METHOD FOR OPERATION OF GAS-TURBINE POWER PLANT WITH SPENT GAS RECYCLING AND CORRESPONDING GAS-TURBINE POWER PLANT Russian patent published in 2017 - IPC F02C3/34 

FIELD: power industry.

SUBSTANCE: method for operation of a gas turbine plant (6) comprising a compressor (1) with an inlet cross-section, a combustion chamber (4, 14, 15) and a turbine (7, 16, 17). Gas with reduced oxygen content that has oxygen concentration below the average oxygen concentration in the stream at the compressor inlet and fresh air (2) are fed to the compressor in a radially separated manner. Fresh air is supplied through the outer part (3') of the inlet cross-section relative to the rotational axis of the compressor (1), and gas with reduced oxygen content is supplied through the inner part (3") of the inlet cross-section relative to the rotational axis of the compressor (1). A portion of cooling air in the gas turbine plant is withdrawn from the outer wall of the compressor casing via sampling points of the compressor. Fresh air is withdrawn in the compressor and sent past the combustion chamber in the form of cooling gas while maintaining a low oxygen flow in the compressor, and fed into the combustion chamber from the compressor outlet. The reliable operation of a gas turbine plant with two inlet flows with different gas compositions is achieved, in which the effect of the intake stream with reduced oxygen content on combustion is maximized.

EFFECT: possibility of gas mass flow application, with gas having a reduced proportion of oxygen, which provides a certain effect during combustion.

15 cl, 5 dwg