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Submerged combustion burners and melters, and methods of use

  • US 9,777,922 B2
  • Filed: 05/22/2013
  • Issued: 10/03/2017
  • Est. Priority Date: 05/22/2013
  • Status: Active Grant
First Claim
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1. A fluid-cooled submerged combustion burner comprising:

  • a burner body (6) comprising an external conduit (10) and a first internal conduit (12) substantially concentric therewith, and positioned internal of the external conduit (10), the external conduit (10) comprising a first end, a second end, and a longitudinal bore (LB) having a longitudinal axis, the first internal conduit (12) comprising a first end, a second end, and a longitudinal bore having a longitudinal axis, and a second internal conduit (14) substantially concentric with, and positioned internal of the first internal conduit, the second internal conduit (14) comprising a first end, a second end, and a longitudinal bore having a longitudinal axis, the external conduit (10) and first internal conduit (12) forming a first annulus (11) there between for passing a cooling fluid, the first internal conduit (12) and the second internal conduit (14) forming a second annulus (13) there between for passing the cooling fluid, and a third internal conduit (15) configured to form a third annulus between the second (14) and third (15) internal conduits, the burner body comprising fuel and oxidant inlet ports near the second ends of the conduits; and

    a burner tip (4) defined by an inner wall (28) and an outer wall (30) connected via a crown (32), the burner tip inner wall (28) and outer wall (30) are parallel to the longitudinal axis, the crown (32) having an arcuate interior surface configured to be cooled by a coolant fluid and an arcuate exterior surface configured to face material being melted by submerged combustion, the outer wall (30) removably fixed to the first end of the external conduit (10) via an outer connection, and the inner wall (28) removably fixed to the first end of the second internal conduit (14) via an inner connection, the burner tip (4) comprising a generally central burner tip flow passage configured to pass a combustible mixture therethrough, the generally central burner tip flow passage defined by the inner wall (28);

    wherein the arcuate exterior surface of the burner tip crown (32) comprises a first arcuate portion defining a symmetrical circumferential concavity (50) having a curvature orientation (A) defining an orientation angle (α

    ) between the longitudinal axis of the longitudinal bore of the external conduit and a first line that is normal to a tangent line at a vertex of the symmetrical circumferential concavity, orientation angle (α

    ) ranging from 0 degrees to about 45 degrees as measured in longitudinal cross-section, and second and third arcuate portions defining inner and outer crown rims (52, 54), at least the outer crown rim (54) extending above the circumferential concavity (50); and

    the crown (32) having a thickness (t1) measured in longitudinal cross-section on the first line, and from the first arcuate portion of the exterior surface to the arcuate interior surface of the crown (32), that is less than thicknesses (t3, t2), where(t3) is measured in the longitudinal cross-section on a second line that is normal to a tangent line of a vertex of the second arcuate portion of the exterior surface defining inner rim (52) to the arcuate interior surface of the crown (32), and(t2) is measured in the longitudinal cross-section on a third line that is normal to a tangent line of a vertex of the third arcuate portion of the exterior surface defining outer rim (54) to the arcuate interior surface of the crown (32).

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