Submerged combustion burners

• US 10,131,563 B2
• Filed: 05/22/2013
• Issued: 11/20/2018
• Est. Priority Date: 05/22/2013
• Status: Active Grant

• Current Assignee: Johns Manville Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: Johns Manville Corporation (Berkshire Hathaway Incorporated)
• Inventors: Hegde, Subray R
• Primary Examiner(s): Dehghan, Queenie S
• Application Number:
  US14/778,206
• Publication Number:
  US 20160194232A1
• Time in Patent Office: 2,008 Days
• CPC Class Codes: C03B 2211/22 by direct combustion in the melt
• CPC Class Codes: C03B 2211/60 oxy-fuel burner construction
• CPC Class Codes: C03B 5/2353 by combustion with pure oxygen or oxygen-enriched air, e.g. using oxy-fuel burners or oxygen lances
• CPC Class Codes: C03B 5/2356 Submerged heating, e.g. by using heat pipes, hot gas or submerged combustion burners bubblers C03B5/193
• CPC Class Codes: F23D 14/22 with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
• CPC Class Codes: F23D 14/76 Protecting flame and burner parts
• CPC Class Codes: F23D 14/78 Cooling burner parts
• CPC Class Codes: F23D 2212/20 metallic
• CPC Class Codes: F23D 2213/00 Burner manufacture specifications
• CPC Class Codes: F23D 2900/00018 Means for protecting parts of the burner, e.g. ceramic lining outside of the flame tube

Abstract

Submerged combustion burners having a burner body and a burner tip connected thereto. The burner body has an external conduit and first and second internal conduits substantially concentric therewith, forming first and second annuli for passing a cooling fluid therethrough. A burner tip body is connected to the burner body at ends of the external and second internal conduits. The burner tip includes a generally central flow passage for a combustible mixture, the flow passage defined by an inner wall of the burner tip. The burner tip further has an outer wall and a crown connecting the inner and outer walls. The inner and outer walls, and the crown are comprised of same or different materials having greater corrosion and/or fatigue resistance than at least the external burner conduit.

Claims

1. A fluid-cooled 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 having a longitudinal axis, the first internal conduit (12) 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) for passing a cooling fluid there between, and a second internal conduit (14) substantially concentric with, and positioned internal of the first internal conduit (12), the second internal conduit (14) comprising a first end, a second end, and a longitudinal bore having a longitudinal axis, and configured to form a second annulus (13) between the first and second internal conduits (12, 14), the burner body comprising fuel and oxidant inlet ports near the second ends of the conduits; and

a spin-formed or stamp formed, one-piece, integral, corrosion resistant and fatigue resistant burner tip (50) defined by a corrosion resistant and fatigue resistant inner wall (28), a corrosion resistant and fatigue resistant outer wall (30), and a corrosion resistant and fatigue resistant crown (32), the corrosion resistant and fatigue resistant outer wall (30) removably fixed to the first end of the external conduit (10) via an outer spin-formed or stamped double lap joint, and the corrosion resistant and fatigue resistant inner wall (28) removably fixed to the first end of the second internal conduit (14) via an inner spin-formed or stamped double lap joint, the spin-formed or stamp formed, one-piece, integral, corrosion resistant and fatigue resistant burner tip (50) comprising a generally central flow passage configured to pass a combustible mixture therethrough, the generally central flow passage defined by the a corrosion resistant and fatigue resistant inner wall (28), at least one of the corrosion and/or fatigue resistance being greater than material comprising the external conduit (10) under conditions experienced during submerged combustion melting of glass-forming materials, wherein the outer spin-formed or stamped double lap joint includes the first end of the external conduit curved outwardly, and the inner spin-formed or stamped double lap joint includes the first end of the second internal conduit curved outwardly.

2. The fluid-cooled combustion burner of claim 1 wherein the inner spin-formed or stamped double lap joint comprises a first spin-formed or stamped inner lap joint portion of the corrosion resistant and fatigue resistant inner wall (28) of the spin-formed or stamp formed, one-piece, integral, corrosion resistant and fatigue resistant burner tip (50), and a second spin-formed or stamped inner lap joint portion of the second internal conduit comprising material having corrosion and fatigue resistance less than that of the corrosion resistant and fatigue resistant material of the first spin-formed or stamped inner lap joint portion.

3. The fluid-cooled combustion burner of claim 2 wherein the outer spin-formed or stamped double lap joint comprises a first spin-formed or stamped outer lap joint portion of the corrosion resistant and fatigue resistant outer wall (30) of the spin-formed or stamp formed, one-piece, integral, corrosion resistant and fatigue resistant burner tip (50), and a second spin-formed or stamped outer lap joint portion of the external conduit comprising material having corrosion and fatigue resistance less than that of the corrosion resistant and fatigue resistant material of the first spin-formed or stamped outer lap joint portion.

4. The fluid-cooled combustion burner of claim 3 wherein:

the first and second internal conduits and the external conduit comprise the same or different base materials selected from the group consisting of carbon steel, stainless steel, titanium, nickel-based alloys, and combinations and alloys of two or more of these; and

the spin-formed or stamp formed, one-piece integral, corrosion resistant and fatigue resistant burner tip inner and outer walls and crown comprise the same or different materials selected from the group consisting of noble metals, alloys of two or more noble metals, alloys of one or more base metals with one or more noble metals, copper, copper alloys, and combinations and alloys of two or more of these.

5. The fluid-cooled combustion burner of claim 4 wherein the spin-formed or stamped inner double lap joint comprises a first weld, solder, or braze material, and the spin-formed or stamped outer double lap joint comprises a second weld, solder, or braze material, and wherein the first and second weld, solder, or braze materials may be the same or different.

6. The fluid-cooled combustion burner of claim 5 wherein the first and second weld, solder, or braze materials are independently selected from the group consisting of braze materials within the following table:

7. The fluid-cooled combustion burner of claim 3 wherein the first spin-formed or stamped inner lap joint portion, the second spin-formed or stamped inner lap joint portion, the first spin-formed or stamped outer lap joint portion, and the second spin-formed or stamped outer lap joint portion are formed by spin forming.

8. A submerged combustion melter comprising at least one fluid-cooled combustion burner of claim 7.

9. A submerged combustion melter comprising at least one fluid-cooled combustion burner of claim 3.

10. The fluid-cooled combustion burner of claim 1 comprising a third internal conduit (15) substantially concentric with and positioned internal of the second internal conduit (14).

11. A submerged combustion melter comprising at least one fluid-cooled combustion burner of claim 1.

12. A fluid-cooled 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 having a longitudinal axis, the first internal conduit (12) 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) for passing a cooling fluid there between, and a second internal conduit (14) substantially concentric with, and positioned internal of the first internal conduit (12), the second internal conduit (14) comprising a first end, a second end, and a longitudinal bore having a longitudinal axis, and configured to form a second annulus (13) between the first and second internal conduits (12, 14), and a third internal conduit (15) substantially concentric with and positioned internal of the second internal conduit (14), the burner body comprising fuel and oxidant inlet ports near the second ends of the conduits; and

a spin-formed, one-piece, integral;

corrosion resistant and fatigue resistant burner tip (50) defined by a corrosion resistant and fatigue resistant inner wall (28), a corrosion resistant and fatigue resistant outer wall (30), and a corrosion resistant and fatigue resistant crown (32), the corrosion resistant and fatigue resistant outer wall (30) removably fixed to the first end of the external conduit (10) via an outer spin-formed double lap joint, and the corrosion resistant and fatigue resistant inner wall (28) removably fixed to the first end of the second internal conduit (14) via an inner spin-formed double lap joint, the spin-formed, one-piece, integral, corrosion resistant and fatigue resistant burner tip (50) comprising a generally central flow passage configured to pass a combustible mixture therethrough, the generally central flow passage defined by the corrosion resistant and fatigue resistant inner wall (28), at least one of the corrosion and/or fatigue resistance being greater than material comprising the external conduit (10) under conditions experienced during submerged combustion melting of glass-forming materials, wherein the outer spin-formed double lap joint includes the first end of the external conduit curved outwardly, and the inner spin-formed double lap joint includes the first end of the second internal conduit curved outwardly.

13. The fluid-cooled combustion burner of claim 12 wherein

the first and second internal conduits and the external conduit comprise the same or different base materials selected from the group consisting of carbon steel, stainless steel, titanium, nickel-based alloys, and combinations and alloys of two or more of these;

and

the spin-formed, one-piece integral, corrosion resistant and fatigue resistant burner tip inner and outer walls and crown comprise the same or different materials selected from the group consisting of noble metals, alloys of two or more noble metals, alloys of one or more base metals with one or more noble metals, copper, copper alloys, and combinations and alloys of two or more of these.

14. The fluid-cooled combustion burner of claim 13 wherein the inner spin-formed double lap joint comprises a first weld, solder, or braze material, and the outer spin-formed double lap joint comprises a second weld, solder, or braze material, and wherein the first and second weld, solder, or braze materials may be the same or different.

15. The fluid-cooled combustion burner of claim 14 wherein the first and second weld, solder, or braze materials are independently selected from the group consisting of braze materials within the following table:

16. A submerged combustion melter comprising at least one fluid-cooled combustion burner of claim 12.