Device for reducing hydroxyl content of glass in total oxygen kiln
By using secondary staged air intake and high-pressure air combustion-assisted technologies in the all-oxygen kiln, the problem of high water vapor content in the flue gas is solved, the formation of silicon hydroxyl groups in the glass is reduced, and the quality and appearance of the glass are improved.
Patent Information
- Application Number
- CN202421760626.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-24
AI Technical Summary
After the natural gas combustion, the existing all-oxygen combustion equipment has a high content of water vapor and carbon dioxide in the flue gas, resulting in the presence of structural water in the glass liquid, affecting the melting and forming process and performance of the glass, and causing open bubbles to form on the glass surface, reducing the quality of the glass.
A fully oxygen furnace device is designed, including a gas shell, an air outer pipe, an internal gas pipe and a gas nozzle. It can help combustion by secondary segmented air intake and high-pressure air to ensure sufficient combustion of natural gas, reduce the water vapor content in the flue gas, and thus reduce the formation of silicon hydroxyl groups in the glass.
Through sufficient combustion and combustion-stimulating technology, the amount of silicon hydroxyl groups in the glass is significantly reduced, the production of foam on the glass surface is reduced, and the quality and appearance of the glass are improved.
Smart Images
Figure CN222861378U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glass production, in particular to a device for reducing the hydroxyl content of glass in an all-oxygen furnace. Background Art
[0002] The solubility of water in molten glass is as high as 400-600 ppm, and it mainly exists in the form of structural water of -OH group. The existence of structural water will have a certain impact on the melting, forming process and glass properties of the glass. When the molten glass enters the tin bath, the structural water in the molten glass will react with the hydrogen in the tin bath to generate water vapor, which will lead to the formation of a large number of open bubbles on the lower surface of the glass, thereby reducing the quality of the finished glass.
[0003] After the existing oxyfuel combustion equipment burns natural gas, the content of water vapor and carbon dioxide in the flue gas is as high as 95%. 2 With H 2 0 Dissolution, diffusion, chemical bonding and other reactions will occur in the glass liquid, leaving a large amount of structural water in the glass; therefore, in order to reduce the water vapor content in the flue gas components and thus reduce the hydroxyl content in the glass liquid, it is necessary to design a device for reducing the hydroxyl content of the glass in an all-oxygen furnace. Utility Model Content
[0004] In view of the existing problems, the utility model provides a device for reducing the hydroxyl content of glass in an all-oxygen furnace, aiming to solve the problems mentioned in the background technology.
[0005] To solve the above problems, the utility model provides a device for reducing the hydroxyl content of glass in an oxygen furnace, comprising a fuel gas shell, one end of the fuel gas shell is connected to an outer air tube, an inner gas tube is arranged in the fuel gas shell, a gas nozzle is arranged at the end of the inner gas tube, a first-level air inlet disk is installed at one end of the outer air tube and at the position of the gas nozzle, a high-pressure air interface is opened in the center of the upper side of the outer air tube, a diverter plate is arranged inside the outer air tube and at one side of the first-level air inlet disk, a second-level air inlet pipe is connected to the outside of the outer air tube close to the first-level air inlet disk, and a burner brick is connected to the outside of the outer air tube and at one side of the first-level air inlet disk.
[0006] Furthermore, two ignition electrodes are provided through the axial surface of the gas shell, and the two ignition electrodes penetrate the primary air inlet disk to the two sides of the gas nozzle.
[0007] Furthermore, a gas pressure measuring hole is provided at the center of the lower side of the gas shell and the gas inner tube, and an air pressure measuring hole is provided at the center of the lower side of the air outer tube.
[0008] Furthermore, a gas pressure gauge is installed on the lower side of the gas shell and is connected to the gas pressure measuring hole, and an air pressure gauge is installed on the lower side of the air outer pipe and is connected to the air pressure measuring hole.
[0009] Furthermore, the first-stage air inlet disk includes an air inlet disk, and a plurality of air inlet holes are opened on the air inlet disk.
[0010] Furthermore, the gas casing and the air outer pipe are connected by a flange, and the gas casing and the burner brick are connected by a flange.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] Technical effects and advantages of the utility model:
[0013] 1. The utility model detects the pressure of gas and air respectively through a gas pressure gauge and an air pressure gauge to ensure that the gas and air are mixed in a proper proportion, thereby ensuring full combustion and avoiding the occurrence of residues, which is beneficial to improving the efficiency and quality of combustion.
[0014] 2. The utility model ensures full combustion of natural gas through two-stage segmented air intake. At the same time, air is used to assist combustion to reduce the water vapor content in the flue gas components, thereby reducing the Si-OH content in the glass, thereby reducing the generation of foam on the glass surface and improving the quality of the glass. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of a device for reducing the hydroxyl content of glass in an all-oxygen furnace;
[0016] Figure 2 It is a cross-sectional schematic diagram of a device for reducing the hydroxyl content of glass in an all-oxygen furnace;
[0017] Figure 3 It is a front schematic diagram of a device for reducing the hydroxyl content of glass in an all-oxygen furnace;
[0018] Figure 4 A partial schematic diagram of a pressure gauge for a device for reducing the hydroxyl content of glass in an all-oxygen furnace
[0019] Figure 5 It is a partial schematic diagram of a primary air inlet plate of a device for reducing the hydroxyl content of glass in an all-oxygen furnace;
[0020] 1. Gas shell; 2. Air shell; 3. Gas inner pipe; 4. Gas nozzle; 5. Primary air inlet plate; 501. Air inlet plate; 502. Swirl slot hole; 6. High-pressure air interface; 7. Ignition electrode; 8. Gas pressure measuring hole; 9. Air pressure measuring hole; 10. Secondary air inlet pipe; 11. Diverter plate; 12. Burner brick; 13. Gas pressure gauge; 14. Air pressure gauge. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] See also Figure 1-Figure 4 The utility model provides a device for reducing the hydroxyl content of glass in an all-oxygen kiln, comprising a fuel gas shell 1, one end of the fuel gas shell 1 is connected to an outer air tube 2, a fuel gas inner tube 3 is arranged in the fuel gas shell 1, a gas nozzle 4 is arranged at the end of the inner gas tube 3, a primary air inlet disk 5 is installed at one end of the fuel gas shell 2 and located at the position of the fuel gas nozzle 4, a high-pressure air interface 6 is opened in the center of the upper side of the fuel gas shell 2, a diverter plate 11 is arranged inside the fuel gas shell 2 and located on one side of the primary air inlet disk 5, a secondary air inlet pipe 10 is connected to the outside of the fuel gas shell 1 close to the primary air inlet disk 5, and a burner brick 12 is connected to the outside of the fuel gas shell 2 and located on one side of the primary air inlet disk 5.
[0023] Two ignition electrodes 7 are provided through the axial surface of the gas shell 1 , and the two ignition electrodes 7 penetrate the primary air inlet disk 5 to the two sides of the gas nozzle 4 .
[0024] A gas pressure measuring hole 8 is provided at the center of the lower side of the gas shell 1 and the gas inner tube 3 , and an air pressure measuring hole 9 is provided at the center of the lower side of the air outer tube 2 .
[0025] A gas pressure gauge 13 is installed on the lower side of the gas shell 1 and is connected to the gas pressure measuring hole 8 , and an air pressure gauge 14 is installed on the lower side of the air outer tube 2 and is connected to the air pressure measuring hole 9 .
[0026] The first-stage air inlet disk 5 includes an air inlet disk 501 , and a plurality of air inlet holes 502 are formed on the air inlet disk 501 .
[0027] The gas shell 1 and the air outer pipe 2 are connected by flanges, and the gas shell 1 and the burner brick 12 are connected by flanges.
[0028] The working principle and use process of this utility model:
[0029] Before the combustion operation is performed, it is necessary to connect the high-pressure gas supply device to the air interface 6, connect the high-pressure gas device to the gas inner pipe 3, and connect the ignition electrode 7 to the power supply.
[0030] During combustion operation, the air outer tube 2 introduces high-pressure air for combustion support through the high-pressure air interface 6, and the high-pressure air is conducted to the head end of the air outer tube 2 through the swirl slot 502 on the primary air inlet disk 5. At the same time, the high-pressure combustible gas is connected through the gas inner tube 3. When the high-pressure gas reaches the end of the gas inner tube 2, it is evenly and dispersedly ejected through the jet holes on the gas nozzle 4, and is evenly and fully mixed with the high-pressure air ejected from the swirl slot 502. When high-voltage electricity is passed through the two ignition electrodes 7, discharge is carried out on both sides of the gas nozzle 4 to ignite the mixed gas of the high-pressure gas ejected from the gas nozzle 4 and the high-pressure air ejected from the swirl slot 4, thereby realizing the ignition operation. At the same time, after the high-pressure air is divided by the diverter plate 11, a part of it enters the front end of the gas nozzle 4 through the secondary air inlet pipe 11 to ensure that the gas is fully burned.
[0031] Among them, a gas pressure measuring hole 8 is opened in the center of the lower side of the gas shell 1 and the gas inner tube 3, and a gas pressure gauge 13 is installed on the lower side of the gas shell 1 and connected with the gas pressure measuring hole 8; an air pressure measuring hole 9 is opened in the center of the lower side of the air outer tube 2, and an air pressure gauge 14 is installed on the lower side of the air outer tube 2 and connected with the air pressure measuring hole 9. The pressure flow and flow rate of the high-pressure gas are accurately detected by the gas pressure gauge 13 and the air pressure gauge 14, so as to realize the controllable delivery of the gas and achieve the purpose of controlling the combustion power and combustion temperature.
[0032] By using segmented high-pressure air to assist combustion in the clarification zone of the kiln, the fuel gas is fully burned, the water vapor content in the flue gas is reduced, the reaction of unsaturated Si-0 in the glass with water vapor is reduced, and the generation of silanol groups Si-OH is reduced. At the same time, the reaction with oxygen is increased, saturating the Si-0 structure of the glass, thereby reducing the generation of bubbles on the glass surface and improving the quality of the finished glass. When the glass liquid subsequently enters the tin bath, due to the reduction of silanol groups Si-OH in the glass liquid, the amount of reaction with hydrogen in the tin bath will also be reduced, and the open bubbles under the glass will be reduced accordingly, thereby improving the appearance quality of the glass.
[0033] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.
Claims
1. A device for reducing the hydroxyl content of glass in an oxygen furnace, comprising a fuel gas shell (1), one end of the fuel gas shell (1) being connected to an air outer pipe (2), characterized in that: The gas shell (1) is provided with a gas inner tube (3), the end of the gas inner tube (3) is provided with a gas nozzle (4), one end of the air outer tube (2) is provided with a primary air intake disk (5) at the position of the gas nozzle (4), a high-pressure air interface (6) is provided at the center of the upper side of the air outer tube (2), a flow divider (11) is provided inside the air outer tube (2) and at one side of the primary air intake disk (5), a secondary air intake pipe (10) is externally connected to one side of the air outer tube (2) close to the primary air intake disk (5), and a burner brick (12) is connected to the outer side of the air outer tube (2) and at one side of the primary air intake disk (5).
2. The device for reducing the hydroxyl content of glass in an oxygen furnace according to claim 1, characterized in that: Two ignition electrodes (7) are provided through the axial surface of the gas shell (1), and the two ignition electrodes (7) penetrate the primary air inlet disk (5) to the two sides of the gas nozzle (4).
3. The device for reducing the hydroxyl content of glass in an oxygen furnace according to claim 1, characterized in that: A gas pressure measuring hole (8) is provided at the center of the lower side of the gas shell (1) and the gas inner tube (3), and an air pressure measuring hole (9) is provided at the center of the lower side of the air outer tube (2).
4. The device for reducing the hydroxyl content of glass in an oxygen furnace according to claim 2, characterized in that: A gas pressure gauge (13) is installed on the lower side of the gas shell (1) and is connected to the gas pressure measuring hole (8), and an air pressure gauge (14) is installed on the lower side of the air outer tube (2) and is connected to the air pressure measuring hole (9).
5. The device for reducing the hydroxyl content of glass in an oxygen furnace according to claim 1, characterized in that: The first-stage air inlet disk (5) comprises an air inlet disk (501), and a plurality of air inlet holes (502) are provided on the air inlet disk (501).
6. The device for reducing the hydroxyl content of glass in an oxygen furnace according to claim 1, characterized in that: The gas casing (1) and the air outer pipe (2) are connected by flanges, and the gas casing (1) and the burner brick (12) are connected by flanges.