A vane swirl mixer for exhaust aftertreatment includes: a vane swirl mixer inlet; a vane swirl mixer outlet; a first flow device including: a Venturi body; a plurality of upstream vanes positioned within the Venturi body; a plurality of upstream vane apertures interspaced between the plurality of upstream vanes; a plurality of downstream vanes positioned within the Venturi body; and a plurality of downstream vane apertures interspaced between the plurality of downstream vanes. At least one of the upstream vane hub and the downstream vane hub is radially offset from a Venturi center axis, thereby causing individual ones of the plurality of vanes coupled to the radially offset vane hub to differ in their geometry.

A contacting device and method are presented for the collection, contacting, and distribution of fluids between particulate beds of a downflow vessel, which may operate in co-current flow. By one approach, the contacting device includes a liquid collection tray, a mixing channel in fluid communication with the liquid collection tray, and a liquid distribution zone.

An exhaust line includes a housing having a wall with an opening and a baffle disposed within the opening. In certain embodiments, the exhaust line includes a divider between the wall and baffle that partially defines a mixing chamber for receiving an exhaust and a reducing agent, and partially defines a bypass chamber for receiving another portion of the exhaust. The divider defines an inlet and outlet facing respective upstream and downstream ends. The divider transfers heat from exhaust passing through the bypass chamber to the reducing agent inside the mixing chamber. In other embodiments, the baffle partially defines a first passageway substantially parallel to and offset from a center axis for delivering a portion of the exhaust to the mixing chamber, and a ramped surface partially defining a second passageway transverse to the first passageway for delivering another portion of the exhaust to the mixing chamber.

An exhaust line includes a housing having a wall with an opening and a baffle disposed within the opening. In certain embodiments, the exhaust line includes a divider between the wall and baffle that partially defines a mixing chamber for receiving an exhaust and a reducing agent, and partially defines a bypass chamber for receiving another portion of the exhaust. The divider defines an inlet and outlet facing respective upstream and downstream ends. The divider transfers heat from exhaust passing through the bypass chamber to the reducing agent inside the mixing chamber. In other embodiments, the baffle partially defines a first passageway substantially parallel to and offset from a center axis for delivering a portion of the exhaust to the mixing chamber, and a ramped surface partially defining a second passageway transverse to the first passageway for delivering another portion of the exhaust to the mixing chamber.

A contacting device and method are presented for the collection, contacting, and distribution of fluids between particulate beds of a downflow vessel, which may operate in co-current flow. By one approach, the contacting device includes a liquid collection tray, a mixing channel in fluid communication with the liquid collection tray, and a liquid distribution zone

A mixing device may define a mixing chamber including a vortex mixing portion, a primary gas path along which a first gas stream moves to the vortex mixing portion, and a secondary gas path along which a second gas stream moves to the vortex mixing portion. The mixing device may have a mixer body, an outer gas guide positioned in the mixer body to guide the second gas stream to the vortex mixing portion, and an inner gas guide at least partially positioned in the mixer body to guide the first gas stream to the vortex mixing portion. A portion of the inner gas guide may be positioned in the outer gas guide to form an annular gap between the gas guides to define the secondary gas path about the primary gas path to create a vortex of the first and second gas streams in the vortex mixing portion.

A spray assembly for dispensing a mixture is provided. The spray assembly includes a connector configured for operable engagement with a first and second source of component and a source of pressurized fluid, and a tip operably connected to the connector. The tip includes an opening and defines a mixing chamber between the connector and the opening of the tip, and an insert member configured to be received in the mixing chamber. The insert member includes a plurality of radially extending slots on at least one end of the insert. The plurality of radially extending slots is configured to mix the first and second components prior to the mixture exiting the opening in the tip.

This disclosure includes disinfection reactors and processes for the disinfection of water. Some disinfection reactors include a body that defines an inlet, an outlet, and a spiral flow path between the inlet and the outlet, in which the body is configured to receive water and a disinfectant at the inlet such that the water is exposed to the disinfectant as the water flows through the spiral flow path. Also disclosed are processes for disinfecting water in such disinfection reactors.

A spray assembly for dispensing a mixture is provided. The spray assembly includes a connector configured for operable engagement with a first and second source of component and a source of pressurized fluid, and a tip operably connected to the connector. The tip includes an opening and defines a mixing chamber between the connector and the opening of the tip, and an insert member configured to be received in the mixing chamber. The insert member includes a plurality of radially extending slots on at least one end of the insert. The plurality of radially extending slots is configured to mix the first and second components prior to the mixture exiting the opening in the tip.

A method and apparatus for mixing at least two fluids is provided. The method involves using means for providing a spiral stream of a first fluid and a second fluid is injected directly inside the first fluid to achieve effective mixing.