A fining homogenizing device for a substrate glass furnace

Abstract

The application discloses a kind of clarifying homogenizing devices of substrate glass kiln, including the kiln body for containing glass liquid, the kiln body is provided with feeding port and discharge port, the horizontal plane where feeding port is located is higher than the horizontal plane where discharge port is located to make glass liquid can flow by gravity, the inside of kiln body is provided with at least two levels stepped retaining wall structure along the flow direction of glass liquid to slow down glass liquid flow and precipitate impurities.The present application realizes the spatial decoupling of bubble removal and impurity removal by the stepped structure of vertical flow resistance components and horizontal flow extension precipitation components.The vertical flow resistance components force the bottom glass liquid to surge, and transport the deep layer micro-bubbles to the high-temperature area of liquid surface to complete physical bubble breaking, without chemical clarifying agent to ensure the bubble removal effect.

Description

Technical Field

[0001] This invention relates to the field of glass processing technology, and in particular to a clarification and homogenization apparatus for a substrate glass furnace. Background Technology

[0002] High-precision electronic substrate glass often uses alkali-free or slightly alkali aluminosilicate materials. The high viscosity of the molten glass after high-temperature melting makes it prone to trapping tiny air bubbles and producing uneven streaks during the melting process. With the upgrading of environmental standards, the production of arsenic-free, antimony-free, and chemical-free clarifying agents has become an industry necessity. Relying solely on physical structure to clarify and homogenize the molten glass is currently the mainstream production method.

[0003] The core defect of existing physical clarification and homogenization equipment is that the clarification and impurity removal processes are coupled together. During the flow and tumbling of the glass melt, unmelted raw material particles and refractory material detachment impurities that have settled at the bottom of the furnace will be re-rolled into the mainstream liquid. After the defoaming operation is completed, new solid defects are easily introduced. It is impossible to achieve efficient defoaming and impurity purification at the same time, which makes it difficult to meet the production quality requirements of high-precision substrate glass. Summary of the Invention

[0004] In order to solve the technical problems existing in the background art, the present invention proposes a clarification and homogenization device for substrate glass furnace.

[0005] The present invention proposes a clarification and homogenization device for a substrate glass furnace, comprising a furnace body for holding molten glass, wherein the furnace body is provided with a feeding port and a discharging port, the horizontal plane of the feeding port is higher than the horizontal plane of the discharging port so that the molten glass can flow by its own weight, and the interior of the furnace body is provided with at least two stepped baffle structures along the flow direction of the molten glass to slow down the flow of the molten glass and precipitate impurities.

[0006] Preferably, the stepped baffle structure includes vertical flow-blocking components and horizontal flow-extending sedimentation components; the vertical flow-blocking components are used to block the horizontal flow of molten glass, so as to drive the molten glass to form an upward surge and overflow through the top of the vertical flow-blocking components to the horizontal flow-extending sedimentation components; the horizontal flow-extending sedimentation components are horizontally arranged between two adjacent vertical flow-blocking components, and the surface of the horizontal flow-extending sedimentation components is provided with flow channels to perform stratified flow-extending of the molten glass flowing through the flow channels and to precipitate impurities.

[0007] Preferably, the height of each level of vertical flow-blocking component increases along the flow direction of the molten glass.

[0008] Preferably, the vertical flow-blocking component is a solid refractory material structure.

[0009] Preferably, the transverse flow sedimentation member is provided with an array of flow holes that penetrate the transverse flow sedimentation member, and the cross-section of the flow holes is a cone shape with a larger top and a smaller bottom.

[0010] Preferably, the flow holes on the transverse flow sedimentation component are evenly distributed on the plate surface, and multiple flow holes together form a flow channel.

[0011] Preferably, a vertical perforated plate is provided inside the kiln body at the final stepped baffle structure near the discharge port; the vertical perforated plate is located at the rear end of the final stepped baffle structure, and the surface of the vertical perforated plate is covered with homogenizing liquid discharge holes to stabilize the speed of the glass liquid flowing out of the discharge port.

[0012] This invention proposes a clarification and homogenization device for a substrate glass furnace. Its advantages include: a stepped structure composed of alternating vertical flow-blocking components and transverse flow-extending sedimentation components, achieving spatial decoupling of glass melt defoaming and impurity removal. The vertical flow-blocking components force the bottom layer of glass melt to rise, transporting deep microbubbles to the high-temperature region of the liquid surface for physical bubble breaking, ensuring effective defoaming without the need for chemical clarifying agents. The transverse flow-extending sedimentation components stabilize the flow field, trap high-density impurities, and prevent secondary entrainment of impurities into the main liquid, simultaneously completing clarification and impurity purification. The stepped baffle structure regulates the flow path of the glass melt, standardizes the residence time of the glass melt within the furnace body, and eliminates flow defects inherent in traditional structures. Combined with the microscopic shearing and homogenization effect of the vertical perforated plate at the discharge end, it effectively eliminates streaks caused by uneven glass melt composition and temperature, stabilizes the discharge flow field, and significantly improves the optical uniformity and finished product quality of the substrate glass. Attached Figure Description

[0013] Figure 1 This is an internal structural diagram of a clarification and homogenization device for a substrate glass furnace proposed in this invention. Detailed Implementation

[0014] refer to Figure 1 This invention proposes a clarification and homogenization device for a substrate glass furnace, comprising a furnace body 1 for holding molten glass. The furnace body 1 has a feeding port 2 and a discharge port 3 correspondingly arranged on it. The horizontal plane of the feeding port 2 is higher than that of the discharge port 3, achieving self-redirecting flow of the molten glass based on the height difference. At least two levels of stepped baffle structures are arranged inside the furnace body 1 along the flow direction of the molten glass. These stepped baffle structures change the flow path and flow state of the molten glass, achieving flow rate regulation, bubble removal, and impurity precipitation.

[0015] The stepped baffle structure includes alternating vertical flow-blocking components 4 and transverse flow-extending sedimentation components 5. The vertical flow-blocking components 4 are fixed inside the furnace body 1, blocking the horizontal flow path of the bottom layer of molten glass, changing its original flow direction, and driving the bottom layer of molten glass upwards to form an upward flow. After overflowing from the top of the vertical flow-blocking components 4, the molten glass flows into the area of ​​the subsequent transverse flow-extending sedimentation components 5. The transverse flow-extending sedimentation components 5 are horizontally installed and fixed between adjacent vertical flow-blocking components 4, forming a horizontal transition section of the stepped baffle structure. The transverse flow-extending sedimentation components 5 have through-flow channels on their surfaces. The molten glass flowing through these channels is guided and slowed down, allowing high-density solid impurities within the molten glass to precipitate and be retained under stable flow field conditions.

[0016] Along the overall flow direction of the molten glass, the height of each level of vertical flow-blocking component 4 increases sequentially, gradually changing the flow cross-section of the molten glass inside the furnace body 1 and gradient-controlling the flow state of the molten glass. The vertical flow-blocking component 4 adopts an integral solid refractory material structure with no through holes inside, achieving complete interception and blocking of the bottom layer of molten glass and ensuring the forced upward flow effect of the molten glass. Several through-holes 51 are arranged in an array on the plate surface of the transverse flow-extending sedimentation component 5, and all the through-holes 51 together form the flow channel of the transverse flow-extending sedimentation component 5. The cross-section of a single through-hole 51 is set as a conical structure with a larger top and a smaller bottom. The conical hole structure optimizes the throttling and extending effect of the molten glass and stabilizes the flow field in the sedimentation area.

[0017] Inside the furnace body 1, at the rear end of the final stepped baffle structure near the discharge port 3, a vertical perforated plate 6 is fixedly installed. The surface of the vertical perforated plate 6 is perpendicular to the macroscopic flow direction of the molten glass, and several through-holes 61 are evenly distributed on the surface of the vertical perforated plate 6. After multi-stage clarification and sedimentation, the molten glass flows out through the homogenization outlet holes 61, achieving a unified and stable flow field and velocity of the molten glass at the discharge end, and completing the final microscopic homogenization treatment of the molten glass.

[0018] The furnace body 1 serves as the supporting structure for the melting and refining of substrate glass. The feeding port 2 is located at the inlet end of the furnace body 1, and the discharge port 3 is located at the outlet end. The height difference between the feeding port 2 and the discharge port 3 allows the molten glass to flow under its own weight in a fixed direction. Inside the furnace body 1, the refining zone is equipped with a multi-level stepped baffle structure arranged sequentially along the flow direction of the molten glass. Each level of the stepped baffle structure has the same structural form, and the increasing height creates a gradient flow structure.

[0019] The vertical flow-blocking component 4 is a solid refractory material integrated structure that completely blocks the horizontal flow path of the bottom glass liquid. The bottom layer of low-temperature, high-viscosity glass liquid containing microbubbles is blocked by the component and cannot move horizontally forward. It can only surge upward along the vertical surface of the vertical flow-blocking component 4, forming a regular upward flow. After the glass liquid rises to the surface high-temperature area, the bubbles are broken, and then it overflows from the top of the vertical flow-blocking component 4.

[0020] A transverse flow-extending sedimentation component 5 is fixedly installed between two adjacent vertical flow-blocking components 4, and the transverse flow-extending sedimentation component 5 is arranged horizontally. The uniformly arrayed conical flow holes 51 on the component plate form the only flow path for the molten glass. When the molten glass passes through the conical flow holes 51, a throttling effect occurs, the overall flow velocity decreases, and the flow field tends to be stable. High-density impurities such as unmelted raw material particles and refractory material spalling carried in the molten glass are separated from the mainstream liquid in the stable flow field and precipitate in the region of the transverse flow-extending sedimentation component 5, realizing the continuous interception of solid impurities.

[0021] Along the flow direction of the molten glass, the height of each level of vertical flow-blocking component 4 increases progressively, gradually narrowing the flow cross-section of the molten glass surface. This gradient control of the flow state of the molten glass surface ensures that each step structure can complete one forced upward flow defoaming and steady flow sedimentation process, achieving multi-stage progressive clarification and purification of the molten glass.

[0022] A vertical perforated plate 6 is fixedly installed on the discharge side of the final-stage stepped baffle structure, covering the entire glass melt flow section of the furnace body 1. The glass melt, after multi-stage clarification and sedimentation, flows out through the homogenization outlet holes 61 on the vertical perforated plate 6. The large overall liquid flow is divided into multiple uniform fine streams. The shearing action of the orifice walls eliminates localized compositional and temperature inhomogeneities in the glass melt, stabilizing the overall flow field at the discharge end and ensuring a uniform overall state of the glass melt flowing from the discharge port 3. The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A clarification and homogenization apparatus for a substrate glass furnace, characterized in that, The furnace body (1) is used to hold molten glass. The furnace body (1) is provided with a feeding port (2) and a discharge port (3). The horizontal plane of the feeding port (2) is higher than the horizontal plane of the discharge port (3) so that the molten glass can flow by its own weight. The interior of the furnace body (1) is provided with at least two stepped baffle structures along the flow direction of the molten glass to slow down the flow of the molten glass and settle impurities.

2. The clarification and homogenization apparatus for a substrate glass furnace according to claim 1, characterized in that, The stepped baffle structure includes a vertical flow-blocking component (4) and a horizontal flow-extending sedimentation component (5). The vertical flow-blocking component (4) is used to block the horizontal flow of the glass melt, so as to drive the glass melt to form an upward surge and overflow through the top of the vertical flow-blocking component (4) to the horizontal flow-extending sedimentation component (5). The horizontal flow-extending sedimentation component (5) is horizontally arranged between two adjacent vertical flow-blocking components (4). The surface of the horizontal flow-extending sedimentation component (5) is provided with a flow channel to perform stratified flow-extending of the glass melt flowing through the flow channel and to precipitate impurities.

3. The clarification and homogenization apparatus for a substrate glass furnace according to claim 2, characterized in that, The height of each level of vertical flow-blocking component (4) increases along the flow direction of the molten glass.

4. The clarification and homogenization apparatus for a substrate glass furnace according to claim 3, characterized in that, The vertical flow-blocking component (4) is a solid refractory material structure.

5. The clarification and homogenization apparatus for a substrate glass furnace according to claim 2, characterized in that, The transverse flow sedimentation member (5) is arranged with flow holes (51) that penetrate the transverse flow sedimentation member (5). The cross-section of the flow holes (51) is a cone shape with a larger top and a smaller bottom.

6. The clarification and homogenization apparatus for a substrate glass furnace according to claim 5, characterized in that, The flow holes (51) on the transverse flow sedimentation component (5) are evenly distributed on the plate surface, and multiple flow holes (51) together form a flow channel.

7. The clarification and homogenization apparatus for a substrate glass furnace according to claim 1, characterized in that, Inside the kiln body (1), a vertical perforated plate (6) is provided at the last stage stepped baffle structure near the discharge port (3). The vertical perforated plate (6) is located at the rear end of the last stage stepped baffle structure. The surface of the vertical perforated plate (6) is covered with homogenizing liquid discharge holes (61) to stabilize the speed of the glass liquid flowing out of the discharge port (3).

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