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Practical evaluation and operation of superheated steam drying process with different softwoods and hardwoods

Bewertung und Durchführung der Holztrocknung mit überhiltztem Dampf am Beispiel einiger Laub- und Nadelhölzer

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Abstract

Drying with superheated steam is evaluated in lumber from different Spanish softwoods (Pinus pinaster, radiata, sylvestris andnigra) and hardwoods (Eucalyptus globulus andPopulus sp.). Major problems with softwoods seem to be related to high resin content and encased knots. Problems with hardwood drying are related to permeability, collapse and checking tendency. The applicability of the determination of the internal wood temperature to decide on the end point of drying is also evaluated.

Zusammenfassung

Die Holztrocknung mit überhitztem Wasserdampf wird an Bauholz aus verschiedenen Laub- und Nadelholzarten bewertet. Größere Probleme bei Nadelholz hänge mit dessen hohem Harzgehalt zusammen. Probleme bei Laubhölzern ergeben sich aus deren Wegsamkeit und der Tendenz zu Kollabieren und Risse zu bilden. Die Brauchbarkeit der Temperaturmessung im Innern des Holzes zur Kontrolle des Endpunktes der Trocknung wird ebenfalls bewertet.

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Authors and Affiliations

  1. Forest Ind. Department, INIA, P.O. Box 8.11, 28080, Madrid, Spain

    H. Alverez Noves & J. I. Fernandez-Golfin Seco

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  1. H. Alverez Noves
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  2. J. I. Fernandez-Golfin Seco
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Alverez Noves, H., Fernandez-Golfin Seco, J.I. Practical evaluation and operation of superheated steam drying process with different softwoods and hardwoods. Holz als Roh-und Werkstoff 52, 135–138 (1994). https://doi.org/10.1007/BF02615209

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