Method of partial load CO reduction operation for a two-stage combustion gas turbine

摘要

The present invention relates to a method of partial load CO reduction operation and low CO emission operation of a gas turbine performing two-stage combustion. The turbine basically has at least one compressor and a first combustor connected downstream of the compressor, the hot gas of the first combustor being at least an intermediate turbine or directly or indirectly To the second combustor. The hot gas of the second combustor is supplied to another turbine or directly or indirectly to the energy recovery unit. At least one combustor extends below a calorific combustion passage having a can-shaped configuration (4, 15), where the combustion air ratio (λ) of at least the second combustor (15 ′) is maximum. It is kept lower than the air ratio (λmax).