Tissue360 - Fall/Winter 2016 - 41
Vacuum Blower Saves
40-50 Percent Tissue
Increasing energy costs and environmental/sustainability
issue are driving factors
Customers in the tissue and paper
industry are increasingly retrofitting their
production plants with TURBAIR® blowers,
according to Germany-based MAN Diesel
& Turbo. Rising energy prices and growing
environmental awareness are behind a boom
in sales of vacuum systems developed and
constructed by MAN Diesel & Turbo at its
Zurich, Switzerland, plant. Tissue and paper
manufacturers appreciate the numerous benefits of blower technology compared with
traditional vacuum generation using water
ring pumps, the company reports.
The TURBAIR vacuum system is used
for many new installations of tissue, paperboard, and paper machines. At the same time,
there is a strong trend toward conversion.
The 200th TURBAIR type RT vacuum system left the MAN Diesel & Turbo factory in
Zurich at the end of January. The vacuum
system consists of two type RT 56 and RT 71
single-stage vacuum blowers, and will replace
a total of 10 old water ring pumps for a South
"The TURBAIR technology gives tissue,
paper, and paperboard producers a huge competitive advantage compared with conventional vacuum systems. Our vacuum system
not only makes a significant contribution to
environmental protection, it also enables a
massive reduction in production costs at the
same time," explained Manfred Dobler, head
of Paper Industry at MAN Diesel & Turbo.
Vacuum systems play a central role in the
paper production process. They are deployed
at the point in the production process at
which the installation dewaters the paper
using vacuum. TURBAIR systems from MAN
Diesel & Turbo handle volume flow rates of
180 up to 2,800 cubic meters/min.
The sustained success of TURBAIR is based
on a number of factors:
* Constructed using radial flow impellers,
the vacuum blowers generally have an
absorbed energy consumption that is up to
30 percent lower than conventional water
ring pumps since there is no frictional loss
caused by the water ring.
* The TURBAIR blowers do not require seal
water, so operators can save on fresh water.
* Depending on the grammage, speed, and
material composition of the type of tissue
or paper to be produced, the paper machine
needs different volumes of air and vacuum
levels for optimum, cost-effective dewatering. The TURBAIR blower types have a
wide working range so the blowers can also
be efficiently operated under partial load.
This leads to a further, up to 30 percent,
reduction in energy consumption.
* Another advantage is that MAN's blowers
have no wearing parts and are especially
easy to service. Even older generation
vacuum blowers installed by MAN more
than 60 years ago are still working to the
total satisfaction of numerous customers.
* As well as the broad working range of the
blower, frequency-controlled drives are
increasingly being used. This allows not
only the air volume, but also the vacuums to be adapted optimally to the conditions of the paper machine. This leads
to a further, up to 20 percent, reduction in
"In combination, these benefits result in a
simple return-on-investment calculation for
our customers. The amortization time of a
TURBAIR system of this kind, installed in
an existing tissue or paper production mill,
is less than two years," Dobler explains.
Numerous conversion references evidence
LEFT: TURBAIR vacuum blower type RT
ABOVE: Automatic output regulation
RIGHT: TURBAIR® vacuum blower type RC
Tissue360º FALL/ WINTER 2016