Tail gas burner

Abstract

The invention discloses a tail gas burner. The tail gas burner comprises an on-duty flame nozzle, a tail gas nozzle component arranged on the periphery of the on-duty flame nozzle, a combustion chamber arranged behind the on-duty flame nozzle and the tail gas nozzle component, and a secondary air countercurrent channel arranged at the outer side of the combustion chamber and communicated with the combustion chamber, wherein a tail gas nozzle is arranged at the rear end of the tail gas nozzle component and comprises an anode tail gas channel and a cathode tail gas channel, and stable combustion of tail gas sprayed out of the tail gas nozzle is achieved by controlling the burning degree of the on-duty flame nozzle. According to the tail gas burner, the on-duty flame nozzle is arranged in the center of the tail gas burner, the tail gas nozzle component is arranged on the periphery of the on-duty flame nozzle, the on-duty flame nozzle can ignite tail gas at the outer side, and then the purpose of organizing the tail gas to conduct stable burning by controlling the burning degree of the on-duty flame nozzle is achieved.

Description

technical field [0001] The invention relates to the technical field of combustion, in particular to an exhaust gas burner which can be used for fuel cells. Background technique [0002] Fuel cells can directly convert the chemical energy of fuel into electrical energy without being limited by the Carnot cycle effect, and belong to a high-efficiency power generation technology. During the use of the fuel cell, combustible gases such as hydrogen and carbon monoxide (ie, anode tail gas) will be discharged from the anode, and a mixture of oxygen and nitrogen (ie, cathode tail gas) will also be discharged from the cathode. Since both the anode tail gas and the cathode tail gas have high heat enthalpy, in order to improve the power generation efficiency of the fuel cell and meet the requirements of environmental protection, the exhaust gas from the fuel cell is generally treated by combustion of the tail gas. At the same time, the solid oxide During the normal power generation op...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing tail gas burner cannot organize the tail gas, especially the tail gas with low calorific value. When the component parameters change, it can carry out stable combustion, and then It is impossible to eliminate safety hazards such as flameout and backfire during the tail gas combustion process. In addition, it takes into account the combustion of fuel when the reformer starts

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