Burner for burning pulverized fuel

Claim 1

A burner for burning pulverized fuel, said burner comprising a combustion chamber, an ignition chamber connected to said combustion chamber, means for supplying combustion air to said combustion chamber at approximately the location of the connection between the ignition chamber and the combustion chamber, a distribution pipe in said ignition chamber, means for delivering a mixture of pulverized fuel and pneumatic conveying air to one end of said distribution pipe, said delivery means including means for imparting rotary movement to the mixture of fuel and air causing it to flow along the wall of th distribution pipe, said distribution pipe having a plurality of openings distributed circumferentially and axially along the wall thereof allowing the mixture of fuel and air to flow gradually outwardly of said distribution pipe into said ignition chamber as it flows through the pipe in an axial direction, the end of the distribution pipe remote from said delivery means opening toward the combustion chamber, and an ignition device in said ignition chamber disposed outwardly of said distribution pipe for igniting the mixture of fuel and air as it exits the distribution pipe through said openings.