Glass furnace sealing device and sealing method thereof

Abstract

The application provides a glass kiln sealing device which is not prone to generating volatile substances and has no risk of body material falling, comprising a cooling device, an insulation device and a connecting device, the cooling device is arranged on the insulation device, and the cooling device and the insulation device are connected together through the connecting device, the cooling device is internally provided with a cooling cavity, the cooling device is provided with a cooling medium inlet support rod and a cooling medium outlet support rod, and the cooling medium inlet support rod and the cooling medium outlet support rod are respectively communicated with the cooling cavity and constitute a cooling channel, the insulation device is composed of a partition plate and a cover plate, and the partition plate is arranged on the cover plate. The insulation device of the glass kiln sealing device adopts a composite structure, is not prone to generating volatile substances, can effectively reduce the risk of body material falling, and thus high-quality glass products are obtained; the kiln wall hole can be sealed, the heat loss in the kiln is reduced, and heat stability during kiln operation is achieved.

Description

Technical Field

[0001] This invention relates to a sealing device for a glass furnace used in the glass melting process, and a sealing method using the sealing device to reduce internal heat loss and improve glass quality during furnace operation. Background Technology

[0002] In the glass melting process, the glass furnace, as a reaction vessel for melting powder and forming a cryogenic eutectic, is characterized by its relatively enclosed space, which minimizes heat loss. Simultaneously, to maintain the heat required for the glass reaction at high temperatures, the furnace is continuously replenished with heat through combustion, electric heating, or other methods to ensure its stable operation at the specified temperature. For single-crucible furnaces where key processes such as melting, refining, and homogenization are all completed within the same space, the furnace's airtightness is crucial. However, during process execution, to address process requirements such as improving the uniformity of glass melting and observing the internal space and liquid level, perforations are typically made in the furnace wall, and devices such as stirrers, bubble tubes, industrial television lenses, and laser level gauges are added to assist in the glass production process, ensuring stable and controllable glass production conditions.

[0003] Currently, the sealing method for openings in the kiln wall is to directly seal the openings with refractory material of a certain shape to prevent heat loss from the kiln. However, refractory material sealing requires frequent replacement, and there is a possibility that uneven heating and cooling at high temperatures could cause the material to crack and fall into the molten glass in the kiln, forming stone defects. Furthermore, the accumulation of volatiles from the molten glass inside the kiln can easily cause the sealing bricks to melt and adhere to the surrounding refractory material at high temperatures, rendering the wall openings unusable, thus affecting process execution and glass production quality. Figure 1 As shown, existing glass production furnaces typically consist of key components such as the furnace body 2, electrodes 3, a lance 4, a charging port 5, and a molten glass outlet 6. In the glass melting process, powder, glass slag, and their mixtures are added to the furnace interior through the charging port 5. Through high-temperature chemical and physical reactions, molten glass 7 is formed. The molten glass 7 is heated by the combustion of gas supplied by the lance 4 and by the heat directly supplied by the electrodes 3, achieving high-temperature process temperature control. To meet specific process requirements, such as stirring, bubbling, liquid level monitoring, and high-temperature furnace observation, furnace wall openings 8 need to be added to the furnace body 2 to achieve these requirements. In the existing production process, the sealing of the furnace wall openings 8 is mainly achieved by directly sealing with refractory material 1. This method is simple and feasible for sealing non-critical locations, but it is prone to generating volatiles during long-term use. It may even cause the sealing material to adhere to the furnace body at high temperatures, making it difficult to reuse the furnace wall openings 8 for a long time. In addition, there is a risk that the refractory material 1 used for sealing may fall off and into the molten glass 7, which may disrupt the melting balance of the molten glass 7, thereby reducing the melting quality and yield. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a glass furnace sealing device that is not prone to generating volatiles and has no risk of falling off the main body material.

[0005] The present invention also provides a sealing method using the above-mentioned glass furnace sealing device.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a glass furnace sealing device, including a cooling device, a heat preservation device, and a connecting device. The cooling device is installed on the heat preservation device, and the cooling device and the heat preservation device are connected together by the connecting device. A cooling chamber is provided inside the cooling device. A cooling medium inlet support rod and a cooling medium outlet support rod are provided on the cooling device. The cooling medium inlet support rod and the cooling medium outlet support rod are respectively connected to the cooling chamber and form a cooling channel. The heat preservation device is composed of an isolation plate and a cover plate. The isolation plate is installed on the cover plate.

[0007] Furthermore, the cover plate consists of an insulation layer and an outer cavity, with the outer cavity completely enclosing the insulation layer.

[0008] Furthermore, the cooling chamber is equipped with a baffle that plans the directional flow path of the cooling medium.

[0009] Furthermore, a first connecting hole is provided on the cooling device, and a second connecting hole is provided on the heat preservation device. The connecting device passes through the first connecting hole and the second connecting hole, so that the cooling device and the heat preservation device are tightly fitted together to form a whole.

[0010] Furthermore, the connecting device consists of a connecting rod, an insulating sleeve, an insulating ring, and a fixing washer. The insulating sleeve and the insulating ring are fitted onto the upper part of the connecting rod, the insulating ring is located at the upper end of the insulating sleeve, and the fixing washer is located at the upper end of the insulating ring.

[0011] Furthermore, the diameter of the first connecting hole is larger than the diameter of the insulating sleeve, the diameter of the second connecting hole is larger than the diameter of the connecting rod but smaller than the diameter of the insulating sleeve, and the diameter of the insulating ring is larger than the diameter of the first connecting hole, so that the insulating sleeve is located in the first connecting hole of the cooling device and the insulating ring is located on the upper surface of the cooling device.

[0012] Furthermore, the cooling medium inlet support rod and the cooling medium outlet support rod are disposed on the upper surface or side of the cooling device.

[0013] Furthermore, it also includes through holes that penetrate the cooling device and the heat preservation device.

[0014] Furthermore, the cooling device is made of heat-resistant metal material, preferably nickel-chromium alloy; the wall thickness of the material used to manufacture the cooling chamber is 1-6 mm, preferably 2-4 mm; the cooling chamber is made of metal material with a room temperature thermal conductivity of not less than 10 W / (m·K), preferably metal material with a room temperature thermal conductivity of 15 W / (m·K) or higher; the isolation plate is made of insulation material with a thickness of 5-20 mm, preferably non-metallic insulation material with a room temperature thermal conductivity of not more than 2 W / (m·K), preferably mica board, mullite insulation brick, or fused silica brick; the insulation layer is made of fiberboard composed of zirconia fiberboard, aluminosilicate fiberboard, or a mixture of the above fibers, preferably fiberboard with a room temperature thermal conductivity of not more than 0.3 W / (m·K), and preferably with a bulk density of 300-700 kg / m³. 3 The material is made of a material in which the organic matter content by mass does not exceed 2%; the insulating sleeve and insulating ring are made of corundum or fused silica; the outer cavity of the cover plate, the connecting rod, and the fixing gasket are made of platinum metal and its reinforcing materials, preferably platinum-rhodium alloy or platinum-rhodium dispersion material, and more preferably platinum alloy.

[0015] Furthermore, a total of 2-8 cooling medium inlet support rods and cooling medium outlet support rods are provided, and the diameter of the cooling medium inlet support rods and cooling medium outlet support rods is 8-20mm; the height of the cover plate is 30-200mm, preferably 50-100mm; 2-10 connecting devices are provided, and the connecting devices pass through the first connecting hole on the cooling device and the second connecting hole on the insulation device in sequence, and the connecting rods are connected and fixed to the outer cavity of the cover plate of the insulation device by welding; when platinum metal and its reinforcing materials are used to make the outer cavity of the cover plate, the connecting rods, and the fixing gaskets, the wall thickness of the material of the outer cavity of the cover plate and the fixing gaskets is 0.25-2.5mm, preferably 0.5-2.0mm, and the diameter of the connecting rods is 5-20mm; the connecting rods are hollow tube structures, and the diameter of the connecting rods is 10-20mm, and the wall thickness of the hollow tubes is not less than 2mm.

[0016] The sealing method using the above-mentioned glass furnace sealing device includes the following steps:

[0017] 1) Connect the cooling medium inlet support rod and the cooling medium outlet support rod in the cooling device to the dedicated cooling medium pipeline of the production line, respectively, to ensure that the cooling medium inlet support rod and the cooling medium outlet support rod have the structural strength to support the cooling device, the heat preservation device and the connecting device after the pipeline is connected.

[0018] 2) After the cooling medium flows through the external pipeline, it can smoothly flow into the cooling chamber through the cooling medium inlet support rod, and flow in a direction in the flow channel formed by the inner wall of the cooling chamber and the baffle. After fully contacting the cooling chamber, the cooling medium is discharged from the cooling medium outlet support rod.

[0019] 3) Detect the temperature and flow rate of the cooling medium at the inlet support rod and outlet support rod to ensure stable flow of the cooling medium and ensure that the heat inside the cooling chamber is transferred through convective heat transfer during operation and carried away from the sealing device.

[0020] 4) Determine the location of the opening in the kiln wall, place the lower surface of the cover plate directly above the opening in the kiln wall, and fix the sealing device according to the location of the opening in the kiln wall. When the opening is located at the top of the kiln, fit the lower surface of the cover plate against the opening in the kiln wall; when the opening is located on the side wall or the inclined surface of the outer wall of the kiln, use the cooling medium inlet support rod and the cooling medium outlet support rod as support points to fit the lower surface of the cover plate against the opening in the kiln wall.

[0021] 5) After installation, the temperature and flow rate of the cooling medium are controlled within the range required by the process. During the production process, the heat inside the kiln is transferred to the insulation device through the kiln wall openings, and the heat transmission rate is greatly reduced by the insulation effect of the insulation layer. At the same time, a small amount of heat is transferred to the cooling medium through the cooling chamber through the insulation device and then discharged in time.

[0022] Furthermore, the directional flow in step 2) is as follows: the cooling medium enters the cooling chamber through the cooling medium inlet support rod, and the directional flow channel of the cooling medium is set to a single-channel unidirectional flow mode through the inner wall of the cooling chamber and the partition.

[0023] Furthermore, in step 2), the cooling medium is compressed air, oxygen, nitrogen, water, or oil, and the temperature difference between the cooling medium in the cooling medium inlet support rod and the cooling medium outlet support rod does not exceed 30°C, preferably within 20°C; when the cooling medium is gas, the pressure of the gas before entering the cooling medium inlet support rod is 0.3-0.7 MPa, preferably compressed gas with a temperature below 35°C; when the cooling medium is liquid, the pressure of the liquid before entering the cooling medium inlet support rod is 0.3-0.5 MPa, and the temperature of the liquid before entering the cooling medium inlet support rod is 25-45°C.

[0024] Furthermore, in step 4), the aperture of the kiln wall holes is φ100mm or larger; in step 5), the internal temperature of the kiln is 1600℃ during the production process.

[0025] The beneficial effects of this invention are as follows: The heat preservation device of the glass furnace sealing device of this invention adopts a composite structure, which is not prone to generating volatiles and can effectively reduce the risk of the main body material falling off, thereby obtaining high-quality glass products; it can seal the openings in the furnace wall, reduce heat loss inside the furnace, and achieve heat stability during furnace operation; the heat exchange formed by the directional flow of the cooling medium in the cooling device removes the heat in the sealing device from the system, realizing effective sealing and fixing of openings at any position in the furnace and stable discharge of residual heat transferred from the heat preservation device, thereby achieving safe and effective operation of the sealing device; this invention solves the technical problem of sealing ultra-large furnace wall openings, achieving sealing of large openings with a diameter of φ100mm or more, and has the advantage of long service life. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a glass furnace using existing sealing devices.

[0027] Figure 2 This is a perspective view of the sealing device of the present invention.

[0028] Figure 3 This is a perspective view of the cooling device of the sealing device of the present invention.

[0029] Figure 4 This is a front view of the cooling device of the sealing device of the present invention.

[0030] Figure 5 yes Figure 4 AA cross-section view.

[0031] Figure 6 This is a top view of the cooling device of the sealing device of the present invention.

[0032] Figure 7 yes Figure 6 BB cross-section.

[0033] Figure 8 This is a perspective view of the heat preservation device of the sealing device of the present invention.

[0034] Figure 9 This is a top view of the heat preservation device of the sealing device of the present invention.

[0035] Figure 10 yes Figure 9 CC cross-section view.

[0036] Figure 11 This is a perspective view of the connecting device of the sealing device of the present invention.

[0037] Figure 12 This is a top view of the connecting device of the sealing device of the present invention.

[0038] Figure 13 yes Figure 12 DD cross-section view.

[0039] Figure 14 This is a three-dimensional diagram of another sealing device.

[0040] Figure 15 This is a schematic diagram of a glass furnace structure using the sealing device of the present invention. Detailed Implementation

[0041] like Figure 2 As shown, the sealing device of the present invention includes a cooling device 11, a heat preservation device 12, and a connecting device 13. The cooling device 11 is mounted on the heat preservation device 12, and the cooling device 11 and the heat preservation device 12 are connected together via the connecting device 13. The cooling device 11 contains a cooling chamber 14. A cooling medium inlet support rod 15, a cooling medium outlet support rod 16, and a first connecting hole 17 are provided on the cooling device 11. The cooling medium inlet support rod 15 and the cooling medium outlet support rod 16 are respectively connected to the cooling chamber 14 and form a cooling channel. Figure 3-7 As shown. The heat insulation device 12 consists of an isolation plate 18 and a cover plate 19. The isolation plate 18 is disposed on the cover plate 19. A second connection hole 20 is provided on the heat insulation device 12, as shown. Figure 8-10 As shown; the connecting device 13 passes through the first connecting hole 17 and the second connecting hole 20, so that the cooling device 11 and the heat preservation device 12 are tightly fitted together to form a whole.

[0042] A baffle 21 is installed inside the cooling chamber 14 to plan the directional flow path of the cooling medium and enhance the structural strength of the cooling device 11. The bottom surface of the cooling chamber 14 contacts the upper surface of the baffle 18 of the insulation device 12. Both the side surface and the upper surface of the cooling chamber 14 can contact the surrounding atmosphere and directly exchange heat. The cooling medium inlet support rod 15 and the cooling medium outlet support rod 16 serve as connection channels between the cooling medium and the external cooling source, realizing the function of introducing and discharging the cooling medium in the cooling device 11. They can also be used as the mechanical support structure of the overall sealing device. A total of 2-8 cooling medium inlet support rods 15 and 16 can be installed depending on the cooling medium flow rate of the cooling chamber 14 and the overall weight of the sealing device. The cooling medium inlet support rods 15 and 16 can be installed on the upper surface of the cooling device 11, such as... Figure 2As shown, it can also be disposed on the side of the cooling device 11. The first connecting hole 17 penetrates the bottom surface and the top surface of the cooling cavity 14. The sidewall thickness of the first connecting hole 17 is controlled at 3-6 mm. The diameter and number of the first connecting holes 17 are determined by the size and number of the connecting devices 13. The cooling cavity 14 also indirectly cools the connecting devices 13 through the first connecting hole 17, ensuring that the deformation of the connecting devices 13 can be controlled within the linear deformation region when operating at high temperatures, without structural damage.

[0043] When the aforementioned cooling chamber 14 is in operation, the cooling medium enters the cooling chamber 14 through the cooling medium inlet support rod 15. The flow path is restricted by the inner wall of the cooling chamber 14 and the baffle 21, ensuring that the cooling medium flows within the cooling chamber 14 according to the specified path. Figure 5 The flow direction indicated by the arrow ensures that heat inside the cooling chamber 14 is carried away from the sealing device by the cooling medium during operation. To ensure cooling effectiveness, the directional flow channel of the cooling medium is preferably configured as a single-channel unidirectional flow, such as... Figure 5 As shown, this design prevents thermal stress caused by differences in the flow of the cooling medium inside the cooling chamber 14, which could lead to localized overheating of the cooling device 11, resulting in decreased structural strength or weld cracks and leakage of the cooling medium. The aforementioned directional flow channel design for the cooling medium ensures stable surface convection heat transfer between the cooling medium and various surfaces of the chamber, thereby stabilizing the operating temperature of the cooling device 11. This facilitates rapid heat exchange with the insulation plate 18, connecting device 13, and the surrounding environment of the insulation device 12, effectively improving the overall reliability and operational stability of the sealing device.

[0044] The cooling medium supplied through the cooling medium inlet support rod 15 is preferably a gas or a liquid. When a gas is selected as the cooling medium, compressed air, oxygen, nitrogen, or other cooling gases are preferred; when a liquid is selected as the cooling medium, water, oil, or other liquid materials with high specific heat are preferred. When designing the cooling medium inlet support rod 15 and the cooling medium outlet support rod 16, it should be ensured that the temperature difference between the cooling medium in the cooling medium inlet support rod 15 and the cooling medium outlet support rod 16 does not exceed 30℃, and preferably is within 20℃. When the cooling medium is a gas, the pressure of the gas before entering the cooling medium inlet support rod 15 is preferably 0.3-0.7 MPa, thereby ensuring that the gas flow rate is sufficient to meet the cooling requirements of the sealing device. From a safe operation perspective, the gas source used for the cooling medium is preferably compressed gas with a temperature below 35℃, thereby ensuring the heat exchange effect on the surface of the cooling chamber 14 and the controllable temperature rise of the subsequently discharged gas. When the cooling medium is a liquid, the pressure of the liquid before entering the cooling medium inlet support rod 15 is preferably 0.3-0.5 MPa, thereby ensuring that the liquid flow rate meets the cooling requirements of the sealing device. The temperature of the liquid before entering the cooling medium inlet support rod 15 is preferably controlled between 25-45℃ to ensure that there is no condensation on the outer surface of the cooling chamber 14. When designing the dimensions of the cooling medium inlet support rod 15 and the cooling medium outlet support rod 16, it is preferable that the diameter of the cooling medium inlet support rod 15 and the cooling medium outlet support rod 16 is 8-20mm to ensure that the cooling medium flow rate meets the requirements of the sealing device.

[0045] All cooling devices 11 are made of heat-resistant metal materials. The selected materials must possess excellent resistance to glass volatiles, high thermal conductivity, ease of welding, and high-temperature resistance. Specifically, cooling devices 11 are preferably made of nickel-chromium alloy. To ensure sufficient mechanical strength of the cooling devices 11, the wall thickness of the material used to make the cooling chamber 14 is preferably 1-6 mm, and most preferably 2-4 mm. To ensure efficient heat exchange between the cooling medium and the various surfaces of the cooling chamber 14, the material of the cooling chamber 14 is preferably a metal with a room temperature thermal conductivity of not less than 10 W / (m·K), and more preferably a metal with a room temperature thermal conductivity of 15 W / (m·K) or higher.

[0046] The aforementioned heat preservation device 12 is disposed between the outer surface of the kiln wall hole 8 and the cooling device 11. The isolation plate 18 is located between the cover plate 19 and the cooling chamber 14. The cover plate 19 is located between the isolation plate 18 and the outer surface of the kiln wall hole 8, with the lower surface of the cover plate 19 in contact with the outer surface of the kiln wall hole 8. The side of the isolation plate 18 serves as an auxiliary heat dissipation surface. The second connecting hole 20 penetrates the upper and lower surfaces of the isolation plate 18. The diameter and number of the second connecting holes 20 are determined by the size and number of the connecting devices 13. The isolation plate 18 has heat insulation and electrical insulation functions in the heat preservation device 12 and can withstand the pressure of the cooling device 11. Therefore, the isolation plate 18 is preferably made of heat preservation material with a thickness of 5-20mm. To ensure the heat insulation function of the isolation plate 18, it is preferably made of non-metallic heat preservation material with a thermal conductivity of no more than 2w / (m·K) at room temperature. Because the ambient temperature of its use is high, it is also necessary to ensure that the selected material can be used for a long time at an ambient temperature above 500℃. Based on actual on-site testing, the preferred materials for the isolation board 18 are mica board, mullite insulation bricks, and fused quartz bricks.

[0047] The aforementioned cover plate 19 consists of an insulation layer 22 and an outer cavity 23, such as Figure 10 As shown, the outer cavity 23 completely encloses the insulation layer 21. The overall design height of the cover plate 19 should be controlled between 30-200mm, preferably 50-100mm, to control the structural weight of the entire sealing device. The insulation layer 22, as the filler of the outer cavity 23, is made of fiberboard material with excellent thermal insulation properties, preferably zirconia fiberboard, aluminosilicate fiberboard, or a mixture of the above fibers. The insulation layer 22 is preferably made of fiberboard with a room temperature thermal conductivity not exceeding 0.3w / (m·K). Regarding material density control, the bulk density of the insulation layer 22 is preferably 300-700kg / m³. 3 Within the specified range, in addition, to extend the service life of the outer cavity 23, it is preferable that the organic matter content in the material of the insulation layer 22 does not exceed 2% by mass. The second connecting hole 20 penetrates the upper and lower surfaces of the cover plate 19.

[0048] The aforementioned connecting device 13 consists of a connecting rod 24, an insulating sleeve 25, an insulating ring 26, and a fixing washer 27. The insulating sleeve 25 and the insulating ring 26 are fitted onto the upper part of the connecting rod 24. The insulating ring 26 is located at the upper end of the insulating sleeve 25, and the fixing washer 27 is located at the upper end of the insulating ring 26. Figure 11-13As shown. The connecting device 13 passes sequentially through the first connecting hole 17 on the cooling device 11 and the second connecting hole 20 on the insulation device 12, and can be welded to connect and fix the connecting rod 24 to the outer cavity 23 of the cover plate 19 of the insulation device 12. The diameter of the first connecting hole 17 is larger than the diameter of the insulating sleeve 25, the diameter of the second connecting hole 20 is larger than the diameter of the connecting rod 24 but smaller than the diameter of the insulating sleeve 25, and the diameter of the insulating ring 26 is larger than the diameter of the first connecting hole 17, thereby ensuring that the connecting rod 24 can pass smoothly through the insulation device 12, and that the insulating sleeve 25 is located in the first connecting hole 17 of the cooling device 11, and the insulating ring 26 is located on the upper surface of the cooling device 11. Preferably, 2-10 connecting devices 13 are provided to achieve structural support and functional association between the cooling device 11 and the insulation device 12. The main function of the insulating sleeve 25 and the insulating ring 26 is to insulate and isolate the metal parts of the cooling device 11 and the insulation device 12, and at the same time, to buffer the heat between the connecting rod 24 and the cooling device 11. Taking into account the stress support and temperature resistance requirements of the insulating sleeve 25 and the insulating ring 26, common materials such as corundum and fused silica can be used to make them.

[0049] The outer cavity 23, connecting rod 24, and fixing gasket 27 of the aforementioned cover plate 19 should be made of precious metals that have good resistance to high-temperature glass volatile corrosion, do not pollute the glass at high temperatures, have good mechanical strength, and exhibit low creep and deformation within the high-temperature range in which they are used. Specifically, they can be made of platinum metal and its reinforcing materials, or they can be made of platinum-rhodium alloy or platinum-rhodium dispersion materials with superior strength and stable high-temperature performance, or they can be made of platinum alloy with excellent ductility and stable high-temperature performance. When platinum metal and its reinforcing materials are used to make the outer cavity 23, connecting rod 24, and fixing gasket 27 of the cover plate 19, the preferred wall thickness of the material for the outer cavity 23 and fixing gasket 27 of the cover plate 19 is 0.25-2.5mm, and the most preferred wall thickness is 0.5-2.0mm. The preferred diameter of the connecting rod 24 is 5-20mm. To reduce manufacturing costs, the connecting rod 24 can be made into a hollow tube structure. In this case, the diameter of the connecting rod 24 should be controlled to be 10-20mm, and the wall thickness of the hollow tube should not be less than 2mm.

[0050] exist Figure 14 Another implementation example of a sealing device is provided, which further includes a through hole 28 that penetrates the cooling device 11 and the heat preservation device 12. Using a sealing device with a through hole 28 in conjunction with a kiln wall opening 8 added to the kiln body 2 can meet specific process requirements, such as the need for equipment for stirring, bubbling, liquid level monitoring, and high-temperature furnace observation to directly enter the kiln through the through hole 28 and the kiln wall opening 8.

[0051] When a glass furnace operates at high temperatures, heat leaks out through the furnace wall openings 8, resulting in poor temperature uniformity and stability within the furnace space. Therefore, by adding the sealing device of this invention to the furnace wall openings 8, the high-temperature radiant heat inside the furnace is restricted by the sealing device. Some of the heat is directly reflected back into the furnace, while the remaining heat enters the sealing device and is first significantly reduced by the heat insulation device 12 installed on the sealing device. The remaining heat is then transferred to the bottom surface of the cooling device 11 cavity via the isolation plate 18. Finally, the heat exchange formed by the directional flow of the cooling medium in the cooling chamber 14 removes the heat from the sealing device to the outside of the system, thereby achieving safe and effective operation of the sealing device. The insulation device 12 adopts a composite structure, which can effectively solve the problem of heat leakage from the furnace wall openings 8, and significantly reduce the risk of impurities and stones entering the molten glass. The outer cavity 23 can effectively reduce the loss rate of high-temperature radiant heat inside the furnace, and combined with the insulation effect of the insulation layer 22, it can further reduce the problem of heat leakage from the furnace. Moreover, the metal outer cavity 23 is in direct contact with the atmosphere inside the furnace, which can effectively reduce the risk of surface component volatilization, material failure and detachment, and the formation of condensed volatiles, thereby extending the service life of the cover plate 19. The cooling device 11, which is in contact with the upper part of the insulation device 12, can effectively seal and fix the openings at any position in the furnace and stably discharge the residual heat transferred by the insulation device 12, so as to achieve safe and effective operation of the sealing device. In terms of the overall structural support of the sealing device, the connecting device 13 organically connects the insulation device 12 and the cooling device 11, so that the cooling device 11 and the insulation device 12 are tightly fitted together to form an integral device. Compared with the prior art, the sealing device of the present invention adopts a combined structure, which can effectively solve the problem of structural failure caused by uneven material cooling during high-temperature use, thus greatly improving its service life.

[0052] The sealing method for sealing the hole 8 in the kiln wall using the sealing device of the present invention includes the following steps:

[0053] 1) Connect the cooling medium inlet support rod 15 and the cooling medium outlet support rod 16 in the cooling device 11 to the production line dedicated cooling medium pipeline respectively, and at the same time ensure that the cooling medium inlet support rod 15 and the cooling medium outlet support rod 16 have the structural strength to support the cooling device 11, the heat preservation device 12 and the connecting device 13 after connecting the pipeline.

[0054] 2) After the pipeline is connected, the cooling medium flows smoothly through the external pipeline and into the cooling chamber 14 through the cooling medium inlet support rod 15. It flows in a direction in the flow channel formed by the inner wall of the cooling chamber 14 and the partition 21. After fully contacting the cooling chamber 14, the cooling medium is discharged from the cooling medium outlet support rod 16.

[0055] 3) Detect the temperature and flow rate of the cooling medium at the cooling medium inlet support rod 15 and the cooling medium outlet support rod 16 to ensure stable flow of the cooling medium and ensure that the heat inside the cooling chamber 14 is transferred through the flow of the cooling medium to generate convective heat transfer during operation and is carried away from the sealing device.

[0056] 4) Determine the location of the hole 8 in the kiln wall, install the sealing device of this invention on site, place the lower surface of the cover plate 19 of the sealing device directly above the hole 8 in the kiln wall, and fix the sealing device according to the location of the hole 8 in the kiln wall. When the opening is at the top of the kiln, the lower surface of the cover plate 19 of the sealing device can usually be directly attached to the hole 8 in the kiln wall. Figure 15 As shown; when the opening is located on the side wall or the inclined surface of the outer wall of the kiln, the cooling medium inlet support rod 15 and the cooling medium outlet support rod 16 in the sealing device can be used as support points to fit the lower surface of the cover plate 19 of the sealing device with the opening 8 of the kiln wall.

[0057] 5) After installation, control the temperature and flow rate of the cooling medium within the process requirements to ensure that the heat in the sealing device is discharged in a timely manner. This heat comes from the heat inside the kiln during the production process. Part of this heat is transferred to the insulation device 12 through the kiln wall opening 8, and the heat transmission rate can be greatly reduced by the insulation effect of the insulation layer 22; a small amount of heat that passes through the insulation device 12 is then transferred to the cooling medium through the cooling chamber 14, thereby reducing the heat loss of the kiln and improving the airtightness of the kiln.

[0058] Using the above sealing method, the sealing device of the present invention can achieve sealing of large holes (φ100mm or larger) in the furnace wall openings 8, while effectively reducing heat loss caused by openings. Using the above sealing method, the sealing device of the present invention can be used for long-term sealing of openings in the furnace wall used for ultra-high temperature glass melting at 1600℃, without the need for frequent replacement of the sealing device.

Claims

1. A sealing device for a glass furnace, characterized in that, The device includes a cooling device (11), a heat preservation device (12), and a connecting device (13). The cooling device (11) is mounted on the heat preservation device (12), and the cooling device (11) and the heat preservation device (12) are connected together by the connecting device (13). The cooling device (11) has a cooling chamber (14). A cooling medium inlet support rod (15) and a cooling medium outlet support rod (16) are mounted on the cooling device (11), and the cooling medium inlet support rod (15) and the cooling medium outlet support rod (16) are respectively connected to the cooling chamber (14) and form a cooling channel. The heat preservation device (12) is composed of an isolation plate (18) and a cover plate (19). The isolation plate (18) is mounted on the cover plate (19). The connecting device (13) consists of a connecting rod (2) 4) The insulating sleeve (25), insulating ring (26) and fixing gasket (27) are used. The insulating sleeve (25) and insulating ring (26) are fitted on the upper part of the connecting rod (24). The insulating ring (26) is set on the upper end of the insulating sleeve (25). The fixing gasket (27) is set on the upper end of the insulating ring (26). The cover plate (19) is composed of a heat insulation layer (22) and an outer cavity (23). The outer cavity (23) completely covers the heat insulation layer (22). A first connecting hole (17) is provided on the cooling device (11). A second connecting hole (20) is provided on the heat insulation device (12). The connecting device (13) passes through the first connecting hole (17) and the second connecting hole (20) so that the cooling device (11) and the heat insulation device (12) fit tightly together to form a whole.

2. The glass furnace sealing device as described in claim 1, characterized in that, The cooling chamber (14) is equipped with a baffle (21) that plans the directional flow path of the cooling medium.

3. The glass furnace sealing device as described in claim 1, characterized in that, The diameter of the first connecting hole (17) is greater than the diameter of the insulating sleeve (25), the diameter of the second connecting hole (20) is greater than the diameter of the connecting rod (24) but smaller than the diameter of the insulating sleeve (25), and the diameter of the insulating ring (26) is greater than the diameter of the first connecting hole (17), so that the insulating sleeve (25) is located in the first connecting hole (17) of the cooling device (11) and the insulating ring (26) is located on the upper surface of the cooling device (11).

4. The glass furnace sealing device as described in claim 1, characterized in that, The cooling medium inlet support rod (15) and the cooling medium outlet support rod (16) are provided on the upper surface or side of the cooling device (11).

5. The glass furnace sealing device as described in claim 1, characterized in that, It also includes a through hole (28) that penetrates the cooling device (11) and the heat preservation device (12).

6. The glass furnace sealing device as described in claim 1, characterized in that, The cooling device (11) is made of heat-resistant metal material; the wall thickness of the material used to make the cooling cavity (14) is 1-6 mm; the cooling cavity (14) is made of metal material with a thermal conductivity of not less than 10 W / (m·K) at room temperature; the isolation plate (18) is made of insulation material with a thickness of 5-20 mm; the insulation layer (22) is made of fiberboard composed of zirconia fiberboard, aluminosilicate fiberboard or a mixture of the above fibers; the insulating sleeve (25) and the insulating ring (26) are made of corundum or fused silica; the outer cavity (23), connecting rod (24), and fixing gasket (27) of the cover plate (19) are made of platinum metal and its reinforcing materials.

7. The glass furnace sealing device as described in claim 1, characterized in that, The cooling device (11) is made of nickel-chromium alloy; the wall thickness of the material used to make the cooling cavity (14) is 2-4 mm; the cooling cavity (14) is made of metal material with a thermal conductivity of 15 W / (m·K) or higher at room temperature; the isolation plate (18) is made of non-metallic insulation material with a thermal conductivity of no more than 2 W / (m·K) at room temperature; the insulation layer (22) is made of fiberboard with a thermal conductivity of no more than 0.3 W / (m·K) at room temperature; the outer cavity (23), connecting rod (24), and fixing gasket (27) of the cover plate (19) are made of platinum-rhodium alloy or platinum-rhodium dispersion material.

8. The glass furnace sealing device as described in claim 1, characterized in that, The isolation panel (18) is made of mica board, mullite insulating brick or fused silica brick; the insulation layer (22) is made of material with a bulk density of 300-700 kg / m³. 3 The material is made of platinum alloy; the outer cavity (23), connecting rod (24), and fixing gasket (27) of the cover plate (19) are made of platinum alloy.

9. The glass furnace sealing device as described in claim 1, characterized in that, The organic matter content in the insulation layer (22) material does not exceed 2% by mass.

10. The glass furnace sealing device as described in claim 1, characterized in that, A total of 2-8 cooling medium inlet support rods (15) and cooling medium outlet support rods (16) are provided, and the diameter of the cooling medium inlet support rods (15) and cooling medium outlet support rods (16) is 8-20mm; the height of the cover plate (19) is 30-200mm; 2-10 connecting devices (13) are provided, and the connecting devices (13) pass through the first connecting hole (17) on the cooling device (11) and the second connecting hole (20) on the heat preservation device (12) in sequence, and the connecting rods (24) are connected by welding. The outer cavity (23) of the cover plate (19) of the heat preservation device (12) is connected and fixed; when the outer cavity (23), connecting rod (24) and fixing gasket (27) of the cover plate (19) are made of platinum metal and its reinforcing materials, the wall thickness of the material of the outer cavity (23) and fixing gasket (27) of the cover plate (19) is 0.25-2.5mm, and the diameter of the connecting rod (24) is 5-20mm; the connecting rod (24) is a hollow tube structure, and the diameter of the connecting rod (24) is 10-20mm, and the wall thickness of the hollow tube is not less than 2mm.

11. The glass furnace sealing device as described in claim 1, characterized in that, The height of the cover plate (19) is 50-100mm; when the outer cavity (23), connecting rod (24), and fixing gasket (27) of the cover plate (19) are made of platinum metal and its reinforcing materials, the wall thickness of the material of the outer cavity (23) and fixing gasket (27) of the cover plate (19) is 0.5-2.0mm.

12. The sealing method using the glass furnace sealing device according to claim 1, characterized in that, Includes the following steps: 1) Connect the cooling medium inlet support rod (15) and cooling medium outlet support rod (16) in the cooling device (11) to the production line dedicated cooling medium pipeline respectively, and ensure that the cooling medium inlet support rod (15) and cooling medium outlet support rod (16) have the structural strength to support the cooling device (11), the heat preservation device (12) and the connecting device (13) after connecting the pipeline. 2) After the cooling medium flows through the external pipe, it can smoothly flow into the cooling chamber (14) through the cooling medium inlet support rod (15) and flow in a direction in the flow channel formed by the inner wall of the cooling chamber (14) and the partition (21). After fully contacting the cooling chamber (14), the cooling medium is discharged from the cooling medium outlet support rod (16). 3) Detect the temperature and flow rate of the cooling medium inlet support rod (15) and the cooling medium outlet support rod (16) to ensure stable flow of the cooling medium and ensure that the heat inside the cooling chamber (14) is transferred to the cooling medium through convective heat transfer during operation and carried away from the sealing device. 4) Determine the position of the hole (8) in the kiln wall, place the lower surface of the cover plate (19) directly above the hole (8) in the kiln wall, and fix the sealing device according to the position of the hole (8) in the kiln wall. When the opening is at the top of the furnace, the lower surface of the cover plate (19) is attached to the hole (8) in the kiln wall. When the opening is on the side wall or the inclined surface of the outer wall of the kiln, the lower surface of the cover plate (19) is attached to the hole (8) in the kiln wall using the cooling medium inlet support rod (15) and the cooling medium outlet support rod (16) as support points. 5) After installation, the temperature and flow rate of the cooling medium are controlled within the range required by the process. During the production process, the heat inside the kiln is transferred to the heat insulation device (12) through the kiln wall opening (8), and the heat transmission rate is greatly reduced by the heat insulation effect of the heat insulation layer (22). At the same time, a small amount of heat is transferred to the cooling medium through the heat insulation device (12) and then through the cooling chamber (14), and the heat is discharged in time.

13. The sealing method of the glass furnace sealing device as described in claim 12, characterized in that, Step 2) The directional flow is as follows: the cooling medium enters the cooling chamber (14) through the cooling medium inlet support rod (15), and the directional flow channel of the cooling medium is set to a single-channel unidirectional flow mode through the inner wall of the cooling chamber (14) and the partition (21).

14. The sealing method of the glass furnace sealing device as described in claim 12, characterized in that, Step 2) The cooling medium is compressed air, oxygen, nitrogen, water or oil, and the temperature difference between the cooling medium in the cooling medium inlet support rod (15) and the cooling medium outlet support rod (16) does not exceed 30°C; when the cooling medium is gas, the pressure of the gas before entering the cooling medium inlet support rod (15) is 0.3-0.7 MPa; when the cooling medium is liquid, the pressure of the liquid before entering the cooling medium inlet support rod (15) is 0.3-0.5 MPa, and the temperature of the liquid before entering the cooling medium inlet support rod (15) is 25-45°C.

15. The sealing method of the glass furnace sealing device as described in claim 12, characterized in that, Step 2) The temperature difference between the cooling medium in the cooling medium inlet support rod (15) and the cooling medium outlet support rod (16) is within 20°C; when the cooling medium is gas, compressed gas with a temperature below 35°C is used.

16. The sealing method of the glass furnace sealing device as described in claim 12, characterized in that, Step 4) The aperture of the hole (8) in the kiln wall is above φ100mm; Step 5) During the production process, the internal temperature of the kiln is 1600℃.

Images