Spray dryer is a kind of equipment that can complete drying and granulation together. According to the process requirements, the spray dryer can adjust the pressure and flow of the feed liquid pump and the size of the orifice to obtain the required spherical particles in a certain proportion of size. Spray dryer is a kind of continuous atmospheric pressure dryer. Spray the liquid material into a mist using special equipment, and dry it by touching it with hot air. Used for drying some heat sensitive liquids, suspensions, and viscous liquids, as well as for drying fuels, intermediates, soap powders, and inorganic salts. Generally, it includes electric blast drying oven, vacuum drying oven, high-speed centrifugal spray dryer and sterile spray dryer. The working principle, basic classification, characteristics, technical parameters, application scale and operation process of spray dryer are introduced in detail.

After filtering and heating, the air enters the top air distributor of the dryer, and the hot air enters the drying chamber uniformly in a spiral shape. The feed liquid passes through the high-speed centrifugal atomizer on the top of the tower body, and the spray becomes a very fine mist like liquid bead, which can be dried into products in a very short time by flowing with hot air. The products are continuously output from the bottom of the drying tower and the cyclone separator, and the exhaust gas is discharged by the induced draft fan.

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