Paper Technology Journal 17 - Voith

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manner. The success and the highlights
mentioned here are a consequence of this
symbiosis.
During the first meetings it already
became clear that the communication
between the customer, supplier and local
engineering contractor worked excellently.
Based on a jointly optimized delivery
schedule, it was possible to start erection
three weeks earlier than planned. The
erection work, carried out by the customer
and supervised by Voith personnel,
was very soon far ahead of schedule.It
was, therefore, possible to complete erection
at the construction site eight weeks
ahead of the scheduled date, managed
excellently by the customer.
The startup process already promised to
be record-breaking: after starting at 80%
of max. operating speed, it was possible
17/04
to produce cigarette paper of high quality
at 100% max. operating speed after only
eight weeks. Only 5 months after startup,
Mudanjiang Henfeng Paper produced
high-porosity cigarette paper on its PM 12
at a speed that is 15% above its layout.
On the one hand, this is due to the technological
competence of the customer
and its highly qualified personnel, and
on the other hand it is due to the proven
and at the same time innovative machine
concept.
The machine concept
On two lines for long and short-fiber
pulp, the customer is able to make use of
the advantages of the TwinFlo refiners in
an excellent way: in order to maintain
porosity within the narrow limits required,
a freeness value that can be exactly
adjusted and, above all, is constant
over time is of fundamental importance.
A highly efficient cleaner plant, operating
according to the EcoMizer concept, as
well as the MultiScreen pressure screen,
especially designed for low-pulsation and
uniform stock throughput ahead of the
headbox, ensure a very good uniformity
of the stock suspension ahead of the
headbox and in the machine direction paper
profile. The use of ComMix for stock
component mixing and HydroMix for the
necessary stock dilution additionally reduces
the stock volume in the system
and, therefore, allows fast grade changes.
A RollJet K headbox ensures uniform distribution
of the stock across the machine
width. Just as the freeness and the
aproach flow system are important for
uniformity in machine direction, the
headbox is the decisive link for uniformity
in cross direction. Hardly any other
supplier beside Voith can offer a product
in this area that is as mature and perfected.
This headbox is still being developed
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