A double-reheat power generator with an ultra high pressure cylinder and a high-intermediate pressure (HP-IP) cylinder each having additional heat recovery turbine stages, comprising:
- a boiler water wall and an economizer;
- a boiler superheater system;
- the ultra high pressure cylinder having additional heat recovery turbine stages;
- a boiler primary reheater system;
- the HP-IP cylinder having additional heat recovery turbine stages;
- a boiler secondary reheater system;
- an intermediate-low pressure (IP-LP) cylinder;
- an air preheater;
- an air preheater drainage pump;
- a condenser;
- a condensate pump;
- an ultra-low temperature economizer;
- a deaerator;
- an electric feedwater pump;
- a fourth high pressure heater;
- a third high pressure heater;
- a second high pressure heater;
- and
- a first high pressure heater;
- wherein the ultra high pressure cylinder having additional heat recovery turbine stages comprises all-pressure-stage impellers, nozzles, steam distribution mechanisms of the ultra high pressure cylinder;
- a steam exhaust hood of the ultra high pressure cylinder becomes a large extraction steam opening;
- five short-blade pressure stages are newly added after the steam exhaust hood;
- and divided steam continues to expand and exert effect in the newly-added pressure stages, and then is output, with a low degree of superheat and a low value of enthalpy, from a new second extraction, a new third extraction and a new fourth extraction, respectively;
- steam exhaust of the ultra high pressure cylinder having additional heat recovery turbine stages, as a first extraction, supplies steam to the first high pressure heater;
- the new second extraction of the ultra high pressure cylinder having additional heat recovery turbine stages supplies steam to the second high pressure heater;
- the new third extraction of the ultra high pressure cylinder having additional heat recovery turbine stages supplies steam to the third high pressure heater;
- and the new fourth extraction of the ultra high pressure cylinder having additional heat recovery turbine stages supplies steam to the fourth high pressure heater;
- a new fifth extraction of the HP-IP cylinder having additional heat recovery turbine stages supplies steam to the deaerator;
- and a new sixth extraction of the HP-IP cylinder having additional heat recovery turbine stages supplies steam to the air preheater;
- the air preheater drainage pump is configured to pump drainage water of the air preheater to the deaerator;
- an inlet steam pressure of the ultra high pressure cylinder having additional heat recovery turbine stages is 40 MPa;
- and an exhaust steam pressure of the ultra high pressure cylinder having additional heat recovery turbine stages is 15 MPa;
- an inlet steam pressure of the HP-IP cylinder having additional heat recovery turbine stages is 14 MPa;
- and an exhaust steam pressure of the HP-IP cylinder having additional heat recovery turbine stages is 3.78 MPa;
- an inlet steam pressure of the IP-LP cylinder is 3.5 MPa;
- and an exhaust steam pressure of the IP-LP cylinder is 3.5 kPa;
- a pressure of the new fifth extraction of the HP-IP cylinder having additional heat recovery turbine stages is 1.22 MPa;
- and a temperature of the new fifth extraction of the HP-IP cylinder having additional heat recovery turbine stages is 255° C.;
- a pressure of the new sixth extraction of the HP-IP cylinder having additional heat recovery turbine stages is 0.3 MPa;
- and a temperature of the new sixth extraction of the HP-IP cylinder having additional heat recovery turbine stages is 133.5° C.;
- and there is a slight humidity;
- and
- the air preheater is able to increase an inlet air temperature of an air-heater by 80K to 100 K;
- and condensate water side outlet design temperature of the ultra-low temperature economizer is 150° C.