A supercritical carbon dioxide power system for supplying industrial steam and its operation method

Abstract

The invention discloses a supercritical carbon dioxide power system for supplying industrial steam and an operation method thereof. The invention adopts the supercritical carbon dioxide cycle as the power cycle, couples the steam generation system, and provides users with two energy sources of steam and electricity at the same time; Coupling optimization of the heat-steam generation process, the present invention can greatly improve the energy utilization rate of the supercritical carbon dioxide power system; the system of the present invention divides the steam generation process into two stages: first, the working medium is pumped through the hot side of the outlet of the medium temperature regenerator The gas is used to heat the feed water for the first time, and then use the diverted low-temperature flue gas to heat the industrial steam for the second time. The low-temperature waste heat of the system can be reasonably used. The temperature of the steam supply can also be adjusted by adjusting the ratio of carbon dioxide extraction and flue gas splitting to meet the needs of different industrial steam extraction loads. , Improve unit operation flexibility.

Description

technical field [0001] The invention belongs to the technical field of cogeneration of heat and power, and in particular relates to a supercritical carbon dioxide power system for supplying industrial steam and an operation method. Background technique [0002] The stable growth of my country's economy is inseparable from the support of a strong energy system. It is one of the main directions for the future development of power generation systems to realize cogeneration of heat and power while meeting the electricity and heat load demands of the society. At the same time, cogeneration of heat and power is one of the most effective means to save energy, reduce emissions, and improve the energy utilization efficiency of power stations. In recent years, my country's energy sources are developing toward diversification, but thermal power has a large base and mature technology, and coal-fired power generation is still the main power generation method in my country in a short per...

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Problems solved by technology

[0004] Since the exhaust steam temperature of the supercritical carbon dioxide system is greater than 400°C, there is a large irreversible loss when used to heat industrial steam, and the temperature of the working fluid entering the precooler is less than 100°C, which is difficult to meet the needs of industrial steam heat users, so it is necessary to properly carry out the system The energy level matching, to find a reasonable heat source for industrial steam

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