深海矿石输送设备输送特性研究

Exploring Conveying Characteristics of Deep-sea Ore Transporting Equipment

为研究深海矿石输送设备输送特性,运用计算流体力学理论和Fluent软件对设备内固液两相流进行三维仿真,研究喷射速度、泵水速度、喷射高度和颗粒粒径对出料质量流量和出口处颗粒平均速度的影响规律。研究结果表明:随喷射速度的增加,出料质量流量先增大后减小,存在最佳喷射速度,出口处矿石平均速度基本呈线性增加;随泵水速度增加,出口处矿石颗粒平均速度大致呈直线上升,出料质量流量变化不大;随喷射高度增加,出料质量流量先上升后下降,在喷射高度为500 mm时最大,而出口处矿石平均速度基本不受影响;随颗粒粒径的增大,出料质量流量先急剧增大,当粒径超过15 mm时缓慢上升,最后缓慢下降,出口处颗粒平均速度基本不受粒径的影响。

To study the conveying characteristics of deep-sea ore conveying equipment,the three-dimensional simulation of solid-liquid two-phase flow in ore conveying equipment was carried out with the computational fluid dynamics theory and the Fluent software.The effects of jet velocity,pumping speed,jet height and particle size on the discharge mass flow rate and average velocity of particles at the outlet was studied.The simulation results show that with the increase of injection velocity,the discharge mass flow first increases and then decreases,there is an optimal injection speed,and the average velocity of ore particles at the outlet increases linearly and increases substantially linearly as the pumping speed increases,but the discharge mass flow does not change much.The discharge mass flow rate rises first and then decreases with the change in injection height,and has an optimal value when the injection height is 500 mm.The change in injection height has no effect on the average velocity of the ore particle at the exit.With the increase of particle size,the discharge mass flow rate increases sharply.When the particle size exceeds 15 mm,it slowly rises and finally decreases slowly.The average velocity of the ore particles at the outlet is basically not affected by particle size.