METHOD FOR PULSE LUMBER DRYING Russian patent published in 2017 - IPC F26B3/04 F26B25/22 

FIELD: woodworking industry.

SUBSTANCE: lumber drying is carried out in several stages, including preheating, drying and additional maintaining. The pulse lumber drying process is performed cyclically, it includes additional pre-heating and maintaining. The mode of supplying fresh air to the drying volume and an energy carrier to the heater while circulating the heated air in the drying volume, which corresponds to the "work" operation, is alternated with the mode of complete cessation of supplying the fresh air and the energy carrier to the heater, and the heated air circulation in the drying volume, which corresponds to the "pause" operation. In the "pause" operations, the temperature by the dry termometer and the relative humidity of the drying agent are determined, by which the equilibrium moisture content of the lumber to be dried is found, and the current average moisture of the lumber to be dried is determined by its equilibrium moisture content at the end of the "pause" operation.

EFFECT: method allows to increase productivity, improve the drying lumber quality while reducing labour costs.

1 dwg, 3 tbl