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A typical example of a pneumatic conveying system that we engineer and manufacture involves conveying a material (such as polymer, lime, soda ash, plastic pellets/powder, dry milk etc.) from a railcar or truck to a silo (or vice versa). Other appliions include intermodal/transloading, inplant transfer, dust control, and portable solutions.
Size distribution affects many other properties critical to consistent performance including: fluidization, powder transport in hoses, uniform cloud density, powder movement in air, electrostatic charging, deposition and build rate, transfer efficiency, Faraday cage penetration, wraparound, and film smoothness.
The heart of the pneumatic conveying system (air mover, solids feeder, pipeline, and separator) is the air mover. Correctly specifying the volumetric flow rate and pressure levels required to move the material will determine system reliability. One must also look at pipe size, distance, and the weight of the material being moved.
The conveying gas volume and velocity are sufficient to keep the material that's being transported in suspension. The material is being conveyed in a continuous manner, and is not accumulating on the bottom of the conveying line at any point. For dilute phase conveying, a relatively high conveying air velocity must be maintained.
The purpose of this project is to develop methods for calculating the instantaneous convey rates for pneumatic conveying systems. Process and systems engineers are often faced with the question of calculating or verifying the required conveying rate for pneumatic conveying systems, based on the batching information, or the ingredient usage rates.