Equipment Key Laboratory of Sichuan Province, Chengdu 611731, China
  • 3.Dongfang Boiler Co., Ltd., Zigong 643001, China
  • 4.China Energy New Energy Technology Research Institute Co., Ltd., Beijing 102211, China
Published: 2025-09-25 doi: 10.19666/j.rlfd.202411259
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To solve the problems of slagging and burner burnout caused by lean coal boilers which convert to firing Shenhua bituminous coal, a 600 MW supercritical opposed firing boiler was taken as the research object. Through thermal calculation and numerical simulation analysis, a feasibility study for the combustion system retrofit scheme was carried out with emphasis. The results show that, by adopting differentiated heat load design, inclined installation of side wall burners into the furnace, and multiple dimensions of wall mounted wind, the heat load in the burner area reduced from 1.71 MW/m2 to 1.44 MW/m2, and the flue gas temperature at the furnace outlet decreased from 1 058 ℃ to 1 010 ℃. The performance test results after the retrofit show that at rated load, the unburnt carbon content of coal ash decreased from 6.06% to 1.42%, the boiler efficiency increased from 92.76% to 94.03%, and the NOx emissions at the furnace outlet reduced by 50%~60% at various loads. The boiler can operate safely and efficiently for a long period. The proposed transformation technology scheme has guiding significance for the optimization and retrofit of combustion systems of similar units under the condition of converting low volatile coal to bituminous coal.

opposed firing boiler  /  coal adaptability  /  differentiated heat release rate  /  engineering verification
Yanfu JIA, Miao MIAO, Guangpeng LIU, Guangyou LIU, Wu ZHOU, Jianwen XIE, Jianxiu ZHANG, Zhangning YANG, Shenming RAN. Research on the technology of replacing lean coal with Shenhua bituminous coal for opposed firing boilers[J]. Thermal Power Generation, 2025 , 54 (9) : 171 -178 . DOI: 10.19666/j.rlfd.202411259
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Year 2025 volume 54 Issue 9
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doi: 10.19666/j.rlfd.202411259
  • Receive Date：2024-11-27
  • Online Date：2026-03-05
  • Published：2025-09-25
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  • Received：2024-11-27
Affiliations
    1.National Energy Liaocheng Power Generation Co., Ltd., Liaocheng 252000, China
    2.Energy Cleaning and Low-Carbon Thermal Conversion Utilization Technology and Equipment Key Laboratory of Sichuan Province, Chengdu 611731, China
    3.Dongfang Boiler Co., Ltd., Zigong 643001, China
    4.China Energy New Energy Technology Research Institute Co., Ltd., Beijing 102211, China
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表12种不同金属材料的力学参数
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
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
小菇属 Mycena 11 5.26
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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