螺纹管冷却壁传热分析及结构优化研究

将螺纹管应用于高炉冷却壁，利用Fluent软件建立螺纹管冷却壁数学模型，通过数值模拟对螺纹结构进行了优化。建议螺纹管结构参数：肋条数4，肋高1 mm，肋宽5~7 mm，导程20~30 mm。与普通圆管冷却壁的对比研究表明：在冷却水流速为2 m/s工况下，螺纹管冷却壁热面最高温度下降5.6%，但水管进出口压差增长1.69倍；同等冷却效果下，螺纹管冷却壁可节省冷却水量55%；发生缺水事故时，螺纹管冷却壁热面最高温度下降22.4%，能有效降低缺水危害，保护冷却壁。

Study on Heat Transfer Analysis and Structural Optimization of Cooling Stave with Internal Ribbed Tube

The internal ribbed tube is applied to the blast furnace cooling stave.The mathematical model of the cooling stave with internal ribbed tube is established by using Fluent software,and the structure of the internal ribbed tube is optimized by numerical simulation.It is suggested that the structural parameters of the internal ribbed tube should consist of 4 ribs with rib height of 1 mm,rib width of 5 mm to 7 mm and screw lead of 20 mm to 30 mm.The comparative study on the cooling staves with internal ribbed tube and common circular tube shows that the maximum temperature of the hot surface of the cooling stave with internal ribbed tube decreases by 5.6%,but the pressure difference between the inlet and outlet of the water pipe is increased by 1.69 times under the working condition of cooling water flow rate of 2 m/s.On the premise of the same cooling effect,the cooling water consumption of the cooling stave with internal ribbed tube can be saved by 55%.In the case of water shortage accident,the maximum temperature of the hot surface of the cooling stave with internal ribbed tube decreases by 22.4%,which can effectively reduce the harm of water shortage and protect the cooling stave.