Paper Technology Journal 19 - Voith

● Project duration max. 18 months
● Shutdown time max. 65 days, incl. the
extensive civil engineering work.
The project developed, based on these
targets, from the first day on into a superlative
for design, planning and logistics.
Voith was able to convince the customer
in the project phase that this could
only be achieved by minimizing the interfaces,
i.e. by Voith Paper supplying all
the equipment and taking overall responsibility.
The order covered not only
the paper machine based on the proven
One Platform Concept with DuoCentri-
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NipcoFlex Press and Online Janus Calender,
but also all auxiliaries, the approach
flow system including broke pulper as
well as the complete production line engineering.
As part of the Process Line
Package (PLP), the scope of supply also
covered the process pumps, tanks, piping
and air system equipment as well as the
entire installation work, start-up and personnel
training.
Project handling
Cramped space conditions and the linkage
of the process piping and wiring with
paper machines 7 and 8 that have grown
over the years rendered the implementation
of the rebuild activities difficult.
During the planning phase further basic
knowledge of the extent of the construction
work to be carried out in the peripheral
system became transparent. This
necessary civil engineering work required
detailed progress and deadline schedules.
Optimal implementation of the
activities between civil engineering and
mechanical engineering was required to
meet the time frame.
When the old PM was shut down on
July 2, 2004, a meticulously planned
rebuild action began. The first machine
parts in the wet end had hardly been dismantled
when the civil engineering work
began with excavators lifted in through
the roof to demolish almost the complete
machine framing.
The dismantling of the cabling, which has
grown over the decades, had to be prepared
in tricky detailed work. Tracing of
Fig. 1: Maxau PM 6.
Fig. 2: Schematic of Maxau PM 6.
Fig. 3: Wire change.
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cable routes, existing dead cables, identifying
the cables and safety-conscious
dismantling of the cables called for
months of preparation work. The result
was extremely positive. Neither of the
two paper machines still running was
stopped, and the safety requirements
were all met.
The reel section with Sirius reel and
Janus calender were already installed
when the construction workers were still
working on the wet-end foundations.
At times more than 1,300 erectors, civil
engineering workers, electricians, pipe
layers, etc., were performing the impossible
on a daily basis in cramped space
conditions: punctually on August 31,
2004 the main part of the installation
work was finished and the start-up team
could begin with the check-outs.
19/05
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