Introduction: product descriptionSpray drying is a more widely used process in the liquid process shaping and drying industry. It is especially suitable for generating powdery and granular solid products from solutions, emulsions, suspensions and pasty liquid mater…
Spray drying is a more widely used process in the liquid process shaping and drying industry. It is especially suitable for generating powdery and granular solid products from solutions, emulsions, suspensions and pasty liquid materials. Therefore, when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product must meet high standards, spray drying is a better process.
After filtering and heating, the air enters the air distributor on the top of the dryer, and the hot air enters the drying chamber evenly in a spiral shape. The material liquid passes through the high-speed centrifugal atomizer at the top of the tower, and (rotating) sprays into very fine misty liquid beads, which can be dried into finished products in a very short time in co-current contact with hot air. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, and the exhaust gas is evacuated by the fan.
◎The drying speed is fast, and the surface area of the material liquid is greatly increased after atomization. In the hot air flow, 95%-98% of the water can be evaporated instantly, and the drying time is only a few seconds. It is especially suitable for the drying of heat-sensitive materials.
◎The product has good uniformity, fluidity and solubility, high purity and good quality.
◎Simplified production process and convenient operation and control. For liquids with a moisture content of 40-60% (up to 90% for special materials), it can be dried into powder products at one time, without crushing and screening after drying, reducing production procedures and improving product purity. The product particle size, bulk density and water content can be adjusted by changing the operating conditions within a certain range, and the control and management are very convenient.
Adapt to materials
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, urinary formaldehyde resin, phenolic resin, dense rubber (urea) formaldehyde resin, polyethylene, polyvinyl chloride, etc.
Food industry: fat-rich milk powder, gluten, cocoa milk powder, milk replacer powder, blood hunting powder, egg white (yellow), etc.
Food and plants: oats, chicken juice, coffee, instant tea, flavored meat, protein, soybean, peanut protein, hydrolysate, etc.
Sugars: corn syrup, corn starch, glucose, pectin, maltose, potassium sorbate, etc.
Ceramics: alumina, ceramic tile materials, magnesium oxide, talcum powder, etc.
|Inlet temperature||140-350 Self-control|
|Upper limit of water evaporation（kg/h）||5||25||50||150||200-2000|
|Transmission form of centrifugal spray head||Compressed air transmission||Mechanical transmission|
|Diameter of spray disc（mm）||50||120||120||150||180-240|
|Heat source||Electricity||Steam + electricity||Steam + electricity, oil, gas, hot air stove|
|Electric heating power upper limit（kw）||9||36||72||99|
|Overall dimensions (length×width×height)（m）||1.8×0.93×2.2||3×2.7×4.26||3.5×3.5×4.8||5.5×4×7||Determined according to the actual situation|
|Dry powder recycling（%）||≥95|
Note: The amount of water evaporation is related to the characteristics of the material and the temperature of the hot inlet and outlet. When the outlet temperature is 90oC, the water evaporation curve is shown in the above figure (for reference for selection). As the product is continuously updated, the relevant parameters will be changed without prior notice.
◎Name of material and liquid, physical properties: solid content (or water content), viscosity, surface tension, PH value.
◎After drying, powder capacity, allowable residual water content, particle size, and upper limit of allowable temperature.
◎Production, daily working hours.
◎Available energy: steam pressure available, electric capacity, available for coal, oil and gas.
◎Control requirements: Whether the inlet and outlet temperatures need to be controlled automatically.
◎Powder collection requirements: whether to install bag traps, and environmental requirements for exhaust emissions.
◎Other special requirements.