An apparatus for mixing an exhaust gas stream with an additive, in particular a reducing agent. The apparatus has a mixing pipe for mixing the exhaust gas stream with the additive. The apparatus has a first deflection pipe for deflecting the exhaust gas stream, in particular by about 180. The exhaust gas stream can be fed to the mixing pipe on the end side via the first deflection pipe. The first deflection pipe has a fastening region for attaching an additive injector to the first deflection pipe. The first deflection pipe has a swirl generating wall region arranged on the end side with respect to the mixing pipe and is configured to impart a swirl to the exhaust gas stream.

A mixing apparatus for mixing a precursor substance of a reducing agent with exhaust gas, having a housing that provides a mixing chamber and a silencer. The housing inlet side has an inlet connection for exhaust gas and an outlet side having an outlet connection for reducing agent intermixed with the exhaust gas to be discharged. Longitudinal axes of the inlet and outlet connections are offset and parallel relative to one another. An introduction device introduces a precursor substance of the reducing agent and is positioned at the inlet side in a region of the outlet connection longitudinal axis. A length of the housing between the inlet and outlet side at least 1.9 to 7 times a diameter of the inlet connection. A width of the housing is maximally 3 times the diameter of the inlet connection.

A duct for a fuel cell module includes an upper duct hood having an inlet configured to receive reactant gas from a supply duct, the upper duct hood defining a first tapered portion and a second tapered portion. The duct further includes a lower duct hood fluidly coupled to the upper duct hood, the lower duct hood defining at least one outlet. In a side view, the second tapered portion is tapered inwardly in a downstream direction. In a top view, the first tapered portion is tapered inwardly in a downstream direction, and the second tapered portion is tapered outwardly moving downstream.

An apparatus for aftertreatment of exhaust gas includes a housing an exhaust inlet, a first flow guide to guide at least part of exhaust gas to a first direction to form a first direction flow, and a reactant inlet for dispensing reactant to the first direction flow in an inner cavity to mix with the exhaust gas to provide a mixed exhaust gas. A second flow guide guides at least a part of the first direction flow to a second direction to form a second direction flow opposite to the first direction, and guide the second direction flow to a third direction to form a third direction flow downstream to the second direction and parallel to the first direction. An exhaust outlet exits output exhaust gas from the inner cavity; mixing of the reactant and the exhaust gas occurring within the first, second and third direction flow.

A system for treating alkaline wastewater includes a first conduit and a second conduit. The first conduit has a first conduit inlet end for receiving alkaline wastewater, a first conduit outlet end for discharging primary treated wastewater, a first conduit upstream portion adjacent the first conduit inlet end, and a first conduit downstream portion adjacent the first conduit outlet end. A first static mixer is in the first conduit. The second conduit has a second conduit inlet end in communication with the first conduit outlet end for receiving the primary treated wastewater, a second conduit outlet end for discharging secondary treated wastewater, a second conduit upstream portion adjacent the second conduit inlet end, and a second conduit downstream portion adjacent the second conduit outlet end. A second static mixer is in the second conduit. A citric acid source is in communication with the first conduit and the second conduit.

Some embodiments relate to a device for performing continuous emulsion of two immiscible fluids. The device includes: a first microsystem including at least two micro-channels for intake of each fluid, of different respective cross sections S1 and S2, which are offset and face each other along a central intake axis A; at least two micro-channels for output of the emulsion from the device once the emulsion is formed; and an area where the intake and output micro-channels intersect, the area being capable of generating an interface between the fluids and forming a pre-emulsion flowing in the output micro-channels until the emulsion is complete. The device also includes at least one singularity capable of destabilizing the interfaces between the fluids in the pre-emulsion.

An apparatus for aftertreatment of exhaust gas including a housing having a longitudinal axis that extends between a first end and a second end of the housing; an exhaust inlet being positioned at a portion of the first end of the housing for entering exhaust gas flow into the interior of the housing; a first substrate being positioned within the interior of the housing downstream to the exhaust inlet, wherein the exhaust gas flow being configured to flow through the first substrate in direction of the longitudinal axis; mixer arrangement being positioned within the interior of the housing downstream to the first substrate and including: first flow guide arrangement configured to guide the exhaust gas flow to rotating and advancing gas flow in direction of a crosswise axis perpendicular to the longitudinal axis; a reactant inlet for dispensing reactant to the rotating and advancing gas flow, the reactant configured to mix with the exhaust gas; and second flow guide arrangement configured to guide the rotating and advancing mixed gas flow in direction of the longitudinal axis as a mixed exhaust gas flow; and a second substrate being positioned within the interior of the housing downstream to the mixer arrangement, wherein the mixed exhaust gas flow being configured to flow through the second substrate in direction of the longitudinal axis.

A washing machine includes a cabinet; an outer basket in the cabinet and configured to contain wash water; an inner basket in the outer basket and configured to accommodate laundry; a water supply valve unit in the cabinet and connected to an external water supply source to receive wash water; a cabinet cover on an upper side of the cabinet and having an input hole for the laundry; and a micro-bubble generator configured to receive wash water from the water supply valve unit, generate micro-bubbles, and supply the micro-bubbles to a washing space. The micro-bubble generator includes a nozzle unit at or near the input hole and configured to generate micro-bubbles by receive wash water in which gas is dissolved or mixed and discharge wash water having the micro-bubbles therein into the inner basket after the micro-bubbles are generated.

A grit box to separate particulate matter from an influent stream. The grit box has an upper portion and a lower portion with a deflection plate separating the upper portion from the lower portion. It includes a hopper for accumulation of particulate matter settled from the influent stream. The hopper has a drainage pipe and a valve therebetween to control passage of material from the grit box into the drainage pipe. A mechanism delivers the influent stream at a predetermined and substantially constant flow rate. The influent stream is separated into two or more streams which are recombined under pressure in the grit box in a turbulent mixing zone. The fluid rise rate in the grit box is lower than the settling rate of the particulate matter to be separated from the influent stream.

Herein are provided tools and processes for extracting oil from subterranean formation. The processes can include lightening the oil in the formation prior to extraction by the addition of a nanogas solution. The tools include injectors for the formation of the nanogas solution within the subterranean formation.