Paper Technology International 2024 - Journal - Page 132
PAPERTECHNOLOGYINTERNATIONAL
“The cooperation with Voith has enabled us to set
new standards in sustainable paper production,” con昀椀rms
Armin Vetter, Managing Director Production and Technology at
Schoellershammer. “Thanks to the BlueLine stock preparation
system and the XcelLine paper machine, we have achieved high
energy ef昀椀ciency and can produce packaging papers in a resourcesaving way. Voith technologies, such as the In昀椀ltraDisc昀椀lter (IDF)
and DuoCentri NipcoFlex technology, contribute to ef昀椀cient water
use and energy savings. The EcoHood dryer section hood enables
extensive heat recovery and optimum operating ef昀椀ciency. Our trust
in Voith has paid off, we are extremely satis昀椀ed with the solutions.”
Ef昀椀cient water use and energy savings with Voith’s
In昀椀ltraDisc昀椀lter (IDF) and HiCon 2.0 technology
The PM 6 operates with Voith’s In昀椀ltraDisc昀椀lter (IDF)
disc 昀椀lter system. These 昀椀lters are among the decisive factors
for economical water consumption in production. Thanks to the
excellent and reliable 昀椀ltrate quality, the wastewater quantity
and freshwater requirement can be set to a low level without
process stability suffering. The super clear 昀椀ltrate produced
allows wastewater treatment to be operated without pretreatment.
This is unique to date and can only be achieved reliably with
In昀椀ltraDisc昀椀lters. Today, the 昀椀lters are equipped with modern
FloWing 昀椀lter discs. Fewer impurities in the process water result
in less downtime and less maintenance. All BlueLine solutions
contribute signi昀椀cantly to the exceptionally low energy consumption
of stock preparation.
The TwinPulp LC pulping system from Voith is characterized
by the ef昀椀cient use of Intensa technology. This technology enables
fast and thorough mixing of the suspension in the pulper. The
specially designed tank of the pulper works in conjunction with the
eccentrically arranged rotor to generate optimum turbulence. As a
result, mixing of the slurry is faster and bale intake is accelerated.
The modern cleaner system, screening systems and disc 昀椀lters
enable feed-forward concepts and high stock consistencies to be
132
Figure 2: Schoellershammer PM6 Stock Preperation
realized. As a result, in addition to the energy requirements of the
process machines, the power consumption of the process pumps
can also be signi昀椀cantly reduced.
To further increase ef昀椀ciency, Schoellershammer not only
relies on proven processes, but also integrates new, innovative
automation and digitalization solutions from Voith. Thanks to an
innovative reject ejection system, the system reliability of high
consistency cleaning is signi昀椀cantly increased and maintenance is
reduced at the same time. Another groundbreaking solution enables
reliable measurement of dirt particles in the accepts. On this basis,
concepts are being developed with which 昀椀ber losses can be
further reduced. Through the combined use of these technologies in
conjunction with other solutions, the concept of autonomous stock
preparation can be successfully implemented step by step. The main
objective of autonomous stock preparation is to continuously reduce
昀椀ber losses and energy consumption, taking into account resource
costs. In addition, the reduction of manual interactions optimizes
operational stability and reliability, and visualization improves cost
and performance overview.
Thanks to various ef昀椀cient process solutions and optimized
freshwater consumption of individual products and sections, the
freshwater savings of PM 6 are considerable. It now only requires
3.3 cubic meters of freshwater and 2.5 cubic meters of wastewater
per ton of paper produced. By way of comparison, the German
Environment Ministry assumes an average freshwater consumption
of around 10 cubic meters per ton for OCC plants. Packaging
papers made from recovered paper are produced today with an
average freshwater consumption of 6.5 cubic meters of freshwater
per ton.
