STEAM TURBINE PLANT WITH MAIN CONDENSATE RECIRCULATION SYSTEM AND LUBRICATION SYSTEM Russian patent published in 2023 - IPC F01K17/04 

FIELD: thermal power engineering.

SUBSTANCE: invention relates can be used in the design of new STPs and modernization of existing STPs. The present invention is intended to provide heating of the oil of the TU lubrication system and lowering the temperature of the main condensate entering as a cooling medium for condensing the working steam of the basic ejector and steam from the end seals of the turbine in the sealing ejector and sealing heater, thereby ensuring their normal operation. This is achieved by the claimed STP, which includes a turbine with a condenser connected to its exhaust part with a main bundle of cooling pipes with cooling water passing through them, a condensate trap with a connected condensate pump pumping the main condensate formed from the steam entering the condenser vapor space, depending from interconnected control valves of the main condensate and recirculation through the coolers of basic ejector, sealing ejector, sealing heater to the heaters of the regenerative system. A surface water-oil heat exchanger is connected to the main condensate line of the turbine regenerative system by its inlet on the water side, and to the return line of the recirculation flow to the vapor space of the condenser by its outlet on the water side. A distinctive feature of the claimed STP is that on the oil side, the surface water-oil heat exchanger is connected by a pipeline to the zone of cold oil of the oil tank by its inlet pipe, and to the heated oil zone of the oil tank of the lubrication system of the steam turbine plant by its outlet pipe.

EFFECT: eliminating the disadvantages of equivalents.

1 cl, 1 dwg