FUEL INJECTION METHOD

摘要

The present invention concerns a method for fuel injection in a sequential combustion system comprising a first combustion chamber (18) and downstream thereof a second combustion chamber (2), in between which at least one vortex generator (3) is located, as well as a premixing chamber (4) having a longitudinal axis (A) downstream of the vortex generator (3), and a fuel lance (5) having a vertical portion (6) and a horizontal portion (7), being located within said premixing chamber (4). The fuel injected is an MBtu-fuel. In said premixing chamber (4) the fuel and a gas contained in an oxidizing stream (22) coming from the first combustion chamber (18) are premixed to a combustible mixture. The fuel is injected in such a way that the residence time of the fuel in the premixing chamber (4) is reduced in comparison with a radial injection of the fuel from the horizontal portion (7) of the fuel lance (5).