Pneumatic conveying systems
In a pneumatic conveying system, solids are conveyed through a pipe using an airstream. Depending on the application, one of the following designs is used:
- Using a push system, the blower is placed in front of the transport and blows the material through the pipe.
- When using a transport fan, a specially designed fan that is suitable for material conveying is places between the material feeding and discharge.
- In a suction system the blower is placed after the material discharge, the material is sucked through the conveying line.
To feed the material a rotary valve or a specially designed chute is used, sometimes the material is directly sucked from a bunker, mill or chute. For the separation of the airstream and the material, mostly a cyclone and a dust filter are used. Often the material is directly blown into a silo.
As a blower centrifugal fans, side channel blowers, rotary lobe blowers or compressed air nozzles are used. Typical applications are the conveying of plastic or salt.