GRANULATION METHOD IN A PSEUDO-LIQUIDED LAYER AND AN APPROPRIATE GRANULATOR

摘要

A fluid bed granulation process of a substance involves cooling of the granules obtained from granulation fluid bed (F1) in a second fluid bed (F2) with a same flow of fluidizing air. The flow of the air forms and supports the fluid beds continuously, such that the beds are in series with respect to the flow. An independent claim is included for an apparatus to carry out the above fluid bed granulation method, comprising a self-supporting container with a granulation space inside it and a shelf in it, where the shelf supports (F1); a base plate below and at a predetermined distance from the shelf, where the base plate supports a respective (F2); a downcomer extending vertically in the space for the transfer of the finished granules from (F1) to (F2); and systems for feeding and distributing the fluidizing air in the space below the base plate, where the systems form and maintain (F2) and (F1) in a series with respect to the flow. Further, (F2) is in fluid communication with (F1) through the shelf. The shelf is perforated, grated or permeable to gas flows.