Clarification tank for borosilicate plate glass production
By designing the clarification pool to buffer the borosilicate melt flow rate and using electrode heating to release bubbles, the problem of instability of the melt pool in the production of borosilicate flat glass is solved, and the product quality and yield rate are improved.
Patent Information
- Application Number
- CN202422171714.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-05
AI Technical Summary
During the production process of existing borosilicate flat glass, changes in the production flow of the material channel lead to unstable convection of the borosilicate melt inside the melting pool and the bubble content increases, which affects product quality and yield.
A clarification pool is designed to slow down the flow rate of borosilicate melt by buffering the flow rate, and to promote bubble release by electrode heating. The top cover brick is 10mm away from the liquid surface to overflow bubbles, which has a simple structure and convenient operation.
It effectively reduces the impact of deflection of production flow in the material channel and subsequent platinum system on the melting pool, stabilizes the control of the melting pool, and improves product quality and yield.
Smart Images
Figure CN223069131U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of borosilicate flat glass production, in particular to a clarifying tank for borosilicate flat glass production. Background Art
[0002] The clarifying tank for borosilicate flat glass production is a supporting device for clarifying borosilicate flat glass liquid. Due to its excellent performance, the development of borosilicate flat glass will inevitably show high-end, diversified and green characteristics. With the continuous progress of technology and the continuous upgrading of market demand, borosilicate flat glass will become the mainstream of the high-quality development and rapid growth of the glass industry. With the continuous development of technology, the manufacturing process requirements for the clarifying tank for borosilicate flat glass production are also getting higher and higher.
[0003] There are certain drawbacks in the use of existing borosilicate flat glass production. During the production operation of the existing all-electric melting process for borosilicate flat glass, the production flow in the forehearth often deflects and the cross-sectional area of the production flow in the forehearth changes (the production flow in the forehearth changes due to process parameter changes, production specification changes, changes in the environment around the forehearth, etc.). The change of the forehearth liquid flow directly affects the convection of the borosilicate melt inside the melting tank under the conduction of the relatively narrow riser and the throat, causing an overall borosilicate glass melting failure and resulting in unstable overall melting control. At the same time, the borosilicate melt screened by the throat quickly reaches the horizontal forehearth through the riser. During this process, the glass melt quickly releases the static pressure of 2.2 m of glass melt. During the rapid rise of the borosilicate melt, the bubbles that have been absorbed by the melt overflow again due to the decrease in the melt static pressure, resulting in an increase in the microbubble content of the borosilicate melt entering the horizontal forehearth, leading to a decrease in the overall product quality and the total finished product rate, which brings certain adverse effects to the actual use process. Therefore, we propose a clarifying tank for borosilicate flat glass production. Summary of the Utility Model
[0004] Technical problems to be solved: Aiming at the deficiencies of the prior art, the utility model provides a clarifying tank for borosilicate flat glass production. By designing the clarifying tank, the flow rate of the borosilicate melt rapidly rising from the throat to the horizontal forehearth is slowed down to ensure that the bubbles generated by the change in the static pressure of the borosilicate melt are fully released. Then, through the electrode heating inside the clarifying tank, the second-layer clarification of the bubbles released inside the clarifying tank is promoted. The top cover brick is 10 mm away from the actual surface, which is convenient for the bubbles inside the clarifying tank to overflow, and can effectively solve the problems in the background art.
[0005] Technical solution: To achieve the above object, the technical solution adopted by the present utility model is as follows: A clarifying tank for the production of borosilicate flat glass includes a clarifying tank main body. A material inlet is provided at the bottom of one side of the clarifying tank main body, and a discharge port is provided at the top of the other side of the clarifying tank main body. A heat-insulating tank bottom is installed at the inner bottom of the clarifying tank main body, a heat-insulating tank wall is installed on the inner side wall of the clarifying tank main body, and a heat-insulating tank top is installed at the inner top of the clarifying tank main body. A first transition layer, a second transition layer, and a third transition layer are installed at a position below the middle in the clarifying tank main body. The heights of the first transition layer, the second transition layer, and the third transition layer increase in sequence. A first discharging mechanism is installed at the bottom of the first transition layer, a second discharging mechanism is installed at the bottom of the second transition layer, heating electrodes are installed on the inner side wall of the clarifying tank main body, and a transition platform is provided at the position of the discharge port on the clarifying tank main body.
[0006] Preferably, a hollow part is provided in the middle of the first discharging mechanism. A discharging port is provided at one end of the first discharging mechanism, and a discharging hole is provided at the other end of the first discharging mechanism. A silicon molybdenum tube is installed at the position of the discharging port, and a temperature controller is installed at the position of the discharging hole.
[0007] Preferably, a cylinder is installed on the side wall of the clarifying tank main body at a position flush with the discharge port. A telescopic rod is provided on the side of the cylinder, and a liquid discharging plate is positioned at the end of the telescopic rod.
[0008] Preferably, the first discharging mechanism is integrally formed between the discharging port, the hollow part, and the discharging hole, and the discharging port, the hollow part, and the discharging hole are integrally connected.
[0009] Preferably, the cylinder drives the telescopic rod and drives the liquid discharging plate to move telescopically, and the liquid discharging plate can extend to the position of the discharge port.
[0010] Preferably, the interior of the clarifying tank main body is fitted and positioned with the heat-insulating tank top, the heat-insulating tank wall, and the heat-insulating tank bottom. The first transition layer, the second transition layer, and the third transition layer are fixed to the bottom inside the clarifying tank main body in sequence from the inlet to the outlet.
[0011] Beneficial effects: Compared with the prior art, the present utility model provides a clarifying tank for the production of borosilicate flat glass, which has the following beneficial effects: For this clarifying tank for the production of borosilicate flat glass, by designing the clarifying tank, the flow rate of the borosilicate melt that rapidly rises from the flow hole to the horizontal channel is slowed down, ensuring that the bubbles generated by the change in the static pressure of the borosilicate melt are fully released. Then, through the electrode heating inside the clarifying tank, the release of bubbles inside the clarifying tank is promoted for secondary clarification. The top cover brick is 10 mm away from the actual surface, which is convenient for the bubbles inside the clarifying tank to overflow. The overall clarifying tank can hold nearly 10 t of borosilicate melt, which will effectively reduce the influence of the production flow deflection in the channel and the subsequent platinum system on the convection inside the melting furnace, and is beneficial to the stable control of the melting tank.
[0012] The clarifier is designed to have an upward flow for the inlet at the bottom, effectively avoiding the existence of short-circuit flow inside the clarifier and playing a role in stabilizing the clarifier as a liquid flow buffer tank.
[0013] As the borosilicate melt enters the inside of the clarifier and its speed decreases, especially for borosilicate 2.6 with a high silicon content in the formula, crystallization and deteriorated material layers are extremely likely to occur at the bottom of the clarifier, resulting in poor product quality. Therefore, a gradually ascending method is adopted at the bottom of the clarifier, which avoids the possibility of deteriorated materials at the bottom entering the production flow. At the same time, a continuous discharging method at the bottom is used to discharge the phase separation and crystallized deteriorated material layers. The structure of the clarifier for the production of borosilicate flat glass is simple, easy to operate, and has a better use effect compared with the traditional method. Description of the Drawings
[0014] Figure 1 It is a schematic diagram of the overall structure of a clarifier for the production of borosilicate flat glass according to the present utility model.
[0015] Figure 2 It is a schematic diagram of the side view structure of a clarifier for the production of borosilicate flat glass according to the present utility model.
[0016] Figure 3 It is a schematic diagram of the front view structure of a clarifier for the production of borosilicate flat glass according to the present utility model.
[0017] Figure 4 It is a schematic diagram of the structure of the discharging mechanism in a clarifier for the production of borosilicate flat glass according to the present utility model.
[0018] In the figure: 1, clarifier main body; 2, heat preservation pool wall; 3, incoming material port; 4, first transition layer; 5, first discharging mechanism; 6, heat preservation pool bottom; 7, second discharging mechanism; 8, second transition layer; 9, third transition layer; 10, transition platform; 11, discharge port; 12, heat preservation pool top; 13, liquid drainage plate; 14, telescopic rod; 15, air cylinder; 16, heating electrode; 17, hollow part; 18, discharge hole; 19, temperature controller; 20, discharging opening; 21, silicon molybdenum tube. Detailed Embodiments
[0019] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the following described embodiments are some embodiments of the present utility model, rather than all embodiments, and are only used to illustrate the present utility model and should not be construed as limiting the scope of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. For those conditions not specified in the embodiments, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. Those reagents or instruments not specified by the manufacturer can be obtained as conventional products through commercial purchase.
[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0022] Such as Figures 1-4As shown in the figure, a clarifying tank for the production of borosilicate flat glass includes a clarifying tank body 1. At the bottom on one side of the clarifying tank body 1, a raw material inlet 3 is provided. At the top on the other side of the clarifying tank body 1, a discharge port 11 is provided. At the bottom inside the clarifying tank body 1, a heat-insulating tank bottom 6 is installed. On the inner side wall of the clarifying tank body 1, a heat-insulating tank wall 2 is installed. At the top inside the clarifying tank body 1, a heat-insulating tank top 12 is installed. At a position below the middle inside the clarifying tank body 1, a first transition layer 4, a second transition layer 8 and a third transition layer 9 are installed. The heights of the first transition layer 4, the second transition layer 8 and the third transition layer 9 increase in sequence. At the bottom of the first transition layer 4, a first discharging mechanism 5 is installed. At the bottom of the second transition layer 8, a second discharging mechanism 7 is installed. On the inner side wall of the clarifying tank body 1, a heating electrode 16 is installed. At the position of the discharge port 11 on the clarifying tank body 1, a transition platform 10 is provided. By designing the clarifying tank, the flow rate of the borosilicate melt that rapidly rises from the flowing liquid hole to the horizontal channel is slowed down, ensuring that the bubbles generated by the change in the static pressure of the borosilicate melt are fully released. Then, through the electrode heating inside the clarifying tank, the bubbles released inside the clarifying tank are promoted to be clarified in two layers. The top cover brick is 10 mm away from the actual surface, which is convenient for the bubbles inside the clarifying tank to overflow.
[0023] Further, a hollow part 17 is provided in the middle of the first discharging mechanism 5. At one end of the first discharging mechanism 5, a discharging port 20 is provided. At the other end of the first discharging mechanism 5, a discharging hole 18 is provided. At the position of the discharging port 20, a silicon molybdenum tube 21 is installed. At the position of the discharging hole 18, a temperature controller 19 is installed.
[0024] Further, on the side wall of the clarifying tank body 1 at a position flush with the discharge port 11 inside, a cylinder 15 is installed. On the side of the cylinder 15, a telescopic rod 14 is provided. At the end of the telescopic rod 14, a liquid discharging plate 13 is positioned.
[0025] Further, the first discharging mechanism 5 is integrally formed with the discharging port 20, the hollow part 17 and the discharging hole 18, and the discharging port 20, the hollow part 17 and the discharging hole 18 are integrally connected.
[0026] Further, the cylinder 15 drives the telescopic rod 14 and drives the liquid discharging plate 13 to move telescopically, and the liquid discharging plate 13 can extend to the position of the discharge port 11.
[0027] Further, the inside of the clarifying tank body 1 is fitted and positioned with the heat-insulating tank top 12, the heat-insulating tank wall 2 and the heat-insulating tank bottom 6. The first transition layer 4, the second transition layer 8 and the third transition layer 9 are fixed at the bottom inside the clarifying tank body 1 in sequence from the inlet to the outlet.
[0028] Working principle: The utility model includes a clarifier main body 1, a heat preservation pool wall 2, a feed inlet 3, a first transition layer 4, a first discharging mechanism 5, a heat preservation pool bottom 6, a second discharging mechanism 7, a second transition layer 8, a third transition layer 9, a transition platform 10, a discharge outlet 11, a heat preservation pool top 12, a liquid drainage plate 13, a telescopic rod 14, a cylinder 15, a heating electrode 16, a hollow part 17, a discharge hole 18, a temperature controller 19, a discharging port 20, a silicon molybdenum tube 21. The size of the clarifier is 2000*3000*1000mm, and the area of the clarifier is 6m²
[0029] The clarifier adopts a rectangular clarifier. The front side bottom receives the incoming material from the riser. The outlet of the clarifier is the end top outlet. At the outlet of the clarifier, a transition and downward pressure method is adopted to prevent the glass liquid at the top of the clarifier from entering the production flow. The downward pressure depth is 150mm. The overall pool bottom is in three layers and gradually increases by about 100mm each time. After the increase, a 500mm transition platform is reserved, and a bottom uninterrupted automatic discharging structure is evenly arranged in the width direction on the transition platforms of the first and second elevations. The distance between the bottom of the top cover brick of the clarifier and the actual liquid level is 10mm. 4 heating electrodes and 2 temperature detection blind holes are installed on the side wall of the clarifier. Since the span of the top cover brick of the melting pool is too large, a hoisting method is adopted. The thickness of the AZS41# of the clarifier pool wall is 280mm, and the thickness of the top cover brick is 200mm and a bite joint method is adopted.
[0030] Electrode arrangement of the clarifier:
[0031] A two-layer electrode arrangement is adopted, with 2 electrodes per side wall for each layer. It is inserted horizontally. The distance between one layer of electrodes and the top end of the pool wall is 250 - 350mm (preferably 300mm) and they are evenly distributed on the clarifier pool wall. The insertion depth is 600 - 800mm (preferably 700mm, and the insertion depth can be adjusted according to the production situation). The distance between one layer of electrodes and another layer of electrodes is 550 - 650mm (preferably 600mm) and they are evenly distributed on the clarifier pool wall. The insertion depth is 600 - 800mm (preferably 700mm, and the insertion depth can be adjusted according to the production situation).
[0032] Clarifier electrode
[0033] The power supply electrode of the clarifier adopts a φ55mm molybdenum or tungsten electrode. The electrode hole of the horizontal electrode melting furnace is 66mm. A cooling water jacket is used to cool the electrode outside the melting furnace pool wall.
[0034] Clarifier power supply
[0035] The clarifier electrodes adopt a pair-wise conduction mode and are powered by a single-phase transformer. Each pair of conduction electrodes is powered by one transformer. A 120 KV*A transformer is used, and the overall transformer is a dry-type transformer with two adjustable voltage levels on the secondary side. The transformer and the corresponding layer of electrodes are connected by copper cables + bayonets. The clarifier as a whole adopts a thyristor constant-current power supply mode.
[0036] Clarifier thermal insulation
[0037] Bottom thermal insulation of the tank: Two layers of ramming materials with a thickness of 75 mm are respectively used close to the AZS41# at the bottom of the tank. One layer is ROL06C and the other layer is ROL50C. After the ramming material layer, high-quality clay insulation bricks with a thickness of 100 mm are used for insulation.
[0038] Wall thermal insulation of the tank: One layer of 50 mm ramming material layer is used close to the AZS41# on the tank wall. The material used is ROL50C. The ramming height reaches the upper edge of the tank wall bricks. Outside the ramming layer, 100 mm of clay is used for insulation.
[0039] Top thermal insulation of the clarifier: The top of the clarifier is insulated with 200 mm of high-quality clay bricks. Automatic discharging device of the clarifier
[0040] The overall automatic discharging device is made of 321 stainless steel. The part of the discharging device that extends into the discharging port and contacts the glass liquid is made of silicon molybdenum. The outer diameter of the position in contact with the glass liquid is 20 mm, and the inner diameter is tapered from 15 - 10 mm. The overall stainless steel material has a hollow structure with a diameter of 118. Cooling air or cooling water can be passed through to control the temperature of the head of the discharging device, so as to achieve the purpose of controlling the discharging amount. The discharging device and the clarifying electrode above the discharging port are connected by a single-phase connection, so as to heat the glass inside the discharging port to achieve the purpose of discharging.
[0041] It should be noted that in this article, relational terms such as first and second (No. 1, No. 2) are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.
[0042] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed.
Claims
1. A fining tank for the production of borosilicate flat glass, comprising a fining tank body (1), characterized in that: One side of the bottom of the clarifier main body (1) is provided with a feed inlet (3), the other side of the top of the clarifier main body (1) is provided with a discharge outlet (11), the inner bottom of the clarifier main body (1) is installed with a heat preservation bottom (6), the inner side wall of the clarifier main body (1) is installed with a heat preservation wall (2), the inner top of the clarifier main body (1) is installed with a heat preservation top (12), a first transition layer (4), a second transition layer (8) and a third transition layer (9) are installed at a position below the middle in the clarifier main body (1), the heights of the first transition layer (4), the second transition layer (8) and the third transition layer (9) increase in sequence, a first discharging mechanism (5) is installed at the bottom of the first transition layer (4), a second discharging mechanism (7) is installed at the bottom of the second transition layer (8), a heating electrode (16) is installed on the inner side wall of the clarifier main body (1), and a transition platform (10) is arranged at the position of the discharge outlet (11) on the clarifier main body (1).
2. The clarifying tank for producing borosilicate flat glass according to claim 1, characterized in that: A hollow part (17) is arranged in the middle of the first discharging mechanism (5), a discharge port (20) is arranged at one end of the first discharging mechanism (5), a discharge hole (18) is arranged at the other end of the first discharging mechanism (5), a silicon molybdenum tube (21) is installed at the position of the discharge port (20), and a temperature controller (19) is installed at the position of the discharge hole (18).
3. The clarifying tank for producing borosilicate flat glass according to claim 1, characterized in that: A cylinder (15) is installed on the side wall at a position flush with the discharge outlet (11) inside the clarifier main body (1), a telescopic rod (14) is arranged on the side of the cylinder (15), and a liquid discharge plate (13) is positioned at the end of the telescopic rod (14).
4. A fining tank for the production of borosilicate flat glass according to claim 2, characterized in that: The first discharging mechanism (5) is integrally formed with the discharge port (20), the hollow part (17) and the discharge hole (18), and the discharge port (20), the hollow part (17) and the discharge hole (18) are integrally communicated.
5. The clarifying tank for producing borosilicate flat glass according to claim 3, wherein: The cylinder (15) drives the telescopic rod (14) and drives the liquid discharge plate (13) to perform telescopic movement, and the liquid discharge plate (13) can extend to the position of the discharge outlet (11).
6. The clarifying tank for the production of borosilicate flat glass according to claim 1, wherein: The inside of the clarifier main body (1) is fitted and positioned with the heat preservation top (12), the heat preservation wall (2) and the heat preservation bottom (6), and the first transition layer (4), the second transition layer (8) and the third transition layer (9) are fixed at the bottom inside the clarifier main body (1) in sequence from the inlet to the outlet.