A heat-power decoupling system coupled with molten salt energy storage, comprising a steam boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a generator, a condenser, a condensate pump, a low-temperature molten salt tank and a high-temperature molten salt tank;
- wherein the system further comprises a buffer tank, a steam-molten salt heat exchanger, a main steam-molten salt heat exchanger, a reheat steam-molten salt heat exchanger, a steam ejector, a heat exchanger, a steam superheater and a brine dual-media thermal storage tank;
- a steam outlet of the steam boiler is connected with a steam inlet of the high-pressure cylinder and a steam end inlet of the main steam-molten salt heat exchanger, a steam outlet of the high-pressure cylinder is connected with an inlet of a reheater of the steam boiler, and an outlet of the reheater of the steam boiler is connected with a steam inlet of the medium-pressure cylinder, a steam inlet of the brine dual-media thermal storage tank and a steam end inlet of the reheat steam-molten salt heat exchanger;
- a steam outlet of the medium-pressure cylinder is connected with a steam inlet of the low-pressure cylinder, a steam outlet of the low-pressure cylinder is connected with an inlet of the condenser and the generator, an outlet of the condenser is connected with an inlet of the condensate pump, and an outlet of the condensate pump is connected with a feedwater inlet of the steam boiler and a feedwater end inlet of the heat exchanger;
- a steam end outlet of the main steam-molten salt heat exchanger is connected with a steam end inlet of the steam-molten salt heat exchanger and an inlet of the steam ejector, a steam end outlet of the steam-molten salt heat exchanger is connected with the feedwater inlet of the steam boiler, a steam end outlet of the reheat steam-molten salt heat exchanger is connected with the inlet of the steam ejector and the steam inlet of the low-pressure cylinder, and an outlet of the steam ejector is connected with the reheater inlet of the steam boiler;
- an outlet of the low-temperature molten salt tank is connected with a molten salt end inlet of the steam-molten salt heater exchanger, a molten salt end outlet of the steam-molten salt heat exchanger is connected with an inlet of the buffer tank, and an outlet of the buffer tank is connected with a molten salt inlet of the main steam-molten salt heat exchanger and a molten salt inlet of the reheat steam-molten salt heat exchanger;
- a molten salt outlet of the main steam-molten salt heat exchanger is connected with an inlet of the high-temperature molten salt tank, a molten salt outlet of the reheat steam-molten salt heat exchanger is connected with the inlet of the high-temperature molten salt tank, an outlet of the high-temperature molten salt tank is connected with a molten salt end inlet of the heat exchanger, a molten salt end outlet of the heat exchanger is connected with an inlet of the low-temperature molten salt tank, and a feedwater end outlet of the heat exchanger is connected with the feedwater inlet of the steam boiler;
- and
- a steam outlet of the brine dual-media thermal storage tank is connected with a steam end inlet of the steam superheater, a steam end outlet of the steam superheater is connected with the steam inlet of the low-pressure cylinder, an outlet of the high-pressure molten salt tank is connected with a molten salt end inlet of the steam superheater, and a molten salt end outlet of the steam superheater is connected with the inlet of the buffer tank.