Integrated gasification fuel cell power generation system and method utilizing coal water slurry gasification

An integrated coal gasification and fuel cell technology, which is applied in the direction of fuel cells, gasification process, and the manufacture of combustible gas, can solve the problems of complex system, high CO content, and large energy loss, so as to achieve simple process, avoid energy loss, and improve The effect of net power generation efficiency

CN110257106APending Publication Date: 2019-09-20HUANENG CLEAN ENERGY RES INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-09-20

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Abstract

The invention provides an integrated gasification fuel cell power generation system and method utilizing coal water slurry gasification. The integrated gasification fuel cell power generation system comprises a coal preparation unit, a gasification furnace, an exhaust heat boiler, a dedusting unit, a first gas-gas heater, a desulfurizing device, an ejector, a fuel cell, a pure oxygen combustor, a gas turbine, a cathode air compressor, a first waste heat recovery exchanger, a cathode heat regenerator, an air turbine, a steam turbine, a waste heat boiler and a deep cooling air separation unit. The integrated gasification fuel cell power generation system utilizing the coal water slurry gasification has the advantages that the ratio of hydrogen to carbon entering the fuel cell is moderate, so that the ratio of the hydrogen to the carbon needs not to be adjusted by a CO water gas shift reaction unit or by tail gas recycling; since a coal water slurry gasification system is simple, the integrated gasification fuel cell power generation system is simple in process; since a water-gas conversion process is omitted, energy loss caused by the water-gas conversion process is avoided, and net power generating efficiency of the integrated gasification fuel cell power generation system is improved.
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Description

technical field

[0001] The invention belongs to the technical field of clean coal power generation, and in particular relates to an integrated coal gasification fuel cell power generation system and method using coal-water slurry gasification. Background technique

[0002] Coal is the most important basic energy in our country. Under the current technical level, it is difficult for supercritical coal-fired power generation units and integrated coal gasification combined cycle unit IGCC to achieve lower carbon emission targets. Carbon capture using existing technologies or technologies that are feasible in the near future will not only greatly increase equipment investment, but also significantly reduce power generation efficiency.

[0003] 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 lim...

Examples

Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] Such as figure 1 As shown, an integrated coal gasification fuel cell power generation system using coal water slurry gasification provided by the present invention includes a coal preparation unit 1, a gasification furnace 2, a waste heat boiler 3, a dust removal unit 4, and a first gas heater 5 , water washing tower 6, second gas heater 7, carbonyl sulfide hydrolysis reactor 8, low temperature waste heat recovery unit 9, synthesis gas cooler 10, desulfurization unit 11, fine desulfurization unit 12, humidifier 13, water treatment unit 14 , sulfur recovery unit 15, ejector 16, fuel cell 17, pure oxygen burner 18, gas turbine 19, cathode air compressor 20, first waste heat recovery heat exchanger 21, cathode regenerator 22, air ventilation Flat 23, steam turbine 24, waste heat boiler 25, first waste heat recovery heat exchanger 26, carbon dioxide multi...