Patent ID: 9400113
Filing Date: 2016-07-26
CPC Classification: F02C,F23C,F23D,F23R

Claim Text:
1. A gas turbine combustor which comprises: a main burner to supply a first premixed gas, containing a first fuel, to a first combustion region within a combustion chamber and then to combust the first premixed gas; and a supplemental burner to supply a second premixed gas, containing a second fuel of a composition different from that of the first fuel, to a second combustion region at a location downstream of the first combustion region within the combustion chamber and then to combust the second premixed gas; in which the first fuel is of a hydrocarbon system and the second fuel is a gas containing hydrogen in concentration exceeding a stable combustion limiting concentration of the hydrogen, in which the supplemental burner is a premixing burner operable to premix both of the first fuel and the second fuel with an air so as to provide the second premixed gas and to supply the second premixed gas to the second combustion region, in which the supplemental burner comprises a premixing chamber to which the air is introduced, a first nozzle to inject the first fuel into the premixing chamber, a second nozzle to inject the second fuel into the premixing chamber, a first fuel chamber to reserve the first fuel, and a second fuel chamber to reserve the second fuel, and in which the first nozzle is in the form of a plurality of small perforations, which open in the first fuel chamber, and the second nozzle is in the form of a plurality of small perforations which open in the second fuel chamber.