Porous partition plate structure for improving temperature difference between inside and outside of molten glass in optical glass platinum channel

Abstract

The invention discloses a porous partition plate structure for improving temperature difference inside and outside glass liquid in an optical glass platinum channel, which comprises a platinum material channel, and two ends of the platinum material channel are provided with ports for the glass liquid to enter and exit; the isolation pieces are arranged in the platinum material channel in a linear array mode; and the operation hole groove is formed in the separator and is used for circulation of molten glass, and relates to the technical field of optical glass manufacturing. Through the arrangement of the multiple groups of circulating groove holes in the partition plate, the fluid characteristics of molten glass in the non-flow direction can be improved, namely, corresponding temperature and speed differences are reduced, and the multiple groups of circulating groove holes in the partition plate have a redistribution effect on the molten glass during circulation, so that the internal and external temperature difference of the molten glass can be further reduced; the clarifying and homogenizing effects of the clarifying section are integrally improved, the overall platinum structural strength of the section can be improved due to the arrangement of the partition plates in the flow channel, and particularly, the sinking deformation resisting capacity of the pipe body is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of optical glass manufacturing, in particular to a porous partition structure in a platinum channel of an optical glass to improve the temperature difference between the inside and outside of a glass liquid. Background Art

[0002] In the process equipment of glass manufacturing fields such as optics, electronics, and pharmaceutical glass, the platinum channel, as the core thermal equipment, plays an important role in "connecting the past and the future" for the "three major transfers" of heat, mass, and momentum of the glass liquid. It is specifically used in the intermediate stage of the glass melting process. The essence of the transfer of glass liquid in the platinum channel is the interaction of heat transfer, flow, diffusion, etc. caused by the chemical potential difference between adjacent micro-element fluids of silicate and its complex salt melt in the platinum channel. As the most important influencing factor, temperature control runs through the entire process of glass melting and even annealing. For the melting and clarification of glass, a reasonable temperature system is a necessary prerequisite. Generally speaking, the melting and clarification process of glass is to achieve sufficient diffusion and transfer between the micro-elements in the glass liquid fluid by means of heat transfer. For heat transfer in the glass melting and clarification stage, the total input heating amount is much greater than its heat dissipation. However, due to multiple factors such as the distance of heat source action, flow channel structure, and insulation effect, it is impossible to avoid the loss of energy in the input-end system such as platinum and even glass liquid. This loss is reflected to a certain extent in the difference in the internal temperature of the glass fluid and the thermal efficiency of the input-end system.

[0003] For the commonly used indirect heating clarification channel structure in optical glass, the heat mainly comes from the heating electrode, which heats the heated cavity into a high-temperature cavity in the form of thermal radiation, and then indirectly transfers the heat to the platinum system and even the glass melt. However, due to the highest central radiation temperature of the heating electrode, and the inevitable heat exchange between the high-temperature cavity in the radiation area inside the insulation and the cold end outside, there is a large temperature difference between the hot and cold interfaces (i.e., inside and outside the insulation layer), so there is a certain temperature gradient between the center of the heated cavity and the insulation layer along the two sides, which is reflected in the fact that the closer to the center position, the higher the spatial temperature. Therefore, it also causes a similar problem that the glass melt has a large temperature difference between the inside and outside during the heating process, and then the fluid properties of the inner and outer parts of the glass melt are different. In addition, the rigid wall surface inside the platinum channel tube causes the complete wetting of the glass melt, which causes it to be subject to resistance along the tube wall during the flow process, resulting in the temperature and flow rate of the internal glass liquid microfluid being higher than the microfluid near the platinum channel tube wall. This difference has a particular impact on the clarification and homogenization of the glass melt. The edge with a lower temperature has a higher viscosity and a worse transfer effect of the molten glass, which in turn affects the clarification and homogenization of the glass. Summary of the invention

[0004] The object of the present invention is to provide a porous partition structure in a platinum channel of an optical glass for improving the temperature difference between the inside and outside of the glass liquid, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a porous partition structure for improving the temperature difference of glass liquid in a platinum channel, comprising a platinum channel, both ends of which are provided with openings for glass liquid to enter and exit; an isolating piece, the outer side of which is provided with a contact surface adapted to the clarification section of the platinum channel, and the width or height parameter of the contact surface is positively correlated with the inner width or inner height; and an operating hole groove, the operating hole groove is through-opened on the isolating piece, the operating hole groove comprises a central hole and a strip hole, a plurality of the strip holes are distributed in a circular array and are arranged concentrically with the circular hole.

[0006] As a further solution of the present invention: the separator includes a porous partition, the center hole includes a flow center hole and is arranged at the center of the porous partition, the strip hole includes a first flow hole slot, a second flow hole slot, a third flow hole slot and a fourth flow hole slot array, the strip holes are centered on the center hole and are distributed in a circular array in sequence according to the size of the sequence number at the circumference of the flow center hole, wherein the calculation formula of the strip hole diameter is:

[0007]

[0008] Among them, i is the serial number of the first flow hole slot, the second flow hole slot, the third flow hole slot and the fourth flow hole slot array, and n is 3.

[0009] As a further solution of the present invention: the central circulation hole is located at the exact center of the porous partition plate, and the structure of the central circulation hole is a circular hole with a diameter of d1 = W / 50 to W / 200.

[0010] As a further solution of the present invention: the operating holes and grooves also include an edge flow hole array, the outer side of the porous partition is provided with a contact partition wall surface adapted to the platinum channel clarification section, and the edge flow hole array is opened at the outer end of the partition wall surface.

[0011] As a further solution of the present invention: the structure of the edge flow hole array is formed by combining a long strip hole array and an arc-shaped long strip hole array.

[0012] As a further solution of the present invention: the edge flow hole array is evenly distributed at the connection between the porous partition and the platinum channel clarification section, and the distribution number of the edge flow hole array follows the principle that the arrangement number in width and height is ≥2.

[0013] As a further solution of the present invention: the fourth flow hole array is composed of two groups of symmetrically distributed arc-shaped long holes, the fourth flow hole array is mirror-symmetrically distributed along the longitudinal center axis of the porous partition, and the distance between the fourth flow hole array and the flow center hole is 0.6187W.

[0014] As a further solution of the present invention: the fourth flow hole array is arranged in a mirror-symmetrical manner along the longitudinal center axis of the porous partition.

[0015] As a further solution of the present invention: the diameter of the central flow hole is d1, the slot width of the first flow hole slot is d2, the slot width of the second flow hole slot is d3, the slot width of the third flow hole slot is d4, the slot width of the fourth flow hole slot array is d5, the slot width of the edge flow hole slot array is d6, and d6:d5:d4:d3:d2:d1≈1.3 4 :1.3 4 :1.3 3 :1.3 2 :1.3:1.

[0016] As a further solution of the present invention: a cavity for accommodating the isolation member is opened inside the clarification section of the platinum channel, and the porous partition structure is arranged in the cavity through the partition wall and is arranged in a linear array.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The arrangement of multiple groups of flow slots in the partition of the present application can improve the fluid characteristics of the glass liquid in the non-flow direction, that is, reduce the corresponding temperature and velocity differences, and the multiple groups of flow slots in the partition have a redistribution effect on the glass liquid during circulation, which can further reduce the temperature difference between the inside and outside of the glass liquid, and improve the clarification and homogenization effect of the clarification section as a whole.

[0019] 2. The provision of the internal baffle of the flow channel of the present application can increase the overall platinum structural strength of the section, especially enhance the ability of the tube body to resist "sinking" deformation.

[0020] 3. The present application has a simple structure and low cost, and multiple groups of partitions can be flexibly set up. It is also suitable for glass production lines containing platinum channels other than optical glass production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an assembly diagram of the platinum forehearth clarification section and the porous partition in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a porous partition in an embodiment of the present invention;

[0023] Figure 3 This is one of the structural diagrams of the assembly of the platinum channel and the partition in the embodiment of the present invention;

[0024] Figure 4 This is the second structural diagram of the assembly of the platinum channel and the partition in the embodiment of the present invention;

[0025] Figure 5 This is a transverse temperature distribution diagram of a solution without a baffle in an embodiment of the present invention;

[0026] Figure 6 It is a transverse temperature distribution diagram of the baffle solution in the embodiment of the present invention;

[0027] In the figure: 1. Platinum channel clarification section; 2. Porous partition; 3. Flow center hole; 4. First flow hole slot; 5. Second flow hole slot; 6. Third flow hole slot; 7. Fourth flow hole slot array; 8. Edge flow hole slot array; 9. Partition wall. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] In an embodiment of the present invention, a porous partition structure for improving the temperature difference between the inside and outside of the glass liquid in a platinum channel of an optical glass is provided. The purpose of the porous partition structure is to be applied inside the platinum channel to improve the fluid properties of the glass liquid in a non-flow direction. Both ends of the platinum channel are provided with openings for the glass liquid to enter and exit. The platinum channel includes a platinum channel clarification section 1 and ports arranged on both sides of the platinum channel clarification section 1. A cavity for accommodating an isolating member is provided inside the platinum channel clarification section 1. The operating hole groove is provided inside the isolating member and is used for the glass liquid to flow. The operating hole groove is through-opened. It is arranged on the porous partition plate 2 and includes a central hole and strip holes arranged concentrically, wherein the length of the central hole d1=W / 50~W / 200 (W is the inner width of the clarification section), and a plurality of the strip holes are arranged in a circumferential array, wherein the central hole includes a flow central hole 3, and the strip holes include a first flow hole slot 4, a second flow hole slot 5, a third flow hole slot 6 and a fourth flow hole slot array 7 which are arranged through the porous partition plate 2, and the first flow hole slot 4, the second flow hole slot 5, the third flow hole slot 6 and the fourth flow hole slot array 7 are arranged in sequence from small to large in sequence number;

[0030] Other embodiments of the present invention: Figure 1 , Figure 2 and Figure 4, the present application has planned and designed the interior of the platinum material channel, and N or 2N groups of porous partitions 2 are arranged at equal distances (the distance calculation formula is L / (a+1), where L is the length of the platinum material channel clarification section 1, and a is the number of porous partitions 2) in the inner cavity of the platinum material channel clarification section 1, and the material of the porous partition 2 adopts reinforced platinum or platinum-rhodium alloy, wherein the width and height dimensions of the porous partition 2 match the inner width (W) and inner height (H) of the platinum material channel clarification section 1, and the thickness is set to 0.8-4mm;

[0031] In addition, according to "the two ends of the platinum material channel are provided with openings for glass liquid to enter and exit, the platinum material channel includes a platinum material channel clarification section 1 and ports arranged on both sides of the platinum material channel clarification section 1, the interior of the platinum material channel clarification section 1 is provided with a cavity for accommodating an isolating member, the operating hole groove is arranged inside the isolating member and is used for glass liquid to flow, the operating hole groove is through-opened on the porous partition 2 and includes a central hole and strip holes arranged concentrically, wherein the length d1 of the central hole is W / 50~W / 200 (W is the inner width of the clarification section) and a plurality of the strip holes are distributed in a circular array, wherein the central hole includes a flow The arrangement of "through center hole 3, strip holes including first flow hole slot 4, second flow hole slot 5, third flow hole slot 6 and fourth flow hole slot array 7 which are arranged through the porous partition plate 2, and the first flow hole slot 4, second flow hole slot 5, third flow hole slot 6 and fourth flow hole slot array 7 are arranged in sequence from small to large" requires that a flow center hole 3, first flow hole slot 4, second flow hole slot 5, third flow hole slot 6, fourth flow hole slot array 7, edge flow hole slot array 8 and partition plate wall 9 are arranged inside the porous partition plate 2, wherein the diameter calculation formula of the flow center hole 3 is:

[0032]

[0033] In addition, the first flow hole slot 4, the second flow hole slot 5 and the third flow hole slot 6 are all slot array structures containing 4 groups of arc-shaped long holes, which are distributed with the flow center hole 3 as the center and arranged in a 90° array with a calculated radius, wherein the calculation radius formula is:

[0034]

[0035] Wherein, i is the number of the first to third arrays, 0<i≤n≤3;

[0036] In addition, the fourth flow hole array 7 comprises two groups of symmetrically distributed arc-shaped long strip holes, which are mirror-distributed along the longitudinal center axis of the porous partition plate 2, and the spacing with the flow center hole 3 is 0.6-0.65W;

[0037] Other embodiments of the present invention: Figure 1 , Figure 2 , Figure 3and Figure 4 , further comprising a spacer, wherein the spacer is arranged in a linear array inside the platinum channel, the operating holes further comprising an edge flow hole array 8, the outer side of the porous partition 2 is provided with a partition wall, the contact surface is the side surface of the partition wall, the edge flow hole array 8 is opened at the outer end of the partition wall, and the structure of the edge flow hole array 8 is formed by a combination of a long strip hole array and an arc-shaped long strip hole array, the porous partition 2 is movably connected to the platinum channel clarification section 1 through the edge flow hole array 8 and the partition wall 9, specifically, the edge flow hole array 8 is an array component of a long strip hole array and an arc-shaped long strip hole, which is evenly distributed at the connection between the porous partition 2 and the platinum channel clarification section 1, and the number of arrangements in width and height is greater than or equal to 2;

[0038] In addition, the partition wall 9 is a rigid wall connecting the flow center hole 3, the first flow hole slot 4, the second flow hole slot 5, the third flow hole slot 6, the fourth flow hole slot array 7 and the edge flow hole slot array 8. The porous partition 2 and the platinum channel clarification section 1 are connected as an integrated structure. If the aperture of the flow center hole 3 is d1, the first flow hole slot 4 is d2, the second flow hole slot 5 is d3, the third flow hole slot 6 is d4, the fourth flow hole slot array 7 is d5, and the edge flow hole slot array 8 is d6, then d6: d5: d4: d3: d2: d1 ≈ X 4 :X 4 :X 3 :X 2 :X:1, the value range of X is 1.2-1.4, and the specific ratio of d6:d5:d4:d3:d2:d1 is approximately 1.34:1.34:1.33:1.32:1.3:1.

[0039] Other embodiments of the present invention: When the glass liquid with a non-flow-direction internal and external temperature difference (the center temperature is higher than the side) flows through the porous partition plate 2 along the inlet of the platinum channel clarification section 1, the glass liquid will interact with the partition plate wall 9 and the flow center hole 3, the first flow hole slot 4, the second flow hole slot 5, the third flow hole slot 6, the fourth flow hole slot array 7 and the edge flow hole slot array 8 to produce a flow effect with a corresponding flow rate change. When the glass flows through the center hole 3, due to the small aperture area of ​​the flow center hole 3 and the limited flow area of ​​the glass liquid, the flow rate allocated to the hole position is lowered, so the limited glass liquid is accelerated to the surroundings along the partition plate wall 9, that is, the glass liquid is transmitted and mass transferred to the surroundings. By analogy, the flow direction and rate of the glass liquid when it encounters the first flow hole slot 4, the second flow hole slot 5, the third flow hole slot 6 and the fourth flow hole slot array 7 can be calculated;

[0040] Therefore, as the aperture area of ​​the hole slot array increases closer to the outside, the glass liquid is less restricted when it flows through the holes and slots on the outside. The greater the distributed flow rate when it flows out of the hole slot, the greater the cumulative heat brought by the flow of the glass liquid, and therefore the higher the temperature. Furthermore, combined with the partition, the glass liquid originally having a temperature difference is redistributed through the circulation center hole 3, the first circulation hole slot 4, the second circulation hole slot 5, the third circulation hole slot 6, the fourth circulation hole slot array 7 and the edge circulation hole slot array 8 with different circulation aperture areas, so that the temperature difference between the inside and outside is balanced and improved by transferring the center flow velocity to the external flow velocity, thereby achieving the effect of improving the temperature difference between the inside and outside.

[0041] In addition, the edge flow hole array 8 is mainly used to reduce the retention effect of the glass liquid at the connection between the porous partition 2 and the platinum channel clarification section 1, and the glass liquid diffused and transferred from the inside along the partition wall 9 to the edge also increases the flow distribution of the edge glass, further increasing the temperature of the edge and reducing the temperature difference between the inside and the outside.

[0042] Other embodiments of the present invention: Figure 3 , Figure 4 , Figure 5 and Figure 6 In order to further reflect the internal and external temperature difference caused by the flow difference of the glass liquid on the non-flow section, a comparative test was conducted on the platinum channel clarification section scheme with and without a partition. Two groups of porous partitions 2 were arranged in the platinum channel clarification section 1 along the direction of its length L, wherein the porous partition 2 has a width of 330 mm, a height of H, a thickness of 1.5 mm, and a material of reinforced platinum. The diameter of the flow center hole 3 is 3 mm, and the widths of the first flow hole slot 4, the second flow hole slot 5, the third flow hole slot 6, the fourth flow hole slot array 7, and the edge flow hole slot array 8 are 4 mm, 5 mm, 7 mm, 10 mm, and 10 mm, respectively. The distances from the first flow hole slot 4, the second flow hole slot 5, the third flow hole slot 6, the fourth flow hole slot array 7, and the edge flow hole slot array 8 to the center of the flow center hole 3 meet the requirements. The calculation formula is: in actual control, the heating circuit of this section is adjusted and set to achieve three groups of clarification temperature systems of "1500℃, 1550℃, and 1580℃", and the welding couple (such as Figure 4 ) to characterize the quantitative differences of the glass liquid on the non-flowing cross section after flowing through the partition under the three temperature regimes (as shown in Figure 6 ), and compared with the data difference without this structural scheme (as shown in Figure 5 shown), from Figure 5 and Figure 6As is known, at a temperature of 1500°C, 1550°C or 1580°C, the temperature changes of the platinum channel clarification section 1 with a porous baffle 2 are respectively [1480, 1500], [1520, 1540] and [1540, 1580], while the temperature changes of the platinum channel clarification section 1 without a porous baffle 2 (i.e., no baffle) are respectively [1450, 1500], [1500, 1550] and [1520, 1580]. It can be clearly concluded that based on the use of the baffle of this scheme, the internal and external temperature difference along the width direction of the clarification section is reduced by about 20°C compared with the scheme without baffles, and the actual effect is improved.

[0043] The working principle of the present invention is as follows: the purpose of the present invention is to design an internal component suitable for the clarification part of the platinum channel in the field of optical glass manufacturing, and the component is a partition wall 9 that can be used to improve the difference between glass liquid fluids in the non-flow direction. In addition, multiple groups of such partition walls 9 are arranged inside the tube body at the corresponding part of the platinum channel clarification section 1, and multiple groups of through holes with different flow aperture areas and shapes are arranged on the surface of the partition wall 9. Through the combined effect of the through holes on the partition wall 9 and the friction resistance of the rigid wall, the turbulence intensity of the fluid in the non-flow direction when flowing through the partition is increased, thereby improving the overall temperature, flow rate and other fluid differences.

[0044] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A porous partition structure for improving the temperature difference of glass liquid, characterized in that: include: The isolating member comprises a contact surface and a porous partition (2), wherein the contact surface is connected to both sides of the porous partition (2) and is adapted to the platinum channel clarification section (1); An operation hole groove is provided through the porous partition plate (2), the operation hole groove comprises a central hole and strip holes, the length of the central hole is d1, d1=W / 50~W / 200, W is the inner width of the clarification section, and a plurality of strip holes are distributed in a circular array and are arranged concentrically with the circular hole.

2. The porous partition structure for improving the temperature difference of glass liquid by using a platinum channel according to claim 1, characterized in that: The central hole comprises a circulation central hole (3) and is arranged at the central position of the porous partition plate (2); the strip holes comprise a first circulation hole slot (4), a second circulation hole slot (5), a third circulation hole slot (6) and a fourth circulation hole slot array (7); the strip holes are centered on the central hole and are distributed in a circular array in sequence at the circumference of the circulation central hole (3); wherein the distance D between the strip holes and the central hole is calculated as follows: Wherein, i is the serial number of the first flow hole slot (4), the second flow hole slot (5), the third flow hole slot (6) and the fourth flow hole slot array (7), 0<i≤n≤3.

3. The porous partition structure for improving the temperature difference of glass liquid by using a platinum channel according to claim 2, characterized in that: The central flow hole is a circular hole.

4. The porous partition structure for improving the temperature difference of glass liquid by using a platinum channel according to claim 3, characterized in that: The operating hole slots also include an edge flow hole slot array (8), the outer side of the porous partition plate (2) is provided with a partition plate wall surface, the contact surface is the side surface of the partition plate wall surface, and the edge flow hole slot array (8) is opened at the outer end of the partition plate wall surface.

5. The porous partition structure for improving the temperature difference of glass liquid by using a platinum channel according to claim 4, characterized in that: The structure of the edge flow hole array (8) is formed by combining a long strip hole array and an arc-shaped long strip hole array.

6. The porous partition structure for improving the temperature difference of glass liquid by using a platinum channel according to claim 5, characterized in that: The edge flow hole array (8) is evenly distributed at the connection between the porous partition plate (2) and the platinum channel clarification section (1), and the distribution number of the edge flow hole array (8) follows the principle that the arrangement number in width and height is ≥2.

7. A porous partition structure for improving the temperature difference of glass liquid by using a platinum channel according to claim 6, characterized in that: The fourth flow hole array (7) is composed of two groups of symmetrically distributed arc-shaped long strip holes, and the distance between the fourth flow hole array (7) and the flow center hole (3) is 0.6-0.65W.

8. The porous partition structure for improving the temperature difference of glass liquid by using a platinum channel according to claim 7, characterized in that: The fourth flow hole array (7) is arranged in a mirror-symmetrical manner along the longitudinal center axis of the porous partition plate (2).

9. A porous partition structure for improving the temperature difference of glass liquid by using a platinum channel according to claim 8, characterized in that: The diameter of the central circulation hole (3) is d1, the slot width of the first circulation hole slot (4) is d2, the slot width of the second circulation hole slot (5) is d3, the slot width of the third circulation hole slot (6) is d4, the slot width of the fourth circulation hole slot array (7) is d5, and the slot width of the edge circulation hole slot array (8) is d6, wherein d6:d5:d4:d3:d2:d1≈X 4 :X 4 :X 3 :X 2 :X:1, X value range is 1.2-1.

4.

10. A platinum channel, characterized in that: The platinum channel clarification section (1) is provided with a cavity for accommodating a spacer inside, and the porous partition structure is arranged in the cavity through the partition wall surface and is arranged in a linear array.

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