Glatt Ingenieurtechnik GmbH

Agglomeration in the fluid bed has been used for a long time to form granules from a powder. The fluidized powder is wetted until liquid bridges are formed between the particles. Water, solutions, suspensions or melts can be sprayed to meet the desired product quality. Using this technology the amount of dust is decreased, the flowability and the dispersability in water are improved.
Segregation of powder mixtures do not occur since the different powders are glued together on a micro-scale.  Since the impinging forces in the fluid bed are small, weak granules are formed with an excellent solubility (instant products). Spraying more binding liquid results in stronger granules. The agglomeration process can also be used as an immobilization process for liquids. A powdery adsorbent is used as a carrier and saturated with the liquid. The product is a liquid integrated into a dry, free flowing agglomerate. This process is also called encapsulation.

Segregation of powder mixtures do not occur since the different powders are glued together on a micro-scale.  Since the impinging forces in the fluid bed are small, weak granules are formed with an excellent solubility (instant products). Spraying more binding liquid results in stronger granules. The agglomeration process can also be used as an immobilization process for liquids. A powdery adsorbent is used as a carrier and saturated with the liquid. The product is a liquid integrated into a dry, free flowing agglomerate. This process is also called encapsulation.
Powder is charged into the processing chamber of the fluid bed granulator. In the first process step the fluidized powder is wetted until agglomeration occurs. As soon as the desired grain size is reached, spraying is stopped and the granules are dried. Frequently the product is cooled before discharge.
The different steps - in the batch process separated by time - are separated by space in the Glatt Fluid Bed Granulator GFG. Powder is fed continuously into the processing chamber. In the first part of the chamber liquid is sprayed into the bed and the powder is agglomerated. The wet granules are dried and cooled in the following parts of the processing chamber. The different processes are determined by different process air qualities in different inlet air chambers. If necessary the processing chamber can be separated into zones by weirs.