Working principle of flash dryer

Flash dryer is a new type of continuous drying equipment that integrates drying, crushing, and screening. The flash dryer is particularly suitable for drying filter cake like, paste like, and slurry like materials.

It is composed of a heater, feeder, mixing and crushing system, classifier, drying main pipe, cyclone separator, bag dust collector, fan, etc. Suitable for paste like, mud like, filter cake like materials, plate and frame pressure filtration or centrifuge dewatering materials. For example, inorganic materials include boric acid, calcium carbonate, hydroxide, copper sulfate, iron oxide, barium carbonate, antimony trioxide, various metal hydroxides, various heavy metal salts, synthetic cryolite, etc; Organic compounds: atrazine (pesticide insecticide), lauric acid, benzoic acid, benzoic acid, fungicide, sodium oxalate, cellulose acetate, etc; Ceramics: kaolin, silicon trioxide, clay, etc; Dyes: Anthraquinone, black iron oxide, indigo pigment, butyric acid, titanium hydroxide, zinc sulfide, various intermediate azo dyes. Food category: soy protein, gelatinous starch, distiller's grains, wheat sugar, wheat starch, etc.

The hot air tangent enters the bottom of the dryer, forming a strong rotating wind field driven by the mixer. The paste like material enters the dryer through a spiral feeder. Under the strong action of the high-speed rotating stirring paddle, the material is dispersed under impact, friction, and shear stress. The block like material is quickly crushed, fully in contact with hot air, heated, and dried. The dehydrated dry material rises with the hot air flow, and the grading ring intercepts the large particles. The small particles are discharged from the center of the ring outside the dryer and recycled by the cyclone separator and dust collector. The partially dried or large materials are thrown towards the wall by centrifugal force, and then fall back to the bottom for crushing and drying.