How does a Vacuum-Conveyor work?
A) Suction point - the place or machine, where the material is taken from to be transported, e.g. silo, Big-Bag, granulator, dryer, loading hopper, manual suction lance etc.
B) Vacuum Conveyor
C) Product Unloaing Point - the place or maching, to which the material is transparted or fed into, e.g. reactor, Big-Bag, mixer, press, container, bag filling machine etc.
Vacuum conveyors transport powder, dust, pigments,
granulated material, tablets, capsules, small parts etc. in a suction
air stream under vacuum through hoses or pipes. They are easy to install
and to operate. Even if leakages occur, no product can get into the
environment because of the vacuum.
1. The vacuum pump generates a vacuum in the Vacuum Conveyors separator tank. Air rushes in through the hose/pipe and the suction inlet from the feeding point . The bulk material is aspirated and then carried in this air stream.
2. Inside the separator tank a filter module separates air and product. The transported material is kept and collected in the separator. With fine dust a cyclone element inserted into the separator provides higher transportation capacities because of a lower load of the filter elements.
3. When the separator is filled with product, the vacuum pump switches off, inside of the vacuum conveyor the pressure is balanced to surrounding area within tenths of a second. The separated material discharges from the vacuum conveyor through the discharge element and falls directly into the unit or tank to be charged.
4. Along with the discharging the filter module is cleaned automatically by an air shock system. The occasional filter cake is released from the filter unit. Volkmann offers piston vibrators and fluidizing units to improve the discharging for sticky or highly bridging bulk materials.
5. After unloading the product the discharge element
closes and the whole conveying cycle starts again.
|(C) 2003-2008, Volkmann GmbH, Soest, Germany||