Spray dryer is a very important and common type of drying equipment, which is widely used in industrial production. Due to its unique nature, it plays a crucial role in the drying of certain products.

Working principle of spray dryer:

The air enters the air distributor on the top of the dryer after being filtered and heated by the hot air furnace. The hot air enters the drying chamber in a spiral shape evenly. The feed liquid passes through the high-speed centrifugal atomizer on the top of the tower body, and the (rotating) spray becomes a very fine mist like liquid bead. It can be dried into finished products in a very short time when it contacts with the hot air in parallel. 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.

Features of spray dryer:

1. 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 in an instant, and the drying time is only a few seconds. It is particularly suitable for drying heat sensitive materials.

2. The product has good uniformity, fluidity, and solubility, high purity, and good quality.

3. The production process is simplified and the operation control is convenient. For liquids with a moisture content of 40-60% (up to 90% for special materials), they can be dried into powder products in one go without the need for crushing and screening, reducing production processes and improving product purity. The particle size, bulk density, and moisture content of the product can be adjusted within a certain range by changing the operating conditions, making control and management very convenient.