Improving the management of the drying process of larch lumber
Abstract
Modern systems of automatic control of the technological process parameters in general and in particular drying of larch lumber in particular make it possible to implement almost any structure of modes. Therefore, three or more stages of drying modes are implemented in modern drying chambers.
Changing the parameters of the drying agent that circulates through the inter-row channels of the lumber stack causes the transfer of the heat energy of the dried wood and withdrawal of the moisture from the surface of the boards. Thus, changing the rigidity of the drying mode regulates the intensity of moisture emission from wood. To implement this approach, wood is presented not only as a capillary-porous body, but also as a bundle of open microchannels. Then the basic principles of the physics of capillary phenomena are realized here.
As the practice of drying larch lumber shows, this approach does not solve the task. According to the authors of the article, the presented approach does not consider such a phenomenon as the extraction of water-soluble substances in larch lumber with an increase in temperature. As a result, this extraction forms permeate in the surface layers of the board, which significantly changes the mechanism of water emission from wood. The formed permeate layer is the main factor constraining the process of water emission. This article proposes an approach to regulating the parameters of the drying agent of larch lumber. It helps to minimize the negative effect of the extractive substances layer on the intensity of water emission from larch wood.
About the Authors
Sh. G. Zaripov
Lesosibirsk Branch of Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
29 Pobedy str., Lesosibirsk, 662543
V. A. Korniyenko
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii Rabochii prospekt, Krasnoyarsk, 660037,
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Review
For citations:
Zaripov Sh.G., Korniyenko V.A. Improving the management of the drying process of larch lumber. Conifers of the boreal area. 2022;40(2):145-152. (In Russ.)
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