Overall gasification fuel cell power generation system and method adopting supercritical CO2 bottom circulation

An integrated coal gasification and fuel cell technology, which is applied in the gasification process, the manufacture of combustible gas, the production of bulk chemicals, etc., can solve the problems of low bottom cycle efficiency, and achieve the advantages of simple system, improved power generation efficiency, and reduced equipment volume. Effect

Pending Publication Date: 2019-01-25
HUANENG CLEAN ENERGY RES INST
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Problems solved by technology

[0005] The object of the present invention is to provide a method using supercritical CO 2 The integrated coal gasification fuel cell power generation system and method of bottoming cycle solve the problem of low bottoming cycle efficiency in the existing IGFC system

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  • Overall gasification fuel cell power generation system and method adopting supercritical CO2 bottom circulation

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] Such as figure 1 As shown, a kind of adopting supercritical CO provided by the present invention 2 The overall coal gasification fuel cell power generation system with bottom cycle includes coal preparation unit 1, gasifier 2, gas cooler 3, dust removal unit 4, circulating gas compressor 5, first gas heater 6, water washing tower 7, second Gas heater 8, carbonyl sulfide hydrolysis reactor 9, low temperature waste heat recovery unit 10, cooler 11, desulfurization unit 12, humidifier 13, water treatment unit 14, sulfur recovery unit 15, injector 16, fuel cell 17. Cathode air compressor 18, cathode regenerator 19, compressor 20, pure oxygen burner 21, CO 2 Gas turbine 22, regenerator 23, waste heat boiler 24, tail gas condenser 25, gas-water separator 26, CO 2 Compressor 27, CO 2 Condenser 28, CO 2 Booster pump 29, steam turbine 30, cryogenic air sep...

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Abstract

The invention provides an overall gasification fuel cell power generation system and method adopting supercritical CO2 bottom circulation. The system comprises a coal preparation unit, a gasifier, a gas cooler, a circulation gas compressor, an ejector, a fuel cell, a cathode air compressor, a cathode backheating device, a compressor, a pure oxygen burner, a CO2 gas turbine, a backheating device, awaste heat boiler and a turbine; on the basis of the overall gasification fuel cell power generation system, CO2 gathering is added, a CO2 cooling pressurizing device is utilized for converting CO2 gas into supercritical state CO2, supercritical state CO2 is adopted as bottom circulation to react with pure oxygen and tail gas at a fuel cell anode outlet inside the pure oxygen burner, generated high temperature and high pressure gas acts and generates electricity in the CO2 gas turbine; according to the structure, on the basis of efficient electricity generation of fuel cell electricity generation, the electricity generation efficiency is further improved; meanwhile, the system has the CO2 gathering function, and coal power generation CO2 emission reduction can be achieved efficiently withlow cost.

Description

technical field [0001] The invention belongs to the technical field of clean coal power generation, in particular to an integrated coal gasification fuel cell power generation and supercritical CO 2 cycle power generation system. Background technique [0002] The integrated coal gasification fuel cell power generation system IGFC is a power generation system that combines coal gasification power generation technology with high-temperature fuel cells. Its energy conversion efficiency is not limited by the Carnot cycle efficiency. Zero emission is an important development direction of clean coal power generation technology. [0003] The supercritical carbon dioxide cycle power generation system is a new type of power generation technology. It is a Brayton cycle system with supercritical carbon dioxide as the working medium. The cycle process is: first, supercritical carbon dioxide is boosted by a compressor; The working medium is heated isobarically; secondly, the working me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/72C10J3/86
CPCC10J3/72C10J3/86C10J2300/165C10J2300/1807C10J2300/1612Y02P20/129Y02P20/54
Inventor 周贤彭烁许世森钟迪李启明王保民
Owner HUANENG CLEAN ENERGY RES INST
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