急冷风速差对三层发泡陶瓷隧道窑的影响分析

Analysis of the Influence of Rapid Cooling Air Speed Differences on Three-layer Foamed Ceramic Tunnel Kiln

三层发泡陶瓷是一种以工业固废为原料经1200℃高温烧制成兼备轻质、耐磨、防火、防潮等特性的新兴绿色建筑材料,结合隧道窑批量烧制而成的发泡陶瓷其优质特性更加明显。在冷却发泡陶瓷的隧道窑急冷段,常出现冷却不均匀、产品断裂的现象,直接影响产品产量和品相。研究急冷风速差对隧道窑烧制发泡陶瓷的影响,以优化急冷风速的选取。通过使用Fluent进行数值模拟计算,并对比分析10 m/s、11 m/s、12 m/s、13 m/s的急冷风温度场、速度场,得出12 m/s急冷风对三层发泡陶瓷的急冷效果最优。

Three-layer foamed ceramic is a kind of environment-friendly new building material which is made of industrial solid waste and fired at 1200 ℃, featuring light weight and resistance to wear, fire and moisture etc,. When fired in tunnel kiln in large quantities, three-layer foamed ceramics would show more obvious high-quality characteristics. In the quenching section of tunnel kiln for cooling foamed ceramics,uneven cooling and product breakage often occur, which directly affects the product yield and product appearance. The influence of quenching air speed differences on the firing of foamed ceramics in tunnel kiln was studied to optimize the selection of quenching air speed. Through numerical simulation calculation with Fluent, and comparative analysis of the temperature field and velocity field of 10 m/s, 11 m/s, 12 m/s and 13 m/s, it is concluded that the quenching effect of 12 m/s is the best for three-layer foamed ceramics.