Spray Drying - Atomizers

• Process Principles                  Back to GEA NIRO
• Spray Drying Systems
• Atomizers
• Industrial Production

Three types of atomizers are used in industrial drying:

• Rotary - Atomization by centrifugal energy
• Pressure nozzle - Atomization by pressure energy
• Two-fluid nozzle - Atomization by kinetic energy

The choice of atomizer depends upon the properties of the feed and the dried product specification. In cases where more than one atomizer type is suitable, the rotary atomizer is generally preferred due to its greater flexibility and ease of operation. The advantages include:

Handling of high feed rates without need for atomizer duplication Handling of abrasive feeds No blockage problems Low pressure feed system Ease of droplet size control through wheel speed adjustment

NIRO offers a range of rotary atomizers, including the world's largest, covering feed rates up to 200 t/h and power requirements up to 800 kW.