Combustor having fuel cell tail gas catalytic combustion function, and applications thereof

Abstract

The present invention relates to a combustor used for an anode support pipe type solid oxide fuel cell power generation system and having a fuel cell tail gas catalytic combustion function. The combustor comprises a porous ceramic catalytic combustion pipe, a high-temperature fuel pipe, a shell, a thermal insulation wrap and a high-temperature-resistant separation plate, wherein a combustion chamber is communicated to an air tail gas collection chamber through an air tail gas flow channel pipe, fuel gas penetrates through the combustor through the high temperature fuel pipe at a fuel gas common flow chamber, and reaches a pipe type battery, fuel tail gas enters the catalytic combustion pipe from a fuel collection chamber through the gap between the high-temperature-resistant separation plate and the high-temperature fuel pipe, and finally enters the combustion chamber, and the combustion chamber is filled with a combustion catalyst. According to the present invention, with the combustor, the tail gas is catalytically combusted to release the heat, the high-temperature fuel pipe is filled with the fuel reforming catalyst to catalytically reform the fuel gas, such that the heat coupling between the reforming reaction and the combustion reaction is achieved so as to substantially improve the power generation efficiency and the total energy utilization rate of the system.

Description

technical field [0001] The invention relates to a burner with the function of catalytic combustion of fuel cell tail gas and its application. The burner can be applied to an anode support tubular solid oxide fuel cell power generation system. The reforming of gas realizes the heat coupling of reforming reaction and combustion reaction, and improves the power generation efficiency and total energy utilization efficiency of the system. Background technique [0002] A solid oxide fuel cell (SOFC) is a power generation device that uses solid oxide as an electrolyte diaphragm to efficiently and cleanly convert the chemical energy of the fuel into electrical energy through an electrochemical reaction. Its power generation efficiency can reach more than 50%. The power supply efficiency is higher than 80%, and it is a new type of power generation device that reduces carbon dioxide emissions. Solid oxide fuel cells can not only use hydrogen fuel, but also use abundant and cheap natu...

AI Technical Summary

Problems solved by technology

However, directly passing natural gas to the anode reaction of the solid oxide fuel cell will cause carbon deposition on the anode, which will destroy the current conduction interface, reduce the performance of the electrocatalyst, affect the gas mass transfer in the electrode, and reduce the battery life.

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