BOILER-TURBINE DIOXIDE-CARBON POWER PLANT Russian patent published in 2019 - IPC F01K25/10 

FIELD: power engineering.

SUBSTANCE: invention relates to heat engineering and can be used to increase efficiency and reduce metal consumption of a boiler of a boiler turbine dioxide-carbon power plant (CO₂-PP) using carbon dioxide (CO₂) as working medium. Boiler turbine CO₂-PP contains boiler 1 with superheater 2 CO₂ high pressure (CO₂ h.p.), turbine 3 consisting of two high and low pressure (HPT and LPT) turbines 3a and 3b communicated at CO₂ h.p. inlet with superheater 2 to CO₂ h.p. output, recuperator 4 consisting of high-temperature recuperator HTR 4a and low-temperature recuperator LTR 4b communicated at outlet via heated CO₂ h.p. with superheater 2 input to CO₂ h.p., at CO₂ low pressure inlet (CO₂ l.p.) – with output of LPT 3b by CO₂ l.p., cooler 5 communicated at CO₂ l.p. inlet with output of LTR 4b by CO₂ l.p., and compressor 6 communicated at CO₂ l.p. inlet with coolant 5 output by CO₂ l.p., at output by CO₂ h.p. – with input of LTR 4b by CO₂ h.p. Boiler comprises bypass heater (BH) 10, installed in gas channel of boiler behind superheater 2, communicated at CO₂ h.p. output with superheater 2 input to CO₂ h.p., at CO₂ h.p. inlet – with output of LTR 4b by CO₂. h.p., control valve (CV) 11 installed on CO₂ h.p. supply line from LTR 4b to BH 10 to allow adjustment of CO₂ h.p. supply in Bh 10 by condition of equality of temperatures CO₂ h.p. at outputs Bh 10 and HYR 4a by CO₂ h.p., furnace 12 operating on gas fuel, and air heater (AH), consisting of high-temperature and low-temperature stages 13 and 16 and installed in boiler gas circuit behind BH 10. Boiler turbine CO₂-PP contains liquid fuel heater 15, gas-liquid heat exchanger 17 installed between stages of AH 3 and 16, and air separation unit 19 communicated at air inlet with environment, at outlet of oxygen-enriched air – with inlet of low-temperature stage 16 of AH by air.

EFFECT: invention allows increasing efficiency of boiler and boiler-turbine CO₂-PP.

4 cl, 2 dwg