Photocatalytic reactor for synergistic desulfurization of hydrocarbon fuel prepared from oxygen-enriched flue gas and method

Abstract

The invention belongs to the related technical field of flue gas purification, and discloses a photocatalytic reactor for synergistic desulfurization of hydrocarbon fuel prepared from oxygen-enrichedflue gas and a method. Sulfur dioxide gas in to-be-treated gas is converted into sulfite ions in a first reactor, and ion exchange channels are arranged between the first reactor and a second reactorand between the second reactor and a third reactor and used for exchanging ions in the reactors to keep charge balance and mass balance; an ion exchange membrane is arranged in the ion channel betweenthe first reactor and the second reactor, sulfite ions enter the second reactor through the ion exchange membrane and are subjected to a photocatalytic reaction in the second reactor to be oxidized into sulfate ions, and desulfurization is achieved; the carbon dioxide gas in the to-be-treated gas enters the third reactor to be subjected to a photocatalytic reduction so as to be converted into hydrocarbon, and treatment of the carbon dioxide is achieved. According to the photocatalytic reactor and method of the invention, hydrocarbon fuel preparation and desulfurization are carried out at thesame time, and the treatment efficiency is high.

Description

technical field [0001] The invention belongs to the technical field related to flue gas purification, and more specifically relates to a photocatalytic reactor and method for synergistic desulfurization of hydrocarbon fuels produced from oxygen-enriched flue gas. Background technique [0002] A large amount of CO is released during the utilization of coal 2 , greatly accelerating the process of global warming. Coal-fired power plants are my country's CO 2 The largest and most concentrated source of emissions. Among them, the oxygen-enriched combustion power plant uses the mixed gas composed of pure oxygen obtained from air separation and a part of boiler exhaust gas instead of air as the oxidant of coal combustion, which can make the CO in the flue gas formed by coal combustion 2 The content reaches more than 85%, which is a good CO 2 source. Due to the use of flue gas circulation, SO in the flue gas of oxy-fuel combustion 2 Pollutants such as pollutants will be enrich...

AI Technical Summary

Problems solved by technology

Due to the use of flue gas circulation, SO in the flue gas of oxy-fuel combustion 2 Pollutants such as pollutants will be enriched, and the traditional wet desulfurization technology still has the disadvantages of high energy consumption and high cost

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