CLOSED LOOP SYSTEM OF AIR CIRCULATION Russian patent published in 2004 - IPC

FIELD: woodworking industry.

SUBSTANCE: the invention is dealt with timber industry, in particular, with a closed loop system of air circulation for an installation used for sorting of wood chips into separate factions. The technical result is an increase of an overall performance of the installation. For this purpose the system includes a device intended for sorting of wood chips of different sizes and-or small-sized particles in a chamber of wood chips treatment into separate fractions with the help of an air stream, which comes from one or several chambers of nozzles through the slots in the nozzles into the chamber of wood chips treating, in which a pulsed action is applied to the treated wood chips sliding along an inclined supporting surface. At that the indicated air is circulating from the chamber of the wood chips treating through a dust trapping cyclone into indicated one or several chambers of nozzles. At that control over the operation of the dust-trapping cyclone is carried out with the help of a ventilation fan and control over operation of chambers of nozzles is carried out with the help of ventilating fans. At that between the ventilation fan, which exercises control over the operation of the dust-trapping cyclone and ventilating fans with the help of which the operation control of chambers of the nozzles is carried out there is a channel or a chamber located between tubes passing from the dust-trapping cyclone to the chambers of nozzles so, that the indicated tubes are passing from the dust-trapping cyclone to the chamber of nozzles in contact with the open air.

EFFECT: the invention ensures an increase of efficiency of the installation operation.

5cl, 2 dwg