A micromixer includes: a first channel plate where a first channel and a plurality of first branch channels are each formed by a non-through groove in a front surface, and a first confluence channel is formed by a non-through groove in a rear surface, and includes a first communication channel that communicates the first branch channels with the first confluence channel; a first lid plate that covers the front surface; a second channel plate where a second confluence channel is formed by a non-through groove in the front surface, and a second channel and a plurality of second branch each formed by a non-through groove in the rear surface, and includes a second communication channel that communicates the second branch channels with the second confluence channel; and a second lid plate that covers the rear surface of the second channel plate.

A micromixer includes: a first channel plate where a first channel and a plurality of first branch channels are each formed by a non-through groove in a front surface, and a first confluence channel is formed by a non-through groove in a rear surface, and includes a first communication channel that communicates the first branch channels with the first confluence channel; a first lid plate that covers the front surface; a second channel plate where a second confluence channel is formed by a non-through groove in the front surface, and a second channel and a plurality of second branch each formed by a non-through groove in the rear surface, and includes a second communication channel that communicates the second branch channels with the second confluence channel; and a second lid plate that covers the rear surface of the second channel plate.

An inlet assembly for an aftertreatment system includes an inlet portion that receives a flow of exhaust gases, and a diffuser plate. The diffuser plate includes a body including a first section disposed in front of a first DOC. The first section defines a number of first holes having a first diameter to direct exhaust gases towards the first DOC. The body also includes a second section disposed in front of a second DOC. The second DOC is disposed adjacent to the first DOC in a parallel configuration. The second section defines a number of second holes and an elliptical opening. Each of the number of second holes has a second diameter that is different from the first diameter. The number of second holes and the elliptical opening direct exhaust gases towards the second DOC.

An inlet assembly for an aftertreatment system includes an inlet portion that receives a flow of exhaust gases, and a diffuser plate. The diffuser plate includes a body including a first section disposed in front of a first DOC. The first section defines a number of first holes having a first diameter to direct exhaust gases towards the first DOC. The body also includes a second section disposed in front of a second DOC. The second DOC is disposed adjacent to the first DOC in a parallel configuration. The second section defines a number of second holes and an elliptical opening. Each of the number of second holes has a second diameter that is different from the first diameter. The number of second holes and the elliptical opening direct exhaust gases towards the second DOC.

A microchannel chip (1) includes: a first channel (201); a reagent holder (230); a gas inlet (210) communicating with the first channel; a lid (50) closing the gas inlet; and a second channel (202) provided downstream of the first channel. A specimen holder (240) is provided downstream of the reagent holder (230). When the lid (50) closes the gas inlet (210), gas is supplied to the first channel (201) and pushes out the reagent downstream from the reagent holder (230). Thus, the pushed-out reagent merges with a specimen in the second channel (202).

A microchannel chip (1) includes: a first channel (201); a reagent holder (230); a gas inlet (210) communicating with the first channel; a lid (50) closing the gas inlet; and a second channel (202) provided downstream of the first channel. A specimen holder (240) is provided downstream of the reagent holder (230). When the lid (50) closes the gas inlet (210), gas is supplied to the first channel (201) and pushes out the reagent downstream from the reagent holder (230). Thus, the pushed-out reagent merges with a specimen in the second channel (202).

An intermixer or mixing device with frame structure and suspended bluff body array for use in a stationary (e.g., non-auto) SCR catalyst environment to reduce RMS levels of a mix of NO.sub.x pollutant and reduction reagent. SCR reactor apparatus with SCR catalyst module block supported on the intermixer. The SCR reactor apparatus works in an SCR reactor assembly having the SCR reactor apparatus at a first SCR1 layer plus a downstream SCR2 layer. The reduced RMS level of the mix coming from the SCR1 layer is readily able to be treated by the SCR2 layer. An SCR system features the SCR reactor assembly and a combustion source such as a coal-fired plant. Methods of assembly and operating each of the mixing device, SCR reactor apparatus, assembly and system are also featured.

An intermixer or mixing device with frame structure and suspended bluff body array for use in a stationary (e.g., non-auto) SCR catalyst environment to reduce RMS levels of a mix of NO.sub.x pollutant and reduction reagent. SCR reactor apparatus with SCR catalyst module block supported on the intermixer. The SCR reactor apparatus works in an SCR reactor assembly having the SCR reactor apparatus at a first SCR1 layer plus a downstream SCR2 layer. The reduced RMS level of the mix coming from the SCR1 layer is readily able to be treated by the SCR2 layer. An SCR system features the SCR reactor assembly and a combustion source such as a coal-fired plant. Methods of assembly and operating each of the mixing device, SCR reactor apparatus, assembly and system are also featured.

A liquid polymer dosing and mixing chamber and pump having a hollow chamber, a blending reactor, a progressive cavity pump, a mixing cup, a submersible actuator, and an aging cup within the hollow chamber adapted to create doses, via the progressive cavity pump, of a first substance and to mix it with one or more substances introduced into the blending reactor via one or more inlets.

A dilution device may include a first component and a second component. The first component may define a groove including an inlet portion and an outlet portion. The second component may define an inlet in fluid communication with the inlet portion of the first component and an outlet in fluid communication with the outlet portion of the first component. Relative rotation between the first component and the second component may cause relative movement between the outlet and the outlet portion that changes the effective length of the groove fluidly coupling the inlet and the outlet of the second component. The cross-sectional area of the groove may vary along a length of the groove to provide different flow characteristics depending on the effective length of the groove.