From Drops to Powder –
From a Suspension to a Granulate
Innovative Processing of Fluids in Fluidised Bed Dryers
Turn suspension and pastes into ...
Exhaust air
ALLGAIER fluidised bed dryers are
the solution to even the most
difficult problems in the processing
of liquids for the production of
granulates and powders. Several
processing stages can be combined
into one single process step:
- concentration of liquids
- shaping by granulation or
agglomeration
- subsequent drying
- classification and dust removal
The simple operation of the fluidised
bed dryers and their economical production method offer new possibilities
for achieving higher-quality products.
Liquid
Liquid
Fluidised beds provide ideal conditions
for the optimum of head and mass
transfer. This results in high energy
densities which require only low plant
volumes.
Fluidised beds have a very uniform
temperature profile and are thus also
suitable for handling products which
are sensible to high temperatures.
Drying air
Classifying air
Granulate
… high-quality powders or granulates.
With the ALLGAIER fluidised bed
dryers, liquids can be processed to
form granulates or powders.
Typical examples are:
- salt solutions
- pigment suspensions
- sodium nitrate solution
- sodium sulfates
- organic acids
- leakage water from garbage
dumps
- fertiliser suspensions
- detergent concentrates
- potash solution
- waste water from synthetic resins
- sorbitol
- dextrose and glucose
- ferrites
- cereal slops
- milk and whey
- gelatine
- yeast suspension
- starch slurry
- mixtures of mineral
compounds
- liquid manure
- enzyme solution
- flue-gas washing water
- waste water from chemical or
pharmaceutical processes
- instant beverages
- animal food mixtures
Granulation dryers:
From fluid to granulate.
During granulation, the fluid containing solid materials is injected
through nozzles into the fluidised
bed, where it comes into contact with
the fluidised solid particles. The heat
entering the dryer with the drying
air vaporises the water or the solvent
contained in the fluid, causing the
solid material to be deposited on the
granulate nuclei. This result in solid
grown granulates by layered growth
which are often of very good flowability. Once the granulates have
reached the desired size, they drop
through the classification tube and are
removed from the dryer.
Exhaust Air
Granulation
dryer
Dust
Suspension
Pump
Air
Air heater
Crushing
Cooling
Screening Machine
Procuct
Reliable production of defined grain sizes.
The ALLGAIER method is characterised
by its high stability with respect to
variations of the solid concentration in
the feed and to variations in the feed
capacity. Modern dosing devices permit
precise compliance with defined
formulas.
The possibility of operating the granulation dryer in a closed circuit with superheated steam or solvent vapour results
in a process free of exhaust air which
is particularly suitable for the handling
of toxic materials or for the treatment of
dangerous waste materials.
Our fluidised bed dryers can also be
used for the continous agglomeration
of powders or dusts to form easily
soluble instant products such as instant
coffee or tea.
We will gladly test the granulation
abilities of your new products in our
technical testing centre.
Suspension and paste dryers:
from fluids to powders.
Suspensions, solutions, difficult
pastes or solid filter cakes can be
homogenised, dried and converted
into powders with suspension
and paste dryers.
Suspensoin and paste dryers are
extremely suitable for the processing of:
The feed injected through nozzles
dries on the inert particles of the
fluidised bed. In the process, the solid
material in the liquid is converted
reliably into a very fine powder which
is carried out of the dryer by the flow
of drying air. It is then separated
from the air in high-performance filter
systems.
- catalysts
- sodium nitrate solution
- metal hydroxide suspensions
- mirabilite
- anorganic sludges and waste water
- organic acids
- boron nitride
- flue-gas washing water
- carbonate slurry
- salt solutions
- leakage water from garbage
dumps
- pigment suspensions
- ceramic glazing suspensions
Fully automatic plant control.
The high efficiency of the fluidised
bed, the optimal utilisation of energy,
the clear conception of the plant
and the safe process control of the
ALLGAIER suspension and paste dryer
offers you an opportunity to produce
powders with a very economical
process.
The dryer can be heated with any commonly used heat transfer medium. The
exhaust gas temperatures are normally
low, resulting in optimum utilisation of
the energy.
Simple control concepts permit operation with only a few persons or even
fully automated operation.
Experimental plant in
the ALLGAIER technical
testing centre.
Allgaier Process Technology GmbH
Ulmer Straße 75
73066 Uhingen
Germany
Phone: +49 7161 301-175
Fax:
+49 7161 34268
[email protected]
www.allgaier.de
Manufacturing companies:
Mogensen GmbH & Co. KG
Kronskamp 126
22880 Wedel
Germany
Phone: +49 4103 8042-0
Fax:
+49 4103 8042-40
[email protected]
www.mogensen.de
Fredrik Mogensen AB
Sveavägen 26
544 21 Hjo
Sweden
Phone: +46 503 3234-0
Fax:
+46 503 13878
[email protected]
www.mogensen.se
Allgaier Mogensen S.A.U.
C/ Téllez, 24 - Oficina 4A
28007 Madrid
Spain
Phone: +34 91 5776277
Fax:
+34 91 5757495
[email protected]
www.almo.es