Double heat accumulation type high-temperature oxygen-deficient combustor with oxygen-enriched air supply

Abstract

The invention relates to a double heat accumulation type high-temperature oxygen-deficient combustor with oxygen-enriched air supply, belonging to the technical field of combustors. The combustor provided by the invention comprises a gas inlet / flue gas outlet, an oxygen-enriched air inlet / flue gas outlet, an oxygen-enriched air heat accumulator box, an oxygen-enriched air nozzle brick, a gas nozzle brick, a gas heat accumulator box, a gas nozzle, a flue gas circulating channel, an oxygen-enriched air and flue gas mixture nozzle, a flue gas reflux inlet and a flue gas reflux nozzle brick. The invention has the advantages that oxygen-enriched air is utilized to supply air, thereby reducing flue gas to bring waste heat and enhancing the heat transfer efficiency in a furnace; a heat accumulator is utilized to recycle the waste heat of the flue gas, thereby preheating combustion air and gas; simultaneously, high-temperature oxygen-deficient combustion conditions are realized through a special structural design; the oxidizing atmosphere in an industrial furnace is weakened to greatly reduce the oxidizing burn-out rate of a heated material, thereby solving the problems of high energy consumption, low yield and low emission of nitrogen oxides of the industrial furnace; and non-flammable fuel can be fully combusted.

Description

technical field [0001] The invention belongs to the technical field of burners, and provides a double regenerative high-temperature oxygen-depleted burner with oxygen-enriched air supply, so as to realize energy saving and consumption reduction of the burner, and at the same time reduce the emission of nitrogen oxides. Background technique [0002] In traditional combustion, air is used to support combustion. About 79% of the nitrogen in the combustion air does not participate in combustion, but forms smoke to take away part of the heat generated by combustion. The oxygen-enriched and pure oxygen combustion technology uses oxygen-enriched air or pure oxygen to support combustion, which reduces the nitrogen in the flue gas and fundamentally reduces the waste heat taken away by the flue gas; at the same time, it increases the triatomic molecules (CO 2 、H 2 The content of O) strengthens the radiation heat transfer in the furnace, improves the heat transfer efficiency in the fu...

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Problems solved by technology

[0004] Using enriched oxygen for the combustion of the regenerative burner, on the one hand, reduces the amount of flue gas to reduce the heat taken away by the flue gas; The increase in air oxygen content and preheating temperature further increases the fuel combustion temperature, further aggravating the problem of oxidation burn loss and nitrogen oxide production

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