Research on Resistance Characteristics and Erosion Wear of Coarse Aggregate Filling transportation Pipeline
In order to solve the problem of bending pipe failure caused by erosion of tail salt particles during long-distance transportation,the fluid mechanics theory was introduced to establish the calculation model of the corresponding pipeline,and the area of the maximum erosion rate of the pipeline was determined.The effects of three factors,such as diameter of tail salt particles,particle velocity and curvature radius of bending pipe,on the maximum erosion rate and the maximum erosion area were studied.The results show that with the increase of pipeline length,the pressure in the pipeline gradually decays,and the transportation length of pipeline is proportional to the pressure loss.With the increase of the diameter of tail salt particles,the maximum erosion area of the pipeline changes from the side wall area of the bending pipe to the arch back area.When the diameter of tail salt particles is less than 1.3 mm,the maximum erosion rate increases first and then decreases with the imcrease of particle diameter.When the diameter of tail salt particles is greater than 1.3 mm,the maximum erosion rate increases with the increase of particle diameter.When the diameter of tail salt particles is equal to 1.3 mm,the maximum erosion rate is the smallest.With the increase of the curvature radius of bending pipe,the erosion rate of the tail salt particles on the bending pipe is significantly reduced,and the position of the maximum erosion area is shifted from the upstream of the bending pipe inlet to the middle and lower reaches.It is recommended to select the curvature radius of bending pipe as 2.0-3.0 times the diameter of the bending pipe,and appropriately increase the curvature radius of the second bending pipe.
万方数据
维普
