Systems and methods for glass manufacturing

• US 9,573,831 B2
• Filed: 01/27/2015
• Issued: 02/21/2017
• Est. Priority Date: 06/17/2010
• Status: Active Grant

• Current Assignee: Johns Manville Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: Johns Manville Corporation (Berkshire Hathaway Incorporated)
• Inventors: Charbonneau, Mark William, Huber, Aaron Morgan, Shock, Jeffrey M, Borders, Harley Allen
• Primary Examiner(s): Lazorcik, Jason L
• Assistant Examiner(s): Szewczyk, Cynthia
• Application Number:
  US14/606,875
• Publication Number:
  US 20150143850A1
• Time in Patent Office: 756 Days
• US Class Current: 1/1
• CPC Class Codes: C03B 5/20 Bridges, shoes, throats, or other devices for withholding dirt, foam, or batch
• CPC Class Codes: C03B 5/202 Devices for blowing onto the melt surface, e.g. high momentum burners
• CPC Class Codes: C03B 5/2257 by thin-layer fining
• CPC Class Codes: C03B 5/235 Heating the glass C03B5/02, C03B5/18, C03B5/225 take precedence
• 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: C03B 7/06 Means for thermal conditioning or controlling the temperature of the glass
• CPC Class Codes: F23C 5/08 Disposition of burners
• 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 14/32 using a mixture of gaseous fuel and pure oxygen or oxygen-enriched air F23D14/38 takes precedence
• CPC Class Codes: F27B 14/14 Arrangements of heating devices
• CPC Class Codes: Y02E 20/34 Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
• CPC Class Codes: Y02P 40/50 Glass production, e.g. reusing waste heat during processing or shaping

Abstract

Submerged combustion systems and methods of use to produce glass. One system includes a submerged combustion melter having a roof, a floor, a wall structure connecting the roof and floor, and an outlet, the melter producing an initial foamy molten glass. One or more non-submerged auxiliary burners are positioned in the roof and/or wall structure and configured to deliver combustion products to impact at least a portion of the bubbles with sufficient force and/or heat to burst at least some of the bubbles and form a reduced foam molten glass.

Claims

1. A method comprising:

melting glass-forming materials in a submerged combustion melter comprising a floor, a roof, and a wall structure connecting the floor and roof, the wall structure comprising a feed end wall, a discharge end wall opposite the feed end wall, and first and second side walls connecting the feed end wall and the discharge end wall, the melter comprising one or more submerged combustion burners positioned in the floor to discharge combustion products vertically upward, and a molten glass outlet positioned in the discharged end wall;

producing an initial foamy molten glass having a density and comprising bubbles, at least some of the bubbles forming a bubble layer on top of the foamy molten glass; and

routing combustion products from one or more substantially vertical non-submerged auxiliary burners positioned in the roof to discharge combustion products substantially vertically downward, and two or more wall-mounted non-submerged auxiliary burners positioned in the first side wall to discharge combustion products substantially horizontally and substantially perpendicularly toward the second side wall, the one or more substantially vertical roof-mounted non-submerged burners positioned offset horizontally between the second side wall and a vertical line through a centerline of the one or more submerged combustion burners that is positioned furthest from the first side wall, to impact at least a portion of the bubbles in the bubble layer with sufficient force and/or heat to burst at least some of the bubbles and form a reduced foam molten glass.

2. The method of claim 1 comprising adjusting one or more of the non-submerged auxiliary burners with respect to direction of flow of their combustion products.

3. The method of claim 1 comprising flowing at least a portion of the reduced foam molten glass to a downstream component fluidly connected to the melter, the downstream component comprising a flow channel, a downstream component roof, and a downstream component wall structure connecting the downstream component wall structure and downstream component roof.

4. The method of claim 3 comprising routing combustion products from at least one non-submerged downstream component auxiliary burners positioned in the downstream component roof and/or downstream component wall structure to impact at least a portion of bubbles remaining in the reduced foam molten glass.

5. The method of claim 4 comprising adjusting one or more of the non-submerged downstream component auxiliary burners with respect to direction of flow of their combustion products.

6. The method of claim 1 comprising adjusting fuel velocity of the auxiliary burners to a value ranging from about 150 ft./second to about 1000 ft./second (about 46 meters/second to about 305 meters/second) and adjusting oxidant velocity to a value ranging from about 150 ft./second to about 1000 ft./second (about 46 meters/second to about 305 meters/second), wherein the fuel and oxidant velocities may be the same or different.

7. A method comprising:

melting glass-forming materials in a submerged combustion melter comprising a floor, a roof, and a wall structure connecting the floor and roof, the wall structure comprising a feed end wall, a discharge end wall opposite the feed end wall, and first and second side walls connecting the feed end wall and the discharge end wall, the melter comprising one or more submerged combustion burners positioned in the floor to discharge combustion products vertically upward, and a molten glass outlet positioned in the discharged end wall;

producing an initial foamy molten glass having a density and comprising bubbles, at least some of the bubbles forming a bubble layer on top of the foamy molten glass; and

routing at least a portion of the foamy molten glass and bubble layer into a downstream component fluidly connected to the melter, the downstream component comprising a flow channel, a downstream component roof, and a downstream component wall structure connecting the downstream component flow channel and downstream component roof; and

routing combustion products from at least one downstream component non-submerged auxiliary burners positioned in the downstream component roof but not in the and/or downstream component wall structure to impact at least a portion of bubbles in the bubble layer on the foamy molten glass with sufficient force and/or heat to burst at least some of the bubbles.

8. The method of claim 7 comprising adjusting one or more of the downstream component non-submerged auxiliary burners with respect to direction of flow of their combustion products.

9. The method of claim 8 comprising adjusting fuel velocity of the downstream component non-submerged auxiliary burners to a value ranging from about 150 ft./second to about 1000 ft./second (about 46 meters/second to about 305 meters/second) and adjusting oxidant velocity to a value ranging from about 150 ft./second to about 1000 ft./second (about 46 meters/second to about 305 meters/second), wherein the fuel and oxidant velocities may be the same or different.

10. A method comprising:

melting glass-forming materials in a submerged combustion melter comprising a floor, a roof, and a wall structure connecting the floor and roof, the wall structure comprising a feed end wall, a discharge end wall opposite the feed end wall, and first and second side walls connecting the feed end wall and the discharge end wall, the melter comprising one or more submerged combustion burners positioned in the floor to discharge combustion products vertically upward, and a molten glass outlet positioned in the discharged end wall;

producing an initial foamy molten glass having a density and comprising bubbles, at least some of the bubbles forming a bubble layer on top of the foamy molten glass;

routing combustion products from one or more substantially vertical non-submerged auxiliary burners positioned in the roof to discharge combustion products substantially vertically downward, and two or more wall-mounted non-submerged auxiliary burners positioned in the first side wall to discharge combustion products substantially horizontally and substantially perpendicularly toward the second side wall, the one or more substantially vertical roof-mounted non-submerged burners positioned offset horizontally between the second side wall and a vertical line through a centerline of the one or more submerged combustion burners that is positioned furthest from the first side wall, to impact at least a portion of the bubbles in the bubble layer with sufficient force and/or heat to burst at least some of the bubbles and form a reduced foam molten glass;

routing at least a portion of the reduced foam molten glass to a downstream component fluidly connected to the melter, the downstream component comprising a flow channel, a downstream component roof, and a downstream component wall structure connecting the downstream component flow channel and downstream component roof; and

routing combustion products from at least one downstream component non-submerged auxiliary burners positioned in the downstream component roof but not in the downstream component wall structure to impact at least a portion of bubbles in the bubble layer on the foamy molten glass with sufficient force and/or heat to burst at least some of the bubbles.

11. The method of claim 10 comprising adjusting one or more of the non-submerged auxiliary burners in the melter roof and/or melter wall structure with respect to direction of flow of their combustion products.

12. The method of claim 10 comprising adjusting one or more of the downstream component non-submerged auxiliary burners with respect to direction of flow of their combustion products.

13. The method of claim 10 comprising adjusting the melter auxiliary burners to have a fuel velocity ranging from about 150 ft./second to about 1000 ft./second (about 46 meters/second to about 305 meters/second) and an oxidant velocity ranging from about 150 ft./second to about 1000 ft./second (about 46 meters/second to about 305 meters/second), wherein the fuel and oxidant velocities may be the same or different.

14. The method of claim 10 comprising adjusting the downstream component auxiliary burners to have a fuel velocity ranging from about 150 ft./second to about 1000 ft./second (about 46 meters/second to about 305 meters/second) and an oxidant velocity ranging from about 150 ft./second to about 1000 ft./second (about 46 meters/second to about 305 meters/second), wherein the fuel and oxidant velocities may be the same or different.