초록 ▼

In a premix burner, the swirl-stabilized interior space (18) has a conical inner body (13) running in the direction of flow. The outer casing of the interior space (18) is pierced by tangentially arranged air-inlet ducts (11a, 12a) through which a combustion-air flow (16) flows into the interior spa

In a premix burner, the swirl-stabilized interior space (18) has a conical inner body (13) running in the direction of flow. The outer casing of the interior space (18) is pierced by tangentially arranged air-inlet ducts (11a, 12a) through which a combustion-air flow (16) flows into the interior space (18). The swirl flow (23) forming in the interior space (18) is enriched with a fuel via at least one fuel lance (17). The mixture of the two media is then formed in the downstream mixing tube (21). The mixing tube (21) then merges into a combustion space (31) via a jump in cross section, a backflow zone (32) forming in the region of the plane of the jump in cross section, which backflow zone (32) ensures the stability of the combustion.

대표청구항 ▼

[ What is claimed is:] [1.] A premix burner comprising:a swirl generator including a casing with a longitudinal axis extending between an upstream end and a downstream end, said casing including an interior space;means for injecting a fuel into said interior space;conical inner body extending longit

[ What is claimed is:] [1.] A premix burner comprising:a swirl generator including a casing with a longitudinal axis extending between an upstream end and a downstream end, said casing including an interior space;means for injecting a fuel into said interior space;conical inner body extending longitudinally in said interior space;at least one tangential air-inlet duct formed in said casing and extending longitudinally for conducting combustion air into said interior space through said tangential air-inlet duct;a mixing tube downstream of said swirl generator casing, said mixing tube having a downstream end having a cross sectional dimension and an outlet plane;a combustor having a combustion space positioned downstream of said mixing tube, said combustion space having an upstream end cross sectional dimension;a front wall forming a jump in cross section between said mixing tube downstream end cross sectional dimension and said combustion space upstream end cross sectional dimension;said mixing tube merging into said combustor at said jump in cross section, and wherein a backflow zone can form in the region of a plane of said jump in cross section when combustion air and fuel flows through said burner; andwherein said front wall comprises a separation edge at said mixing tube downstream end, said separation edge including a transition radius at said mixing tube outlet plane and a separation step radially offset from said mixing tube outlet plane.