Solid oxide fuel cell composite system and method of use

Abstract

The invention provides a solid oxide fuel cell composite system and its use method, including a power generation system and a carbon dioxide capture system. The power generation system includes a reformer, a battery stack, a vaporizer and a burner. The gas device is connected, the second input end of the reformer is connected with the vaporizer, the first output end of the reformer is connected with the battery stack; the first input end of the burner is connected with the fuel gas supply device, and the second input end of the burner is connected with the air; The inlet of the capture system communicates with the anode outlet of the battery stack, and the outlet of the capture system is selected from at least one of communicating with the burner, communicating with the reformer and directly evacuating. The invention separates the combustible components and generated water in the anode tail gas of the battery stack to realize the recycling of the combustible components; fully utilizes the high-grade heat energy of the fuel gas to drive the carbon dioxide capture system, and realizes the recovery of carbon dioxide on the basis of low or even zero energy consumption , enabling the system to generate electricity efficiently while achieving near-zero carbon dioxide emissions.

Description

technical field [0001] The invention belongs to the technical field of fuel cell power generation systems, and in particular relates to a solid oxide fuel cell composite system and a use method. Background technique [0002] A solid oxide fuel cell (SOFC) power generation system is a power generation device that converts chemical energy in fuel into electrical energy. SOFC can choose a wide range of fuels. Industrial hydrogen, natural gas, city gas, methanol, alcohol, diesel and some biofuels can be used in SOFC power generation systems directly or after simple treatment. Therefore, SOFC is recognized as a lap joint A bridge to a hydrogen society. Another outstanding advantage of SOFC is its high efficiency. Its electrical efficiency can reach 55%. If cogeneration of heat and power is realized, its efficiency can reach more than 80%, which is higher than any traditional generator or other types of fuel cells. [0003] Whether SOFC can achieve high power generation efficien...

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Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a solid oxide fuel cell composite system and its use method, which are used to solve the problem of low fuel utilization rate of the system and difficulty in fully and effectively utilizing the energy in the anode tail gas in the prior art. And other issues

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