CLOSED PNEUMATIC SEPARATOR Russian patent published in 1999 - IPC

FIELD: agriculture, in particular, equipment for cleaning grain processing products by means of air flows. SUBSTANCE: closed pneumatic separator has pneumatic separation channel provided with device for feeding bulk material and communicated with its upper part via branch pipe to settling chamber, diametrical fan having suction window connected with settling chamber outlet, and exhaust diffuser communicated via recirculation channel with lower part of pneumatic separating channel. Inlet end of channel for partial discharge of dust-laden air is positioned in the vicinity of inner surface of exhaust diffuser housing at recirculation channel junction zone. Channel for partial discharge of dust-laden air is communicated with branch pipe of pneumatic separation channel and its inlet and outlet parts are communicated one with another via window in adjacent wall of pneumatic separation channel and recirculation channel. Outlet part of channel for partial discharge of air-laden air is defined by outer surface of exhaust diffuser housing and pneumatic separation channel wall faced to diffuser housing. Settling chamber is further provided with inertia baffle counterflow air cleaner. EFFECT: reduced power consumption, decreased metal usage and increased efficiency in separating grain material. 3 cl, 1 dwg