In the process of air slide conveyor transportation, the problem is all on the pipeline, the main problems are blockage, wear, condensation, air leakage, and other problems. Therefore, the design and configuration of the pipeline system should reduce the number of pipe sections as much as possible under the condition that the process requirements are met, and the installation of the pipeline should be as horizontal and vertical as possible to avoid the appearance of inclined pipes.
Three main reasons for pipeline blockage
There are many reasons for pipeline blockage of the air slide conveyor, mainly due to changes in design parameters, incomplete understanding of material characteristics, pipeline installation and layout not meeting process requirements, improper operation, and other reasons.
The design parameters have changed
For the pressure feed type air slide conveyor, the long-term operation of the air compressor and the roots blower causes wear, improper maintenance, excessive air humidity, etc., so that the material cannot reach the conveying speed in the conveying pipeline, and the material begins to descend. After a long period of time, it began to accumulate, and it was manifested as a gradual increase in the on-site delivery pressure, and the current of the gas source system exceeded the standard.
The material parameters are not well understood
Many materials have unique characteristics. If you do not understand the impact on transportation, it is difficult to successfully carry out pneumatic conveying(air slide conveying). The parameters of the material affect the air slide conveying system in the following points, including temperature, humidity, viscosity, and fluidity. , plasticity, etc., or the material properties of the material have changed in the middle, such as the increase in humidity, the influence of the outside temperature, etc., because the material is transported in a closed pipeline in the pipeline, it is not easy to detect, and the blockage often occurs suddenly and is caught off guard.
Pipeline installation and layout not meeting process requirements
Due to the unreasonable attention to the pipeline and the unreasonable process layout, it is better to set a horizontal straight pipe section with a length of more than ten meters at the outlet of the pressure-feeding pneumatic conveying pipeline, so that the material can be fully accelerated here. If this point is ignored in the design or the layout It is difficult to achieve the above because the initial gas flow rate is too low and the kinetic energy is too small, so the first elbow cannot overcome the rising resistance and is blocked. In the arrangement of the conveying pipeline, it is best to use the horizontal and vertical combination method for piping, because according to fluid mechanics, the movement of the material in the vertical pipeline requires the least energy consumption, and only needs to overcome the gravity of the material to move. In the horizontal tube, the gravity of the material needs to be overcome and the material must be accelerated to move. The material forms a parabolic trajectory, and in the inclined pipe, not only all the forces in the straight pipe must be overcome, but also the sliding force of the material inclined downward. Therefore, the appearance of inclined pipes should be avoided as much as possible.
