COMBINED-CYCLE GAS TURBINE ON THREE WORKING BODIES Russian patent published in 2022 - IPC F01K23/10 

FIELD: power engineering.

SUBSTANCE: invention relates to the field of heat power engineering, namely, to power plants with more than two engines supplying energy to external consumers and working on different working bodies, and is intended for use in heat power plants. Combined-cycle gas turbine on three working bodies comprise a gas turbine unit (1), a waste heat boiler (2), an economiser (3), an evaporator (4) and a steam superheater (5), a high-pressure steam turbine (6) with a developed recovery system, an intermediate steam superheater (7), a low-pressure steam turbine (8) with an advanced recovery system, an electric generator (9), a steam turbine condenser (10), a first condensate pump (11) and a low-pressure heater (12), a second condensate pump (13) and a low-pressure heater (14), a third condensate pump (15) and a low-pressure heater (16), a fourth low-pressure heater (17), a deaerator (18), a feed pump (19), a first (20), a second (21), and a third (22) high-pressure heaters, a low-boiling working body (NRT) superheater (23), an NRT turbine (24), a second electric generator (25), an NRT recuperator (26), an NRT condenser (27), an NRT pump (28), and a gas duct (29) for discharging gases into the flue. The output of the high-pressure steam turbine (6) is connected with the input of the intermediate steam superheater (7), and the output thereof is connected with the input of the low-pressure steam turbine (8). The output of the low-pressure steam turbine (8) is connected with the condenser of the steam turbine (10), the output whereof is connected with the input of the first condensate pump (11). The output of the first condensate pump (11) is connected with the input of the first low-pressure heater (12), the other input whereof is connected with the bleeder of the low-pressure steam turbine (8). The output of the low-pressure heater (12) is connected with the input of the second condensate pump (13), the output whereof is connected with the input of the second low-pressure heater (14). The output of the second low-pressure heater (14), the other input whereof is connected with the bleeder of the low-pressure steam turbine (8), is connected with the input of the third condensate pump (15), the output whereof is connected with the input of the third low-pressure heater (16), the other input whereof is connected with the bleeder of the low-pressure steam turbine (8) and the output is connected with the third input of the second low-pressure heater (14). The other output of the third low-pressure heater (16) is connected with the input of the fourth low-pressure heater (17), the other input whereof is connected with the bleeder of the low-pressure steam turbine (8). The output of the fourth low-pressure heater (17) is connected with the third input of the third low-pressure heater (16). The other output of the fourth low-pressure heater (17) is connected with the input of the deaerator (18). The output of the deaerator (18), the other input whereof is connected with the bleeder of the high-pressure steam turbine (6) and another input is connected with the output of the first high-pressure heater (20), is connected with the input of the feed pump (19), the output whereof is connected with the input of the first high-pressure heater (20), the other input whereof is connected with the bleeder of the high-pressure steam turbine (6) and another input is connected with the output of the second high-pressure heater (21). The output of the first high-pressure heater (20) is connected with the input of the second high-pressure heater (21), the other input whereof is connected with the bleeder of the high-pressure steam turbine (6) and another input is connected with the other output of the third high-pressure heater (22), connected with the input of the third high-pressure heater (22). The other input of the third high-pressure heater (22) is connected with the bleeder of the high-pressure steam turbine (6). The output of the NRT turbine (24) is connected with one input of the NRT recuperator (26), the output whereof is connected with the input of the NRT condenser (27). The NRT recuperator (26) is connected with the input of the NRT superheater (23) by the other output.

EFFECT: increase in the net electric performance coefficient of the combined-cycle gas turbine on three working bodies.

1 cl, 1 dwg