Negative-and Positive-Pressure Pneumatic Conveyings

In a pneumatic conveying system, either positive or negative, materials are first fed into a conveying pipeline and then carried along the pipeline by the gas flow. After reaching the destination, particles are separated from the gas stream and collected in receiving bins. The 

Blowers, fans, and vacuum pumps can be used as gas movers to provide necessary energy to transport the solids. In a negative-pressure conveying system, the vacuum pump is located downstream of the material collection device. In the positive-pressure conveying systems, the blowers or fans are installed upstream of the solids feeding equipment. The selection of a gas mover is primarily based on gas flow rate and pressure drop requirements for the successful transport of solids. 

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