Solar energy, wind energy and fuel gas complementary combined hydrogen production methane production circulating thermal power generation device

Abstract

The invention discloses a solar energy, wind energy and fuel gas complementary combined hydrogen production methane production circulating heat power generation device. The device fully utilizes renewable energy such as solar energy and wind energy and a semi-closed supercritical carbon dioxide fuel gas Brayton thermal power generation system to realize complementary cycle power generation, the electric power generated by the solar energy and wind energy is mainly used for carrying out electrolysis hydrogen production and oxygen production on water generated by power generation of the system,the effluent carbon dioxide is subjected to hydrogenation methane preparation, oxygen is used for supporting combustion of natural gas or self-produced methane gas by the semi-closed supercritical carbon dioxide fuel gas Brayton thermal power generation system, and the high-temperature gas and the supercritical carbon dioxide power working medium which are fully mixed jointly drive a turbine to perform power generation; the water discharged by the system condensation and methanation preparation is collected not only for electrolytic hydrogen production, but redundant water is used for cleaninga solar energy mirror field or photovoltaic panels. According to the circulating thermal power generation device, the circulating thermal power generation is realized by means of renewable energy, and a technical basis is laid for replacing fossil energy power generation. The circulating thermal power generation device belongs to the technical field of solar energy thermal power generation and high-temperature thermal chemical interdisciplines.

Description

technical field [0001] The solar wind energy and gas complementary combined hydrogen to methane cycle thermal power generation device of the present invention fully utilizes renewable energy such as solar wind energy to generate electricity and realizes complementarity with the semi-closed supercritical carbon dioxide gas Brayton thermal power generation system; especially utilizes the electricity generated by solar wind energy The water generated by the system is electrolyzed to produce hydrogen and oxygen, and the exhaust carbon dioxide is hydrogenated to prepare methane, while the oxygen is used in the semi-closed supercritical carbon dioxide gas-fired Brayton thermal power generation system to support the combustion of natural gas or self-produced methane, fully The mixed high-temperature gas and supercritical carbon dioxide power working fluid jointly drive the turbine to generate electricity; the water discharged from the system's condensation and methanation preparation ...

AI Technical Summary

Problems solved by technology

However, with the emergence of semi-closed supercritical carbon dioxide Brayton thermal power generation technology and the success of the experiment, objectively, it brings hope for the realization of the above strategy, because the semi-closed supercritical carbon dioxide gas-fired Brayton thermal power generation uses alkane gases such as natural gas, In the mixed pure oxygen combustion process of methanol gas, biogas and syngas, all the effluent water and carbon dioxide can be recycled and reused. Therefore, the author tried to complement this technology with solar thermal power generation in patents 201310180460.2 and 201610856317.4 to make up for solar thermal power generation. The defect of unstable and discontinuous power generation, while overcoming the pollutant emission problem of gas-fired power generation

U.S. Patent US3736745 earlier revealed the technical principle of semi-closed supercritical carbon dioxide gas-fired Brayton thermal power generation. This patent document once advocated the use of oxygen mixed with natural gas to reduce the combustion temperature, and the exhaust carbon dioxide was used as a power medium for recycling. U.S. patents US5724805 and US6622470 respectively advocate the use of pure oxygen or air for combustion in the semi-closed supercritical carbon dioxide gas Brayton cycle. The advantage of using air is to reduce the cost of power generation, and the disadvantage is that the exhaust contains nitrogen oxides

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