Journal
ENERGY
Volume 263, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2022.125906
Keywords
Bio-syngas; CFD; Blast furnace; Co-injection; Numerical simulation
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In order to effectively utilize biomass as a supplementary fuel for pulverized coal injection (PCI) technology, a co-injection process of bio-syngas/coal into the blast furnace (BF) is designed. A 3D CFD model with double lance is established to investigate the co-injection process. The effects of bio-syngas injection rates and the location of the double lance on the thermochemical behavior of pulverized coal (PC) are analyzed.
To rationally utilize biomass as an auxiliary fuel for pulverized coal injection (PCI) technology, the process of coinjection of bio-syngas/coal into the blast furnace (BF) is designed. In this paper, a 3D CFD model with double lance is established to investigate the co-injection of bio-syngas/coal in the BF. The effects of bio-syngas injection rates and the location of double-lance on the in-furnace thermochemical behavior of pulverized coal (PC) are systematically analyzed. The results show that the combustion of the bio-syngas promotes the devolatilization of the PC, but hinders the volatile matter (VM) combustion. As the bio-syngas injection rate increases, the volumeaverage temperature of the raceway and the endpoint burnout of PC increases; In addition, a reduction in the distance between the bio-syngas lance and the tuyere, or an increase in the distance between the two lances, can facilitate the PC to obtain more oxygen and have a better endpoint burnout. However, the rise of the coal plume reduces the space for the particles to recirculate, resulting in a reduction in the overall burnout of the PC.
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