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Advantages of Air Stream Spray Drying Machine and spray drying process
Aug 09, 2018

Spray drying itself is the most widely used process in the liquid process forming and drying industry and is suitable for the production of powdered, granulated or lumpy solid products from solutions, emulsions, suspensions and plastic paste liquid materials. Therefore, when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product must meet the exact standards, the Air Stream Spray Drying Machine is therefore favored by users.


The air is filtered and heated to enter the air distributor at the top of the airflow spray 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 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 fan.


Compared with other drying equipment, the Air Stream Spray Drying Machine is not only highly automated, but also controls the granularity of the finished product and is flexible in operation. The Air Stream Spray Drying Machine uses a frictional force generated by a difference in speed between the gas and the liquid by ejecting compressed air or water vapor from the nozzle at a speed of ≥300 m/s, so that the liquid material is separated into fine droplets.


Due to the sufficient contact of the droplets with the hot air and heat exchange, the entire drying process is completed quickly within 10-30 seconds; due to the short drying time, the product can maintain uniform fine particles, for the grain, bulk density and water of the product. The nature of the product and product can be adjusted within a certain range to change the operating conditions, and the control and management are convenient. For paste materials with large viscosity, the paste material works very well.

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