Zero-carbon emission three-cycle integral coal gasification fuel cell electricity generation system and method

Abstract

The invention provides a zero-carbon emission three-cycle integral coal gasification fuel cell electricity generation system and method. The zero-carbon emission three-cycle integral coal gasificationfuel cell electricity generation system comprises a coal preparation unit, a gasification furnace, a waste heat boiler, a circulating gas compressor, a first gas-gas heater, a water-washing tower, asecond gas-gas heater, a carbonyl sulfur hydrolysis reactor, a desulfurization unit, a humidifier, an ejector, a fuel cell, a pure oxygen combustor, a gas turbine, an air compressor, a cathode heat regenerator, an air turbine, a waste heat boiler, a steam turbine, a first carbon dioxide compressor, a second carbon dioxide compressor, a cryogenic air separation unit and an oxygen compressor. According to the zero-carbon emission three-cycle integral coal gasification fuel cell electricity generation system, a three-cycle electricity generation system is formed, one serves as the fuel cell to generate electricity, the second is gas turbine to generate electricity, the third serves as a steam engine to generate electricity, energy gradient utilization is realized to the maximum extent from the two aspects of chemical energy and physical energy.

Description

technical field [0001] The invention belongs to the technical field of clean coal power generation, and in particular relates to a zero-carbon emission three-cycle integral coal gasification fuel cell power generation system and method. Background technique [0002] Coal is the most important basic energy in my country, and its status will not change for a long time in the future. my country's coal-fired power generation technology has made great progress after more than ten years of hard work. The coal consumption of a million-kilowatt double-reheated ultra-supercritical coal-fired power generation unit can reach 265 grams / kWh, which is in the leading position in the world. Pollutants The emission indicators of the company continue to improve, and the ultra-low emission pollutant control technology can control the main pollutants of coal-fired units to the emission level of natural gas combined cycle power generation. my country built and put into operation the first 250,00...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a zero-carbon emission three-cycle integrated coal gasification fuel cell power generation system and method, which solves the defect that the existing ultra-supercritical coal-fired power generation unit and IGCC are difficult to reach the carbon emission index. The present invention Can further improve the net power generation efficiency of coal-based power generation system

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