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US 5,271,729 AGranted
Inspirated staged combustion burner
AssigneeSelas Corporation of America
InventorsWayne C. Gensler, John J. Van Eerden, Chad F. Gottschlich
Life of this patent
Estimating the term…
Abstract
A low NOx gaseous fuel burner that creates a wall hugging flame, even in a cup. It is comprised of two staged premix units, one unit, in a cup, running very lean and the second unit, extended into the furnace, running very rich, the combination being stoichiometric.
Claims13
A gaseous fuel burner comprising:
- a burner body having a burner tip installed in a wall of a furnace having a combustion zone for gaseous fuel therein;
- a first stage mixing means for mixing primary gaseous fuel and primary air as a premix, a first stage supply means for introducing said first stage premix of primary gaseous fuel and primary air forwardly along said burner body, a first stage premix port means extending into said furnace for supplying said first stage premix radially outwardly approximately adjacent to said wall to deliver said first stage premix substantially along said wall in said combustion zone;
- a second stage mixing means for mixing primary gaseous fuel and primary air as a separate premix, a second stage supply means for introducing said second stage premix of primary gaseous fuel and primary air forwardly along said burner body, a second stage premix port means positioned in said combustion zone for separately supplying said second stage premix radially outwardly into the furnace from a predetermined location remote from said wall and separated along said burner from said first stage premix port means;
- and
- control means for independently controlling the fuel-to-air ratio of the premix in each of said first and second stages.
2 more elements
A gaseous fuel burner comprising:
- a burner body having a burner tip installed in a wall of a furnace having a combustion zone for gaseous fuel therein;
- a first stage mixing means for mixing primary gaseous fuel and primary air as a premix, a first stage supply means for introducing said first stage premix of primary gaseous fuel and primary air forwardly along said burner body, a first stage premix port means positioned for supplying said first stage premix radially outwardly approximately adjacent to said wall in said combustion zone to direct said first stage premix substantially along said wall;
- a second stage mixing means for mixing primary gaseous fuel and primary air as a separate premix, a second stage supply means for introducing said second stage premix of primary gaseous fuel and primary air forwardly along said burner body, a second stage port means positioned in said combustion zone for separately supplying said second stage premix radially outwardly into the furnace from a predetermined location remote from said wall and separated along said burner from said first stage premix port means;
- means for supplying and directing secondary air approximately adjacent to said furnace wall and said first stage port means in said combustion zone;
- and
- means for independently controlling and predetermining air-to-fuel ratios of said first stage premix and said second stage premix.
3 more elements
Dependencies are inferred from the claim text.