CN116621423A - Glass melting furnace, glass product manufacturing apparatus, and glass product manufacturing method - Google Patents
Glass melting furnace, glass product manufacturing apparatus, and glass product manufacturing method Download PDFInfo
- Publication number
- CN116621423A CN116621423A CN202310079702.2A CN202310079702A CN116621423A CN 116621423 A CN116621423 A CN 116621423A CN 202310079702 A CN202310079702 A CN 202310079702A CN 116621423 A CN116621423 A CN 116621423A
- Authority
- CN
- China
- Prior art keywords
- melting furnace
- glass
- exhaust port
- wall
- burner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002844 melting Methods 0.000 title claims abstract description 214
- 230000008018 melting Effects 0.000 title claims abstract description 214
- 239000011521 glass Substances 0.000 title claims abstract description 183
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 65
- 238000002485 combustion reaction Methods 0.000 claims abstract description 46
- 239000006060 molten glass Substances 0.000 claims abstract description 43
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 41
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000001301 oxygen Substances 0.000 claims abstract description 33
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 33
- 238000005192 partition Methods 0.000 claims description 62
- 238000010790 dilution Methods 0.000 claims description 20
- 239000012895 dilution Substances 0.000 claims description 20
- 239000000446 fuel Substances 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 description 19
- 239000000047 product Substances 0.000 description 17
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
- C03B5/2353—Heating the glass by combustion with pure oxygen or oxygen-enriched air, e.g. using oxy-fuel burners or oxygen lances
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Glass Melting And Manufacturing (AREA)
- Glass Compositions (AREA)
Abstract
The present invention relates to a glass melting furnace, a glass product manufacturing apparatus, and a glass product manufacturing method. The present invention relates to a glass melting furnace capable of reducing the amount of water contained in molten glass and improving thermal efficiency. The glass melting furnace has an upstream wall, a downstream wall, a first side wall, and a second side wall, wherein the first side wall is provided with a first burner group, the second side wall is provided with a second burner group, 40% -100% of the total combustion heat per 1 hour supplied by the first burner group and the second burner group is supplied by an oxygen combustion burner, the first side wall and/or the second side wall has an exhaust port, the exhaust port closest to the downstream wall is referred to as a specific exhaust port, the first side wall or the second side wall has a supply port for supplying a diluent gas, and when the distance from the upstream wall to the downstream wall is L, and the direction of L is referred to as an extending direction, the supply port is arranged at a position of 0.3L or more from the specific exhaust port along the extending direction and 0.3L or less from the downstream wall along the extending direction.
Description
Technical Field
The present invention relates to a glass melting furnace, a glass product manufacturing apparatus, and a glass product manufacturing method.
Background
A glass manufacturing apparatus for manufacturing glass articles has a glass melting furnace. The glass raw material is melted in the glass melting furnace, thereby forming molten glass.
In general, a glass melting furnace has an upstream wall and a downstream wall opposite to each other, two side walls opposite to each other, and an upper surface and a bottom surface, thereby dividing a lower melting portion and an upper ceiling portion.
The upstream wall is provided with an inlet for glass raw material, and the downstream wall is provided with a discharge port for molten glass, a passage for conveying the molten glass to another chamber, and the like. In addition, a plurality of burners are provided on the ceiling portion side of the side wall in order to heat and melt the glass in the melting portion.
The burners are roughly classified into air-assisted burners and oxygen-assisted burners. In the air-assisted burner, air is used as a gas mixed with a fuel such as natural gas and/or heavy oil, and in the oxygen-assisted burner, oxygen is used as a gas mixed with a fuel.
Prior art literature
Patent literature
Patent document 1: international publication No. 2011/136086
Disclosure of Invention
Problems to be solved by the invention
Compared with an air combustion-supporting burner, the oxygen combustion-supporting burner has good thermal efficiency, can reduce the amount of gas used, and can therefore suppress CO 2 Is a discharge amount of (2). In addition, the oxygen combustion-supporting burner can also inhibit NO x And the discharge amount of nitrogen oxides.
However, when all burners included in the glass melting furnace are constituted by oxygen-assisted burners, the concentration of moisture contained in the combustion exhaust gas tends to be high, and as a result, the amount of moisture contained in the molten glass also increases.
In particular, platinum members having good protection against molten glass are used in some glass manufacturing equipment. When moisture in the molten glass comes into contact with such platinum members, the moisture is decomposed, producing hydrogen gas and oxygen gas. Among them, hydrogen gas can permeate through the platinum member, and thus can rapidly escape to the outside of the system. However, oxygen remains directly in the molten glass, resulting in bubbles remaining in the manufactured glass article.
In order to cope with such a problem in quality of glass products caused by bubbles, patent document 1 proposes to dispose an oxygen combustion-supporting burner and an air combustion-supporting burner at predetermined positions to reduce the amount of water contained in molten glass.
However, in the structure of the glass melting furnace described in patent document 1, there is a problem that the efficiency of heat supplied into the glass melting furnace is poor and the amount of fuel used in the burner is significantly increased.
The present invention has been made in view of such a background, and an object of the present invention is to provide a glass melting furnace capable of remarkably reducing the amount of moisture contained in molten glass and remarkably improving the thermal efficiency. In addition, an object of the present invention is to provide an apparatus for manufacturing a glass product having such a glass melting furnace. The present invention also provides a method for producing a glass product using such a glass melting furnace.
Means for solving the problems
In the present invention, there is provided a glass melting furnace having an upstream wall and a downstream wall opposite to each other, and a first side wall and a second side wall opposite to each other,
a first burner group comprising oxygen-fired burners is arranged on the first side wall, a second burner group comprising oxygen-fired burners is arranged on the second side wall,
40 to 100% of the total combustion heat per 1 hour supplied by the first burner group and the second burner group is supplied by the oxygen-assisted burner, 0 to 60% of the total combustion heat is supplied by the air-assisted burner,
The first side wall and/or the second side wall has an exhaust port for exhausting combustion exhaust gas to the outside of the system, the exhaust port closest to the downstream wall is referred to as a specific exhaust port,
the first side wall or the second side wall has a supply port for supplying a dilution gas into the glass melting furnace,
when the distance from the upstream wall to the downstream wall is L and the direction of L is referred to as the extending direction,
the supply port is disposed at a position of 0.3L or more from the specific exhaust port in the extending direction and 0.3L or less from the downstream wall in the extending direction.
In addition, in the present invention, there is provided a manufacturing apparatus of a glass article, wherein the manufacturing apparatus has:
a glass melting furnace,
Forming device
A conveying device connecting the glass melting furnace and the forming device,
the glass melting furnace is a glass melting furnace with the characteristics.
In addition, the present invention provides a method for producing a glass product, wherein the method comprises:
a melting step,
Conveying process
In the forming process, the forming step is carried out,
a glass melting furnace having the above-described characteristics is used in the melting process.
Effects of the invention
In the present invention, a glass melting furnace can be provided that can significantly reduce the amount of moisture contained in molten glass and can significantly improve the thermal efficiency. In addition, in the present invention, a glass product manufacturing apparatus having such a glass melting furnace can be provided. In addition, the present invention can provide a method for producing a glass product using such a glass melting furnace.
Drawings
Fig. 1 is a schematic plan view of a glass melting furnace according to an embodiment of the present invention.
Fig. 2 is a schematic side sectional view of the glass melting furnace shown in fig. 1.
FIG. 3 is a schematic top view of another glass melting furnace according to one embodiment of the present invention.
Fig. 4 is a schematic side sectional view of the glass melting furnace shown in fig. 3.
Fig. 5 is a schematic top view of another glass melting furnace according to an embodiment of the present invention.
Fig. 6 is a schematic side cross-sectional view of the glass melting furnace shown in fig. 5.
Fig. 7 is a flowchart schematically showing a flow of a method for manufacturing a glass product according to an embodiment of the present invention.
Description of the reference numerals
1A-7A burner
1B-7B burner
100. Glass melting furnace (first melting furnace)
110. Upstream wall
112. Input port
120. Downstream wall
122. Extraction port
130A first sidewall
130B second side wall
135A first supply port
135B second supply port
140A first burner group
140B second burner group
150A first exhaust port
150B second exhaust port
160. Partition wall
192. Upper surface of
194. Bottom surface
200. Glass melting furnace (second melting furnace)
210. Upstream wall
212. Input port
220. Downstream wall
222. Extraction port
230A first side wall
230B second side wall
235A first supply port
235B second supply port
240A first burner group
240B second burner group
250A first exhaust port
250B second exhaust port
260. Partition wall
292. Upper surface of
294. Bottom surface
300. Glass melting furnace (third melting furnace)
310. Upstream wall
312. Input port
320. Downstream wall
322. Extraction port
330A first side wall
330B second side wall
335A first supply port
335B second supply port
340A first burner group
340B second burner group
350A first exhaust port
350B second exhaust port
380. Chamber chamber
382. Narrow passageway
392. Upper surface of
394. Bottom surface
BC melting part
MA glass raw material
MG-molten glass
PA first partition
PB second partition
UC ceiling part
Detailed Description
An embodiment of the present invention will be described below.
As described above, the glass melting furnace described in patent document 1 has a problem that the heat efficiency to be supplied to the glass melting furnace is poor and the amount of fuel to be used is significantly increased.
In contrast, in one embodiment of the present invention, there is provided a glass melting furnace having upstream and downstream walls opposite to each other, and first and second side walls opposite to each other,
a first burner group including oxygen-fired burners is disposed on the first side wall, a second burner group including oxygen-fired burners is disposed on the second side wall,
40 to 100% of the total combustion heat per 1 hour supplied from the first burner group and the second burner group is supplied from the oxygen combustion-supporting burner, 0 to 60% of the total combustion heat is supplied from the air combustion-supporting burner,
The first side wall and/or the second side wall has an exhaust port for exhausting the combustion exhaust gas to the outside of the system, and the exhaust port closest to the downstream wall is referred to as a specific exhaust port,
the first side wall or the second side wall has a supply port for supplying a dilution gas into the glass melting furnace,
when the distance from the upstream wall to the downstream wall is L and the direction of L is referred to as the extending direction,
the supply port is disposed at a position of 0.3L or more from the specific exhaust port in the extending direction and 0.3L or less from the downstream wall in the extending direction.
The glass melting furnace according to one embodiment of the present application has an exhaust port for exhausting combustion exhaust gas to the outside of the system on the first side wall and/or the second side wall. The number of the exhaust ports provided on the first side wall and the second side wall is not particularly limited, and a plurality of exhaust ports may be present.
Here, among the exhaust ports provided on the first side wall and the second side wall, the exhaust port located at the position closest to the downstream wall is particularly referred to as "specific exhaust port" in the present application.
For example, in the case where the exhaust port exists only on the first side wall, the exhaust port located at the position closest to the downstream wall is referred to as a "specific exhaust port". Similarly, in the case where the exhaust port is present only on the second side wall, the exhaust port located at the position closest to the downstream wall is referred to as a "specific exhaust port". Further, in the case where one or more exhaust ports are present on the first side wall and the second side wall, respectively, the exhaust port located at the position closest to the downstream wall is referred to as a "specific exhaust port".
In the glass melting furnace according to the embodiment of the present invention, the distance between the upstream wall and the downstream wall is denoted by L, and the direction of L is also referred to as "extending direction".
In the glass melting furnace according to the embodiment of the present invention, 40% to 100% of the total combustion heat per 1 hour supplied from the first burner group and the second burner group is supplied from the oxygen combustion-supporting burner. In other words, only 0 to 60% of the total combustion heat per 1 hour is supplied by the air-assisted burner.
Oxygen-fired burners typically have a higher combustion efficiency than air-fired burners. Therefore, by supplying 40% to 100% of the total combustion heat per 1 hour by the oxygen combustion-supporting burner, the combustion efficiency can be significantly improved as compared with the conventional one, and as a result, the heat efficiency in the glass melting furnace can be improved.
In addition, the glass melting furnace according to one embodiment of the present invention has a supply port for supplying a dilution gas into the glass melting furnace on the first side wall or the second side wall. In this case, the dilution gas can be supplied from the supply port into the glass melting furnace, and the concentration of the moisture contained in the combustion exhaust gas can be significantly reduced by the dilution gas.
The supply port is disposed at a distance of 0.3L or more from the specific exhaust port along the "extending direction" defined as described above. By providing the supply port at a position sufficiently distant from the "specific exhaust port" in this way, the moving distance of the dilution gas in the glass melting furnace can be sufficiently obtained.
In one embodiment of the present invention, the supply port is disposed at a position 0.3L or less from the downstream wall along the "extending direction". By disposing the supply port near the "downstream end" of the glass melting furnace in this manner, the diluent gas can be sufficiently dispersed in the glass melting furnace.
Thus, in the glass melting furnace according to the embodiment of the present invention, the concentration of moisture contained in the combustion exhaust gas can be significantly reduced, and as a result, the amount of moisture contained in the molten glass can be significantly reduced.
It is to be noted that, based on the same concept, it is conceivable to dispose the supply port at a position 0.3L or less from the upstream wall along the "extending direction".
However, in general, the "upstream end" of the glass melting furnace is the side to which the glass raw material is supplied, that is, the inlet side, and is a region in which the temperature in the glass melting furnace is relatively low. Therefore, in the case where a supply port is provided on such an inlet side and a dilution gas is supplied from the supply port, the temperature of the inlet side of the glass melting furnace is caused to be further lowered. In addition, as a result, further heat addition is required at the inlet side, resulting in further reduction in overall thermal efficiency.
Therefore, in the glass melting furnace according to the embodiment of the present application, the supply port of the dilution gas is not disposed on the upstream wall but disposed in the vicinity of the downstream wall.
According to the effects described above, in the glass melting furnace according to one embodiment of the present application, the heat efficiency can be significantly improved, and the amount of moisture contained in the molten glass can be significantly reduced.
Here, in the present application, the distance L from the upstream wall to the downstream wall is defined as the distance from the most downstream position of the upstream wall to the most upstream position of the downstream wall.
The distance from the specific exhaust port to the supply port is defined as the distance from the downstream-most portion of the specific exhaust port to the upstream-most portion of the supply port along the "extending direction".
The distance from the supply port to the downstream wall is defined as the distance from the most downstream portion of the supply port to the most upstream position of the downstream wall along the "extending direction".
(glass melting furnace according to one embodiment of the present application)
Hereinafter, a glass melting furnace according to an embodiment of the present application will be described in more detail with reference to the accompanying drawings.
Fig. 1 is a schematic plan view of a glass melting furnace according to an embodiment of the present application. Fig. 2 is a schematic side sectional view of a glass melting furnace according to an embodiment of the present application.
As shown in fig. 1 and 2, a glass melting furnace (hereinafter referred to as a "first melting furnace" 100) of one embodiment of the present invention has an upstream wall 110 and a downstream wall 120 opposite to each other, and a first side wall 130A and a second side wall 130B opposite to each other.
An inlet 112 for glass raw material MA is provided in the upstream wall 110, and an outlet 122 for molten glass MG is provided in the downstream wall 120.
As described above, the distance between the upstream wall 110 and the downstream wall 120 is denoted by L, and the direction of the distance L is the "extending direction".
The first melting furnace 100 also has an upper surface 192 and a bottom surface 194. Accordingly, the upper ceiling UC is divided into the lower melting portion BC by the upper wall 110, the lower wall 120, the first side wall 130A, the second side wall 130B, the upper surface 192, and the bottom surface 194.
The melting portion BC accommodates the molten glass MG. A plurality of burners (described in detail below), a first exhaust port 150A, and a second exhaust port 150B are disposed on the ceiling UC.
A first burner group 140A including a plurality of burners 1A to 7A is disposed on the ceiling UC side of the first sidewall 130A. Similarly, a second burner group 140B including a plurality of burners 1B to 7B is disposed on the ceiling UC side of the second side wall 130B.
The burners 1A to 7A of the first burner group 140A and the burners 1B to 7B of the second burner group 140B have the function of injecting flames generated when the mixed gas is burned into the first melting furnace 100, respectively, to thereby melt the glass raw material MA and heat the molten glass MG.
In the first burner group 140A, the burner 1A is the most upstream-side burner, and thereafter, the reference numerals of the burners become larger in order as going toward the downstream side. Therefore, in the case where the first burner group 140A is configured of n (n is an integer of 2 or more) burners, the most downstream burner is denoted by a symbol nA. The same is true for each burner of the second burner group 140B.
The first exhaust port 150A is provided on the ceiling UC side of the first side wall 130A, and the second exhaust port 150B is provided on the ceiling UC side of the second side wall 130B. Each of the first exhaust port 150A and the second exhaust port 150B may be provided with 2 or more. In addition, one of the first exhaust port 150A and the second exhaust port 150B may be omitted.
As described above, the exhaust port closest to the downstream wall 120 among the first exhaust port 150A and the second exhaust port 150B is referred to as a "specific exhaust port". In the example shown in fig. 1 and 2, one each of the first exhaust port 150A and the second exhaust port 150B is provided. The first exhaust port 150A and the second exhaust port 150B are arranged at positions facing each other in a plan view. Therefore, in this case, both the first exhaust port 150A and the second exhaust port 150B are "specific exhaust ports".
Hereinafter, in the present application, in the first melting furnace 100, the upstream side of the specific exhaust port is referred to as "first Partition (PA)", and the downstream side of the specific exhaust port is referred to as "second Partition (PB)".
The respective burners 1A to 7A included in the first burner group 140A are divided into: the burners 1A to 3A arranged in the "first partition PA" and the burners 4A to 7A arranged in the "second partition PB". Similarly, the respective burners 1B to 7B included in the second burner group 140B are divided into: burners 1B to 3B arranged in the "first partition PA" and burners 4B to 7B arranged in the "second partition PB".
Referring again to fig. 1 and 2, the first melting furnace 100 further has a first supply port 135A and a second supply port 135B through which a dilution gas can be supplied into the first melting furnace 100. The first supply port 135A is disposed on the first side wall 130A, and the second supply port 135B is disposed on the second side wall 130B.
In addition, the first melting furnace 100 has a partition wall 160 in the melting portion BC. The partition wall 160 is disposed so as to extend parallel to the upstream wall 110 and the downstream wall 120. However, since the bottom of the partition wall 160 is open, the molten glass MG flows from the upstream side (upstream wall 110 side) to the downstream side (downstream wall 120 side) through the partition wall 160 along the extending direction (X direction in fig. 1 and 2) of the first melting furnace 100.
By providing such a partition wall 160, the molten glass MG in the melting portion BC can be homogenized. However, the partition wall 160 may be omitted.
The first melting furnace 100 of such a structure is used in the following manner.
First, glass raw material MA is supplied from inlet 112 of upstream wall 110 to melting section BC.
The glass raw material MA is heated by flames of the respective burners 1A to 7A and 1B to 7B contained in the first burner group 140A and the second burner group 140B, thereby forming a molten glass MG.
The molten glass MG is accommodated in the melting portion BC and flows downstream in the extending direction. The melting portion BC is provided with a partition wall 160. Accordingly, the molten glass MG flows in the downstream direction through the bottom of the partition wall 160. At this time, movement of "foreign matter" such as unmelted components, which may affect uniformity of the manufactured glass product, is hindered. Accordingly, the molten glass MG is homogenized by passing it through the partition wall 160.
Then, the molten glass MG reaching the downstream wall 120 is discharged from the take-out port 122 and conveyed to the next device of the glass manufacturing apparatus.
The combustion exhaust gas generated by the combustion of each of the burners 1A to 7A and 1B to 7B is discharged through the first exhaust port 150A and the second exhaust port 150B.
Here, in the first melting furnace 100, 40% to 100% of the total combustion heat per 1 hour supplied from the first burner group 140A and the second burner group 140B is supplied from the oxygen-supporting burner. In other words, 0 to 60% of the total combustion heat is supplied by the air-assisted burner.
By selecting the total combustion heat supplied from the oxygen combustion burner in this manner, the heat efficiency in the first melting furnace 100 can be significantly improved as compared with the conventional one.
Further, the first melting furnace 100 has a first supply port 135A on the first side wall 130A and a second supply port 135B on the second side wall 130B. The first supply port 135A and the second supply port 135B are disposed at positions opposite to each other in a plan view of the first melting furnace 100.
The first supply port 135A is disposed at a position 0.3L or more from a specific exhaust port (for example, the first exhaust port 150A) and 0.3L or less from the downstream wall 120 along the extending direction of the first melting furnace 100.
Similarly, the second supply port 135B is disposed at a position that is 0.3L or more from a specific exhaust port (for example, the second exhaust port 150B) and less than the downstream wall 1200.3L along the extending direction of the first melting furnace 100.
As described above, in this case, the diluent gas supplied from the first supply port 135A and the second supply port 135B can be sufficiently dispersed in the first melting furnace 100. Therefore, in the first melting furnace 100, the concentration of moisture contained in the combustion exhaust gas can be significantly reduced, and as a result, the amount of moisture contained in the molten glass MG can be significantly reduced.
(description of the parts)
Next, each part of the glass melting furnace constituting one embodiment of the present invention will be described in more detail.
Here, for clarity, the first melting furnace 100 will be described below as an example. Accordingly, reference numerals shown in fig. 1 and 2 are used in the description of the respective parts.
(first melting furnace 100)
The first melting furnace 100 is applied as one device included in a glass manufacturing apparatus. Typically, glass manufacturing equipment has a glass melting furnace, a forming apparatus, and a conveyor connecting the two.
In the first melting furnace 100, a width between the first side wall 130A and the second side wall 130B is denoted by W (refer to fig. 1). Here, the width W is defined as a distance L from an innermost position of the first side wall 130A to an innermost position of the second side wall 130B.
In the first melting furnace 100, L/W is, for example, in the range of 2 to 5.
(first burner group 140A, second burner group 140B)
As described above, in the first melting furnace 100, 40% to 100% of the total combustion heat per 1 hour supplied from the first burner group 140A and the second burner group 140B is supplied from the oxygen-supporting burner.
By selecting the total combustion heat supplied from the oxygen combustion burner in this manner, the heat efficiency in the first melting furnace 100 can be significantly improved as compared with the conventional one.
In addition, 50% to 100% of the combustion heat per 1 hour in the first partition PA may be supplied from the oxygen-supporting burner.
On this basis or separately therefrom, 20% to 100% of the combustion heat per 1 hour in the second partition PB can be supplied by the oxygen-assisted burner.
In the example shown in fig. 1, in a plan view of the first melting furnace 100, the burners 1A to 7A included in the first burner group 140A and the burners 1B to 7B included in the second burner group 140B are arranged to face each other. However, this is merely an example, and the relative positions of the respective burners 1A to 7A included in the first burner group 140A and the respective burners 1B to 7B included in the second burner group 140B are not particularly limited. For example, the burners 1A to 7A and the burners 1B to 7B may be arranged so as to be offset from each other in the extending direction of the first melting furnace 100.
The burners 1A to 7A included in the first burner group 140A are not necessarily arranged at equal intervals. For example, the burners 1A to 7A may be arranged at uneven intervals along the extending direction of the first melting furnace 100. The same applies to the second burner group 140B.
In addition, the number of burners included in the first burner group 140A and the second burner group 140B is not particularly limited. For example, the first burner group 140A and the second burner group 140B may include less than 7 burners or 8 burners or more, respectively.
In addition, in the first burner group 140A, the number of burners included in the first partition PA and the second partition PB is not particularly limited. The same applies to the second burner group 140B.
(first exhaust port 150A, second exhaust port 150B)
As described above, the exhaust port disposed at the most downstream side of the first exhaust port 150A and the second exhaust port 150B is referred to as a specific exhaust port. However, in the example shown in fig. 1 and 2, the first exhaust port 150A and the second exhaust port 150B are each provided at a position facing each other. Therefore, in this case, any one of the one exhaust port 150A and the second exhaust port 150B may be referred to as a specific exhaust port.
The specific exhaust port may be disposed at a position 0.3L to 0.7L from the upstream wall 110 along the extending direction of the first melting furnace 100.
In the case where there is one of the first exhaust port 150A and the second exhaust port 150B, the position of the second exhaust port 150B may be shifted from the first exhaust port 150A by 0L to 0.2L along the extending direction of the first melting furnace 100 in a plan view of the first melting furnace 100.
(first supply port 135A and second supply port 135B)
The first supply port 135A and the second supply port 135B serve as supply ports for the dilution gas.
The diluent gas supplied from the first supply port 135A and the second supply port 135B is not particularly limited as long as it does not contain moisture. The diluent gas may be, for example, an oxidizing gas or an inactive gas.
The oxidizing gas may be air, oxygen, or the like. The inert gas may be nitrogen or the like.
The total supply amount of the diluent gas is preferably in the range of 0.1 to 1 in terms of the volume ratio relative to the amount of fuel used in the first burner group 140A and the second burner group 140B.
The diluent gas is preferably heated prior to supply. By supplying the heated diluent gas, a decrease in temperature in the vicinity of the first supply port 135A and the second supply port 135B can be suppressed. The temperature of the diluent gas is, for example, 400℃or higher, preferably 450℃or higher.
One of the first supply port 135A and the second supply port 135B may be omitted.
In the example shown in fig. 1 and 2, the first supply port 135A and the second supply port 135B are arranged at positions facing each other in a plan view of the first melting furnace 100.
However, this is merely an example, and the installation position of the second supply port 135B is not particularly limited, and the second supply port 135B may be disposed at any position of the second side wall 130B.
That is, in one embodiment of the present invention, when both the first supply port 135A and the second supply port 135B are present, at least one of them may be configured to satisfy the above-described features. Specifically, at least one of the first supply port 135A and the second supply port 135B may be disposed at a distance of 0.3L or more from the specific exhaust port and 0.3L or less from the downstream wall 120 along the extending direction of the first melting furnace 100.
(another glass melting furnace according to one embodiment of the present invention)
Next, another glass melting furnace according to an embodiment of the present invention will be described with reference to fig. 3 and 4.
Fig. 3 shows a schematic plan view of another glass melting furnace (hereinafter referred to as "second melting furnace") according to an embodiment of the present invention. In addition, fig. 4 shows a schematic side view of the second melting furnace shown in fig. 3.
As shown in fig. 3 and 4, the second melting furnace 200 has the same structure as the first melting furnace 100 described above. For example, the second melting furnace 200 includes an upstream wall 210, a downstream wall 220, a first sidewall 230A, a second sidewall 230B, a first burner group 240A, a second burner group 240B, and the like.
However, in general, the arrangement of the first and second exhaust ports 250A and 250B and the arrangement of the first and second supply ports 235A and 235B of the second melting furnace 200 are different from those of the first melting furnace 100.
That is, in the second melting furnace 200, the first exhaust port 250A and the second exhaust port 250B are each arranged on the upstream side of the first burner group 240A and the second burner group 240B. The first exhaust port 250A and the second exhaust port 250B are disposed so as to face each other in a plan view of the second melting furnace 200. Thus, both the first exhaust port 250A and the second exhaust port 250B are "specific exhaust ports".
As a result of the above arrangement, in the second melting furnace 200, no burner is arranged on the upstream side of the specific exhaust port (for example, the first exhaust port 250A), that is, in the first partition PA, and all the burners are arranged on the downstream side of the specific exhaust port, that is, in the second partition PB.
Here, in the second melting furnace 200, 40% to 100% of the total combustion heat per 1 hour supplied from the first burner group 240A and the second burner group 240B is supplied from the oxygen-supporting burner.
In the second melting furnace 200, unlike the first melting furnace 100, the first supply port 235A is arranged between the burner 6A and the burner 7A included in the first burner group 240A. Similarly, the second supply port 235B is disposed between the burner 6B and the burner 7B included in the second burner group 240B.
However, in the second melting furnace 200, when the distance from the upstream wall 210 to the downstream wall 220 is L, the first supply port 235A is arranged at a position 0.3L or more and 0.3L or less from the specific exhaust port (for example, the first exhaust port 250A) in the extending direction of the second melting furnace 200.
Similarly, the second supply port 235B is also disposed at a position 0.3L or more from the specific exhaust port and 0.3L or less from the downstream wall 220 in the extending direction of the second melting furnace 200.
It is apparent to those skilled in the art that the same effects as those of the first melting furnace 100 can be obtained in the second melting furnace 200 having such a structure.
That is, the heat efficiency in the second melting furnace 200 can be significantly improved even in the second melting furnace 200 as compared with the conventional one.
In addition, in the second melting furnace 200, the dilution gas supplied from the first supply port 235A and the second supply port 235B can be sufficiently dispersed in the second melting furnace 200, and the concentration of the moisture contained in the combustion exhaust gas can be significantly reduced. In addition, as a result, the amount of moisture contained in the molten glass MG can be significantly reduced.
(another glass melting furnace according to one embodiment of the present invention)
Next, another glass melting furnace according to an embodiment of the present invention will be described with reference to fig. 5 and 6.
A schematic top view of another glass melting furnace (hereinafter referred to as a "third melting furnace") of one embodiment of the present invention is shown in fig. 5. Fig. 6 is a schematic side view of the third melting furnace shown in fig. 5.
As shown in fig. 5 and 6, the third melting furnace 300 has the same structure as the first melting furnace 100. For example, the third melting furnace 300 includes an upstream wall 310, a downstream wall 320, a first side wall 330A, a second side wall 330B, a first burner group 340A, a second burner group 340B, and the like.
However, in general, the third melting furnace 300 is different from the above-described first and second melting furnaces 100 and 200 in that a chamber 380 is further provided on the downstream side of the downstream wall 320.
A narrow passageway 382 is disposed between the downstream wall 320 and the chamber 380. It should be noted that no burner is provided on the sidewall of the chamber 380.
By providing such a chamber 380, the temperature of the molten glass MG can be made uniform.
In the third melting furnace 300, the first burner group 340A has a total of 4 burners (burners 1A to 4A). Similarly, the second burner group 340B has a total of 4 burners (burners 1B to 4B).
In the third melting furnace 300, the first exhaust port 350A is disposed between the burner 1A and the burner 2A included in the first burner group 340A, and the second exhaust port 350B is disposed between the burner 1B and the burner 2B included in the second burner group 340B.
The first exhaust port 350A and the second exhaust port 350B are disposed so as to face each other in a plan view of the third melting furnace 300. Thus, both the first exhaust port 350A and the second exhaust port 350B are "specific exhaust ports".
As a result of the above arrangement, in the third melting furnace 300, only the burners 1A in the first burner group 340A are arranged on the upstream side of the specific exhaust port (for example, the first exhaust port 350A), that is, in the first partition PA, and the remaining burners (burners 2A to 4A) are arranged on the downstream side of the specific exhaust port, that is, in the second partition PB. Similarly, in the second burner group 340B, only the burner 1B is disposed in the first partition PA, and the remaining burners (burners 2B to 4B) are disposed in the second partition PB.
Here, in the third melting furnace 300, 40% to 100% of the total combustion heat per 1 hour supplied from the first burner group 340A and the second burner group 340B is supplied from the oxygen-supporting burner.
In the first section PA, 50% to 100% of the combustion amount per 1 hour may be supplied from the oxygen-assisted burner. In the second zone PB, 20% to 100% of the combustion amount per 1 hour may be supplied from the oxygen combustion burner.
In the third melting furnace 300, the first supply port 335A is disposed downstream of the burners 4A included in the first burner group 340A. Similarly, the second supply port 335B is disposed downstream of the burner 4B included in the second burner group 340B.
However, in the third melting furnace 300, when the distance from the upstream wall 310 to the downstream wall 320 is L, the first supply port 335A is arranged at a position that is 0.3L or more and less than the downstream wall 3200.3L from a specific exhaust port (for example, the first exhaust port 350A) in the extending direction of the third melting furnace 300.
Similarly, the second supply port 335B is also disposed at a position 0.3L or more from the specific exhaust port and 0.3L or less from the downstream wall 320 in the extending direction of the third melting furnace 300.
It is apparent to those skilled in the art that the same effects as those of the first melting furnace 100 and the second melting furnace 200 can be obtained in the third melting furnace 300 having such a structure.
That is, even in the third melting furnace 300, the heat efficiency in the third melting furnace 300 can be significantly improved as compared with the conventional one.
In the third melting furnace 300, the diluent gas supplied from the first supply port 335A and the second supply port 335B can be sufficiently dispersed in the third melting furnace 300, and the concentration of the moisture contained in the combustion exhaust gas can be significantly reduced. In addition, as a result, the amount of moisture contained in the molten glass MG can be significantly reduced.
In the above, the glass melting furnaces according to the embodiment of the present invention are described by taking the first to third melting furnaces 100 to 300 as an example. However, the glass melting furnace according to one embodiment of the present invention is not limited to the above embodiment. In addition to this, various embodiments will be apparent to those skilled in the art.
(method for producing glass article according to one embodiment of the invention)
Next, a method for manufacturing a glass product according to an embodiment of the present invention will be described with reference to fig. 7.
Fig. 7 schematically shows a flow of a method for manufacturing a glass product according to an embodiment of the present invention.
As shown in fig. 7, a method for manufacturing a glass product according to an embodiment of the present invention (hereinafter referred to as "first method") includes:
A melting step (step S110) of melting a glass raw material to form molten glass;
a conveying step (step S120) of conveying molten glass; and
a molding step (step S130) of molding the molten glass.
Hereinafter, each step will be described.
(Process S110)
First, a glass raw material is melted using a glass melting furnace, thereby forming molten glass. The composition of the glass raw material is not particularly limited.
The glass melting furnace according to one embodiment of the present invention is used as a glass melting furnace. For example, glass melting furnaces such as the first to third melting furnaces 100 to 300 described above may be used.
For example, when the first melting furnace 100 is used as the glass melting furnace, the glass raw material MA supplied from the inlet 112 of the upstream wall 110 is heated by the flames of the burners 1A to 7A included in the first burner group 140A and the burners 1B to 7B included in the second burner group 140B. Thereby forming molten glass MG. The molten glass thus formed is discharged from the discharge port 122.
In the case of using the glass melting furnace according to the embodiment of the present invention as the glass melting furnace, 40% to 100% of the total combustion heat per 1 hour supplied from the first burner group and the second burner group is supplied from the oxygen combustion-supporting burner. Therefore, the thermal efficiency in the glass melting furnace can be significantly improved.
In addition, in the case of using the glass melting furnace according to the embodiment of the present invention, the diluent gas supplied from the diluent gas supply port can be sufficiently dispersed in the melting furnace. Therefore, the concentration of moisture contained in the combustion exhaust gas can be significantly reduced, and as a result, the amount of moisture contained in the molten glass MG can be significantly reduced.
(Process S120)
The formed molten glass is then conveyed to a forming apparatus by a conveying apparatus.
(Process S130)
The conveyed molten glass is then formed in a forming apparatus. Thereby forming a glass ribbon. In addition, the glass ribbon is slowly cooled, thereby manufacturing a glass article. The glass article may be cut to the desired size, if desired.
The glass article produced may be an alkali-free glass.
The alkali-free glass may contain, in mass% on an oxide basis:
SiO 2 ：54％～73％、
Al 2 O 3 ：10％～23％、
B 2 O 3 ：0.1％～12％、
MgO：0～12％、
CaO：0～15％、
SrO:0 to 16%, and
BaO：0～15％，
MgO+CaO+SrO+BaO：8％～26％。
in addition, the beta-OH of the glass product produced can be in the range of 0.3mm -1 ～0.45mm -1 Within a range of (2).
Here, β—oh is an index indicating the amount of moisture in the glass, and a larger value indicates a larger amount of moisture in the glass.
In addition, in terms of mass% based on oxide, the conversion in the produced glass product is Fe 2 O 3 The total iron of (2) may be in the range of 0.005% to 0.1%. In particular, in terms of Fe 2 O 3 Converted to Fe in total iron of (2) 2 O 3 The mass ratio (Fe-redox) of the ferrous iron (II) may be in the range of 50% to 80%.
Examples
Hereinafter, examples of the present invention will be described. In the following description, examples 1 to 3 are examples, and examples 11 to 13 are comparative examples.
Example 1
The glass raw material is melted using a glass melting furnace such as the first melting furnace 100 described above.
The glass raw material is alkali-free glass having the following composition in mass% on the basis of oxides:
SiO 2 ：54％～73％、
Al 2 O 3 ：10％～23％、
B 2 O 3 ：0.1％～12％、
MgO：0～12％、
CaO：0～15％、
SrO:0 to 16%, and
BaO：0～15％。
mgo+cao+sro+bao=8% to 26%.
In the glass melting furnace, the first burner group and the second burner group were each composed of 7 burners in total.
In addition, a first exhaust port is provided in the first side wall, and a second exhaust port is provided in the second side wall. The first exhaust port and the second exhaust port are arranged at positions opposed to each other in a plan view. Thus, both the first exhaust port and the second exhaust port are specific exhaust ports.
As shown in fig. 1 and 2, the number of burners arranged in the first partition PA is 6, i.e., 1A to 3A and 1B to 3B, and the number of burners arranged in the second partition PB is 6, i.e., 4A to 7A and 4B to 7B. In addition, all the burners of the first burner group and the second burner group are oxygen combustion-supporting burners.
The first side wall and the second side wall are respectively provided with a supply port for dilution gas. The first supply port and the second supply port are disposed at positions opposite to each other in a plan view of the glass melting furnace.
The distance between the first supply port (and the second supply port) and the specific exhaust port along the extending direction of the glass melting furnace was set to 0.55L. In addition, the distance between the first supply port (and the second supply port) and the downstream wall along the extending direction of the glass melting furnace was set to 0.3L or less.
As the dilution gas, air heated to 400 ℃ was used.
The contribution of the oxygen-fired burner to the total heat supplied was 100%. In the first partition PA, the contribution ratio of the oxygen-assisted burner to the supplied heat is 100%. Similarly, the contribution of the oxygen-fired burner to the supplied heat in the second partition PB is 100%.
Example 2
The glass raw material was melted using the same glass melting furnace as in example 1.
However, in this example 2, the burner 1A and the burners 5A to 7A in the first burner group are set as air-assisted burners. Similarly, the burner 1B and the burners 5B to 7B in the second burner group are set as air-assisted burners. The remaining burners are set as oxygen-fired burners.
The contribution of the oxygen-fired burner to the total heat supplied was 44%. In the first partition PA, the contribution ratio of the oxygen-assisted burner to the supplied heat was 71%. The contribution of the oxygen-fired burner to the supplied heat in the second partition PB was 24%.
Example 3
The glass raw material was melted using the same glass melting furnace as in example 1.
However, in this example 3, the burner 1A and the burner 7A in the first burner group are set as air-assisted burners. Similarly, the burner 1B and the burner 7B in the second burner group are set as air-assisted burners. The remaining burners are set as oxygen-fired burners.
The contribution of the oxygen-fired burner to the total heat supplied was 72%. In the first partition PA, the contribution ratio of the oxygen-assisted burner to the supplied heat was 71%. The contribution of the oxygen-fired burner to the supplied heat in the second partition PB was 72%.
Example 11
The glass raw material was melted using the same glass melting furnace as in example 1.
However, in this example 11, all of the first burner groups were set as oxygen-supporting burners. Similarly, the second burner group is set as oxygen-assisted burners in its entirety. In this example 11, the supply port for the diluent gas was not provided, and the diluent gas was not supplied.
The contribution of the oxygen-fired burner to the total heat supplied was 100%. In the first partition PA, the contribution ratio of the oxygen-assisted burner to the supplied heat is 100%. Similarly, the contribution of the oxygen-fired burner in the second partition PB to the supplied heat is 100%.
Example 12
The glass raw material was melted using the same glass melting furnace as in example 1.
However, in this example 12, all of the first burner groups were set as air-assisted burners. Similarly, the second burner group is set as all air-assisted burners. In this example 12, a supply port for the diluent gas was not provided, and the diluent gas was not supplied.
The contribution rate of the oxygen-assisted burner to the total heat supplied was 0%. In the first partition PA, the contribution ratio of the oxygen-assisted burner to the supplied heat is 0%. Similarly, the contribution rate of the oxygen-fired burner to the supplied heat in the second partition PB is 0%.
Example 13
The glass raw material was melted using the same glass melting furnace as in example 1.
However, in this example 13, all of the first burner groups were set as oxygen-supporting burners. Similarly, the second burner group is set as oxygen-assisted burners in its entirety.
The contribution of the oxygen-fired burner to the total heat supplied was 100%. In the first partition PA, the contribution ratio of the oxygen-assisted burner to the supplied heat is 100%. Similarly, the contribution of the oxygen-fired burner in the second partition PB to the supplied heat is 100%.
In addition, in example 13, the distance between the first supply port (and the second supply port) and the specific exhaust port along the extending direction of the glass melting furnace was set to 0.1L. In addition, the distance between the first supply port (and the second supply port) and the downstream wall along the extending direction of the glass melting furnace is set to be greater than 0.3L.
Table 1 below shows the structure of the glass melting furnace used in each example.
(evaluation)
In each example, the fuel usage amount per 1 hour was evaluated. In addition, the volume ratio of the diluent gas to the fuel supply amount was calculated. Further, β -OH in the molten glass obtained in each example was evaluated.
The β -OH was evaluated as follows.
First, the moisture concentration and the like contained in the gas after combustion are calculated from the composition and the like of the fuel and the gas combusted by each burner. Next, the distribution of the moisture concentration in the atmosphere in the melting portion is calculated in consideration of the flow of the burned gas to the first exhaust port and the second exhaust port. Then, the amount of water finally diffused into the molten glass is calculated from the distribution of the water concentration and the average flow rate of the molten glass, and converted into β -OH contained in the glass after production.
The results obtained in each example are summarized in table 2 below.
TABLE 2
In table 2, the column "fuel usage" indicates the standard value of the fuel usage in example 11. That is, the fuel usage amount in example 11 was set to 100, and the "fuel usage amount" in each example was expressed in terms of the ratio with respect to the fuel usage amount.
From the obtained results, it was found that in example 11 in which all the burners were set as oxygen-assisted burners, the fuel consumption was suppressed to be low. However, it can be seen that in example 11, no diluent gas was supplied, and that β -OH in the glass was highest.
In example 12 in which all the burners were set as air-assisted burners without supplying a diluent gas, it was found that the amount of fuel used was extremely large although the β -OH content in the glass was suppressed to be low.
In example 13, the diluent gas was supplied, but β—oh was still high. This is presumed to be because: in example 13, the distance between the supply port of the dilution gas and the downstream wall was long, and the supply port of the dilution gas was relatively close to the specific exhaust port, and the dilution gas was not sufficiently dispersed throughout the glass melting furnace.
On the other hand, in examples 1 to 3 in which the first supply port and the second supply port were provided so that the distance between the first supply port and the specific exhaust port along the extending direction of the glass melting furnace was set to 0.55L and the distance between the first supply port and the downstream wall was set to 0.3L or less, β—oh was significantly suppressed. In examples 1 to 3, the fuel consumption was also significantly suppressed.
When the contribution ratio of the oxygen combustion burner to the total combustion heat is set to 40% to 100% and the supply port of the diluent gas is provided at an appropriate position in this manner, the amount of water contained in the molten glass can be significantly reduced and the thermal efficiency can be significantly improved.
Claims (17)
1. A glass melting furnace, wherein the glass melting furnace has an upstream wall and a downstream wall opposite to each other, and a first side wall and a second side wall opposite to each other,
a first burner group comprising oxygen-fired burners is arranged on the first side wall, a second burner group comprising oxygen-fired burners is arranged on the second side wall,
40 to 100% of the total combustion heat per 1 hour supplied by the first burner group and the second burner group is supplied by the oxygen-assisted burner, 0 to 60% of the total combustion heat is supplied by the air-assisted burner,
the first side wall and/or the second side wall has an exhaust port for exhausting combustion exhaust gas to the outside of the system, the exhaust port closest to the downstream wall is referred to as a specific exhaust port,
the first side wall or the second side wall has a supply port for supplying a dilution gas into the glass melting furnace,
When the distance from the upstream wall to the downstream wall is L and the direction of L is referred to as the extending direction,
the supply port is disposed at a position that is 0.3L or more from the specific exhaust port in the extending direction and 0.3L or less from the downstream wall in the extending direction.
2. The glass melting furnace of claim 1, wherein the dilution gas comprises an oxidizing gas or an inactive gas.
3. The glass melting furnace according to claim 1 or 2, wherein the temperature of the dilution gas is 400 ℃ or higher.
4. The glass melting furnace according to any one of claims 1 to 3, wherein a volume ratio of a supply amount of the dilution gas from the supply port to a use amount of the fuel in the first burner group and the second burner group is in a range of 0.1 to 1.
5. The glass melting furnace according to any one of claims 1 to 4, wherein 20% to 100% of the combustion heat per 1 hour at the downstream side of the specific exhaust port is supplied from the oxygen-supporting burner.
6. The glass melting furnace according to any one of claims 1 to 5, wherein 50% to 100% of the combustion heat per 1 hour at the upstream side of the specific exhaust port is supplied from the oxygen-supporting burner.
7. The glass melting furnace according to any one of claims 1 to 6, wherein the specific vent is arranged at a position 0.3L to 0.7L from the upstream wall along the extending direction.
8. The glass melting furnace according to any one of claims 1 to 7, wherein,
a first exhaust port is provided on the first sidewall,
a second exhaust port is provided on the second sidewall.
9. The glass melting furnace according to claim 8, wherein,
one for each of the first and second exhaust ports,
the second exhaust port is arranged at a position offset from the first exhaust port by 0L to 0.2L in the extending direction.
10. The glass melting furnace according to any one of claims 1 to 9, wherein,
the first sidewall has a first supply port,
the second side wall has a second supply port,
the first supply port and the second supply port are disposed at equal distances from the downstream wall.
11. The glass melting furnace according to any one of claims 1 to 10, wherein L/w=2 to 5 when a distance between the first side wall and the second side wall is set to a width W.
12. The glass melting furnace according to any one of claims 1 to 11, wherein a partition wall for guiding molten glass is provided between the upstream wall and the downstream wall,
The molten glass flows at the bottom of the glass melting furnace while passing through the partition wall.
13. A manufacturing apparatus that is an apparatus for manufacturing glass articles, wherein the manufacturing apparatus has:
a glass melting furnace,
Forming device
A conveying device connecting the glass melting furnace and the forming device,
the glass melting furnace is the glass melting furnace according to any one of claims 1 to 12.
14. A manufacturing method, which is a manufacturing method of a glass product, wherein the manufacturing method has:
a melting step,
Conveying process
In the forming process, the forming step is carried out,
the glass melting furnace according to any one of claims 1 to 12 is used in the melting step.
15. The manufacturing method according to claim 14, wherein,
the glass article is comprised of alkali-free glass,
the alkali-free glass contains, in mass% based on oxides:
SiO 2 ：54％～73％、
Al 2 O 3 ：10％～23％、
B 2 O 3 ：0.1％～12％、
MgO：0～12％、
CaO：0～15％、
SrO:0 to 16%, and
BaO:0 to 15 percent, and
MgO+CaO+SrO+BaO accounts for 8 to 26 percent.
16. The method of manufacturing of claim 14 or 15, wherein the glass article has a beta-OH of 0.3mm -1 ～0.45mm -1 Within a range of (2).
17. The manufacturing method according to any one of claims 14 to 16, wherein,
In terms of mass% on an oxide basis, in the glass article is converted to Fe 2 O 3 The total iron of (2) is in the range of 0.005% -0.1%,
in terms of Fe 2 O 3 Converted to Fe in total iron of (2) 2 O 3 The mass ratio (Fe-redox) of the ferrous iron is in the range of 50% -80%.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-025100 | 2022-02-21 | ||
| JP2022025100A JP2023121646A (en) | 2022-02-21 | 2022-02-21 | Glass melting furnace, and facility and method for manufacturing glass product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116621423A true CN116621423A (en) | 2023-08-22 |
Family
ID=87612243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310079702.2A Pending CN116621423A (en) | 2022-02-21 | 2023-01-17 | Glass melting furnace, glass product manufacturing apparatus, and glass product manufacturing method |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2023121646A (en) |
| KR (1) | KR20230125741A (en) |
| CN (1) | CN116621423A (en) |
| TW (1) | TW202346218A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5598541B2 (en) | 2010-04-26 | 2014-10-01 | 旭硝子株式会社 | Glass melting furnace and glass melting method |
-
2022
- 2022-02-21 JP JP2022025100A patent/JP2023121646A/en active Pending
-
2023
- 2023-01-17 CN CN202310079702.2A patent/CN116621423A/en active Pending
- 2023-02-01 KR KR1020230013454A patent/KR20230125741A/en unknown
- 2023-02-02 TW TW112103628A patent/TW202346218A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TW202346218A (en) | 2023-12-01 |
| KR20230125741A (en) | 2023-08-29 |
| JP2023121646A (en) | 2023-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6715319B2 (en) | Melting of glass | |
| CN103253864B (en) | Ultrawhite float glass process technology for making glass used for solar batteries | |
| CN102046541B (en) | Vacuum defoaming equipment, equipment for producing glass product, and method for producing glass product | |
| KR101300934B1 (en) | Method and apparatus for making glass sheet | |
| EP1077201B2 (en) | Method of boosting the heating in a glass melting furnace using a roof-mounted oxygen-fuel burner | |
| CN102137819A (en) | Process for obtaining glass and glass obtained | |
| CN103221352A (en) | Apparatus for manufacturing glass sheet and method for manufacturing glass sheet | |
| EP4103522B1 (en) | Feed material for producing colorless glass using submerged combustion melting | |
| TWI552972B (en) | A molten glass manufacturing apparatus, a method for producing a molten glass, and a method for manufacturing the same | |
| EP4038027B1 (en) | Selective chemical fining of small bubbles in glass | |
| EP4103523A1 (en) | Producing flint glass using submerged combustion melting | |
| JP2022542479A (en) | High-generation TFT-LCD glass substrate production line | |
| WO2011136086A1 (en) | Glass melting furnace and method for melting glass | |
| KR20150101925A (en) | Float process for producing a float glass pane and float glass pane | |
| KR101453629B1 (en) | Molten glass manufacturing device, molten glass manufacturing method, and sheet glass manufacturing method using the device and the method | |
| CN116621423A (en) | Glass melting furnace, glass product manufacturing apparatus, and glass product manufacturing method | |
| CN100339321C (en) | Apparatus and method for producing float glass having reduced defect density | |
| CN103228584A (en) | Apparatus for producing float plate glass and method for producing float plate glass | |
| CN116621424A (en) | Glass melting furnace, glass product manufacturing apparatus, and glass product manufacturing method | |
| US20110271717A1 (en) | System and method for control of glass transmittance | |
| EP3907196A1 (en) | Furnace for simultaneous continuous melting of multiple glasses | |
| US20230331615A1 (en) | Color streaked glass containers using cullet injection | |
| KR102255639B1 (en) | Melting method, and production method for alkali-free glass plate | |
| US20160122222A1 (en) | Feeder | |
| WO2014013913A1 (en) | Method for producing glass plate, and glass plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |