OXYGEN-FUEL POWER PLANT Russian patent published in 2022 - IPC F02C1/08 

FIELD: electric power industry.

SUBSTANCE: invention relates to the field of electric power industry and can be used in the development of power plants with low emissions of harmful substances into the atmosphere. The oxygen-fuel power plant contains a compressor (1), a combustion chamber (2), a fuel compressor (3), an air separation unit (4), a gas turbine (5), a waste heat boiler (6), which is made in the form of two heat exchangers - gas-water double-flow a heat exchanger (7) containing a hot gas circuit of the heat carrier (8) and a cold water circuit of the heat carrier (9), as well as a gas-air double-flow heat exchanger (10) containing a hot gas coolant circuit (11) and a cold carbon dioxide coolant circuit (12), a cooler-separator (13), a multi-stage compressor with intermediate cooling (14). The steam circuit consists of a steam turbine (15) containing high (16), medium (17) and low (18) pressure cylinders, a condenser (19), the first condensate pump (20) and a mixing type low pressure heater (21), a second condensing pump (22) and a mixing type low pressure heater (23), a third condensing pump (24), a group consisting of three surface type low pressure heaters (25), a deaerator (26), a feed pump (27), a group, consisting of three surface-type high-pressure heaters (28), carbon dioxide turbine (29), additional condenser (30), additional pump (31), first (32), second (33) and third (34) electric generators. The outlet of the hot gas circuit of the heat carrier (8) of the gas-water double-flow heat exchanger (7) of the waste heat boiler (6) is connected to the inlet of the hot gas circuit of the heat carrier (11) of the gas-air double-flow heat exchanger (10) of the waste heat boiler (6), the outlet of which, in turn, is connected to cooler-separator inlet (13). The condenser (19) is connected in series with the first condensate pump (20), the first low pressure heater mixing type (21), second condensing pump (22), second mixing type low pressure heater (23), third condensing pump (24), group consisting of three surface type low pressure heaters (25), deaerator (26), feed pump (27), a group consisting of three surface-type high-pressure heaters (28). The first (21) and second (22) mixing-type low-pressure heaters are connected to the low-pressure outlets of the low-pressure cylinder (18) of the steam turbine (15), a group of surface-type low-pressure heaters (25) is connected to the low-pressure outlets of the low-pressure cylinder (18 ) and the medium pressure cylinder (17) of the steam turbine (15), a group of surface-type high pressure heaters (28) is connected to the high pressure outlets of the high pressure cylinder (16) and the medium pressure cylinder (17) of the steam turbine (15). The output of the cold carbon dioxide circuit of the heat carrier (12) of the gas-air double-flow heat exchanger (10) of the waste heat boiler (6) is connected in series with the carbon dioxide turbine (29), additional condenser (30), additional pump (31), whose output is connected to the inlet of the cold carbon dioxide circuit of the heat carrier ( 12) gas-air two-flow heat exchanger (10) of the waste heat boiler (6).

EFFECT: increasing the net electrical efficiency of an oxygen-fuel power plant.

1 cl, 1 dwg