A lattice board is obliquely arranged in a bent portion halfway in an exhaust pipe where exhaust gas flows curvedly so as to bisect an angle made by inflow and outflow directions the exhaust gas entered upstream of and discharged downstream of the bent portion, respectively. An injector is arranged in the outflow direction of the exhaust gas to inject urea water to an entry side of the lattice board such that flow passage walls of the lattice board on which hit is the exhaust gas from upstream has rear surfaces on which hit is a spray of urea water from the injector.

An exhaust purification system for a ship includes a main path in communication with the outside and a bypass path branched from an intermediate portion of the main path, each serving as a discharge path for an engine installed in the ship. The main path and the bypass path are provided with and opened and closed by respective fluid operated switching valves of a normally open type.

A mixer assembly of a vehicle exhaust system includes a base tube or pipe section and a plurality of mixing or stirring blades that sequentially engage notches formed in an end or edge portion of the base tube section and interconnect with each other to form a static blade assembly. Each blade of the plurality of mixing blades spans across the interior volume of the base tube section and includes a tab or attachment feature at each of the opposing ends of the respective blade that engages notches on opposing sides of the base tube section. The tabs of the plurality of mixing blades may be coupled with the notches in a manner that prevents disengagement and provides no weld surfaces at an interior volume of the base tube section.

An object of this invention is to provide an exhaust gas purification device with which a decrease in reduction (denitrification) efficiency can be reduced. An exhaust gas purification device of this invention for a ship 1 includes: a reducing agent injector 61 of a reducing agent supply device supplying a reducing agent to an exhaust gas passing through an exhaust pipe of an engine 21 to be mounted in the ship; an exhaust mixer 62 mixing the exhaust gas and the reducing agent in a location downstream of the reducing agent injector 61 in an exhaust gas traveling direction; and selective catalytic reduction devices 34, 35 facilitating reduction of NOx in the exhaust gas of the engine 21 in a location downstream of the exhaust mixer 62 in the exhaust gas traveling direction. Multiple reducing agent injectors 61 are provided, and respectively have injection ports arranged at equal intervals along a circumferential direction of the exhaust pipe.

An exhaust mixer includes, a plurality of outwardly oriented vanes having planar surfaces, and a plurality of inwardly oriented vanes alternately positioned perimetrically between the plurality of outwardly oriented vanes, and a core flow area defined inwardly of inner most portions of the plurality of inwardly oriented vanes, the exhaust mixer being configured such that a minority of the total flow through the exhaust mixer travels through the core flow area when the exhaust mixer is employed during a mixing operation.

There is provided an insert (110) for a static mixer (100), wherein the static mixer includes the insert and a tube (102). In use, the insert is within the tube. The insert has a first surface (120) including a first leading edge (122) and a first trailing edge (124) joined by a first longitudinal edge (126) and a second longitudinal edge (128). The first surface has a first concave surface portion (130) at or adjacent the first leading edge and a first convex surface portion (132) at or adjacent the first trailing edge.

An exhaust gas purification device (1) including: a spray nozzle (2) provided in an exhaust pipe of an engine (18); a mixer (11) provided downstream of the spray nozzle in a flow direction of exhaust gas; and a catalyst reactor (12) 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 (21) and a plurality of fins (22) 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 (221).

Embodiments of the present invention relate to a mixing apparatus. Particularly, embodiments of the present invention provide a mixing apparatus for mixing fluid components such as phosgene and amine during a highly reactive chemical reaction. One embodiment provides a mixing conduit comprising a cylindrical sidewall defining an inner volume, wherein one or more jets are formed through the cylindrical sidewalls and connect to the inner volume and one or more flow obstructions disposed in the inner volume, wherein each flow obstruction is positioned upstream from an associated aperture.

A mixer for mixing an exhaust flow in an exhaust pipe includes a tubular housing having a first end, a second end and a center portion positioned between the ends. The center portion has a reduced size in relation to at least one of the first and second ends. The housing includes circumferentially spaced apart apertures extending through the center portion. A mixing element includes a body having a first peripheral portion and a second peripheral portion. The first peripheral portion is fixed to the center portion at a location adjacent to one of the apertures. The second peripheral portion is fixed to the center portion at a location adjacent to another one of the apertures.

A mixer assembly unit, especially for an exhaust system of an internal combustion engine of a vehicle, includes a mixer body (48) with an incoming flow side (58) and with an outgoing flow side (60); and a carrier element (24) with a carrier element body (44) enclosing the mixer body (48) radially on an outside in relation to a mixer longitudinal axis. The mixer body (48) includes a plurality of flow deflection elements (62) and at least one holding area (70). The carrier element (24) includes a counter holding area (46) in association with a holding area (70). The counter holding area (46) is connected in substance to the holding area (70). The counter holding area (46) overlaps the holding area (70) at least partly radially on a side oriented in a direction of the outgoing flow side (60) of the mixer body (48).