Thermal power system energy storage peak regulation system for recovering latent heat in flue gas and working method

Abstract

The invention discloses a thermal power system energy storage peak regulation system for recovering latent heat in flue gas and a working method. The system comprises a flue, a flue gas cooler, a water pump, a water-carbon dioxide heat exchanger, a heat regenerator, a compressor, a motor, a carbon dioxide-particle/fused salt heat exchanger, a throttling valve, a cold tank, a pump and a hot tank. According to the thermal power system energy storage peak regulation system, by combining the advantages of low cold end temperature, high hot end temperature and high COP (coefficient of performance) of a carbon dioxide heat pump, firstly, low-grade waste heat in saturated wet flue gas is upgraded and recycled, and then the upgraded heat is stored through a large heat storage system and is efficiently and flexibly applied; the problem that a large amount of low-grade waste heat in saturated wet flue gas obtained after desulfurization of a thermal power generating unit is difficult to utilize can be effectively solved, and a large amount of water resources can be recycled while a large amount of low-grade waste heat in the flue gas is recycled; and in addition, the heat storage system can be used for auxiliary peak regulation of the unit according to the peak regulation requirement of the thermal power unit, and an electric boiler, a hot water storage tank and the like which are low in energy efficiency are replaced.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a thermal power system energy storage peak-shaving system and a working method for recovering latent heat in flue gas. Background technique [0002] In recent years, with the rapid development of my country's power generation industry, my country's thermal power units have made remarkable achievements in waste heat utilization, such as "low temperature economizer + air heater", "bypass flue economizer + displacement extraction heating Water supply" and other technologies have enabled most of my country's thermal power units to directly use the waste heat and have been effectively utilized, and the efficiency of thermal power units has reached the world's advanced level. [0003] However, there is still a large amount of heat in thermal power units in the form of low-grade waste heat. This part of waste heat is usually below 50°C, and it is difficult to...

AI Technical Summary

Problems solved by technology

The invention can effectively solve the problem of difficult utilization of a large amount of low-grade waste heat in the saturated wet flue gas after desulfurization of thermal power units, and recover a large amount of low-grade waste heat in the flue gas, as well as recover a large amount of water resources; The demand for peak shaving, using the heat storage system to assist the unit to shave the peak, replacing the energy-efficient electric boilers, hot water storage tanks, etc.

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