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9 - 11 April 2019 // Nuremberg, Germany

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Exhibitors & Products POWTECH 2019
Zoom product LOGO_Ring- and Flash Dryer

Ring- and Flash Dryer

LOGO_Ring- and Flash Dryer

Ring- and Flash Dryer

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Ring dryers are flash type dryers which incorporate a centrifugal classifier to increase the product residence time selectively for the wetter and larger material. Within the classifier, the drier and finer particles are separated out from the air stream to be selectively returned back into the drier for further drying.
The finer and drier material is removed from the ring dryer through the bag filter or cyclone collection system.
Adjustment blades in the classifier allow the degree of separation to be set to optimize the dryer performance.

Ring dryers can be fitted with high speed hot disintegrators (fixed beater type mill), located within the hot air stream, to provide screenless grinding.
Ring dryers thus provide extended residence times, allowing many materials to be effectively dried which would not be suitable for flash drying.

Applications:

  • gluten (wheat or corn based)
  • high protein fodder DDGS
  • minerals
  • silica
  • food ingredients
  • proteins
  • soy products


Flash dryers are used to produce fine granular or powdered material when short residence times are acceptable.
A stream of turbulent hot air dries the product in a continuous process.

A variety of wet material feeder devices are available, optimized according to product characteristics and feed quantities.
These include sling feeders (used for non-abrasive and friable materials), cold disintegrators and direct screw feeders.

The final dried material is separated from the drying air using either bag filters or cyclone technology.
Two-stage collection (e.g. cyclones plus wet scrubber) is also available where required to optimise product recovery or minimise particulate emissions to atmosphere.

Applications:

  • native and modified starch
  • Flour
  • Lignin
  • pigments (iron, copper)
  • fly ash
  • chemicals (e.g. sodium sulphate)

Your application is not on the list?
We have desired test facilities, combined with our long term experience in the drying
we would be pleased to consult for the best drying solution for your product.
Feel free to contact us or meet us at the Powtech 2019 in Nuremberg.

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