Abstract：With the continuous improvement of engineering design requirements and the enhancement of numerical calculation methods, it is currently possible to use computational methods to clarify the details of heat transfer process for hot blast stove regenerator and provide optimization guidance for design work. The regenerators of 5 blast furnace hot blast stoves were analyzed, and the relationship between optimization conditions, optimization objectives and the optimization variables was discussed for the design guidance of regenerators. Under optimization conditions, the optimal variable was proposed by comparing different variables objectives. Taking physical properties, process requirements, gas parameters, and operations of commonly used refractory materials in engineering practice as optimization conditions, the geometric dimensions of checker bricks, geometric dimensions of regenerator and the height of regenerator in different refractory sections as optimization variables, the heat transfer process of regenerator for 5 blast furnace hot blast stoves was analyzed using numerical calculation methods, then obtained the heat transfer process parameters of regenerator. Compared the numerical analysis results and analyzed their relationship with optimization objectives such as investment and hot air temperature drop during the air supply period. The numerical analysis results of regenerator for 5 blast furnace hot blast stoves show that the dominant factor of temperature distribution in the height direction of regenerator is the height of regenerator, and the regenerator height in different refractory sections is limited by the usage temperature of refractory. The dominant factor in heat transfer flow is operating system. The correlation between thermal radiation heat transfer and surface blackness of regenerator is relatively low, while geometric size of structural checker bricks is not the dominant factor in the resistance loss of regenerator. Based on the analysis results, optimization suggestions for 5 blast furnace hot blast stoves are provided. The standard number composed of optimization conditions and variables can be used for quantitatively determining the temperature drop of hot air during the air supply period. The appropriate height to diameter ratio for regenerator and the relationship between the number of hot blast stove, operating system and geometric dimensions of checker bricks are also suggested. These conclusions can serve as guidance for future design work.
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2023, Vol. 33 
