US 12,449,122 B2
Free-jet burner and method for low CO2, NOx, and CO emissions
Darton J Zink, Tulsa, OK (US); Rex K Isaacs, Collinsville, OK (US); Eric G Pratchard, Tulsa, OK (US); John Petersen, Pawnee, OK (US); Tim Kirk, Morris, OK (US); Austin White, Tulsa, OK (US); and Zach Chandler, Tulsa, OK (US)
Assigned to ZEECO, INC., Broken Arrow, OK (US)
Filed by ZEECO INC., Broken Arrow, OK (US)
Filed on Nov. 14, 2022, as Appl. No. 17/986,326.
Prior Publication US 2024/0159392 A1, May 16, 2024
Int. Cl. F23D 14/32 (2006.01)
CPC F23D 14/32 (2013.01) [F23D 2203/005 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A burner for providing low emissions in a heating system having a flue gas therein, the burner comprising:
a burner wall having a longitudinal axis and a forward end;
an interior passageway of the burner wall for a flow of air or other oxygen-containing gas out of the forward end of the burner wall;
the forward end of the burner wall having a surrounding outer perimeter which measures a total of from 32 to 240 inches around the longitudinal axis of the burner wall;
a series of ejector tips spaced around the longitudinal axis of the burner wall, a total number of the ejector tips of the series being not less than three and not more than six and the ejector tips of the series being positioned longitudinally rearward and laterally outward with respect to the surrounding outer perimeter of the forward end of the burner wall;
each of the ejector tips of the series comprising a center ejection port, a right ejection port, and a left ejection port which are each oriented to eject a fuel stream in free-jet flow toward the surrounding outer perimeter of the forward end of the burner wall and/or toward a location on the burner wall which is different from the surrounding outer perimeter of the forward end of the burner wall;
the fuel stream ejected from the center ejection port of each of the ejector tips of the series being a center fuel stream, the fuel stream ejected from the right ejection port of each of the ejector tips of the series being a right fuel stream, and the fuel stream ejected from the left ejection port of each of the ejector tips of the series being a left fuel stream;
for each of the ejector tips of the series, the right ejection port also being oriented to eject the right fuel stream at an angle away from the center fuel stream on a right side of the center fuel stream, and the left ejection port also being oriented to eject the left fuel stream at an angle away from the center fuel stream on a left side of the center fuel stream; and
for each of the ejector tips of the series, a distance along the surrounding outer perimeter of the forward end of the burner wall from (i) a lateral midpoint of the right fuel stream at the surrounding outer perimeter of the forward end of the burner wall to (ii) a lateral midpoint of the left fuel stream at the surrounding outer perimeter of the forward end of the burner wall being equal to from one eighth to one third of the surrounding outer perimeter of the forward end of the burner wall.