Mathematical modeling of mechanical dewatering in the press section - Paper Technology International 2023 - Paper Technology International 2023 - Flipbook - Page 86

Mathematical modeling of mechanical dewatering in the press section - Paper Technology International 2023

PAPERTECHNOLOGYINTERNATIONAL
In addition, the influence of machine parameters, e.g.,
line load, as well as the influence of initial parameters, e.g., initial
saturation of the press fabric, have been analyzed and confirm that
we gain a deeper understanding of the interaction of the different
elements in the press nip by making use of the mathematical
modeling and simulation. Therefore, the process simulation helps
us to reevaluate existing press fabrics and press nip concepts and
is also used to develop new customized fabrics and concepts for
specific customer needs. With each application of the current model
library, we constantly reevaluate and refine the existing models and
extend their validity and range of application.
CONCLUSIONS AND OUTLOOK
With its capabilities to optimize current processes with respect to resource efficiency and product quality process, simulation is at
the intersection of two megatrends: digital transformation and sustainability. In comparison to virtual sensors or pure data models
which gain their high reliability in the prediction of process parameters from a period of training, multiscale simulations keep their
strong physical backbone in each step and allow insights into processes and materials. In the context of decarbonization and
increased process automation, where new and disruptive technologies are discussed and no long-term experience is available,
scientifically sound prediction of process stability, process efficiency, and production costs are essential to effectively decide
which path to follow. Also, with new green materials finding their way into the product development of paper machine fabrics and
roll covers, process simulation can help to predict their performance in their final application at the customer site. With an evergrowing field of applications and a constant advancement in the extent and the quality of our process simulation library our efforts
also help in addition to secure know-how and extend technical expertise with modern and state-of-the-art tools and methods.
References
[1] Kinstrey, R. and White, D. E. (2007) Pulp and Paper Industry Energy Bandwidth Study. Presented at TAPPI Fall Engineering/Pulping/
Environmental Conference, Jacksonville, Florida, USA.
[2] Turpin, D. (2016) Research Roadmap Drier Web before Dryer Section, Agenda 2020 Technology Alliance.
[3] Steve Cole (2011) The primary uses of energy on a paper machine. Pulp and Paper International (PPI), Vol 10.
[4] Darcy, H. (1856). Les fontaines publiques de la ville de Dijon. Dalmont, Paris.
[5] Terzaghi K (1925) Erdbaumechanik auf Bodenphysikalischer Grundlage. Franz Deuticke, Leipzig-Vienna.
[6] Brooks, R.H. and Corey, A.T. (1964). Hydraulic Properties of Porous Media. Hydrology Papers, No. 3, Colorado State U., Fort Collins,
Colorado.
[7] Vomhoff, H. (2001). Studies of the dynamic compressibility of water-saturated fiber networks. Tappi Journal, Vol 84: No. 4.
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