Combustor for medium-high temperature solid fuel cell and application thereof

Abstract

The invention belongs to the field of fuel cells, and particularly discloses a combustor for a medium-high temperature solid fuel cell and an application thereof. An air inlet and a fuel inlet are arranged at an inlet end of a static mixing cavity in the combustor and are used for mixing air and fuel to obtain mixed gas; a shunting orifice plate is connected with an outlet end of the static mixingcavity to provide a buffer area for the mixed gas and shunt the mixed gas; a metal mesh structure is connected with the shunting orifice plate, so that the phenomena of tempering and flamelifting areprevented; a combustion chamber is arranged on the outer side of the static mixing cavity and provides a space for mixed gas combustion; and a pulse igniter is arranged above the metal mesh structureand used for igniting the mixed gas. According to the combustor, the shunting orifice plate is utilized to provide the buffer area for the high-flow-rate mixed gas, meanwhile, flame generated by combustion is divided into a plurality of fine flame flows by utilizing the metal mesh structure, and stable gas flow and temperature gradient are formed, so that the phenomena of the tempering and flamelifting are prevented.

Description

technical field [0001] The invention belongs to the field of fuel cells, and more specifically relates to a burner for medium-high temperature solid fuel cells and its application. Background technique [0002] A solid oxide fuel cell (SOFC) is a power generation device that directly and efficiently converts chemical energy stored in fuel and oxidant into electrical energy. During the working process, the fuel is converted into synthesis gas (H 2 and CO), the synthesis gas and the unreacted anode exhaust gas in the anode of the battery pack, the heat generated by combustion in the combustion chamber can be provided to the fuel stack and steam reformer to maintain the electrochemical and reforming reactions. [0003] When SOFC works and supplies power, due to the high water-to-carbon ratio (2-3) and the introduction of a large amount of air in the reforming process, the mixed gas fuel concentration entering the combustion chamber is thin (5%-12%) and the excess air ratio is ...

AI Technical Summary

Problems solved by technology

From the point of view of actual operation, the unstable phenomenon of backfire and defire has not been effectively controlled, which seriously affects the healthy operation of fuel cells

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