Working principle of spray dryer

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 nozzle size of the material liquid pump can be adjusted 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, allowing it to come into contact with hot air and be dried. Used for drying some heat sensitive liquids, suspensions, and viscous liquids, as well as for drying fuels, intermediates, soap powder, 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 range and operation process of spray dryer are introduced in detail.

Spray dryer is a kind of continuous atmospheric pressure dryer. Spray the liquid material into a mist using special equipment, allowing it to come into contact with hot air and be dried. Used for drying some heat sensitive liquids, suspensions, and viscous liquids, such as milk, eggs, tannins, and drugs. It is also used for drying fuels, intermediates, soap powder, and inorganic salts.

The air is filtered and heated, entering the top air distributor of the dryer, and the hot air enters the drying chamber in a spiral and uniform manner. The feed liquid passes through the high-speed centrifugal atomizer on the top of the tower body, and (rotating) spray into extremely fine mist like liquid beads, which can be dried into finished products in a very short time in parallel 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 discharged by the induced draft fan.