A mixing conduit for use within an exhaust treatment system of a work vehicle. The mixing conduit is configured to receive engine exhaust and a mixture of engine exhaust and reductant. The mixing conduit includes an outer tube and an inner tube within the outer tube. Each tube extends lengthwise from upstream ends to downstream ends of the inner and outer tubes, respectively. The inner tube includes an exterior surface, and the outer tube includes an interior surface. The inner tube defines an inner flowpath within the inner tube. The outer tube and inner tube also define an outer flowpath radially between the exterior surface of the inner tube and the interior surface of the outer tube. The mixing conduit further includes one or more swirler vanes extending radially between the exterior surface of the inner tube and the interior surface of the outer tube and within the outer flowpath.

According to an embodiment of the present disclosure, an exhaust gas treatment apparatus may include: a preprocessor configured to primarily remove harmful substances from exhaust gas produced by combustion; and a postprocessor configured to further remove harmful substances from preprocessed gas, which is the exhaust gas from which the harmful substances have been primarily removed by the preprocessor, wherein the postprocessor may include a postprocessor housing having a preprocessed gas inlet through which the preprocessed gas is introduced and a postprocessed gas outlet through which postprocessed gas from which harmful substances have been further removed by the postprocessor is discharged and forming a flow path of the preprocessed gas therein, and a diffuser disposed adjacent to the preprocessed gas inlet and configured to diffuse the preprocessed gas introduced through the preprocessed gas inlet.

Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided. The methods involve contacting a first stream comprising NO and/or NO.sub.2 with a second stream comprising (ClO.sub.2).sup.0 to provide a third stream comprising NO and NO.sub.2 at a molar ratio of about 1:1; and contacting the third stream with a fourth stream comprising an aqueous metal hydroxide (MOH) solution to convert NO and NO.sub.2 to MNO.sub.2.

Disclosed is a system for mixing gases and liquids that includes a reactor vessel and an injection assembly. The reactor vessel including a liquid inlet which receives a predetermined amount of liquid and at least one gas inlet which receives a precise amount of a gas. The reactor vessel also includes means for creating cavitation or turbulence for mixing the gas and liquid to a desired gas concentration.

An engine and a double-swirl mixing device thereof are provided. The double-swirl mixing device includes a mixing tube configured to mix exhaust gas with urea, a tapered mixer including a tapered tube having an outlet end extending into the mixing tube, and a plurality of tapered swirl plates which are arranged along a circumferential direction on a side wall of the tapered tube, and a fan-type blade arranged at the outlet end of the tapered tube, and a diameter of an inlet end of the tapered tube is smaller than a diameter of the outlet end of the tapered tube.

A mixer apparatus for an exhaust gas aftertreatment system of a motor vehicle. The apparatus includes a housing having enveloping, first end, and second end walls. An injection opening for an exhaust gas aftertreatment agent is in the enveloping wall. An inlet opening is in the first end wall. The injection opening is configured for mounting a metering module. A rectilinear metering axis, which extends through the metering module and corresponds to an injection direction of exhaust gas aftertreatment agent injected into the housing, tangentially contacts, at a contact point, a theoretical cylinder, disposed in the housing, having a variable radius and a cylinder axis that is congruent with a central axis of the housing. A region of the metering axis extending from the injection opening to the contact point is located, with respect to inflowing exhaust gas, in the shelter of an opening-free region of the first end wall.

An exhaust system assembly including a catalyst housing, a catalyst core, and a swirler tube positioned inside the catalyst housing. The swirler tube has a plurality of openings that permit radial exhaust flow into an inner volume of the swirler tube from the catalyst housing. One end of the swirler tube has blades that extend inward and include oblique surfaces arranged at oblique angles relative to a centerline axis of the swirler tube. These blades induce a vortex in the exhaust gases exiting the first swirler tube end. The swirler tube is arranged inside the catalyst housing such that a sequential flow path is created where the exhaust gases flowing through the catalyst housing must first pass through the openings in the swirler tube and then by the blades at the first swirler tube end.

In one configuration, a hydroponic system for enriching a liquid with gas-bubbles is disclosed. The system may include at least one reservoir configured to temporarily store the gas-bubble enriched liquid. Each of the at least one reservoir may include an associated inlet port and an associated outlet port fluidically coupled with each other via a liquid-flow line. The system includes one or more pumps configured to cause movement of the liquid along the liquid-flow line, a gas supply feeding a gas (in one configuration, oxygen from a gas concentrator), and a gas-bubble generator provided on the liquid-flow line. The gas-bubble generator may be fluidically coupled to the gas supply to receive gas from the gas supply. The gas-bubble generator may be configured to generate a plurality of individual gas-bubbles of the gas received from the gas supply and mix with the liquid stream flowing via the gas-bubble generator.

A mixer assembly for a vehicle exhaust system includes a mixer shell defining an internal cavity, wherein the mixer shell includes an upstream end configured to receive exhaust gases and downstream end, and a reactor positioned within the internal cavity. The reactor has a reactor inlet configured to receive injected fluid and a reactor outlet that directs a mixture of exhaust gas and injected fluid into the internal cavity. An inlet baffle is mounted to the upstream end of the mixer shell. The inlet baffle includes at least one opening that directs exhaust gas into at least one exhaust gas inlet to the reactor and a plurality of bypass openings that direct exhaust gas to bypass entry into the reactor. The inlet baffle includes a crowned portion that curves away from the reactor to provide for an increased open area within the internal cavity between the inlet baffle and the reactor.

Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided. The methods involve contacting a first stream comprising NO and/or NO.sub.2 with a second stream comprising (ClO.sub.2).sup.0 to provide a third stream comprising NO and NO.sub.2 at a molar ratio of about 1:1; and contacting the third stream with a fourth stream comprising an aqueous metal hydroxide (MOH) solution to convert NO and NO.sub.2 to MNO.sub.2.