METHOD FOR REDUCING NOx EMISSION
AssigneeTechnip France
InventorsIzaak Jacobus Risseeuw, Johannes Antonie de Jager, Jelle-Gerard Wijnja
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Abstract
The invention is directed to a method for reducing NOx emission from an industrial process furnace comprising a firebox containing a burner and a tube, which method comprises subjecting an oxidant gas and/or a fuel gas (1) to humidification, thereby obtaining a humidified gas; and pre-heating the humidified gas with an external waste heat stream (20) before feeding the gas to the burner.
Claims20
Method for reducing NOx emission from a process furnace comprising a firebox containing a burner and a tube, the method comprising:
- subjecting an oxidant gas and/or a fuel gas to humidification, thereby obtaining a humidified gas;
- and
- superheating the humidified gas with an external waste heat stream before feeding the gas to the burner.
Method for combusting fuel gas with oxidant gas in a process furnace comprising a firebox containing a burner and a tube, the method comprising:
- subjecting an oxidant gas and/or the fuel gas to humidification, thereby obtaining a humidified gas;
- and
- superheating the humidified gas with an external waste heat stream before feeding the gas to the burner.
Method for heating a tube comprising process gas to a temperature above 500° C. in a process furnace comprising a firebox containing a burner and the tube, the method comprising:
- subjecting an oxidant gas and/or a fuel gas to humidification, thereby obtaining a humidified gas;
- and
- superheating the humidified gas with an external waste heat stream before feeding the gas to the burner.
Method according to claim 16, wherein the pre-heating is conducted in an air pre-heater system comprising either a forced-draught fan or an induced-draught fan or both.
Dependencies are inferred from the claim text.