Spray dryers equipped with a rotary atomizer are widely used in liquid shaping and in fine powder technology. Our process technologies are well developed and recognized worldwide.

GEA Niro rotary atomizers have been serving industries around the world and are renowned for their reliable performance giving customers the benefits of maximum availability, superior product quality and the highest yields. We supply rotary atomizers for all industries.

Features and benefits:

  • Because the break-up energy is supplied by the motor-driven wheel, the liquid feed system can operate at relatively low pressure
  • Able to handle applications where clogging would be a problem for nozzles
  • Particle size can be changed by changing the wheel speed
  • A wide range of wheels in different designs and sizes for non-abrasive and abrasive feeds
  • Different wheel designs give different powder characteristics
  • Meeting the standards, the atomizer is designed and constructed according to the requirements of the process plant and industry
  • The demands of the pharmaceutical, cosmetic and food industry on hygiene and surface quality is taken into account by various measures
  • Flexibility as to through-put
  • Ability to handle large quantities of non-abrasive or abrasive feeds
  • Ability to handle highly viscous concentrates
  • Ability to handle products with crystals
  • Higher solids content in the feed is possible, therefore better economy

Rotary atomizer from GEA Niro
Rotary atomizer from GEA Niro
Droplets of atomized liquid
The pattern of the droplets of atomized liquid depends upon several factors such as liquid properties, wheel speed, wheel configuration, etc. Bulk density of the liquid is also one of the factors for spray dried products. Different atomizer wheel configurations, optimum atomizer speed and relevant feed properties yield desired results.

 

 

Atomizer wheel
With high liquid feed flow at high wheel peripheral speeds, liquid disintegration occurs right at the wheel edge by frictional effects between the air and the liquid surface. The liquid emerges as a thin film from the channel or orifice of a wheel. To obtain optimum droplet size uniformity for a given feed rate, incorporation of the following conditions is essential for wheels:

  • Vibration-less rotation
  • High peripheral speeds
  • Smooth internal surfaces
  • Uniform liquid feed rates
  • Complete wetting of the internal surface
  • Uniform distribution of feed