DEVICE FOR PURIFICATION OF OPEN PIT AIR Russian patent published in 1995 - IPC

FIELD: purification of open pit atmosphere. SUBSTANCE: device for purification of open pit air has exhaust tube with blackened outer coating and auxiliary branch pipe with gate. Upper end of exhaust tube is connected with balloon and its lower end is communicated with purification unit. The latter is made in form of trench with gravel layer. Made on trench bottom are offtakes. Located above gravel layer is insulating cover. Arranged in gravel layer are lower parts of exhaust and supplying tubes. The latter has light reflecting coating, perforation in lower part and protective plate. Air gets into supplying tube, passes through gravel layer for purification, and purified air passes exhaust tube. EFFECT: higher efficiency. 1 dwg