Abstract：Aiming at the problem that CO content in the flue gas of internal combustion hot blast stove exceeded the standard during the combustion period, an improved rectangular burner structure was proposed. A baffle was added to the gas channel to change the flow direction of blast furnace gas. Taking the hot stove of No.3 blast furnace in a company as the research object, three-dimensional model of rectangular burner and combustion chamber of internal combustion hot stove was established. Combustion simulation was carried out by CFD simulation technology for original structure and modified structure of rectangular burner, the gas baffles added to the rectangular burner were placed at three inclination angles of 45°, 60°, and 75°, respectively, and the temperature field and CO concentration field at different inclination angles were analyzed. Compared with the results of original structure, the results show that the high temperature area in temperature distribution of combustion chamber outlet section is enlarged after optimization, and the average volume fraction of CO at the corners of both ends is reduced to a certain extent. When the inclination angle of gas baffle is 60°, the average temperature of outlet section increases the most, the average temperature rises from 1 669 K to 1 676 K, and the average volume fraction of CO in the outlet flue gas decreases the most, from 0.007 028% to 0.005 678%.
GUO Hong-wei, YAN Bing-ji, ZHANG Jian-liang, et al. Optimization of the number of burner nozzles in a hot blast stove by the way of simulation[J].Journal of the Minerals, Metals and Materials Society, 2014, 66(7):1241.
QI Feng-sheng, LIU Zhong-qiu, YAO Chao-yi, et al. Numerical study and structural optimization of a top combustion hot blast stove[J]. Advances in Mechanical Engineering, 2015, 7(2): 709675.
2022, Vol. 32 
