Abstract:

To solve the hard problem that the reduction of heat transfer efficiency on the cooling stave of blast furnace due to fouling deposition,solid particles have been added into the cooling water pipes,forming liquid-solid two-phase flow,which can change the heat transfer and anti-fouling capacities of the cooling water pipes. Under different solid phase volume scores,the heat transfer and anti-fouling capacities of the liquid-solid two-phase flow in the cooling water pipes are studied. The results indicates that because of the perturbation and shearing effect of solid phase particles,not only can the heat transfer coefficient and heat transfer capacity of the cooling water pipes be enhanced,but the anti-fouling capacity be increased. Thus the highly effective running time of the equipment is greatly extended,realizing the long-term highly effective running of the cooling staves.

Key words: cooling stave, liquid-solid two-phase fluid, heat transfer enhancement, anti-fouling capacity

摘要：

针对污垢沉积而导致高炉冷却壁传热效率降低的疑难问题,通过在冷却水管内加入固相颗粒以形成液固两相流,从而改变两相流体对冷却水管的传热和抗垢性能。在不同固相体积分数下进行了冷却水管内液固两相流动的传热和抗垢性能研究。研究结果表明,由于固相颗粒的扰动和剪切效应,不仅可以增大冷却水管传热系数和强化传热效果,而且增强了抗污垢能力,延长了设备的高效运行时间,实现冷却壁的长期高效运行。

关键词: 冷却壁, 液固两相流动, 强化传热, 抗垢性能

CLC Number: 

• X703.1