The spray dryer is a device that can complete drying and granulation at the same time. According to the process requirements, the pressure, flow rate, and size of the nozzle hole of the feed liquid pump can be adjusted to obtain the required spherical particles in a certain size ratio.
The spray dryer is a type of continuous atmospheric dryer. The liquid material is sprayed into mist with special equipment to make it contact with hot air and be dried. Used to dry some heat sensitive liquids, suspensions and viscous liquids, such as milk, eggs, tannins and medicines. It is also used for drying fuels, intermediates, soap powder and inorganic salts.
The spray dryer is a type of continuous atmospheric dryer. The liquid material is sprayed into mist with special equipment to make it contact with hot air and be dried. Used to dry some heat sensitive liquids, suspensions and viscous liquids, such as milk, eggs, tannins and medicines. It is also used for drying fuels, intermediates, soap powder and inorganic salts.
Working Principle
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 on 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 waste gas is evacuated by the induced draft fan.
Features
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. The production process is simplified and the operation and control are convenient. For liquids with a moisture content of 40-60% (up to 90% for special materials), they 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.
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