METHOD FOR WOOD TIMBER VACUUM DRYING Russian patent published in 2017 - IPC F26B5/04 F26B3/347 F26B3/04 

FIELD: wood industry.

SUBSTANCE: vacuum drying method is to create a zone of reduced pressure finding lumber in the range from 5 to 150 mm Hg and temperature within 5-25°C greater than the temperature of boiling water at a predetermined reduced pressure. Before drying, the wood timber 1 is placed in a sealed elongate shell 2, open on one end face 3 neck. After this timber is placed in the shell, it is placed in a heat chamber, which can run on both microwave radiation and by convection principle (heat chamber not shown). Through the neck 3 inner cavity shell 2 is connected to a vacuum pump. With the simultaneous inclusion of the heat chamber, the vacuum pump is activated (the latter is not shown at the scheme). The drying time is determined by wood dampness, then heat chamber is turned off. Sealed casing 2 with its contents is removed from the heating Chamber and is discharged from the lumber.

EFFECT: increased efficiency.

1 dwg