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Several Factors Affecting Pipe Wear in Pneumatic Conveying System

   Pneumatic conveying system is applied to the transportation and dust removal of various powder and granular materials. Due to the characteristics of high density of the conveyed materials, the abrasion problem of pneumatic conveying pipelines has seriously affected the continuity of industrial production and transportation. Attaching importance to the problems of pipeline wear and solving them reasonably has great significance for energy conservation and consumption reduction. So what are the factors related to the wear of pneumatic conveying pipes? Let's analyze it for everyone.
1. Conveying speed Media speed is the main factor affecting erosion wear rate.
2. Particle shape The influence of particle shape on erosion wear is mainly reflected by its influence on the wear mechanism. When particles hit the target, the contact area between the particles and the target determines the strength of the interaction between the two. The erosion of sharp-shaped particles on the surface of plastic materials is mostly cutting wear, and the wear caused by spherical particle erosion is mainly plastic deformation wear.
3. Particle strength Particle strength mainly affects the crushing difficulty and crushing rate of particles during transportation, and the secondary wear caused by them. The average particle size of the conveyed material decreases with the increase in the number of elbows. The more obvious this trend of particle size reduction is, the higher the erosion wear rate caused by the corresponding material to the elbow, that is, the more easily the particles are broken during the transportation process, the higher the erosion wear rate they generate.
4. Particle size The effect of particle size on the elbow erosion wear is similar to that of conventional erosion wear, that is, erosion wear under different pneumatic conveying conditions. Erosion wear rate increases rapidly with increasing particle size.
5. As the particle concentration increases, the total mass loss of the elbow decreases, that is, the erosion wear caused by particles per unit mass decreases. Due to the increase of the suspension concentration, the probability of collision between particles also increases, and the impact tube Particle kinetic energy of the wall is reduced.
6. Impact angle The impact angle refers to the angle between the incident particle trajectory and the target surface. The difference in impact angle mainly affects the tangential and normal components of the kinetic energy when the particles impact the target, and the energy consumption during the impact. For impact particles, the tangential component of the kinetic energy generates cutting, while the normal component affects the depth of the particles pressed into the target surface. Both of them determine the amount of wear.
Knowing these factors that affect the pipeline wear of pneumatic conveying systems, what should we do to reduce the impact of wear on production and extend the service life of the pipeline? Various measures have been taken in the industry to reduce the abrasion of pneumatic conveying pipelines, and the optimal design and material selection of the pipeline shape are relatively good ways to reduce wear.
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2020/02/06 15:53:47 61 times

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