The GEA Niro NOZZLE TOWER™ spray dryer is designed to produce a free flowing, dustless powder consisting of hard, big, single particles. Atomization is done by nozzles typically mounted in the air disperser at the top of the spray drying chamber. This gives a co-current parallel air/particle flow down through the drying chamber and results in a gentle, slow drying.

Fines carried off with the drying air is separated in either cyclones, bag filters or a combination of the two, all depending on local demands for environmental protection. The fines fraction can be reprocessed. For certain products, an after-dryer such as the GEA Niro VIBRO-FLUIDIZER™ can be added directly at the discharge point of the main fraction from the spray drying chamber in order to improve the drying economy and increase the capacity.

All flowsheet animations are available in the GEA Niro download area.

Powder from a GEA Niro NOZZLE TOWER™ <br>Particle size: 100-500 my
Powder from a GEA Niro NOZZLE TOWER™
Particle size: 100-500 my
The GEA Niro NOZZLE TOWER™ is also available in a counter-current version with fountain nozzles for heavy feed stocks such as ceramics, metal powders and silica.

The GEA Niro NOZZLE TOWER™ is a very flexible and cost efficient solution. It is designed to meet customers’ and local authorities’ requirements. Therefore, it is available as:

  • Plants with highly effective filters and/or scrubbers to ensure emission of clean exhaust process air
  • Semi closed plants utilizing low oxygen combustion gas as process air
  • Semi closed plants, self-inertised and featuring incineration of the exhaust air
  • Closed cycle concept with nitrogen purged process gas circuit

Safety aspects
All GEA Niro spray drying plants comply with the strictest requirements for health, safety and environmental compliance. GEA Process Engineering’s expertise in explosion control design is unequaled and an invaluable aid whether considering ATEX, other European safety directives or local regulations. All plants designed and supplied by GEA Process Engineering will enable the end user to obtain approvals put forward by the EU directive.