CN111875234B - Molten glass heating device - Google Patents
Molten glass heating device Download PDFInfo
- Publication number
- CN111875234B CN111875234B CN202010915656.1A CN202010915656A CN111875234B CN 111875234 B CN111875234 B CN 111875234B CN 202010915656 A CN202010915656 A CN 202010915656A CN 111875234 B CN111875234 B CN 111875234B
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- China
- Prior art keywords
- platinum channel
- arc
- molten glass
- heating device
- platinum
- Prior art date
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- 239000006060 molten glass Substances 0.000 title claims abstract description 34
- 238000010438 heat treatment Methods 0.000 title claims abstract description 32
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 222
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 111
- 238000001816 cooling Methods 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 2
- 239000010970 precious metal Substances 0.000 claims 1
- 229910000923 precious metal alloy Inorganic materials 0.000 claims 1
- 239000011521 glass Substances 0.000 abstract description 26
- 239000007788 liquid Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 8
- 238000003756 stirring Methods 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000000265 homogenisation Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 12
- 238000005485 electric heating Methods 0.000 description 10
- 239000003351 stiffener Substances 0.000 description 6
- 238000005352 clarification Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910000510 noble metal Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000005388 borosilicate glass Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- DEPUMLCRMAUJIS-UHFFFAOYSA-N dicalcium;disodium;dioxido(oxo)silane Chemical compound [Na+].[Na+].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O DEPUMLCRMAUJIS-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/225—Refining
-
- 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
- C03B5/18—Stirring devices; Homogenisation
- C03B5/183—Stirring devices; Homogenisation using thermal means, e.g. for creating convection currents
- C03B5/185—Electric means
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
本发明提供了一种熔融玻璃的加热装置，包括铂金通道以及套设于所铂金通道的外壁面并与铂金通道电接触的法兰，法兰包括内环及与内环周接的外环，并通过设置铂金通道的第一圆弧的径向厚度小于第二圆弧的径向厚度，以及内环的第一弧段的轴向厚度小于第二弧段的轴向厚度，以及外环在竖直方向上相对于铂金通道向上偏心设置，以使铂金通道的底部通过更多的电流，产生更多的热量，铂金通道底部的玻璃液被强烈加热后，产生了向上的玻璃液流，该玻璃液流到达铂金通道顶部后分别向左、向下及向右、向下流动，实现了“静态搅拌”的功能，玻璃液温度和成分的均匀性得以改善，从而使玻璃液达到均质均热的效果。
The present invention provides a heating device for molten glass, comprising a platinum channel and a flange sleeved on the outer wall surface of the platinum channel and in electrical contact with the platinum channel, the flange comprising an inner ring and an outer ring circumferentially connected to the inner ring, and by setting the radial thickness of the first arc of the platinum channel to be smaller than the radial thickness of the second arc, and the axial thickness of the first arc segment of the inner ring to be smaller than the axial thickness of the second arc segment, and the outer ring being eccentrically arranged upward relative to the platinum channel in the vertical direction, more current passes through the bottom of the platinum channel to generate more heat, and after the glass liquid at the bottom of the platinum channel is strongly heated, an upward glass liquid flow is generated, and after the glass liquid flow reaches the top of the platinum channel, it flows leftward, downward, rightward, and downward, respectively, thereby realizing the function of "static stirring", and the uniformity of the temperature and composition of the glass liquid is improved, so that the glass liquid achieves the effect of homogenization and uniform heating.
Description
Technical Field
The invention relates to the field of glass manufacturing, in particular to a heating device for molten glass.
Background
Compared with common sodium-calcium silicate glass, the borosilicate glass has greatly improved mechanical property, thermal stability, water resistance, alkali resistance, acid resistance and the like, so that the borosilicate glass is widely applied to various industries such as aerospace, military, chemical industry, medicine, fire protection, household appliances and the like, and has good application value and social benefit.
Wherein, during the production process of the neutral medicinal borosilicate glass, the molten glass is conveyed into a forming device through a platinum channel comprising various process sections. To ensure that the molten glass is operating at the temperature profile of the process requirements, each section of the platinum channel may be heated, directly or indirectly, by applying an electrical current in those sections, thereby heating the molten glass therein, the process sections of the platinum channel including, but not limited to, a fining section, a stirring section, a cooling section, and the like.
However, the molten glass in the platinum channel is not uniform in composition in the up-down direction due to the influence of gravity. Meanwhile, in the existing molten glass heating device, current flows through the upper wall part of the platinum channel more easily, the current flowing through the upper wall part of the platinum channel is larger than the current flowing through the lower wall part of the platinum channel, and under the same other conditions, the heat generated by the upper wall of the platinum channel is larger than the heat generated by the lower wall of the platinum channel. This causes the molten glass to be heated unevenly in the up-down direction, and further causes the composition of the molten glass to be uneven in the up-down direction.
Disclosure of Invention
The invention mainly aims to provide a heating device for molten glass, which aims to achieve the effect of homogenizing molten glass in a platinum channel at the same temperature.
To achieve the above object, the present invention provides a heating apparatus for molten glass, having a symmetry line in a vertical direction, comprising:
The radial section of the platinum channel comprises a first arc positioned above and a second arc positioned below, the first arc and the second arc are enclosed to form the radial section of the platinum channel, the radial thickness of the second arc is larger than that of the first arc, and the first arc and the second arc are symmetrically arranged along the symmetrical line;
the platinum channel comprises a platinum channel, a flange, an inner ring and an outer ring, wherein the platinum channel is sleeved with the flange, the platinum channel is electrically contacted with the flange, the flange comprises an inner ring and an outer ring which is connected with the inner ring in a surrounding mode, the inner ring comprises a first arc section positioned above and a second arc section positioned below, the first arc section and the second arc section are surrounded to form the inner ring, the first arc section and the second arc section are symmetrically arranged along the symmetrical line, the axial thickness of the first arc section is smaller than that of the second arc section, the inner ring and the platinum channel are concentrically arranged, and the outer ring is eccentrically arranged upwards relative to the platinum channel in the vertical direction.
Optionally, the radial cross-sectional area of the second arc is 30% -60% of the radial cross-sectional area of the platinum channel.
Optionally, the axial thickness of the second arc section is 1.2-3 times of the axial thickness of the first arc section.
Optionally, the offset of the center of the outer ring upwards relative to the center of the platinum channel is 10% -60% of the diameter of the platinum channel.
Optionally, choke holes are formed in the outer ring, the choke holes are symmetrically arranged along the symmetry line, and the choke holes are located above the inner ring.
Optionally, the choke hole has an elongated shape, a meniscus shape or a dovetail shape in a radial cross section.
Optionally, the heating device of molten glass further comprises a cooling pipe, the cooling pipe is circumferentially arranged on the outer ring, and cooling medium is filled in the cooling pipe.
Optionally, the heating device for molten glass further includes a plurality of reinforcing members, and the plurality of reinforcing members are disposed on an inner side wall surface of the top of the platinum channel at intervals along the length direction of the platinum channel.
Optionally, the shape of the radial cross section of the platinum channel is circular, rectangular, triangular, trapezoidal, parallelogram, oval or racetrack.
Optionally, the inner ring is made of platinum noble metal or platinum noble metal alloy, and the outer ring is made of nickel with purity of at least 99 wt%.
According to the invention, through special design, more current is passed through the bottom of the platinum channel to generate more heat, and after the glass liquid at the bottom of the platinum channel is strongly heated, upward glass liquid flow is generated, and the glass liquid flow respectively flows leftwards, downwards and rightwards and downwards after reaching the top of the platinum channel, so that the function of static stirring is realized, the uniformity of the temperature and components of the glass liquid is improved, and the effect of homogenizing and soaking the glass liquid is achieved.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or examples of the present invention, the drawings that are required to be used in the embodiments or examples of the present invention will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained from those shown in the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic front view of a heating device for molten glass when the radial cross section of a platinum channel is circular in an embodiment of the invention;
FIG. 2 is a schematic view of the cross-sectional structure of FIG. 1 along the axial direction;
fig. 3 to 5 are schematic diagrams of three embodiments of a second arc when the radial section of the platinum channel is circular;
FIG. 6 is a schematic front view of a heating device for molten glass in which the radial cross section of a platinum channel is racetrack-shaped according to an embodiment of the present invention;
fig. 7 to 9 are schematic diagrams of three embodiments of a second arc when the radial section of the platinum channel is racetrack-shaped;
FIG. 10 is a schematic view illustrating the installation of a platinum channel stiffener according to an embodiment of the present invention;
fig. 11 is a schematic diagram illustrating connection between two adjacent electric heating flanges and a power supply member according to an embodiment of the present invention.
Reference numerals illustrate:
| 10 | platinum channel | 211 | A first arc section |
| 11 | First circular arc | 212 | Second arc section |
| 12 | Second circular arc | 22 | Outer ring |
| 121 | A first wall portion | 23 | Choke hole |
| 122 | A second wall portion | 24 | Electrode |
| 123 | A third wall portion | 30 | Cooling pipe |
| 20 | Flange | 40 | Reinforcing member |
| 21 | Inner ring | 50 | Power supply piece |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present invention) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
As used herein, the term "radial cross section" refers to a cross section that is formed when a platinum channel is cut by a plane perpendicular to the longitudinal axis of the platinum channel, unless otherwise specified.
The invention provides a heating device for molten glass.
In an embodiment, as shown in fig. 1 to 5, the heating device for molten glass includes a platinum channel 10 and a flange 20, wherein the heating device has a symmetry line Y along a vertical direction, a wall thickness of the platinum channel 10 varies in a circumferential direction, and the flange 20 is sleeved on an outer wall surface of the platinum channel 10 and is in electrical contact with the platinum channel 10. An alternating current is connected to the flange 20, the flange 20 conducts an electric current to the platinum channel 10, and the platinum channel 10 serves as an electric heating load for electric heating. The flange 20 includes an inner ring 21 and an outer ring 22 circumferentially connected to the inner ring 21, and the inner ring 21 is in electrical contact with the outer wall surface of the platinum channel 10. The outer ring 22 serves to distribute the current and the inner ring 21 serves to conduct the current to the platinum channel 10.
The radial section of the platinum channel 10 comprises a first arc 11 positioned above and a second arc 12 positioned below, the first arc 11 and the second arc 12 are enclosed to form the radial section of the platinum channel 10, the radial thickness of the second arc 12 is larger than that of the first arc 11, the first arc 11 and the second arc 12 are symmetrically arranged along the symmetry line Y, the inner ring 21 comprises a first arc section 211 positioned above and a second arc section 212 positioned below, the first arc section 211 and the second arc section 212 are enclosed to form the inner ring 21, the first arc section 211 and the second arc section 212 are symmetrically arranged along the symmetry line Y, the axial thickness of the first arc section 211 is smaller than that of the second arc section 212, the inner ring 21 and the platinum channel 10 are concentrically arranged, and the outer ring 22 is eccentrically arranged relative to the inner ring 21 in the vertical direction.
According to the calculation formula of the conductor resistance:
R=ρ×L/S;
Where ρ is the resistivity of the conductor, L is the length of the conductor, and S is the cross-sectional area of the conductor.
The radial thickness of the second arc 12 is larger than the radial thickness of the first arc 11, i.e. the conductive cross-sectional area of the second arc 12 is larger than the conductive cross-sectional area of the first arc 11. According to the calculation formula of the conductor resistance, under the condition that other conditions are the same, the resistance of the second arc 12 is made smaller than the resistance of the first arc 11, i.e. the thicker second arc 12 has smaller resistance than the first arc 11. The first arc 11 and the second arc 12 are arranged in parallel, and if a certain voltage is applied, the smaller the resistance is, the larger the current is, according to ohm's law, on the premise that the voltage is certain, so that the current flowing through the second arc 12 is larger than the current flowing through the first arc 11. According to w=ui, under a certain voltage, the electric heating power generated by the second arc 12 is greater than the electric heating power generated by the first arc 11, that is, the electric heating power of the bottom of the platinum channel 10 is greater than the electric heating power of the top of the platinum channel 10.
Similarly, the axial thickness W1 of the first arc segment 211 is smaller than the axial thickness W2 of the second arc segment 212, i.e. the conductive cross-sectional area of the first arc segment 211 is smaller than the conductive cross-sectional area of the second arc segment 212. According to the calculation formula of the conductor resistance, the resistance of the first arc segment 211 is larger than the resistance of the second arc segment 212 under the condition that other conditions are the same. Because the first arc section 211 and the second arc section 212 are arranged in parallel, if a certain voltage is applied, the smaller the resistance is, the larger the current is under the premise of a certain voltage according to ohm's law, therefore, the current flowing through the second arc section 212 is larger than the current flowing through the first arc section 211, the second arc section 212 is in electrical contact with the second arc 12, and the second arc section 212 guides a larger current into the second arc 12, so that the electric heating power of the bottom of the platinum channel 10 is further increased.
Since the outer ring 22 is disposed eccentrically upward in the vertical direction with respect to the platinum channel 10. The radial width H1 of the upper portion of the outer ring 22 is greater than the radial width H2 of the lower portion of the outer ring 22. The upper part of the outer ring 22 has the same resistivity ρ and conductive cross-sectional area S as the lower part of the outer ring 22, and the upper part of the outer ring 22 has a larger resistance R according to a conductor resistance calculation formula because the radial width H1 of the upper part of the outer ring 22 is larger than the radial width H2 of the lower part of the outer ring 22, resulting in a longer length L of the upper part of the outer ring 22. According to ohm's theorem, the upper part of the outer ring 22 has a larger resistance R, and under the same voltage U, a smaller current is introduced into the top of the platinum channel 10, and a larger current is introduced into the bottom of the platinum channel 10, so as to further increase the electric heating power of the bottom of the platinum channel 10.
According to the invention, through a special design, more current passes through the bottom of the platinum channel 10 to generate more heat, after the glass liquid at the bottom of the platinum channel 10 is strongly heated, upward glass liquid flow is generated, and the glass liquid flows leftwards, downwards and rightwards respectively after reaching the top of the platinum channel 10 (as shown in fig. 5, wherein an arrow in the drawing indicates the flowing direction of the glass liquid), so that the function of static stirring is realized, the uniformity of the temperature and components of the glass liquid is improved, and the effect of homogenizing and soaking the glass liquid is achieved.
Meanwhile, the invention greatly improves the temperature and the uniformity of components of the glass liquid flowing in the platinum channel 10 on the premise of ensuring the service life of the platinum channel 10. For the platinum channel 10 of the clarification section, the invention effectively increases the temperature of the glass liquid at the position of the clarification section close to the bottom center, and simultaneously accelerates the upward floating of gaseous substances contained in the glass liquid and the discharge of the gaseous substances from the glass liquid, thereby greatly improving the clarification effect of the clarification section on the glass liquid in the clarification section. The temperature difference between the temperature of the glass liquid at the center of the outlet of the platinum channel 10 and the temperature of the glass liquid at the liquid level of the outlet of the platinum channel 10 is less than or equal to 5 ℃.
By "static agitation" is meant movement of fluid within the platinum channel 10 without moving parts. The reason for the generation of static stirring is different from the traditional stirring by means of a moving part, namely that uneven temperature and non-uniformity phenomenon exist in the fluid, so that the density of the fluid is different, and the fluid with different densities is heated to generate convection.
In an embodiment of the present invention, the radial cross-sectional area of the second arc 12 is 30% -60% of the radial cross-sectional area of the platinum channel 10, so that sufficient heat is provided at the second arc 12. When the radial cross-sectional area of the second arc 12 is too small, the second arc 12 is not thickened significantly, and the current increase of the second arc 12 is not sufficiently significant, and when the radial cross-sectional area of the second arc 12 is too large, for example, more than 60% of the radial cross-sectional area of the platinum channel 10, the cost increases.
The specific form of the second circular arc 12 is not limited, as long as the radial thickness of the second circular arc 12 is larger than the radial thickness of the first circular arc 11, and the second circular arc 12 is symmetrically arranged along the symmetry line.
Specifically, in an embodiment of the present invention, the second circular arc 12 may be uniformly thickened, as shown in fig. 3 and 4 and 7, and the manufacturing process of the uniformly thickened is simple. In other embodiments, the second arc may be unevenly thickened. As shown in fig. 5 and 8, the second circular arc 12 includes a continuous first wall portion 121 and a second wall portion 122, the first wall portion 121 is located at the center of the second circular arc 12, the second wall portion 122 includes two, two second wall portions 122 are located at two sides of the first wall portion 121, respectively, and the radial thickness of the first wall portion 121 is greater than the radial thickness of the second wall portion 122, and the radial thickness of the second wall portion 122 is greater than the radial thickness of the first circular arc 11.
As an alternative embodiment, as shown in fig. 9, the second arc 12 further includes a third wall portion 123, where the third wall portion 123 is disposed between the first wall portion 121 and the second wall portion 122, and a radial thickness of the third wall portion 123 is smaller than a radial thickness of the first wall portion 121, and a radial thickness of the third wall portion 123 is larger than a radial thickness of the second wall portion 122. That is, the third wall portion 123 is a transition between the first wall portion 121 and the second wall portion 122, and has a radial thickness between the radial thickness of the first wall portion 121 and the radial thickness of the second wall portion 122, so as to avoid a direct decrease from the thicker first wall portion 121 to the thinner second wall portion 122, and prevent the temperature of the second arc 12 from decreasing to both sides.
In one embodiment of the present invention, as shown in fig. 1-5, the shape of the radial cross section of the platinum channel is circular, and in another embodiment of the present invention, the shape of the radial cross section of the platinum channel is racetrack-shaped, as shown in fig. 6-9, formed by splicing two parallel straight lines and two semi-circles. The circular shape and the runway shape are convenient for the glass liquid to flow because the side walls of the circular shape and the runway shape are continuous arcs. In other embodiments, the radial cross-sectional shape of the platinum channel may be other shapes, such as rectangular, triangular, trapezoidal, parallelogram, or oval, but not limited thereto.
Optionally, the inner ring 21 is made of platinum noble metal (such as pure platinum) or platinum noble metal alloy (such as 10wt% of platinum-rhodium or 20wt% of platinum-rhodium), and the outer ring 22 is made of nickel with a purity of at least 99 wt%. Of course, in other embodiments, the inner ring 21 and the outer ring 22 may be made of other materials, which is not limited herein.
In an embodiment of the present invention, as shown in fig. 2, the axial thickness W2 of the second arc segment 212 is 1.2-3 times the axial thickness W1 of the first arc segment 211, so that the second arc segment 212 can divide a large enough current, and then the current is led into the second arc 12, i.e. the bottom of the platinum channel 10. The axial thickness W2 of the second arc segment 212 is smaller than 1.2 times of the axial thickness W1 of the first arc segment 211, which may have the effect of heating the bottom (i.e., the second arc 12) of the platinum channel 10 less significantly, and the axial thickness W2 of the second arc segment 212 is larger than 3 times of the axial thickness W1 of the first arc segment 211, which may have the effect of overheating the bottom (i.e., the second arc 12) of the platinum channel 10, which may also have the effect of increasing the manufacturing cost.
In an embodiment of the present invention, as shown in fig. 1 and 6, the offset of the center of the outer ring 22 relative to the center of the platinum channel 10 is 10% -60% of the diameter of the platinum channel 10, so that more current is obtained below the outer ring 22. The upward offset of the center of the outer ring 22 relative to the center of the platinum channel 10 is more than 60% of the diameter of the platinum channel 10, which may cause the bottom of the platinum channel 10 (i.e. the second arc 12) to overheat, while the upward offset of the center of the outer ring 22 relative to the center of the platinum channel 10 is less than 10% of the diameter of the platinum channel 10, which may cause the bottom of the platinum channel 10 (i.e. the second arc 12) to heat up less than obvious.
In an embodiment of the present invention, as shown in fig. 1 and 6, the outer ring 22 is provided with choke holes 23, the choke holes 23 are symmetrically arranged along the symmetry line Y, and the choke holes 23 are located above the inner ring 21. A choke 23 is provided above the outer ring 22 for blocking the current directly transferred to the first arc segment 211 along a central position above the outer ring 22. That is, in this embodiment, by providing the choke hole 23, the alternating current passing over the outer ring 22 to the first arc section 211 bypasses, that is, increases the current flowing path, so as to indirectly increase the length of the conductor, that is, the conductor resistance R over the outer ring 22 bypassing from the left and right sides of the choke hole 23 according to the conductor resistance calculation formula (described above), has a length of the current-carrying conductor greater than that when the choke hole 23 is not added, so that the resistance value over the outer ring 22 increases. According to the ohm's theorem, the resistance of the upper portion of the outer ring 22 is greater than the resistance of the lower portion of the outer ring 22, so that the current distributed by the second arc segment 212 is greater than the current distributed by the first arc segment 211, and more current is introduced to the second arc 12 by the second arc segment 212, so that more electric heating power is obtained at the second arc 12, and the temperature at the second arc 12 is increased.
Alternatively, the choke hole 23 has a shape of an elongated shape, a meniscus shape or a dovetail shape in a radial cross section. Of course, in other embodiments, the choke hole 23 may be provided in other shapes, which are not limited herein.
Further, with continued reference to fig. 1 and 6, the flange 20 also includes an electrode 24 in electrical contact with the flange 20 and functions to connect the flange 20 to a power source via a cable, bus bar, or other electrical conductor.
Further, as shown in fig. 1 and 2, the heating apparatus for molten glass further includes a cooling pipe 30, and the cooling pipe 3 is disposed around the outside of the outer ring 22 to cool the flange 20, thereby preventing the flange 20 from being worn due to the high temperature of the flange 20. The cooling pipe 30 is filled with cooling water or compressed air. Or other cooling substances may be introduced into the cooling pipe 30, which is not limited herein.
Alternatively, the cooling tube 30 is made of copper or nickel. Alternatively, the cooling tube 30 may be made of other materials, which are not limited herein.
Further, as shown in fig. 10, the heating device for molten glass further includes a plurality of reinforcing members 40, and the plurality of reinforcing members 40 are disposed on the inner side wall surface of the top of the platinum channel 10 at intervals along the length direction of the platinum channel 10, so as to prevent the tube wall of the platinum channel 10 from collapsing.
Optionally, the stiffener 40 is a stiffener, the width of the stiffener is 5 mm-20 mm, the thickness of the stiffener is 0.5 mm-1.5 mm, and the spacing distance of the stiffener is 200 mm-500 mm.
Specifically, as shown in fig. 11, the flange 20 includes a plurality of heating devices for molten glass, and further includes a power supply member 50, where two ends of the power supply member 50 are respectively connected to the current access terminals 24 of two adjacent flanges 20, so as to heat the platinum channel 10 (such as a container of a fining section) between the two adjacent flanges 20. Namely, the power supply piece 50, the two adjacent flanges 20 and the platinum channel 10 form a heating circuit.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent modifications made by the present description and accompanying drawings, or direct/indirect application in other relevant technical fields are included in the scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915656.1A CN111875234B (en) | 2020-09-03 | 2020-09-03 | Molten glass heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010915656.1A CN111875234B (en) | 2020-09-03 | 2020-09-03 | Molten glass heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111875234A CN111875234A (en) | 2020-11-03 |
| CN111875234B true CN111875234B (en) | 2025-04-29 |
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| CN202010915656.1A Active CN111875234B (en) | 2020-09-03 | 2020-09-03 | Molten glass heating device |
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| JP5730259B2 (en) * | 2012-09-27 | 2015-06-03 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass manufacturing apparatus and glass manufacturing method |
| JP6054443B2 (en) * | 2015-03-05 | 2016-12-27 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass conduit and method for producing glass plate |
| EP3274304B1 (en) * | 2015-03-23 | 2021-05-05 | Corning Incorporated | Apparatus and method for heating a metallic vessel |
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| CN102960053A (en) * | 2010-07-07 | 2013-03-06 | 法国圣戈班玻璃厂 | Composite pane having an electrically heatable coating |
| CN105829253A (en) * | 2013-10-18 | 2016-08-03 | 康宁股份有限公司 | Apparatus and method for making glass |
| CN212315912U (en) * | 2020-09-03 | 2021-01-08 | 湖南旗滨医药材料科技有限公司 | Heating device for molten glass |
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