The manifold uses the centrifugal forces created through passing a product containing airstream around a curve to concentrate the product into a moving layer. The adjustable splitter blades are used to cut this layer and return the heavier, semi-dried material back to the hot air stream at the inlet of the dryer for another pass through the system while the lighter, drier product exits the manifold and proceeds to the product collection system. Manifolds can have single or multi classification blades and are often used in combination with disintegrators for greater control of particle size, product moisture and exhaust temperature.
This selective extension of residence time enables the Ring Dryer to process many materials which were traditionally regarded as difficult to dry in a Flash Dryer. Depending on the specific application, GEA offers custom designed systems based on proven configurations and technology to provide flexibility in design and optimal performance.
The Ring Dryer has been used to dry products in many industries including food, chemical, mineral and plastics. A broad range of feed materials including powders, cakes, granules, flakes, pastes, gels, and slurries can be processed. For slurries, pastes, or sticky materials, our specifically designed feed system allows back-mixing of the wet feed with a portion of dry product to produce a suitable conditioned material for feeding into the dryer. Special extrusion systems are also used for viscous products such as vital what gluten.