Methods and systems for making well-fined glass using submerged combustion

• US 9,227,865 B2
• Filed: 11/29/2012
• Issued: 01/05/2016
• Est. Priority Date: 11/29/2012
• Status: Active Grant

• Current Assignee: Johns Manville Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: Johns Manville Corporation (Berkshire Hathaway Incorporated)
• Inventors: Shock, Jeffrey M, Huber, Aaron Morgan
• Primary Examiner(s): Daniels, Matthew
• Assistant Examiner(s): Szewczyk, Cynthia
• Application Number:
  US13/689,318
• Publication Number:
  US 20140144185A1
• Time in Patent Office: 1,132 Days
• US Class Current: 1/1
• CPC Class Codes: C03B 2211/22 by direct combustion in the melt
• CPC Class Codes: C03B 2211/23 using oxygen, i.e. pure oxygen or oxygen-enriched air
• CPC Class Codes: C03B 5/04 in tank furnaces C03B5/02 takes precedence
• CPC Class Codes: C03B 5/193 using gas, e.g. bubblers
• CPC Class Codes: C03B 5/20 Bridges, shoes, throats, or other devices for withholding dirt, foam, or batch
• CPC Class Codes: C03B 5/205 Mechanical means for skimming or scraping the melt surface
• CPC Class Codes: C03B 5/225 Refining C03B5/18 takes precedence ; Refining agents C03C1/004
• 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 5/43 Use of materials for furnace walls, e.g. fire-bricks
• CPC Class Codes: Y02P 40/50 Glass production, e.g. reusing waste heat during processing or shaping

Abstract

Methods and systems produce a molten mass of foamed glass in a submerged combustion melter (SCM). Routing foamed glass to a fining chamber defined by a flow channel fluidly connected to and downstream of the SCM. The flow channel floor and sidewalls have sufficient glass-contact refractory to accommodate expansion of the foamed glass as fining occurs during transit through the fining chamber. The foamed glass is separated into an upper glass foam phase and a lower molten glass phase as the foamed glass flows toward an end of the flow channel distal from the SCM. The molten glass is then routed through a transition section fluidly connected to the distal end of the flow channel. The transition section inlet end construction has at least one molten glass inlet aperture, such that the inlet aperture(s) are positioned lower than the phase boundary between the upper and lower phases.

Claims

1. A system comprising:

a submerged combustion melter (SCM) configured to form a turbulent molten mass of foamed glass by melting glass-forming materials therein, the SCM comprising a roof, a floor, a sidewall structure connecting the roof and floor, and a foamed glass outlet in the floor and/or the sidewall structure;

a first flow channel defining a fining chamber fluidly connected to and downstream of the SCM, the first flow channel comprising at least a floor and a sidewall structure, the first flow channel comprising glass-contact refractory at least lining the floor and at least a portion of the first flow channel sidewall structure to a height sufficient to accommodate expansion of the molten mass of foamed glass as fining occurs during transit of the molten mass of foamed glass through the fining chamber, the fining separating the molten mass of foamed glass into an upper phase consisting essentially of glass foam and a lower phase consisting essentially of molten glass as the molten mass of foamed glass flows toward an end of the first flow channel distal from the SCM;

a transition section defining a passage fluidly connected to the distal end of the first flow channel, the transition section comprising a floor and a cover, the floor and cover connected by a sidewall structure, and comprising an inlet end structure and an outlet end structure, the inlet end structure comprising at least one molten glass inlet aperture and the outlet end structure comprising at least one molten glass outlet aperture, wherein all of the inlet apertures are positioned lower than a phase boundary between the upper and lower phases in the first flow channel;

wherein the floor of the transition section comprises at least one controllable aperture for flowing at least some of the molten glass by gravity therethrough upon a planned or unplanned condition.

2. The system of claim 1 wherein the passage comprises a source of heat and/or a heat sink for adjusting temperature of the molten glass as it passes through the passage.

3. The system of claim 1 comprising a second flow channel having at least a floor and a sidewall structure, the second flow channel defining a temperature homogenizing chamber, the second flow channel fluidly connected to the outlet end structure of the transition section for forming a temperature homogenized, well-fined molten glass by routing the phase consisting essentially of molten glass through the at least one outlet aperture of the outlet end structure of the transition section and into the temperature homogenizing chamber.

4. The system of claim 3 comprising one or more glass forming stations fluidly connected to a distal end of the second flow channel.

5. The system of claim 4 wherein the glass forming stations are selected from the group consisting of fiber forming spinnerets, fiberization stations, and non-glass fiber product forming stations.

6. The system of claim 4 wherein the outlet end structure of the transition section is configured to allow the molten glass to well up into an inlet end of the second flow channel.

7. The system of claim 3 wherein the first flow channel comprises a roof having a height h₁ above the cover of the transition section, and the second flow channel has a roof having a height h₂ above the cover of the transition section, wherein h₁>

h₂.

8. The system of claim 1 wherein 100 percent of the inlet aperture is lower than the floor of the first flow channel.

9. The system of claim 1 comprising at least one component for heating the molten glass in the transition section to maintain the molten glass in the molten state.

10. The system of claim 1 comprising at least one component for cooling the molten glass as it passes through the transition section to a temperature just above a desired glass product forming temperature.

11. The system of claim 1 wherein the transition section inlet end structure comprises a bottom angled at an angle “

α

”

to horizontal, and the outlet end structure includes a bottom portion angled at an angle “

β

”

to horizontal, wherein “

α

” and

“

β

”

are the same or different.

12. A system comprising:

a submerged combustion melter (SCM) configured to form a turbulent molten mass of foamed glass by melting glass-forming materials therein, the SCM comprising a roof, a floor, a sidewall structure connecting the roof and floor, and a foamed glass outlet in the floor and/or the sidewall structure;

a first flow channel defining a fining chamber fluidly connected to and downstream of the SCM, the first flow channel comprising at least a floor, a sidewall structure, and a roof that slants upward in the flow direction at an angle “

γ

”

to horizontal, the first flow channel comprising glass-contact refractory at least lining the floor and at least a portion of the first flow channel sidewall structure to a height sufficient to accommodate expansion of the molten mass of foamed glass as fining occurs during transit of the molten mass of foamed glass through the fining chamber, the fining separating the molten mass of foamed glass into an upper phase consisting essentially of glass foam and a lower phase consisting essentially of molten glass as the molten mass of foamed glass flows toward an end of the first flow channel distal from the SCM; and

a transition section defining a passage fluidly connected to the distal end of the first flow channel, the transition section comprising a floor and a cover, the floor and cover connected by a sidewall structure, and comprising an inlet end structure and an outlet end structure, the inlet end structure comprising at least one molten glass inlet aperture and the outlet end structure comprising at least one molten glass outlet aperture, wherein all of the inlet apertures are positioned lower than a phase boundary between the upper and lower phases in the first flow channel.

13. A system comprising:

a submerged combustion melter (SCM) configured to form a turbulent molten mass of foamed glass by melting glass-forming materials therein, the SCM comprising a roof, a floor, a sidewall structure connecting the roof and floor, and a foamed glass outlet in the floor and/or the sidewall structure;

a first flow channel defining a fining chamber fluidly connected to and downstream of the SCM, the first flow channel comprising at least a floor and a sidewall structure, the first flow channel comprising glass-contact refractory at least lining the floor and at least a portion of the first flow channel sidewall structure to a height sufficient to accommodate expansion of the molten mass of foamed glass as fining occurs during transit of the molten mass of foamed glass through the fining chamber, the fining separating the molten mass of foamed glass into an upper phase consisting essentially of glass foam and a lower phase consisting essentially of molten glass as the molten mass of foamed glass flows toward an end of the first flow channel distal from the SCM; and

a transition section defining a passage fluidly connected to the distal end of the first flow channel, the transition section comprising a floor and a cover, the floor and cover connected by a sidewall structure, and comprising an inlet end structure and an outlet end structure, the inlet end structure comprising at least one molten glass inlet aperture and the outlet end structure comprising at least one molten glass outlet aperture, wherein all of the inlet apertures are positioned lower than a phase boundary between the upper and lower phases in the first flow channel wherein the transition section cover slants upward in the flow direction at an angle “

θ

”

to horizontal.

14. A system comprising:

a submerged combustion melter (SCM) configured to form a turbulent molten mass of foamed glass by melting glass-forming materials therein, the SCM comprising a roof, a floor, a sidewall structure connecting the roof and floor, and a foamed glass outlet in the floor and/or the sidewall structure;

a first flow channel defining a fining chamber fluidly connected to and downstream of the SCM, the first flow channel comprising at least a floor and a sidewall structure, the first flow channel comprising glass-contact refractory at least lining the floor and at least a portion of the first flow channel sidewall structure to a height sufficient to accommodate expansion of the molten mass of foamed glass as fining occurs during transit of the molten mass of foamed glass through the fining chamber, the fining separating the molten mass of foamed glass into an upper phase consisting essentially of glass foam and a lower phase consisting essentially of molten glass as the molten mass of foamed glass flows toward an end of the first flow channel distal from the SCM;

a transition section defining a passage fluidly connected to the distal end of the first flow channel, the transition section comprising a floor and a cover, the floor and cover connected by a sidewall structure, and comprising an inlet end wall and an outlet end wall, the inlet end wall comprising at least one molten glass inlet aperture and the outlet end wall comprising at least one molten glass outlet aperture, wherein 100 percent of the inlet aperture is lower than the floor of the first flow channel; and

a second flow channel fluidly connected to the outlet end wall of the transition section and defining a temperature homogenizing chamber for forming a temperature homogenized, well-fined molten glass using the phase consisting essentially of molten glass;

wherein the floor of the transition section comprises at least one controllable aperture for flowing at least some of the molten glass by gravity therethrough upon a planned or unplanned condition.

15. The system of claim 14 wherein the passage comprises a source of heat and/or a heat sink for adjusting temperature of the molten glass as it passes through the passage.

16. The system of claim 14 comprising one or more glass forming stations fluidly connected to a distal end of the second flow channel.

17. The system of claim 16 comprising wherein the glass forming stations are selected from the group consisting of fiber forming bushings, fiberization stations, and non-glass fiber product forming stations.

18. The system of claim 14 wherein the outlet end wall of the transition section is configured to allow the molten glass to well up into an inlet end of the second flow channel.

19. The system of claim 14 comprising at least one component for heating the molten glass in the transition section to maintain the molten glass in the molten state.

20. The system of claim 14 comprising at least one component for cooling the molten glass as it passes through the transition section to a temperature just above a desired glass product forming temperature.

21. The system of claim 14 wherein the first flow channel comprises a roof having a height h₁ above the cover of the transition section, and the second flow channel has a roof having a height h₂ above the cover of the transition section, wherein h₁>

h₂.

22. The system of claim 14 wherein the transition section inlet end structure comprises a bottom angled at an angle “

α

”

to horizontal, and the outlet end structure includes a bottom portion angled at an angle “

β

”

to horizontal, wherein “

α

” and

“

β

”

are the same or different.

23. A system comprising:

a submerged combustion melter (SCM) configured to form a turbulent molten mass of foamed glass by melting glass-forming materials therein, the SCM comprising a roof, a floor, a sidewall structure connecting the roof and floor, and a foamed glass outlet in the floor and/or the sidewall structure;

a first flow channel defining a fining chamber fluidly connected to and downstream of the SCM, the first flow channel comprising at least a floor and a sidewall structure, the first flow channel comprising glass-contact refractory at least lining the floor and at least a portion of the first flow channel sidewall structure to a height sufficient to accommodate expansion of the molten mass of foamed glass as fining occurs during transit of the molten mass of foamed glass through the fining chamber, the fining separating the molten mass of foamed glass into an upper phase consisting essentially of glass foam and a lower phase consisting essentially of molten glass as the molten mass of foamed glass flows toward an end of the first flow channel distal from the SCM;

a transition section defining a passage fluidly connected to the distal end of the first flow channel, the transition section comprising a floor and a cover, the floor and cover connected by a sidewall structure, and comprising an inlet end wall and an outlet end wall, the inlet end wall comprising at least one molten glass inlet aperture and the outlet end wall comprising at least one molten glass outlet aperture, wherein 100 percent of the inlet aperture is lower than the floor of the first flow channel; and

a second flow channel fluidly connected to the outlet end wall of the transition section and defining a temperature homogenizing chamber for forming a temperature homogenized, well-fined molten glass using the phase consisting essentially of molten glass wherein the first flow channel comprises a roof that slants upward in the flow direction at an angle “

γ

”

to horizontal.

24. A system comprising:

a submerged combustion melter (SCM) configured to form a turbulent molten mass of foamed glass by melting glass-forming materials therein, the SCM comprising a roof, a floor, a sidewall structure connecting the roof and floor, and a foamed glass outlet in the floor and/or the sidewall structure;

a first flow channel defining a fining chamber fluidly connected to and downstream of the SCM, the first flow channel comprising at least a floor and a sidewall structure, the first flow channel comprising glass-contact refractory at least lining the floor and at least a portion of the first flow channel sidewall structure to a height sufficient to accommodate expansion of the molten mass of foamed glass as fining occurs during transit of the molten mass of foamed glass through the fining chamber, the fining separating the molten mass of foamed glass into an upper phase consisting essentially of glass foam and a lower phase consisting essentially of molten glass as the molten mass of foamed glass flows toward an end of the first flow channel distal from the SCM;

a transition section defining a passage fluidly connected to the distal end of the first flow channel, the transition section comprising a floor and a cover, the floor and cover connected by a sidewall structure, and comprising an inlet end wall and an outlet end wall, the inlet end wall comprising at least one molten glass inlet aperture and the outlet end wall comprising at least one molten glass outlet aperture, wherein 100 percent of the inlet aperture is lower than the floor of the first flow channel; and

a second flow channel fluidly connected to the outlet end wall of the transition section and defining a temperature homogenizing chamber for forming a temperature homogenized, well-fined molten glass using the phase consisting essentially of molten glass wherein the transition section cover slants upward in the flow direction at an angle “

θ

”

to horizontal.