Paper Technology International 2023 - Flipbook - Page 93

PAPERTECHNOLOGYINTERNATIONAL
How to optimize paper machine performance by upgrading your wire section - Paper Technology International 2023
1. Formation and paper strength improvement
SmartFoils significantly improve the quality of all paper types.
The possibility to individually adjust the foil angle and height
increases the drainage capacity and optimizes the activity level in
the sheet forming zone of the wire table where the fiber mobility
takes place.
Figure 5: SmartValves: Low-Vacuum and High-Vacuum Valve.
2. Increased drainage capacity
The vacuum is also just as important for the paper properties
as the SmartFoils, and decisive for an optimal drainage efficiency.
Incorrect vacuum settings and non-existent actual vacuum values
very often lead to inefficient operation of the suction boxes, means
high energy consumption and expensive operation costs.
Electronically controlled vacuum valves are an important part to
individually control, both the low-vacuum area and the high-vacuum
area of the wire table, and thus increase the paper quality and the
dewatering performance through optimally applied vacuums.
Figure 3: Smart ActivityFoil and HydroFoil.
Using the continuously adjustable elements, the foil angle (in
case of HydroFoils) and the foil height (in case of ActivityFoils
and FormationFoils) can be adjusted. This leads to an optimal
activity level of the suspension. Subsequently the formation can be
improved significantly.
Due to integrated vacuum sensors, operators have an
overview of the existing vacuum in the suction boxes and are able
to adjust it individually, if necessary. The vacuum control gives
operators the safety to know what’s happening inside the boxes
as well as the possibility to easily reduce costs by minimizing the
vacuum. The Röchling Smart Vacuum Valves are highly reliable
due to their integrated cleaning mechanisms and maintenance-free
because to their intelligent construction.
3. Reduced energy costs
“The more the better” is a common rule for the vacuum levels in
a paper machine. But these unnecessary high vacuum levels often
do not improve the dewatering. Quite the contrary, they lead to a
high friction between dewatering elements and forming fabric. This
friction causes several problems, for example:
Figure 4: Comparison of not using SmartFoils and using
SmartFoils | Formation value was measured with optical formation
measurement laboratory device (Techpap 2D lab). The lower the
value, the better the formation.
•
Higher wear of dewatering element and forming fabric
•
High driving power
•
Higher energy costs
With the combination of SmartValves for controlling the vacuums
and the Smart Consistency Sensors, the vacuum can be reduced
without losing dewatering efficiency. Unnecessary high vacuum
levels are a thing of the past and therefore the driving power is
reduced. Reduced vacuums also mean that less air flow needs to
be provided. These two advantages can lead to significant energy
savings.
A better formation leads to higher strength properties,
followed by a better paper quality, or the possibility to reduce costs
for expensive raw materials like softwood or strength improvement
additives.
Figure 6: Smart Consistency Sensor.
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