The Simulation Of Thermal Processes And Analysis Of Characteristics About Hot Blast Stove

Airheater is a equipment which warm up the forced draught of the blast furnace, and it is also one of the most significant facility of blast furnace airon making product-ion process, the main target of airheater is stable and continued to provide high temperature hot blast for the blast furnace. Regenerator is the only place that the hot stove for heat exchange, checker bricks in the regenerator are the carriers of the heat exchange, showing the efficiency of heat storage and release of the checker bricks directly affect the level of air temperature and hot gas thermal efficiency, the heat transfer area, material, density of the checker bricks and shape of the regenerator have a certain impact on the air temperature. Therefore, it is particularly important that the analysis of the thermal process of airheater and the influence of regenerator thermal characteristics impact on wind temperature.According to the heat transfer characteristics of the regenerator in airheater, the unsteady heat transfer mathematical model of the regenerator is established, and there is a solving demonstration. Then establish the regenerator’s heat transfer process solving simplified model for the analysis of heat transfer process between the single cells under the control of checker bricks and the fluid, and with the help of the software, which named FLUENT, turbulence model, component model and radiation models are set, while simulate the single cells model process course of hot stove regenerator. Finally from the bricks physical parameters and geometric parameters, by changing the size of bricks physical parameters and geometric parameters to analyze the influence that regenerator thermal characteristics impact on air temperature, so as to provide a reliable basis and improvement directions for the design of the stove regenerator checker bricks.Research shows that:the relative error of the simulation results of the maximum outlet temperature gas and the highest actual Gas exit temperature on combustion period is3.14%. The relative error of the simulated average temperature and the actual average temperature of hot air of hot air on supply air period is1.37%, consequently verify the correctness of the model and lay the foundation for the establishment of the analysis of regenerator thermal characteristics.There is a certain influence that regenerator thermal conductivity, density and specific heat impact on the heat transfer efficiency of airheater by the analysis of the simulation results of the regenerator thermal characteristics. The larger three conditions come the larger temperature drop rate of the supply air temperature, also the air temperature is lower and more unstable. Comparatively analysed five-hole, seven-hole and nineteenth-hole three different geometric parameters of heat transfer in checker bricks. Nineteen-hole brick has the highest air temperature, the strongest heating and heat exchange capacity, the most efficient heat regenerator.It shows that:The FLUENT software can simulate the airheater heat transfer process and the working situation of different regenerator thermal parameters effectively. And the simulation results can provide reliable basis for the design of regenerator checker bricks.