CLOSED PNEUMATIC SEPARATOR Russian patent published in 2003 - IPC

FIELD: agricultural engineering. SUBSTANCE: separator has pneumatic separating channel and additional pneumatic separating channel with bulk material charging device and bulk material fraction discharge device, main and additional settling chambers with device for discharging separated fraction particles of bulk material, baffle-type grid, main and additional recirculation channels, and cross- flow fan. Additional pneumatic separating channel, additional settling chamber, additional recirculation channel and cross-flow fan together define additional closed pneumatic system. Main and additional pneumatic separating channels have single separating wall equipped with window. Lower part of additional settling chamber is positioned in upper part of main upper settling chamber. Two pneumatic systems with single cross-flow fan operate in succession to enable effective removal of contaminants. EFFECT: increased efficiency in removal of contaminants and separating of bulk materials into fractions. 3 cl, 1 dwg