METHOD FOR OPERATION OF COGENERATION STEAM TURBINE ACCORDING TO THERMAL SCHEDULE Russian patent published in 2021 - IPC F01K17/02 

FIELD: heat power engineering.

SUBSTANCE: invention relates to the field of heat power engineering and can be used, in particular, at thermal power plants (TPP) when operating cogeneration steam turbines according to a thermal schedule. The method for operation of a cogeneration steam turbine according to the thermal schedule, which is carried out by switching from the mode with steam passing from the high-pressure cylinder of the turbine through the first receiver to the medium-pressure cylinder of the turbine and then from the medium-pressure cylinder of the turbine through the second receiver to the low-pressure cylinder of the turbine to the counter-pressure mode of the cylinder medium-pressure turbine by installing plugs on the line of the second receiver in the flange connection between the outlet from the medium-pressure cylinder of the turbine and the second receiver. Wherein, in order to reduce pressure losses, check valves are removed on the line of cogeneration extraction of the medium-pressure cylinder of the turbine located after its twenty-first stage. In this case, the rotor with rotor blades and disks of the low-pressure cylinder of the turbine is replaced by a shaft without disks and blades.

EFFECT: reduction of pressure loss on the line of cogeneration extraction of the medium-pressure cylinder of the turbine and reduction of power loss for friction and ventilation in the stages of the medium-pressure cylinder of the turbine during its operation according to the thermal schedule.

4 cl, 1 dwg