加热炉换热器结构与工艺参数优化数值模拟研究

A study on structure and process parameters optimization of a heat exchanger in furnace by numerical simulation

文章以空气预热器为研究对象,采用数值模拟的方法,研究换热器的换热规律及换热高效性。数值模拟结果表明,换热器管子直径越大,换热效果越好。管子横向间距为290~305mm,纵向间距为70~90mm时,换热效果好。优化后的换热器结构为:管径60mm,横向管距300mm,纵向管距离90mm。随着入口空气流速增加,换热效率增加,温度效率降低,空气侧的阻力损失增加。

In this paper,air preheater is used the research object,and the heat transfer law and heat transfer efficiency of heat exchanger is studied used the numerical simulation method. The numerical simulation results showed that the larger the diameter of the heat exchanger tube,the better the heat transfer effect. When horizontal spacing in the range of 290-305 mm and longitudinal spacing is 70-90 mm,the heat transfer effect is best. The optimized heat exchanger structure is that diameter is60 mm,horizontal spacing is 300 mm,longitudinal spacing is 90 mm. As the inlet air flow rate increases,the heat transfer efficiency increases,but the temperature efficiency decreases and the resistance loss on the air side increases.