Modeling and determination of total heat exchange factor of regenerative reheating furnace based on instrumented slab trials
Modeling and determination of total heat exchange factor of regenerative reheating furnace based on instrumented slab trials
复制标题
基于仪表化板坯试验的蓄热式加热炉总换热系数建模与确定
DOI：
10.1016/j.csite.2021.100838
复制
发表时间：
2021-01-19
影响因子：
6.8
通讯作者：
Yi, Zhi
中科院分区：
文献类型：
--
作者：
Ji, Wenchao;Li, Guojun;Yi, Zhi
蓄热式加热炉作为一种高效节能的加热设备，在钢铁工业中得到了广泛的应用。准确了解蓄热式加热炉的总换热系数对提高蓄热式加热炉的在线控制性能具有重要意义。为此，对蓄热式加热炉总换热系数的确定进行了研究。在分析蓄热式加热炉传热过程的基础上，建立了蓄热式加热炉的三维数学模型。采用分区法求解气区、板面区和壁面区温度，采用蒙特卡罗法计算热电偶与炉内其他区域的总辐射交换面积。确定了蓄热式加热炉的总换热系数，分析了生产率、燃料消耗量、板坯热装温度等热参数和操作参数对蓄热式加热炉的影响。结果表明：总传热系数随燃料消耗量或板坯热装温度的降低而增大，随生产率的提高而增大；本文的工作对蓄热式加热炉在线控制数学模型总换热系数的动态补偿具有一定的参考价值。
Regenerative heating furnace as a high-efficiency and energy-saving heating equipment is widely applied in iron and steel industry. Accurate knowledge of total heat exchange factor of regenerative heating furnace is of great significance to improve its on-line control performance. Therefore, determination of total heat exchange factor of regenerative reheating furnace is investigated in this work. A three-dimensional mathematical model of regenerative reheating furnace based on the analysis of heat transfer process is established. The zonal method is used to solve the temperatures of gas zone, slab surface zone and wall surface zone, in which the Monte Carlo method is used to compute the total radiant exchange areas of thermocouple to all other zones in the furnace. The total heat exchange factors of regenerative reheating furnace are determined and the effects of thermal and operational parameters, such as productivity, fuel consumption and slab hot charging temperature are analyzed. The results show that the total heat transfer factor increases with the decrease of fuel consumption or slab hot charging temperature, and increases with the increase of productivity. The present work is valuable for dynamical compensation of total heat exchange factor of the online control mathematical models in regenerative reheating furnace.