Supercritical carbon dioxide combined with organic Rankine cycle power generation system driven by pressurized oxygen-rich fluidized bed

Abstract

The invention discloses a supercritical carbon dioxide combined with an organic Rankine cycle power generation system driven by a pressurized oxygen-rich fluidized bed The supercritical carbon dioxidecombined with the organic Rankine cycle power generation system driven by the pressurized oxygen-rich fluidized bed comprises an air separation oxygen generation unit, a supercritical carbon dioxidepower generation unit driven by the pressurized oxygen-rich fluidized bed, and an organic Rankine cycle unit and a carbon dioxide compression trap unit driven by a waste heat boiler, and the air separation oxygen generation unit, the supercritical carbon dioxide power generation unit driven by the pressurized oxygen-rich fluidized bed and the organic Rankine cycle unit and a carbon dioxide compression trap unit driven by the waste heat boiler are connected in sequence The supercritical carbon dioxide combined with the organic Rankine cycle power generation system driven by the pressurized oxygen-rich fluidized bed adopts the pressurized oxygen-rich fluidized bed as a coal combustion reactor, and uses the supercritical carbon dioxide cycle as a top cycle to generate electricity externally,and combines with the organic Rankine cycle as a bottom cycle to perform external work and directly used for carbon dioxide compression. Therefore, the pressure matching of a combustion system is significantly improved, the power generation efficiency of thermal cycle is improved, the energy consumption of carbon dioxide compression is reduced. Under the premise of not reducing the operating efficiency and economic benefits of the whole system, conventional nitrogen and sulfur pollutants is controlled, and carbon dioxide can be collected nearly zero emissions in the process of coal-fired powergeneration is achieved.

Description

technical field [0001] The invention belongs to the field of coal clean and high-efficiency power generation, and specifically relates to a supercritical carbon dioxide combined organic Rankine cycle power generation system driven by a pressurized oxygen-enriched fluidized bed. Background technique [0002] my country is a big country of coal production and consumption, and the basic pattern of power production dominated by coal power is difficult to change in the short term. Existing thermal power units have no effective control means for the large amount of carbon dioxide emitted during the coal combustion process. At present, my country's coal-fired power plants emit about 40% of the country's total carbon dioxide emissions. Under the international background of coping with climate change and vigorously reducing carbon dioxide emissions, it is urgent to develop efficient carbon dioxide capture technology for my country's coal-fired thermal power generation process. [0...

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Problems solved by technology

[0003] Among the existing carbon capture technologies, the oxy-fuel combustion technology has significant advantages for post-combustion capture, but the oxy-fuel combustion system adds an air separation oxygen production unit and a carbon dioxide purification and compression unit, and the pressure does not match the coal combustion unit, resulting in The net cycle efficiency of the system is 12% lower than that of conventional air combustion

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