A static mixer includes a tubular body having a sidewall with an upstream end, a downstream end opposite the upstream end, and an inner surface. The upstream end has a surface defining an upstream opening into the body. The downstream end has a surface defining a downstream opening exiting the body. The upstream opening, the downstream opening, and inner surface define a passageway through the body for transport of a first fluid therethrough. A primary fin may depend from the inner surface of the body and into the passageway. The primary fin may have a curved fin with a flow surface. A secondary fin may extend into the passageway adjacent to the primary fin, the secondary fin may have a curved flow surface that curves opposite to the flow surface of the primary fin. The secondary fin may be offset upstream or downstream from the primary fin.

A mixer for an exhaust system of an internal combustion engine, for mixing a reactant with an exhaust gas flow, includes guide blade portions, fold webs and spacer webs. The guide blade portions are provided as guide blade pairs including a first blade portion connected to a second guide blade portion by at least one of the fold webs and folded at the at least one of the fold webs such that the first blade portion is disposed extending adjacent to and spaced from the second guide blade portion. Each of the guide blade pairs is connected to at least one adjacent guide blade pair by at least one of the spacer webs. The fold webs are disposed centrally and located adjacent to each other in an annular pattern of adjacent fold webs and the spacer webs are disposed peripherally spaced apart from each other about a circumference of the mixer.

A water treatment system (1) for a reservoir (3) of water (5) including a mixing unit (2) located outside of the reservoir (3) and in an overall flow path of water from the reservoir (3) to and through the mixing unit (2) and back into the reservoir water (5). The mixing unit (2) is operable in three disinfectant modes that selectively add (a) chlorine, (b) ammonia, or (c) a blended mixture of chlorine and ammonia forming chloramines into the water returning to the reservoir (3). The mixing unit (2) also has hard and soft flush modes. In the hard flush mode, water (5) from the reservoir (3) is continually moved to flush through the mixing unit (2) and back to the reservoir (3). In the soft flush mode, the incoming hard water (5) from the reservoir (3) is softened to remove calcium and other minerals before passing through the mixing unit (2) and back to the reservoir (3) to reduce the undesirable build up of mineral deposits in the mixing unit (2).

The present invention relates to a static mixer (9) for installation in a fluid line, in particular exhaust line (5) of a combustion engine (1), with an annular body (10) comprising at least one blade row (11) with a plurality of guide blades (12) standing away from the annular body (10) to the inside. A cost-effective producibility is obtained when the annular body (10) in the circumferential direction (13) consists of at least two part bodies (14), when part bodies (14) adjacent in the circumferential direction (13) are fastened to one another and when each part body (14) comprises a plurality of guide blades (12).

A carbon monoxide oxidation device for oxidizing carbon monoxide contained in a hydrogen rich reformat gas includes a gas stream perturbation device designed as at least one propeller-shaped plate with a plate portion having a surface facing the gas stream and at least one blade which is connected to the plate portion and has a leading edge and an effluent edge, wherein a surface defined between leading edge and effluent edge is inclined in relation to the surface of the plate portion with a predetermined blade inclination angle, thereby defining at least one opening in the plate.

A mixer assembly unit, especially for an exhaust system of an internal combustion engine of a vehicle, includes a mixer body (48a) with an incoming flow side (58a) and with an outflow side (60a) and with a plurality of flow deflection elements (62b). A carrier area (24a) is provided radially outwards in relation to a mixer longitudinal axis (L) at the mixer body (48a). The carrier area (24a) has an exhaust gas guide element connection area (72a) for permanent connection to a preferably tubular exhaust gas guide element (16a). Radially outside of the exhaust gas guide element connection area (72a), a flange coupling section (88a) couples with a flange coupling section (98a) of another exhaust gas guide element (14a).

An exhaust system includes a mixer assembly unit (26a) with a mixer body (48a) with an incoming flow side (58a) and with an outflow side (60a) and with a plate shaped carrier element (24a) with a radially outward carrier element body (44a). The mixer body includes a plurality of flow deflection elements (62a) and a holding area (70a). The carrier element includes a counter-holding area (46a) connected in substance to a holding area. The mixer assembly unit is arranged in a junction area of two tubular exhaust gas guide elements (14a, 16a). The exhaust gas guide elements include flange shaped coupling sections. The carrier element body is arranged between the flange shaped coupling sections of the exhaust gas guide elements. A coupling element engages the flange shaped coupling sections and extends over the coupling sections on axial sides oriented facing away from one another radially inwards.

An exhaust gas purification device including: a spray nozzle provided in an exhaust pipe of an engine; a mixer provided downstream of the spray nozzle in a flow direction of exhaust gas; and a catalyst reactor provided downstream of the mixer. The exhaust gas purification device is configured to spray a reducing agent from the urea water spray nozzle to the exhaust gas from the engine, to mix the reducing agent with the exhaust gas in the mixer, and to reduce nitrogen oxides in the exhaust gas using the catalyst reactor. The mixer includes a cylindrical body and a plurality of fins arranged in the cylindrical body radially outward with respect to the axis of the cylindrical body. The upstream portion of each fin is shaped to provide a cutoff portion.

The invention pertains to a spray/gas mixer, comprising: a main body having a circumferential wall with a first longitudinal axis (A) and extending from a first end to a second end, the first end defining an inlet opening, the second end defining an outlet opening; a divider baffle inside the interior; a swirl duct within the interior along a second longitudinal axis (B), having one 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 arrangement. The swirl promoting means is arranged between the divider baffle and the restrictor arrangement, such that gas passing through the swirl promoting means is swirled around the first longitudinal axis (A) before passing through the restrictor. The restrictor arrangement 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.

The exhaust gas stirring device comprises a cylindrical frame on an inner surface of a flow path member forming an exhaust flow path; supporting parts arranged to radially reach across the frame; a shielding part shielding a central axis of the frame and its circumference in the axis direction of the frame. One of the supporting parts comprises a pair of first skeletons extending radially outwardly from the central axis of the frame. The frame and the supporting parts are configured by assembling assembling members. One of the assembling members comprises the pair of first skeletons, and second skeletons respectively extending in an arc shape from one end of each of the first skeletons and constituting a part of the frame. Each of the first skeletons and the second skeletons in the assembling members comprises a vane part formed to protrude respectively from each of the first and second skeletons.