STEAM TURBINE COGENERATION PLANT Russian patent published in 2022 - IPC F01K17/02 

FIELD: thermal power engineering.

SUBSTANCE: invention relates to thermal power engineering and can be used at thermal power plants for steam turbine heating plants (STHP), which use steam jet ejectors. The cogeneration steam turbine plant contains a steam turbine 1 with a turbine condenser 2 connected through a branch pipe, a steam extraction line made in the form of a steam pipeline connected to the general station steam collector 8. Steam to the main ejectors 6, 7 of the turbine and to the ejector 10 of the network water heaters, made of steam jet and connected in parallel to each other, is supplied from the general station steam collector 8 through the corresponding steam pipelines through the corresponding steam pipes. The ejector 10 of the network water heaters has a steam-air mixture compression ratio (SAM) of 2…3, which is less than the SAM compression ratio in the main ejectors 6, 7 of the turbine 25…30. Steam heaters 4 and 5 network water horizontal is supplied through line 17 from the selection of the steam turbine 1 through the appropriate pipe. SAM is cascaded from the network water heater 5 to the network water heater 4 along the line 16 for the removal of the steam-air mixture, and then it is sucked out of the network water heater 4 by the ejector 10 of the network water heaters along the steam-air mixture suction line 11. The steam condensate is cascaded from the condensate collector of the heater 5 of the network water to the condensate collector of the heater 4 of the network water. From the condenser 2 of the turbine, by means of a pump 3, the main condensate (MC) is fed through the coolers of the main ejectors 6, 7 of the turbine along the line 13 of the main condensate (MC). The steam condensate through the respective coolers of the main ejectors 6, 7 of the turbine is discharged into the condenser 2 of the turbine through lines 9 for the removal of steam condensate, and the air from the main ejectors 6, 7 of the turbine is discharged through line 14 into the atmosphere. The ejector 10 of the network water heaters through the cooler is connected to the line 13 of the main condensate behind the main ejectors 6, 7 of the turbine, and the condensate of its steam is supplied through the line 12 of the steam condensate outlet to the condensate collector of the first heater 4 of the network water, and from it the steam condensate of the ejector 10 of the network water heaters and steam condensate from the condensate collector of the first heating water heater 4 is fed into the main condensate line 13 after the ejector 10 of heating water heaters.

EFFECT: reduction of heat consumption for own needs of the heating plant and increase in the reliability of the operation of the air suction circuit from the network water heaters.

1 cl, 1 dwg