How to save energy up to 30-70% in paper machine vacuum system? - Paper Technology International 2023 - Paper Technology International 2023 - Flipbook - Page 44

How to save energy up to 30-70% in paper machine vacuum system? - Paper Technology International 2023

PAPERTECHNOLOGYINTERNATIONAL How to save energy up to 30-70% in paper machine vacuum system? - Paper Technology International 2023
Take a look at these energy savings
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Uhle box vacuum: 15 kW/meter
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Drive power (uhle box friction): 7 kW/meter
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Increase in dryness (after press) 1-2% equals to 4-8%
less steam
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At least 25%, typically 40- 60% electrical savings
compared to LRP system
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Heat recovery energy savings rate: 80-200% of turbo
system total power demand
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Water and cooling tower cost savings: 100,000 EUR/
year
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Easy and fast maintenance of turbo blowers. Bearing
exchange during felt change (8h). All maintenance can
be done on site.
On average 2MW LRP system produces 3,500 tons of CO2
annually. With Runtech turbo rebuild you will also save 30-70% of
these emissions.
Discover the potential of your machine
Vacuum demand varies for different paper grades, felts and
machine speeds, therefore, a tailor-made solution with flexible and
variable capacity can balance the supply and demand, resulting in
optimized dewatering and minimized power consumption. Vacuum
levels are measured at the vacuum pumps and blowers to identify
problem areas. The dewatering elements such as flat boxes, saveall pans and uhle boxes are reviewed. Specialists study pressure
and bleed losses to analyze the energy consumption and evaluate if
the vacuum levels are too high.
With the experience of thousands of audits and dewatering
studies at paper mills, we are able to benchmark the effectiveness of
existing vacuum systems, dewatering equipment, suction elements,
fabrics and felts.
Today, over 950 Turbo Blowers have been sold globally. This
experience and expertise allows us to work with our customers, help
them get the most out of their papermaking process and vacuum
systems – and ensure they achieve both their operational and
process goals.
Engineered Solutions for Pulp and Paper Industry
Offering the industry’s most comprehensive equipment
portfolio for paper machine dewatering and vacuum systems,
coupled with our extensive papermaking know-how, Ingersoll Rand
businesses Runtech and Nash provide optimal solutions for all paper
mills, from service and rebuilds to completely new papermaking
lines.
Runtech’s offering includes save-alls, doctoring, forming
and dryer section cleaning systems. Our EcoFlow dewatering
measurement system significantly improves dewatering, doctoring
and cleaning processes, enabling increased dryness after the press
section. Runtech also offers runnability optimization as well as
ropeless tail threading.
Figure 7: Fit-for-purpose vacuum system and efficient
doctoring and dewatering solutions for forming and
drying sections are the fundamental base for the good
energy efficiency and low cost paper production.
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Paperturn flipbook system