Vertex – Cooling System ENG

Special Features

vertex – Cooling System for Spray Towers

During the spray drying process the air in the gas-heated air heater can get extremely hot because of the stored heat if the fresh air supply to the gas-heated air heater is missing or in case of an emergency stop or a power failure (the supply air fan is turned off).

Surface temperatures of 500‒550 °C can be expected on the process air side of the gas-heated air heater.The hot air can rise in the plant. In a worst case scenario, the hot air rises against the flow direction of the process air and into the supply air duct, and should the occasion arise even with powder particles and therefore cause an overheating of the drying chamber.

This in turn can cause a fire or in worst case cause an explosion of the powder in the drying chamber, not to mention the sensorial effects on the product.
To avoid an inlet of overheated air to the drying chamber when starting or restarting and therefore to counteract an overheating, Bilfinger GreyLogix foodtec developed the spray tower cooling system vertex. vertex can independently of the mains voltage avoid an overheating of the intake air of the drying chamber and can cool the drying chamber in a controlled manner.
The basic principle is based on evaporative cooling, which is achieved by a fine spray of water into the air intake duct of the drying chamber. The energy removed from the hot air through this process reduces the air’s temperature to a non-critical value – without damaging the powder present in the drying.

Special Features

  • compact and easy to maintain
  • compatible with GreyLogix extinguishing system
  • UPS standard
  • fully-automated processing


  • standard control cabinet with front entrance (600 x 600 x 210 (mm))
  • compact, easy to maintain setup
  • direct integration into GreyLogix extinguishing system
  • open interface system (Ethernet, Profinet, Profibus, 4..20 mA standard)
  • profinet connection as standard interface
  • UPS system standard
  • independent of a failure of operating media
  • automated processing (automated emptying and filling after release)