Method for operating a gas burner

By extending the recirculation vortex to a cooled heat exchanger, the method addresses flashback and nitrogen oxide issues in hydrogen combustion, ensuring stable and efficient operation.

EP4295082B1Active Publication Date: 2026-04-22VIESSMANN HOLDING INTERNATIONAL GMBH
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
VIESSMANN HOLDING INTERNATIONAL GMBH
Filing Date
2022-02-10
Publication Date
2026-04-22

AI Technical Summary

Technical Problem

Existing gas burners struggle to efficiently combust non-carbonous gases like hydrogen without causing flashback or premature combustion interruption, leading to high carbon monoxide emissions.

Method used

The method involves controlling the flow rate and distance of the mixture to extend the recirculation vortex to a fluid-cooled heat exchanger, cooling it there to prevent flashback and reduce nitrogen oxide levels.

Benefits of technology

Effectively prevents flashback and reduces nitrogen oxide emissions while maintaining stable combustion with hydrogen as fuel, even with high burner modulation.

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Abstract

The invention relates to a method for operating a gas burner, in which method: a mixture is formed from a fuel gas and air in a mixing chamber (1); the mixture is conveyed at a controlled feed rate through an outlet opening (2) in a burner surface (3) delimiting the mixing chamber (1); the mixture is combusted at the burner surface (3) to form a recirculation vortex; and exhaust gas forming during the combustion is brought into contact with a fluid-cooled heat exchanger (4) located at a distance from the outlet opening (2). According to the invention, the feed rate for the mixture and the distance between the outlet opening (2) and the heat exchanger (4) are selected in such a way that the recirculation vortex extends from the outlet opening (2) to the heat exchanger (4) and is cooled down at the heat exchanger (4).
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Citation Information

Patent Citations

  • Boiler and method for the generation of heat through the combustion of at least one fuel

    EP3467383A1