超大吨位一窑两线浮法玻璃熔窑的数值模拟研究

一窑两线浮法玻璃熔窑技术对我国浮法玻璃产业的升级转型和“双碳”目标的实现具有重要意义。本文采用Glass Furnace Model软件,数值模拟分析了1 250 t/d非对称型一窑两线浮法玻璃熔窑的温度分布和玻璃液流规律,利用温度场和液流场,以及快速粒子运动轨迹、粒子的最小滞留时间和平均滞留时间等指标,研究了冷却部的偏心结构设计对出口玻璃液温度均匀性及液流稳定性的影响。结果表明:主线冷却部的玻璃液回流进入支线的比例增加会导致支线冷却部入口玻璃液的温度降低;支线通道长度增加会导致支线流道出口玻璃液温度的降低;采用合适的偏心结构冷却部设计,主线和支线流道出口玻璃液在池窑内的滞留时间差异缩小,玻璃液在均化冷却阶段的横向温度差异减小,主线和支线冷却部玻璃液的液流稳定性提高。

Numerical Simulation of Ultra-Large-Scale Float Glass Furnace with Two Working Ends

The technology of one furnace with two working ends for float glass is significant for upgrading and transformation of float glass industry and achieving carbon peaking and carbon neutrality goals in China. In this study, a numerical simulation of a 1 250 t/d ultra-large-scale float glass furnace with two asymmetric working ends was carried out by using Glass Furnace Model software, and the temperature distribution and glass melt flow character were analyzed. The influence of an eccentric structure design for working ends on glass melt temperature homogeneity and glass melt flow stability at the exits was studied by analyzing temperature contour and melt flow pattern, and comparing trajectories of fastest particles, minimum residence time and average residence time of particles. The results show that the temperature of glass melt at the entrance of branch working ends decreases when the proportion of back flow feeding into the branch working ends increases. Increasing the length of channel connecting the neck and branch working ends leads a lower glass melt temperature at the branch line exit. It is clear that an appropriate eccentric structure design for working ends is beneficial for minimizing the difference of residence time in furnace between glass melt leaving through different working ends. It is also helpful for decreasing the temperature difference of glass melt in horizontal direction during homogenizing and cooling stages as well as increasing the flow stability of glass melt in both of the two working ends.