DEVICE FOR PRODUCTION OF INERT FOAM PUMP Russian patent published in 1997 - IPC

FIELD: mining industry; prevention and extinguishing of spontaneous mine fires occurring in worked-out spaces of coal seams. SUBSTANCE: the offered device includes transporting pulp feed-line, ejector with sleeve and bypasses, calibrated outlet and gas flow sprayer counted on it, pipelines for supply of reagents - pulp (water) and inert gas. Branch pipe supplying liquid phase (solution of foaming agent) is introduced into zone of rarefaction tangentially and gas supplying channel has, at least, one bypass with its bypass channel made from converging part of ejector to zone of its rarefaction. Secured to sleeve is sprayer of main gas flow. Outlet channels of bypass channels are of flat-spray kind and displaced in height relative to each other. EFFECT: higher efficiency of preventive volume treatment of worked-out spaces of coal seams ensuring decrease of spontaneous fire hazard. 2 cl, 2 dwg