Device and method for conveying furnace-melted glass to rear end

Abstract

The present invention relates to the technical field of flat glass manufacturing, and specifically relates to a device and method for conveying furnace-melted glass to a rear end. The device for conveying furnace-melted glass to a rear end comprises a conduit structure for molten glass, a first cooling system, and / or a second cooling system, wherein the conduit structure for molten glass runs through a flow hole in a flow hole brick to form a glass melt delivery channel, and comprises at least one conduit made of platinum or a platinum alloy; the first cooling system is arranged on the inner wall of the flow hole, and is not in direct contact with the conduit structure for molten glass; and the second cooling system is arranged inside the flow hole brick. The device for conveying furnace-melted glass to a rear end of the present invention improves the effect of cooling the flow hole brick, lowers the temperature of the flow hole brick, and reduces erosion, thereby improving the quality and efficiency of glass production.

Description

An apparatus and method for conveying molten glass from a furnace to the downstream end. Technical Field

[0001] This invention belongs to the field of flat glass manufacturing technology, specifically relating to an apparatus and method for conveying molten glass to a furnace at the downstream end. Background Technology

[0002] In the manufacturing process of substrate glass, the platinum channel plays a crucial role, responsible for the precise processing and control of the glass fluid flowing from the furnace to ensure the superior quality and performance of the substrate glass. The main functions of the platinum channel encompass clarification, homogenization, temperature regulation, and flow control of the glass fluid. Clarification removes bubbles and impurities, improving glass purity; homogenization ensures a more uniform composition and guarantees stable physical and chemical properties; precise temperature control ensures suitable viscosity and flowability, facilitating subsequent molding; and flow control precisely regulates the output to meet production requirements. The conduit between the furnace and the platinum channel is a vital component connecting the two, its function being to smoothly guide the glass fluid from the furnace into the platinum channel, acting as a transition and buffer. In early furnace-platinum channel connections, simpler methods may have been used, such as directly connecting the furnace outlet with a channel built of refractory material, or using ordinary metal pipes for connection. However, these early connection methods had many problems. Ordinary refractory materials or metal pipes were prone to severe corrosion and damage under long-term high temperature and glass fluid erosion. This not only resulted in a short service life of the connection parts, requiring frequent replacement and increasing production costs, but also may affect the quality of the glass fluid and the stability of production.

[0003] With the development of glass manufacturing technology, the requirements for connecting components are becoming increasingly stringent. Platinum conduits are widely used primarily due to their superior properties. Platinum possesses extremely high chemical stability and high-temperature resistance, maintaining relative stability even under prolonged high temperatures and glass fluid corrosion. Using platinum conduits effectively reduces the degree of conduit corrosion, extends their service life, and lowers the frequency of equipment maintenance and replacement. This contributes to improved production continuity and stability, reducing production interruptions and quality fluctuations caused by conduit problems. Furthermore, platinum conduits offer better glass fluid transport performance; their relatively smooth surface reduces resistance to glass fluid flow, helping to maintain the uniformity and stability of the glass fluid composition. Simultaneously, to further improve the lifespan of the flow channel bricks, various cooling solutions are currently widely adopted. For example, air cooling systems utilize cooling air input systems and metal cooling boxes, using exhaust vents to create a large area of ​​uniform cooling air blowing across the pool walls surrounding the flow channel. Water-cooling combined with air cooling systems involves installing water cooling coils on the outer surface of the flow channel cover bricks and surrounding them with forced air cooling pipes, effectively reducing the temperature at the contact surfaces and extending the lifespan of the flow channel and even the entire kiln. Specifically, based on the erosion mechanism of flow-through bricks by glass fluid, the industry generally adopts cooling methods to suppress this erosion. The main principles are: (1) Lowering the temperature to slow down the chemical reaction. Glass fluid has a strong corrosive effect on flow-through bricks at high temperatures, involving a series of complex chemical reactions. Physical cooling can lower the surface temperature of the flow-through bricks. The lower temperature slows down the chemical reaction rate, thereby reducing the degree of chemical reaction between the glass fluid and the flow-through bricks. (2) Reducing thermal stress. Flow-through bricks will bear a large amount of thermal stress at high temperatures. When the temperature changes significantly, thermal stress may cause damage such as cracks and peeling of the bricks. Physical cooling can reduce the temperature gradient of the flow-through bricks and reduce the generation of thermal stress. In addition, the cooling system can make the surface temperature of the flow-through bricks more uniform, avoiding local overheating or undercooling. This can reduce the damage to the bricks caused by thermal stress and extend their service life. (3) Changing the physical properties of the glass fluid: Cooling can increase the viscosity of the glass fluid and reduce its fluidity. This weakens the scouring effect of the glass fluid on the flow tunnel bricks, reducing the degree of physical erosion. The higher viscosity of the glass fluid reduces the frictional force on the bricks during flow, thereby reducing wear on the brick surface. Traditional cooling methods are generally set on the outer surface of the flow tunnel bricks, including water pipes, spraying, and air blowing, but the improvement effect is generally limited. This is mainly because the bricks are thick, and the cooling effect can only reach a certain range, failing to effectively suppress excessive internal areas. Technical issues

[0004] The problem of glass fluid erosion on the flow hole bricks is due to poor cooling effect. Technical solutions

[0005] The purpose of this invention is to provide an apparatus for conveying molten glass from a kiln to the rear end, in order to solve the problem in the prior art where the molten glass bricks are eroded by the glass fluid due to poor cooling effect.

[0006] To address the aforementioned problems, this invention proposes a device for conveying molten glass from a furnace to the downstream end. The technical solution adopted is as follows:

[0007] An apparatus for conveying molten glass from a furnace to a downstream end includes: a conduit structure for molten glass, a first cooling system, and / or a second cooling system.

[0008] The conduit structure for molten glass penetrates the flow hole in the flow hole brick to form a glass fluid transport channel, and includes at least one conduit made of platinum or platinum alloy.

[0009] The first cooling system is located on the inner wall of the flow channel and does not directly contact the molten glass conduit structure;

[0010] The second cooling system is located inside the flow channel brick.

[0011] Furthermore, the first cooling system includes a cooling plate or multiple layers of cold air pipes, which are disposed in the flow hole bricks on the inner wall of the flow hole and form a flow path on both sides of the outer wall of the molten glass conduit structure.

[0012] Furthermore, the second cooling system includes a cooling plate or cooling pipe embedded inside the flow hole brick, which enables the flow hole brick to be modularly designed and to form a flow in the flow hole brick on both sides of the outer wall of the molten glass conduit structure.

[0013] Furthermore, the shape of the conduit made of platinum or platinum alloy is a corrugated tube shape, and the structural form of the corrugated tube shape includes a first corrugated tube structure and / or a second corrugated tube structure.

[0014] Furthermore, the outer contour of the first corrugated pipe structure is designed with a first crest and a first trough. The first crest is designed as a combination of a crest and a straight pipe. The relationship between the width c1 of a single first trough in the first corrugated pipe structure and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.02D < c1 < 0.04D. The relationship between the pitch p1 of adjacent first troughs in the first corrugated pipe structure and the width c1 of a single first trough is: 0.5 c1 < p1 < 2.0 c1.

[0015] Furthermore, the outer contour of the second bellows structure is designed as a second peak and a second trough. The second peak is designed as a single peak. The relationship between the width c2 of the second trough in the second bellows structure and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.02D < c2 < 0.04D. The relationship between the pitch p2 of adjacent second troughs in the second bellows structure and the width c2 of a single second trough is: p2 = c2.

[0016] Furthermore, the axial length H of the molten glass conduit structure is greater than the axial length of the flow hole, such that one end of the molten glass conduit structure into which the glass fluid flows extends out of the end of the corresponding flow hole, and the relationship between the length L of the extended portion and the axial length H of the molten glass conduit structure and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.05D < L < 0.3H.

[0017] Furthermore, a protective baffle is provided on the outer side of the end of the flow channel near the glass fluid. The protective baffle is provided along the outer peripheral surface of the molten glass conduit structure and is attached to the side wall of the flow channel brick near the glass fluid. The relationship between the distance f between the side of the protective baffle near the glass fluid and the end face of the molten glass conduit structure near the glass fluid and the length L of the protruding part is: 0.9L<f≤L.

[0018] Furthermore, an outer mating surface is provided at the end face of the molten glass conduit structure away from the glass fluid for connecting with other conduits; the outer mating surface is provided along the outer peripheral surface of the molten glass conduit structure away from the glass fluid, and in the radial direction of the conduit made of platinum or platinum alloy, the distance from the outer contour of the outer mating surface to the outer peripheral surface of the molten glass conduit structure away from the glass fluid is greater than 25mm.

[0019] The present invention also provides a method for conveying molten glass from a furnace to a downstream end, based on the above-described apparatus for conveying molten glass from a furnace to a downstream end, comprising the following steps:

[0020] S1, the first cooling system is placed on the inner wall of the flow tunnel and does not contact the molten glass conduit structure, and / or the second cooling system is placed inside the flow tunnel brick;

[0021] S2, a glass fluid transport channel is formed by passing a conduit structure through the flow hole brick to transport the molten glass;

[0022] S3, the cooling medium is introduced into the first cooling system and / or the second cooling system to form a cooling flow. Beneficial effects

[0023] This invention is an improved version. By incorporating a first cooling system on the inner wall of the flow channel, the surface of the inner pool wall is cooled, effectively reducing the temperature of the flow channel bricks, slowing down the rate of glass erosion, and extending the structural lifespan. Simultaneously, the cooling system can also regulate the temperature of the molten glass in contact with the inner wall of the flow channel bricks, improving the quality and stability of glass production. This application also includes a second cooling system installed inside the flow channel bricks, allowing the bricks to be better adapted to different temperature and erosion conditions in different areas through a segmented design. This flexible modular design improves the targetedness and effectiveness of cooling. This cooling system can directly cool the parts in contact with the glass molten glass, further enhancing the cooling effect, reducing the temperature of the flow channel bricks, minimizing erosion, and improving the quality and efficiency of glass production.

[0024] The first cooling system includes a cooling plate or multiple layers of cooling pipes. The cooling plate or multiple layers of cooling pipes are arranged in the flow hole brick on the inner wall of the flow hole and form a flow on both sides of the outer wall of the molten glass conduit structure. This directly reduces the temperature of the glass fluid transmitted to the flow hole brick, effectively reduces the temperature of the flow hole brick, slows down its resistance to glass fluid erosion, and extends the structural life.

[0025] The second cooling system includes a cooling plate or cooling pipe embedded inside the flow hole brick, which enables the flow hole brick to be modularly designed and to form a flow in the flow hole bricks on both sides of the outer wall of the molten glass conduit structure, so as to better adapt to the temperature and erosion conditions of different parts and improve the targeting and effectiveness of cooling.

[0026] The conduit made of platinum or platinum alloy is in the shape of a corrugated tube. The corrugated tube structure includes a first corrugated tube structure and / or a second corrugated tube structure. The corrugated tube structure gives the conduit made of platinum or platinum alloy higher bending strength and torsional strength. When subjected to external force, the corrugations can disperse stress and reduce local stress concentration, thereby improving the strength of the entire structure.

[0027] The outer contour of the first corrugated pipe structure is designed with a first crest and a first trough. The first crest is designed as a combination of a crest and a straight pipe. The relationship between the width c1 of a single first trough in the first corrugated pipe structure and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.02D < c1 < 0.04D. The relationship between the pitch p1 of adjacent first troughs in the first corrugated pipe structure and the width c1 of a single first trough is: 0.5 c1 < p1 < 2.0 c1. This ensures that the conduit made of platinum or platinum alloy has higher bending strength and torsional strength.

[0028] The outer contour of the second bellows structure is designed with a second crest and a second trough. The second crest is designed as a single crest. The relationship between the width c2 of the second trough and the outer diameter D of the platinum or platinum alloy conduit is: 0.02D < c2 < 0.04D. The relationship between the pitch p2 of adjacent second troughs and the width c2 of a single second trough is: p2 = c2. This second bellows structure exhibits superior resistance to external forces and also has better radial force release performance. Furthermore, the pitch of the crest and trough precisely satisfies the width c of a complete crest or trough.

[0029] The axial length H of the molten glass conduit structure is greater than the axial length of the flow cavity, such that the end of the molten glass conduit structure into which the glass fluid flows extends beyond the corresponding end of the flow cavity. The length L of the extended portion is related to the axial length H of the molten glass conduit structure and the outer diameter D of the conduit made of platinum or platinum alloy in the following ratio: 0.05D < L < 0.3H. This prevents the end of the molten glass conduit structure into which the glass fluid flows from being flush with the surface of the flow cavity brick, further reducing the erosive effect of the glass fluid on the root of the flow cavity brick.

[0030] A protective baffle is installed on the outer side of the flow channel near the glass fluid end. The protective baffle is positioned along the outer circumference of the molten glass conduit structure and adheres to the side wall of the flow channel brick near the glass fluid. The relationship between the distance f between the side of the protective baffle near the glass fluid and the end face of the molten glass conduit structure near the glass fluid end and the length L of the protruding portion is: 0.9L < f ≤ L. The protective baffle is positioned as close as possible to the inner wall of the flow channel brick to prevent the glass fluid from directly entering the gap between the conduit and the flow channel brick from behind the protective baffle, thus preventing premature erosion.

[0031] An outer mating surface is provided at the end face of the molten glass conduit structure away from the glass fluid for connecting with other conduits. The outer mating surface is arranged along the outer peripheral surface of the end of the molten glass conduit structure away from the glass fluid, and in the radial direction of the conduit made of platinum or platinum alloy, the distance from the outer contour of the outer mating surface to the outer peripheral surface of the end of the molten glass conduit structure away from the glass fluid is greater than 25mm to prevent the glass fluid from flowing out of the outer mating surface. Attached Figure Description

[0032] Figure 1 is a schematic diagram of the structure of the first cooling system in Embodiment 1 of the apparatus for conveying molten glass from a furnace to the rear end of the present invention;

[0033] Figure 2 is a schematic diagram of the second cooling system in Embodiment 1 of the apparatus for conveying molten glass from a furnace to the rear end of the present invention;

[0034] Figure 3 is a schematic diagram of the assembly dimensions in Embodiment 3 of the apparatus of the present invention for conveying molten glass to the rear of the furnace;

[0035] Figure 4 is a schematic diagram of the corrugated structure of the conduit in Embodiment 2 of the apparatus for conveying molten glass from a kiln to the rear end of the present invention.

[0036] Figure 5 is a schematic diagram of the corrugated form of the conduit in Embodiment 2 of the apparatus of the present invention for conveying molten glass in a furnace to the rear end;

[0037] Figure 6 is a schematic diagram of the erosion state of the conduit and flow hole brick without protective structure in the prior art;

[0038] Figure 7 shows the erosion state of the flow hole brick with added internal protective plate structure in Embodiment 3 of the device for conveying molten glass from the kiln to the rear end according to the present invention.

[0039] In the figure, 1. Platinum-rhodium alloy conduit; 2. Flow hole brick; 3. Outer mating surface; 4. Protective baffle; 5. First coolant inlet; 6. First coolant outlet; 7. Glass fluid; 8. Second coolant inlet; 9. Second coolant outlet; 10. First corrugated pipe structure; 11. Second corrugated pipe structure. Embodiments of the present invention

[0040] As cited in the background section, in the prior art, the poor cooling effect of the flow channel bricks leads to erosion of the flow channel bricks by the glass fluid. Therefore, the present invention provides an apparatus for conveying molten glass from a furnace to the downstream end, comprising: a conduit structure for molten glass, a first cooling system, and / or a second cooling system.

[0041] A conduit structure for molten glass, penetrating a flow hole in a flow hole brick to form a glass fluid transport channel, includes at least one conduit made of platinum or a platinum alloy for transporting the glass fluid; a first cooling system, located on the inner wall of the flow hole and not in direct contact with the conduit structure for molten glass, directly reduces the temperature of the glass fluid transported to the flow hole brick, effectively lowering the temperature of the flow hole brick, slowing down its resistance to glass fluid erosion, and extending the structural life; a second cooling system, located inside the flow hole brick, allows the flow hole brick to better adapt to the temperature and erosion conditions of different parts through a segmented design, enabling flexible modular design, improving the targeting and effectiveness of cooling. This cooling system can directly cool the parts in contact with the glass fluid, further improving the cooling effect, lowering the temperature of the flow hole brick, reducing erosion, and improving the quality and efficiency of glass production.

[0042] Specific embodiment 1 of the apparatus of the present invention for conveying molten glass from a furnace to the rear end:

[0043] In this embodiment, as shown in Figures 1 and 2, the device for conveying molten glass from the furnace to the rear includes: a molten glass conduit structure, a first cooling system, and a second cooling system. The molten glass conduit structure penetrates the flow hole in the flow hole brick 2 to form a glass fluid 7 transmission channel, and includes at least one conduit made of platinum or a platinum alloy. The first cooling system is disposed on the inner wall of the flow hole and does not directly contact the molten glass conduit structure. The second cooling system is disposed inside the flow hole brick 2.

[0044] In early platinum-free duct kilns, the flow channel bricks 2 were easily damaged due to direct erosion by the glass fluid 7. Furthermore, erosion altered the thermal conductivity of the flow channel bricks 2; the thermal conductivity of refractory materials typically changes with the degree of erosion, potentially leading to uneven temperature distribution within the kiln and affecting the glass melting and forming process. Due to the shortened lifespan, the flow channel bricks 2 required frequent replacement, increasing production costs and impacting kiln efficiency. Each replacement required machine shutdown, causing production interruptions and economic losses for the company. Therefore, this application selected a more resistant and purer precious metal material as the inner lining cavity of the flow channel, solving the problem of the refractory material channel's lack of erosion resistance to the glass fluid 7.

[0045] Specifically, the conduit made of platinum or platinum alloy contains precious metals such as platinum, palladium, rhodium, iridium, rhenium, and tantalum, and the impurities in the precious metals are less than 0.05% by mass, of which Fe is less than 0.005% and C is less than 0.005%. The cross-sectional shape of the conduit made of platinum or platinum alloy is generally circular.

[0046] In other embodiments, depending on the temperature difference requirements of the conduit made of platinum or platinum alloy, the cross-sectional shape of the conduit made of platinum or platinum alloy can be designed as a circular, elliptical, racetrack-shaped or other shape containing arc surfaces.

[0047] In this embodiment, the conduit material can be a combination of platinum and rhodium, i.e., platinum-rhodium alloy conduit 1, wherein the mass percentage of platinum is greater than 80%. When the first cooling system is used, the platinum-rhodium alloy conduit 1 and the flow channel brick 2 are assembled in a cold state. Therefore, according to the assembly and cooling requirements, an assembly gap t is reserved between the platinum-rhodium alloy conduit 1 and the flow channel brick 2, in millimeters. The assembly gap t and the outer diameter D of the platinum-rhodium alloy conduit 1 satisfy the following relationship: 0.01D < t < 0.05D, which can meet the installation and expansion requirements of the platinum-rhodium alloy conduit 1 during the heating process.

[0048] In other embodiments, the catheter can be made of platinum, i.e., the platinum material contains 100% platinum by mass.

[0049] In this embodiment, as shown in Figure 1, the first cooling system includes a cooling plate or multi-layered cooling pipes. The cooling plate or multi-layered cooling pipes are disposed within the flow hole brick 2 on the inner wall of the flow hole, forming a flow path on both sides of the outer wall of the molten glass conduit structure. This causes localized cooling of the refractory material in contact with the conduit, directly reducing the temperature of the glass fluid 7 transmitted to the flow hole brick 2. This effectively lowers the temperature of the flow hole brick 2, slows down its resistance to erosion by the glass fluid 7, and extends the structural lifespan. This cooling method is an inner pool wall surface cooling method, and the material of the cooling plate or multi-layered cooling pipes is the same platinum-rhodium alloy as the platinum-rhodium alloy conduit 1. The cooling plate or multi-layer cooling pipe includes a first coolant inlet 5 and a first coolant outlet 6. The first coolant inlet 5 is located on one side of the outer wall of the molten glass conduit structure and outside the flow hole brick 2. The first coolant outlet 6 is located on the other side of the outer wall of the molten glass conduit structure and outside the flow hole brick 2. The first coolant inlet 5 and the first coolant outlet 6 are used to allow the inflow and outflow of cooling water or cooling air, respectively, to form the flow of coolant in the cooling plate or multi-layer cooling pipe to achieve different cooling effects.

[0050] To further improve the cooling effect, as shown in Figure 2, the second cooling system includes a cooling plate or cooling pipe embedded inside the flow channel brick 2. This modular design of the flow channel brick 2 creates flow within the flow channel brick 2 on the outer wall of the molten glass conduit structure, better adapting to different temperatures and erosion conditions, and improving the targeting and effectiveness of cooling. The cooling plate or cooling pipe includes a second coolant inlet 8 and a second coolant outlet 9, located on the outside of the flow channel brick 2. The second coolant inlet 8 is located on one side of the outer wall of the molten glass conduit structure, and the second coolant outlet 9 is located on the other side. The second coolant inlet 8 and the second coolant outlet 9 are used for the inflow and outflow of cooling water or cooling air, respectively, forming a flow of coolant within the cooling plate or cooling pipe, improving the targeting and effectiveness of cooling. The internally embedded cooling structure can directly cool the parts in contact with the molten glass, further reducing the temperature of the flow channel brick 2 and minimizing erosion.

[0051] In other real-time methods, the apparatus for conveying molten glass to the back end of the furnace includes a conduit structure for molten glass and a first cooling system.

[0052] In other real-time methods, the apparatus for conveying molten glass to the back end of the furnace includes a conduit structure for molten glass and a second cooling system.

[0053] Specific embodiment 2 of the apparatus of the present invention for conveying molten glass from a furnace to the rear end:

[0054] Based on the above-described technical concept of the present invention, or based on the specific embodiments of the present invention described above, another embodiment is provided below.

[0055] The conduit is made of platinum-rhodium alloy, which significantly improves its resistance to high temperatures and corrosion. However, in high-temperature environments exceeding 1560℃, the strength of the conduit itself also needs to be improved. Therefore, the outer contour of the platinum-rhodium alloy conduit 1 was mechanically optimized by adopting a corrugated pipe structure. The corrugated shape of the conduit gives it higher bending and torsional strength. When subjected to external forces, the corrugations can disperse stress, reduce local stress concentration, and thus improve the overall structural strength. Compared with traditional straight pipes, the corrugated shape of the corrugated pipe increases the surface area of ​​the material, allowing for more uniform heat distribution and reducing the risk of local overheating. In high-temperature environments, materials undergo thermal expansion. The corrugated structure of the corrugated pipe can provide some thermal expansion compensation, reducing stress caused by thermal expansion and contraction. In addition, the elasticity of the corrugations allows the corrugated pipe to automatically adjust its shape when the temperature changes, thereby reducing the impact of thermal stress on the structure. Therefore, this invention uses this form as the main supporting strength design of the conduit.

[0056] Specifically, in this embodiment, as shown in Figure 4, the shape of the conduit made of platinum or platinum alloy is a corrugated tube shape. The corrugated tube shape includes a first corrugated tube structure 10. The corrugated tube shape gives the conduit made of platinum or platinum alloy higher bending strength and torsional strength. When subjected to external force, the corrugations can disperse stress and reduce local stress concentration, thereby improving the strength of the entire structure.

[0057] Specifically, as shown in Figure 5, the outer contour of the first corrugated pipe structure 10 is designed with a first crest and a first trough. The first crest is designed as a combination of a crest and a straight pipe. The relationship between the width c1 of a single first trough in the first corrugated pipe structure 10 and the outer diameter D of the platinum-rhodium alloy conduit 1 is: 0.02D < c1 < 0.04D. The relationship between the pitch p1 of adjacent first troughs in the first corrugated pipe structure 10 and the width c1 of a single first trough is: 0.5 c1 < p1 < 2.0 c1, ensuring that the platinum-rhodium alloy conduit 1 has higher bending strength and torsional strength.

[0058] In other embodiments, the conduit made of platinum or platinum alloy is in the shape of a bellows, and the bellows structure includes a second bellows structure 11. Specifically, the outer contour of the second bellows structure 11 is designed with a second crest and a second trough. The second crest is designed as a single crest. The relationship between the width c2 of the second trough in the second bellows structure 11 and the outer diameter D of the platinum-rhodium alloy conduit 1 is: 0.02D < c2 < 0.04D. The relationship between the pitch p2 of adjacent second troughs in the second bellows structure 11 and the width c2 of a single second trough is: p2 = c2. This second bellows structure 11 has better resistance to external forces, and it also has better radial force release performance. Furthermore, the pitch of the crest and trough exactly satisfies the width c2 of a complete crest or trough.

[0059] In other embodiments, the conduit made of platinum or platinum alloy is in the shape of a bellows, and the structural forms of the bellows shape include the first bellows structure 10 and the second bellows structure 11 described above.

[0060] Specific embodiment 3 of the apparatus of the present invention for conveying molten glass from a furnace to the rear end:

[0061] Based on the above-described technical concept of the present invention, or based on the specific embodiments of the present invention described above, another embodiment is provided below.

[0062] Based on the glass flow simulation analysis of the conduit region, in order to further reduce the erosive effect of the glass fluid 7 on the root of the flow hole brick 2, in this embodiment, as shown in Figure 3, the axial length H of the molten glass conduit structure is greater than the axial length of the flow hole, so that the end of the molten glass conduit structure into which the glass fluid 7 flows out extends beyond the end of the corresponding flow hole, avoiding the end of the molten glass conduit structure into which the glass fluid 7 flows out flush with the surface of the flow hole brick 2. Moreover, the relationship between the length L of the extended part and the axial length H of the molten glass conduit structure and the outer diameter D of the platinum-rhodium alloy conduit 1 is: 0.05D < L < 0.3H, further reducing the erosive effect of the glass fluid 7 on the root of the flow hole brick 2.

[0063] Referring to Figure 6, due to the lack of baffles at the ends of the guide tubes of the flow channel brick 2, the erosion of this area by the glass fluid 7 is very severe. Without the protection of baffles, the glass fluid 7 can directly impact the inner wall of the flow channel brick 2, causing a continuous erosion reaction on its inner surface. Specifically, the erosion mechanism of the glass fluid 7 on the kiln flow channel brick 2 mainly consists of three forms: chemical reaction erosion, physical scouring erosion, and thermal stress erosion. If the erosion of the flow channel brick 2 is not effectively controlled, the reduced thickness may eventually lead to a decrease in structural strength, potentially causing the flow channel brick 2 to crack and collapse, thus affecting the stability and lifespan of the kiln. Erosion also causes the surface of the flow channel brick 2 to become rough and uneven, affecting the local flow performance of the glass fluid 7, leading to the deterioration and expansion of local eddies in the glass fluid 7, thereby exacerbating the problem. Furthermore, the erosion of the flow channel brick 2 generates a large amount of waste residue and impurities, which may enter the glass fluid 7, affecting the purity and quality of the glass.

[0064] Therefore, in this embodiment, referring to Figures 3 and 7, a protective baffle 4 is provided on the outer side of the end of the flow channel near the glass fluid 7. The protective baffle 4 is provided along the outer peripheral surface of the molten glass conduit structure and is attached to the side wall of the flow channel brick 2 near the glass fluid 7. The relationship between the distance f between the side of the protective baffle 4 near the glass fluid 7 and the end face of the molten glass conduit structure near the glass fluid 7 and the length L of the protruding part is: 0.9L < f ≤ L. The wall thickness of the protective baffle 4 is negligible compared to the length L. The protective baffle 4 is connected to the molten glass conduit structure by welding. The above structure makes the protective baffle 4 as close as possible to the inner wall of the flow channel brick 2, avoiding the glass fluid 7 from directly entering the gap between the conduit and the flow channel brick 2 from the rear side of the protective baffle 4, thus preventing erosion problems from occurring prematurely. The protective baffle 4 forms a physical barrier on the inner wall of the flow channel brick 2, directly blocking the impact of the glass fluid 7 on the inner surface of the flow channel brick 2. During its flow, the glass fluid 7 first contacts the protective baffle 4 instead of directly impacting the flow hole brick 2. This significantly reduces the direct scouring force of the glass fluid 7 on the brick, thereby slowing down the erosion rate. Furthermore, the presence of the protective baffle 4 alters the flow path of the glass fluid 7. Upon encountering the protective baffle 4, the flow direction of the glass fluid 7 changes, dispersing and weakening some of the impact force, further reducing the corrosive effect of the glass on the flow hole brick 2. The protective baffle 4 can be circular or partially circular, elliptical or partially elliptical, rectangular, or other polygonal structures.

[0065] In other embodiments, considering the limited space between the bottom of the conduit and the bottom of the kiln pool, it can be designed as an irregular structure, that is, a straight rectangle at the bottom and a rounded rectangle or semi-circular design at the top, which can protect the surface of the flow hole brick 2 in the surrounding area of ​​the conduit to the greatest extent.

[0066] In other embodiments, the protective baffle 4 is disposed along the outer peripheral surface of the molten glass conduit structure and may not be attached to the side wall of the flow hole brick 2 near the glass fluid 7, that is, the protective baffle 4 is at a certain distance from the side wall of the flow hole brick 2 near the glass fluid 7.

[0067] In this embodiment, an outer mating surface 3 is provided at the end face of the molten glass conduit structure away from the glass fluid 7 for connecting with other conduits. The outer mating surface 3 is provided along the outer peripheral surface of the molten glass conduit structure away from the glass fluid 7, and in the radial direction of the conduit made of platinum or platinum alloy, the distance from the outer contour of the outer mating surface 3 to the outer peripheral surface of the molten glass conduit structure away from the glass fluid 7 is greater than 25 mm, preferably 30 mm.

[0068] Specific embodiment 1 of the method of the present invention for conveying molten glass to the downstream of the furnace:

[0069] In this embodiment, based on the above-described apparatus for conveying molten glass from a furnace to the downstream end, the method for conveying molten glass from a furnace to the downstream end includes the following steps:

[0070] First, the first cooling system is placed on the inner wall of the flow tunnel and does not contact the molten glass conduit structure, and / or the second cooling system is placed inside the flow tunnel brick 2;

[0071] Secondly, a glass fluid 7 transport channel is formed by passing a conduit structure through the flow hole in the flow hole brick 2 to transport the glass fluid 7.

[0072] Finally, the cooling medium is introduced into the first cooling system, and / or the second cooling system to form a cooling flow.

[0073] Specifically, the method for conveying molten glass to the downstream furnace includes the following steps:

[0074] First, a cooling plate or multi-layer cooling pipe is placed in the flow hole brick 2 on the inner wall of the flow hole, and a flow is formed on both sides of the outer wall of the molten glass conduit structure. And / or, a cooling plate or cooling pipe is embedded in the flow hole brick 2, so that the flow hole brick 2 is modularly designed and a flow is formed in the flow hole brick 2 on both sides of the outer wall of the molten glass conduit structure.

[0075] Secondly, at least one conduit made of platinum or platinum alloy is passed through the flow hole in the flow hole brick 2 to form a glass fluid 7 transport channel for transporting glass fluid 7;

[0076] Finally, cooling water or cooling air flows in and out through the first coolant inlet 5 and the first coolant outlet 6; and / or, cooling water or cooling air flows in and out through the second coolant inlet 8 and the second coolant outlet 9.

[0077] From the above description of specific embodiments of the apparatus for conveying molten glass to the downstream of a kiln according to the present invention, it can be seen that the apparatus for conveying molten glass to the downstream of a kiln according to the present invention includes: a molten glass conduit structure, a first cooling system, and / or a second cooling system. The molten glass conduit structure penetrates a flow hole in a flow hole brick to form a glass fluid transmission channel, and includes at least one conduit made of platinum or a platinum alloy for conveying glass fluid. The first cooling system is disposed on the inner wall of the flow hole and does not directly contact the molten glass conduit structure. It directly reduces the temperature of the glass fluid transmitted to the flow hole brick, effectively reducing the temperature of the flow hole brick, slowing down its resistance to glass fluid erosion, and extending the structural life. The second cooling system is disposed inside the flow hole brick, allowing the flow hole brick to better adapt to the temperature and erosion conditions of different parts through a segmented design, enabling flexible modular design, improving the targeting and effectiveness of cooling. This cooling system can directly cool the parts in contact with the glass fluid, further improving the cooling effect, reducing the temperature of the flow hole brick, reducing erosion, and improving the quality and efficiency of glass production.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. An apparatus for delivering molten glass from a furnace to a back end, comprising: include: The molten glass conduit structure, the first cooling system, and / or the second cooling system, The molten glass conduit structure axially penetrates the flow hole in the flow hole brick (2) to form a glass fluid (7) transmission channel, which includes at least one conduit made of platinum or platinum alloy; The first cooling system is located on the inner wall of the flow channel and does not directly contact the molten glass conduit structure; The second cooling system is located inside the flow hole brick (2).

2. The apparatus for delivering molten glass from a furnace to a back end as defined in claim 1, wherein, The first cooling system includes a cooling plate or a multi-layer cold air pipe, which is set in the flow hole brick (2) on the inner wall of the flow hole and forms a flow on both sides of the outer wall of the molten glass conduit structure.

3. The apparatus for delivering molten glass from a furnace to a back end as defined in claim 1, wherein, The second cooling system includes a cooling plate or cooling pipe embedded inside the flow hole brick (2), which makes the flow hole brick (2) modularly designed and forms flow in the flow hole brick (2) on both sides of the outer wall of the molten glass conduit structure.

4. The apparatus for delivering molten glass from a furnace to a back end as defined in claim 1, wherein, The conduit made of platinum or platinum alloy is in the shape of a corrugated tube, and the corrugated tube structure includes a first corrugated tube structure (10) and / or a second corrugated tube structure (11).

5. The apparatus for transferring molten glass from a furnace to a back end as claimed in claim 4, wherein, The outer contour of the first corrugated pipe structure (10) is designed as a first crest and a first trough. The first crest is designed as a combination of crest and straight pipe. The relationship between the width c1 of a single first trough in the first corrugated pipe structure (10) and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.02D < c1 < 0.04D. The relationship between the pitch p1 of adjacent first troughs in the first corrugated pipe structure (10) and the width c1 of a single first trough is: 0.5 c1 < p1 < 2.0 c1.

6. The apparatus for transferring molten glass from a furnace to a back end as defined in claim 4, wherein, The outer contour of the second bellows structure (11) is designed as a second peak and a second valley. The second peak is designed as a single peak. The relationship between the width c2 of the second valley in the second bellows structure (11) and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.02D < c2 < 0.04D. The relationship between the pitch p2 of adjacent second valleys in the second bellows structure (11) and the width c2 of a single second valley is: p2 = c2.

7. The apparatus for delivering molten glass from a furnace to a back end as defined in claim 1, wherein, The axial length H of the molten glass conduit structure is greater than the axial length of the flow hole, so that one end of the molten glass conduit structure into which the glass fluid (7) flows out extends from one end of the corresponding flow hole, and the relationship between the length L of the extended part and the axial length H of the molten glass conduit structure and the outer diameter D of the conduit made of platinum or platinum alloy is: 0.05D<L<0.3H.

8. The apparatus for transferring molten glass from a furnace to a back end as defined in claim 7, wherein, A protective baffle (4) is provided on the outer side of the end of the flow channel near the glass fluid (7). The protective baffle (4) is provided along the outer circumference of the molten glass conduit structure and is attached to the side wall of the flow channel brick (2) near the glass fluid (7). The relationship between the distance f between the side of the protective baffle (4) near the glass fluid (7) and the end face of the molten glass conduit structure near the glass fluid (7) and the length L of the protruding part is: 0.9L<f≤L.

9. The apparatus for transferring molten glass from a furnace to a back end as defined in claim 7, wherein, An outer mating surface (3) is provided at the end face of the molten glass conduit structure away from the glass fluid (7) for connecting with other conduits; the outer mating surface (3) is provided along the outer peripheral surface of the molten glass conduit structure away from the glass fluid (7), and in the radial direction of the conduit made of platinum or platinum alloy, the distance from the outer contour of the outer mating surface (3) to the outer peripheral surface of the molten glass conduit structure away from the glass fluid (7) is greater than 25 mm.

10. A method for conveying molten glass from a furnace to a downstream end, characterized in that, The apparatus for conveying molten glass to a furnace as described in any one of claims 1-9 comprises the following steps: S1, the first cooling system is set on the inner wall of the flow tunnel and does not contact the molten glass conduit structure, and / or, the second cooling system is set inside the flow tunnel brick (2); S2, the molten glass is passed through the flow hole in the flow hole brick (2) to form a glass fluid (7) transmission channel for transporting glass fluid (7). S3, the cooling medium is introduced into the first cooling system, and / or the second cooling system forms a cooling flow.

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