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Spray drying is a widely used process in the liquid process forming and drying industry. It is suitable for producing powdery and granular solid products from solutions, emulsions, suspensions and paste liquid raw materials. Therefore, spray drying is a better process when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product must meet certain standards.
The air is filtered and heated and enters the air distributor at the top of the dryer. The hot air enters the drying chamber in a spiral shape evenly. The liquid material passes through the high-speed centrifugal atomizer at the top of the tower and is (rotated) sprayed into extremely fine mist-like droplets, which can be dried into finished products in a very short time when contacted with hot air in parallel flow. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, and the waste gas is exhausted by the fan.
The drying speed is fast. The surface area of the liquid material
is greatly increased after atomization. In the hot air flow,
95%-98% of the water can be evaporated in an instant. It only takes
a few seconds to complete the drying. It is especially suitable for
drying heat-sensitive materials.
◎The product has good uniformity, fluidity and solubility, and the
product has high purity and good quality.
◎The production process is simplified and the operation and control
are convenient. Liquids with a moisture content of 40-60% (up to
90% for special materials) can be dried into powder products at one
time. There is no need to crush and screen after drying, which
reduces the production process and improves product purity. The
product particle size, bulk density, and moisture content can be
adjusted within a certain range by changing operating conditions,
and control and management are very convenient.
Chemical industry: sodium fluoride (potassium), basic dyes and
pigments, dye intermediates, compound fertilizers, formaldehyde
silicic acid, catalysts, sulfuric acid agents, amino acids, white
carbon black, etc.
Plastic resin: AB, ABS emulsion, urea-formaldehyde resin, phenolic
resin, sealant (urea) formaldehyde resin, polyethylene, polyvinyl
chloride, etc.
Food industry: fat-rich milk powder, protein, cocoa milk powder,
milk replacer powder, blood hunting powder, egg white (yellow),
etc.
Food and plants: oats, chicken juice, coffee, instant tea, spiced
meat, protein, soybeans, peanut protein, hydrolysates, etc.
Sugars: corn steep liquor, corn starch, glucose, pectin, maltose,
potassium sorbate, etc.
Ceramics: alumina, ceramic tile materials, magnesium oxide, talcum
powder, etc.