Development of a low-NOx hydrogen burner using high pressure injection nozzles

Abstract

To achieve the global goal of decarbonization, use of hydrogen in place of fossil fuels is expected to increase worldwide. In this study, to establish a hydrogen combustion technology of boilers for a safe, low NOx and low cost, a combustion test of a hydrogen burner was carried out in a large model furnace, and it was confirmed that supplying hydrogen fuel to the burner at a high pressure that has never been used before reduces NOx. In addition, the mechanism of NOx reduction by increasing the supply pressure was newly clarified by the numerical analysis (LES) of hydrogen combustion field. The high-pressure hydrogen supply was also effective for the cost reduction, and the prospect of the application to the actual use of the hydrogen burner was obtained.

Keywords

• hydrogen
• boiler
• burner
• nox
• carbon free
• hydrogen firing
• high pressure fuel supply