Open AccessConvective hot-air chambers impulse drying of pear wood lumbers
Author(s) -
D.I. Deyanov,
С. А. Моисеев,
G.N. Kuryshov,
A.A. Kosarin
Publication year - 2021
Publication title -
lesnoj vestnik
Language(s) - English
Resource type - Journals
ISSN - 2542-1468
DOI - 10.18698/2542-1468-2021-4-107-111
Subject(s) - pear , impulse (physics) , materials science , pulp and paper industry , wood drying , hardwood , water content , composite material , environmental science , moisture , horticulture , engineering , botany , geotechnical engineering , physics , quantum mechanics , biology
A review of literary sources on the physical and mechanical properties of pearwood and its use as structural elements of furniture is given. The aerodynamic chambers, their advantages and disadvantages, as well as their modernization are considered. The use of impulse modes for drying hardwood is substantiated, including sawn timber from pear wood 50 mm thick, pilot drying of which began in the modernized URAL-72 chamber in 1999 at Intar LLC, Moscow. The moisture content of the wood samples and the value of internal stresses were controlled in accordance with GOST 16588. The process of impulse drying included from 9 to 12 steps, the temperature at the operating stage ranged from 45 °C to 72 °C. It has been proved that the use of pulse modes for drying pear timber saves up to 30% of electricity.