A multi-cycle working fluid recovery flue gas waste heat oxygen-enriched combustion power generation integrated system

Abstract

The invention discloses a multi-circulating-medium flue gas waste heat recovery, oxygen-enriched combustion and power generation integrated system which comprises a water pump, a first heat exchanger,a steam turbine, a combustor, a gas turbine, a multi-flow heat exchanger, a second heat exchanger, a first gas-liquid separator, a first compressor, a third heat exchanger, a second gas-liquid separator, a second compressor, a liquid CO2 pump, an LNG pump, a third compressor, a first flow divider, a second flow divider, a third flow divider and a fourth flow divider. According to the multi-circulating-medium flue gas waste heat recovery, oxygen-enriched combustion and power generation integrated system disclosed by the invention, waste heat in flue gas can be sufficiently recovered by utilizing the difference among the boiling points of different working mediums; through the arrangement of the flow dividers in the multi-circulating-medium flue gas waste heat recovery, oxygen-enriched combustion and power generation integrated system, the composition ratio of three working mediums can be adjusted; and consequently, the amount of heat recovery can be improved by setting the optimum mixing ratio of the three working mediums, the system efficiency can be further optimized and improved at the optimum mixing ratio, waste heat from the combustion can be recovered to the greatest degree,and the zero-carbon emission of the multi-circulating-medium flue gas waste heat recovery, oxygen-enriched combustion and power generation integrated system can be achieved when the system power consumption is lowered.

Description

technical field [0001] The invention relates to an integrated power generation system for recovering flue gas waste heat in the electric power industry, and more specifically, to an integrated system for recovering flue gas waste heat and oxygen-enriched combustion power generation with multi-cycle working fluid. Background technique [0002] At present, climate warming has become a global problem, and CO 2 It is the gas with the greatest impact on climate change, and its warming effect accounts for 63% of the total warming effect of all greenhouse gases. Under the current severe environmental protection situation, the call for energy saving and emission reduction is becoming stronger and stronger, and countries all over the world are also seeking technologies to reduce CO 2 emission. Carbon capture and storage technology (Carbon Capture and Storage, CCS) is currently recognized as the most promising CO 2 One of the means of emission reduction, and oxy-fuel combustion tec...

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Problems solved by technology

[0004] Aiming at the defects and deficiencies of the prior art, the present invention provides a multi-cycle working medium recovery flue gas waste heat oxygen-enriched combustion power generation integrated system, which solves the problem of the incomplete recovery of flue gas generated by power generation in the prior art and the utilization efficiency of LNG cold energy. Low and technical issues of nitrogen oxide toxic gas emissions

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