Paper Technology Journal 17 - Voith

4
The smaller chest volume and the optimized
flow provided by its new geometry,
as shown in Fig. 3, has meant pulping intensity
is up to 40 % higher for the same
installed power. The result is a significantly
better suspension movement,
which in turn improves sheet draw-in and
pulping intensity.
A benchmarking comparison with popular
rotor geometries was also carried out
during the development trials. The find-
Chest width for one rotor [m]
8
7
6
5
4
3
2
1
0
3
AK4 CP130 AK12 CP280 AK26 CP340
Fiber Systems
ings revealed a better pulping efficiency
with the AK rotor compared with all other
rotors investigated. Since the high shear
potential of the AK rotor is fully exploited
due to the improved stock movement, the
decision was made to continue using it
in future.
The mill trials clearly showed, however,
that optimum operation also depends on
correct functioning of the showers and
control system.
In summary, the new CP CompactPulpers
offer significant improvements:
● Savings in space thanks to the slim
and compact pulper design
● Up to 40% more pulper working width
for the same installed power (Fig. 4)
● Maximum chest width 12 m
● More intensive pulping thanks to faster
circulation and better rotor contact
● Reduced splashing and better draw-in
by using an optimized deflector design
● Optimal exploitation of rotor
performance potential and less air
ingress into the broke system thanks
to good submersion of the rotor.
Like every new Voith product, the first
CompactPulper was intensively monitored
after commissioning. The assumptions
were shown to be correct and all
25 CompactPulpers so far installed are
operating faultlessly. The good order intake
since market launch of the Compact-
Pulper reflects customer confidence in
this technology.
9
17/04