COMBINED-CYCLE THERMAL POWER PLANT WITH ENERGY STORAGE Russian patent published in 2022 - IPC F01K17/02 F02C6/18 

FIELD: heat engineering.

SUBSTANCE: invention can be used in heating combined-cycle power plants for heating stations. A combined-cycle thermal power plant with energy storage contains an air compressor (1), a combustion chamber (2), a gas turbine (3), a two-circuit heat recovery boiler (5), an electric generator (4), a steam turbine with high and low-pressure cylinders (8) and (9), a condenser (15) and condensate pump (16). The two-circuit heat recovery boiler (5) contains hot gas and cold water circuits (6) and (7) of the cooling medium. The electric generator (4) is mechanically connected to the air compressor (1). The outlet of the condensate pump (16) is connected to the inlet of the feed pump (17). The electric generator (10) is located on the same shaft with the steam turbine. There is a network heater (11) containing cold water and hot steam circuits (12) and (13) of the cooling medium and a condensate pump (14) of the network heater connected to it, the outlet of which is also connected to the inlet of the feed pump (17). The outlet of the feed pump (17) is connected to the inlet of the cold water circuit (7) of the cooling medium of the two-circuit heat recovery boiler (5). The first and second outlets of the recovery boiler (5) are connected to the high and low-pressure cylinders (8) and (9) of the steam turbine. The other outlet of the cylinder (9) of the low-pressure steam turbine is connected to the inlet of the hot steam circuit (13) of the network heater (11). The unit is equipped with a steam converter (18) containing its own hot and cold circuits (19) and (20), a methane steam conversion unit (21), a network conversion heater (22), a peak gas turbine unit (26), a gas-water heater (27) of mains water and a syngas storage (25). The inlet of the hot circuit (19) of the heat carrier of the steam converter (18) is connected to the first outlet of the cold water circuit (7) of the cooling medium of the two-circuit heat exchanger boiler, and its outlet is connected to the inlet of the feed pump (17). The outlet of the cold circuit (20) of the coolant of the steam converter (18) is connected to the inlet of the methane steam conversion unit (21), the outlet of which is connected to the input of the syngas storage (25). The other outlet of the methane steam conversion unit (21) is connected to the inlet of the hot circuit (6) of the cooling medium of the two-circuit heat recovery boiler (5). Another outlet of the methane steam conversion unit (21) is connected to the inlet of the hot circuit (24) of the network conversion heater (22), the outlet of which is connected to the inlet of the methane steam conversion unit (21), and another outlet of the methane steam conversion unit is connected to the inlet of the feed pump (17). The input of the cold circuit (23) of the cooling medium of the network conversion heater (22) is connected to the output of the cold circuit (12) of the cooling medium of the network heater (11). The outlet of the cold coolant circuit of the network conversion heater (22) is connected to the inlet of the cold circuit (29) of the cooling medium of the gas-water network water heater (27). The outlet of the syngas storage (25) is connected to the inlet of the combustion chamber (2), the other outlet is connected in series with the peak gas turbine unit (26) and the hot gas circuit (28) of the gas-water network water heater (27). Another outlet of the syngas storage (25) is connected to the feed pump inlet (17).

EFFECT: increase the maneuverability of the power plant.

1 cl, 1 dwg