Fluid Bed Granulation Process
AssigneeUrea Casale S.A.
InventorGianfranco Bedetti
Life of this patent
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Abstract
Fluid bed granulation process comprising the steps of: -forming a fluid bed of seeds (S1) of a chosen substance, -feeding said fluid bed with a continuous fluid flow (L) comprising a growth liquid, -inducing and maintaining a continuous vortex (V) in said fluid bed, the vortex (V) having a substantially horizontal axis, characterized in that said fluid flow (L) is fed into predetermined first zones (Z1) of said fluid bed, said first zones (Z1) being alternated to second zones (Z2) of said fluid bed in which said fluid flow (L) is not fed.
Claims15
A fluid bed granulation process comprising the steps of:
- forming a fluid bed of seeds of a chosen substance,
- feeding said fluid bed with a continuous fluid flow comprising a growth liquid,
- inducing and maintaining a continuous vortex in said fluid bed, the vortex having a substantially horizontal axis,
- wherein said fluid flow is fed into predetermined first zones of said fluid bed, said first zones being alternated to second zones of said fluid bed in which said fluid flow is not fed.
A fluid bed granulator comprising a container substantially parallelepiped in which a fluid bed is generated, the container having a bottom permeable to a fluidification flow of air or other suitable gas, defined between two opposite long side walls and two opposite short side walls, the latter being a head wall and a discharge wall of final granulate, respectively, the granulator being characterized in that it comprises a succession of distributors provided along at least one of said long side walls at predetermined distances to each other, for feeding said fluid flow at predetermined first zones of said fluid bed, said first zones being alternated to second zones which are not fed with said fluid flow.
(canceled)
Dependencies are inferred from the claim text.