高温散状料强制冷却问题研究

Study on Forced Cooling Problem of High Temperature Balk Cargo

连续式石墨化炉生产的散状料温度可达2 600℃左右,由于高温下实验条件的限制,为研究高温散状料的强制冷却情况,运用Fluent软件对优化后的冷却器进行数值模拟,得到了高温物料冷却过程的温度分布.结果表明,在冷却器入口处温度较高,为保护冷却器,需添加耐高温材料;冷却器出口处物料温度已降到324 K,远低于指标要求,冷却效果显著;两级冷却器的出水温度均满足要求.模拟结果与测试结果比较吻合,该模拟方法适用.对优化后的冷却器效果进行了检验,并为进一步优化提供了参考依据.

The temperature of balk cargo graphite produced by continuous graphitizing furnace was approximately 2 600 ℃. Experiments were limited by the high temperature. In order to study the forced cooling situation of high temperature balk cargo, the numerical simulation was conducted on the optimized cooling unit by using the software Fluent. The temperature distributions of the cooling process for graphite were obtained. The results showed that the inlet temperature of the cooling unit is very high. To protect the cooling unit, heat-resisting materials are required. The outlet temperature falls to 324 K, which is much lower than the requirement. The cooling effect is remarkable. Both of the outlet temperatures of the water in two stage cooling units meet the requirements. There are in good agreement between the simulation results and the measurements. According to the simulation results, the cooling effect is tested and the further optimization for the optimized cooling unit is guided.