Coal-fired power generation and renewable energy power generation coupled carbon dioxide trapping method and system

Abstract

The invention relates to a coal-fired power generation and renewable energy power generation coupled carbon dioxide trapping method and system. The electric energy of a renewable energy power generation system is used as energy for electrolysis of water to obtain hydrogen and oxygen, and the oxygen is supplied to a coal-fired power generation system for oxygen-enriched combustion of coal. Meanwhile, carbon dioxide in combustion tail gas in the coal-fired power generation process is captured, the hydrogen and the captured carbon dioxide are subjected to a catalytic conversion reaction, and the carbon dioxide is converted into a product. The redundant electric energy generated by renewable energy power generation is used for electrolyzing water to produce hydrogen, which is a clean hydrogen production mode. A reasonable absorption mode is provided for the redundant electric energy, energy waste is reduced, cheap electric energy is provided for producing hydrogen by electrolyzing water, the production cost of hydrogen energy is greatly reduced, and reasonable allocation and full utilization of energy are realized on the whole.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide capture and utilization, in particular to a carbon dioxide capture method and system for coal-fired power generation coupled with renewable energy power generation. Background technique [0002] my country's current energy structure is dominated by coal, and coal-fired power generation is the main source of carbon dioxide emissions. Therefore, coal-fired power plants are one of the industries most in need of carbon dioxide capture and conversion utilization technologies. Carbon dioxide capture and conversion utilization technologies include carbon dioxide capture technology, oxygen-enriched combustion technology and carbon dioxide conversion technology. Carbon dioxide capture technology is the process of separating and enriching carbon dioxide from coal combustion flue gas. This technology is simple, efficient and relatively mature, but it is limited to high carbon dioxide concentration. O...

AI Technical Summary

Problems solved by technology

Carbon dioxide capture technology is the process of separating and enriching carbon dioxide from coal combustion flue gas. This technology is simple, efficient and relatively mature, but it is limited to high carbon dioxide concentration.

However, the power generation capacity of renewable energy is greatly affected by seasons and the environment. Taking wind power generation as an example, the power generated by wind power generation is relatively large in seasons with low power consumption. Affected by lagging and other factors, a large amount of redundant electric energy is generated, which leads to the phenomenon of wind abandonment and serious energy waste

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