An efficient clarification platinum channel and method for glass liquid of high-generation substrate glass

Abstract

An efficient clarification platinum channel and method for glass liquid of high-generation substrate glass. The clarified glass liquid enters the first clarification tube through the heating section, then flows in the first clarification tube after turning over the first inlet baffle, flows through the gap between the first scraper and the bottom of the first clarification tube, and then turns over the first outlet baffle. In this way, larger bubbles can be discharged under the action of the first inlet baffle, the first scraper and the first outlet baffle. Then the glass liquid enters the second clarification tube through the first connecting tube, then flows in the second clarification tube after turning over the second inlet baffle, flows through the gap between the second scraper and the bottom of the second clarification tube, and then turns over the second outlet baffle. In this way, smaller bubbles can be discharged under the action of the second inlet baffle, the second scraper and the second outlet baffle. Finally, under the action of the third inlet baffle and the third outlet baffle, the small bubbles that are precipitated at high temperature and not discharged are dissolved in the glass liquid again, reducing the bubble defect density of the large-flow substrate glass.

Description

Technical Field

[0001] The present invention belongs to the field of substrate glass manufacturing, and particularly relates to a platinum channel and method for efficient clarification of glass liquid of high-generation substrate glass. Background Art

[0002] During the production process of substrate glass, the batch materials need to be first melted at high temperature in a tank furnace to form glass liquid. The glass liquid then undergoes processes such as heating and clarification, and cooling and stirring in a platinum channel, so that the temperature of the glass liquid in the high-temperature state can meet the conditions required for the forming and feeding of substrate glass.

[0003] As the core basic material of the new display industry, substrate glass is currently developing towards higher generations in terms of technology trends, which will make the size of the substrate glass liquid larger and larger. However, for high-generation substrate glass products manufactured by the overflow method, compared with the production technology of low-generation substrate glass, the glass liquid flow rate has increased significantly, which puts higher requirements on the clarification ability of the platinum channel.

[0004] Clarification is one of the important technological processes in the production process of substrate glass. Its main function is to remove visible bubbles, and the bubble defects in the substrate glass under high flow rates are particularly obvious. The existence of bubble defects will affect the uniformity, light transmittance, mechanical strength, and thermal stability of high-generation substrate glass.

[0005] Therefore, with the increase in the glass liquid flow rate of high-generation substrate glass, the functions of the original clarification equipment can no longer meet the requirements for clarifying the glass liquid of substrate glass, resulting in bubble defects in the substrate glass under high flow rates, and its uniformity, light transmittance, mechanical strength, and thermal stability cannot be guaranteed. Summary of the Invention

[0006] Aiming at the problems existing in the prior art, the present invention proposes a platinum channel and method for efficient clarification of glass liquid of high-generation substrate glass, which separates the glass liquid under different defoaming processes, is conducive to the precise control of the glass liquid temperature, improves the defoaming speed and clarification efficiency, and improves the production efficiency.

[0007] The present invention is realized through the following technical solutions:

[0008] A platinum channel for efficient clarification of glass liquid of high-generation substrate glass includes a heating section, a first clarification tube, a second clarification tube, and a third clarification tube;

[0009] The outlet of the heating section is communicated with the inlet of the first clarification pipe. A first inlet baffle is provided at the inner side of the inlet of the first clarification pipe, and a first outlet baffle is provided at the inner side of the outlet of the first clarification pipe. The first inlet baffle and the first outlet baffle are higher than the upper edge of the outlet of the heating section. A first exhaust pipe is provided on the side of the first clarification pipe away from the outlet of the first outlet baffle. A first scraper is provided between the first exhaust pipe and the first outlet baffle. The first scraper is distributed downward from the top of the inner wall of the first clarification pipe. The outlet of the first clarification pipe is communicated with the inlet of the second clarification pipe through a first connecting pipe. The first outlet baffle is higher than the upper edge of the inlet of the first connecting pipe. The outlet of the second clarification pipe is communicated with the inlet of the third clarification pipe through a second connecting pipe. The outlet of the third clarification pipe is communicated with an outlet section.

[0010] A second inlet baffle is provided at the inner side of the inlet of the second clarification pipe, and a second outlet baffle is provided at the inner side of the outlet of the second clarification pipe. The second inlet baffle and the second outlet baffle are higher than the upper edge of the outlet of the first connecting pipe. The second outlet baffle is higher than the upper edge of the inlet of the second connecting pipe. A second exhaust pipe is provided on the side of the second clarification pipe away from the outlet of the second outlet baffle. A second scraper is provided between the second exhaust pipe and the second outlet baffle. The second scraper is distributed downward from the top of the inner wall of the second clarification pipe. A third inlet baffle is provided at the inner side of the inlet of the third clarification pipe, and a third outlet baffle is provided at the inner side of the outlet of the third clarification pipe. The third inlet baffle and the third outlet baffle are higher than the upper edge of the outlet of the second connecting pipe.

[0011] Preferably, the cross-sections of the first clarification pipe and the third clarification pipe are circular, and the cross-section of the second clarification pipe is a rounded rectangle, and the rounded parts are located on both sides of the rectangular part and are semi-circular.

[0012] Furthermore, the diameter of the first clarification pipe is 310 mm to 350 mm, the rectangular width of the second clarification pipe is 150 mm to 250 mm, the rectangular length is 300 mm to 500 mm, the diameter of the semi-circle is equal to the rectangular width, and the diameter of the third clarification pipe is 270 mm to 300 mm.

[0013] Preferably, the cross-sections of the first connecting pipe and the second connecting pipe are circular, and the diameters are both 200 mm to 220 mm, and the lengths of the first connecting pipe and the second connecting pipe are both 200 mm to 300 mm.

[0014] Preferably, the length of the first clarification pipe is 1550 mm to 1600 mm, the length of the second clarification pipe is 1500 mm to 1550 mm, and the length of the third clarification pipe is 1400 mm to 1500 mm.

[0015] Preferably, the upper edges of the second clarification tube and the first clarification tube are on the same horizontal line, the upper edge of the second clarification tube is higher than the upper edge of the third clarification tube, the lower edges of the third clarification tube and the first clarification tube are on the same horizontal line, and the lower edge of the second clarification tube is higher than the lower edge of the third clarification tube.

[0016] Preferably, the distance between the first inlet baffle and the inlet of the first clarification tube is 30 mm to 50 mm, the distance between the second inlet baffle and the inlet of the second clarification tube is 30 mm to 50 mm, and the distance between the third inlet baffle and the inlet of the third clarification tube is 30 mm to 50 mm;

[0017] The distance between the first outlet baffle and the outlet of the first clarification tube is 30 mm to 50 mm, the distance between the second outlet baffle and the outlet of the second clarification tube is 30 mm to 50 mm, and the distance between the third outlet baffle and the outlet of the third clarification tube is 30 mm to 50 mm;

[0018] The lower edge of the outlet of the heating section is flush with the lower edge of the inlet of the first clarification tube, the lower edge of the outlet of the first clarification tube is flush with the lower edge of the inlet of the first connecting tube, the lower edge of the outlet of the first connecting tube is flush with the lower edge of the inlet of the second clarification tube, the lower edge of the outlet of the second clarification tube is flush with the lower edge of the inlet of the second connecting tube, the lower edge of the outlet of the second connecting tube is flush with the lower edge of the inlet of the third clarification tube, the cross-section of the outlet section is circular, and the lower edge of the outlet of the third clarification tube is flush with the lower edge of the outlet section.

[0019] Furthermore, the distance from the lower end of the first scraper to the bottom of the first clarification tube is 0.55 to 0.65 times the diameter dimension of the first clarification tube, both sides of the first scraper are in contact with the inner wall of the first clarification tube, the distance from the lower end of the second scraper to the bottom of the second clarification tube is 0.55 to 0.65 times the diameter dimension of the second clarification tube, and both sides of the second scraper are in contact with the inner wall of the second clarification tube;

[0020] The first inlet baffle and the first outlet baffle have the same height, both being 0.55 to 0.6 times the diameter of the first clarification tube, both sides of the first inlet baffle and the first outlet baffle are in contact with the inner wall of the first clarification tube, the second inlet baffle and the second outlet baffle have the same height, both being 0.55 to 0.6 times the width of the second clarification tube, both sides of the second inlet baffle and the second outlet baffle are in contact with the inner wall of the second clarification tube, the third inlet baffle and the third outlet baffle have the same height, both being 0.55 to 0.6 times the diameter of the third clarification tube, both sides of the third inlet baffle and the third outlet baffle are in contact with the inner wall of the third clarification tube, the first inlet baffle, the first outlet baffle, the second inlet baffle, the second outlet baffle, the third inlet baffle and the third outlet baffle are all of arc-shaped structures and have the same radian, the radian is 0.15π to 0.2π, and the bending directions of the arcs all face the outlet section.

[0021] An efficient clarification method for the glass melt of high-generation substrate glass, based on the efficient clarification platinum channel for the glass melt of high-generation substrate glass described in any one of the above, includes the following steps:

[0022] S1. Heat the glass melt of high-generation substrate glass in the heating tube to 1600°C - 1650°C to obtain clarified glass melt. The clarified glass melt first enters the first clarification tube, then flows in the first clarification tube after passing over the first inlet baffle and encounters the blockage of the first scraper. The glass melt flows through the gap between the first scraper and the bottom of the first clarification tube, then passes over the first outlet baffle and flows into the second clarification tube through the first connecting tube. The large bubbles in the glass melt are discharged from the first exhaust pipe;

[0023] When the clarified glass melt flows in the first clarification tube, heat the first clarification tube to maintain the temperature of the glass melt at 1600°C - 1650°C;

[0024] S2. The glass melt heated in S1 passes over the second inlet baffle and flows in the second clarification tube and encounters the blockage of the second scraper. The glass melt flows through the gap between the second scraper and the bottom of the second clarification tube, then passes over the second outlet baffle and flows into the third clarification tube through the second connecting tube. The small bubbles in the glass melt are discharged from the second exhaust pipe;

[0025] When the glass melt heated in S1 flows in the second clarification tube, heat the first connecting tube and the second clarification tube to maintain the temperature of the glass melt at 1600°C - 1650°C. The liquid levels of the first clarification tube and the second clarification tube are the same and higher than the first inlet baffle, the first outlet baffle, the second inlet baffle, and the second outlet baffle;

[0026] S3. The glass melt heated in S2 passes over the third inlet baffle and flows in the third clarification tube. Heat the second connecting tube and the third clarification tube to maintain the temperature of the glass melt at 1550°C - 1600°C. The liquid level fills the third clarification tube. The glass melt then passes over the third outlet baffle and flows into the outlet section. The small bubbles not discharged in the glass melt are dissolved in the glass melt, completing the efficient clarification of the glass melt of high-generation substrate glass.

[0027] Preferably, the liquid level height in the first clarification tube is below 2 / 3 of the diameter of the first clarification tube and below 13 / 15 of the diameter of the second clarification tube.

[0028] Compared with the prior art, the present invention has the following beneficial technical effects:

[0029] The present invention relates to a high-efficiency clarification platinum channel for glass melt of high-generation substrate glass. The clarified glass melt can enter the first clarification tube through the heating section, then flow in the first clarification tube after passing over the first inlet baffle, and can flow through the gap between the first scraper and the bottom of the first clarification tube, and then pass over the first outlet baffle. In this way, under the combined action of the first inlet baffle, the first scraper and the first outlet baffle, the larger bubbles in the glass melt are discharged. The glass melt with the larger bubbles discharged enters the second clarification tube through the first connecting tube, then flows in the second clarification tube after passing over the second inlet baffle, and can flow through the gap between the second scraper and the bottom of the second clarification tube, and then pass over the second outlet baffle. In this way, under the combined action of the second inlet baffle, the second scraper and the second outlet baffle, the smaller bubbles in the glass melt are discharged. The glass melt with the bubbles preliminarily discharged can make the small bubbles that are precipitated at high temperature in the first clarification tube and the second clarification tube and not discharged dissolve in the glass melt again under the action of the third inlet baffle and the third outlet baffle. Based on Stokes' law, the present invention changes the liquid level height of the glass melt in different clarification tubes through the design of different clarification tubes, thereby shortening the bubble discharge path, realizing the discharge of smaller-diameter bubbles, and further reducing the bubble defect density of large-flow substrate glass. The present invention divides the clarification tube into a first clarification tube, a second clarification tube, a third clarification tube and corresponding connecting tubes, improves the mechanical strength and structural stability of the large-flow large-size platinum channel at high temperature, reduces the high-temperature creep deformation, and effectively extends the service life of the platinum channel.

[0030] The present invention relates to a high-efficiency clarification method for glass melt of high-generation substrate glass. Under the combined action of the first inlet baffle, the first scraper and the first outlet baffle, the larger bubbles in the clarified glass melt can be discharged from the first exhaust pipe. While the first inlet baffle and the first outlet baffle increase the residence time of the glass melt in the first clarification tube, they ensure the uniformity of the flow velocity across the section when the glass melt enters the second clarification tube. Subsequently, under the combined action of the second inlet baffle, the second scraper and the second outlet baffle, the smaller bubbles can be discharged from the second exhaust pipe. Finally, by heating the second connecting tube and the third clarification tube to maintain the temperature of the glass melt at 1550°C to 1600°C, the small bubbles that are precipitated at high temperature in the first clarification tube and the second clarification tube and not discharged dissolve in the glass melt again under the action of the third inlet baffle and the third outlet baffle, and thus the high-efficiency clarification of the glass melt of high-generation large-flow substrate glass can be completed. The present invention can realize the rapid discharge and re-dissolution of bubbles in the glass melt under large flow by setting the temperature of each clarification tube differently and designing the cross-sectional dimensions, improve the bubble discharge speed and clarification efficiency, and increase the production efficiency. Description of the Drawings

[0031] Figure 1 It is a top view of the platinum channel described in the present invention;

[0032] Figure 2Side view of the platinum channel according to the present invention;

[0033] Figure 3a is Figure 2 Schematic cross-sectional view of the first clarification tube in

[0034] Figure 3b is Figure 2 Schematic cross-sectional view of the second clarification tube in

[0035] Figure 3c is Figure 2 Schematic cross-sectional view of the third clarification tube in

[0036] Figure 4 Top view of the flow trajectory of the glass melt in the platinum channel according to the present invention.

[0037] Figure 5 Side view of the flow trajectory of the glass melt in the platinum channel according to the present invention.

[0038] Wherein: 1 - heating section, 21 - first clarification tube, 22 - second clarification tube, 23 - third clarification tube, 3 - first connecting tube, 4 - second connecting tube, 51 - first inlet baffle, 52 - second inlet baffle, 53 - third inlet baffle, 61 - first scraper, 62 - second scraper, 71 - first outlet baffle, 72 - second outlet baffle, 73 - third outlet baffle, 81 - first exhaust pipe, 82 - second exhaust pipe, and 9 - outlet section. Detailed implementation manners

[0039] The principles and specific contents of the present invention will be further described below in combination with the embodiments and the accompanying drawings. The embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0040] A platinum channel for efficient clarification of glass melt of high-generation substrate glass according to the present invention. The platinum channel mainly includes a heating tube 1, clarification tubes, and an outlet section 9. The clarification tubes are divided into three sections with different cross-sectional sizes, specifically, a first clarification tube 21, a second clarification tube 22, and a third clarification tube 23. As Figure 3a shown, the cross-section of the first clarification tube 21 is circular, as Figure 3c shown, the cross-section of the third clarification tube 23 is circular. As Figure 3b shown, the cross-section of the second clarification tube 22 is a rounded rectangle, and the rounded parts are located on both sides of the rectangular part and are semi-circular. The diameter of the first clarification tube 21 is 310 mm to 350 mm, the diameter of the third clarification tube 23 is 270 mm to 300 mm, the rectangular width of the second clarification tube 22 is 150 mm to 250 mm, and the rectangular length is 300 mm to 500 mm. The diameter of the semi-circle is equal to the rectangular width. Therefore, the efficient clarification platinum channel of the present invention can also be called a variable-diameter platinum channel.

[0041] As Figure 1 and Figure 2 shown, the outlet of the heating section 1 is communicated with the inlet of the first clarification pipe 21. The outlet of the first clarification pipe 21 is communicated with the inlet of the second clarification pipe 22 through the first connecting pipe 3. The outlet of the second clarification pipe 22 is connected with the inlet of the third clarification pipe 23 through the second connecting pipe 4, and the outlet section 9 is communicated with the outlet of the third clarification pipe 23. Then, the designs in the first clarification pipe 21, the second clarification pipe 22, and the third clarification pipe 23 are mainly described in three sections specifically.

[0042] In the first clarification pipe 21, the length of the first clarification pipe 21 is 1550 mm to 1600 mm. A first inlet baffle 51 is installed inside the inlet thereof. Specifically, the distance between the first inlet baffle 51 and the inlet of the first clarification pipe 21 is 30 mm to 50 mm. A first outlet baffle 71 is installed inside the outlet of the first clarification pipe 21. The distance between the first outlet baffle 71 and the outlet of the first clarification pipe 21 is 30 mm to 50 mm. The first inlet baffle 51 and the first outlet baffle 71 have the same height, which is higher than the upper edge of the outlet of the heating section 1, and both are 0.55 to 0.6 times the diameter of the first clarification pipe 21. Both sides of the first inlet baffle 51 and the first outlet baffle 71 are in contact with the inner wall of the first clarification pipe 21. A first exhaust pipe 81 is installed on one side of the first clarification pipe 21 away from the outlet of the first outlet baffle 71. A first scraper 61 is installed between the first exhaust pipe 81 and the first outlet baffle 71. The first scraper 61 is distributed downward from the top of the inner wall of the first clarification pipe 21. Specifically, the distance from the lower end of the first scraper 61 to the bottom of the first clarification pipe 21 is 0.55 to 0.65 times the diameter of the first clarification pipe 21, and both sides are in contact with the inner wall of the first clarification pipe 21. The first outlet baffle 71 is higher than the upper edge of the inlet of the first connecting pipe 3.

[0043] In the second clarification tube 22, the length of the second clarification tube 22 is 1500 mm to 1550 mm. A second inlet baffle 52 is installed inside the inlet thereof. Specifically, the distance between the second inlet baffle 52 and the inlet of the second clarification tube 22 is 30 mm to 50 mm. A second outlet baffle 72 is installed inside the outlet of the second clarification tube 22. The distance between the second outlet baffle 72 and the outlet of the second clarification tube 22 is 30 mm to 50 mm. The second inlet baffle 52 and the second outlet baffle 72 have the same height, which is higher than the upper edge of the outlet of the first connecting pipe 3, and both are 0.55 to 0.6 times the width of the second clarification tube 22. Both sides of the second inlet baffle 52 and the second outlet baffle 72 are in contact with the inner wall of the second clarification tube 22. The second outlet baffle 72 is higher than the upper edge of the inlet of the second connecting pipe 4. A second exhaust pipe 82 is installed on one side of the second clarification tube 22 away from the outlet of the second outlet baffle 72. A second scraper 62 is installed between the second exhaust pipe 82 and the second outlet baffle 72. The second scraper 62 is distributed downward from the top of the inner wall of the second clarification tube 22. Specifically, the distance from the lower end of the second scraper 62 to the bottom of the second clarification tube 22 is 0.55 to 0.65 times the diameter of the second clarification tube 22, and both sides thereof are in contact with the inner wall of the second clarification tube 22.

[0044] In the third clarification tube 23, the length of the third clarification tube 23 is 1400 mm to 1500 mm. A third inlet baffle 53 is installed inside the inlet thereof. Specifically, the distance between the third inlet baffle 53 and the inlet of the third clarification tube 23 is 30 mm to 50 mm. A third outlet baffle 73 is installed inside the outlet of the third clarification tube 23. The distance between the third outlet baffle 73 and the outlet of the third clarification tube 23 is 30 mm to 50 mm. The third inlet baffle 53 and the third outlet baffle 73 have the same height, and are higher than the upper edge of the outlet of the second connecting pipe 4, and are 0.55 to 0.6 times the diameter of the third clarification tube 23. Both sides of the third inlet baffle 53 and the third outlet baffle 73 are in contact with the inner wall of the third clarification tube 23. Since there is no need to remove air bubbles in the third clarification tube 23, there is no need to install an exhaust pipe and a scraper.

[0045] Specifically, the cross-sections of the first connecting pipe 3 and the first connecting pipe 4 are also of a common circular structure, with diameters both being 200 mm to 220 mm and lengths both being 200 mm to 300 mm.

[0046] In the specific spatial layout, the upper edge of the second clarification tube 22 and the upper edge of the first clarification tube 21 are on the same horizontal line, the lower edge of the third clarification tube 23 and the lower edge of the first clarification tube 21 are on the same horizontal line, the upper edge of the second clarification tube 22 is higher than the upper edge of the third clarification tube 23, and the lower edge of the second clarification tube 22 is higher than the lower edge of the third clarification tube 23. In sequence, the lower edge of the outlet of the heating section 1 and the lower edge of the inlet of the first clarification tube 21 are on the same horizontal line, the lower edge of the outlet of the first clarification tube 21 and the lower edge of the inlet of the first connecting tube 3 are on the same horizontal line, the lower edge of the outlet of the first connecting tube 3 and the lower edge of the inlet of the second clarification tube 22 are on the same horizontal line, the lower edge of the outlet of the second clarification tube 22 and the lower edge of the inlet of the second connecting tube 4 are on the same horizontal line, and the lower edge of the outlet of the second connecting tube 4 and the lower edge of the inlet of the third clarification tube 23 are on the same horizontal line. The cross-section of the outlet section 9 is also circular, and the lower edge of the outlet of the third clarification tube 23 and the lower edge of the outlet section 9 are on the same horizontal line. Additionally, as Figure 5 and Figure 4 shown, the dotted lines therein indicate the flow direction of the glass melt of the high-generation substrate glass. The glass melt of the high-generation substrate glass flows in the clarification tubes and is naturally located on the same horizontal plane as a whole. However, due to the different upper and lower position arrangements of the first clarification tube 21, the second clarification tube 22, and the third clarification tube 23, the preset liquid level heights of the first clarification tube 21, the second clarification tube 22, and the third clarification tube 23 are different: the preset liquid level height in the first clarification tube 21 is not greater than 2 / 3 of the diameter of the first clarification tube 21; the preset liquid level height in the second clarification tube 22 is not greater than 13 / 15 of the diameter of the second clarification tube 22, and no cavity is reserved in the third clarification tube 23, that is, the glass melt fills the entire third clarification tube 23. Therefore, the cross-sectional height of the reserved cavity in the first clarification tube 21 is greater than the cross-sectional height of the reserved cavity in the second clarification tube 22.

[0047] The first inlet baffle 51, the first outlet baffle 71, the second inlet baffle 52, and the second outlet baffle 72 are lower than the liquid level height. The first inlet baffle 51, the first outlet baffle 71, the second inlet baffle 52, the second outlet baffle 72, the third inlet baffle 53, and the third outlet baffle 73 are all arc-shaped structures with the same radian, which can be 0.15π - 0.2π, and the arc bending directions are all the glass melt flow direction, that is, towards the outlet section 9, which can ensure the uniformity of the glass melt flow velocity in the cross-section when the glass melt enters or exits the above-mentioned clarification tubes with different pipe diameters. The wall thickness of the second clarification tube 22 is greater than the wall thicknesses of the first clarification tube 21 and the third clarification tube 23, and they are all made of platinum-rhodium alloy. The distance between the first exhaust pipe 81 and the first scraper 61 can be 0.5 mm - 1.5 mm, and the distance between the second exhaust pipe 82 and the second scraper 62 can also be 0.5 mm - 1.5 mm.

[0048] Using the above variable-diameter platinum channel, a method for efficiently clarifying the glass melt of a high-generation substrate glass according to the present invention specifically includes the following steps:

[0049] Step 1, the glass melt of the high-generation substrate glass in the heating tube 1 is heated to the clarification temperature of 1600°C to 1650°C required for clarification by direct heating. The glass melt reaching the clarification temperature starts to enter the first clarification tube 21, and then the glass melt flows in the first clarification tube 21 after turning over the first inlet baffle 51. Immediately afterwards, it will encounter the obstruction of the first scraper 61. At this time, the glass melt flows through the gap between the first scraper 61 and the bottom of the first clarification tube 21, then turns over the first outlet baffle 71 and flows into the second clarification tube 22 through the first connecting tube 3, and the larger bubbles in the glass melt are discharged from the first exhaust pipe 81.

[0050] Through the direct heating of the first clarification tube 21, the temperature of the glass melt in the first clarification tube 21 is maintained at 1600°C to 1650°C without change. The main purpose of the first inlet baffle 51 and the first outlet baffle 71 is to increase the residence time of the glass melt in the first clarification tube 21 while ensuring the uniformity of the flow velocity of the glass melt in the cross-section when it enters the subsequent second clarification tube 22.

[0051] Step 2, after the glass melt flowing out of the first clarification tube 21 enters the second clarification tube 22 through the first connecting tube 3, the glass melt flows in the second clarification tube 22 after turning over the second inlet baffle 52. Immediately afterwards, it will encounter the obstruction of the second scraper 62. At this time, the glass melt flows through the gap between the second scraper 62 and the bottom of the second clarification tube 22. The glass melt then turns over the second outlet baffle 72 and flows into the third clarification tube 23 through the second connecting tube 4, and the smaller bubbles in the glass melt are discharged from the second exhaust pipe 82. And through the direct heating of the first connecting tube 3 and the second clarification tube 22, the clarification temperature of the glass melt in the second clarification tube 22 is maintained at 1600°C to 1650°C without change;

[0052] Step 3, after the glass melt flowing out of the second clarification tube 22 enters the third clarification tube 23 through the second connecting tube 4, the glass melt flows in the third clarification tube 23 after turning over the third inlet baffle 53, and then turns over the third outlet baffle 73 and flows into the outlet section 9. The glass melt fills the entire third clarification tube 23, and through the direct heating of the second connecting tube 4 and the third clarification tube 23, the clarification temperature of the glass melt in the third clarification tube 23 is maintained at 1550°C to 1600°C, so that the small bubbles that are precipitated at high temperature in the glass melt in the first clarification tube 21 and the second clarification tube 22 and have not been discharged are dissolved in the glass melt again, that is, the efficient clarification of the glass melt of the high-generation large-flow substrate glass is completed.

Claims

1. An efficient clarification platinum channel for glass melt of high-generation substrate glass, Characterized in that, It includes a heating section (1), a first clarification tube (21), a second clarification tube (22) and a third clarification tube (23); The outlet of the heating section (1) is communicated with the inlet of the first clarification tube (21). A first inlet baffle (51) is provided inside the inlet of the first clarification tube (21). A first outlet baffle (71) is provided inside the outlet of the first clarification tube (21). The first inlet baffle (51) and the first outlet baffle (71) are higher than the upper edge of the outlet of the heating section (1). A first exhaust pipe (81) is provided on the outlet side of the first clarification tube (21) away from the first outlet baffle (71). A first scraper (61) is provided between the first exhaust pipe (81) and the first outlet baffle (71). The first scraper (61) is distributed downward from the top of the inner wall of the first clarification tube (21). The outlet of the first clarification tube (21) is communicated with the inlet of the second clarification tube (22) through a first connecting pipe (3). The first outlet baffle (71) is higher than the upper edge of the inlet of the first connecting pipe (3). The outlet of the second clarification tube (22) is communicated with the inlet of the third clarification tube (23) through a second connecting pipe (4). An outlet section (9) is communicated with the outlet of the third clarification tube (23); A second inlet baffle (52) is provided inside the inlet of the second clarification tube (22). A second outlet baffle (72) is provided inside the outlet of the second clarification tube (22). The second inlet baffle (52) and the second outlet baffle (72) are higher than the upper edge of the outlet of the first connecting pipe (3). The second outlet baffle (72) is higher than the upper edge of the inlet of the second connecting pipe (4). A second exhaust pipe (82) is provided on the outlet side of the second clarification tube (22) away from the second outlet baffle (72). A second scraper (62) is provided between the second exhaust pipe (82) and the second outlet baffle (72). The second scraper (62) is distributed downward from the top of the inner wall of the second clarification tube (22). A third inlet baffle (53) is provided inside the inlet of the third clarification tube (23). A third outlet baffle (73) is provided inside the outlet of the third clarification tube (23). The third inlet baffle (53) and the third outlet baffle (73) are higher than the upper edge of the outlet of the second connecting pipe (4); The cross-sections of the first clarification tube (21) and the third clarification tube (23) are circular. The cross-section of the second clarification tube (22) is a rounded rectangle. The rounded parts are located on both sides of the rectangular part and are semi-circular. The upper edges of the second clarification tube (22) and the first clarification tube (21) are on the same horizontal line. The upper edge of the second clarification tube (22) is higher than the upper edge of the third clarification tube (23). The lower edges of the third clarification tube (23) and the first clarification tube (21) are on the same horizontal line. The lower edge of the second clarification tube (22) is higher than the lower edge of the third clarification tube (23).

2. The efficient clarification platinum channel for glass melt of high-generation substrate glass according to claim 1, Characterized in that, The diameter of the first clarification tube (21) is 310 mm 350 mm, the rectangular width of the second clarification tube (22) is 150 mm 250 mm, and the rectangular length is 300 mm 500 mm. The semi - circular diameter is equal to the rectangular width, and the diameter of the third clarification tube (23) is 270 mm 300 mm.

3. The efficient clarification platinum channel for glass melt of high-generation substrate glass according to claim 1, Characterized in that, The cross-sections of the first connecting pipe (3) and the second connecting pipe (4) are circular, and their diameters are both 200 mm 220 mm, and the lengths of the first connecting pipe (3) and the second connecting pipe (4) are both 200 mm 300 mm 4. The high-efficiency glass melt clarification platinum channel for high-generation substrate glass according to claim 1, characterized in that, The length of the first clarification tube (21) is 1550 mm 1600 mm, and the length of the second clarification tube (22) is 1500 mm 1550 mm, and the length of the third clarification tube (23) is 1400 mm 1500 mm.

5. The high-efficiency glass melt clarification platinum channel for high-generation substrate glass according to claim 1, characterized in that, The distance between the first inlet baffle (51) and the inlet of the first clarification tube (21) is 30 mm 50 mm, and the distance between the second inlet baffle (52) and the inlet of the second clarification tube (22) is 30 mm 50 mm, and the distance between the third inlet baffle (53) and the inlet of the third clarification tube (23) is 30 mm 50 mm; The distance between the first outlet baffle (71) and the outlet of the first clarification pipe (21) is 30 mm 50 mm, and the distance between the second outlet baffle (72) and the outlet of the second clarification pipe (22) is 30 mm 50 mm, and the distance between the third outlet baffle (73) and the outlet of the third clarification pipe (23) is 30 mm 50 mm; the lower edge of the outlet of the heating section (1) is flush with the lower edge of the inlet of the first clarification tube (21), the lower edge of the outlet of the first clarification tube (21) is flush with the lower edge of the inlet of the first connecting tube (3), the lower edge of the outlet of the first connecting tube (3) is flush with the lower edge of the inlet of the second clarification tube (22), the lower edge of the outlet of the second clarification tube (22) is flush with the lower edge of the inlet of the second connecting tube (4), the lower edge of the outlet of the second connecting tube (4) is flush with the lower edge of the inlet of the third clarification tube (23), the cross-section of the outlet section (9) is circular, and the lower edge of the outlet of the third clarification tube (23) is flush with the lower edge of the outlet section (9).

6. The high-efficiency glass melt clarification platinum channel for high-generation substrate glass according to claim 5, characterized in that, the distance from the lower end of the first scraper (61) to the bottom of the first clarification tube (21) is 0.55 - 0.65 times the diameter dimension of the first clarification tube (21), both sides of the first scraper (61) are in contact with the inner wall of the first clarification tube (21), the distance from the lower end of the second scraper (62) to the bottom of the second clarification tube (22) is 0.55 - 0.65 times the diameter dimension of the second clarification tube (22), and both sides of the second scraper (62) are in contact with the inner wall of the second clarification tube (22); the first inlet baffle (51) and the first outlet baffle (71) have the same height, both being 0.55 - 0.6 times the diameter of the first clarification tube (21), both sides of the first inlet baffle (51) and the first outlet baffle (71) are in contact with the inner wall of the first clarification tube (21), the second inlet baffle (52) and the second outlet baffle (72) have the same height, both being 0.55 - 0.6 times the width of the second clarification tube (22), both sides of the second inlet baffle (52) and the second outlet baffle (72) are in contact with the inner wall of the second clarification tube (22), the third inlet baffle (53) and the third outlet baffle (73) have the same height, both being 0.55 - 0.6 times the diameter of the third clarification tube (23), both sides of the third inlet baffle (53) and the third outlet baffle (73) are in contact with the inner wall of the third clarification tube (23), the first inlet baffle (51), the first outlet baffle (71), the second inlet baffle (52), the second outlet baffle (72), the third inlet baffle (53) and the third outlet baffle (73) are all arc-shaped structures and have the same radian, the radian is 0.15π - 0.2π, and the bending directions of the arcs all face the outlet section (9).

7. A method for high-efficiency glass melt clarification of high-generation substrate glass, characterized in that, based on the high-efficiency glass melt clarification platinum channel for high-generation substrate glass according to any one of claims 1 - 6, comprising the following steps: S1. Heat the glass melt of high-generation substrate glass in the heating pipe (1) to 1600 °C 1650 °C to obtain a clarified glass melt. The clarified glass melt first enters the first clarification pipe (21), then turns over the first inlet baffle (51) and flows in the first clarification pipe (21). After encountering the obstruction of the first scraper (61), the glass melt flows through the gap between the first scraper (61) and the bottom of the first clarification pipe (21), then turns over the first outlet baffle (71) and flows into the second clarification pipe (22) through the first connecting pipe (3). The large air bubbles in the glass melt are discharged from the first exhaust pipe (81); When the clarified glass liquid flows in the first clarification tube (21), heat the first clarification tube (21) so that the temperature of the glass liquid is maintained at 1600°C 1650°C; In S2, the heated glass liquid in S1 turns over the second inlet baffle (52) and flows in the second clarification tube (22), and then encounters the obstruction of the second scraper (62). The glass liquid flows through the gap between the second scraper (62) and the bottom of the second clarification tube (22), then turns over the second outlet baffle (72) and flows into the third clarification tube (23) through the second connecting tube (4). The small bubbles in the glass liquid are discharged from the second exhaust pipe (82); When the glass liquid heated in S1 flows in the second clarification tube (22), the first connecting tube (3) and the second clarification tube (22) are heated so that the temperature of the glass liquid is maintained at 1600°C 1650°C, the liquid levels of the first clarification tube (21) and the second clarification tube (22) are the same and higher than the first inlet baffle (51), the first outlet baffle (71), the second inlet baffle (52) and the second outlet baffle (72); In S3, the heated glass liquid in S2 flows over the third inlet baffle (53) and flows in the third clarification pipe (23). The second connecting pipe (4) and the third clarification pipe (23) are heated to maintain the temperature of the glass liquid at 1550°C - 1600°C. The liquid level fills the third clarification pipe (23). The glass liquid then flows over the third outlet baffle (73) and into the outlet section (9). The small bubbles not discharged in the glass liquid dissolve in the glass liquid, completing the efficient clarification of the glass liquid of the high-generation substrate glass.

8. The method for efficiently clarifying the glass liquid of the high-generation substrate glass according to claim 7, characterized in that, the liquid level height in the first clarification tube (21) is below 2 / 3 of the diameter of the first clarification tube (21) and below 13 / 15 of the diameter of the second clarification tube (22).

Images