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Enhancing Through Air Drying Process Efficiency: Investigating Laboratory-to-Pilot Scale Correspondence and Impact of Process Variables on Tissue Paper Manufacturing
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013).ORCID iD: 0000-0003-4023-594X
Valmet AB, Sweden.
Polyniora, Halmstad, Sweden.
2023 (English)In: BioResources, E-ISSN 1930-2126, Vol. 8, no 4, p. 8264-8283Article in journal (Refereed) Published
Abstract [en]

State-of-the-art manufacturing of tissue paper by Through Air Drying provides excellent product performance, although at a high production cost and energy use. In this work, a laboratory scale vacuum suction box was used to mimic the initial dewatering and the Through Air Drying molding, together with a pilot-scale trial. The purpose was to investigate both how the laboratory scale corresponds to pilot scale testing and investigate how fabric design, basis weight, beating, and fibers affect dewatering and sheet caliper. This study reevaluates dewatering mechanisms during molding, challenging the previous hypothesis of pure air displacement dewatering. Results show a parallel mechanism of compression dewatering and air displacement. The influence of rush transfer is examined, impacting the sheets’ visual appearance, thickness, and solids content. Correlations between molding box solids content and headbox freeness emphasize significance of fibers and beating levels. Pilot results confirm the link between former solids and molding box solids. Pilot trials validate the laboratory results, facilitating comprehensive simulation of full-scale manufacturing. This research reveals dewatering mechanisms, highlights operational parameters, and enables effective Through Air Drying process design and refinement.

Place, publisher, year, edition, pages
North Carolina State University , 2023. Vol. 8, no 4, p. 8264-8283
Keywords [en]
Through air drying, TAD, Dewatering, Vacuum dewatering, Molding, Energy efficiency, Tissue
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Chemical Engineering
Identifiers
URN: urn:nbn:se:kau:diva-97116DOI: 10.15376/biores.18.4.8264-8283ISI: 001116826400007Scopus ID: 2-s2.0-85174932742OAI: oai:DiVA.org:kau-97116DiVA, id: diva2:1806280
Funder
Karlstad UniversityKnowledge Foundation, 2022-0024Available from: 2023-10-20 Created: 2023-10-20 Last updated: 2024-07-04Bibliographically approved

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Sjöstrand, Björn

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