Paper Technology International 2020 - Journal - Page 43

PAPERTECHNOLOGYINTERNATIONAL
CASE: Increased production and energy savings
Runtech Systems conducted a hood ventilation
measurement and machine audit on a board machine. This mill
targeted increased production while decreasing steam consumption,
thus gaining energy savings. At the same time, the moisture level in
the machine hall should be lowered.
As a result of the survey, Runtech suggested several
improvements, which were approved to carry out in phases. As
a first step, hood supply fans for hood basement blowing were
installed. The fans were designed keeping in mind the pocket
ventilators that were installed later. Fresh steam consumption in the
supply air heating has been decreased with the new condenser coils
supplied by Runtech. With this first step, steam consumption was
reduced, resulting in energy savings.
The humidity of the hood exhaust air attained a satisfactory
level in the second step when hood exhaust fans were installed.
Also, the zero level for the hood reached the right height. Humidity
and temperature in the machine hall were decreased, providing
good working conditions for the mill operators.
In the last phase, pocket ventilation was installed. Delivery
included sheet stabilizers, a supply fan and an air duct set from
the new fan to sheet stabilizer for the first drying group. For the
second to fifth drying group, tens of pocket ventilators were installed,
including an air duct modification.
With these modifications and upgrades, the machine has
been able to increase production by 4%.
After this project, the same customer ordered a major
step-by-step ventilation rebuild on their other paper machine. The
rebuild includes new hood exhausts, heat recovery towers, pocket
fans and pocket ventilators as well as a machine hall ventilation
enhancement.
Trust the experts
At Runtech, we understand the causes and effects in the papermaking process. With the experience of thousands of audits and
studies at paper mills, we are able to benchmark the effectiveness of existing systems and equipment. All information comes
together in an often step-by-step rebuild or upgrade plan that results in minimized operational expenses coupled with a production
increase and/or runnability improvements.
This experience and expertise allows us to work with our customers to help them get the most from their systems, while ensuring
they achieve both their operational and process goals.
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