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Through air drying assisted by infrared radiation: The influence of radiator power on drying rates and temperature
RISE - Research Institutes of Sweden, Bioeconomy.ORCID iD: 0000-0001-9342-2269
Holmen, Sweden.
Karlstad university, Sweden.
2018 (English)In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669Article in journal (Refereed) Published
Abstract [en]

The use of infrared radiation for heating the web in the through air drying process was investigated in lab scale. The hypothesis was that infrared radiation should be a more efficient method to transfer drying energy to the wet web compared to hot air, but that a certain air flow is still required as a transport medium for the evaporated water. A trial program comprising handsheets made of two types of bleached chemical pulps, five grammages (15, 22, 30 and 60 g/m2), and dried with five radiator power levels was performed on a lab scale through air drying equipment. Drying times of the samples were determined from temperature data recorded with an infrared camera. The use of infrared radiation shortened drying times, especially for low grammage samples. The shortening of the drying time ranged between 10 and 45 %. The most substantial shortenings were obtained for the lowest grammages and the highest radiator power level. However, the increase of power did not linearly shorten drying time. After an initial shortening at the lowest power level, the positive effect of the IR heating decreased as the power was further increased.

Place, publisher, year, edition, pages
De Gruyter Open Ltd , 2018.
Keywords [en]
Chemical equipment, Drying, Infrared radiation, Pulp, Radiators, Solar dryers, Thermography (temperature measurement), Tissue
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-35535DOI: 10.1515/npprj-2018-2002Scopus ID: 2-s2.0-85054212752OAI: oai:DiVA.org:ri-35535DiVA, id: diva2:1259594
Note

cited By 0; Article in Press

Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2018-10-30Bibliographically approved

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Publisher's full textScopushttps://www.degruyter.com/downloadpdf/j/npprj.ahead-of-print/npprj-2018-2002/npprj-2018-2002.pdf

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Tysen, Aron

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CiteExportLink to record
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  • apa
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