热装高炉高温煤气喷雾降温塔CFD数值分析  

CFD numerical analysis of flow field in a high temperature gas spray cooling tower of hot charging blast furnace

作　　者：江茂强[1] 刘丹瑶[1] 潘宏[1] 夏朝晖[1] 

机构地区：[1]中冶南方工程技术有限公司能源环保分公司,湖北武汉430223

出　　处：《中国冶金》2016年第2期18-24,共7页China Metallurgy

摘　　要：高炉炼铁采用原燃料热装工艺能显著提高铁前工序显热资源利用效率。为保证高温高炉煤气的净化回收系统安全,须在干法布袋除尘设施前设置1座喷雾蒸发降温塔。采用Fluent软件中的离散相模型对喷雾降温塔内的流场进行了数值模拟,分析得到塔内气相流场、温度场分布以及雾滴运动规律等信息,对比分析了不同喷嘴角度和不同喷雾方向对塔内喷雾降温效果的影响。分析结果表明:采用喷雾蒸发冷却工艺可迅速降低煤气温度,采用雾滴与气体逆流型式且喷嘴角度为30°时,效果最优,雾滴充满塔体整个截面且可完全蒸发。分析结果可为喷雾降温塔的结构设计和喷雾降温过程的优化提供参考。Using hot charging of raw materials and fuels in blast furnace can significantly improve the utilization effi- ciency of sensible heat resources in the iron former process. To ensure the safety of purification and recovery system of the high--temperature blast furnace gas, a spray evaporative cooling tower should be installed before the dry dust bag facilities. The flow field in the spray evaporative cooling tower is numerical simulated by using discrete phase model of Fluent, which reveals the detailed information of gas flow field, temperature field distribution and move- ment of the droplets. The impacts of different nozzle angle and different nozzle spray direction on the cooling effect of the spray tower are comparative analyzed. The results show that the gas temperature could be quickly reduced u- sing spray evaporative cooling process. When the droplet is countercurrent with the gas and the nozzle angle is 30~, the effect will be the best and the droplet can fill the entire cross section of the tower and be completely evaporated. These results can provide a reference for the structural design and spray cooling process optimization of the spray cooling tower.

关 键 词：热装高炉 高温煤气 喷雾降温塔 数值分析 

分 类 号：X757[环境科学与工程—环境工程]