A glass molten metal clarification apparatus, a glass melting furnace, and a glass molten metal clarification method

Abstract

This invention provides a glass clarification device, a glass melting furnace, and a glass clarification method. The glass clarification device includes: a clarifying tube, which is horizontally arranged and has an exhaust hole on its upper side wall. A marking line is pre-set on the inner wall of the clarifying tube, and the marking line is lower than the top of the clarifying tube; an exhaust pipe, the first end of which is fixedly connected to the edge of the exhaust hole, the outer wall of the first end is not higher than the top of the clarifying tube, the upper edge of the inner wall of the first end is higher than the marking line, and the lower edge is lower than the marking line; the second end of the exhaust pipe is inclined downward and extends into the external space; a first heating circuit electrically connected to the clarifying tube; and a second heating circuit electrically connected to a heating element disposed on the outer surface of the exhaust pipe. This improves the efficiency of bubble discharge in the glass molten material, while preventing the glass molten material from condensing upon cooling in the exhaust pipe, and reducing the space occupied by the exhaust pipe.

Description

Technical Field

[0001] This invention relates to the field of glass manufacturing technology, and in particular to a glass molten metal clarification apparatus, a glass melting furnace, and a glass molten metal clarification method. Background Technology

[0002] In the glass production process, especially for high-quality substrate glass, the material needs to be melted into molten glass and then clarified in a clarifying tube to remove volatiles such as bubbles from the molten glass. After that, the clarified molten glass is discharged for the manufacture of glass products.

[0003] In related technologies, exhaust pipes generally adopt a two-section design consisting of a vertical pipe and an inclined pipe, as shown in the reference. Figures 1 to 3 As shown, the vent is located at the top of the clarifying tube and is connected to the vent via a vertical pipe. The end of the vertical pipe away from the clarifying tube is then connected to an inclined pipe. After the molten glass enters the clarifying tube, it does not completely fill the tube. The liquid level of the molten glass is a certain distance from the top of the clarifying tube, meaning there is a venting space between the molten glass and the top of the clarifying tube. During the clarification process, the bubbles inside the molten glass move upward until they burst near the liquid level. The gas inside the bursting bubbles is then discharged through the venting pipe in the venting space.

[0004] However, the gas composition in the bubbles is complex. When the molten glass first begins to clarify, the gas composition in the venting space is the same as that of the air. When the bubbles reach the vicinity of the liquid level line, the gas pressure in the venting space is different from that in the venting space, making the bubbles easier to break and escape. After the molten glass has been clarifying for a period of time, the gas composition in the venting space gradually becomes the same as that inside the bubbles, which leads to a decrease in the partial pressure inside and outside the bubbles. This reduces the success rate of the bubbles breaking when they rise to the liquid level line, thereby reducing the efficiency of bubble escaping. At the same time, there are baffles in the clarifying tube, which further block the bubbles, leading to an increase in the bubble content inside the molten glass. Ultimately, this increases the number of bubbles in the finished glass product, affecting the production yield of the glass. Summary of the Invention

[0005] The purpose of this application is to provide a glass molten metal clarification apparatus, a glass melting furnace, and a glass molten metal clarification method to solve the problem of reduced internal bubble removal efficiency during the glass molten metal clarification process, which affects the glass production yield. The specific technical solution is as follows:

[0006] A first aspect of this application provides a glass melt clarification apparatus, comprising:

[0007] A clarifying tube, which is horizontally arranged and has an exhaust hole on the upper part of its side wall, and a marking line is pre-set on the inner wall of the clarifying tube, the marking line being lower than the top of the clarifying tube;

[0008] An exhaust pipe, the first end of which is fixedly connected to the edge of the exhaust hole, the outer wall of the first end is not higher than the top of the clarifying pipe, the upper edge of the inner wall of the first end is higher than the marking line and the lower edge is lower than the marking line, and the second end of the exhaust pipe is inclined downward and extends into the external space;

[0009] The first heating circuit is electrically connected to the clarifying tube;

[0010] The second heating circuit is electrically connected to a heating element disposed on the outer surface of the exhaust pipe.

[0011] In some embodiments, the upper edge of the vent hole is tangent to the top of the clarifying tube.

[0012] In some embodiments, the clarifying tube includes an inlet end and an outlet end, and a baffle is provided on the top of the inner wall of the clarifying tube. The baffle is located on the side of the vent hole away from the inlet end, and the lower edge of the baffle is lower than the marking line. The lower edge of the baffle is perpendicular to the extension direction of the clarifying tube and parallel to the plane where the marking line is located.

[0013] In some embodiments, the lower edge of the vent is higher than the lower edge of the baffle.

[0014] In some embodiments, the horizontal distance between the center of the exhaust port and the inlet end is greater than the horizontal distance between the center of the exhaust port and the outlet end.

[0015] In some embodiments, the horizontal distance between the center of the vent hole and the baffle along the extension direction of the clarifier is 100mm-200mm.

[0016] In some embodiments, the lower edge of the vent is 5mm-20mm below the marking line.

[0017] In some embodiments, the first heating circuit includes a first temperature measuring device, a first temperature controller, a first transformer, and a first thyristor. The opposite ends of the clarifying tube are electrically connected to the secondary coil of the first transformer, the first temperature measuring device is disposed on the outer surface of the clarifying tube, and is electrically connected to the first thyristor through the first temperature controller. The first thyristor is electrically connected to the primary coil of the first transformer.

[0018] In some embodiments, the second heating circuit includes a second temperature measuring device, a second temperature controller, a second transformer, and a second thyristor. The heating element is disposed on one side of the outer surface of the exhaust pipe. Insulating refractory material is filled between the heating element and the exhaust pipe. The two ends of the heating element are electrically connected to the secondary coil of the second transformer, respectively. The second temperature measuring device is disposed on the outer surface of the exhaust pipe and electrically connected to the second thyristor through the second temperature controller. The second thyristor is electrically connected to the primary coil of the second transformer.

[0019] In some embodiments, the inlet end and the outlet end are respectively connected to an inlet pipe and an outlet pipe, the inner diameter of the inlet pipe and the outlet pipe is smaller than the inner diameter of the clarifying pipe, and the lower edge of the inner wall of the inlet pipe and the outlet pipe is flush with the lower edge of the inner wall of the clarifying pipe.

[0020] The lower edge of the baffle is lower than the upper edge of the inner wall of the outlet pipe.

[0021] In some embodiments, both the clarifier and the exhaust pipe are made of platinum.

[0022] A second aspect of this application provides a glass melting furnace, including the glass molten metal clarification apparatus described in any of the first aspects.

[0023] A third aspect of this application provides a method for clarifying molten glass, applied to the molten glass clarification apparatus described in any one of the first aspects, the method comprising:

[0024] The clarifying tube is heated to a first preset temperature using the first heating circuit, where the first preset temperature is higher than or equal to the clarifying temperature of the molten glass.

[0025] The molten glass is injected into the clarifying tube until the liquid level of the molten glass reaches the mark line. The clarifying tube and the molten glass are heated to a first preset temperature using a first heating circuit to clarify the molten glass.

[0026] The exhaust pipe is heated to a second preset temperature using the second heating circuit, the second preset temperature being greater than the melting point of the molten glass;

[0027] The molten glass at the marked line flows out of the exhaust pipe through the vent hole;

[0028] The clarified molten glass flows out from the outlet end of the clarifying tube.

[0029] Beneficial effects of the embodiments in this application:

[0030] The glass clarification apparatus, glass melting furnace, and glass clarification method provided in this application embodiment, after the glass molten enters the clarifying tube, uses the body of the clarifying tube as the heating body, and uses a first heating circuit to heat the clarifying tube to clarify the glass molten. When the liquid level of the glass molten reaches the mark line of the clarifying tube, the bubbles inside the glass molten rise to the mark line and burst when they reach the mark line. The gas is directly discharged from the exhaust pipe through the exhaust hole. The bubbles that do not burst when they reach the mark line pass below the mark line through the lower edge of the exhaust hole and the lower edge of the inner wall of the first end of the exhaust pipe. The unburdened bubbles at the mark line are discharged into the external space through the exhaust hole and the downward-sloping exhaust pipe along with the glass molten at the mark line, and no longer participate in the manufacturing of glass products. This improves the efficiency of bubble discharge in the glass molten and improves the glass production yield. At the same time, the exhaust pipe is heated by a second heating circuit so that the glass molten at the mark line can be discharged through the exhaust pipe by its own gravity, effectively avoiding the situation where the glass molten solidifies when it encounters cold inside the exhaust pipe.

[0031] In addition, the exhaust pipe adopts a single-section design, which effectively reduces the space occupied by the exhaust pipe and also reduces the pipe path, thereby lowering the cost of the glass melt exhaust device.

[0032] Of course, implementing any product or method of this application does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0034] Figure 1 This is a top perspective view of a glass melt clarification apparatus in related technologies;

[0035] Figure 2 for Figure 1 Cross-sectional view along the AA direction;

[0036] Figure 3 for Figure 1 Cross-sectional view along the BB direction;

[0037] Figure 4 This is a top perspective view of the glass melt clarification apparatus in an embodiment of this application;

[0038] Figure 5 for Figure 4 Cross-sectional view along the AA direction;

[0039] Figure 6 for Figure 4Cross-sectional view along the BB direction;

[0040] Figure 7 This is a schematic diagram of the first heating circuit in an embodiment of this application;

[0041] Figure 8 This is a schematic diagram of the second heating circuit in an embodiment of this application.

[0042] The attached diagram is labeled as follows: clarifier 1, vent 2, vent pipe 3, baffle 4, inlet pipe 5, outlet pipe 6, refractory material 7, flange 8, marking line 11, first temperature measuring device 21, first temperature controller 22, first transformer 23, first thyristor 24, heating element 31, second temperature measuring device 32, second temperature controller 33, second transformer 34, second thyristor 35, insulating refractory material 36. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0044] refer to Figures 1 to 3 As shown, the two ends of the clarifying tube 1 are connected to the inlet pipe 5 and the outlet pipe 6, respectively. The inlet pipe 5 injects molten glass into the clarifying tube 1. The clarified molten glass participates in glass production through the outlet pipe 6. An exhaust port 2 is opened at the top of the clarifying tube 1, and an exhaust pipe 3 is connected to the exhaust port 2. The exhaust pipe 3 includes a vertical pipe and an inclined pipe. After the molten glass enters the clarifying tube 1, it will not completely fill the clarifying tube 1. The molten glass level line ( Figure 2 (As shown by the dashed line) A venting space of 30mm-50mm is designed at the top of the clarifying tube 1. During the clarification process, the bubbles inside the glass melt move upward until they reach the vicinity of the liquid level line and burst. The gas inside the bubbles reaches the venting space and is then discharged through the venting pipe 3.

[0045] As bubbles in the molten glass burst in the exhaust space, gas is released into the exhaust space, compressing the air in the exhaust space and expelling it through the exhaust pipe. The gas in the exhaust space is gradually occupied by the gas in the bubbles in the molten glass, and the gas composition in the exhaust space gradually becomes the same as that in the bubbles. This leads to a decrease in the internal and external partial pressure of the bubbles, reducing the success rate of the bubbles that rise to the mark line 11 and thus reducing the efficiency of bubble discharge. At the same time, a baffle 4 is installed in the clarifying tube 1, which further blocks the bubbles. The combined effect of the rising bubbles during the clarification process and the blocking effect of the baffle 4 increases the bubble content at the liquid level line of the molten glass, ultimately increasing the number of bubble defects in the finished glass and reducing the production yield.

[0046] Based on this, refer to Figures 4 to 6 As shown, this application embodiment provides a glass liquid clarification device, including: a clarifying tube 1, which is horizontally arranged and has an exhaust hole 2 on the upper part of its side wall; a marking line 11 is preset on the inner wall of the clarifying tube 1, and the marking line 11 is lower than the top of the clarifying tube 1; an exhaust pipe 3, the first end of which is fixedly connected to the edge of the exhaust hole 2; the outer wall of the first end is not higher than the top of the clarifying tube 1; the upper edge of the inner wall of the first end is higher than the marking line 11 and the lower edge is lower than the marking line 11; the second end of the exhaust pipe 3 is inclined downward and extends into the external space; a first heating circuit is electrically connected to the clarifying tube 1; and a second heating circuit is electrically connected to a heating element 31 disposed on the outer surface of the exhaust pipe 3.

[0047] In an exemplary embodiment, the molten glass has a level line in the clarifying tube 1, and the level line is at the same height as the marker line 11.

[0048] In an exemplary embodiment, the downward-sloping exhaust pipe 3 forms an angle of 5° to 45° with the horizontal plane. For example, it can be any angle among 5°, 6°, 7°, 8°, 9°, 10°, 20°, 30°, 40°, or 45°. It should be noted that the angle of 5° to 45° between the exhaust pipe 3 and the horizontal plane is only used to describe the second end of the exhaust pipe 3 and is not a limitation on the downward-sloping angle of the exhaust pipe 3.

[0049] In an exemplary embodiment, the sidewalls of the clarifying tube 1 refer to the tube walls located on both sides of the vertical cross-section of the top and bottom of the clarifying tube 1.

[0050] In an exemplary embodiment, the distance between the marking line 11 and the top of the clarifying tube 1 can be A, and the value of A can be in the range of 40mm-50mm.

[0051] In some alternative embodiments, reference Figure 6 As shown, the first end of the exhaust pipe 3 is flush with the inner wall of the clarifier pipe 1, meaning the first end of the exhaust pipe 3 cannot extend beyond the inner wall of the clarifier pipe 1. For example, the first end of the exhaust pipe 3 can be connected to the exhaust port 2 by welding.

[0052] In an exemplary embodiment, the cross-sectional shape of the clarifying tube 1 can be circular. When the cross-sectional shape of the clarifying tube 1 is circular, the circular clarifying tube 1 is heated evenly at different positions during the clarification process of the molten glass, thereby improving the clarification efficiency of the molten glass.

[0053] In an exemplary embodiment, the lower edge of the inner wall of the first end of the exhaust pipe 3 is flush with the lower edge of the exhaust hole 2.

[0054] In this embodiment, after the molten glass enters the clarifying tube 1, the body of the clarifying tube 1 is used as the heating element. The first heating circuit heats the clarifying tube 1 to clarify the molten glass. The bubbles inside the molten glass rise to the mark line 11, that is, rise to the liquid level line of the molten glass. The bubbles that reach the mark line 11 burst, and the gas is directly discharged from the exhaust pipe 3 through the exhaust hole 2. The bubbles that do not burst at the mark line 11 pass through the lower edge of the inner wall of the first end of the exhaust pipe 3, which is lower than the mark line 11. The unburdened bubbles at the mark line 11 are discharged into the external space through the exhaust hole 2 and the downward-sloping exhaust pipe 3 along with the molten glass at the mark line 11. They no longer participate in the manufacturing of glass products, which improves the efficiency of bubble discharge in the molten glass and improves the production yield of glass. At the same time, the second heating circuit heats the exhaust pipe 3 so that the molten glass at the mark line 11 can be discharged by its own gravity through the exhaust pipe 3, which extends in a straight line. This effectively avoids the molten glass from solidifying when it encounters cold inside the exhaust pipe 3.

[0055] In addition, the exhaust pipe 3 adopts a single-section design without vertical pipes, which effectively reduces the space occupied by the exhaust pipe 3 and also reduces the pipe path of the exhaust pipe 3, thereby reducing the cost of the glass melt exhaust device.

[0056] In some embodiments, reference Figure 6 As shown, the upper edge of the vent 2 is tangent to the top of the clarifying pipe 1.

[0057] In this embodiment, the upper edge of the vent hole 2 is tangent to the top of the clarifying tube 1. The vent pipe 3 adopts a single-section design and does not have a vertical pipe, which effectively reduces the space occupied by the vent pipe 3. At the same time, it reduces the pipe path of the vent pipe 3, so that the vent hole 2 is at a higher height in the vent pipe 3, which is beneficial to increase the clarification space of the glass melt in the clarifying tube 1.

[0058] In some embodiments, reference Figure 4 , Figure 5 and Figure 6 As shown, the clarifying pipe 1 includes an inlet end and an outlet end. A baffle 4 is provided on the top of the inner wall of the clarifying pipe 1. The baffle 4 is located on the side of the exhaust hole 2 away from the inlet end, and the lower edge of the baffle 4 is lower than the marking line 11. The lower edge of the baffle 4 is perpendicular to the extension direction of the clarifying pipe 1 and parallel to the plane where the marking line 11 is located.

[0059] The molten glass flows from the inlet to the outlet, meaning the inlet is the upstream end of the molten glass and the outlet is the downstream end.

[0060] In an exemplary embodiment, the lower edge of the baffle 4 is parallel to the marking line 11 and perpendicular to the flow direction of the molten glass.

[0061] In this embodiment, during the process of clarifying the molten glass by heating the clarifying tube 1 using the first heating circuit, bubbles in the molten glass will rise to the mark line 11. At the same time, the molten glass flows from the inlet end to the outlet end. The baffle 4 set at the top of the inner wall of the clarifying tube 1 blocks the molten glass downstream of the vent hole 2 located at the mark line 11, which is conducive to the bursting of bubbles at the mark line 11. At the same time, it blocks the unburdened bubbles at the mark line 11, which is conducive to the unburdened bubbles at the mark line 11 being discharged from the vent hole 2 through the vent pipe 3 to the external space along with the molten glass at the mark line 11. This further improves the efficiency of bubble discharge in the molten glass, reduces the bubble content in the molten glass, and improves the yield of finished glass products.

[0062] In some embodiments, the lower edge of the vent 2 is higher than the lower edge of the baffle 4.

[0063] In other words, the lower edge of the inner wall of the first end of the exhaust pipe 3 is higher than the lower edge of the baffle 4.

[0064] In this embodiment, the lower edge of the vent 2 is higher than the lower edge of the baffle 4 and lower than the mark line 11. During the glass molten material clarification process, as it flows from the inlet end of the clarifying pipe 1 to the outlet end, the baffle 4 effectively blocks the glass molten material at the mark line 11. The baffle 4 prevents unbroken bubbles that rise to the mark line 11 from being discharged from the vent pipe 3 through the vent 2 along with the glass molten material at the mark line 11. This effectively prevents the glass molten material at the mark line 11 from carrying unbroken bubbles to the outlet end to participate in the production of finished glass products and affect the yield of finished glass products.

[0065] In some embodiments, reference Figure 4 and Figure 5 As shown, the horizontal distance between the center of exhaust port 2 and the inlet end is greater than the horizontal distance between the center of exhaust port 2 and the outlet end.

[0066] In this embodiment, during the clarification process of the molten glass, the first heating circuit heats the clarifying tube 1. Bubbles in the molten glass rise to the mark line 11. The center of the vent hole 2 is closer to the outlet end than the inlet end. As the molten glass flows from the inlet end to the vent hole 2, it is beneficial for the bubbles in the molten glass to rise fully to the mark line 11. The baffle 4 blocks the bubbles at the mark line 11. The bubbles burst and are discharged from the vent hole 2 through the vent pipe 3. Bubbles that rise to the mark line 11 but do not burst are discharged from the vent pipe 3 along with the molten glass at the mark line 11 through the vent hole 2, which is lower than the mark line 11, thereby improving the efficiency of bubble discharge in the molten glass.

[0067] In some embodiments, the center of the vent hole 2 is 100mm-200mm away from the horizontal distance between the baffle 4 and the extension direction of the clarifying pipe 1.

[0068] In this embodiment, the horizontal distance between the center of the vent hole 2 and the baffle 4 along the extension direction of the clarifying tube 1 is 100mm-200mm, which helps the baffle 4 to effectively block the bubbles that rise to the mark line 11.

[0069] In some embodiments, the lower edge of the vent 2 is 5mm-20mm below the marking line.

[0070] The distance C between the lower edge of the vent 2 and the marking line 11 is 5mm-20mm, for example, C can be 5mm, 10mm, 15mm, 20mm, etc. This allows unbroken air bubbles at the marking line 11 to be discharged into the external space along with the molten glass at the marking line 11 through the vent pipe 3. The unbroken air bubbles in the molten glass discharged into the external space through the vent pipe 3 will break due to partial pressure with the outside air, and the gas in the bubbles will be discharged. At the same time, the molten glass can be recycled and reused.

[0071] In this embodiment, the bubbles inside the molten glass rise to the mark line 11. The bubbles that burst at the mark line 11 are directly discharged from the vent pipe 3 through the vent hole 2. The lower edge of the vent hole 2 is 5mm-20mm below the mark line. The unburdened bubbles at the mark line 11 are discharged into the external space along with the molten glass at the mark line 11 through the vent hole 2 and the downward-sloping vent pipe 3. They no longer participate in the manufacturing of glass products. This improves the efficiency of bubble discharge from the molten glass and effectively avoids a large amount of bubble-free molten glass being discharged through the vent pipe 3, effectively ensuring the amount of molten glass that participates in the clarification process of glass production.

[0072] In an exemplary embodiment, the inner diameter of the exhaust pipe 3 can be equal to the diameter of the exhaust hole 2. The inner diameter of the exhaust pipe 3 is B, where B = A + C. That is, the inner diameter of the exhaust pipe 3 is equal to the diameter of the exhaust hole 2, which is equal to the sum of the distance from the mark line 11 to the top of the clarifying pipe 1 and the distance from which the lower edge of the exhaust hole 2 can be below the mark line 11.

[0073] The lower edge of the inner wall of the first end of the exhaust pipe 3 can also be lower than the lower edge of the exhaust hole 2 so that during the clarification process of the glass melt, the bubbles at the mark line 11 flow out of the exhaust hole 2 along with the glass melt at the mark line 11 and are smoothly discharged to the external space along the downwardly inclined exhaust pipe 3. This avoids the situation where the lower edge of the inner wall of the exhaust pipe 3 is higher than the lower edge of the exhaust hole 2, which would prevent the unbroken bubbles at the mark line 11 from being effectively discharged with the glass melt at the mark line 11, thus affecting the efficiency of glass melt bubble discharge and further affecting the yield of the finished glass product.

[0074] In some embodiments, reference Figure 7As shown, the first heating circuit includes a first temperature measuring device 21, a first temperature controller 22, a first transformer 23, and a first thyristor 24. The two ends of the clarifying tube 1 are electrically connected to the secondary coil of the first transformer 23, respectively. The first temperature measuring device 21 is disposed on the outer surface of the clarifying tube 1 and is electrically connected to the first thyristor 24 through the first temperature controller 22. The first thyristor 24 is electrically connected to the primary coil of the first transformer 23.

[0075] in, Figure 7 AC in the middle represents alternating current.

[0076] In an exemplary embodiment, the two opposite ends of the clarifying tube 1 are the inlet end and the outlet end of the clarifying tube 1, respectively.

[0077] In an exemplary embodiment, the first temperature measuring device 21 may be a thermocouple.

[0078] In an exemplary embodiment, the first temperature measuring device 21 can be welded to the outer surface of the clarifying tube 1, or arranged at a position within 20mm of the outer surface of the clarifying tube 1, which is beneficial for the first temperature measuring device 21 to effectively monitor the temperature of the clarifying tube 1.

[0079] In an exemplary embodiment, copper busbars can be fixedly connected to the opposite ends of the clarifying tube 1, and the copper busbars can be electrically connected to the secondary coil of the first transformer 23 respectively.

[0080] In an exemplary embodiment, the first temperature measuring device 21 outputs the temperature of the clarifying tube 1 in millivolt signals.

[0081] In this embodiment, the first temperature measuring device 21 monitors the temperature of the outer surface of the clarifying tube 1. The first temperature controller 22 calculates the difference between the monitored temperature of the outer surface of the clarifying tube 1 and a first preset temperature, and sends this difference signal to the first silicon controlled rectifier (SCR) 24. The first SCR 24 controls the power of the first transformer 23 according to the difference signal. For example, if the difference signal is negative, the temperature of the clarifying tube 1 is lower than the first preset temperature, which may cause the molten glass to fail to reach the clarifying temperature in the clarifying tube 1. The first temperature controller 22 sends this negative difference signal to the first SCR 24, and the first SCR 24 controls the power of the first transformer 23 to increase according to the negative difference signal, thereby heating the clarifying tube 1. The temperature of the clarifying tube 1 is brought to the first preset temperature. If the difference signal is positive, the temperature of the clarifying tube 1 is higher than the first preset temperature. The first temperature controller 22 sends the positive difference signal to the first thyristor 24. The first thyristor 24 controls the power of the first transformer 23 to decrease according to the positive difference signal, so as to keep the clarifying tube 1 at the first preset temperature, reduce the continuous heating of the clarifying tube 1, and effectively avoid waste. If the difference signal is 0, the temperature of the clarifying tube 1 is equal to the first preset temperature. The first thyristor 24 controls the power of the first transformer 23 to remain unchanged according to the 0 difference signal, so as to keep the clarifying tube 1 at the first preset temperature, and realize stable and continuous heating and clarification of the glass melt.

[0082] In an exemplary embodiment, in the design of the glass manufacturing industry, the temperature at which the glass viscosity is 200 poise is typically referred to as the refining temperature.

[0083] In an exemplary embodiment, the first heating circuit may further include a first switch, for example, the first switch may be disposed between the first temperature controller 22 and the first thyristor 24.

[0084] In some embodiments, reference Figure 8 As shown, the second heating circuit includes a second temperature measuring device 32, a second temperature controller 33, a second transformer 34, and a second thyristor 35. The heating element 31 is disposed on one side of the outer surface of the exhaust pipe 3. The space between the heating element 31 and the exhaust pipe 3 is filled with insulating refractory material 36. The two ends of the heating element 31 are electrically connected to the secondary coil of the second transformer 34. The second temperature measuring device 32 is disposed on the outer surface of the exhaust pipe 3 and is electrically connected to the second thyristor 35 through the second temperature controller 33. The second thyristor 35 is electrically connected to the primary coil of the second transformer 34.

[0085] in, Figure 8 AC in the middle represents alternating current.

[0086] In an exemplary embodiment, the space between the heating element 31 and the exhaust pipe 3 can be filled with an insulating refractory material 36. The first heating circuit uses the clarifying tube 1 as the heating body, and the exhaust pipe 3 connected to the clarifying tube 1 is energized. The insulating refractory material 36 is used to achieve insulation between the exhaust pipe 3 and the heating element 31.

[0087] In an exemplary embodiment, the distance between the heating element 31 and the exhaust pipe 3 is less than 50 mm. This effectively prevents the heating element 31 from being too far from the exhaust pipe 3, thus ensuring that heat can be effectively transferred to the exhaust pipe 3.

[0088] In an exemplary embodiment, the heating element 31 is uniformly wound around the outer surface of the insulating refractory material 36 from the first end of the exhaust pipe 3 to the second end.

[0089] In an exemplary embodiment, the second temperature measuring device 32 may also be a thermocouple.

[0090] In an exemplary embodiment, the second temperature measuring device 32 can be welded to the outer surface of the exhaust pipe 3, or the second temperature measuring device 32 can be located within 20mm of the outer surface of the exhaust pipe 3, which is beneficial for the second temperature measuring device 32 to effectively monitor the temperature of the exhaust pipe 3.

[0091] In an exemplary embodiment, the second temperature measuring device 32 outputs the temperature of the exhaust pipe 3 in millivolt signals.

[0092] In this embodiment, the second temperature measuring device 32 monitors the temperature of the exhaust pipe 3, and the second temperature controller 33 calculates the difference between the monitored temperature of the exhaust pipe 3 and the second preset temperature, and sends the difference signal to the second silicon controlled rectifier 35. The second silicon controlled rectifier 35 controls the power of the second transformer 34 according to the difference signal. For example, if the difference signal is negative, the temperature of the exhaust pipe 3 is lower than the second preset temperature, which may cause the molten glass discharged through the exhaust pipe 3 to condense inside the exhaust pipe 3. The second temperature controller 33 sends the negative difference signal to the second silicon controlled rectifier 35, and the second silicon controlled rectifier 35 controls the power of the second transformer 34 to increase according to the negative difference signal, so as to heat the exhaust pipe 3 through the heating element 31, so that the exhaust... When the temperature of the outer surface of pipe 3 reaches the second preset temperature, if the difference signal is positive, the temperature of exhaust pipe 3 is higher than the second preset temperature. The second temperature controller 33 sends the positive difference signal to the second thyristor 35. The second thyristor 35 controls the power of the second transformer 34 to decrease according to the positive difference signal, so as to maintain exhaust pipe 3 at the second preset temperature, reduce the continuous heating of exhaust pipe 3, and effectively avoid energy waste. If the difference signal is 0, the temperature of exhaust pipe 3 is equal to the second preset temperature. The second thyristor 35 controls the power of the second transformer 34 to remain unchanged according to the 0 difference signal, so as to maintain exhaust pipe 3 at the second preset temperature, effectively ensuring that the molten glass flows smoothly and is discharged from the outlet of exhaust pipe 3.

[0093] In an exemplary embodiment, the second heating circuit may further include a second switch, for example, the second switch may be disposed between the second temperature controller 33 and the second thyristor 35.

[0094] In some embodiments, reference Figures 4 to 6 As shown, the inlet end and the outlet end are respectively connected to the inlet pipe 5 and the outlet pipe 6. The inner diameter of the inlet pipe 5 and the outlet pipe 6 is smaller than the inner diameter of the clarifying pipe 1. The lower edge of the inner wall of the inlet pipe 5 and the outlet pipe 6 is flush with the lower edge of the inner wall of the clarifying pipe 1. The lower edge of the baffle 4 is lower than the upper edge of the inner wall of the outlet pipe 6.

[0095] In an exemplary embodiment, flanges 8 are provided at the inlet and outlet ends of the clarifying pipe 1, and the inlet pipe 5 and outlet pipe 6 are fixedly connected to the clarifying pipe 1 through flanges 8.

[0096] In an exemplary embodiment, the flanges 8 at opposite ends of the clarifying tube 1 can be fixedly connected with copper busbars, which are respectively connected to the secondary coil of the first transformer 23.

[0097] In this embodiment, the inner diameters of the inlet pipe 5 and the outlet pipe 6 are smaller than the inner diameter of the clarifying pipe 1. This facilitates effective control of the glass melt volume in the clarifying pipe 1 through flow control of the inlet pipe 5 and the outlet pipe 6, ensuring that the marking line 11 of the glass melt in the clarifying pipe 1 is lower than the top of the clarifying pipe 1. At the same time, the lower edge of the inner wall of the inlet pipe 5 and the outlet pipe 6 is flush with the lower edge of the inner wall of the clarifying pipe 1. With the lower edge of the baffle 4 lower than the upper edge of the inner wall of the outlet pipe 6, the baffle 4 blocks the bubbles that rise to the marking line 11 during the clarification process. This effectively prevents bubbles from flowing out with the glass melt through the outlet pipe 6 and participating in the production of finished glass products, reducing the defect rate of bubbles in the glass melt and improving the yield of finished glass products.

[0098] In some embodiments, the outer surfaces of the clarifying pipe 1, the inlet pipe 5, the outlet pipe 6, and the exhaust pipe 3 are all covered with refractory material 7, which effectively prevents the temperature of the clarifying pipe 1, the inlet pipe 5, the outlet pipe 6, and the exhaust pipe 3 from being directly exposed to the external environment, thereby reducing heat loss.

[0099] In some exemplary embodiments, the second end of the exhaust pipe 3 extends 10mm-20mm beyond the outermost edge of the refractory material 7.

[0100] In this embodiment of the application, the glass liquid at the mark line 11 can represent the glass liquid between the lower edge of the inner wall of the first end of the exhaust pipe 3 and the mark line 11.

[0101] In some embodiments, both the clarifying pipe 1 and the exhaust pipe 3 are made of platinum.

[0102] In this embodiment, both the clarifying tube 1 and the exhaust tube 3 are made of platinum. The high temperature resistance of platinum provides a high-temperature environment for the clarification of the glass melt, and at the same time, it is beneficial for the first heating circuit and the second heating circuit to heat the clarifying tube 1 and the exhaust tube 3 respectively.

[0103] For example, the clarifying tube 1 is made of platinum, and its two ends are connected to the secondary coil of the transformer. When the power of the transformer changes, the platinum clarifying tube 1 is used as a heating element to control the temperature.

[0104] Based on the same inventive concept, this application provides a glass melting furnace, including the glass molten metal clarification device described in any of the above embodiments.

[0105] Based on the same inventive concept, this application provides a method for clarifying molten glass, applied to the molten glass clarification apparatus described in any of the above embodiments, specifically including the following steps:

[0106] S10. The clarifying tube 1 is heated to a first preset temperature using the first heating circuit. The first preset temperature is higher than or equal to the clarifying temperature of the molten glass.

[0107] The clarifying tube 1 is heated to a first preset temperature using a first heating circuit, and the temperature of the clarifying tube 1 reaches at least the clarification temperature of the molten glass.

[0108] S20. Inject the molten glass into the clarifying tube 1, so that the liquid level of the molten glass reaches the mark line 11. Use the first heating circuit to heat the clarifying tube 1 and the molten glass to the first preset temperature, so that the molten glass is clarified.

[0109] During this process, molten glass can be injected from the inlet end of the clarifying tube 1 through the inlet pipe 5. During this process, the outlet pipe 6 can be closed until the surface of the molten glass reaches the mark line 11. The first heating circuit is used to maintain the clarifying tube 1 at the first preset temperature, and the bubbles inside the molten glass rise to the mark line 11 at the first preset temperature.

[0110] S30. The exhaust pipe 3 is heated to a second preset temperature using the second heating circuit. The second preset temperature is greater than the melting point of the molten glass.

[0111] S40, the molten glass at the mark line 11 flows out of the vent pipe 3 through the vent hole 2.

[0112] Since the lower edge of the vent hole 2 and the lower edge of the inner wall of the vent pipe 3 are both below the mark line 11, the bubble that rises to the mark line 11 will burst and the gas will be discharged from the vent pipe 3. If the bubble that rises to the mark line 11 does not burst, the unburdened bubble will flow out from the vent hole 2 through the vent pipe 3 along with the glass liquid at the mark line 11.

[0113] Meanwhile, during this process, the baffle 4 blocks the molten glass downstream of the vent hole 2 and the molten glass at the mark line 11, which is conducive to the bursting of the bubble at the mark line 11. At the same time, the molten glass containing the bubble at the mark line 11 is blocked, which is conducive to the bubble at the mark line 11 flowing out of the vent pipe 3 through the vent hole 2 along with the molten glass at the mark line 11.

[0114] The bubble at mark line 11 flows out of the exhaust pipe 3 along with the molten glass through the vent hole 2. The second heating circuit heats and maintains the exhaust pipe 3 at the second preset temperature to prevent the molten glass from condensing in the exhaust pipe 3 and causing blockage, which would affect the subsequent clarification of the molten glass. The end of the exhaust pipe 3 away from the vent hole 2 is tilted downward and extends into the external space, allowing the bubble at mark line 11 to flow freely out through the outlet of the exhaust pipe 3 along with the molten glass at mark line 11.

[0115] It should be noted that the bubbles flowing out with the molten glass through the exhaust pipe 3 have a partial pressure with the air in the external environment, and the bubbles can also burst. In other words, the bubble content in the molten glass discharged through the exhaust pipe 3 is also reduced, and this part of the molten glass can be recycled and reused.

[0116] S50. The clarified glass melt flows out from the outlet end of the clarifying tube 1.

[0117] The molten glass below the lower edge of the vent 2 contains virtually no bubbles or very few bubbles. After this portion of the molten glass has been clarified, it flows out from the outlet of the clarifying tube 1 for subsequent production of finished glass products.

[0118] In an exemplary embodiment, the clarification temperature of the molten glass is T, the viscosity of the molten glass is 200 poise, and the first preset temperature can be T1, where T≤T1≤T+30℃.

[0119] In some embodiments, the first preset temperature is greater than the second preset temperature.

[0120] In an exemplary embodiment, the second preset temperature can be T2, for example, T2 = T1 - 100℃.

[0121] In this embodiment, the first heating circuit heats and maintains the clarifying tube 1 at a first preset temperature to clarify the molten glass inside the clarifying tube 1. Bubbles inside the molten glass rise to the mark line 11, and the burst bubbles are discharged through the exhaust pipe 3. Unburst bubbles flow out of the exhaust pipe 3 along with the molten glass at the mark line 11. The second heating circuit heats and maintains the exhaust pipe 3 at a second preset temperature so that the molten glass discharged through the exhaust pipe 3 will not condense inside the exhaust pipe 3 due to cold, thereby blocking the exhaust pipe 3 and affecting the efficiency of the exhaust pipe 3 in discharging bubbles from the molten glass. The second preset temperature is lower than the first preset temperature and higher than the melting point of the molten glass, ensuring that the molten glass can flow freely and be discharged through the downwardly inclined exhaust pipe 3. This helps to reduce the power of the second heating circuit and save the cost of the second heating circuit.

[0122] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0123] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0124] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0125] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A glass melt clarification apparatus, characterized in that, include: A clarifying tube, which is horizontally arranged and has an exhaust hole on the upper part of its side wall; a marking line is pre-set on the inner wall of the clarifying tube, and the marking line is lower than the top of the clarifying tube. An exhaust pipe, the first end of which is fixedly connected to the edge of the exhaust hole, the outer wall of the first end is not higher than the top of the clarifying pipe, the upper edge of the inner wall of the first end is higher than the marking line and the lower edge is lower than the marking line, and the second end of the exhaust pipe is inclined downward and extends into the external space; The first heating circuit is electrically connected to the clarifying tube; The second heating circuit is electrically connected to a heating element disposed on the outer surface of the exhaust pipe.

2. The glass melt clarification apparatus according to claim 1, characterized in that, The upper edge of the vent hole is tangent to the top of the clarifying tube.

3. The glass melt clarification apparatus according to claim 1, characterized in that, The clarifying tube includes an inlet end and an outlet end. A baffle is provided on the top of the inner wall of the clarifying tube. The baffle is located on the side of the vent hole away from the inlet end, and the lower edge of the baffle is lower than the marking line. The lower edge of the baffle is perpendicular to the extension direction of the clarifying tube and parallel to the plane where the marking line is located.

4. The glass melt clarification apparatus according to claim 3, characterized in that, The lower edge of the vent is higher than the lower edge of the baffle.

5. The glass melt clarification apparatus according to claim 3, characterized in that, The horizontal distance between the center of the exhaust port and the inlet end is greater than the horizontal distance between the center of the exhaust port and the outlet end.

6. The glass melt clarification apparatus according to claim 3, characterized in that, The horizontal distance between the center of the vent hole and the baffle along the extension direction of the clarifying pipe is 100mm-200mm.

7. The glass melt clarification apparatus according to claim 1, characterized in that, The lower edge of the vent is 5mm-20mm below the marking line.

8. The glass melt clarification apparatus according to claim 1, characterized in that, The first heating circuit includes a first temperature measuring device, a first temperature controller, a first transformer, and a first thyristor. The two ends of the clarifying tube are electrically connected to the secondary coil of the first transformer. The first temperature measuring device is disposed on the outer surface of the clarifying tube and is electrically connected to the first thyristor through the first temperature controller. The first thyristor is electrically connected to the primary coil of the first transformer.

9. The glass melt clarification apparatus according to claim 1, characterized in that, The second heating circuit includes a second temperature measuring device, a second temperature controller, a second transformer, and a second thyristor. The heating element is disposed on one side of the outer surface of the exhaust pipe. Insulating refractory material is filled between the heating element and the exhaust pipe. The two ends of the heating element are electrically connected to the secondary coil of the second transformer. The second temperature measuring device is disposed on the outer surface of the exhaust pipe and is electrically connected to the second thyristor through the second temperature controller. The second thyristor is electrically connected to the primary coil of the second transformer.

10. The glass melt clarification apparatus according to claim 3, characterized in that, The inlet end and the outlet end are respectively connected to an inlet pipe and an outlet pipe. The inner diameter of the inlet pipe and the outlet pipe is smaller than the inner diameter of the clarifying pipe. The lower edge of the inner wall of the inlet pipe and the outlet pipe is flush with the lower edge of the inner wall of the clarifying pipe. The lower edge of the baffle is lower than the upper edge of the inner wall of the outlet pipe.

11. The glass melt clarification apparatus according to claim 1, characterized in that, Both the clarifier pipe and the exhaust pipe are made of platinum.

12. A glass melting furnace, characterized in that, Includes the glass melt clarification apparatus according to any one of claims 1 to 11.

13. A method for clarifying molten glass, characterized in that, The method, applied to the glass melt clarification apparatus according to any one of claims 1 to 11, comprises: The clarifying tube is heated to a first preset temperature using the first heating circuit, where the first preset temperature is higher than or equal to the clarifying temperature of the molten glass. The molten glass is injected into the clarifying tube until the liquid level of the molten glass reaches the mark line. The clarifying tube and the molten glass are heated to a first preset temperature using a first heating circuit to clarify the molten glass. The exhaust pipe is heated to a second preset temperature using the second heating circuit, the second preset temperature being greater than the melting point of the molten glass; The molten glass at the marked line flows out of the exhaust pipe through the vent hole; The clarified molten glass flows out from the outlet end of the clarifying tube.

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