Novel TFT (Thin Film Transistor) glass melting furnace structure

Abstract

The utility model discloses a novel TFT (Thin Film Transistor) glass melting furnace structure and belongs to the technical field of TFT liquid crystal glass production. The novel TFT glass melting furnace structure provided by the utility model is suitable for a melting furnace with large feeding amount and large tonnage, and is used for dispersing the melting pressure at the feeding side and improving the melting efficiency. By adopting the smelting furnace structure, not only can the accumulation of powder piles be effectively reduced, but also the heat exchange efficiency between the heat energy provided by the electrode and the combustion gun in the smelting furnace and the glass liquid can be improved, so that the integral enhancement of the smelting efficiency is realized. And meanwhile, reasonable utilization of heat energy in other areas in the advancing direction of the molten glass is ensured through the ingenious design of the feeding opening in the side wall, and a solid guarantee is provided for efficient and stable operation of the smelting furnace. And through the design that the feeding ports share the first-stage stock bin, the stability of the feeding amount is guaranteed, and the operation efficiency and the product quality of the smelting furnace are further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of TFT liquid crystal glass production and relates to a novel TFT glass melting furnace structure. Background Art

[0002] From the traditional color cathode ray tube industry to the current flat-panel display revolution, glass has always held a pivotal position as a core component in the display industry. It not only forms the supporting framework and carrier of the entire display device, but is also a crucial component of the optical elements. TFT (Thin Film Transistor) glass, as the core backlight material for liquid crystal displays (LCDs), utilizes meticulously engineered thin-film transistor (TFT) technology to precisely control light transmittance, achieving superior control of pixel brightness and color, resulting in a lifelike visual experience. Due to its high transparency, low power consumption, and exceptionally high contrast, TFT glass is widely popular in various LCD displays.

[0003] However, the manufacturing process of TFT glass is a highly complex and delicate art. The stability of the stockpile significantly impacts the furnace process, which is the cornerstone of ensuring product quality. Currently, glass melting furnaces generally utilize electric hybrid heating strategies to melt glass powder. These utilize oxyfuel combustion technology at the top and multiple pairs of electrodes at the bottom to ensure complete and sufficient melting of the glass powder. During the melting stage, raw materials are steadily fed into the furnace through a feeding system, undergoing melting, clarification, and homogenization processes to provide qualified, homogeneous molten glass for subsequent processing steps.

[0004] When glass powder initially enters the furnace, it relies primarily on the heat radiation from the flames of the heating lances for initial melting. However, the temperature at this stage is often insufficient to fully melt the glass powder. Instead, it forms a semi-molten state between solid and liquid, forming piles of varying sizes. With continued heating from the electrodes and lances, these piles gradually melt, forming molten glass that continues to flow forward. However, as the glass powder continues to melt, new glass powder continues to enter near the feed port, requiring significantly more heat than those further back. When the piles accumulate to a certain size, they can collapse, causing temperature fluctuations within the furnace and affecting the fluidity of the molten glass. The flow of the molten glass has a significant impact on the melting process, the handling of unmelted batch materials, the movement of bubbles, glass formation, homogenization of the molten glass, and erosion of refractory materials. Therefore, precise control of the position and distribution of the piles is crucial.

[0005] At the same time, in the production of substrate glass, increasing furnace tonnage not only significantly increases production capacity but also effectively reduces energy consumption per kilogram of glass, further spreading equipment manufacturing costs and bringing significant economic benefits to manufacturers. However, the increase in furnace tonnage also increases the challenges of the feeding system, especially in terms of increasing the input volume. Excessive powder input in large-tonnage furnaces can cause the melting pressure at the feed port to increase dramatically, approaching or even exceeding the upper limit of the equipment load. This pressure imbalance not only causes process fluctuations and significantly affects the quality of TFT glass products, but also results in excessive energy waste in the remaining areas along the glass flow path.

[0006] Therefore, for large-tonnage furnaces, optimizing the feeding system and ensuring the balanced distribution of melting pressure have become key issues that need to be urgently addressed in the production process of TFT glass furnaces. Summary of the Invention

[0007] The purpose of the utility model is to provide a novel TFT glass melting furnace structure to overcome the problem of imbalance between the powder input amount and the melting pressure in large-tonnage melting furnaces in the prior art.

[0008] The utility model solves the above technical problems through the following technical solutions:

[0009] A novel TFT glass melting furnace structure includes a pool furnace, a burner and electrodes; the pool furnace includes a front wall, a rear wall, a first side wall and a second side wall; the upper parts of the first side wall and the second side wall are both provided with a plurality of burners, and the lower parts are provided with a plurality of electrodes; the front wall is provided with a symmetrical first feeding port and a second feeding port, the first feeding port and the second feeding port are a first group of feeding ports, the first side wall is provided with a third feeding port, the second side wall is provided with a fourth feeding port, the third feeding port and the fourth feeding port are a second group of feeding ports, and the positions of the third feeding port and the fourth feeding port are symmetrical; the electrodes arranged between the third feeding port and the fourth feeding port and the front wall It is a one-zone electrode, and the electrode arranged between the third feeding port and the fourth feeding port and the rear wall is a two-zone electrode, wherein there are 2 to 5 electrodes in one zone; the first feeding port, the second feeding port, the third feeding port and the fourth feeding port are all provided with a screw feeder, the screw feeders on the first feeding port and the third feeding port share a first-level silo, and the screw feeders on the second feeding port and the fourth feeding port share a first-level silo, wherein the outlet end of each first-level silo is connected to the inlet end of the two second-level silos through two first-level screw conveyors, and the outlet end of the second-level silo is respectively connected to the screw feeder on the corresponding feeding port.

[0010] Furthermore, the rotational speeds of the screw feeder and the corresponding first-stage screw conveyor vary in direct linkage, so as to maintain a relatively constant level of powder temporarily stored in the second-stage silo.

[0011] Furthermore, the input mass ratio of the first group of feeding ports to the second group of feeding ports is (100:0) to (50:50).

[0012] Furthermore, the difference in the intra-group input amount between the first group of feeding ports and the second group of feeding ports is 0-10 Kg / h.

[0013] Furthermore, the power of the electrode in the first zone is 100-170 kW, the power of the electrode in the second zone is 0-10 kW lower than that of the electrode in the first zone, and the gas flow rate of the burner is 10-18 m³ / h.

[0014] Furthermore, there are three electrodes in zone one and five electrodes in zone two.

[0015] Furthermore, the first group of feeding openings and the second group of feeding openings are of the same size.

[0016] Furthermore, the distance between adjacent electrodes in the first electrode zone is equal to the distance between adjacent electrodes in the second electrode zone.

[0017] Furthermore, the distance between two adjacent electrodes on the left and right of the third and fourth feeding ports is three times the distance between adjacent electrodes in one zone.

[0018] Furthermore, the positions of the burners and electrodes correspond one to one on the pool furnace.

[0019] Compared with the prior art, the positive progress of the present invention is:

[0020] The utility model provides a new type of TFT glass melting furnace structure, which is suitable for furnaces with large feed volume and large tonnage. Two symmetrically distributed feed ports are set on the front wall, and symmetrical feed ports are also arranged on the first side wall and the second side wall, which effectively reduces the accumulation of powder piles, thereby dispersing the melting pressure generated on the input side of the front wall due to the increase in the amount of powder input; by reducing the volume of the powder pile, the heat exchange efficiency between the heat energy provided by the electrodes and the burners in the furnace and the glass liquid is significantly improved, thereby achieving an overall enhancement of the melting efficiency. At the same time, the setting of the feed ports on the first side wall and the second side wall also ensures the rational use of heat energy in the remaining areas in the direction of the glass liquid's advance, providing a solid guarantee for the efficient and stable operation of the furnace. By designing a common first-level silo for the feed ports, not only is the silo management simplified, but also the consistency of the chemical composition and water content of the raw materials input from different feed ports is ensured, thereby ensuring the stability of the input amount and further improving the operation efficiency of the furnace and the product quality.

[0021] Furthermore, the speed of the screw feeder varies in direct proportion to that of the primary screw conveyor, maintaining a relatively constant level of powder stored in the secondary silo. This ensures a constant feed rate at the screw feeder speed. Simultaneously, by controlling the speed of the primary screw conveyor, the feed rate distribution of each feeder can be adjusted based on the melting state of the tank furnace, maintaining symmetry in the furnace melting process and ensuring comparable erosion rates on the left and right sides, thus ensuring furnace melting stability.

[0022] Furthermore, the first group of feeding ports and the second group of feeding ports are of the same size, and the spiral feeding machines can be used interchangeably.

[0023] Furthermore, by controlling the distance between the electrodes, it is ensured that the powder material is fully melted after passing through the first zone, and sufficient heat exchange is carried out between the third and fourth feeding port areas and the newly fed powder material, thereby reducing the melting pressure of the electrodes in the second zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 This is a partial top view of the first embodiment of the present invention;

[0026] Figure 2 This is a partial front view of the first embodiment of the present utility model;

[0027] Figure 3 This is the overall layout structure diagram of the utility model.

[0028] Among them, 1 is the pool furnace, 1-1 is the front wall, 1-2 is the rear wall, 1-3 is the first side wall, and 1-4 is the second side wall; 2 is the burner; 3 is the electrode, 3-1 is the first zone electrode, and 3-2 is the second zone electrode; 4 is the first group of feeding ports, 4-1 is the first feeding port, and 4-2 is the second feeding port; 5 is the second group of feeding ports, 5-1 is the third feeding port, and 5-2 is the fourth feeding port; 6 is the screw feeder; 7 is the first-level silo; 8 is the first-level screw conveyor; 9 is the second-level silo. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings, which are intended to explain rather than limit the present invention.

[0030] Example 1

[0031] See also Figure 2A new type of TFT glass melting furnace structure includes a pool furnace 1, a burner 2 and an electrode 3; the pool furnace 1 includes a front wall 1-1, a rear wall 1-2, a first side wall 1-3 and a second side wall 1-4; 8 burners 2 are provided on the upper part of the first side wall 1-3 and the second side wall 1-4, and 8 electrodes 3 are provided on the lower part; the front wall 1-1 is provided with a symmetrical first feeding port 4-1 and a second feeding port 4-2, which are the first group of feeding ports 4, the first side wall 1-3 is provided with a third feeding port 5-1, and the second side wall 1-4 is provided with a fourth feeding port 5-2, which are the second group of feeding ports 5, and the positions of the third feeding port 5-1 and the fourth feeding port 5-2 are symmetrical. The electrodes from the third feeding port 5-1 and the fourth feeding port 5-2 to the front wall 1-1 are the first zone electrodes 3-1, and the electrodes to the rear wall 1-2 are the second zone electrodes 3-2, wherein there are three first zone electrodes 3-1 and five second zone electrodes 3-2; the first feeding port 4-1, the second feeding port 4-2, the third feeding port 5-1 and the fourth feeding port 5-2 are all provided with screw feeders 6, the screw feeders 6 on the first feeding port 4-1 and the third feeding port 5-1 share a first-level silo 7, and the screw feeders 6 on the second feeding port 4-2 and the fourth feeding port 5-2 share a first-level silo 7, wherein the outlet end of each first-level silo 7 is connected to the inlet ends of two second-level silos 9 via two first-level screw conveyors 8, and the outlet ends of the second-level silos 9 are respectively connected to the screw feeders 6 on the corresponding feeding ports.

[0032] During use, the ground and evenly mixed raw materials are first transported to the site by ton bags and put into the first-level silo 9. The powder in the first-level silo flows into two first-level screw conveyors 8 at the same time under the action of gravity. The first-level screw conveyor 8 inputs the powder into the second-level silo 9 above the screw feeder 6, and then puts it into the furnace through the screw feeder 6; the speed of the screw feeder 6 and the speed of the first-level screw conveyor 8 change in a proportional relationship. When the input amount of a certain screw feeder is increased, the speed of the corresponding first-level screw conveyor 8 increases accordingly, so as to maintain the temporary powder stored in the second-level silo 9 relatively constant. When the input amount is small, only the first group of feeding ports 4 is enabled to feed powder into the pool furnace 1, and the ratio of powder input from the first group of feeding ports 4 to the second group of feeding ports 5 is 100:0; when the input amount is large, the electrode 3-1 in the first zone reaches the load upper limit, and the powder accumulates into a pile, the second group of feeding ports 5 is enabled to combine with the first group of feeding ports 4 to feed powder into the pool furnace 1. According to the melting state of the powder in the pool furnace 1, the speed of the first-level screw conveyor 8 is used to adjust the powder input by the screw feeder 6, and the input amount distribution between the first group of feeding ports 4 and the second group of feeding ports 5 is controlled to be 50:50, and the input amount difference range between the four feeding ports is controlled to be 0; among them, the power of the electrode 3 is 100 Kw, and the gas flow rate of the burner 2 is 18 m³ / h.

[0033] See also Figure 1By setting up four feeding ports, the accumulation of powder piles is effectively reduced, the heat exchange efficiency is improved, and at the same time, the rational utilization of heat energy from the third and fourth feeding ports to the rear wall area in the direction of glass liquid advancement is ensured; by controlling the distance between the electrodes, it is ensured that the powder has been fully melted after passing through the first zone, and sufficient heat exchange is carried out between the third and fourth feeding ports and the newly fed powder, thereby reducing the melting pressure of the electrodes in the second zone.

[0034] See also Figure 3 By designing a shared primary silo for all feed ports, not only does this simplify silo management, it also ensures consistency in the chemical composition and moisture content of raw materials fed into different feed ports, thereby ensuring input stability and further improving furnace operating efficiency and product quality. By combining multiple feed ports with a primary screw conveyor, this glass melting furnace can flexibly and precisely match the input volume to each feed port. This not only enhances furnace operational flexibility but also further improves the accuracy and stability of the production process.

[0035] Example 2

[0036] A novel TFT glass melting furnace structure includes a pool furnace 1, a burner 2 and an electrode 3; the pool furnace 1 includes a front wall 1-1, a rear wall 1-2, a first side wall 1-3 and a second side wall 1-4; the upper part of the first side wall 1-3 and the second side wall 1-4 are both provided with 9 burners 2, and the lower part is provided with 9 electrodes 3; the front wall 1-1 is provided with a symmetrical first feeding port 4-1 and a second feeding port 4-2, which are a first group of feeding ports 4, the first side wall 1-3 is provided with a third feeding port 5-1, and the second side wall 1-4 is provided with a fourth feeding port 5-2, which are a second group of feeding ports 5, and the positions of the third feeding port 5-1 and the fourth feeding port 5-2 are symmetrical; the electrodes from the third feeding port 5-1 and the fourth feeding port 5-2 to the front wall 1-1 are a The zone electrode 3-1 and the electrode to the rear wall 1-2 are the two-zone electrodes 3-2, wherein there are 5 zone electrodes 3-1 and 4 zone electrodes 3-2; the first feeding port 4-1, the second feeding port 4-2, the third feeding port 5-1 and the fourth feeding port 5-2 are all provided with a screw feeder 6, the screw feeders 6 on the first feeding port 4-1 and the third feeding port 5-1 share a first-level silo 7, the screw feeders 6 on the second feeding port 4-2 and the fourth feeding port 5-2 share a first-level silo 7, wherein the outlet end of each first-level silo 7 is connected to the inlet end of the two second-level silos 9 via two first-level screw conveyors 8, and the outlet end of the second-level silo 9 is respectively connected to the screw feeders 6 on the corresponding feeding ports.

[0037] During use, the ground and evenly mixed raw materials are first transported to the site by ton bags and put into the first-level silo 9. The powder in the first-level silo flows into two first-level screw conveyors 8 at the same time under the action of gravity. The first-level screw conveyor 8 inputs the powder into the second-level silo 9 above the screw feeder 6, and then puts it into the furnace through the screw feeder 6; the speed of the screw feeder 6 and the speed of the first-level screw conveyor 8 change in a proportional relationship. When the input amount of a certain screw feeder 6 is increased, the speed of the corresponding first-level screw conveyor 8 increases accordingly, so as to maintain the temporary storage of powder in the second-level silo 9 relatively constant. Enable the first and second groups of feeding ports, set the power of the first zone electrode 3-1 to 170 kW, the power of the second zone electrode 3-2 to 160 kW, the gas flow rate of the burner 2 to 10 m³ / h, and control the feed amount distribution of the first group of feeding ports 4 and the second group of feeding ports 5 to be 80:20. Control the feed amount difference between the first and second feeding ports to be 10 kg / h, and the feed amount difference between the third and fourth feeding ports to be 10 kg / h.

[0038] Example 3

[0039] A new TFT glass melting furnace structure includes a pool furnace 1, a combustion gun 2 and an electrode 3; the pool furnace 1 includes a front wall 1-1, a rear wall 1-2, a first side wall 1-3 and a second side wall 1-4; the upper parts of the first side wall 1-3 and the second side wall 1-4 are each provided with 8 combustion guns 2, and the lower parts are provided with 8 electrodes 3, and the positions of the combustion guns 2 and the electrodes 3 correspond one to one on the pool furnace 1; the front wall 1-1 is provided with a symmetrical first feeding port 4-1 and a second feeding port 4-2, which are a first group of feeding ports 4, the first side wall 1-3 is provided with a third feeding port 5-1, and the second side wall 1-4 is provided with a fourth feeding port 5-2, which are a second group of feeding ports 5, the positions of the third feeding port 5-1 and the fourth feeding port 5-2 are symmetrical, and the first group of feeding ports 4 and the second group of feeding ports 5 are the same size. The electrodes from the third feeding port 5-1 and the fourth feeding port 5-2 to the front wall 1-1 are the first zone electrodes 3-1, and the electrodes from the third feeding port 5-1 and the fourth feeding port 5-2 to the rear wall 1-2 are the second zone electrodes 3-2. There are two first zone electrodes 3-1 and six second zone electrodes 3-2. The power of the first zone electrodes 3-1 is 100 kW. The gas flow rate of the burner 2 from the third feeding port 5-1 and the fourth feeding port 5-2 to the front wall 1-1 is 10 m³ / h. The spacing between the electrodes in the first zone electrode 3-1 is equal to the spacing between the electrodes in the second zone electrode 3-2. The spacing between two adjacent electrodes on the left and right of the third feeding port 5-1 and the fourth feeding port 5-2 is three times the spacing between the electrodes in the first zone electrode 3-1. The first feeding port 4-1, the second feeding port 4-2, the third feeding port 5-1 and the fourth feeding port 5-2 are all provided with a screw feeder 6. The screw feeders 6 on the first feeding port 4-1 and the third feeding port 5-1 share a first-level silo 7, and the screw feeders 6 on the second feeding port 4-2 and the fourth feeding port 5-2 share a first-level silo 7, wherein the outlet end of each first-level silo 7 is connected to the inlet end of two second-level silos 9 via two first-level screw conveyors 8, and the outlet end of the second-level silo 9 is respectively connected to the screw feeder 6 on the corresponding feeding port.

[0040] During use, the ground and evenly mixed raw materials are first transported to the site by ton bags and put into the first-level silo 9. The powder in the first-level silo flows into two first-level screw conveyors 8 at the same time under the action of gravity. The first-level screw conveyor 8 inputs the powder into the second-level silo 9 above the screw feeder 6, and then puts it into the furnace through the screw feeder 6; the speed of the screw feeder 6 and the speed of the first-level screw conveyor 8 change in a proportional relationship. When the input amount of a certain screw feeder 6 is increased, the speed of the corresponding first-level screw conveyor 8 increases accordingly, so as to maintain the temporary storage of powder in the second-level silo 9 relatively constant. Enable the first and second groups of feeding ports, set the power of the first zone electrode 3-1 to 150 kW, the power of the second zone electrode 3-2 to 145 kW, the gas flow rate of the burner 2 to 15 m³ / h, and control the feed amount distribution of the first group of feeding ports 4 and the second group of feeding ports 5 to be 50:50. Control the feed amount difference between the first and second feeding ports to be 5 kg / h, and the feed amount difference between the third and fourth feeding ports to be 5 kg / h.

[0041] The above content is only for explaining the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A new TFT glass melting furnace structure, characterized by: It comprises a pool furnace (1), a burner (2) and an electrode (3); The pool furnace (1) comprises a front wall (1-1), a rear wall (1-2), a first side wall (1-3) and a second side wall (1-4); A plurality of burners (2) are provided on the upper portion of each of the first side wall (1-3) and the second side wall (1-4), and a plurality of electrodes (3) are provided on the lower portion; The front wall (1-1) is provided with a symmetrical first feeding port (4-1) and a second feeding port (4-2), the first feeding port (4-1) and the second feeding port (4-2) are a first group of feeding ports (4), the first side wall (1-3) is provided with a third feeding port (5-1), the second side wall (1-4) is provided with a fourth feeding port (5-2), the third feeding port (5-1) and the fourth feeding port (5-2) are a second group of feeding ports (5), and the positions of the third feeding port (5-1) and the fourth feeding port (5-2) are symmetrical; The electrodes (3) arranged between the third feeding port (5-1) and the fourth feeding port (5-2) and the front wall (1-1) are one-zone electrodes (3-1), and the electrodes (3) arranged between the third feeding port (5-1) and the fourth feeding port (5-2) and the rear wall (1-2) are two-zone electrodes (3-2), wherein the number of the one-zone electrodes (3-1) is 2 to 5; The first feeding port (4-1), the second feeding port (4-2), the third feeding port (5-1) and the fourth feeding port (5-2) are all provided with a screw feeder (6); the screw feeders (6) on the first feeding port (4-1) and the third feeding port (5-1) share a primary silo (7); the screw feeders (6) on the second feeding port (4-2) and the fourth feeding port (5-2) share a primary silo (7); wherein the outlet end of each primary silo (7) is connected to the inlet end of two secondary silos (9) via two primary screw conveyors (8); and the outlet end of the secondary silo (9) is respectively connected to the screw feeder (6) on the corresponding feeding port.

2. A novel TFT glass melting furnace structure according to claim 1, characterized in that: The rotational speeds of the screw feeder (6) and the corresponding first-stage screw conveyor (8) are proportionally linked and varied, so as to maintain a relatively constant level of powder temporarily stored in the second-stage silo (9).

3. The novel TFT glass melting furnace structure according to claim 1, characterized in that: The input mass ratio of the first group of feeding ports (4) to the second group of feeding ports (5) is (100:0) to (50:50).

4. The novel TFT glass melting furnace structure according to claim 1, characterized in that: The difference in the intra-group input amount between the first group of feeding ports (4) and the second group of feeding ports (5) is 0-10 Kg / h.

5. The novel TFT glass melting furnace structure according to claim 1, characterized in that: The power of the first zone electrode (3-1) is 100-170 kW, the power of the second zone electrode (3-2) is 0-10 kW lower than the power of the first zone electrode, and the gas flow rate of the burner (2) is 10-18 m³ / h.

6. The novel TFT glass melting furnace structure according to claim 1, characterized in that: There are three electrodes (3-1) in the first zone and five electrodes (3-2) in the second zone.

7. The novel TFT glass melting furnace structure according to claim 1, characterized in that: The first group of feeding openings (4) and the second group of feeding openings (5) are of the same size.

8. The novel TFT glass melting furnace structure according to claim 1, characterized in that: The spacing between adjacent electrodes in the first-zone electrode (3-1) is equal to the spacing between adjacent electrodes in the second-zone electrode (3-2).

9. The novel TFT glass melting furnace structure according to claim 8, characterized in that: The distance between two adjacent electrodes on the left and right sides of the third feeding port (5-1) and the fourth feeding port (5-2) is three times the distance between adjacent electrodes in one zone electrode (3-1).

10. The novel TFT glass melting furnace structure according to claim 1, characterized in that: The positions of the burners (2) and electrodes (3) correspond one to one on the pool furnace (1).

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