Annealing furnace opening circulating dust removal device and using method thereof

Abstract

The invention discloses an annealing furnace opening circulating dust removal device and a using method thereof, and belongs to the technical field of plate glass manufacturing. The device comprises a dust collection and air draft pipeline, the dust collection and exhaust pipeline is arranged in the circumferential direction of an outlet of the annealing furnace opening; an air suction opening is formed below the dust collection and air suction pipeline; the suction opening is connected with a driving device; and the driving device is connected to an air inlet of the dust collection and air draft pipeline. Gas around the outlet of the annealing furnace opening is exhausted from top to bottom through the dust collection and air draft pipeline to form an air barrier, due to the blocking effect of the air barrier, external small-particle dust is difficult to penetrate through the barrier to enter the annealing furnace, air at the annealing furnace opening circulates from top to bottom, and peripheral dust cannot be sucked back into the annealing furnace any more. Pollution in the annealing furnace can be effectively avoided, and surface cleanness of the glass plate is guaranteed; the device is simple in structure and convenient to operate and implement.

Description

Technical Field

[0001] The invention belongs to the technical field of flat glass manufacturing, and relates to an annealing furnace mouth circulating dust removal device and a use method thereof. Background Art

[0002] The overflow down-draw method is one of the main methods for manufacturing liquid crystal substrate glass. This method is to feed the molten glass into the overflow trough. When the overflow trough is full, the glass liquid will overflow along the two sides of the overflow trough and flow to the inclined wall. The two streams of glass liquid will merge, and after being clamped by the shaping equipment and pulled by the traction equipment, a single glass plate will be finally formed.

[0003] As the market's requirements for new display devices' clarity, color saturation and other performance are getting higher and higher, panel manufacturers are also stricter about the surface defects of substrate glass, which puts higher cleanliness requirements on the process environment of substrate glass. In order to achieve this goal, it is necessary to control the entire process of substrate glass production and manufacturing. Under the existing equipment and process conditions, on the one hand, due to the large temperature difference between the inside and outside of the annealing furnace, thermal convection is easily generated near the furnace mouth due to the temperature difference, and thermal convection is easy to carry small particles of dust in the external environment into the annealing furnace. On the other hand, during the cross-cutting, scribing, and bending process, the glass plate may crack and break, thereby generating a large amount of small particles of dust. Under the action of thermal convection, these dusts are easy to float, suspend, and adhere to the surface of the glass plate, eventually forming thermal adhesion defects (Adhered Glass, ADG). In addition, due to the strong adhesion of ADG generated at high temperature, it is difficult to clean it thoroughly in subsequent processing, and there is also a greater risk of scratches, which seriously affects the quality of the substrate glass.

[0004] In summary, the existing technology cannot prevent small dust particles from entering the annealing furnace, and it is difficult to fundamentally improve the furnace environment and reduce the thermal adhesion defects on the surface of the glass plate. Summary of the invention

[0005] The invention provides an annealing furnace mouth circulating dust removal device and a use method thereof, so as to solve the technical problem that small and medium-sized dust particles enter the annealing furnace in the prior art and pollute the glass plate, thereby affecting the surface quality of the glass plate.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides an annealing furnace mouth circulating dust removal device, comprising a dust collecting and exhausting duct; the dust collecting and exhausting duct is arranged along the circumference of the outlet of the annealing furnace mouth; an exhaust port is arranged below the dust collecting and exhausting duct; the exhaust port is connected to a driving device; the driving device is connected to the air inlet of the dust collecting and exhausting duct.

[0007] Furthermore, the dust collecting and exhausting pipeline has a plurality of exhaust hole structures on one side close to the exhaust port; the exhaust hole structures are arranged along the radial direction of the dust collecting and exhausting pipeline.

[0008] Furthermore, the plurality of exhaust hole structures are arranged at equal intervals on the dust collecting and exhausting duct.

[0009] Furthermore, the exhaust hole structure is a strip-shaped exhaust hole.

[0010] Furthermore, a dust removal system is provided between the air intake port and the driving device.

[0011] Furthermore, the air inlet of the dust collection and exhaust pipeline is also connected to an air supply system.

[0012] Furthermore, a wind speed detection device is installed at the air inlet of the dust collection and exhaust pipeline.

[0013] Furthermore, the driving device is a circulating fan.

[0014] In a second aspect, the present invention provides a method for using the above-mentioned annealing furnace mouth circulating dust removal device, comprising the following steps: The gas around the annealing furnace outlet is discharged from top to bottom through the dust collecting exhaust duct to form a wind barrier, and enters the dust removal system through the exhaust port, and is then sent to the air inlet of the dust collecting exhaust duct through the driving device.

[0015] Furthermore, it also includes: The wind speed at the air inlet is detected in real time through the wind speed detection device; when the wind speed is lower than the preset value, the air supply system is turned on to supplement the air volume to ensure the stability of the wind barrier at the annealing furnace mouth.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a circulating dust removal device for an annealing furnace mouth and a method for using the same. A dust collecting and exhausting duct is arranged around the outlet of the annealing furnace mouth and is equipped with an exhaust port, which can realize all-round and efficient capture of the air around the annealing furnace mouth, and transport the collected air back to the air inlet of the dust collecting and exhausting duct through a driving device for recycling. The gas around the outlet of the annealing furnace mouth is discharged from top to bottom through the dust collecting and exhausting duct to form a wind barrier. Due to the barrier effect of the wind barrier, it is difficult for small particles of dust outside to pass through the barrier and enter the annealing furnace. The wind at the annealing furnace mouth circulates from top to bottom, and the peripheral dust can no longer be sucked back into the annealing furnace, which can effectively avoid pollution in the annealing furnace and ensure the cleanliness of the surface of the glass plate. The present invention has a simple structure, convenient operation, and is easy to implement.

[0017] Furthermore, the present invention takes into account the loss during the air circulation process and installs a wind speed detection device at the air inlet. When the air volume is insufficient, the air supply system is turned on to supplement the air volume to ensure the stability of the wind barrier at the annealing furnace mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the circulating dust removal device at the annealing furnace mouth according to an embodiment of the present invention (front view); Figure 2 This is a schematic diagram of the structure of the circulating dust removal device at the annealing furnace mouth according to an embodiment of the present invention (top view); Figure 3 The present invention is a schematic diagram of the working principle of the annealing furnace mouth circulating dust removal device according to an embodiment of the present invention.

[0020] Among them: 1-dust collection and exhaust pipeline; 2-exhaust port; 3-dust removal system; 4-circulation fan; 5-wind speed detection device; 6-air supply system; 7-air inlet; 8-exhaust hole structure; 9-annealing furnace port. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 1 The embodiment of the present invention discloses a circulating dust removal device for an annealing furnace mouth, comprising a dust collecting and exhausting duct 1; the dust collecting and exhausting duct 1 is arranged along the circumferential direction of the outlet of the annealing furnace mouth 9; an exhaust port 2 is arranged below the dust collecting and exhausting duct 1; the exhaust port 2 is connected to a driving device; the driving device is connected to the air inlet 7 of the dust collecting and exhausting duct 1. The gas around the outlet of the annealing furnace mouth 9 is discharged from top to bottom through the dust collecting and exhausting duct 1 to form a wind barrier. Due to the blocking effect of the wind barrier, it is difficult for small particles of dust outside to pass through the barrier and enter the annealing furnace. The wind at the annealing furnace mouth 9 circulates from top to bottom, and the peripheral dust can no longer be sucked back into the annealing furnace, which can effectively avoid pollution in the annealing furnace and ensure the cleanliness of the surface of the glass plate. The present invention has a simple structure, convenient operation, and is easy to implement.

[0028] In a possible embodiment of the present invention, see Figure 2 The dust collecting and exhausting pipe 1 has a plurality of exhaust hole structures 8 on one side close to the exhaust port 2; the exhaust hole structures 8 are arranged along the radial direction of the dust collecting and exhausting pipe 1. The plurality of exhaust hole structures 8 are arranged at equal distances; the exhaust hole structures 8 are strip-shaped exhaust holes.

[0029] In a feasible embodiment of the present invention, the driving device preferably adopts a circulating fan 4. A dust removal system 3 is arranged between the exhaust port 2 and the driving device. The air inlet 7 of the dust collection and exhaust duct 1 is also connected to an air supply system 6. A wind speed detection device 5 is installed at the air inlet 7, which can detect the air volume entering the integrated exhaust duct 1 from the circulating fan 4 in real time. When the air volume is lower than the set value, the air supply system 6 is fed back, and the air supply system 6 is automatically turned on and supplied according to the air volume. The air supply system 6 supplements the filtered natural wind.

[0030] After being discharged from top to bottom, the gas is collected through the exhaust port 2 and enters the dust removal system 3. The gas filtered by the dust removal system 3 is then sent to the air inlet of the dust collection and exhaust pipeline 1 through the circulating fan 4, forming a closed circulation system of the annealing furnace port 9.

[0031] The embodiment of the present invention discloses a method for using an annealing furnace mouth circulating dust removal device, comprising the following steps: The gas around the outlet of the annealing furnace port 9 is discharged from top to bottom through the dust collecting exhaust pipe 1 to form a wind barrier, and enters the dust removal system 3 through the exhaust port 2, and is then sent to the air inlet 7 of the dust collecting exhaust pipe 1 through the driving device.

[0032] The wind speed at the air inlet 7 is detected in real time by the wind speed detection device 5; when the wind speed is lower than the preset value, the air supply system 6 is turned on to supplement the air volume to ensure the stability of the wind barrier at the annealing furnace port 9.

[0033] The working principle of the present invention is as follows: See also Figure 3The circulating dust removal device for the annealing furnace mouth of the present invention comprises a dust collecting and exhausting air pipeline 1, an exhaust port 2, a dust removal system 3, a circulating fan 4, a wind speed detection device 5, and an air supply system 6. The dust collecting and exhausting air pipeline 1 is arranged in a circular, rectangular, or elliptical manner, surrounding the outlet of the annealing furnace. The dust collecting and exhausting air pipeline 1 has an air inlet 7 and an exhaust hole 8 structure, and there is only one air inlet, which is connected to the circulating fan 4 on the side wall of the integrated exhausting air pipeline 1; the exhaust hole structure 8 is evenly distributed along the lower wall of the dust collecting and exhausting air pipeline 1, and extends downward to form a strip exhaust hole. The gas is discharged from the annealing furnace 9 outlet from top to bottom to form a circle of gas barrier. After the gas is discharged from top to bottom, it is collected through the exhaust port 2 and enters the dust removal system 3. The gas filtered by the dust removal system 3 is then sent to the air inlet 7 of the dust collecting and exhausting air pipeline 1 through the circulating fan 4 to form a closed circulation system of the annealing furnace mouth 1. In addition, considering the loss during the air volume circulation process, the wind speed detection device 5 is installed at the air inlet 7. When the air volume is insufficient, the air supply system is automatically turned on to supplement the air volume to ensure the stability of the wind barrier at the annealing furnace port 9. On the one hand, due to the barrier effect of the gas barrier, it is difficult for small particles of dust from the outside to pass through the barrier and enter the annealing furnace; on the other hand, since the wind at the annealing furnace port 9 circulates from top to bottom, a relatively closed small system is formed, and external dust cannot enter the annealing furnace by back suction. In this way, the system can quickly and effectively prevent small particles of dust from entering the annealing furnace, reduce furnace pollution, and reduce thermal adhesion defects on the surface of the glass plate, so as to achieve the purpose of the present invention.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An annealing furnace mouth circulating dust removal device, characterized in that: The invention comprises a dust collecting and exhausting pipeline (1); the dust collecting and exhausting pipeline (1) is arranged along the circumferential direction of the outlet of the annealing furnace port (9); an exhaust port (2) is arranged below the dust collecting and exhausting pipeline (1); the exhaust port (2) is connected to a driving device; the driving device is connected to the air inlet (7) of the dust collecting and exhausting pipeline (1).

2. The annealing furnace mouth circulating dust removal device according to claim 1, characterized in that: A side of the dust collecting and exhausting air pipeline (1) close to the exhaust port (2) is provided with a plurality of exhaust hole structures (8); the exhaust hole structures (8) are arranged along the radial direction of the dust collecting and exhausting air pipeline (1).

3. The annealing furnace mouth circulating dust removal device according to claim 2, characterized in that: The plurality of exhaust hole structures (8) are arranged at equal intervals on the dust collection and exhaust pipeline (1).

4. The annealing furnace mouth circulating dust removal device according to claim 2, characterized in that: The exhaust hole structure (8) is a strip-shaped exhaust hole.

5. The annealing furnace mouth circulating dust removal device according to claim 1, characterized in that: A dust removal system (3) is provided between the air exhaust port (2) and the driving device.

6. The annealing furnace mouth circulating dust removal device according to claim 1, characterized in that: The air inlet (7) of the dust collection and exhaust pipeline (1) is also connected to an air supply system (6).

7. The annealing furnace mouth circulating dust removal device according to claim 6, characterized in that: A wind speed detection device (5) is installed at the air inlet (7) of the dust collection and exhaust pipeline (1).

8. The annealing furnace mouth circulating dust removal device according to claim 1, characterized in that: The driving device is a circulating fan (4).

9. A method for using the annealing furnace mouth circulating dust removal device according to claims 5 to 8, characterized in that: The following steps are involved: The gas around the outlet of the annealing furnace (9) is discharged from top to bottom through the dust collecting exhaust pipe (1) to form a wind barrier, and enters the dust removal system (3) through the exhaust port (2), and is then sent to the air inlet (7) of the dust collecting exhaust pipe (1) through the driving device.

10. The method for using the annealing furnace mouth circulating dust removal device according to claim 9, characterized in that: Also includes: The wind speed at the air inlet (7) is detected in real time by means of a wind speed detection device (5); When the wind speed is lower than a preset value, the air supply system (6) is turned on to supply air volume, thereby ensuring the stability of the wind barrier at the annealing furnace port (9).

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