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Homogeneous granules.
Gentle product handling.
Intensive mixing of the solid material.
Uniform spraying of all particles in the fluid bed.
Uniform, reproducible product quality.
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Process advantages
Fluid bed granules are very homogeneous. All particles in the powder mix are
sprayed evenly with liquid starting materials. The type of granulate (size,
density, porosity) can be influenced over a wide range by the adjustment of
various parameters.
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Principles of operation
Glatt implements this process with different capacities according to the
process requirements, starting materials and the required product
parameters.
Batch Fluid Bed Systems
with batch sizes from 20g to 1.5t/batch.
Continuous Fluid Bed Systems with
throughputs from 20kg to 5t/h.
Depending on the process requirements, the liquid starting material is
usually sprayed in from above or, in individual cases, from the bottom (Top
Spray or Bottom Spray granulation respectively).
Batch fluid bed
For Agglomeration/Granulation in batch
mode, the dry starting product is placed in the product container. Here it is
mixed vigorously in the heated gas stream, held in suspension and
agglomerated/granulated by spraying with a suitable bonding material. The
product is then dried to the required end moisture content with high heat and
material transition coefficients.
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Principle:
Batch fluid bed granulation, Top Spray |
Principle:
Batch fluid bed granulation, Bottom Spray
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Continuous fluid bed
Continuous granulators are sub-divided into several granulation zones, which
are operated at different speeds and temperatures, e.g. Agglomeration/Granulation in the first and second
sections, drying in the third and cooling at the end of the process chamber.
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Principle:
continuous fluid bed granulation in the Glatt fluid bed (GF)
Top Spray |
Principle:
continuous fluid bed granulation in the Glatt fluid bed (GF)
bottom Spray
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When granules are to be manufactured from liquid starting materials, the
particles are not agglomerated in the fluid bed but repeatedly re-coated until
the required grain size is achieved
(-> Spray Granulation).
In the batch process,
the undersized grains from the previous batch are used as the starting material.
In the continuous process, the undersized grains are continuously separated from
the product and continuously fed back into the process as germ material.
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Principle:
continuous spray granulation
in the Glatt fluid bed (GF)
Top Spray |
Principle:
continuous spray granulation
in the Glatt fluid bed
(AGT) |
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