State Key Laboratory of Mesoscience and Engineering, Institute of Process Engineering, Chinese Academy of Sciences;Beijing Tsinghua Industrial R&D Institute;Department of Energy and Power Engineering, Tsinghua University,Haidian District;State Key Laboratory of Low-carbon Smart Coal-fired Power Generation and Ultra-clean Emission, (China Energy Science and Technology Research Institute Co.,Ltd.);
[Objective] Ammonia-coal co-firing is of great significance in promoting the clean and low-carbon transformation of energy structure. To study the influence of ammonia co-firing ratio on combustion characteristics, [Methods] a thermal calculation model of a 300 MW coal-fired boiler was set up based on the energy balance method. The changes in fuel consumption, boiler efficiency, and flue gas characteristics with ammonia ratios were investigated in this paper. Furthermore, the analysis of the variation of furnace radiation attenuation coefficient and blackness with ammonia ratios were also conducted. [Results] The results show that the ammonia ratio increases from 0 to 40%, the heat loss of exhaust gas increases by 5.3%, the boiler efficiency decreases by 0.21%, the flue gas volume increases by 6.2%, the water content in the flue gas increased by 64.2%, and the triatomic gas content decreased by 41.4%,the water dew point increases by 11.9%, the theoretical combustion temperature decreases by 46 ℃, and the furnace outlet temperature increases by 8 ℃. The acid dew point reaches a maximum value of 135 ℃ at 40% ammonia ratio. The flame radiation attenuation coefficient and flame radiation absorption rate, the flame and furnace blackness, gradually decrease with the increase of ammonia ratio in fuel. When the ammonia blending amount of coal-fired generating units is 43%, the carbon emission is consistent with the carbon emission of gas-fired generating units with the same capacity. [Conclusion] The results can provide important support for the development of ammonia-coal co-firing technology, the design of boiler heating surface, and the selection of operating parameters of pollutant control equipment.
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Basic Information:
DOI：10.19944/j.eptep.1674-8069.2025.02.012
China Classification Code:TM621.2
Citation Information:
[1]王翔,王雪,侯宗余等.300 MW煤粉锅炉氨燃料掺烧对锅炉烟气特性的影响分析[J].电力科技与环保,2025,41(02):294-302.DOI:10.19944/j.eptep.1674-8069.2025.02.012.
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低碳智能燃煤发电与超净排放全国重点实验室开放课题