Abstract: A gas flare includes a primary combustion air passage having an inlet end, an outlet end and an interior cavity that extends between the inlet end and the outlet end. A pressurized gas injection ring encircles the outlet end of the primary air passage. The pressurized gas injection ring has a plurality of nozzles. Each of the nozzles is angled inwardly, upwardly and a few degrees laterally. This creates a venturi effect with a generally helical circulation that draws combustion air from the primary combustion air passage and intermixes the gas with the combustion air to form a combustible mixture.

Abstract: A gas flare is described which includes a vent stack for combustion air having a first end and a second end. A gaseous fuel cyclone chamber surrounds the vent stack. The cyclone chamber has an interior wall conterminous with the vent stack and an exterior wall spaced from the vent stack. The cyclone chamber has a narrowing defining an access opening adjacent the first end of the vent stack. A gaseous fuel injection ring surrounds the first end of the vent stack with fuel nozzles extending into the access opening of the cyclone chamber. Gaseous fuel is fed into the cyclone chamber for thorough mixing prior to combustion. An igniter is positioned above the first end of the vent stack. Gaseous fuel flowing under pressure from the cyclone chamber creates a venturi effect drawing air up the vent stack to form a mixture of air and gaseous fuel which is ignited by the igniter. A combustion air passage communicates with the second end of the vent stack.

Abstract: A safety flare for combustion of waste gases is described which includes a container having an interior and an exterior. The interior is defined by a bottom and peripheral sidewalls. A vent stack extends through the interior of the container. The vent stack has a first end and a second end. The first end communicates with the exterior of the container adjacent the bottom. The second end extends past a top peripheral edge of the peripheral sidewalls of the container. Means is provided for permitting the communication of combustion air with the first end of the vent stack. A burner is positioned immediately surrounding the second end of the vent stack such that the burner is supplied with combustion air by the vent stack. The burner has a plurality of downwardly directed nozzles such that liquids passing through the nozzles fall by force of gravity into the interior of the container. This safety flare is intended to replace flare stacks and flare pits formerly used in the oil and gas industry.