Coal-based fuel chemical-looping combustion power generation system and method based on supercritical carbon dioxide

Abstract

The invention provides a coal-based fuel chemical-looping combustion power generation system and method based on supercritical carbon dioxide. Power generation efficiency is high, emission of nitrogen oxides is low, carbon dioxide is easy to gather, and furthermore, a chemical-looping combustion technology and supercritical carbon dioxide circular power generation are combined organically. The system comprises a chemical-looping combustion system and a supercritical carbon dioxide circular power generation system; the chemical-looping combustion system comprises an air reactor and a combustion reactor; and the supercritical carbon dioxide circular power generation system comprises a carbon dioxide turbine, a carbon dioxide compressor and a generator, and the carbon dioxide compressor and the generator are both connected with the driving end of the carbon dioxide turbine. The chemical-looping combustion technology and the supercritical carbon dioxide circular power generation are combined, while power generation is realized by supercritical carbon dioxide, the carbon dioxide is gathered and recycled, and part of the gathered carbon dioxide can also be supplemented into the supercritical carbon dioxide circular system after being pressurized to compensate for part of leakage in the circular system.

Description

technical field [0001] The invention relates to the field of advanced and high-efficiency thermal power generation, in particular to a coal-based fuel chemical chain combustion power generation system and method based on supercritical carbon dioxide. Background technique [0002] In my country, coal-fired thermal power generation is one of the largest sources of carbon dioxide emissions. Research and development of new coal-based fuel power generation technology is of great significance to the clean and efficient use of coal resources in my country and the reduction of carbon dioxide emissions. The current coal-fired carbon dioxide recovery methods include pre-combustion capture, combustion capture, and post-combustion capture. Although coal-fired carbon dioxide can be recovered, obtaining high-concentration carbon dioxide will significantly reduce the power generation efficiency of the power generation system. The chemical loop combustion technology realizes the non-mixed c...

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Problems solved by technology

However, in the published reports about coal-based fuel supercritical carbon dioxide cycle power generation are all based on traditional air combustion and non-contact indirect heat exchange, such as Chinese patents CN 104727868A and CN 105526576A, etc., have not yet used chemical loop combustion Combined with supercritical carbon dioxide cycle power generation report

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