Abstract: A burner that includes a primary air or gas duct delimited by an exterior wall and a concentric interior wall of axis X and ducts for radial primary air or gas injection is described. The air or gas duct includes a ring that is rotationally mobile and has axial protrusions constituting distributors which collaborate with the radial primary air ducts arranged on the interior wall and form two passages of different angles in each duct. Rotating the ring making it possible to vary the angle of injection of the radial primary air. Thus, the regulation is situated just at the tip of the burner, in the region of the outlet of the primary air into the kiln, by modifying the outlet angle of the radial component for fixed section, thereby greatly simplifying the regulating of the burner.

Abstract: A burner is described that includes a main longitudinal pipe into which there flows primary transport air loaded with solid particles of a pulverulent fuel, a longitudinal tube arranged inside and concentric to the main pipe, the longitudinal tube extending to the vicinity of a primary transport air outlet end of the main pipe and producing an outer longitudinal passage disposed around and concentric to an inner longitudinal passage, and means for distributing the different concentrations of solid particles in the primary transport air, in the outer longitudinal passage and in the inner longitudinal passage.

Abstract: A burner that includes a primary air or gas duct delimited by an exterior wall and a concentric interior wall of axis X and ducts for radial primary air or gas injection is described. The air or gas duct includes a ring that is rotationally mobile and has axial protrusions constituting distributors which collaborate with the radial primary air ducts arranged on the interior wall and form two passages of different angles in each duct. Rotating the ring making it possible to vary the angle of injection of the radial primary air. Thus, the regulation is situated just at the tip of the burner, in the region of the outlet of the primary air into the kiln, by modifying the outlet angle of the radial component for fixed section, thereby greatly simplifying the regulating of the burner.

Abstract: A burner is described that includes a main longitudinal pipe into which there flows primary transport air loaded with solid particles of a pulverulent fuel, a longitudinal tube arranged inside and concentric to the main pipe, the longitudinal tube extending to the vicinity of a primary transport air outlet end of the main pipe and producing an outer longitudinal passage disposed around and concentric to an inner longitudinal passage, and means for distributing the different concentrations of solid particles in the primary transport air, in the outer longitudinal passage and in the inner longitudinal passage.