This may work in the short term but eventually dents the hopper, increasing the severity of the problem. Incorrect hopper design is usually a result of the designer not understanding the characteristics of the materials being hoppered or the materials might have changed since the hopper was installed.
Due to the enormous range of materials being stored and their unique properties, various flow promotion devices can be used to encourage material discharge. One such devise is the New Bin Master Airbrator now stocked locally by Fresco Systems Australasia.
The Airbrator combines aeration and vibration to solve the most difficult material flow applications. The special design creates a vibration as the air flows between the pads boot and the hopper wall.
This provides a very effective flow aid for all types of dry products. Plus, Airbrator pads don't require a specific air pressure for operation. You can use a blower at 35kpa or high pressure air at 415kpa.
Air is introduced into the hopper or silo through the Airbrator Pad. As the air discharges in the material it provides an aeration effect to fluidise the material. The positive air pressure keeps material from getting under the boot. The air flowing under the boot causes it to vibrate. The vibration of the boot helps move material that has the tendency to hang up or bridge.
When the air is removed from the boot, the pressure of the material and the design of the boot forces it against the side wall of the hopper or silo. This prevents material from getting under the boot and back into the air supply.
Installation is as simple as drilling a 22mm hole in the hopper wall and inserting the Airbrator from the inside and tightening the rear nut. An air supply is connected and timing sequence initiated. For larger hoppers or silos, multiple rows or Airbrators may be required.
The Airbrator is manufactured from food grade materials with a stainless steel stem and is rated to 121°C.