Multi-working fluid thermoelectric peak shaving system and operation method thereof

Abstract

The present application relates to the technical field of thermoelectric peak regulation, and particularly relates to a multi-working medium thermoelectric peak regulation system and a running method thereof, which comprises a CO2 storage tank, a compressor, a coal-based high-temperature solid heat storage device, a coal-based phase change heat storage device, a steam input port, a steam turbine, and a generator connected with a main shaft of the steam turbine; the CO2 storage tank stores CO2 discharged from the coal-based phase change heat storage device, and can deliver the stored CO2 to the coal-based high-temperature solid heat storage device through the compressor; the coal-based high-temperature solid heat storage device stores heat energy through CO2, and can deliver the heated CO2 to the steam turbine for power generation; the steam input port delivers high-temperature steam to the steam turbine for power generation; and the coal-based phase change heat storage device is used for recovering heat carried in exhaust gas of the steam turbine. Not only the excess steam in the valley section is fully utilized, but also the utilization rate of the boiler thermal system is greatly improved, CO2 is reduced, the operation flexibility of the thermal power plant is improved, and thermal and electric decoupling is realized.

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