The contacting device for countercurrent contacting of fluid streams and having a first pair of intersecting grids of spaced-apart and parallel deflector blades and a second pair of intersecting grids of spaced-apart and parallel deflector blades. The deflector blades in each one of the grids are interleaved with the deflector blades in the paired intersecting grid and may have uncut side portions that join them together along a transverse strip where the deflector blades cross each other or adjacent opposed ends of the deflector blades and cut side portions that extend from the uncut side portions to the ends of the deflector blades. At least some of the deflector blades have directional tabs and associated openings to allow portions of the fluid streams to pass through the deflector blades to facilitate mixing of the fluid streams.

The contacting device for countercurrent contacting of fluid streams and having a first pair of intersecting grids of spaced-apart and parallel deflector blades and a second pair of intersecting grids of spaced-apart and parallel deflector blades. The deflector blades in each one of the grids are interleaved with the deflector blades in the paired intersecting grid and may have uncut side portions that join them together along a transverse strip where the deflector blades cross each other or adjacent opposed ends of the deflector blades and cut side portions that extend from the uncut side portions to the ends of the deflector blades. At least some of the deflector blades have directional tabs and associated openings to allow portions of the fluid streams to pass through the deflector blades to facilitate mixing of the fluid streams.

A spray/gas mixer includes a main body having a circumferential wall defining an inlet opening at one end and an outlet opening at another end; a divider baffle within the main body; a swirl duct having a first end adjacent to the wall and a second end extending to the divider baffle; an injector orifice at the first end of the swirl duct; a swirl promoting means; and a restrictor. The swirl promoting means is arranged between the divider baffle and the restrictor. Gas passing through the swirl promoting means is swirled around the first longitudinal axis (A) before passing through the restrictor. The restrictor is disposed between the swirl promoting means and the second end, forcing gas reaching it from an upstream side away from a peripheral region of the interior towards a center axis of the main body.

A static mixer for exhaust gas ducts of internal combustion engines includes an elongated hollow metal body having a shape which, relative to a symmetry axis, substantially corresponds to a solid of revolution defining at its inside a cavity having opposite bases, at least one of which has an axial opening, and a closed lateral wall connecting the opposite bases and having at least one radial opening over which a concave blade is arranged extending radially outward from a portion of the peripheral edge of the radial opening and surrounding a portion of the radial opening so as to define, in a first angular direction relative to the symmetry axis, a corresponding concave screen or spoon and, in a second, opposite direction, a mouth intended for the passage of gases and located substantially in front of the concave screen or spoon.

A mixer for mixing an exhaust gas flow with a fluid injected into an exhaust gas line comprises means for generating a swirl effecting a rotating flow and means for a radial displacement in the exhaust gas flow admixed with the fluid and flowing axially through the mixer. In this respect, the swirl generation means and the radial displacement means are arranged and designed such that, viewed over the cross-section of the mixer perpendicular to the axial exhaust gas flow, at least two separate swirl regions result which are built up via tangentially acting vane-like swirl elements and at least one respective radial displacement region results which is arranged between two separate swirl regions.

The device (1) for bringing a gas and a liquid into contact includes an enclosure (E), first means (5) for introducing into the enclosure and circulating therein a gas stream (G), second means (6) for introducing into the enclosure and circulating therein a liquid stream (L) that circulates inside the enclosure (E) in the same direction as the gas stream (G), and means (4A) for mixing the gas stream (G) and the liquid stream (L). These mixing means (4A) are positioned inside the enclosure (E) in the path of the gas stream and liquid stream and are capable of locally deflecting upward, and/or of locally causing to rise, at least one portion of the gas stream and liquid stream, so as to locally create turbulences in the gas stream and in the liquid stream.

The contacting device for countercurrent contacting of fluid streams and having a first pair of intersecting grids of spaced-apart and parallel deflector blades and a second pair of intersecting grids of spaced-apart and parallel deflector blades. The deflector blades in each one of the grids are interleaved with the deflector blades in the paired intersecting grid and may have uncut side portions that join them together along a transverse strip where the deflector blades cross each other or adjacent opposed ends of the deflector blades and cut side portions that extend from the uncut side portions to the ends of the deflector blades. At least some of the deflector blades have directional tabs and associated openings to allow portions of the fluid streams to pass through the deflector blades to facilitate mixing of the fluid streams.

A static mixing device subassembly that can be joined with other static mixing device subassemblies to form a static mixing device. The subassembly comprises a first pair of intersecting grids of spaced-apart and parallel deflector blades and a second pair of intersecting grids of spaced-apart and parallel deflector blades. The deflector blades in each one of the grids are interleaved with the deflector blades in the paired intersecting grid and have uncut side portions that join them together along a transverse strip where the deflector blades cross each other and cut side portions that extend from the uncut side portions to the ends of the deflector blades. Each of the deflector blades in one of the grids in each pair of grids has a bent portion that places segments of the deflector blade on opposite sides of the uncut portion in offset parallel planes. Some or all of the deflector blades in the other one of the grids in one of the pairs of grids has uncut ends that are interconnected with uncut ends of deflector blades in the other one of the grids in the other one of the pairs of grids along a reverse bend that aligns one of the pairs of grids with the other pair of grids.

A mixer device for an exhaust system of an internal combustion engine includes a tubular carrier (30) enclosing a mixer longitudinal axis (A) in a ring shape configuration and a mixer insert (28) carried at the carrier (30). The mixer insert (28) has a plurality of connection attachments (52, 54, 56) located at spaced locations from one another in relation to the mixer longitudinal axis (A) radially on the outside. The carrier (30) has a plurality of connection recesses (60, 62) for the permanent connection of the mixer insert (28) to the carrier (30).

An internal combustion engine exhaust system mixer device includes a bottom element (12) includes a downstream rear side (22) and a front side (44). The bottom element has a reactant introduction opening (31), open to a reactant receiving volume (46), and expands therefrom radially from the reactant introduction opening toward the front side. Exhaust gas passage ducts (58), arranged following one another in the circumferential direction about the opening axis (A), open to the reactant receiving volume. A swirl generation element (20) is connected to the bottom element and encloses the opening axis. A mixing volume (64) adjoins the reactant receiving volume in the direction of the opening axis and is formed in the swirl generation element. A plurality of exhaust gas passage openings (66), following one another in the circumferential direction, about the opening axis are provided in the swirl generation element.