一种提高喷雾通风冷却塔换热效果的方法

摘要

Cooling tower is the core equipment in the circulative water system of CDQ and its performance directly influences the power output and water consumption rate in the coke dry quenching system. Problems such as poor heat transfer, serious wall flow and tower body vibration occurred during operation of the spray cooling tower at the coke dry quench-ing system of Masteel. In the paper the basic principle of spray cooling tower was analyzed, a mathematical model was established and numerical simulations were carried out with fluid dynamics calculation software to found out the direct relationship between poor transfer and wall flow. A solution to increase the injecting angle and reduce wall flow by injector hole shrinkage was finally put forward, which effectively improved heat transfer.%冷却塔是干熄焦循环水系统的核心设备，其换热效果直接影响干熄焦发电量和耗水率。马钢干熄焦系统中应用的喷雾通风冷却塔在使用中出现换热效果不佳、壁流严重以及塔体振动等问题。分析了喷雾通风冷却塔的基本原理，建立其物理模型，并使用计算流体力学软件进行数值计算，找出了其换热效果差与壁流有直接的关系。最后提出了一种解决方案，通过对喷嘴缩径提高射流角度，减少了壁流，从而有效地提高了换热效果。