Development of a natural gas hot blast furnace based on CFD simulation

To meet the requirements of drying processes, this paper proposes a theoretical design method for anatural gas-fired hot blast furnace suitable for this scenario, while establishing a numerical model for it.It also focuses on analyzing the influence laws of three types of geometric parameters?air inlet angle,air inlet diameter, and combustion chamber length?on the internal flow field of the furnace and theoutlet temperature. The simulation results show that increasing the air inlet angle of the cooling chambercan significantly optimize the temperature distribution; reducing the air inlet diameter can effectivelyincrease the air inlet velocity and further improve the outlet temperature uniformity; while under thesame heat output condition, the combustion chamber length has a negligible impact on the outlettemperature. However, when the air inlet velocity is relatively high, increasing the combustion chamberlength can enhance the outlet temperature uniformity. The experimental verification results indicate thatthe experimental data are in high agreement with the numerical model. Through the integration oftheoretical calculations and numerical simulations, this study has further improved and refined thedesign method of natural gas-fired hot blast furnaces specialized for drying processes.