Air Dispersion Dryers

From SolidsWiki
Revision as of 07:24, 24 July 2012 by Helal (talk | contribs)
Jump to navigation Jump to search


The Air Dispersion Dryers are used for drying applications of wet cakes, pastes, sludges and production of powders from aqueous suspension. Due to the dewatering mechanism, these dryers provide effective solutions and converted to either filter cakes, pastes or sludges. These air dispersion dryers are chosen on the basis of wet deed cake particle size distribution of final powder and drying curve. Our range of air dispersion dryers includes spray dryers, rotary dryers, flash dryers, spin flash dryers, vibrated fluid bed dryers and fluid bed dryer.

Features

  • Smooth functionality
  • Easy operation
  • Durable performance

Spin Flash Dryers

If the wet cake is a paste or sludge, swirl flash dryer is the most suited for drying application. The dryer is fitted with a mechanical agitator which helps to disperse the wet cake without any need for back mixing of the dry powder. the feeding system includes a feed tank with agitator and a screw feeder for feeding into the drying unit. The heart of drying process is cylindrical drying chamber, where the drying air enters the air distributor. The tangential air distributor of special design introduces the air as an intense swirl flow. the simple spin flash dryer is designed to handle materials that can be suspended directly in air. The drying process usually is completed in 0. 5 - 2 sees, and the final moisture is generally in the constant rate drying zone. Various types of spin flash dryers designs are available based on uniform / non uniform particle size of the feed / product. the feeding of cake is through specially designed paddle mixer / screw conveyor with / without rotary injector depending on rheology of feed material. For difficult to handle feed materials part of dried powder can be re-cycled. Spin flash dryers are suited for filter cakes, semi dried powders.

Rotary Dryers

Rotary dyers that are classified as direct or indirect (air heating method), current or counter current (material air contact). While using the dryers the material should be dried and uniformly dispersed over the entire cross-section. These dyers can also be customized based on the properties of the material.

Features

  • Material is Passage through heated air
  • Dryer is driven through a girth gear and tyre arrangement
  • Minimum air leakage

Advantages

  • Low operating costs* Low maintenance costs
  • Ideally suited for high volumes
  • High thermal efficiency

These dryers are used to handle following material

  • Sand
  • Clays
  • Maize germs
  • Coal
  • Ore
  • Industrial sludge

Fluid Bed Dryers

Fluid Bed Dryers are known for single stage operation and extensively used to convert solutions, suspensions, and slurries into dry powder within a few seconds without any intermediate handling. The high speed of the process and controlled temperature ensure the optimum efficiency of the process.

Feature

Easy to install High functionality Optimum performance Smooth operation