Combined cycle device for steam extraction integration and heat storage peak-load shaving coupling and operation method of combined cycle device

Abstract

The invention relates to a combined cycle device for steam extraction integration and heat storage peak-load shaving coupling and an operation method of the combined cycle device. The combined cycle device comprises a gas turbine unit and a steam turbine unit; the gas turbine unit comprises a gas turbine air compressor, a gas turbine combustion chamber, a gas turbine body and a first generator, and the steam turbine unit comprises a waste heat boiler, a steam turbine high-pressure cylinder, a steam turbine low-pressure cylinder, a second generator, a steam condenser, a condensate water pump, agland heater, a deaerator, a first temperature and pressure reducing device, a second temperature and pressure reducing device, a steam heat accumulator, working equipment, power equipment, a heaterfor heating a network, a dewatering heat exchanger and a circular pump of a heat supply network. Based on the principle of gradient energy utilization and combined with a steam surplus energy utilization mode, integrated design of different steam extraction modes is carried out, and the thermoelectric decoupling operation capacity of a 6FA type combined cycle unit is effectively improved; the steam heat accumulator is utilized to improve the peak-load shaving and frequency modulation capacity of the combined cycle unit, and meanwhile, the outward heating capacity of the combined cycle unit under all conditions is guaranteed.

Description

technical field

[0001] The invention belongs to the technical field of improving the flexibility of thermal power units, and in particular relates to a combined cycle device for coupling steam extraction integration and heat storage peak regulation and an operating method thereof. Background technique

[0002] At present, my country's policies are gradually emphasizing the promotion of new energy sources and reducing the proportion of thermal power units, which makes the development of thermal power units face severe challenges. At present, in order to improve the comprehensive energy utilization efficiency of thermal power units and strive for more utilization hours of power generation, deeply excavating the heating capacity of thermal power units has attracted more and more attention from all walks of life. Gas-fired cogeneration is a form of energy utilization that produces heat and electricity at the same time. It uses high-grade heat for power generation and low-grade h...

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