Bubbling device at bottom of UTG glass melting furnace

Abstract

The invention relates to a UTG glass melting furnace tank bottom bubbling device which comprises a bubbling pipe, a bubbling nozzle and a bubbling nozzle, the nozzle brick is embedded into the pool bottom of the UTG glass melting furnace, a mounting through hole is formed in the nozzle brick, and the bubbling pipe is mounted on the nozzle brick through the mounting through hole; the bubbling boss is formed by arranging pool bottom bricks around the nozzle brick, the height of the bubbling boss is higher than that of the pool bottom of the UTG glass melting furnace, the height of the nozzle brick is higher than that of the bubbling boss, and the pool bottom of the UTG glass melting furnace, the bubbling boss and the nozzle brick form a stepped pool bottom bubbling structure. The structural strength of the pool bottom around the bubbling nozzle is enhanced, and the distance from the bubbling nozzle to the pool bottom is also increased, so that molten glass caused by bubbling is prevented from flowing back to be excessively close to the pool bottom, erosion corrosion to pool bottom bricks is reduced, the service life of the pool bottom bubbling device and the glass melting furnace is prolonged, and the production cost is reduced. And the turbid defect caused by scouring and erosion of molten glass is also avoided.

Description

Technical Field

[0001] The present application relates to the technical field of UTG glass melting furnaces, and in particular to a UTG glass melting furnace pool bottom bubbling device. Background Art

[0002] With the development of car displays and foldable screen mobile phones, the demand for UTG (Ultra-Thin Glass) is becoming stronger and stronger, and the production requirements are becoming higher. The thickness of UTG glass is usually between 1.2 mm and 0.1 mm, and it can be bent or folded. During the production process, the homogenization and clarification effects of the glass liquid are required to be high.

[0003] In order to improve the homogenization and clarification of glass liquid, glass melting furnaces usually use pool bottom bubbling technology. For example, Chinese Patent No. 201610642974.9 discloses a melting furnace equipment and a liquid crystal glass production system, that is, a bubbling point is set at the pool bottom between the melting zone and the clarification zone of the glass melting furnace, thereby bubbling a certain pressure of gas into the kiln, and the surrounding glass liquid is driven by the rising movement of bubbles without destroying the normal convection of the glass liquid, thereby promoting the clarification and homogenization of the glass liquid. Figure 1 As shown, by setting a bubbling tube 1 at the bottom of the pool, the surrounding glass liquid can be driven to move by the rising movement of the bubble 12. After bubbling, a circular liquid flow from bottom to top is added near the hot spot of the glass melting furnace, such as Figure 1 As shown, the heat convection formed by the hot spot is strengthened, and the slag that has not yet melted can be effectively blocked from flowing to the clarification zone. However, if the bubbling structure is not properly set, it may be counterproductive, causing serious corrosion of the melting furnace, endangering the safety of the bubbling structure, and causing more defects such as turbidity of the glass liquid. Summary of the invention

[0004] The present application provides a UTG glass melting furnace bottom bubbling device to solve the problem that the UTG glass melting furnace bottom bubbling device in the prior art is improperly set up, which easily causes corrosion of the melting furnace, endangers the safety of the bubbling structure and affects the turbidity of the glass liquid.

[0005] A UTG glass melting furnace bottom bubbling device provided in the present application includes:

[0006] A bubbling tube, wherein a bubbling nozzle is arranged at the end of the bubbling tube;

[0007] Nozzle brick, the nozzle brick is embedded in the bottom of the UTG glass melting furnace, the nozzle brick is provided with a mounting through hole, and the bubbling tube is mounted on the nozzle brick through the mounting through hole;

[0008] The bubbling boss is formed by pool bottom bricks surrounding nozzle bricks. The height of the bubbling boss is higher than the pool bottom of the UTG glass melting furnace. The height of the nozzle brick is higher than the bubbling boss. The pool bottom, bubbling boss and nozzle bricks of the UTG glass melting furnace form a stepped pool bottom bubbling structure.

[0009] In some embodiments, the bubbling boss is 50-100 mm higher than the pool bottom of the UTG glass melting furnace, the nozzle brick is 50-100 mm higher than the bubbling boss, and the bubbling nozzle is 50-100 mm higher than the nozzle brick.

[0010] In some embodiments, the nozzle brick is in an inverted T-shape and is embedded in the bottom of the UTG glass melting furnace. A hollow support tile is provided on the lower side of the nozzle brick. The bubbling tube passes through the support tile and the nozzle brick to extend the bubbling nozzle into the UTG glass melting furnace.

[0011] In some embodiments, the pool bottom structure of the UTG glass melting furnace includes: a pool bottom brick layer, a zircon layer and a lower supporting structure; the upper and lower sides of the zircon layer are filled with refractory ramming material layers, and the inverted T-shaped part of the nozzle brick is flush with the upper surface of the lower supporting structure, and together with the lower supporting structure, supports the refractory ramming material layer, the zircon layer and the pool bottom brick layer.

[0012] In some embodiments, the bubbling nozzle is made of one or more of platinum, platinum-rhodium alloy, heat-resistant steel, corundum, silicon dimolybdenum and metal ceramics; the nozzle brick adopts 41 oxidation method AZS brick.

[0013] In some embodiments, a cooling air duct is further provided around the bubbling tube in the hollow area of ​​the support tile.

[0014] In some embodiments, in a UTG glass melting furnace, every 6 to 10 m 2 A bubbling tube is arranged in the melting area, and the spacing between the bubbling tubes is 0.4-0.8m. The distance between the bubbling tube at the edge and the pool wall of the UTG glass melting furnace is not less than 0.8-1.0m.

[0015] In some embodiments, the bubbling tubes are arranged in a single row or multiple rows according to the area size of the UTG glass melting furnace, and each row of bubbling tubes is arranged in a straight line perpendicular to the flow direction of the molten glass, or in a curve along the bubble boundary of the molten glass.

[0016] In some embodiments, in the bubbling tubes arranged in multiple rows, the bubbling tubes in each row are arranged in a front-to-back staggered manner in the flow direction of the glass liquid, and the heights are alternately arranged.

[0017] In some embodiments, the bubbling tube adopts low-pressure continuous bubbling, the number of bubbles is 20 to 40 per minute, the bubbling pressure is 0.03 to 0.05 MPa, and the minimum equilibrium pressure is 0.02 MPa; alternatively, the bubbling tube adopts high-pressure pulse bubbling, the number of bubbles is 2 to 15 per minute, the bubble diameter is 100 to 250 mm, the bubbling pressure is 0.2 to 0.4 MPa, and the minimum equilibrium pressure is not less than 0.01 to 0.02 MPa.

[0018] The technical solution of the present application forms a stepped pool bottom bubbling structure by arranging nozzle bricks and bubbling bosses, thereby strengthening the pool bottom structural strength around the bubbling nozzle and increasing the distance between the bubbling nozzle and the pool bottom, thereby preventing the bubbling-induced glass liquid from flowing back too close to the pool bottom, reducing the scouring and corrosion of the pool bottom bricks, increasing the service life of the pool bottom bubbling device and the glass melting furnace, and avoiding turbidity defects caused by scouring and erosion of the glass liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 The schematic diagram of the principle of bubbling driving the glass liquid to reflux is shown;

[0022] Figure 2 The schematic diagram of the structure of the bottom bubbling device of the UTG glass melting furnace of the present application is shown;

[0023] Figure 3 A schematic diagram of the top view of the structure of multiple rows of bubbling tubes of the bottom bubbling device of the UTG glass melting furnace of the present application is shown;

[0024] Figure 4 A side view structural schematic diagram of multiple rows of bubbling tubes of the UTG glass melting furnace bottom bubbling device of the present application is shown.

[0025] The above drawings include the following reference numerals:

[0026] 1. Bubble tube; 11. Bubble nozzle; 12. Bubble; 2. Nozzle brick; 3. Bubble boss; 4. Support tile; 5. Pool bottom structure; 51. Pool bottom brick layer; 52. Zircon layer; 53. Refractory ramming material layer; 54. Lower support structure; 6. Cooling air duct; 7. Glass liquid; 8. Melting section. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Figures 1 to 4 An embodiment of the UTG glass melting furnace bottom bubbling device of the present application is schematically shown.

[0033] like Figures 1 to 4 As shown, the present application discloses a UTG glass melting furnace pool bottom bubbling device, comprising: a bubbling tube 1, a bubbling nozzle 11 is arranged at the end of the bubbling tube 1. A nozzle brick 2, the nozzle brick 2 is embedded in the pool bottom of the UTG glass melting furnace, the nozzle brick 2 is provided with a mounting through hole, and the bubbling tube 1 is installed on the nozzle brick 2 through the mounting through hole. A bubbling boss 3, the bubbling boss 3 is formed by pool bottom bricks surrounding the nozzle brick 2, the height of the bubbling boss 3 is higher than the pool bottom of the UTG glass melting furnace, the height of the nozzle brick 2 is higher than the bubbling boss 3, and the pool bottom of the UTG glass melting furnace, the bubbling boss 3 and the nozzle brick 2 form a stepped pool bottom bubbling structure.

[0034] refer to Figure 1 As shown in the figure, since the temperature of the glass liquid 7 in the melting furnace is as high as 1600℃, the pool bottom bricks will creep due to the high temperature, and the strength will be reduced, which will be easily washed off by the glass liquid 7. Therefore, when the pool bottom is bubbling, the flow speed of the glass liquid 7 near the bubbling nozzle 11 is accelerated, especially the immovable layer of glass liquid 7 at the bottom of the pool is also driven to participate in the flow, which will cause aggravated erosion of the pool bottom bricks near the bubbling point, which is very likely to cause leakage, shorten the kiln life, and endanger the safety of the bubbling device and the quality of the glass liquid 7, becoming the culprit affecting the safety of the melting furnace and the quality of the glass liquid 7.

[0035] Therefore, the embodiment of the present application adopts the above-mentioned design to set the nozzle brick 2 and the bubbling boss 3 to form a stepped pool bottom bubbling structure, thereby strengthening the pool bottom structural strength around the bubbling nozzle 11 and increasing the distance between the bubbling nozzle 11 and the pool bottom, thereby preventing the bubbling-induced glass liquid torrent from being too close to the pool bottom, reducing the scouring and corrosion effects on the pool bottom bricks, improving the service life of the pool bottom bubbling device and the glass melting furnace, and reducing the turbidity defects caused by the scouring and erosion of the pool bottom bricks by the glass liquid.

[0036] Specifically in actual production, the applicant has discovered through actual production experience that the degree to which the bubbling nozzle 11 extends into the glass liquid 7 is crucial to the quality of the bubbling effect. If the bubbling nozzle 11 extends too far, the stirring effect on the glass liquid 7 is not strong enough, the homogenization and clarification effect is not good, and the viscosity of the upper layer of glass liquid 7 is relatively small. During the bubbling interval, the glass liquid 7 is easy to flow back into the bubbling nozzle 11, causing a blockage failure; if it extends too little, the erosion of the pool bottom will be too serious, affecting the life of the melting furnace. Therefore, in some embodiments of the present application, the bubbling nozzle 11 can generally be 150 to 500 mm higher than the bottom of the pool, and 50 to 100 mm higher than the nozzle brick, to prevent the glass liquid 7 from flowing too fast and causing scouring and erosion of the melting furnace and the bubbling device, while avoiding the phenomenon of glass liquid 7 backflow blocking the bubbling tube 1. In some preferred embodiments of the present application, reference Figure 2 As shown, in the stepped bottom bubbling structure, the bubbling boss 3 is 50-100 mm (75 mm in the figure) higher than the bottom of the UTG glass melting furnace, the nozzle brick 2 is 50-100 mm (50 mm in the figure) higher than the bubbling boss, and the bubbling nozzle 11 is 50-100 mm (50 mm in the figure) higher than the nozzle brick. Thus, the bubbling nozzle 11 is about 150-300 mm (175 mm in the figure) higher than the bottom of the UTG glass melting furnace to form a better anti-scouring and anti-clogging effect.

[0037] In some embodiments of the present application, reference Figure 2 As shown, the nozzle brick 2 is in an inverted T-shape and is embedded in the bottom of the UTG glass melting furnace. A hollow support tile 4 is provided on the lower side of the nozzle brick 2. The bubbling tube 1 passes through the support tile 4 and the nozzle brick 2, and the bubbling nozzle 11 is extended into the UTG glass melting furnace. The inverted T-shaped nozzle brick 2 is more convenient to be embedded and installed in the bottom of the UTG glass melting furnace, and is integrated with the bottom of the pool, thereby improving the integrity and reliability of the bubbling device.

[0038] In some embodiments of the present application, continue to refer to Figure 2 As shown, the pool bottom structure 5 of the UTG glass melting furnace specifically includes: a pool bottom brick layer 51, a zircon layer 52 and a lower support structure 54. The upper and lower sides of the zircon layer 52 are filled with a refractory ramming material layer 53, and a multi-layer structure is used to form a reliable refractory and heat-insulating performance. The inverted T-shaped part of the nozzle brick 2 is flush with the upper surface of the lower support structure 54, so that it supports the refractory ramming material layer 53, the zircon layer 52 and the pool bottom brick layer 51 together with the lower support structure 54, so that the nozzle brick 2 and the UTG glass melting furnace are better integrated, the integrity and firmness of the melting furnace are improved, and its service life is extended. Among them, the lower support structure 54 also includes a multi-layer structure to meet the requirements of refractory performance and strength performance at the same time.

[0039] In some embodiments of the present application, in order to further resist the erosion and corrosion of the glass liquid 7, the bubbling nozzle 11 is made of a material that is resistant to high temperature, erosion, high in strength and not easy to oxidize. For example, the bubbling nozzle 11 is made of one or more of platinum, platinum-rhodium alloy, heat-resistant steel, corundum, silicon dimolybdenum and metal ceramics, among which platinum and platinum-rhodium alloy are used as the head of the nozzle. The inner diameter of the bubbling nozzle 11 is set at 1 to 3 mm, and a number of small holes are opened on it for exhaust, which is convenient for the formation of bubbles 12 and can prevent the glass liquid 7 from flowing back into the bubbling nozzle 11. In addition, the nozzle brick 2 adopts 41 oxidation method AZS brick, such as AZS41# electric fused zirconium corundum brick, which has eutectic of silicon oxide and aluminum oxide, and uniformly distributed zirconium oxide crystals, and has good corrosion resistance. It is used as the nozzle brick 2 at the bottom of the glass melting furnace, which can ensure the corrosion resistance of the entire bubbling device and extend the service life of the bubbling device and the UTG glass melting furnace.

[0040] In some embodiments of the present application, Figure 2 As shown, in the hollow area of ​​the support tile 4 , a cooling air duct 6 is further provided around the bubbling tube 1 to cool the bubbling tube 1 and reduce the adverse effects of high temperature on the bubbling tube 1 .

[0041] In some embodiments of the present application, the bubbling device of this embodiment is also provided with a bubbling gas source. Because the bubbling nozzle 11 is continuously operated in the high-temperature glass liquid 7 during the entire kiln operation cycle, if the gas source is not well purified and carries impurities such as water, oil and dust, it will scale on the fine inner wall of the bubbling nozzle 11, so as to block the air outlet, causing "scaling blockage". Therefore, the bubbling gas source generally uses purified compressed air, and the air coming out of the air compressor is freeze-dried to remove moisture, and then purified by a coarse filter and a fine filter to form an air source that can be used for bubbling. In addition, in some embodiments of the present application, in order to maintain a stable air supply pressure, the bubbling gas source must be redundantly designed and a backup gas source is provided to prevent production interruptions caused by emergencies such as power outages. Among them, the main gas source can be a continuous gas supply source composed of an air compressor, a condensation dryer, a coarse filter and a fine filter, and the backup gas source can be a high-pressure gas storage cylinder, so as to achieve stable air pressure supply in emergencies such as power outages.

[0042] In some embodiments of the present application, in a UTG glass melting furnace, the number of bubbling tubes 1 is designed according to the area of ​​the melting part 8 of the melting furnace. 2A bubbling tube 1 is set in the melting part 8 area, and the spacing between the bubbling tubes 1 is 0.4-0.8m. The distance between the bubbling tubes 1 at the edge and the pool wall of the UTG glass melting furnace is not less than 0.8-1.0m. In the design of the bubbling device, the more suitable bubbling position is at the hot spot in the kiln or a little behind the hot spot. The hot spot is the position with the highest temperature in the middle of the glass liquid. The liquid flow rising from the bottom of the pool flows from the hot spot to all directions, so the hot spot is also called the liquid flow source (referred to as liquid spring). The bubbling tube 1 is set at the hot spot, and the reflux of the glass liquid 7 formed is basically coincident with the reflux formed by the hot spot, which can better play the role of blocking and stirring, while other inappropriate positions will destroy the flow field of the glass liquid 7 in the kiln, and it is more likely to produce bubbles and stone defects. At the same time, the design number of bubbling tubes 1 is related to factors such as the size of the bubble diameter, the distance between the bubbling tubes 1 and the kiln width. The embodiment of the present application preferably determines that every 6-10m 2 The melting part 8 is provided with a bubbling tube 1. The distance between the bubbling tubes 1 is 0.4-0.8m, wherein the larger the bubble diameter, the fewer the number of bubbling tubes 1 and the larger the distance between the bubbling tubes 1. At the same time, in order to prevent excessive damage to the melting furnace pool wall, the distance between the bubbling tube 1 located at the edge and the pool wall should not be less than 0.8-1m, so as to reduce the erosion of the pool wall by the glass liquid torrent and protect the safety of structures such as electrode bricks.

[0043] In some embodiments of the present application, the bubbling tubes 1 are arranged in a single row or multiple rows according to the area size of the UTG glass melting furnace. The arrangement method is related to the number of bubbling tubes 1 and the size of the melting furnace. Smaller melting furnaces are mostly arranged in a single row, while large furnaces are arranged in double rows or multiple rows in a staggered manner. Each row of bubbling tubes 1 can be arranged in a straight line perpendicular to the flow direction of the glass liquid 7, or each row of bubbling tubes 1 can also be arranged along the bubble boundary curve of the glass liquid 7.

[0044] In some embodiments of the present application, reference Figure 3 and Figure 4 As shown, in the bubbling tubes 1 arranged in multiple rows, the bubbling tubes 1 in each row are arranged in a staggered manner in the flow direction of the glass liquid 7, and the height is alternately fluctuated. By arranging the bubbling tubes 1 in a staggered manner in the front and back, the glass liquid 7 can be better driven to rise; by the alternating high and low fluctuation design of the bubbling tubes 1, bubbling can be started at different heights to form convection between the glass liquid 7, thereby promoting the glass liquid 7 in the bubbling area to roll up and down and left and right, forming an extrusion effect, promoting the discharge of bubbles in the glass liquid 7, inhibiting the growth of crystallization, thereby clarifying the glass liquid 7 in all directions without dead angles, and reducing the bubble and stone defects of the glass liquid 7.

[0045] In some embodiments of the present application, there are two bubbling modes: low-pressure continuous bubbling and high-pressure pulse bubbling. The pressure used for low-pressure continuous bubbling and the diameter of the obtained bubble 12 are both smaller than those of high-pressure pulse bubbling, and the bubbling speed is faster. Specifically, the number of bubbles in low-pressure continuous bubbling is 20 to 40 / min, the bubbling pressure is 0.03 to 0.05 MPa, and the minimum equilibrium pressure is 0.02 MPa. The number of bubbles in high-pressure pulse bubbling is 2 to 15 / min, the bubble diameter is 100 to 250 mm, the bubbling pressure is 0.2 to 0.4 MPa, and the minimum equilibrium pressure is not less than 0.01 to 0.02 MPa. Among them, the bubbling speed depends on the stirring intensity of the glass liquid 7. When the stirring intensity is high, the bubbling needs to be violent and the bubbling speed is high. When the bubbling intensity is low, the bubbling needs to be gentle and the bubbling speed is low. Generally speaking, the bubbling speed of high-pressure pulse bubbling is slower than that of low-pressure continuous bubbling, which is 2 to 15 bubbles / min, and the diameter of the bubble 12 is about 100 to 250 mm. The bubbling pressure depends on the viscosity and depth of the glass liquid 7 and the method of gas supply. If the pressure is too high and the gas flow is too large, the normal bubble-like bubbling will turn into jet-like bubbling. At this time, in addition to large bubbles 12, small bubbles will also appear in the glass liquid 7, which is not conducive to clarification. In the embodiment of the present application, the bubbling pressure of low-pressure continuous bubbling is 0.03 to 0.05 MPa, and the minimum balance pressure is not less than 0.02 MPa to avoid "extinguishing" the bubbling operation; the bubbling pressure of high-pressure pulse bubbling is 0.2 to 0.4 MPa, and the minimum balance pressure is a balance pressure of 0.01 to 0.02 MPa to prevent the glass liquid 7 from flowing back into the bubbling nozzle 11 during the interval time.

[0046] In summary, the technical solution of the present application, through bubbling at the bottom of the pool, utilizes the rise of bubbles to drive the movement of the surrounding glass liquid, promotes the removal of bubbles in the glass liquid, strengthens the heat exchange between the glass liquids, can significantly improve the chemical uniformity and thermal uniformity of the glass liquid, and greatly reduces the defects such as bubbles, stones and streaks of UTG glass products. Among them, the embodiment of the present application forms a stepped pool bottom bubbling structure by setting nozzle bricks and bubbling bosses, strengthens the strength of the pool bottom structure around the bubbling nozzle, and increases the distance between the bubbling nozzle and the pool bottom, so as to avoid the bubbling-induced glass liquid torrent from being too close to the pool bottom, reduce the scouring and corrosion of the pool bottom bricks, and increase the service life of the pool bottom bubbling device and the glass melting furnace, while avoiding the turbidity defects caused by scouring and erosion of the glass liquid.

[0047] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A UTG glass melting furnace bottom bubbling device, characterized in that: include: A bubbling tube (1), wherein a bubbling nozzle (11) is provided at the end of the bubbling tube (1); A nozzle brick (2), wherein the nozzle brick (2) is embedded in the bottom of the UTG glass melting furnace, and a mounting through hole is provided on the nozzle brick (2), and the bubbling tube (1) is mounted on the nozzle brick (2) through the mounting through hole; The bubbling boss (3) is formed by pool bottom bricks arranged around the nozzle brick (2); the height of the bubbling boss (3) is higher than the pool bottom of the UTG glass melting furnace; the height of the nozzle brick (2) is higher than the bubbling boss (3); the pool bottom of the UTG glass melting furnace, the bubbling boss (3) and the nozzle brick (2) form a stepped pool bottom bubbling structure.

2. The UTG glass melting furnace bottom bubbling device according to claim 1, characterized in that: The bubbling boss (3) is 50 to 100 mm higher than the bottom of the UTG glass melting furnace, the nozzle brick (2) is 50 to 100 mm higher than the bubbling boss (3), and the bubbling nozzle (11) is 50 to 100 mm higher than the nozzle brick (2).

3. The UTG glass melting furnace bottom bubbling device according to claim 2, characterized in that: The nozzle brick (2) is in an inverted T-shape and is embedded in the bottom of the UTG glass melting furnace. A hollow support tile (4) is provided on the lower side of the nozzle brick (2). The bubbling tube (1) passes through the support tile (4) and the nozzle brick (2) to extend the bubbling nozzle (11) into the UTG glass melting furnace.

4. The UTG glass melting furnace bottom bubbling device according to claim 3, characterized in that: The pool bottom structure (5) of the UTG glass melting furnace comprises: a pool bottom brick layer (51), a zircon layer (52) and a lower support structure (54); the upper and lower sides of the zircon layer (52) are filled with a refractory ramming material layer (53); the inverted T-shaped portion of the nozzle brick (2) is flush with the upper surface of the lower support structure (54), and together with the lower support structure (54), supports the refractory ramming material layer (53), the zircon layer (52) and the pool bottom brick layer (51).

5. The UTG glass melting furnace bottom bubbling device according to claim 3, characterized in that: The bubbling nozzle (11) is made of one or more of platinum, platinum-rhodium alloy, heat-resistant steel, corundum, silicon dimolybdenum and metal ceramics; the nozzle brick (2) is made of 41 oxidation method AZS brick.

6. The UTG glass melting furnace bottom bubbling device according to claim 3, characterized in that: In the hollow area of ​​the support tile (4), a cooling air duct (6) is also arranged around the bubbling tube (1).

7. The UTG glass melting furnace bottom bubbling device according to any one of claims 1 to 6, characterized in that: In the UTG glass melting furnace, every 6 to 10 m 2 The melting section (8) is provided with one bubbling tube (1), the spacing between the bubbling tubes (1) is 0.4 to 0.8 m, and the distance between the bubbling tube (1) at the edge and the pool wall of the UTG glass melting furnace is not less than 0.8 to 1.0 m.

8. The UTG glass melting furnace bottom bubbling device according to any one of claims 1 to 6, characterized in that: The bubbling tubes (1) are arranged in a single row or multiple rows according to the area size of the UTG glass melting furnace, and the bubbling tubes (1) in each row are arranged in a straight line perpendicular to the flow direction of the glass liquid (7), or arranged in a curve along the bubble boundary of the glass liquid (7).

9. The UTG glass melting furnace bottom bubbling device according to claim 8, characterized in that: In the bubbling tubes (1) arranged in multiple rows, the bubbling tubes (1) in each row are arranged in a staggered manner in the flow direction of the glass liquid (7), and their heights are alternately raised and lowered.

10. The UTG glass melting furnace bottom bubbling device according to any one of claims 1 to 6, characterized in that: The bubbling tube (1) adopts low-pressure continuous bubbling, the number of bubbles is 20 to 40 per minute, the bubbling pressure is 0.03 to 0.05 MPa, and the minimum equilibrium pressure is 0.02 MPa; or, the bubbling tube (1) adopts high-pressure pulse bubbling, the number of bubbles is 2 to 15 per minute, the bubble diameter is 100 to 250 mm, the bubbling pressure is 0.2 to 0.4 MPa, and the minimum equilibrium pressure is not less than 0.01 to 0.02 MPa.

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