A furnace for producing high quality photovoltaic glass and a novel calendering forming flow overflow

Abstract

This invention relates to a furnace for producing high-quality photovoltaic glass and a novel overflow outlet for calendering. The furnace includes a furnace pool comprising a melting section, a refining section, a necking section, and a transverse passage connected in sequence. The end of the transverse passage is directly connected to the overflow outlet. In this furnace structure, the transverse passage does not have branch passages; instead, it connects directly to the overflow outlet. This reduces the large lateral temperature difference caused by excessively long branch passages in existing technologies, resulting in low glass melt temperature at the overflow outlet and high temperature in the middle section. It also reduces flow fluctuations caused by excessive bends in the branch passages, thus helping to reduce glass bubble defects. In this furnace structure, the transverse passage is directly connected to one or more overflow outlets, resulting in a small temperature difference between the glass melts at each overflow outlet. This ensures a relatively consistent forming temperature at the calendering stage, facilitating glass forming control.

Description

Technical Field

[0001] This invention relates to the field of glass production equipment, specifically a furnace for producing high-quality photovoltaic glass and a novel calendering overflow outlet. Background Technology

[0002] Photovoltaic power generation emits only one-tenth to one-twentieth of the carbon emissions of fossil fuel power generation, making it a truly low-carbon energy source. As a crucial component of photovoltaic power generation, photovoltaic glass is undergoing continuous technological innovation in its production, improving glass quality while simultaneously reducing unit production costs. The furnace is the most critical part of photovoltaic glass production, serving as a key entry point for glass forming. It directly impacts the variety, specifications, quality, and sales grade of the glass, and ultimately determines its manufacturing cost.

[0003] According to the inventor's search, the existing technology patent CN203403003U describes an ultra-white rolled glass furnace, whose structure includes a melting section, a refining section, a neck, and a passageway; the branch passageway has four or five sections, each of which is connected to the neck via a transverse liquid flow channel. Patent CN102234172A describes an ultra-white rolled glass melting furnace, including a melting furnace, a main flow channel, a transverse flow channel, and multiple branch flow channels connected in sequence. Patent CN201704184U describes a multi-line melting furnace for ultra-white rolled glass, with at least two branch flow channels at the furnace outlet. In other words, the existing furnace structure for photovoltaic glass production sequentially includes a melting inlet, a melting section, a refining section, a neck, a transverse passageway, branch flow channels, and an overflow outlet.

[0004] The existing kilns and calender overflow outlets have the following problems:

[0005] First, there is a large temperature difference at the overflow outlets of each branch channel. The length of the aforementioned individual branch channels is too long, and the lengths of the middle branch channels and the outer branch channels are different, resulting in a large temperature difference at the outlets of each branch channel, which brings difficulties to the glass calendering process.

[0006] Secondly, there is a large temperature difference in the molten glass across the overflow outlet of the same branch channel. The total length of the horizontal and branch channels combined is too long. Since the molten glass flows from front to back, it dissipates heat more and reaches a lower temperature when in contact with the pool wall bricks on the outside of the horizontal and branch channels, while the molten glass that does not directly contact the pool wall bricks dissipates less and reaches a higher temperature. This results in the molten glass reaching the overflow outlet having a lower temperature on both sides and a higher temperature in the middle. Consequently, when the molten glass from the same branch line passes through the forming and rolling mill, the produced glass sheets have uneven thickness, with a large thickness difference that fails to meet the 0.25mm requirement standard of the photovoltaic glass industry.

[0007] Third, under the same drawing amount, the more branch channels are set, the smaller the drawing amount of each branch channel, the narrower the width of the overflow port of the calendering, the greater the edge clearing loss rate of the glass at the forming point, and the lower the yield.

[0008] Fourth, the more and longer the branch channels, the larger the lateral span and the longer the length of the factory building. This results in a greater investment in fixed assets for equipment.

[0009] Fifth, in the transverse passage, the surface flow of molten glass is from front to back, while the bottom backflow of molten glass is from back to front, such as... Figure 1 The bottom glass melt return plan shows that bubbles are easily generated at the confluence of glass melt flows from different directions. As indicated by mark 31 in the figure, the glass melt flowing straight back from the branch channel collides and merges with the glass melt flowing laterally back in the channel. Due to the different viscosities of the glass melt at this point, bubbles of varying sizes are often generated, resulting in an increased number of bubbles in the finished glass.

[0010] To continuously reduce the unit energy consumption of glass, the furnaces used in the production of photovoltaic glass are gradually developing towards larger tonnage furnaces, evolving from a 500-ton furnace with four production lines to a 1000-ton furnace with four production lines, a 1000-ton furnace with five production lines, a 1200-ton furnace with five production lines, or a 1200-ton furnace with six production lines. The width of each overflow outlet's herringbone brick is less than or equal to 3300mm, resulting in glass widths less than or equal to 3300mm. The drawing capacity of a single branch line is less than or equal to 250 tons / day. The narrower the width of the overflow outlet's herringbone brick, the greater the edge-cleaning loss rate at the forming point, and the lower the yield.

[0011] The existing glass furnace outlet overflow includes furnace outlet pool wall bricks 78, ramp bricks 71, inner tail bricks 73, and lip bricks 76. See... Figure 2 Following the direction of molten glass flow, the molten glass flows through the ramp brick, inner tail brick, and lip brick. These bricks are assembled adjacent to each other. The upper sides of these bricks have eight-shaped bricks 72, guard bricks 75, and edge-blocking bricks 77 to prevent molten glass from overflowing. Because rolling rolls in the rolled glass industry frequently suffer damage or lip bricks are corroded by molten glass, rolling rolls and lip bricks need frequent replacement. A certain amount of cooled molten glass accumulates in the gap between the lip brick and the inner tail brick. This cooled glass must be cleaned every time the lip brick is replaced. The larger the contact area between the lip brick and the inner tail brick, the more cooled glass accumulates, making the cleaning process complex. Furthermore, cleaning the cooled molten glass can damage the inner tail brick, requiring periodic replacement. Replacing the inner tail brick requires lifting the furnace's flame-blocking brick, causing flames to overflow from the furnace. Therefore, replacing the inner tail brick is extremely labor-intensive, time-consuming, and results in significant production losses.

[0012] Therefore, the existing ultra-white rolled glass furnaces and rolling forming overflow ports produce glass with uneven thickness, narrow glass sheet width (less than or equal to 3300mm), high edge cleaning loss rate, high production line investment cost, and many defects in the produced glass. At the same time, replacing the tail brick structure in the overflow port at the end of the melting furnace is time-consuming and labor-intensive, resulting in large production losses and high costs. Summary of the Invention

[0013] The purpose of this invention is to provide a furnace for producing high-quality photovoltaic glass and a novel calendering overflow outlet. The glass produced by this novel furnace has high quality, fewer bubble defects, smaller transverse temperature difference in the molten glass, higher yield, and lower cost.

[0014] The technical solution of this invention:

[0015] A novel calendering overflow outlet includes a ramp brick, a herringbone brick, an inner tail brick, an outer tail brick, a front guard brick, a rear guard brick, a lip brick, and a side retainer brick. The ramp brick, inner tail brick, outer tail brick, and lip brick are placed sequentially. The herringbone brick is placed on both sides of the ramp brick, the front guard brick is placed on both sides of the inner tail brick, the rear guard brick is placed on both sides of the outer tail brick, and the side retainer brick is placed on both sides of the lip brick.

[0016] A furnace for producing high-quality photovoltaic glass includes a furnace pool, the furnace pool comprising a melting section, a refining section, a necking section, and a transverse passage connected in sequence, the transverse passage being directly connected to an overflow port.

[0017] The overflow outlet is directly connected to the end of the horizontal passage and both side walls.

[0018] The transverse passage is directly connected to one or more overflow outlets.

[0019] The overflow outlet includes ramp bricks, herringbone bricks, inner tail bricks, outer tail bricks, front guard bricks, rear guard bricks, lip bricks, and edge bricks. A support is provided on the outside of the outlet pool wall bricks at the end of the transverse passage, and a steel plate is placed on the support. The outside of the outlet pool wall bricks is lower than the inside. From the inside to the outside, ramp bricks, inner tail bricks, and outer tail bricks are placed on the outside of the outlet pool wall bricks and on the steel plate. Herringbone bricks are placed on the inside of the outlet pool wall bricks and on both sides above the ramp bricks. Front guard bricks are placed on both sides above the inner tail bricks. Rear guard bricks are placed on both sides above the outer tail bricks. Edge bricks are placed on both sides above the lip bricks.

[0020] The narrowest point between the two herringbone bricks at the overflow outlet is widened to 1.39 times or more the existing distance between the herringbone bricks.

[0021] The width of the narrowest part of the two figure-eight bricks at the overflow outlet is greater than or equal to 4600mm, and the width of the produced glass plate is greater than or equal to 4600mm.

[0022] The traction capacity of each overflow outlet of the kiln is greater than 300 tons.

[0023] A retaining wall is installed at one-third to one-half of the distance behind the entrance of the transverse passage. The height of the retaining wall is one-tenth to one-half of the height of the side wall of the transverse passage.

[0024] The beneficial effects of this invention are:

[0025] 1. The kiln structure of the present invention does not have a branch passage behind the horizontal passage, but is directly connected to the overflow port, which reduces the liquid flow fluctuation caused by excessively long branch passages and too many bends in the prior art, thereby helping to reduce glass bubble defects.

[0026] 2. In the kiln structure of the present invention, the horizontal passage is directly connected to one or more overflow ports, the temperature difference of the glass melt at each overflow port is small, and the forming temperature at the rolling forming point is basically the same, which facilitates the control of glass rolling forming.

[0027] 3. The kiln structure of the present invention eliminates the branch passage structure behind the horizontal passage, thereby reducing the problem of high horizontal temperature of the glass liquid when flowing through the overflow port caused by the rapid cooling of the glass liquid at the edge of the pool wall bricks and the slow cooling of the glass liquid in the middle due to the long branch passage.

[0028] 4. This application places an outer tail brick outside the inner tail brick of the furnace wall. During the glass production process, the outer tail brick protects the inner tail brick. Especially when the outer tail brick is damaged in the later stages of the kiln, it can be replaced directly without replacing the inner tail brick, making replacement convenient and cost-effective.

[0029] 5. When the outer tail brick of the kiln is damaged in the later stage and the glass melt needs to be cut off, the steel gate or small hammer plate is placed directly on the inner tail brick, and the outer tail brick and lip brick are replaced together. This eliminates the need to lift the flame baffle brick at the kiln outlet, which reduces the workload of employees and saves production losses caused by the excessive time required to replace the inner tail brick.

[0030] 6. This application includes a steel plate between the lower part of the outer tail brick and the lip brick. The steel plate serves to fix the outer tail brick in place and prevent it from tilting forward. The outer tail brick is wider at the top and narrower at the bottom. The wider part at the top contacts the lip brick, while the narrower part at the bottom is suspended. This structure reduces the area of ​​cooling glass generated between the two contact points, thus reducing the workload of cleaning the cooling glass liquid when replacing the lip brick, shortening the machine changeover time, and reducing production losses.

[0031] 7. The kiln structure of this application allows the molten glass in the transverse passage to be directly drawn out through the overflow port. The transverse temperature difference of the molten glass at the overflow port is small, allowing for the production of wider glass sheets by increasing the inner width of the overflow port's herringbone brick. The smaller transverse temperature difference in the glass sheets results in more uniform glass sheet thickness compared to existing technologies. Simultaneously, the edge loss rate of the glass sheets can be further reduced, increasing the yield and thus lowering production costs. Furthermore, it allows for increased drawing capacity in subsequent rolling mills, eliminates branch passages, and reduces fixed asset investment and staffing requirements.

[0032] 8. This application provides a baffle at the position of 1 / 3 to 1 / 2 of the length of the inlet along the transverse passage to increase the longitudinal backflow of the glass and play a role in forced convection, which is conducive to saving glass energy consumption and thus reducing fuel consumption. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the horizontal and branch passages for glass melt reflux in a kiln in the prior art.

[0035] Figure 2 This is an enlarged view of the structure at the end of the kiln branch passage and the overflow outlet in the existing technology.

[0036] Figure 3 This is a top view of a furnace used for producing high-quality photovoltaic glass according to this application. (An overflow outlet is shown in the figure.)

[0037] Figure 4 for Figure 3 The image shows a side view of a furnace used for producing high-quality photovoltaic glass.

[0038] Figure 5 for Figure 3 Enlarged view of the overflow outlet of a high-quality photovoltaic glass production furnace.

[0039] Figure 6 for Figure 4 A top-down enlarged view of the overflow outlet of a high-quality photovoltaic glass production furnace.

[0040] Figure 7 This is a top view of a second embodiment of a furnace for producing high-quality photovoltaic glass according to this application.

[0041] Figure 8 This is a top view of a third embodiment of a furnace for producing high-quality photovoltaic glass according to this application.

[0042] Figure 9 This is a top view of a fourth embodiment of a furnace for producing high-quality photovoltaic glass according to this application.

[0043] Figure 10 This is a top view of a fifth embodiment of a furnace for producing high-quality photovoltaic glass according to this application.

[0044] Figure 11 This is a top view of a sixth embodiment of a furnace for producing high-quality photovoltaic glass according to this application.

[0045] Figure 12 This is a top view of a seventh embodiment of a furnace for producing high-quality photovoltaic glass according to this application.

[0046] Marked in the image:

[0047] 1. Melting section; 2. Refining section; 3. Neck; 4. Horizontal passage; 5. Regenerator; 6. Small furnace; 7. Overflow port; 8. Support; 9. Steel plate; 10. Feed port; 11. Vertical steel plate; 15. Rolling mill; 20. Sill; 71. Sloping brick; 72. Herringbone brick; 73. Inner tail brick; 74. Outer tail brick; 75. Guard brick; 76. Lip brick; 77. Edge retaining brick; 78. Pool wall brick; 79. Flame baffle brick; 751. Front guard brick; 752. Rear guard brick. Detailed Implementation

[0048] To address the deficiencies pointed out in the background art, this application is hereby made. The application will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments are illustrated. However, the invention should not be construed as limited to the embodiments set forth herein. As will be readily understood by those skilled in the art, the disclosed features of the exemplary embodiments can be combined. For the sake of brevity or clarity, well-known functions or constructions are not described in detail in this application.

[0049] The present application will now be described in detail with reference to the accompanying drawings:

[0050] like Figure 3 , Figure 4As shown, this embodiment of the invention provides an ultra-large tonnage ultra-clear glass furnace for producing high-quality photovoltaic glass, with a daily melting capacity of over 1100 tons. It includes a melting section 1, a refining section 2, a neck 3, and a transverse passage 4 connected in sequence. Heat storage chambers 5 and small furnaces 6 are arranged on both sides of the melting section 1, with the heat storage chambers 5 connected to the melting section 1 via the small furnaces. This embodiment of the invention has eight pairs of heat storage chambers 5 and small furnaces 6, but can also have nine or ten pairs, with each pair of heat storage chambers 5 and small furnaces 6 symmetrically distributed on both sides of the melting section 1. The neck 3 is directly connected to the transverse passage 4. A retaining wall 20 is provided at one-third to one-half of the entrance direction of the transverse passage. Overflow outlets 7 are directly connected to the end and both sides of the transverse passage 4. The end and both sides of the transverse passage 4 can be connected to one overflow outlet 7 or multiple overflow outlets 7. The transverse passage can be designed in a square, rectangular, cylindrical, or trumpet shape according to the calendering temperature requirements. This application does not connect to branch channels after the horizontal channel, but directly connects to the overflow port, which solves the problems in the background technology where branch channels are set up and there are multiple branch channels, resulting in large temperature differences at the glass melt outlet of each branch channel, different temperatures on both sides and in the middle of each branch channel, and defects such as air bubbles in the glass melt.

[0051] As a further optimization, specifically, such as Figure 5 , Figure 6 As shown, the overflow outlet 7 is composed of a ramp brick 71, a herringbone brick 72, an inner tail brick 73, an outer tail brick 74, a guard brick 75, a lip brick 76, and a retaining brick 77. A support 8 is provided on the outer side of the outlet pool wall brick at the end of the transverse passage. A steel plate 9 is placed on the support, and a vertical steel plate 11 is fixedly connected to the outer side of the steel plate 9. The vertical steel plate 11 is positioned between the outer tail brick and the lip brick. The outer side of the outlet pool wall brick 78 is lower than the inner side. A ramp brick 71 is placed on the outer side of the outlet pool wall brick 78 and on the steel plate 9. The inner tail brick 73 and outer tail brick 74 are placed sequentially on the outer side of the ramp brick 71. The lip brick is placed on the kiln support. Herringbone bricks 72 are placed inside the outlet pool wall brick 78 and on both sides above the ramp brick 71. Guard bricks 75 are placed on both sides above the inner tail brick 73 and outer tail brick 74. Retaining bricks 77 are placed on both sides above the lip brick 76. The main function of the herringbone brick 71, guard brick 75, and retaining brick 77 is to block the high-temperature liquid glass and prevent it from overflowing. The guard brick 75 is composed of a front guard brick 751 and a rear guard brick 752. The front guard bricks are placed on both sides of the inner tail brick 73, and the rear guard bricks are placed on both sides of the outer tail brick 74.

[0052] This application adds an outer tail brick to the outside of the existing inner tail brick, and adds a steel plate between the outer tail brick and the lip brick. The outer tail brick protects the inner tail brick and facilitates replacement. Moreover, the climbing brick is shortened to prevent it from breaking due to uneven heating and cooling when changing the machine to break the glass, thus extending its service life.

[0053] As a further optimization, to prevent molten glass from overflowing, herringbone bricks are fixedly placed on both sides of the upper part of the ramp brick, front guard bricks are fixedly placed on both sides of the upper part of the inner tail brick, rear guard bricks are fixedly placed on both sides of the upper part of the outer tail brick, and edge guard bricks are placed on the outer side of the upper part of the lip brick. The width of the herringbone brick at each overflow outlet is more than 1.39 times the existing width, and the width of the produced glass sheet is more than 1.39 times the existing width.

[0054] In this embodiment, the inner width of the narrowest part of the herringbone brick is greater than 4600mm. The inner width of the front guard brick, the rear guard brick, and the edge brick can be slightly greater than, equal to, or slightly less than the narrowest inner width of the herringbone brick (4600mm), depending on production needs. The front guard brick and the rear guard brick can also be combined into one brick.

[0055] like Figure 7 As shown, this invention provides an ultra-large tonnage ultra-clear glass furnace with a daily melting capacity of over 1100 tons, comprising a melting section, a refining section, a neck, and a transverse passage connected in sequence. A regenerator chamber and a small furnace are arranged on both sides of the melting section, with the regenerator chamber connected to the melting section via the small furnace. The neck is directly connected to the transverse passage. A retaining wall 20 is provided at the 1 / 3 to 1 / 2 inlet position of the transverse passage. The retaining wall is made of multiple bricks, with a height of one-tenth to one-half the height of the side wall bricks of the transverse passage. Two overflow outlets 7 are directly connected to the end wall of the transverse passage. The width of each overflow outlet's brick is more than 1.39 times the existing width, resulting in a glass sheet width that is more than 1.39 times the existing width.

[0056] like Figure 8 As shown, this invention provides an ultra-large tonnage ultra-white glass furnace with a daily melting capacity of over 1100 tons. The furnace structure is the same as... Figure 7 The difference lies in the addition of an overflow outlet connected to each side of the transverse passage. One overflow outlet is located on the left side of the transverse passage along the direction of the molten glass flow, and the other is on the right side. A retaining wall 20 is installed at the 1 / 3 to 1 / 2 inlet position of the transverse passage. The width of each overflow outlet's V-shaped brick is more than 1.39 times the existing width, resulting in a glass sheet width that is more than 1.39 times the existing width.

[0057] like Figure 9 As shown, this invention provides an ultra-large tonnage ultra-white glass furnace with a daily melting capacity of over 1100 tons. The furnace structure is the same as... Figure 7 Three overflow outlets are directly connected to the end wall of the pool, directly opposite the horizontal passage. A retaining wall 20 is installed at the 1 / 3 to 1 / 2 inlet position of the horizontal passage. The width of the V-shaped brick of each overflow outlet is more than 1.39 times the existing width, and the width of the produced glass sheet is more than 1.39 times the existing width.

[0058] like Figure 10 As shown, this invention provides an ultra-large tonnage ultra-white glass furnace with a daily melting capacity of over 1100 tons. The furnace structure is the same as... Figure 9 The difference is that an overflow outlet 7 is connected to each of the three directions—directly opposite the horizontal passage and on the left and right pool walls. A retaining wall 20 is installed at the 1 / 3 to 1 / 2 inlet position of the horizontal passage. The width of each overflow outlet's herringbone brick is more than 1.39 times the existing width, and the width of the produced glass sheet is more than 1.39 times the existing width.

[0059] like Figure 11 As shown, this invention provides an ultra-large tonnage ultra-white glass furnace with a daily melting capacity of over 1100 tons. The furnace structure is the same as... Figure 9 The difference is that four overflow outlets 7 are directly connected to the pool wall in the horizontal passage. A retaining wall 20 is installed at the 1 / 3 to 1 / 2 inlet position of the horizontal passage. The width of the V-shaped brick of each overflow outlet is more than 1.39 times the existing width, and the width of the produced glass sheet is more than 1.39 times the existing width.

[0060] like Figure 12 As shown, this invention provides an ultra-large tonnage ultra-white glass furnace with a daily melting capacity of over 1100 tons. The furnace structure is the same as... Figure 7 Two overflow outlets are connected to the end wall of the pool directly opposite the horizontal passage, and one overflow outlet is connected to each of the left and right sides, for a total of four overflow outlets. A retaining wall 20 is installed at the 1 / 3 to 1 / 2 inlet position of the horizontal passage. The width of the V-shaped brick of each overflow outlet is more than 1.39 times the existing width, and the width of the produced glass sheet is more than 1.39 times the existing width.

[0061] Specific work process:

[0062] like Figure 3 , Figure 4 As shown, a mixed raw material composed of low-iron silica sand, soda ash, dolomite, and limestone is conveyed to the kiln head by a belt conveyor and fed into the melting furnace through the feeding port 10 by a feeder. After being melted at high temperature, it flows through the melting section to the refining section for homogenization and clarification. The liquid glass then flows through the neck into the transverse passage, flows over the ramp bricks on the outlet pool wall, then over the inner tail brick, outer tail brick, and lip brick, and finally is pressed into shape by the upper and lower rolling rollers on the rolling mill 15.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A furnace for producing high-quality photovoltaic glass, comprising a furnace tank, characterized in that: The kiln pool includes a melting section, a clarification section, a neck section, and a horizontal passage connected in sequence. There is one horizontal passage, which directly connects to multiple overflow outlets. Each overflow outlet includes a ramp brick, a herringbone brick, an inner tail brick, an outer tail brick, a front guard brick, a rear guard brick, a lip brick, and a retaining brick. The outer tail brick is wider at the top and narrower at the bottom. A support is provided on the outer side of the outlet pool wall brick at the end of the horizontal passage. A steel plate is placed on the support, and a vertical steel plate is fixedly connected to the outer side of the steel plate. The vertical steel plate is positioned between the outer tail brick and the lip brick. The outer side of the outlet pool wall brick is lower than the inner side. From the inside out, ramp bricks, inner tail bricks, and outer tail bricks are placed on the outer side of the outlet pool wall brick and on the steel plate. The lip brick is placed on... Outside the outer tail brick, inside the outlet pool wall brick and on both sides of the climbing brick, place herringbone bricks; on both sides of the inner tail brick, place front guard bricks; on both sides of the outer tail brick, place rear guard bricks; on both sides of the lip brick, place edge-blocking bricks. Flame-blocking bricks are provided on the front guard bricks and herringbone bricks. The end of the climbing brick does not exceed the end of the flame-blocking brick. The narrowest width of the two herringbone bricks at the overflow outlet is greater than or equal to 4600mm, and the width of the produced glass plate is greater than or equal to 4600mm. A retaining wall is provided at one-third to one-half of the entrance position of the transverse passage. The height of the retaining wall is one-tenth to one-half of the height of the transverse passage pool wall brick.

2. The furnace for producing high-quality photovoltaic glass according to claim 1, characterized in that: The transverse passage ends and both side walls are directly connected to the overflow outlet.

3. The furnace for producing high-quality photovoltaic glass according to claim 1, characterized in that: The traction capacity of each overflow outlet of the kiln is greater than 300 tons.

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