Ring Dryers
Feed-Type Ring Dryer
Provides selective residence time and is capable of large evaporative capacities with reduced footprint.
The manifold, which is often used in combination with a pre-separator, 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 blade is used to cut this layer and return the heavier, semi-dried material back to the disintegrator which dispersers the feed material into 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. The combination of this manifold and disintegrator aids control of particle size, product moisture and exhaust temperature.
This selective extension of residence time enables the Feed-Type 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 Feed-Type Ring Dryer has been used to dry products in many industries including agrifood, chemical and mineral. 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.
Features
- Cold disintegrator with single stage manifold
- Choice of a buffer hopper or back-mixing system if required
- Can incorporate a pre-separator to collect the bulk of the material before the cyclones
- Large evaporative capacities
- Can be designed for open circuit and partial gas recycle
- Can be designed for operation in an inert atmosphere
Benefits
- The disintegrator breaks lumps and disperser the wet feed and the manifold uses centrifugal forces to promote the recycling of heavier wetter material to the dryer feed point while allowing dry light product to be collected. This combination reduces the exhaust temperature and increases the thermal efficiency of the system while ensuring product quality
- Flexibility to work with different dewatering systems and to enable use with friable and non-friable wet feeds
- Improves cyclone collection efficiency and emissions. Especially suited for fibrous and feed products.
- Improves plant simplicity and capital investment
- Enables energy savings and system integration
- Suitable for operation with solvent and recovery thereof.
Process Flow Diagram
Feed-Type Ring Dryer
Related Products
Flash Dryer
The GEA Flash Dryer is a pneumatic system primarily used to dry products requiring the removal of free moisture. Drying takes place in a matter of seconds.
Ring Dryer
Almost any product requiring a powdered product can be dried in a Ring Dryer, which can handle a broad range of feed materials including powders, cakes, granules, flakes, pastes, gels, and slurries in addition to viscous products such as vital wheat gluten (VWG) which utilize a a proprietary feed extrusion system.
SWIRL FLUIDIZER®
Dry pastes, filter cakes and viscous slurries more cost-effectively with the SWIRL FLUIDIZER®
P-Type Ring Dryer
In addition to improving the thermal efficiency of the system, the use of the P-Type manifold in recycling the solids to a cooler section of the system, also minimizes the risk of thermal degradation. As a result the P-Type Ring Dryer is well suited to use with thermally sensitive materials including modified starches and soy fibre.
