초록 ▼

An improved low NOx burner assembly having a burner plate assembly which is attached to a burner head portion thereof, the burner plate assembly having a burner plate and a wrapper, the burner plate having a relatively large central aperture and a plurality of smaller apertures of several diametrica

An improved low NOx burner assembly having a burner plate assembly which is attached to a burner head portion thereof, the burner plate assembly having a burner plate and a wrapper, the burner plate having a relatively large central aperture and a plurality of smaller apertures of several diametrical sizes disposed at selected radial positions. The burner plate, attached to the burner head portion of the burner assembly via its wrapper, partially closes the outlet end of the burner head, and flame combustion is partially contained in a premixing chamber, thus effecting prolonged contact with combustion air prior to the gas and air mixture passing through the apertures of the burner plate.

대표청구항 ▼

[ What is claimed is:] [1.] A burner plate assembly which enables a modification of an existing gas burner assembly to reduce NOx emissions, wherein the gas burner assembly has an open burner head where a flame is formed in a combustion zone from combustion of a flammable gaseous mixture of fuel and

[ What is claimed is:] [1.] A burner plate assembly which enables a modification of an existing gas burner assembly to reduce NOx emissions, wherein the gas burner assembly has an open burner head where a flame is formed in a combustion zone from combustion of a flammable gaseous mixture of fuel and air, and wherein the burner plate assembly comprises:an annular wrapper attached to the burner head as an add-on attachment; anda burner plate supported by the wrapper, the burner plate having a central aperture transverse to the passageway and a first set of apertures in a concentric arrangement to the central aperture of a selected spacing and size, furthermore a second set of apertures in concentric arrangement to the central aperture of a different selected spacing and size, wherein the burner plate, the wrapper, and the burner head form an enclosed premixing chamber where the fuel and air are mixed prior to combustion, and the mixture passes through the burner plate to the combustion zone.