The pneumatic system used to drive off free moisture in seconds.

Flash Dryer

Elevated drying temperatures can be used with many products since the flashing off of surface moisture instantly cools the drying gas without appreciably increasing the product temperature which may damage its quality.

Flash dryer

Flash Drying Process

Wet material is dispersed into a stream of heated air (or gas) which conveys it through a drying duct. Using the heat from the airstream, the material dries as it is conveyed. Product is separated using cyclones, and/or bag filters. Typically, cyclones are followed by scrubbers or bag filters for final cleaning of the exhaust gases to meet current emission requirements. 

For even greater thermal efficiency and where inertization is required, recycling of exhaust gases can be used. This partial gas recycle (PGR) configuration can be implemented on all our airstream drying systems as well as retrofitted on customer's existing drying operations. 

Flash dryers have been used to dry products in many industries including agrifood, chemical, 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, backmixing of the wet feed with a portion of dry product to produce a suitable conditioned material is required.

Pneumatic Cooler Conveyor

Pneumatic coolers are a simple and reliable method of cooling and conveying dried product. In many instances ambient air will achieve the desired cooling duty. Where required, greater cooling capacity and a finer degree of control can be achieved with conditioned air at a controlled humidity and temperature.

Features

  • Short residence time
  • A buffer hopper or back-mixing system if required
  • Can be designed for open circuit or partial gas recycle
  • Can be designed for operation in an inert atmosphere
  • Simple system with few moving parts

Benefits

  • Promotes product quality
  • Flexibility to work with different dewatering systems and to enable use with friable and non-friable wet feeds
  • Enables energy savings and system integration
  • Suitable for operation with solvent and recovery thereof
  • Cost effective and reliable with low maintenance and cleaning requirements - good for regular grade changes

Process Flow Diagram

Flash drying process diagram

GEA Insights

A bowl of pasta with cultivated meat

GEA brings alternative protein expertise to U.S.

A new GEA technology center for developing alternatives to meat, dairy, seafood and eggs in Wisconsin, will help accelerate novel food production in the U.S. market

Future-proofing the cold chain with sustainable refrigeration

The importance of quality cold chain management cannot be underestimated. Ensuring that perishable foodstuffs are safe and of high quality at the point of consumption is a tremendous responsibility for those operating cold chain...

GEA supports clean water projects in Tanzania

Access to safe water and sanitation is still a challenge in a lot of countries. Illness from dirty drinking water and daily treks to fetch it, mean many children cannot attend school. Thanks to a collaboration with Hamburg-based...

Receive news from GEA

Stay in touch with GEA innovations and stories by signing up for news from GEA.

Contact us

We are here to help! With just a few details we will be able to respond to your inquiry.