Method for recycling carbon dioxide based on non-grid-connected wind power

Abstract

The invention relates to a method for recycling carbon dioxide based on non-grid-connected wind power. The method comprises the following steps: providing a power supply for water electrolysis by using complementation of non-grid-connected wind power and grid power; electrolyzing water to generate oxygen and hydrogen, wherein oxygen can be used as an oxygen source for oxygen-enriched combustion, coal gasification or other industrial purposes; feeding hydrogen and CO2 into a hydrogenation catalytic reactor, and reacting hydrogen and CO2 to generate methane (CH4) or methanol (CH3OH) according to demands; collecting catalysis reaction heat by using a heat exchanger so as to obtain steam, wherein a part of the steam is used for generating power, and the other part of steam is used for driving a compressor (for compressing H2, O2 and CH4) to do work; if CH4 is generated, separating the gas discharged from the outlet of the catalytic reactor so as to obtain high-purity methane (CH4), and compressing the high-purity methane so as to be used as an industrial and living gas, and if the catalytic product is methanol, utilizing the methanol as an industrial raw material.

Description

technical field [0001] The invention relates to a carbon dioxide recycling method based on non-grid-connected wind power, and belongs to the field of carbon dioxide recycling. Background technique [0002] Since the industrial revolution, due to the large-scale utilization of fossil fuels, the carbon dioxide content in the atmosphere has risen rapidly, causing the destruction of the carbon cycle on the earth. The carbon dioxide content in the atmosphere has increased from about 280ppm before the industrial revolution to nearly 400ppm today. With the progress of global industrialization, the carbon dioxide content in the atmosphere will continue to increase. According to the annual analysis report of the Global Carbon Project, carbon dioxide emissions reached a record 35 billion tons in 2012, 58% higher than the benchmark year 1990 for measuring greenhouse gas emission levels. [0003] The increase in carbon dioxide emissions in the atmosphere is the root cause of global cli...

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Problems solved by technology

[0011] Another problem with carbon dioxide hydrogenation catalysis is the source of hydrogen. The current large-scale hydrogen production methods include coal gasification hydrogen production, natural gas, and petroleum cracking hydrogen production. These two methods will increase carbon dioxide emissions after hydrogen is produced, and cannot achieve carbon dioxide production. cycle

[0012] In the absence of enough peak-shaving units, the instability of the wind farm makes it impossible for wind power to contribute more than 10% to the grid, and wind power needs to be adjusted to the same voltage, cycle rate, waveform, Phase sequence, active and reactive power must be adjusted to meet the most basic grid-connected requirements of the grid, and the complex control system increases the cost of wind turbines

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