Abstract: An axial swirl device for a contact and separation member for mass-exchange nd separation apparatuses, having a sleeve (1) which has a closed inlet end and an open outlet end and vanes (2) located on the outer surface of the sleeve to extend at an angle with respect to the longitudinal axis of the sleeve (1) in the zone of its outlet end. A deflector means (6) is provided at the outlet end of the sleeve (1) coaxially therewith. The deflector means (6) is mounted coaxially with the sleeve (1) at the outlet end thereof and made in the form of a body of revolution having the generant of its outer surface which is so shaped that a tangent line drawn to the generant at the point thereof remotest from the vanes (2) extends at an angle of from 0.degree. to 15.degree. with respect to the longitudinal axis of the sleeve (1).

Abstract: A contact-and-separating element of a vortex tray of liquid-gas mass-tranr apparatus comprises a nozzle (1). At least one annular row of holes (2) is provided at the inlet end of the nozzle. Accommodated inside the nozzle (1) is an axial swirler (3) having at least two inclined vanes (5). A separator (9) is provided at the outlet end of the nozzle (1). Located in front of each inclined vane (15) of the swirler (3) on the side of the nozzle inlet end is an additional rib (6) arranged straightwise along the nozzle (1) axis. In addition, there is provided at least one intermediate rib (7) interposed between each pair of the straight ribs (6). The annular row of holes (2) is located in the zone where the straight and intermediate ribs (6,7) are situated.

Abstract: The mass-transfer apparatus comprises a case (1), accommodating at least one horizontal perforated tray (6) and a froth retainer (7). The froth retainer (7) is mounted directly on the tray (6) and is made in the form of a grid composed of vertical bars (8). The vertical bars (8) make up cells (9), interconnected with each other. Lower portions of the bars (8) of the froth retainer (7), contiguous with the tray (6), are made solid, whereas the cells (9) of the grid communicate with one another through perforations made in the upper portions of the bars (8) of the froth retainer (7).