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Apparatus for flaring combustible waste gases from oil refineries and the like including a vertical flare stack, a continuously burning pilot burner mounted adjacent the flare stack and a temporary flame retention burner mounted in close proximity to the pilot burner. The pilot burner is provided wi

Apparatus for flaring combustible waste gases from oil refineries and the like including a vertical flare stack, a continuously burning pilot burner mounted adjacent the flare stack and a temporary flame retention burner mounted in close proximity to the pilot burner. The pilot burner is provided with a venturi for producing a combustible air-gas mixture and a spark producing device which ignites the combustible mixture in the burner thereby producing a flame front which travels to the top of the burner and ignites the temporary flame retention burner. After the spent gas has been purged from the pilot burner by continuing to flow combustible gas therethrough, the pilot burner is reignited by the flame retention burner, the latter then being extinguished by shutting off its supply.

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Apparatus for flaring combustible waste gases comprising in combination: a vertical stack through which combustible waste gases may be discharged, said stack having a base, a continuously burning pilot assembly mounted adjacent said stack, said pilot assembly comprising: a vertical tube in substanti

Apparatus for flaring combustible waste gases comprising in combination: a vertical stack through which combustible waste gases may be discharged, said stack having a base, a continuously burning pilot assembly mounted adjacent said stack, said pilot assembly comprising: a vertical tube in substantially parallel and co-extensive spatial relationship with said stack, said tube having a base near the base of said stack, said vertical tube having an outlet on its upper end in close proximity to the discharge end of said stack and an inlet near its base, a continuous flame nozzle on the outlet of said vertical tube, a venturi in fluid communication with the inlet of said vertical tube for mixing air and a combustible raw gas and introducing same into said vertical tube, said venturi being located near the base of said vertical tube, a source of combustible raw gas connected to said venturi, a temporary burner mounted adjacent said vertical tube and having a flame retention nozzle in close proximity to said continuous flame nozzle, a source of combustible raw gas connected to said temporary burner, momentary igniter means for igniting the mixture of combustible raw gas and air produced by said venturi, said igniter means being positioned within said vertical tube near the base thereof downstream from said venturi, and independently controlled first and second valve means for regulating the flow of combustible raw gas to said venturi and said temporary burner.