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4.5.3 Vortex modules
The vortex modules provide for effective mix-
ing of the air and water mist.
Due to their special design, they generate
turbulence and shear zones which lead to a
homogeneous distribution of aerosols along
the humidification section (min. 0.9 m).
The vortex modules (dimensions: 150 x 150
mm) are delivered individually and can be
assembled to form a wall. For optimal moisture
absorption, the air velocity is 0.9...2.8 m/s. The
vortex module wall exhibits a low pressure drop
of 80 Pa at an air velocity of 2.0 m/s.
4.5.3.1 Atomising nozzles for vortex
modules
Desalinated water at a pressure of 25 to75
bar reaches the high-pressure nozzles where
the water is atomised to form ultra-fine mist-
like aerosols. The aerosols enter the area of
the vortexed air stream downstream of the
vortex modules. The air and aerosols are
mixed intensively here.
Two different types of atomising nozzles are
used: atomising nozzles with a spray angle of
120° for general application and those for the
edge areas of the vortex module wall featu-
ring a spray angle of 60°.
Functioning:
Water is forced with high velocity into circu-
lation by the swirl insert of the nozzle.
Thereby the required atomisation of water
into extremely fine aerosols takes place at
the outlet opening.
The high operating pressure of the water (up
to 75 bar) is nearly completely translated into
the exit velocity from the nozzle. The higher
the operating pressure the finer the droplets.
Material of the high-pressure nozzle:
St.
1.4404
Spray characteristics operating pressure
of 75 bar
•
Volumetric flow rate: 7,1 l/h *)
•
High percentage of droplet distribution
in the range of 6-35 µm
*) Information is subject to change or altera-
tion without prior notice
Vortex module
Vortex modul wall
1
2
1 - nozzle body 2 - nozzle opening
