Agitation is a key factor in chemical pro-
cesses as it improves the mass transfer of
the reagent and crystallisation conditions
in the reaction slurry.
During the reaction period of phosphoric
acid production, agitation is used for the
To keep the solids suspended.
To renew the liquid layer (reagent) on
the phosphate grains.
To break the foam on the surface of
To be economical this process needs to
be performed with as low a power con-
sumption as possible. PRAYON TECH-
NOLOGIES has developed a special type
of agitator to fulfil these requirements.
The bottom blade is a helicoidal shape
to ensure a high pumping rate. It keeps
solids suspended and the compartment
clean. The middle blade is a pitched blade
with a pumping effect. It also generates
shear, which improves the mass transfer
and the incorporation of the reagents.
The top blade is a vertical turbine blade
with an antifoaming effect (achieved by
splashing liquid on the reactor surface)
and helps incorporate reactants fed to
the surface of the reactor.
In the digestion section, strong agitation
is no longer necessary. Only helicoidal
blades with low specific power consump-
tion are used.
For a few years now, PRAYON TECH-
NOLOGIES has been using a Computer-
ized Fluid Dynamics software in order to
further improve the design of its agitators.
PRAYON REACTION TANK AGITATOR