水平管道水力输送粗粒物料的阻力损失研究

Study on the Resistance Loss of Hydraulic Transport for Coarse Particles in Horizontal Pipeline

以深海采矿固液两相流管道输送工艺为应用背景,通过建立管道水力输送模拟系统,研究了不同粒径、不同体积浓度、不同输送速度条件下粗颗粒在水平管道中的阻力损失的变化规律。试验结果表明:颗粒浓度越高,输送速度越大,阻力损失越大。阻力损失与各参数的主要关系有:在保持其他条件不变的情况下,阻力损失与浓度或速度呈指数关系;颗粒运动状态对阻力的变化率有一定的影响。基于试验数据并结合理论分析,提出了阻力损失计算公式。

Taking the solid-liquid phase flow pipeline transport technology of deep-sea mining as the applied background,the law of resistance loss changing in horizontal pipeline under conditions of different particle size,volume and concentration,and conveying velocity were investigated by building the simulation system of hydraulic pipeline transport.The results showed that the higher volume concentration or the greater transportation velocity is,the more resistance loss would be.The relationships between the resistance loss and each parameter are as following.If other conditions stay the same,there is the exponential relationship between the resistance loss and the concentration or the velocity.Particle＇s movement has a certain effect on the rate of resistance changing.Based on the experimental data and the theoretical analysis,the formula for calculating the resistance loss was proposed.