Burner and fuel lance for a gas turbine installation

摘要

A lance is presented for introducing fuel into a second burner of a combustion chamber of a gas turbine installation with sequential combustion, having a first and a second combustion chamber. The lance includes a foot and a shank which projects from it. In an installed state of the lance the foot extends perpendicularly or at an angle to a main flow direction of the burner. The shank extends centrally in the burner and generally parallel to the main flow direction. At least one projecting arm, having at least one nozzle for introducing fuel, is arranged such that it extends from the shank. A respective end of the at least one arm is oriented in the main flow direction and extends generally parallel to the main flow direction.

主权项

1. A burner of a combustion chamber of a gas turbine installation with sequential combustion, the burner comprising:
a single burner wall which encloses a single mixing chamber of the burner; a vortex generator in an inlet region of the burner; a single lance for introducing gaseous fuel into the burner, the single lance comprising a foot and a shank which projects from it, in an installed state of the lance the foot extends perpendicularly or at an angle to a main flow direction of the burner, the shank extends centrally in the burner and generally parallel to the main flow direction, at least one projecting arm, having at least one nozzle for introducing fuel, is arranged such that the respective arm projects radially from the shank with regard to a longitudinal center axis of the shank, and wherein a longitudinal direction of the arm includes a component which extends parallel to the longitudinal center axis of the shank such that a respective end of the at least one arm is oriented in the main flow direction and extends generally parallel to the main flow direction, wherein the lance is arranged downstream of the vortex generator; and wherein more than half of a combustible gas is directed at high load as primary combustible gas flow into a center of at least one vortex in the burner via at least one short arm of the lance.