Device and method for improving homogenization effect of molten glass

Abstract

The invention relates to a device and a method for improving the homogenization effect of molten glass. The device comprises a hollow stirring rod, a connecting structure and a hollow stirring rake, the hollow stirring rod is connected with the hollow stirring rake through the connecting structure; the hollow stirring rod comprises a gas circulating pipeline and a liquid circulating pipeline; the liquid circulation pipeline wraps the middle part and the lower part of the gas circulation pipeline; the hollow part of the gas circulation pipeline and the hollow part of the hollow stirring rake are connected into a whole; the gas circulation pipeline comprises an upper gas circulation pipeline and a lower gas circulation pipeline; the upper gas circulation pipeline is provided with a gas inlet and a gas outlet; the liquid circulation pipeline is provided with a liquid inlet and a liquid outlet. The device provided by the invention can avoid great influence on production stability caused by melting of a platinum material and breakage of a molybdenum stirrer, greatly reduces the purchase cost, and improves the uniformity of molten glass.

Description

Technical Field

[0001] This invention relates to the field of glass production technology, and in particular to an apparatus and method for improving the homogenization effect of molten glass. Background Technology

[0002] In the production of ultra-thin glass, the requirements for the uniformity of the glass body are becoming increasingly stringent. Insufficient uniformity leads to minute differences in the glass's refractive index (stripes or ripples), which can cause visible distortion, rainbow patterns, or decreased clarity in applications such as display panels and optical lenses, resulting in the direct scrapping of products. Areas of chemical or thermal inhomogeneity form localized stress concentration points during cooling and solidification, a major cause of spontaneous glass breakage during processing and use, especially fatal in flexible display applications. The uniformity of the molten glass flow directly determines the flow stability of the melt in the forming zone, the accuracy of thickness control, and the flatness of the sheet surface. Inhomogeneity can cause uneven thickness, sheet warping, or even sheet breakage and production stoppage.

[0003] CN118652037A discloses a method for homogenizing high-alumina ultrathin glass, which employs an agitator for stirring molten glass. The agitator blades are arranged between agitator beams, which are connected to an agitator rod via an agitator shaft. A fixing nut is connected to the lower end of the agitator shaft via a threaded structure and is used to fix the agitator beams. A fixing pin passes through the fixing nut for further fixation. The method for homogenizing high-alumina ultrathin glass is as follows: Assemble the agitator components in a cold state; during the furnace heating process, after the glass depth in the furnace reaches a certain depth H, the agitator is installed, where H is the height from the liquid level to the bottom of the tank; then, install the entire agitator on the furnace; when the agitator blades are immersed in the molten glass, increase the immersion depth of the blades in the glass, and after the glass completely covers the blades, slowly raise the height of the blades to the normal operating height. Compared to platinum alloy stirrers, this stirrer reduces fixed asset investment and avoids asset loss due to fluctuations in precious metal prices. However, the investment is still relatively large. In addition, during use, it may still cause the platinum coating to tear or even fall off when used in molten glass with high viscosity. Furthermore, the potential difference between the molybdenum and glass fiber coating materials at high temperatures may cause the platinum material to melt or the molybdenum stirrer to break, which may have a significant impact on production stability.

[0004] CN112979143A discloses a glass melt stirring and homogenizing device, including a stirring tank, a stirring rod, stirring blades, a lifting and adjusting mechanism, and a stirring drive mechanism. The stirring tank is used to contain the glass melt. The stirring drive mechanism is driven to the upper end of the stirring rod to drive the stirring rod to rotate around its own axis. The lower end of the stirring rod is connected to the stirring blades, which are used to stir the glass melt in the stirring tank. The lifting and adjusting mechanism is used to move the stirring rod in the vertical direction, thereby driving the stirring blades to move in the vertical direction within the stirring tank. The stirring rod is configured to move in the vertical direction while rotating. Because the stirring blades move in the vertical direction while rotating, they can stir the glass melt at different liquid levels.

[0005] The aforementioned existing technologies cannot avoid the significant impact on production stability caused by platinum melting and molybdenum stirrer breakage. Therefore, there is an urgent need for a new device and method to improve the homogenization effect of molten glass, which can significantly reduce procurement costs while avoiding the significant impact on production stability caused by platinum melting and molybdenum stirrer breakage. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides an apparatus and method for improving the homogenization effect of molten glass. The apparatus of this invention can avoid the significant impact on production stability caused by platinum material melting and molybdenum stirrer breakage, greatly reducing procurement costs. During production and use, it is almost identical to the original stirrer, eliminating the problem of significant process fluctuations, and can improve the homogenization of molten glass and enhance product quality.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides an apparatus for improving the homogenization effect of molten glass, the apparatus comprising a hollow stirring rod, a connecting structure, and a hollow stirring rake; the hollow stirring rod is connected to the hollow stirring rake through the connecting structure;

[0009] The hollow stirring rod includes a gas circulation pipeline and a liquid circulation pipeline; the liquid circulation pipeline is wrapped around the middle and lower part of the gas circulation pipeline; the hollow part of the gas circulation pipeline is connected to the hollow part of the hollow stirring rake as a whole; the gas circulation pipeline includes an upper gas circulation pipeline and a lower gas circulation pipeline; the upper gas circulation pipeline is provided with an air inlet and an air outlet; the liquid circulation pipeline is provided with a liquid inlet and a liquid outlet.

[0010] The device of this invention, by setting up gas circulation pipelines and liquid circulation pipelines, can control the temperature of the hollow stirring rod and the hollow stirring rake, keeping the stirring device within a stable temperature range. This avoids the significant impact of platinum material melting and molybdenum stirrer breakage on production stability. At the same time, it can also significantly reduce procurement costs. During production and use, it is almost no different from the original stirrer, and there is no problem of large process fluctuations. It can improve the uniformity of glass melt and improve product quality.

[0011] As a preferred embodiment of the present invention, the hollow stirring rake has butterfly-shaped teeth.

[0012] As a preferred embodiment of the present invention, the gas circulation pipeline is provided with an inner gas pipe and an outer gas pipe; the inner gas pipe is connected to the outlet of the upper gas circulation pipeline through a rotary joint; and the outer gas pipe is connected to the inlet of the upper gas circulation pipeline through a rotary joint.

[0013] As a preferred embodiment of the present invention, the liquid circulation pipeline is provided with an inner liquid pipe and an outer liquid pipe; the inner liquid pipe is connected to the outlet of the liquid circulation pipeline through a rotary joint; and the outer liquid pipe is connected to the inlet of the liquid circulation pipeline through a rotary joint.

[0014] As a preferred technical solution of the present invention, the connection structure includes a flange connection structure or a threaded connection structure.

[0015] Preferably, the materials of the lower gas circulation pipeline and the hollow stirring rake each independently include nickel-based high-temperature alloys or cobalt-based high-temperature alloys.

[0016] As a preferred embodiment of the present invention, the device further includes a transmission mechanism connected to the upper part of the hollow stirring rod.

[0017] Secondly, the present invention provides a method for improving the homogenization effect of molten glass. The method employs the apparatus described in the first aspect for stirring.

[0018] As a preferred embodiment of the present invention, the method includes: introducing coolant into the inlet of the liquid circulation pipeline, the coolant flowing out from the outlet of the liquid circulation pipeline to form a liquid circulation path; introducing cooling gas into the inlet of the upper gas circulation pipeline, the cooling gas flowing out from the outlet of the upper gas circulation pipeline to form a gas circulation path; subsequently installing the device on the stirrer platform base; immersing the hollow stirring rake of the device into the molten glass for stirring treatment to improve the homogenization effect of the molten glass.

[0019] It should be noted that, in this invention, a temperature detection component is installed on the pipe from which the coolant flows out of the liquid circulation pipe, and a temperature detection component is also installed on the pipe from which the cooling gas flows out of the upper gas circulation pipe. The temperature detection components can monitor the temperature changes of the coolant and the cooling gas. The outlet temperature of the coolant is ≤50℃, and the outlet temperature of the cooling gas is ≤750℃. If the outlet temperature of the cooling gas is higher than 750℃, the flow rate of the cooling gas needs to be increased.

[0020] As a preferred embodiment of the present invention, the coolant comprises water; the cooling gas comprises nitrogen.

[0021] Preferably, the flow rate of the cooling gas is 50-150 m³ / h. 3 / h, for example 50m 3 / h, 70m 3 / h、90m 3 / h、110m 3 / h, 130m 3 / h, 150m 3 / h, etc., but not limited to the listed values; other unlisted values ​​within the above range also apply.

[0022] Preferably, the distance between the liquid circulation pipeline of the device and the surface of the molten glass is 5-6 mm, such as 5 mm, 5.2 mm, 5.4 mm, 5.6 mm, 5.8 mm, 6 mm, etc., but it is not limited to the listed values. Other unlisted values ​​within the above range are also applicable.

[0023] As a preferred technical solution of the present invention, the liquid circulation passage is specifically as follows: coolant flows in from the inlet of the liquid pipeline, passes through the outer liquid pipe and the inner liquid pipe in sequence, and flows out from the outlet of the liquid pipeline;

[0024] The gas circulation path is specifically as follows: cooling gas flows in from the inlet of the upper gas circulation pipeline, passes sequentially through the outer gas pipe of the upper gas circulation pipeline, the outer gas pipe of the lower gas circulation pipeline, the hollow stirring rake, the inner gas pipe of the lower gas circulation pipeline and the inner gas pipe of the upper gas circulation pipeline, and flows out from the outlet of the upper gas circulation pipeline.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] The device of this invention, by setting up gas circulation pipelines and liquid circulation pipelines, can control the temperature of the hollow stirring rod and the hollow stirring rake, keeping the stirring device within a stable temperature range. This avoids the significant impact of platinum material melting and molybdenum stirrer breakage on production stability. At the same time, it can also significantly reduce procurement costs. During production and use, it is almost no different from the original stirrer, and there is no problem of large process fluctuations. It can improve the uniformity of glass melt and improve product quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a device for improving the homogenization effect of molten glass provided by the present invention.

[0028] Among them, 1 is the air outlet, 2 is the air inlet, 3 is the upper gas inner pipe, 4 is the upper gas outer pipe, 5 is the liquid outlet, 6 is the liquid inlet, 7 is the liquid inner pipe, 8 is the liquid outer pipe, 9 is the connecting structure, 10 is the lower gas inner pipe, 11 is the lower gas outer pipe, and 12 is the hollow stirring rake. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, the following examples are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

[0030] Example 1

[0031] This embodiment provides a device for improving the homogenization effect of molten glass. The device includes a hollow stirring rod, a connecting structure 9, and a hollow stirring rake 12. The hollow stirring rod is connected to the hollow stirring rake 12 through the connecting structure 9.

[0032] The hollow stirring rod includes a gas circulation pipeline and a liquid circulation pipeline; the liquid circulation pipeline is wrapped around the middle and lower part of the gas circulation pipeline; the hollow part of the gas circulation pipeline is connected to the hollow part of the hollow stirring rake 12 as a whole; the gas circulation pipeline includes an upper gas circulation pipeline and a lower gas circulation pipeline; the upper gas circulation pipeline is provided with an air inlet 2 and an air outlet 1; the liquid circulation pipeline is provided with a liquid inlet 6 and a liquid outlet 5;

[0033] The hollow stirring rake 12 has butterfly-shaped rake teeth; the gas circulation pipeline is provided with an inner gas pipe 3 and an outer gas pipe 4; the inner gas pipe 3 is connected to the outlet 1 of the upper gas circulation pipeline through a rotary joint; the outer gas pipe 4 is connected to the inlet 2 of the upper gas circulation pipeline through a rotary joint.

[0034] The liquid circulation pipeline is provided with an inner liquid pipe 7 and an outer liquid pipe 8; the inner liquid pipe 7 is connected to the outlet 5 of the liquid circulation pipeline through a rotary joint; the outer liquid pipe 8 is connected to the inlet 6 of the liquid circulation pipeline through a rotary joint; the connection structure 9 includes a flange connection structure or a threaded connection structure; the lower gas circulation pipeline and the hollow stirring rake 12 are each made of nickel-based high-temperature alloy; the device also includes a transmission mechanism connected to the upper part of the hollow stirring rod.

[0035] Application Example 1

[0036] This application example provides a method for improving the homogenization effect of molten glass, wherein the method uses the apparatus described in Example 1 for stirring treatment;

[0037] The method includes: introducing coolant into the inlet 6 of the liquid circulation pipeline, the coolant flowing out from the outlet 5 of the liquid circulation pipeline to form a liquid circulation path; introducing cooling gas into the inlet 2 of the upper gas circulation pipeline, the cooling gas flowing out from the outlet 1 of the upper gas circulation pipeline to form a gas circulation path; then installing the device on the stirrer platform base; immersing the hollow stirring rake 12 of the device into the molten glass for stirring to improve the homogenization effect of the molten glass; the coolant is water; the cooling gas is nitrogen; the flow rate of the cooling gas is 110 m³ / h. 3 / h; the distance between the liquid circulation pipeline of the device and the surface of the molten glass is 5mm.

[0038] The liquid circulation path is as follows: coolant flows in from the inlet 6 of the liquid pipeline, passes through the outer liquid pipe 8 and the inner liquid pipe 7 in sequence, and flows out from the outlet 5 of the liquid pipeline.

[0039] The gas circulation path is specifically as follows: cooling gas flows in from the inlet 2 of the upper gas circulation pipeline, passes sequentially through the outer gas pipe 4 of the upper gas circulation pipeline, the outer gas pipe 11 of the lower gas circulation pipeline, the hollow stirring rake 12, the inner gas pipe 10 of the lower gas circulation pipeline, and the inner gas pipe 3 of the upper gas circulation pipeline, and flows out from the outlet 1 of the upper gas circulation pipeline.

[0040] In this invention, a temperature detection component is installed on the pipe from which the coolant flows out of the outlet 5 of the liquid circulation pipe, and a temperature detection component is also installed on the pipe from which the cooling gas flows out of the outlet 1 of the upper gas circulation pipe. The temperature detection components can monitor the temperature changes of the coolant and the cooling gas. The temperature at the outlet 5 of the coolant is ≤50℃, and the temperature at the outlet 1 of the cooling gas is ≤750℃. If the temperature at the outlet 1 of the cooling gas is higher than 750℃, the flow rate of the cooling gas needs to be increased.

[0041] Table 1 shows the calculation of nitrogen outlet temperature according to the model and operating conditions of the stirring device (Inconel 600) of the present invention. The specific temperatures are shown in Table 1 below.

[0042] Table 1

[0043]

[0044] In summary, this invention provides an apparatus and method for improving the homogenization effect of molten glass. The apparatus, by setting up gas and liquid circulation pipelines, can control the temperature of the hollow stirring rod and hollow stirring rake, keeping the stirring device within a stable temperature range. This avoids the significant impact of platinum material melting and molybdenum stirrer breakage on production stability. Simultaneously, it can significantly reduce procurement costs. During production and use, it is almost identical to the original stirrer, eliminating the problem of significant process fluctuations. It can improve the uniformity of molten glass and enhance product quality.

[0045] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. An apparatus for improving the homogenization effect of molten glass, characterized in that, The device includes a hollow stirring rod, a connecting structure, and a hollow stirring rake; the hollow stirring rod is connected to the hollow stirring rake through the connecting structure; The hollow stirring rod includes a gas circulation pipeline and a liquid circulation pipeline; the liquid circulation pipeline is wrapped around the middle and lower part of the gas circulation pipeline; the hollow part of the gas circulation pipeline is connected to the hollow part of the hollow stirring rake as a whole; the gas circulation pipeline includes an upper gas circulation pipeline and a lower gas circulation pipeline; the upper gas circulation pipeline is provided with an air inlet and an air outlet; the liquid circulation pipeline is provided with a liquid inlet and a liquid outlet.

2. The apparatus according to claim 1, characterized in that, The hollow stirring rake has butterfly-shaped teeth.

3. The apparatus according to claim 1 or 2, characterized in that, The gas circulation pipeline is provided with an inner gas pipe and an outer gas pipe; the inner gas pipe is connected to the outlet of the upper gas circulation pipeline through a rotary joint; the outer gas pipe is connected to the inlet of the upper gas circulation pipeline through a rotary joint.

4. The apparatus according to any one of claims 1-3, characterized in that, The liquid circulation pipeline is provided with an inner liquid pipe and an outer liquid pipe; the inner liquid pipe is connected to the outlet of the liquid circulation pipeline through a rotary joint; the outer liquid pipe is connected to the inlet of the liquid circulation pipeline through a rotary joint.

5. The apparatus according to any one of claims 1-4, characterized in that, The connection structure includes a flange connection structure or a threaded connection structure; Preferably, the materials of the lower gas circulation pipeline and the hollow stirring rake each independently include nickel-based high-temperature alloys or cobalt-based high-temperature alloys.

6. The apparatus according to any one of claims 1-5, characterized in that, The device also includes a transmission mechanism connected to the upper part of the hollow stirring rod.

7. A method for improving the homogenization effect of molten glass, characterized in that, The method employs the apparatus described in any one of claims 1-6 for stirring treatment.

8. The method according to claim 7, characterized in that, The method includes: introducing coolant into the inlet of the liquid circulation pipeline, the coolant flowing out from the outlet of the liquid circulation pipeline to form a liquid circulation path; introducing cooling gas into the inlet of the upper gas circulation pipeline, the cooling gas flowing out from the outlet of the upper gas circulation pipeline to form a gas circulation path; then installing the device on the stirrer platform base; immersing the hollow stirring rake of the device into the molten glass for stirring to improve the homogenization effect of the molten glass.

9. The method according to claim 7 or 8, characterized in that, The coolant includes water; the cooling gas includes nitrogen. Preferably, the flow rate of the cooling gas is 50-150 m³ / h. 3 / h; Preferably, the distance between the liquid circulation pipeline of the device and the surface of the molten glass is 5-6 mm.

10. The method according to any one of claims 7-9, characterized in that, The liquid circulation path is specifically as follows: coolant flows in from the inlet of the liquid pipeline, passes through the outer liquid pipe and the inner liquid pipe in sequence, and flows out from the outlet of the liquid pipeline. The gas circulation path is specifically as follows: cooling gas flows in from the inlet of the upper gas circulation pipeline, passes sequentially through the outer gas pipe of the upper gas circulation pipeline, the outer gas pipe of the lower gas circulation pipeline, the hollow stirring rake, the inner gas pipe of the lower gas circulation pipeline and the inner gas pipe of the upper gas circulation pipeline, and flows out from the outlet of the upper gas circulation pipeline.

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