An aftertreatment system comprises: a housing, a SCR system disposed in the housing. A mixer is disposed upstream of the SCR system and includes: a hub, a tubular member disposed circumferentially around the hub and defining a reductant entry port, and plurality of vanes extending from the hub to the tubular member such that openings are defined between adjacent vanes. The plurality of vanes swirl the exhaust gas in a circumferential direction. A reductant injector is disposed on the housing upstream of the SCR system along a transverse axis and configured to insert a reductant into the exhaust gas flowing through the housing through the reductant entry port. The reductant is inserted at a non-zero angle with respect to the transverse axis opposite the circumferential direction to achieve virtual interception. A mixer central axis is radially offset with respect to a housing central axis of the housing.

The invention relates to a facility for treatment of an aqueous effluent by hydrothermal oxidation, which comprises: a reactor comprising a tube in which the aqueous effluent to be treated flows, the tube of the reactor having a plurality of bends formed by oxidant-injection devices, each oxidant-injection device comprising: a reactor part (32) forming an effluent-circulation channel (35) bent at an angle in which a flow of aqueous effluent can circulate, and an injector part (33) comprising a first opening (49) suitable for being connected to a source of oxidant located outside the effluent-circulation channel (35) and a second opening (50) located in the effluent-circulation channel (35), and a source of oxidant connected to the injector part so as to inject the pressurised oxidant into the flow of aqueous effluent to be treated.

One fluid is mixed into another to provide a high degree of surface contact between the fluids. In operation, the first fluid flows into an aerodynamic perforated vane mixing apparatus in a laminar condition, and is swirled within the mixing apparatus, the second fluid contacts the first fluid, and then the mixture flows through a scalloped device with a regulated venturi expander. A system for mixing one fluid into another and rotatably shearing and homogenizing material is also disclosed. One or more aerodynamic anomalies are employed to provide complete mixing of multiple fluids one or more of which may be a viscous laminar flow fluid. The shearing may be performed by a scissor rotated by a hydraulic, pneumatic, or electric motor. The sheared material may include, for example, paraffin located within crude oil. If desired, the second fluid may be introduced by a multi-physics fluid delivery device.

An exhaust purification system for a ship includes a main path in communication with the outside and a bypass path branched from an intermediate portion of the main path, each serving as a discharge path for an engine installed in the ship. The main path and the bypass path are provided with and opened and closed by respective fluid operated switching valves of a normally open type.

Disclosed is a swirl-type liquid raw material in-line static mixer. In an apparatus, a pipe body extends along its central axis; a first raw material inlet is arranged at a top end of the pipe body and is collinear with the central axis; a second raw material inlet is arranged on a side wall of the pipe body and is perpendicular to the central axis; a first swirl pipe is arranged in the pipe body and connects with the first raw material inlet; a second swirl pipe is arranged in the pipe body and connects with the first swirl pipe and the second raw material inlet; a third swirl pipe is arranged in the pipe body and connects with the second swirl pipe; an outlet is arranged at a bottom end of the pipe body and connects with the third swirl pipe.

Provided is an ultra fine bubble production device capable of causing a liquid current to flow in a helical manner without reducing a flow rate of the liquid current while reducing the number of components. The ultra fine bubble production device includes the pipe, the compression device, and the gas bubble production medium. The gas bubble production medium is formed of a carbon-based porous material, the pipe has the side surface having a cylindrical shape and the end surfaces having a circular shape, the liquid current inflow port is provided on the side surface, the cylindrical guide member is arranged so as to be connected to the liquid current inflow port, and the guide member has the guide groove having a helical shape.

A fluid mixing device (10) for use in chemical reactions involving two or more immiscible fluid phases. It mixes the reactants and prevents phase separation, particularly in pipe bends. The device (10) for mixing fluids flowing through a pipe (16), comprises a plate (12) having a flowpath (14) therethrough and two or more tabs (20) extending from the plate into the flowpath at an angle (24) from the plane (22) of the plate. The tabs (20) are formed by first folds (32) in the plate, at least two of the tabs (20A) having a second fold (26) therein, the tabs and first and second folds being arranged to produce two counter-rotating vortices (30) in the fluids passing through the pipe. The device has a plane of symmetry (28) perpendicular to the plane (22) of the plate (12).

A passive blender for introducing a mixer gas into a grid gas pipeline. The blender has an input section extending from an input inlet from which grid gas enters the blender to an input outlet along a longitudinal axis of the blender, wherein the input section reduces in cross-section from the input inlet to the input outlet and the longitudinal axis of the blender. The blender also has a mixer extending from a mixer inlet to a mixer outlet along the longitudinal axis of the blender, wherein the mixer inlet is positioned immediately adjacent the input outlet. The blender also has an output section extending from an outlet inlet to an output outlet along the longitudinal axis of the blender, wherein the output inlet is positioned immediately adjacent the mixer outlet.

Provided is an ultra-fine bubble generator capable of efficiently generating ultra-fine bubbles in fluid. The generator is a fluid activating device including: a shaft in a cylindrical columnar shape; a tubular body provided with a hollow part to accommodate the shaft with a predetermined interval between an inner peripheral surface of the hollow part and an outer peripheral surface of the shaft; and multiple blades that are provided between the outer peripheral surface of the shaft and an inner peripheral surface of the tubular body while forming a flow path extending spirally from one end of the tubular body toward another end of the tubular body, and that generate a turbulent flow in fluid flowing in the flow path, the tubular body having an inner peripheral surface provided with multiple ribs each composed of a ridge extending in an axial direction of the shaft.

A fluid mixer apparatus can include an annular ring defining a fluid flow path configured for a first fluid through the annular ring. The annular ring can include one or more fluid inlets circumferentially disposed on an exterior surface of the annular ring, the one or more fluid inlets configured to receive a second fluid different than the first fluid. The fluid mixer apparatus can include a central hub and a plurality of helical airfoils positioned inside the annular ring and connected to both of the annular ring and the central hub. In some examples, each helical airfoil of the plurality of helical airfoils can include: a plurality of perforations in fluid communication with the one or more fluid inlets to introduce the first fluid into the second fluid; and an airfoil surface perturbation positioned adjacent to or rearward of the plurality of perforations.