The double cone rotary vacuum dryer is widely used in production. During vacuum drying, the pressure inside the cylinder is constantly lower than atmospheric pressure. With fewer gas molecules, low gas density and low oxygen content, it can process materials prone to oxidative deterioration and reduce the risk of microbial contamination of materials. Since the temperature of water during vaporization is proportional to its vapor pressure, moisture in materials can vaporize at low temperature under vacuum, realizing low-temperature drying suitable for the production of heat-sensitive materials.
Working Principle
The equipment adopts a double‑cone rotating tank. Under vacuum conditions, heat transfer oil, hot water or steam is fed into the jacket for heating. Water vapor evaporated from heated wet materials is extracted by a vacuum pump through the vacuum exhaust pipe.
The tank is kept under vacuum. Rotation of the tank continuously turns materials up and down, inside and outside, accelerating drying speed and achieving uniform drying.
Technical Parameters
Product Features
The machine is rationally designed with simple internal structure, easy cleaning and complete material discharge for simple operation. It reduces labor intensity and improves working environment. As materials rotate along with the vessel and no material accumulates on the vessel wall, it delivers a high heat transfer coefficient and fast drying rate. It saves energy and produces evenly and fully dried high-quality materials.
● Automatic constant temperature control for oil heating; applicable for drying biochemical products.
● For mineral raw materials, temperature can be adjusted within 20～160°C.
● High thermal efficiency, over twice higher than ordinary ovens.
● Indirect heating ensures no contamination of materials.
● Simple equipment maintenance, operation and cleaning.
● Optional solvent recovery process configuration as recommended.
Product Applications
Suitable for vacuum drying and mixing of powder and granular materials:
● Food industry: Whole milk powder, casein, cocoa milk powder, milk substitute powder, egg white (yolk), oats, chicken extract, instant tea, seasoned meat spices, protein, soybean protein, peanut protein, protein hydrolysate, corn steep liquor, corn starch, glucose, pectin, maltose, potassium sorbate, pumpkin powder, etc.
● Pharmaceuticals: Chinese herbal extracts, medicinal gel, yeast, vitamins, antibiotics, amylase, lipase, etc.
● Plastic resins: AB, ABS emulsion, urea-formaldehyde resin, phenolic resin, melamine formaldehyde resin, polyethylene, polyvinyl chloride, etc.
● Detergents: Laundry powder, soap powder, soda powder, emulsifier, brightener, phosphate agent, etc.
● Chemical industry: Sodium (potassium) fluoride, basic dyestuff pigments, dye intermediates, Mn₃O₄, formaldehyde silicic acid, catalysts, sulfate agents, amino acids, white carbon black, etc.
● Ceramics: Alumina, tile raw materials, magnesium oxide, talc, etc.