Molten carbonate fuel cell system combined with CO2 capture and working method thereof

A technology of fuel cell system and molten carbonate, which is applied in the direction of molten electrolyte fuel cells, fuel cells, fuel cell additives, etc., and can solve the problems of low purification efficiency

CN112820915APending Publication Date: 2021-05-18HUANENG POWER INTERNATIONAL +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-05-18

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Abstract

The invention discloses a molten carbonate fuel cell system combined with CO2 capture and a working method thereof, and belongs to the technical field of fuel cells. The system mainly comprises a methanol reforming hydrogen production unit, a first heat exchange unit, a gas-liquid separation unit, a mixing device, a CO2 capture unit, a second heat exchange unit, a third heat exchange unit and a fuel cell unit. Methanol reformed gas is used as a fuel, a CO2 capture technology is utilized and anode tail gas circulation is combined, so that CO2 separation efficiency and fuel utilization rate can be improved, power generation cost of the molten carbonate fuel cell is reduced, tail gas waste heat can be utilized to preheat inlet gas, thermoelectric comprehensive efficiency of a power generation system of the molten carbonate fuel cell is improved. The power generation cost of the molten carbonate fuel cell is reduced, and the application prospect is good.
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Description

technical field

[0001] The invention belongs to the technical field of fuel cells, in particular to a fuel cell combined with CO 2 Captured molten carbonate fuel cell system and method of operation. Background technique

[0002] Molten carbonate fuel cell power generation is a way to achieve CO 2 The clean and efficient power generation method with near zero emissions can reduce the energy loss caused by the Carnot cycle and directly convert the chemical energy in the fuel into electrical energy.

[0003] Molten carbonate fuel cells do not use precious metals such as platinum as catalysts, so they do not need to use 99.99% pure hydrogen as fuel, and have the characteristics of wide fuel sources. For example, methanol reforming can be used to produce hydrogen, and then the hydrogen in the reformed gas can be purified to obtain hydrogen-rich gas, which can be used as fuel cell anode fuel. Methanol reformed gas mainly contains hydrogen and carbon dioxide, but most of the hyd...

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with accompanying drawing, and its content is explanation of the present invention rather than limitation:

[0032] Such as figure 1 , for the binding CO of the present invention 2 Captured molten carbonate fuel cell system, including methanol reforming hydrogen production unit 1, first heat exchange unit 2, gas-liquid separation unit 3, mixing device 4, CO 2 A capture unit 5 , a second heat exchange unit 6 , a third heat exchange unit 8 and a fuel cell unit 9 .

[0033] The inlet of the methanol reforming hydrogen production unit 1 is connected with a methanol feed pipe, the outlet of the methanol reforming hydrogen production unit 1 is connected to the inlet of the mixing device 4, and the outlet of the mixing device 4 is connected to the hot side inlet of the first heat exchange unit 2 , the hot side outlet of the first heat exchange unit 2 is connected to the gas-liquid separation unit ...