Patent ID: 6939130

Claim:
An apparatus comprising: a primary combustion stage comprising at least one outer wall forming an oxidant chamber having a primary oxidant inlet connected to an oxidant supply conduit and a primary oxidant outlet and at least one inner wall forming a fuel chamber disposed within said oxidant chamber having a primary fuel inlet and a primary fuel outlet oriented in a direction of said primary oxidant outlet, forming a primary annular space between said at least one outer wall and said at least one inner wall; a pre-combustor stage comprising at least one outer pre-combustor wall forming a pre-combustor fuel chamber having a pre-combustor fuel inlet and at least one inner pre-combustor wall forming a pre-combustor oxidant chamber having a pre-combustor oxidant inlet disposed within said pre-combustor fuel chamber and forming a pre-combustor annular space between said at least one outer pre-combustor wall and said at least one inner pre-combustor wall, said at least one inner pre-combustor wall forming a plurality of pre-combustor fuel outlets, providing fluid communication between said pre-combustor annular space and said pre-combustor oxidant chamber; and a pre-combustor oxidant supply conduit having one end connected to said oxidant supply conduit and an opposite end connected to said pre-combustor oxidant inlet, providing fluid communication between said oxidant supply conduit and said pre-combustor oxidant chamber.