CN116177850A - Glass melting furnace and glass production method - Google Patents
Glass melting furnace and glass production method Download PDFInfo
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- CN116177850A CN116177850A CN202310281977.4A CN202310281977A CN116177850A CN 116177850 A CN116177850 A CN 116177850A CN 202310281977 A CN202310281977 A CN 202310281977A CN 116177850 A CN116177850 A CN 116177850A
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- 239000011521 glass Substances 0.000 title claims abstract description 159
- 238000002844 melting Methods 0.000 title claims abstract description 133
- 230000008018 melting Effects 0.000 title claims abstract description 133
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000005096 rolling process Methods 0.000 claims abstract description 68
- 239000005329 float glass Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 59
- 238000003490 calendering Methods 0.000 claims description 39
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 239000006066 glass batch Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 230000005587 bubbling Effects 0.000 claims description 7
- 241000251468 Actinopterygii Species 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000005192 partition Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 25
- 238000010438 heat treatment Methods 0.000 description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 239000006060 molten glass Substances 0.000 description 14
- 238000010790 dilution Methods 0.000 description 12
- 239000012895 dilution Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 239000003345 natural gas Substances 0.000 description 8
- 210000000481 breast Anatomy 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006124 Pilkington process Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000156 glass melt Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
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- 238000007670 refining Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 210000000779 thoracic wall Anatomy 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
- C03B7/06—Means for thermal conditioning or controlling the temperature of the glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B13/00—Rolling molten glass, i.e. where the molten glass is shaped by rolling
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
-
- 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
- C03B5/04—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in tank furnaces
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
-
- 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
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
The invention relates to the technical field of glass production, in particular to a glass melting furnace which comprises a melting part, a neck, a float main passage, a transverse passage, a rolling branch passage and an upper space separation device, wherein the rear end of the melting part is communicated with the front end of the float main passage through the neck, the rear end of the float main passage is provided with a float runner connected with a float forming device, the front end of the rolling branch passage is communicated with the float main passage through the transverse passage, the rear end of the rolling branch passage is provided with a rolling overflow port connected with the rolling forming device, the upper space separation device is arranged at the upper part inside the joint of the transverse passage and the float main passage and the upper part inside the joint of the transverse passage and the rolling branch passage, and temperature adjusting devices are arranged on the float main passage, the transverse passage and the rolling branch passage. And also relates to a glass production method realized by using the glass melting furnace. The upper space separating device can achieve the aim of partition temperature adjustment, realize the simultaneous production of float glass and calendared glass by one glass melting furnace, and ensure the yield.
Description
Technical Field
The invention relates to the technical field of glass production, in particular to a glass melting furnace and a glass production method realized by using the glass melting furnace.
Background
In the glass production industry, in order to facilitate control of the technological system of glass melting furnaces, usually only one melting furnace is used for producing glass products by one process, and when two glass products with different processes are produced, only two melting furnaces can be used for production respectively. Two melting furnaces are provided with two sets of process equipment matched with the furnaces, such as a fuel system, a melting furnace ventilation system, a batch system and the like. This results in a waste of land and a substantial increase in investment costs.
The larger the glass melting amount of a single glass melting furnace, the higher the melting rate, the lower the energy consumption of the furnace, and the lower the investment cost and the running cost of production. If two melting furnaces are replaced by one melting furnace, the glass melting amount of the melting furnace is increased, and the investment and operation cost of the furnace are reduced. With the deep realization of energy conservation and emission reduction, the glass production industry is a large consumer of energy consumption and a large consumer of carbon emission. The melting amount of a single kiln is improved, so that the unit energy consumption is reduced, and the method is an energy-saving and carbon-reducing way. Meanwhile, with the gradual popularization and application of photovoltaic power generation, the demand for ultra-thin ultra-white float glass and ultra-white photovoltaic rolled glass is increasing. Investment is increased by newly creating a factory for producing photovoltaic rolled glass, and investment is reduced by simultaneously producing high-quality float glass and high-quality rolled glass in a large-tonnage melting furnace, so that the diversity of products of an enterprise glass production line is increased, market change is flexibly adapted, and the operation benefit and risk resistance of enterprises are improved.
The invention patent application with publication number of CN113582508A discloses a glass melting furnace and a production line, wherein the glass melting furnace comprises a melting part, a main cooling part, a first branch cooling part and a second branch cooling part, and the melting part is used for melting glass raw materials to form glass melt; the main cooling part is communicated with the melting part through a neck, the first branch cooling part and the second branch cooling part are respectively arranged at two sides of the main cooling part, the first branch cooling part is communicated with the main cooling part through a first transverse passage, and the second branch cooling part is communicated with the main cooling part through a second transverse passage; at least one of the main cooling portion, the first branch cooling portion and the second branch cooling portion is a cooling portion of float glass melt, and at least one is a passage of rolled glass melt. The glass melting furnace is a three-wire glass melting furnace, so that one glass production line can simultaneously produce float glass and calendared glass.
The invention patent application with publication number of CN102408182A discloses a glass melting furnace for producing two low-iron flat glass, which comprises a glass melting furnace and a neck connected with the melting furnace, wherein the outlet end of the neck is connected with a transverse passage for glass solution to flow to two sides, at least one branch passage is connected with the transverse passage, and the port of each branch passage can be connected with a calendaring glass molding production device; at least one heating device is arranged on the transverse passage, each heating device is connected with a runner at the corresponding transverse passage, and the port of each runner can be connected with a float glass forming production device.
Both glass melting furnaces can realize the simultaneous production of float glass products and calendared glass products, but the two glass melting furnaces do not effectively isolate a transverse passage (transverse passage) and a main cooling part (runner), and when the temperature of the main cooling part (runner) is regulated, the temperature influences the temperature field of glass liquid of the transverse passage (transverse passage), so that the calendared glass yield is low.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention has been made to solve the technical problem of providing a glass melting furnace capable of realizing simultaneous production of float glass products and rolled glass products by one glass melting furnace and ensuring the yield of glass products.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a glass melting furnace, which comprises a melting part, a neck, a float main passage, a transverse passage, a rolling branch passage and an upper space separation device, wherein the rear end of the melting part is communicated with the front end of the float main passage through the neck, the rear end of the float main passage is provided with a float runner connected with a float forming device, the front end of the rolling branch passage is communicated with the float main passage through the transverse passage, the rear end of the rolling branch passage is provided with a rolling overflow port connected with the rolling forming device, the upper space separation device is arranged at the upper part inside the joint of the transverse passage and the float main passage and the upper part inside the joint of the transverse passage and the rolling branch passage, and temperature adjusting devices are arranged on the float main passage, the transverse passage and the rolling branch passage.
Preferably, the upper part of the inside of the neck is provided with an upper space divider.
Preferably, the upper space divider is any one of a rider arch, a fish maw arch, a flat arch, a suspended flat arch and a suspended wall.
Preferably, the centerline of the float main passage is collinear with the centerline of the melting portion, or alternatively, the centerline of the float main passage is parallel to the centerline of the melting portion and spaced 1500mm-2000mm apart.
Preferably, one lateral surface of the front end part of the float main passage is connected with a transverse passage, or two lateral surfaces of the front end part of the float main passage are respectively connected with a transverse passage; each transverse passage is connected with one calendaring branch passage.
Preferably, the melting part comprises a melting tank, the front part and the rear part of the melting tank are respectively provided with a melting belt and a clarifying belt, and a bottom bubbling device is arranged on the bottom of the melting belt in the melting tank.
Preferably, the bottom of the melting tank is of a stepped structure which gradually rises from front to back, and the height of each step of the stepped structure is 50mm-150mm.
The invention also provides a glass production method, which utilizes the glass melting furnace, and sequentially comprises the following steps: step one, preparing a glass batch; step two, the glass batch is put into a melting part, molten and clarified by the melting part to form glass liquid, and the glass liquid enters a float main passage through a neck; step three, a part of glass liquid entering the float main passage continuously flows through the float main passage and enters the float forming device through a float runner to be formed into float glass, and the other part of glass liquid enters the calendaring branch passage through a transverse passage and enters the calendaring forming device through a calendaring overflow port to be formed into calendared glass; in the second and third steps, the temperature of the flowing glass liquid is respectively adjusted by temperature adjusting devices on a float main passage, a transverse passage and a calendaring branch passage.
Preferably, in the first step, the chemical components of the glass prepared by melting the glass batch are as follows: siO (SiO) 2 70％～75％；Al 2 O 3 0.1％～1.0％；CaO 2 6％～10％；MgO 2 2％～4.5％；(Na 2 O+K 2 O)10％～15％；Fe 2 O 3 0.01％～1.6％；SO 3 0.2％。
Preferably, in the second step, the melting temperature of the melting part is 1575-1590 ℃, the clarifying temperature of the melting part is more than 1440 ℃, and the glass liquid temperature at the front part of the float main passage is regulated to 1250+/-50 ℃; in the third step, the temperature of the glass liquid at the float runner is regulated to 1100+/-50 ℃, the temperature of the glass liquid at the tail end of the transverse passage is regulated to 1150+/-50 ℃, and the temperature of the glass liquid at the calendering overflow port is regulated to 1050+/-50 ℃.
Compared with the prior art, the invention has obvious progress:
according to the invention, the temperature of glass liquid flowing through the float main passage, the transverse passage and the rolling branch passage is respectively regulated by the temperature regulating devices arranged on the float main passage, the transverse passage and the rolling branch passage, and the upper space separating device arranged at the upper part of the joint of the transverse passage and the float main passage separates the upper space of the transverse passage from the upper space of the float main passage and the upper space of the rolling branch passage separates the transverse passage from the upper space of the rolling branch passage by the upper space separating device arranged at the upper part of the joint of the transverse passage and the rolling branch passage, so that the mutual influence of the temperature and the air flow of the upper space of the transverse passage and the float main passage and the temperature and the air flow of the upper space of the transverse passage and the rolling branch passage are effectively reduced, the temperature regulation of the transverse passage, the float main passage and the rolling branch passage can be respectively and accurately controlled, the temperature of glass liquid entering the float forming device from the transverse passage and the rolling branch passage can be respectively accurately controlled, the glass product and the rolled glass product can be simultaneously produced by a glass melting furnace, and the glass product can be ensured, and the glass product yield of the glass product can be ensured.
Drawings
FIG. 1 is a schematic plan view of a glass melting furnace according to a first embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view taken along A-A in fig. 1.
Fig. 3 is a schematic cross-sectional view taken along the direction B-B in fig. 1.
Fig. 4 is a schematic cross-sectional view taken along the direction C-C in fig. 1.
FIG. 5 is a schematic plan view of a glass melting furnace according to a second embodiment of the present invention.
FIG. 6 is a schematic plan view of a glass melting furnace according to a third embodiment of the present invention.
Wherein reference numerals are as follows:
1. melting part
11. Melting tank
11a melting zone
11b clarifying zone
11c ladder structure
12. Bubbling device at bottom of pool
2. Neck clip
3. Float main passage
31. Float flow channel
4. Transverse passage
5. Calendering branch passage
51. Rolling overflow port
6. 6a, 6b, 6c upper space separating device
7. Material feeding port
8L hanging wall
9a, 9b and 9c temperature-regulating heating holes
10a, 10b, 10c temperature-regulating dilution air holes
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
Example 1
As shown in fig. 1 to 4, a first embodiment of the glass melting furnace of the present invention is shown. In the description of the present invention, the "front" side is defined as the left side of the paper of fig. 1, the "rear" side is defined as the right side of the paper of fig. 1, and the front-rear direction is also referred to as the longitudinal direction; the left side is the upper side of the paper of fig. 1, the right side is the lower side of the paper of fig. 1, and the left and right directions are also called transverse directions; the "upper" side is the paper outside of the paper of fig. 1, and the "lower" side is the paper inside of the paper of fig. 1.
Referring to fig. 1 to 4, the glass melting furnace of the first embodiment includes a melting portion 1, a neck 2, a float main passage 3, a lateral passage 4, a rolling branch passage 5, and an upper space division means 6, and the float main passage 3, the lateral passage 4, and the rolling branch passage 5 constitute a forming work portion. The melting section 1 is for melting glass batch materials (raw materials) into molten glass. The front end of the melting part 1 is provided with a feeding port 7, glass batch enters the melting part 1 from the feeding port 7, and the feeding port 7 is preferably provided with an L hanging wall 8 for sealing. The rear end of the melting part 1 is communicated with the front end of the float main passage 3 through the neck 2, and the rear end of the float main passage 3 is provided with a float runner 31 connected with a float forming device. The front end of the rolling branch passage 5 is communicated with the float main passage 3 through a transverse passage 4, and the rear end of the rolling branch passage 5 is provided with a rolling overflow port 51 connected with a rolling forming device. An upper space divider 6, designated as an upper space divider 6a, is provided at the upper part of the inside of the junction between the lateral passage 4 and the float main passage 3. The upper space dividing device 6a serves to divide the upper space between the lateral passage 4 and the float main passage 3, so that the mutual influence of the temperature and the air flow of the lateral passage 4 and the upper space of the float main passage 3 can be reduced, and the lateral passage 4 and the upper space of the float main passage 3 can be effectively isolated. An upper space divider 6, denoted as an upper space divider 6b, is provided at an upper portion inside the junction of the lateral passage 4 and the rolled branch passage 5. The upper space separating device 6b plays a role of separating the upper spaces of the transverse passage 4 and the rolling branch passage 5, so that the mutual influence of the temperature and the air flow of the upper spaces of the transverse passage 4 and the rolling branch passage 5 can be reduced, and the upper spaces of the transverse passage 4 and the rolling branch passage 5 can be effectively isolated. Temperature adjusting devices are arranged on the float main passage 3, the transverse passage 4 and the rolling branch passage 5, and the temperatures of glass liquid flowing through the float main passage 3, the transverse passage 4 and the rolling branch passage 5 can be respectively adjusted.
When the glass melting furnace of the first embodiment is used, high-temperature glass liquid formed by high-temperature melting of the melting part 1 flows into the float main passage 3 through the neck 2, and is split in the float main passage 3, one part of the high-temperature glass liquid continuously flows through the float main passage 3 and enters the float forming device through the float runner 31 to form float glass, the other part of the high-temperature glass liquid flows into the rolling branch passage 5 through the transverse passage 4 and enters the rolling forming device through the rolling overflow port 51 to form the rolled glass, and the temperature of the glass liquid flowing in the float main passage 3, the transverse passage 4 and the rolling branch passage 5 is respectively regulated through the temperature regulating devices arranged on the float main passage 3, the transverse passage 4 and the rolling branch passage 5, and because the upper space separating devices 6a and 6b separate the upper space of the transverse passage 4 from the float main passage 3, the upper space of the transverse passage 4 from the rolling branch passage 5, the temperature and the air flow of the upper space of the transverse passage 4 and the rolling branch passage 5 are mutually influenced, and the temperature of the upper space of the transverse passage 4 and the air flow of the rolling branch passage 5 are effectively reduced, so that the rolled glass product can be accurately controlled through the temperature regulating device and the rolling branch passage 4 and the rolling branch passage 5 respectively, and the temperature of the glass product can be accurately controlled, and the rolled product can be formed by the glass product can be produced, and the glass product can be accurately formed by the glass product and the glass can be accurately formed by the glass and the glass product and the glass.
Referring to fig. 2, in the first embodiment, preferably, an upper space-dividing means 6, denoted as upper space-dividing means 6c, is provided at an upper portion of the inside of the neck 2. The upper space separating device 6c plays a role of separating the upper space of the melting part 1 and the upper space of the float main passage 3, so that the mutual influence of the temperature and the air flow of the upper space of the melting part 1 and the float main passage 3 can be reduced, and the adjustment of the temperature of the molten glass in the float main passage 3 is facilitated.
In the first embodiment, the upper space divider 6a, 6b, 6c may be any one of a rider arch, a fish maw arch, a flat arch, a suspended flat arch, and a suspended wall. Of course, the upper space divider 6a, 6b, 6c is not limited to the rider arch or fish maw arch or flat arch or suspended wall, and other structures capable of performing space division may be employed.
In the first embodiment, the temperature adjusting device on the float main passage 3 is arranged on the breast wall of the float main passage 3, the temperature adjusting device on the float main passage 3 may include a natural gas heating system and a dilution air cooling system, and referring to fig. 2, multiple groups of temperature adjusting device mounting holes for mounting the temperature adjusting device may be sequentially arranged on the breast wall of the float main passage 3 at intervals along the flowing direction of the molten glass in the float main passage 3, and each group of temperature adjusting device mounting holes includes a temperature adjusting heating hole 9a connected with the natural gas heating system and a temperature adjusting dilution air hole 10a connected with the dilution air cooling system.
The temperature adjusting devices on the transverse passage 4 are arranged on the chest wall of the transverse passage 4, the temperature adjusting devices on the transverse passage 4 can comprise a natural gas heating system and a dilution air cooling system, referring to fig. 3, a plurality of groups of temperature adjusting device mounting holes for mounting the temperature adjusting devices can be sequentially arranged on the chest wall of the transverse passage 4 at intervals along the flowing direction of glass liquid in the transverse passage 4, and each group of temperature adjusting device mounting holes comprises a temperature adjusting heating hole 9b connected with the natural gas heating system and a temperature adjusting dilution air hole 10b connected with the dilution air cooling system.
The temperature adjusting device on the rolling branch passage 5 is arranged on the breast wall of the rolling branch passage 5, the temperature adjusting device on the rolling branch passage 5 can comprise a natural gas heating system and a dilution air cooling system, and referring to fig. 4, at least one group of temperature adjusting device mounting holes for mounting the temperature adjusting device can be arranged on the breast wall of the rolling branch passage 5 along the flowing direction of glass liquid in the rolling branch passage 5, and each group of temperature adjusting device mounting holes comprises a temperature adjusting heating hole 9c connected with the natural gas heating system and a temperature adjusting dilution air hole 10c connected with the dilution air cooling system.
In the temperature adjusting device adopted in the first embodiment, the natural gas heating system can adopt a spray gun taking natural gas as fuel, the gas consumption is adjusted according to the glass liquid temperature requirement of the forming process to adjust the glass liquid temperature, the flame of the spray gun is short flame, and the flame does not directly heat glass, so that secondary bubbles are prevented from being generated by the glass, and the quality of the glass is influenced; the dilution air cooling system can adopt a variable-frequency speed-regulating fan, the air inlet of the variable-frequency speed-regulating fan is provided with a filtering device, the air outlet of the variable-frequency speed-regulating fan is inclined upwards in wind direction angle, and the dilution air quantity entering the float main passage 3, the transverse passage 4 and the calendaring branch passage 5 is regulated according to the glass liquid temperature requirement of the forming process and is used for cooling the upper space in the passage. Therefore, control points of the float forming temperature and the calendaring forming temperature can form double PID control, and the requirement of forming temperature adjustment is met to the greatest extent.
In the first embodiment, the float forming apparatus is an existing apparatus, and the glass liquid with a temperature fine-tuned in the float main passage 3 enters the float runner 31, the flow rate and the flow velocity are controlled by the runner adjusting shutter, and then the glass liquid is sent into the tin bath chamber of the float forming apparatus to be formed into a float glass product by a float process. The calendaring forming device is the existing equipment, the glass liquid with the temperature finely regulated in the calendaring branch passage 5 passes through the calendaring overflow 51 to obtain the glass liquid with the surface flowing uniformly longitudinally, and then the glass liquid is sent into a calendaring chamber of the calendaring forming device to be formed into a calendared glass product through a calendaring process.
Preferably, the float main passage 3 is oriented parallel to the longitudinal direction of the melting portion 1. In the first embodiment, referring to fig. 1, the center line of the float main passage 3 is on the same line as the center line of the melting portion 1.
Preferably, the front end of the rolled branch passage 5 is connected to the breast wall of the lateral passage 4. Preferably, the lateral passage 4 is connected to a side surface of the front end portion of the float main passage 3. In the first embodiment, referring to fig. 1, two lateral sides (e.g. left side and right side) of the front end portion of the float main passage 3 are respectively connected with a transverse passage 4, each transverse passage 4 is connected with a calendaring branch passage 5, and each calendaring branch passage 5 is correspondingly provided with a calendaring forming device, so that a kiln three-wire glass melting furnace is formed, and the glass liquid is split into three parts in the float main passage 3: one part is that the liquid flow in the middle part of the float main passage 3 flows backwards and continuously flows through the float main passage 3 and enters the float forming device through the float runner 31 to form float glass, and the other two parts are that the liquid flow on two sides of the float main passage 3 respectively flows into the corresponding rolling branch passages 5 through the transverse passages 4 on two sides and enters the rolling forming device through the rolling overflow port 51 to form rolled glass.
Referring to fig. 1 and 2, in the first embodiment, a melting section 1 includes a melting tank 11, and the front and rear portions of the melting tank 11 are respectively provided as a melting zone 11a and a refining zone 11b. The melting belt 11a heats and melts the glass batch, and the heating mode can be any one or a combination of a plurality of upper single-side flame transverse heating, upper two-side flame simultaneous heating, bottom insertion of the melting tank 11 or side insertion electrode heating. The fining belt 11b is used for fining the molten glass formed by the melting belt 11a by heating and melting. The neck 2 is arranged between the clarifying zone 11b and the float main passage 3, the inlet end (front end) of the neck 2 is connected with the outlet end (rear end) of the clarifying zone 11b, and the outlet end (rear end) of the neck 2 is connected with the inlet end (front end) of the float main passage 3.
In order to enhance the clarification and homogenization degree of the molten glass, it is preferable that the bottom bubbling devices 12 are provided in the melting tank 11 on the bottom of the melting belt 11a, the bottom bubbling devices 12 are distributed in a row in the lateral direction, and the bottom bubbling devices 12 may be provided in one or more lateral rows. The bottom bubbling device 12 expands gas from the bottom of the tank, the gas drives the cold glass liquid at the bottom of the tank to rise, the heat transfer of the glass liquid is increased, the bubbles burst after rising to the liquid level, the liquid level glass liquid is pushed forward and backward, and the front material pile position of the glass melting furnace is stabilized.
Preferably, the bottom of the melting tank 11 is a stepped structure 11c gradually rising from front to back, and the height of each step of the stepped structure 11c is 50mm to 150mm. Thereby the depth of the lower part in the melting tank 11 gradually becomes shallower from front to back, and the effect of reducing the molten glass reflux of the refining zone 11b can be achieved.
In the first embodiment, preferably, the width of the neck 2 is smaller than the width of the melting portion 1, and the width of the neck 2 is also smaller than the width of the float main passage 3. The neck 2 is used for compressing and releasing molten glass.
Example two
As shown in FIG. 5, a second embodiment of the glass melting furnace of the present invention is shown. The second embodiment is basically the same as the first embodiment in that the details are not repeated, and the difference is that in the second embodiment, a lateral passage 4 is connected to a side (e.g., right side) of a front end portion of the float main passage 3, and one calendering branch passage 5 and a corresponding calendering device are provided. Thereby forming a kiln two-line glass melting furnace, and the molten glass is split into two parts in the float main passage 3: one part is that the liquid flow at the middle part and one side (such as the left side) of the float main passage 3 continuously flows through the float main passage 3 and enters the float forming device through the float runner 31 to be formed into float glass, and the other part is that the liquid flow at the other side (such as the right side) of the float main passage 3 flows into the calendaring branch passage 5 through the transverse passage 4 and enters the calendaring forming device through the calendaring overflow 51 to be formed into rolled glass. It can be appreciated that the arrangement form of the second embodiment has smaller investment in the reconstruction of the old kiln of the float glass melting furnace, the position change of the float main passage of the old kiln is smaller and even unchanged, and the cold repair reconstruction is simpler.
Example III
As shown in FIG. 6, a third embodiment of the glass melting furnace of the present invention is shown. The third embodiment is basically the same as the second embodiment in that the details are not repeated, and is different in that in the third embodiment, the center line of the float main passage 3 is parallel to the center line of the melting portion 1 and has an interval H, and the value of H is 1500mm-2000mm. It will be appreciated that the design of the third embodiment makes the dead angle of the glass flow at the front end of the float main channel 3 smaller and the glass flow smoother.
Example IV
Example four provides one example of a glass production process of the present invention. The glass production method of the fourth embodiment is implemented by using any one of the glass melting furnaces of the first embodiment, the second embodiment and the third embodiment, and sequentially includes the following steps.
Step one, preparing a glass batch. GlassThe batch is prepared from chemical raw materials and mineral raw materials and then is mixed and stirred uniformly. Preferably, the glass batch is melted to form glass with the following chemical components in percentage by weight: siO (SiO) 2 70％～75％；Al 2 O 3 0.1％～1.0％；CaO 2 6％～10％；MgO 2 2％～4.5％；(Na 2 O+K 2 O)10％～15％；Fe 2 O 3 0.01％～1.6％；SO 3 0.2 percent, and can be well applied to two processes of float forming and calendaring forming.
And step two, the glass batch prepared in the step one is put into a melting part 1 from a feed port 7, melted by a melting belt 11a of the melting part 1 and clarified by a clarifying belt 11b to form glass liquid, the glass liquid flows into a neck 2, and enters a float main passage 3 after being compressed and released by the neck 2, and the temperature of the glass liquid flowing through the float main passage 3 is adjusted by a temperature adjusting device on the float main passage 3. Preferably, in the second step, the melting temperature of the melting part 1 is 1575-1590 ℃, the clarifying temperature of the melting part 1 is more than 1440 ℃, and the temperature of the molten glass at the front part of the float main passage 3 is regulated to 1250+/-50 ℃ by a temperature regulating device arranged at the front part of the float main passage 3. Because the upper space separating device 6c is arranged at the upper part of the inside of the neck 2 and plays a role in separating the upper space of the melting part 1 and the upper space of the float main passage 3, the mutual influence of the temperature and the air flow of the upper space of the melting part 1 and the float main passage 3 can be reduced, and the adjustment of the temperature of the front glass liquid in the float main passage 3 is facilitated.
And thirdly, after the temperature is regulated in the second step, part of the glass liquid entering the float main passage 3 continuously flows through the float main passage 3 and enters the float forming device through the float runner 31 to be formed into float glass, and the other part of the glass liquid flows into the calendaring branch passage 5 through the transverse passage 4 and enters the calendaring forming device through the calendaring overflow port 51 to be formed into calendared glass. In the float main passage 3, the temperature of the molten glass in the float channel 31 was adjusted to 1100.+ -. 50 ℃ by a temperature adjusting device provided at the rear of the float main passage 3. In the lateral passage 4, the temperature of the molten glass flowing through the lateral passage 4 is adjusted by a temperature adjusting device provided in the lateral passage 4, and the temperature of the molten glass at the end of the lateral passage 4 (i.e., the end of the lateral passage 4 connected to the rolled branch passage 5) is adjusted to 1150.+ -. 50 ℃. In the rolling branch passage 5, the temperature of the molten glass flowing through the rolling branch passage 5 was adjusted by a temperature adjusting device, and the temperature of the molten glass at the rolling overflow port 51 was adjusted to 1050.+ -. 50 ℃.
Because the upper space separating device 6a is arranged at the upper part of the joint of the transverse passage 4 and the float main passage 3 and plays a role of separating the upper space of the transverse passage 4 and the float main passage 3, the mutual influence of the temperature and the air flow of the upper space of the transverse passage 4 and the float main passage 3 can be reduced; the upper space separating device 6b is arranged at the upper part of the joint of the transverse passage 4 and the rolling branch passage 5 and plays a role in separating the upper spaces of the transverse passage 4 and the rolling branch passage 5, so that the mutual influence of the temperature and air flow of the upper spaces of the transverse passage 4 and the rolling branch passage 5 can be reduced, the temperature adjustment in the transverse passage 4, the float main passage 3 and the rolling branch passage 5 can be respectively and accurately controlled, the aim of zonal temperature adjustment is achieved, the temperature of glass liquid entering the float forming device from the float main passage 3 and the temperature of glass liquid entering the rolling forming device from the transverse passage 4 and the rolling branch passage 5 can be respectively and accurately controlled, the production of float glass products and rolled glass products in one glass melting furnace can be realized, and the yield of the glass products can be ensured.
In the third step, the float forming process comprises the following steps: the glass liquid with temperature fine adjustment in the float main passage 3 enters a float runner 31, the flow rate and the flow velocity are controlled by a runner adjusting flashboard, and then the glass liquid is sent into a tin bath chamber of a float forming device to be formed into a float glass product through a float process. The calendaring molding process comprises the following steps: the glass liquid with the temperature finely regulated in the rolling branch passage 5 passes through the rolling overflow port 51 to obtain glass liquid with the surface flowing uniformly longitudinally, and then the glass liquid is sent into a rolling chamber of a rolling forming device to be formed into a rolled glass product through a rolling process.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (10)
1. The utility model provides a glass melting furnace, its characterized in that includes melting portion (1), neck (2), float main passageway (3), horizontal passageway (4), calendering branch road (5) and upper portion space division device (6), the rear end of melting portion (1) is passed through neck (2) with the front end of float main passageway (3) is linked together, the rear end of float main passageway (3) is equipped with float runner (31) of connecting float forming device, the front end of calendering branch road (5) is linked together with float main passageway (3) through horizontal passageway (4), the rear end of calendering branch road (5) is equipped with the calendering overflow mouth (51) of connecting the calendering forming device, horizontal passageway (4) with the upper portion of the junction inside of float main passageway (3) all is equipped with upper portion space division device (6), main passageway (3), horizontal passageway (4) and the upper portion of the junction inside of calendering branch road (5) all are equipped with temperature regulating device.
2. Glass melting furnace according to claim 1, characterized in that the upper part of the inside of the neck (2) is provided with the upper space divider (6).
3. Glass melting furnace according to claim 1 or 2, characterized in that the upper space divider (6) is any one of a rider arch, a fish maw arch, a flat arch, a suspended flat arch and a suspended wall.
4. Glass melting furnace according to claim 1, characterized in that the centre line of the float main channel (3) is collinear with the centre line of the melting section (1) or the centre line of the float main channel (3) is parallel with the centre line of the melting section (1) and spaced between 1500mm and 2000mm.
5. Glass melting furnace according to claim 1, characterized in that one lateral surface of the front end of the float main passage (3) is connected with one lateral passage (4), or one lateral passage (4) is connected with two lateral surfaces of the front end of the float main passage (3); each transverse passage (4) is connected with one rolling branch passage (5).
6. Glass melting furnace according to claim 1, characterized in that the melting section (1) comprises a melting tank (11), the front and rear of the melting tank (11) being provided with a melting zone (11 a) and a fining zone (11 b), respectively, and that a bottom bubbling device (12) is provided in the melting tank (11) on the bottom of the melting zone (11 a).
7. Glass melting furnace according to claim 6, characterized in that the bottom of the melting tank (11) is a stepped structure (11 c) rising gradually from front to back, the height of each step of the stepped structure (11 c) being 50-150 mm.
8. A method of producing glass, characterized by using the glass melting furnace according to any one of claims 1 to 7, comprising the following steps in order:
step one, preparing a glass batch;
step two, the glass batch is put into the melting part (1), molten and clarified by the melting part (1) to form glass liquid, and the glass liquid enters the float main passage (3) through the neck (2);
step three, a part of the glass liquid entering the float main passage (3) continuously flows through the float main passage (3) and enters the float forming device through the float runner (31) to form float glass, and the other part of the glass liquid flows into the calendaring branch passage (5) through the transverse passage (4) and enters the calendaring forming device through the calendaring overflow port (51) to form calendared glass;
in the second step and the third step, the temperature of the glass liquid flowing through the float main passage (3), the transverse passage (4) and the rolling branch passage (5) is respectively adjusted by temperature adjusting devices.
9. The method according to claim 8, wherein in the first step, the glass melted by the glass batch comprises the following chemical components in percentage by weight: siO (SiO) 2 70％～75％；Al 2 O 3 0.1％～1.0％；CaO 2 6％～10％；MgO 2 2％～4.5％；(Na 2 O+K 2 O)10％～15％；Fe 2 O 3 0.01％～1.6％；SO 3 0.2％。
10. The glass production method according to claim 8, wherein in the second step, the melting temperature of the melting part (1) is 1575 ℃ to 1590 ℃, the fining temperature of the melting part (1) is more than 1440 ℃, and the glass liquid temperature at the front part of the float main passage (3) is adjusted to 1250±50 ℃; in the third step, the temperature of the glass liquid at the float runner (31) is regulated to 1100+/-50 ℃, the temperature of the glass liquid at the tail end of the transverse passage (4) is regulated to 1150+/-50 ℃, and the temperature of the glass liquid at the calendaring overflow port (51) is regulated to 1050+/-50 ℃.
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| CN202310281977.4A CN116177850A (en) | 2023-03-21 | 2023-03-21 | Glass melting furnace and glass production method |
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| CN202310281977.4A CN116177850A (en) | 2023-03-21 | 2023-03-21 | Glass melting furnace and glass production method |
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|---|---|---|---|---|
| CN201301274Y (en) * | 2008-08-30 | 2009-09-02 | 中国建材国际工程有限公司 | Multiline melting furnace for producing ultra-white glass or solar battery patterned glass |
| CN206308246U (en) * | 2016-11-28 | 2017-07-07 | 中国南玻集团股份有限公司 | Melting furnaces |
| CN113582508A (en) * | 2021-08-04 | 2021-11-02 | 宁波旗滨光伏科技有限公司 | Glass melting furnace and production line |
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2023
- 2023-03-21 CN CN202310281977.4A patent/CN116177850A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201301274Y (en) * | 2008-08-30 | 2009-09-02 | 中国建材国际工程有限公司 | Multiline melting furnace for producing ultra-white glass or solar battery patterned glass |
| CN206308246U (en) * | 2016-11-28 | 2017-07-07 | 中国南玻集团股份有限公司 | Melting furnaces |
| CN113582508A (en) * | 2021-08-04 | 2021-11-02 | 宁波旗滨光伏科技有限公司 | Glass melting furnace and production line |
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