Characteristics and operating principle of centrifugal spray dryer

- Jul 01, 2019-

The centrifugal spray dryer mainly uses the high-speed rotating force of the rotary atomizer to remove the mist droplets, and is also dried by hot air to become powder or particles. The drying speed is fast, the surface area of the liquid is greatly increased after atomization, and in the hot air flow, 95%-98% of the water can be evaporated instantaneously, and the drying time is only a few seconds, which is especially suitable for drying the heat sensitive material.


The dried products of the centrifugal spray dryer have good uniformity, fluidity and solubility, and the product has high purity and good quality. The production process is simplified, and the operation and control are convenient; for the liquid with 40-60% moisture content, it can be dried into a powder product at one time, without pulverization and screening after drying, the production process is reduced, and the purity of the product is improved. The particle size, bulk density and moisture of the product can be adjusted within a certain range by changing the operating conditions.


The air is filtered and heated into the air distributor at the top of the dryer, and the hot air enters the drying chamber in a spiral shape evenly. The liquid is sprayed into a very fine misty liquid droplet through a high-speed centrifugal atomizer at the top of the tower body, and it can be dried into a finished product in a short time by cocurrent contact with hot air. The finished product is continuously discharged from the bottom of the drying tower and the cyclone, and the exhaust gas is evacuated by the induced draft