METHOD OF WOOD DRYING Russian patent published in 2014 - IPC F26B3/34 F26B3/353 

FIELD: heating.

SUBSTANCE: invention relates to the field of wood processing and may be used, in particular, to dry saw timber. The method consists in the following: boards are laid into a stack made of packets, of at least two layers of boards, with separating elements in the form of racks, Between the packets they place film resistive electric heating elements that cover all cross-section area of the stack, besides, they lay a row of heating elements onto its upper surface, and the elements are equipped with reflectors of thermal flow arranged at the bottom and top of the film electric eaters for direction of heat inside the stack, power supply voltage is supplied to electric heaters. Drying is carried out by means of dry heating with the help of electric heating elements. The drying process is carried out cyclically depending on temperature of board heating by readings of a temperature sensor installed inside the board in the stack: as heating temperature achieves 40-45°C, the power to electric heaters is switched off, and as it reduces to 35-38°C, electric heaters are again switched on, drying is carried out at 35-45°C. The drying process is controlled by sensors of moisture and temperature, ventilation is switched on at moisture equal to 85-90% and switched off at moisture of 60-65%. To eliminate fog and dew accumulation on the surface of electric heaters, the latter are made with perforation. The drying process is completed in accordance with the specified readings of moisture of certain type of wood.

EFFECT: method makes it possible to reduce energy intensity of drying process at provision of required quality of drying.

3 cl