BOILER-TURBINE DIOXIDE-CARBON POWER PLANT

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 (CO-PP) using carbon dioxide (CO) as working medium. Boiler turbine CO-PP contains boiler 1 with superheater 2 COhigh pressure (COh.p.), turbine 3 consisting of two high and low pressure (HPT and LPT) turbines 3a and 3b communicated at COh.p. inlet with superheater 2 to COh.p. output, recuperator 4 consisting of high-temperature recuperator HTR 4a and low-temperature recuperator LTR 4b communicated at outlet via heated COh.p. with superheater 2 input to COh.p., at COlow pressure inlet (COl.p.) - with output of LPT 3b by COl.p., cooler 5 communicated at COl.p. inlet with output of LTR 4b by COl.p., and compressor 6 communicated at COl.p. inlet with coolant 5 output by COl.p., at output by COh.p. - with input of LTR 4b by COh.p. Boiler comprises bypass heater (BH) 10, installed in gas channel of boiler behind superheater 2, communicated at COh.p. output with superheater 2 input to COh.p., at COh.p. inlet - with output of LTR 4b by CO. h.p., control valve (CV) 11 installed on COh.p. supply line from LTR 4b to BH 10 to allow adjustment of COh.p. supply in Bh 10 by condition of equality of temperatures COh.p. at outputs Bh 10 and HYR 4a by COh.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 CO-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 CO-PP.4 cl, 2 dwg Изобретение относится к теплоэнергетике и может быть использовано для повышения КПД и снижения металлоемкости котла котлотурбинной диоксид-углеродной энергоустановки (CO-ЭУ), использующей диоксид углерода (CO) в качестве рабочего тела. Котлотурбинная CO-ЭУ содержит котел 1 с перегревателем 2 COвысокого давления (COв.д.), турбину 3, состоящую из двух турбин высокого и низкого давления (ТВД и ТНД) 3а и 3б, сообщенную на входе по COв.д. с выходом перегревателя 2 по COв.д., рекуператор 4, состоящий из высокотемпературного рекуператора (ВТР) 4а и низкотемпературного рекуператора (НТР) 4б,