Working Principle
Hot air enters tangentially into the bottom of the dryer and forms a powerful rotating airflow field driven by the agitator. Paste materials are fed into the dryer through a screw feeder. Under the intense action of high-speed rotating stirring impellers, materials are dispersed by impact, friction and shear force. Lumpy materials are rapidly crushed and fully contacted, heated and dried by hot air. Dehydrated dry materials rise with the hot gas stream. The classification ring retains large particles, while small particles exit the dryer through the center of the ring and are recovered by cyclone separators and dust collectors. Partially dried or large lumps are thrown toward the chamber wall by centrifugal force, fall back to the bottom, and are re-crushed and dried.



Technical Parameters

Product Features
The spin flash dryer features high thermal efficiency, short drying time and remarkable energy-saving performance. Paste and cake materials can be directly dried into powder products, eliminating pre-drying pretreatment as well as post-drying crushing and screening processes. Thanks to fast drying speed and short heating duration, material components are barely damaged, making it especially suitable for heat-sensitive materials. The fully enclosed drying process prevents impurity ingress to guarantee high product quality and a favorable working environment. Multiple models have been developed for different materials to form a complete product series, which is increasingly widely applied in chemical, pharmaceutical, light industry, food, mineral and other industries.

● Organic integration of swirling flow, fluidization, spouted bed, crushing and classification technologies.
● High drying intensity, low energy consumption and high thermal efficiency.
● Compact and small-sized equipment with high production efficiency for continuous operation, realizing "large output with compact unit".
● Short material residence time and superior product quality; applicable for drying heat-sensitive materials.
● Operated under negative or slight negative pressure with good tightness and high efficiency to reduce environmental pollution.

Product Applications
The spin flash dryer is suitable for pastes, slurries, filter cakes and materials dewatered by plate-and-frame filter presses or centrifuges. Examples are listed below:

● Organic substances: Acetoguanamine, barium laurate, cadmium laurate, benzoguanamine, benzoic acid, calcium stearate, cellulose acetate, lead acetate, diphenylguanidine, lignin, polyvinyl acetate, polyvinyl chloride, sodium oxalate, carbon black, water repellent powder, rhodamine, bromamine acid, DSD acid, J acid, dibasic acid, carboxymethyl cellulose, etc.

● Inorganic substances: Aluminum hydroxide, lead phosphate, aluminum phosphate, zinc phosphate, aluminum silicate, silica gel, barium carbonate, calcium carbonate, manganese carbonate, nickel carbonate, potassium carbonate, strontium carbonate, carbon powder, copper sulfate, lead sulfate, manganese sulfate, barium sulfate, sodium thiosulfate, tribasic sodium sulfate, lime, antimony trioxide, antimony pentoxide, chromium dioxide, manganese dioxide, manganese oxide, iron oxide, iron disulfide, ammonium polyvanadate, bismuth plumbate, borax, boric acid, white carbon, cryolite, dolomite, jarosite, potassium nitrate, silver halide, sodium antimonate, sodium fluorosilicate, zeolite, titanium dioxide.

● Pigments and dyestuffs: Anthraquinone, aminoanthraquinone, H acid, T acid, monoazo dyes, disazo dyes, trisazo dyes, fluorescent yellow S, indigo pigment, iron oxide black, iron oxide red, iron oxide yellow, chrome orange, direct black, zinc chromate, lead chromate, lithopone, nitro dyes, nitroso dyes, black iron oxide, butyric acid, titanium hydroxide, zinc sulfide, strontium chromate, titanium dioxide, ultramarine, zinc sulfide, reactive brilliant red X‑3B, acid mordant black T, reactive brilliant blue KN-R, phthalocyanine blue, phthalocyanine green, copper phthalocyanine, lemon yellow, lithol rubine, cationic brilliant blue RL, various azo dye intermediates.

● Pharmaceuticals: Aminopyrine, 4-aminobenzoic acid, methyl 4-aminobenzoate, bismuth plumbate, chloramphenicol intermediates.

● Pesticides: Atrazine, Bordeaux mixture, folpet, herbicides, cartap, fentin acetate.

● Ceramics: Alumina, clay, kaolin, silica, zirconium silicate.

● Food: Blood meal, bran, distiller's grains, lactose, soy protein, gelling starch, wheat sugar, wheat starch, wheat, glucose, corn oil residue, red bean paste.

● Waste materials: Biological sludge, iron‑manganese slag, manganese-containing residues, furfural residue.