Methods and systems are provided for an exhaust gas mixer. In one example, a system may comprise an outer annular portion exterior to an exhaust pipe and an inner annular portion interior to the exhaust pipe, where the outer annular portion comprises a spiral fin extending around the exhaust pipe in a downstream direction.

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.

A mixing reactor for precipitating nanoparticles by mixing a precursor fluid with a second fluid at a higher temperature than the precursor fluid. The reactor comprises: a first fluid conduit with an inlet region configured to receive a flow of the precursor fluid, and an outlet region configured to output a mixed flow; and a second fluid conduit configured to receive a flow of the second fluid. The second fluid conduit extends into the first fluid conduit in a direction substantially perpendicular to the flow within the first fluid conduit, and has an opening for introducing the second fluid into the first fluid conduit. Related processes for producing nanoparticles are disclosed.

A system for printing biomaterials can include a mixer having a longitudinal axis. The mixer can define a flow channel that extends along the longitudinal axis. The mixer can have at least one inlet configured to receive a first printable biomaterial and a second printable biomaterial and an outlet spaced from the inlet along the longitudinal axis. One or more mixing elements positioned within the flow channel between the inlet(s) and the outlet of the mixer. The mixing element(s) can be configured to control a spatial distribution of the first and second printable biomaterials across and along the longitudinal axis.

The present disclosure relates to a mixer having a mixer housing which encloses a mixing chamber, an input part which can be connected to the mixer housing and has at least two input openings for the components to be mixed, and a mixing element, at least some sections of which extend into the mixing chamber, wherein each of the input openings is flow-connected to the mixing chamber via at least one input duct, wherein there is also in the input part at least one compensation duct which connects the input openings to each other, and/or at least one holding chamber is provided in the mixing element.

The present disclosure relates to a mixer having a mixer housing which encloses a mixing chamber, an input part which can be connected to the mixer housing and has at least two input openings for the components to be mixed, and a mixing element, at least some sections of which extend into the mixing chamber, wherein each of the input openings is flow-connected to the mixing chamber via at least one input duct, wherein there is also in the input part at least one compensation duct which connects the input openings to each other, and/or at least one holding chamber is provided in the mixing element.

A device for introducing and entraining a second fluid into a first fluid includes a Venturi device, an output tube, and a static mixer. The static mixer is shaped and dimensioned to slide and fit into the output tube and the output tube with the inserted static mixer is removably attached to an output end of the Venturi device. The static mixer includes a tubular component having an integrated gasket at a first end and fins extending radially from an inner surface of the tubular component and twisting around a central axis of the tubular component.

A device for introducing and entraining a second fluid into a first fluid includes a Venturi device, an output tube, and a static mixer. The static mixer is shaped and dimensioned to slide and fit into the output tube and the output tube with the inserted static mixer is removably attached to an output end of the Venturi device. The static mixer includes a tubular component having an integrated gasket at a first end and fins extending radially from an inner surface of the tubular component and twisting around a central axis of the tubular component.

The present invention relates to articles comprising a plurality of molded hollow parts having different central axis through the hollow elements further having passages in walls of the hollow parts transverse to the central axis of the hollow parts. The present invention also relates to methods of applying two part curable materials to substrates using the molded parts of the invention as mixing elements.

Unit for reduction of exhaust gases for an IC engine. The unit has a cylindrical housing with gas inlet and outlet openings and injector for a reducing substance. A helicoid is coaxially arranged inside the housing. A channel conveys the exhaust gases, has a substantially quadrangular cross-section, and helicoidally develops inside the unit. The helix is generated by the intersection between the inner surface of the housing and the helicoid has an inclination angle () relative to planes perpendicular to the generatrices of the cylindrical housing ranging from 0 to 30. The unit includes a coaxial stiffening and stabilization sleeve located at the center of the helicoid passing axially throughout the helicoid and axially over a length at least equal to the axial length of the helicoid. The sleeve cooperates with the inner surface of the housing and with the opposite surfaces of the helicoid to define the helicoidal channel.