Runtech’s energy efficient vacuum revolution, Anna-Riina Ahonen, Marketing Manager, Runtech Systems

PAPERTECHNOLOGYINTERNATIONAL
Figure 3: Flexibility is needed to operate tissue machine efficiently.
Consider a double-width tissue machine with a
specified vacuum capacity that accounts for various operational
contingencies. In actuality, the needed capacity under stable
conditions could be significantly lower, allowing for vacuum level
adjustments that optimize performance and energy use.
Integrating EcoFlow dewatering measurements into vacuum
system rebuilds extends benefits beyond electricity savings. It also
simplifies vacuum control, improves moisture extraction, conserves
water, accelerates felt conditioning, reduces felt costs, increases
production, and facilitates the recovery of exhaust air heat energy.
EP Turbo Blower Innovation
Runtech’s pioneering EP technology revolutionizes vacuum
systems in paper machines through the use of variable speed turbo
blowers, achieving substantial energy cost reductions ranging from
30% to 70% when compared to conventional systems. These turbo
blowers operate without water, eliminating the costs associated
with water handling and treatment in traditional vacuum systems.
The variable speed feature of EP Turbo Blowers offers seamless
optimization capabilities, allowing for an effortlessly fine-tuned
vacuum system that surpasses the operational efficiency of standard
offerings.
Incorporating advanced blowers with integrated high-speed
motors governed by frequency converters, EP technology enables
meticulous control over the rotational speed and vacuum levels,
tailoring them to the nuanced needs of the papermaking process.
This precision is especially beneficial in new installations, where
the actual vacuum requirements may only be discernible once
production commences. EP Turbo Blowers are designed to adapt
swiftly, avoiding the ineficiency of throttling and minimizing air
losses.
The design of EP Turbo Blowers is characterized by
its streamlined efficiency, featuring impellers mounted directly
onto the motor shaft. This design choice not only simplifies the
system but also enhances its reliability, as it requires just two
bearings throughout the entire blower. Moreover, the compact
design expedites the installation process, making it a swift and
straightforward task. With active magnetic bearing technology,
these turbo blowers not only boast increased energy efficiency but
also demand less maintenance, further enhancing their appeal and
reducing long-term operational costs.
Figure 4: The new felt is more open, so the airflows are very close to the machine supplier specifications.
Break in period is typically 8 hours to 2 days. In 90 to 95 percent of the felt lifetime, the needed airflow is 40-60% of the specified values.
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