Abstract: The apparatus for removing dust particles from an air stream, particularly for ventilating mines, comprises a centrifugal separator (3), which rotates in a housing (1), a blower (4), and a device (6, 7) for spraying or atomizing water and for delivering it to the air stream entering the centrifugal separator (3). The centrifugal separator (3) comprises a plurality of blade wheel sections (8, 9) having blades (14) which are joined to walls (10) which flare like funnels. The blades of said blade wheel sections (8, 9) extend approximately in axial planes. Said blade wheel sections (8, 9) are preceded at the air inlet end by at least one blade/wheel section (15) in which the generatrices of the blade surfaces (blades 17) which are equidistant from the axis are inclined by an angle of incidence (.alpha.

Abstract: A gas scrubber having an air inlet and an air exit, said scrubber comprising: a plurality of venturi tubes having upstream ends and downstream ends, the venturi tubes being arranged parallel to each other; a centrifugal separator in communication with the downstream ends of the venturi tubes; a blower for drawing dust-laden air into the upstream ends of the venturi tubes and then into the centrifugal separator; nozzles for introducing water into the air flowing through the venturi tubes; an inner tubular housing surrounding the venturi tubes; an outer tubular housing surrounding and spaced from the inner tubular housing so as to form a space between the housings; a conduit for conducting air from the blower to the air exit; a funnel widening in the air flow direction so as to have an inlet end and an outlet end of larger cross section than the inlet end, the inlet end being connected to the air exit; and porous air filter material connected completely across the outlet end of the funnel.

Abstract: Apparatus for removing dust particles from an air stream includes a tubular housing having an inlet end and an outlet end; a plurality of Venturi tubes having open inflow ends and open outflow ends supported side-by-side within the housing, with their axes parallel to the housing axis so that their inflow ends receive air flowing into the inlet end of said housing; a nozzle for spraying water into the air entering each of the Venturi tubes whereby dust particles in the air are collected in the water and whereby sludge-containing water and air are discharged through the outflow ends of said Venturi tubes; a tank which surrounds said tubular housing, the tank having an outer wall surrounding and spaced from the tubular housing and partition means in the space between said outer wall and the tubular housing dividing the space into first and second compartments; a sludge separator in communication with the outflow ends of the Venturi tubes; conduit means connected to the sludge separator for supplying sludge-cont

Abstract: A device for separating dust particles from an air stream, in particular for mine ventilation, comprising a centrifugal separator, a blower for conveying the air stream through the centrifugal separator, and a device connected in advance of the centrifugal separator in the air flow direction to spray or atomize water which is fed into the air stream entering the centrifugal separator, the centrifugal separator being formed from at least one impeller with substantially radial blades connected together at their outer ends by circumferentially extending walls, the distance of which from the axis increases in the air flow direction, passage apertures being provided to the housing at the positions of greatest diameter.