基于数值模拟的马蹄焰玻璃窑蓄热室热效率研究

The regenerator is an important equipment for waste heat recovery and energy recycling in a horseshoe flame glass furnace, and it plays an important role in reducing the overall energy consumption of the glass furnace. A regenerator with low thermal efficiency not only causes a large amount of energy waste, but may also reduce the service life of the glass furnace. Improving the thermal efficiency of the regenerator has become an urgent problem to be solved in the glass industry. In order to study the influence law of regenerator parameters on thermal efficiency, first, a numerical simulation model of the regenerator was established by using the computational fluid dynamics theory and the porous media model. Then, combined with the heat balance analysis and the change law of gas thermodynamic properties, a thermal efficiency model of the regenerator was established. Finally, Fluent was used to simulate the internal temperature field and velocity field of the regenerator under different parameters. At the same time, the thermal efficiency calculation data was collected from the temperature field and the influence law of each parameter on the thermal efficiency of the regenerator was analyzed. The results show that: on the premise of ensuring sufficient fuel combustion, reducing the inlet velocity of combustion-supporting air, the porosity of the checkerwork, and the equivalent diameter of the checker brick is beneficial to increasing the heat transfer between the air and the checkerwork and improving the thermal efficiency of the regenerator, and the thermal efficiency of the regenerator is higher when the inlet area of the flue port is 0.9 - 1 m².

蓄热室是马蹄焰玻璃窑余热回收、能源循环再利用的重要设备,它对于降低玻璃窑炉整体能耗有着重要的作用。热效率低的蓄热室不但会造成大量的能源浪费,还可能会减少玻璃窑炉的使用寿命,提高蓄热室的热效率已经成为了玻璃产业亟待解决的问题。为了研究蓄热室参数对热效率的影响规律,首先运用计算流体力学理论和多孔介质模型建立了蓄热室的数值仿真模型,然后结合热平衡分析和气体热力学性质变化规律,建立蓄热室热效率模型,最后运用Fluent对不同参数下蓄热室内部温度场与速度场进行仿真,同时从温度场中采集热效率计算数据并分析各参数对蓄热室热效率的影响规律。结果表明:在保证燃料燃烧充分的前提下,减小助燃空气进口速度、格子体孔隙率、格子砖当量直径有利于增大空气与格子体的传热量,提高蓄热室的热效率,而烟道口进口面积在0.9~1 m~2时蓄热室的热效率较高。