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AssigneesL'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude, American Air Liquide, Inc.
InventorsOvidiu Marin, Benjamin Bugeat, Eric Streicher, Pietro Di Zanno
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Methods and apparatus for combustion of a hydrocarbon fuel in a combustion chamber of a furnace or boiler are presented, the combustion normally using only air as an oxidant, part of the air entering the combustion chamber through one or more burners, and a remaining portion of air entering the combustion chamber at a plurality of locations downstream of the burners. The methods comprise injecting oxygen-enriched gas through a plurality of lances into the combustion chamber at a plurality of downstream locations, the oxygen-enriched gas injected at a velocity ranging from subsonic to supersonic, and the oxygen-enriched gas being present in an amount sufficient to provide an oxygen concentration of no more than 2% on a volume basis greater than when air is used alone as oxidant.
A method of increasing combustion of a hydrocarbon fuel in a combustion chamber, the combustion normally using only air as an oxidant, part of the air entering the combustion chamber near one or more hydrocarbon fuel burners, and a remaining portion of air entering the combustion chamber at a plurality of locations downstream of said hydrocarbon fuel burners, the method comprising the steps of injecting an oxygen-enriched gas at a velocity through a plurality of lances into a flue gas in the combustion chamber at said plurality of lances downstream of said burners, wherein the oxygen-enriched gas has an oxygen concentration of no more than 2% on a volume basis greater than that of air.
A method of increasing combustion of coal in a combustion chamber, the combustion normally using only air as an oxidant, part of the air entering the combustion chamber near one or more coal burners, and a remaining portion of air entering the combustion chamber at a plurality of locations downstream of said coal burners, the method comprising the steps of injecting an oxygen-enriched gas at a velocity through a plurality of lances into a flue gas in the combustion chamber at said plurality of lances downstream of said burners, wherein the oxygen-enriched gas has an oxygen concentration of no more than 2% on a volume basis greater than that of air.
A method of increasing combustion of a hydrocarbon fuel in a combustion chamber, said method comprising the steps of:
A method of increasing combustion of coal in a combustion chamber, said method comprising the steps of:
Dependencies are inferred from the claim text.