A diesel exhaust fluid (DEF) nozzle includes a first conduit, an outlet of the first conduit defining an inlet of a first mixing chamber; and a second conduit disposed around the first conduit, an outer surface of the first conduit and an inner surface of the second conduit defining a second flow path therebetween. A flow area of the second flow path decreases from an inlet of the second flow path to a throat, and increases from the throat to an outlet of the second flow path. The inner surface of the second conduit defines a peripheral wall of the first mixing chamber, and a peripheral wall of a second mixing chamber, the first flow path and the second flow path being in fluid communication with the second mixing chamber via the first mixing chamber.

A dilution nozzle assembly for attachment to a rooftop vent pipe for diluting and dispersing hazardous gases vented from the vent pipe includes an exhaust tube connected to the vent pipe and a venturi nozzle positioned in the exhaust tube for diluting and dispersing the hazardous gases vented from the vent pipe as they pass through the exhaust tube.

There is provided a loop flow type bubble generation nozzle capable of improving the bubble generation efficiency compared to conventional nozzles without reducing the bubble generation efficiency even when liquid containing impurities is used. A loop flow type bubble generation nozzle 10 includes a tubular bottomed member 1 having a circular cross section and a tubular member 2 which is fitted into the other end side of the bottomed member 1. A substantially cylindrical space surrounded by the bottomed member 1 and the tubular member 2 serves as a loop flow type gas-liquid stirring and mixing chamber 6. The tubular member 2 has, on the center thereof, an inflow hole 7 which is capable of allowing liquid and gas to flow therein, and a first jet hole 8a and a second jet hole 8b which are capable of jetting liquid and gas. The inflow hole 7 is formed in a tapered shape whose diameter continuously expands from the first jet hole 8a toward the loop flow type gas-liquid stirring and mixing chamber 6. A plurality of cut-away parts 7a are formed on an end face of the inflow hole 7, the end face facing the loop flow type gas-liquid stirring and mixing chamber 6.

A dilution nozzle assembly for attachment to a rooftop vent pipe for diluting and dispersing hazardous gases vented from the vent pipe includes an exhaust tube connected to the vent pipe and a venturi nozzle positioned in the exhaust tube for diluting and dispersing the hazardous gases vented from the vent pipe as they pass through the exhaust tube.

Gas-liquid injection apparatus, having a body, a liquid passage, a bypass passage, a gas inlet, a gas-liquid mixing cavity and a gas-liquid mixing passage, wherein the body includes an inlet end face and an outlet end face, and the liquid passage includes a liquid inlet that opens onto the inlet end face and a passage outlet that is arranged on the outlet end face, and includes a converging section and a throat section that are arranged in sequence downstream of the liquid inlet; one end of the bypass passage opens to the converging section, and the other end is connected to the gas-liquid mixing cavity, and the bypass passage allows liquid flowing in the liquid passage to bypass to the gas-liquid mixing cavity; the gas-liquid mixing cavity is located at the periphery of the liquid passage; the gas inlet opens onto the inlet end face.

A dilution nozzle assembly for attachment to a rooftop vent pipe for diluting and dispersing hazardous gases vented from the vent pipe includes an exhaust tube connected to the vent pipe and a venturi nozzle positioned in the exhaust tube for diluting and dispersing the hazardous gases vented from the vent pipe as they pass through the exhaust tube.

A dilution nozzle assembly for attachment to a rooftop vent pipe for diluting and dispersing hazardous gases vented from the vent pipe includes an exhaust tube connected to the vent pipe and a venturi nozzle positioned in the exhaust tube for diluting and dispersing the hazardous gases vented from the vent pipe as they pass through the exhaust tube.

A static mixer for mixing and/or activating at least one component is provided. The static mixer comprises a port for receiving a starting material containing at least the one component, a mixing chamber arranged downstream of the port, and an impact plate within the mixing chamber. A first nozzle is arranged between the port and the mixing chamber, wherein the mixing chamber is adapted to mix and/or activate an accelerated jet of the at least one component, and provide, wherein the accelerated jet impacts the impact plate.

The present disclosure is directed toward a system and a method for gas-condensate recovery. A gas-condensate separator is in fluid communication with a production header and an ejector comprising a motive inlet, a suction inlet, and an ejector outlet. The gas-condensate separator comprises an inlet, a gas outlet, and a recovered condensate outlet. The recovered condensate outlet is in fluid communication with the suction inlet of the ejector, and the ejector outlet is in fluid communication with the production header. The method comprises feeding a production fluid from a production header to a gas-condensate separator. The production fluid is separated in the gas-condensate separator. A gas and a recovered condensate are recovered and the recovered condensate is recycled into the production header.

Disclosed is a hydrogen recirculation ejector for fuel cells including a recirculation line configured to recirculate residual hydrogen gas discharged from a fuel cell stack configured to generate electricity using air and hydrogen gas supplied thereto to an inlet of the fuel cell stack and an ejector including a nozzle installed on the recirculation line, the nozzle being configured to supply new hydrogen gas, a venturi tube configured to mix the hydrogen supplied from the nozzle and the recirculated hydrogen with each other, and a diffuser configured to supply the mixed hydrogen gas to the fuel cell stack, wherein the nozzle includes a hydrogen introduction portion, a ring-shaped inner wall, a ring-shaped outer wall, a ring-shaped front end wall, and a ring-shaped rear end wall, and wherein the thickness of the inner wall and/or the outer wall is gradually increased with increasing distance from the hydrogen introduction portion.