There are many types of drying equipment and a wide range of applications. It can be said that all aspects of life have the shadow of dryers, especially in industrial production, it is inseparable from the existence of dryers. How specific dryers are used in industry, that is, dryers are used in industrial production. The role and use of the spray dryer as an example.
According to the structure of the atomizer, the drying equipment is divided into three types: centrifugal spray drying equipment, pressure spray drying equipment, and airflow spray drying equipment. Spray drying equipment is suitable for drying solutions, suspensions or slurry-like materials, especially Drying of highly heat-sensitive materials and materials that are easy to disperse during the concentration process of the material liquid. It uses the spray method to turn the materials into mist droplets and disperse them in the hot air. The materials and the hot air contact each other in parallel flow, countercurrent or mixed flow, so that the moisture can quickly evaporate and achieve the purpose of drying.
Spray drying is a method in which system technology is applied to material drying. After the diluent is atomized in the drying chamber, in the contact with the hot air, the water evaporates quickly to obtain a dry product. This method can directly dry the solution and emulsion into powder or granular products, thereby eliminating the need for evaporation and pulverization.
Because of its special advantage that spray drying equipment can directly use solutions or suspensions to make powdered products with uniform ingredients, it has been widely used in chemical, light industry, food and other industrial production.
Polymers: Acrylonitrile-butadiene resin, melamine-formaldehyde resin, polyoxymethylene, polyacrylonitrile, polycarbonate, polyethylene, polyvinyl alcohol, polypropylene, polystyrene, polyaldehyde, etc.
Catalysts: acrylonitrile catalyst, light oil conversion catalyst, high-pressure methanol catalyst and low-pressure methanol catalyst, etc.
Dyes and pigments: basic dyes, reactive turquoise blue, khaki green B, chrome yellow, phthalocyanine, titanium dioxide, zinc chromate, potassium zinc chromate, zinc tetraoxide chromate, watercolor, brighteners, etc.
Rust removers, fungicides, insecticides: calcium arsenate, sodium-aluminum-fluoride, vulcanized colloids, herbicides, insecticides, fungicides, etc.
Surfactants: alkyl-mimidic acid salt, fatty alcohol sulfate, phosphate, saponin, soap, synthetic washing powder, sodium lauryl sulfate and soap base, etc.
Mineral products: copper concentrate, nickel concentrate, platinum concentrate, precipitated copper, precious metal mud, cryolite, kaolin and phosphate, etc.
Spray drying equipment can also dry many kinds of organic and inorganic compounds.
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