0.45mm nitrogen heating device and 0.45mm sealing device at the front end of the tin bath

Abstract

The present invention belongs to the field of glass technology, and more specifically, it relates to a 0.4L nitrogen heating device and 0.4L sealing device at the front end of a tin bath. The heating device includes a heating box, a nitrogen inlet pipe, a nitrogen exhaust pipe and a heat source inlet pipe. The heating box has a heating chamber, a nitrogen inlet, a nitrogen outlet, a heat source inlet and a venting outlet. The heating chamber is provided with a heating pipe; the nitrogen inlet pipe inputs nitrogen into the heating pipe, the nitrogen exhaust pipe discharges the nitrogen in the heating pipe to the air inlet of the 0.4L sealing cover, the heat source inlet pipe introduces the vented gas discharged from the venting port of the tin bath into the heating chamber; the venting outlet is used to discharge the vented gas in the heating chamber. The heating device of the present invention cleverly utilizes the high-temperature exhaust gas discharged during the operation of the tin bath, and uses it as a heating source for the nitrogen of the 0.4L sealing cover, which can effectively heat the nitrogen, thereby heating the low-temperature zone at the front end of the tin bath, reducing or avoiding crystal precipitation, and can also reasonably utilize the waste heat of the high-temperature exhaust gas generated during glass production, which is environmentally friendly and practical.

Description

Technical Field

[0001] The present invention belongs to the field of glass technology, and more specifically, relates to a 0.4-kWh nitrogen heating device at the front end of a tin bath and a 0.4-kWh sealing device. Background Art

[0002] Narrow flow channel float glass production line generally refers to a production line that produces glass using China's Luoyang float glass technology or the UK's Pilkington float glass technology. In the float glass production process, the tin bath is one of the main molding equipment. The tin bath is usually located after the melting process. The molten glass water flows into the tin bath through the runner and the flow channel. It floats, flattens, polishes, forms and cools on the surface of the tin bath filled with molten metal tin liquid. It is then controlled by the edge drawing machine to form glass strips of various specifications required by the market. Finally, it is pulled to the annealing kiln for annealing by the transition roller at the outlet of the tin bath. In the tin bath equipment, the tin bath 0-Bay (i.e. 0-Bay) sealing cover refers to the sealing cover used to seal the space between the front end of the tin bath and the flow channel. Usually, pure nitrogen and other nitrogen gases are continuously introduced on both sides of the 0-Bay sealing cover to form a nitrogen curtain to separate the tin bath and the flow channel atmosphere, such as Figure 1 shown.

[0003] In the above narrow flow channel float glass production process, if Figure 2 As shown, at the junction of the eight-shaped bricks, backing bricks and flow channel bricks on both sides of the front end of the tin bath, the flow of glass water is blocked and easily retained. When the temperature of the retained glass water drops to the glass crystallization temperature range, wollastonite crystallization will begin to appear in the glass water. As the temperature of the glass water fluctuates or the pulling speed of the original glass plate increases, the crystals will flow out from the accumulation areas on both sides of the front end of the tin bath and enter the edge glass forming chute, forming line-bound crystallization defects in the glass ribbon. In severe cases, the line-bound defects may be several millimeters long; and if the crystallization position is at the net cutting width of the glass ribbon, it cannot be cut off with an edge knife, etc., which will directly lead to the scrapping of the glass, seriously affecting the quality of the finished glass and causing large losses. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a 0.4-ounce nitrogen heating device and a 0.4-ounce sealing device at the front end of a tin bath to solve the technical problem in the prior art that during float glass production, glass water is prone to crystallization at the front end of the tin bath, thereby affecting the quality of the finished glass.

[0005] In order to achieve the aforementioned purpose of the present invention, in the related art, the float glass production line adopts the method of increasing the temperature of the glass water in the flow channel, thereby indirectly heating the glass water at the junction of the eight-shaped brick-backing brick-flow channel brick at the front end of the tin bath, so that the temperature of the retained glass water does not drop to the crystallization temperature, thereby reducing the amount of precipitated wollastonite crystals. Although this method can reduce the amount of crystal precipitation to a certain extent, due to the limitation of the tin bath structure setting, the temperature of the glass water at the front end of the tin bath cannot be greatly increased (generally only about 20°C at most). If the temperature of the glass water at the front end of the tin bath is too high, it will cause the cooling water in the tin bath to insufficiently cool the glass ribbon, affecting the cooling and forming effect of the glass ribbon. In severe cases, it may even cause the temperature at the outlet of the tin bath to be out of control, resulting in scratches, crushing or more serious quality defects such as tin ash induction on the glass, causing greater quality losses. Based on this, the inventors of this application focused on how to effectively reduce the amount of crystallization at the front end of the tin bath and reduce the impact of crystallization on the glass quality without affecting the cooling effect of the cooling water bag in the tin bath on the glass ribbon. They also conducted in-depth research on narrow flow channel float glass production lines and provided the following technical solutions based on the experimental results.

[0006] The technical solution adopted by the present invention is: to provide a 0.05-liter nitrogen heating device at the front end of a tin bath, comprising:

[0007] A heating box, the heating box having a heating chamber, a nitrogen inlet, a nitrogen outlet and a heat source inlet connected to the heating chamber, and a heating pipe connected to the nitrogen inlet and the nitrogen outlet is arranged in the heating chamber;

[0008] A nitrogen inlet pipe, connected to the nitrogen inlet, for inputting nitrogen into the heating tube;

[0009] A nitrogen exhaust pipe is connected to the nitrogen outlet and is used to discharge the nitrogen in the heating tube to the air inlet of the 0 Bei sealing cover;

[0010] The heat source inlet pipe is connected to the heat source inlet and is used to introduce the exhaust gas discharged from the exhaust port of the tin bath into the heating chamber;

[0011] The heating box also has a venting outlet connected to the heating chamber, and the venting outlet is used to discharge the venting gas entering the heating chamber.

[0012] In some embodiments, the heating tube includes a plurality of heating tube segments connected in sequence, and the plurality of heating tube segments are spirally disposed in the heating chamber.

[0013] In some embodiments, the heating box has a first side wall and a second side wall that are arranged opposite to each other, the heat source inlet is arranged at one end of the first side wall, and the dissipation outlet is arranged at an end of the second side wall away from the heat source inlet.

[0014] In some embodiments, the outer wall surface of the heating box and the outer wall surface of the nitrogen exhaust pipe are both covered with an insulation layer.

[0015] In some embodiments, the insulation layer is an aluminum silicate fiber wool insulation layer, a ceramic fiber insulation layer, a glass wool insulation layer, or a fiber calcium silicate insulation layer.

[0016] In some embodiments, a check valve is disposed in the nitrogen inlet, the nitrogen outlet and the heat source inlet.

[0017] In some embodiments, the heat source inlet pipe includes an access section, an introduction section, and an accident section;

[0018] The inlet of the access section is used to be connected to the discharge port, the outlet of the access section is connected to the inlet of the introduction section, the outlet of the introduction section is connected to the inlet of the heat source, the accident section is arranged in parallel with the introduction section and the inlet is connected to the outlet of the access section;

[0019] A first stop valve is arranged on the introduction section, and a first opening and closing valve is arranged on the accident section.

[0020] In some embodiments, the nitrogen inlet pipe includes a distribution section, an input transfer section, and a bypass section;

[0021] The inlet of the distribution section is used to be connected to the outlet of the nitrogen storage device, the outlet of the distribution section is connected to the inlet of the input transfer section, the outlet of the input transfer section is connected to the nitrogen inlet, the bypass section is arranged in parallel with the input transfer section, and the bypass section is connected to the distribution section and the nitrogen discharge pipe;

[0022] A second stop valve is arranged on the input transfer section, and a third stop valve is arranged on the bypass section.

[0023] In some embodiments, the nitrogen exhaust pipe includes an outlet section and an output transfer section;

[0024] The inlet of the box outlet section is connected to the nitrogen outlet, the outlet of the box outlet section is connected to the inlet of the output transfer section, the outlet of the output transfer section is used to be connected to the air inlet, the bypass section is arranged in parallel with the box outlet section, and the bypass section is connected to the distribution section and the output transfer section;

[0025] A fourth stop valve is arranged on the outlet section.

[0026] The above one or more technical schemes in the 0Be nitrogen heating device at the front end of the tin bath provided by the present invention have at least one of the following technical effects: when in use, the high-temperature exhaust gas discharged from the discharge port of the tin bath is introduced into the heating chamber of the heating box through the heat source inlet pipe, a heating pipe is arranged in the heating chamber, the nitrogen inlet pipe is connected to the heating pipe and the nitrogen is input into the heating pipe, the nitrogen entering the heating pipe exchanges heat with the high-temperature exhaust gas whose temperature is much higher than that of the nitrogen in the heating chamber, so that the nitrogen absorbs the residual heat of the high-temperature exhaust gas and is heated, and the heated nitrogen is then output to the air inlet hole of the 0Be sealing cover through the nitrogen exhaust pipe, which is used to form a nitrogen curtain between the front end of the tin bath and the flow channel to separate the atmosphere of the tin bath and the flow channel. In this way, since the temperature of the nitrogen introduced at the 0 Bei sealing cover is greatly increased, the high-temperature nitrogen gas flow first reaches the junction of the eight-shaped bricks-backing bricks-flow channel bricks on both sides of the front end of the tin bath after being discharged, that is, it reaches the low-temperature area at the front end of the tin bath (that is, the area where the temperature is reduced to the crystallization temperature due to the obstruction of the flow of glass water), and transfers heat to the eight-shaped bricks, backing bricks and flow channel bricks, so that the temperature of the eight-shaped bricks-backing bricks-flow channel bricks and their junctions is raised to higher than the crystallization temperature, effectively reducing the amount of crystallization, improving the production quality of glass, and reducing production costs. In addition, the high-temperature exhaust gas discharged during the operation of the tin bath is cleverly used as the heating source of the nitrogen of the 0 Bei sealing cover, which can not only effectively heat the nitrogen, but also reasonably utilize the waste heat of the high-temperature exhaust gas generated during the production of float glass, which is environmentally friendly and practical.

[0027] Another technical solution adopted by the present invention is: a 0.4K sealing device, including a 0.4K sealing cover, a nitrogen storage device and the above-mentioned 0.4K nitrogen heating device at the front end of the tin bath, the 0.4K sealing cover is provided with an air inlet, the inlet of the nitrogen inlet pipe is connected to the nitrogen outlet of the nitrogen storage device, and the outlet of the nitrogen exhaust pipe is connected to the air inlet.

[0028] The 0-beam sealing device provided by the present invention uses the above-mentioned 0-beam nitrogen heating device at the front end of the tin bath to heat the nitrogen before it enters the 0-beam sealing cover, so that the nitrogen temperature is increased and then discharged from the air inlet of the 0-beam sealing groove to the front end of the tin bath. After being discharged, the high-temperature nitrogen gas flow first reaches the junction of the eight-shaped brick-backing brick-flow channel brick on both sides of the front end of the tin bath, and transfers heat to the eight-shaped brick, backing brick and flow channel brick, so that the temperature of the eight-shaped brick-backing brick-flow channel brick and their junction is increased to higher than the crystallization temperature. In this way, the 0-beam sealing cover of the present invention can not only effectively isolate the flow channel and the tin bath atmosphere, but also increase the temperature of the low-temperature area at the front end of the tin bath, effectively reduce the amount of crystallization during glass production, improve the production quality and efficiency of glass, and reduce the cost of glass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 It is a structural schematic diagram of the front end of the tin bath in the related art;

[0031] Figure 2 It is a schematic diagram of the planar structure of the connection between the flow channel and the tin bath in the related art;

[0032] Figure 3 A schematic diagram of the structure of a nitrogen heating device at the front end of a tin bath provided in one embodiment of the present invention;

[0033] Figure 4 A schematic structural diagram of a nitrogen heating device at the front end of a tin bath provided in another embodiment of the present invention.

[0034] Among them, the reference numerals in the figure are:

[0035] 10. Heating box; 101. First side wall; 102. Second side wall; 103. Insulation layer; 11. Heating chamber; 12. Nitrogen inlet; 13. Nitrogen outlet; 14. Heat source inlet; 15. Emission outlet; 16. Heating pipe; 161. Heating pipe section; 20. Nitrogen inlet pipe; 21. Distribution section; 211. Second opening and closing valve; 22. Input transfer section; 221. Second stop valve; 23. Bypass section; 231. Third stop valve; 30. Nitrogen exhaust Pipe; 31, outlet section; 311, fourth stop valve; 32, output transfer section; 40, heat source inlet pipe; 41, access section; 42, introduction section; 421, first stop valve; 43, accident section; 431, first opening and closing valve; 50, vent pipe; 51, valve; 100, flow channel; 200, tin bath; 201, vent; 300, 0 Bei sealing cover; 301, eight-shaped brick; 302, backing brick; 303, flow channel brick; 304, air inlet. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figures 1 to 4 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] References to "one embodiment", "some embodiments" or "an embodiment" described in the present specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present invention. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc., appearing at different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, particular features, structures or characteristics may be combined in any suitable manner.

[0041] In related technologies, such as Figure 1 and Figure 2As shown, the float glass production line adopts the method of increasing the temperature of the glass water in the flow channel, thereby indirectly heating the glass water at the junction of the eight-shaped brick 301-backing brick 302-flow channel brick 303 at the front end of the tin bath 200, so that the temperature of the retained glass water does not drop to the crystallization temperature, thereby reducing the amount of precipitated wollastonite crystals. Although this method can reduce the amount of crystal precipitation to a certain extent, due to the limitation of the structure of the tin bath 200, the temperature of the glass water at the front end of the tin bath 200 cannot be greatly increased (generally only about 20°C at most). On the one hand, the temperature increase of the glass water is limited, and the temperature of the area prone to crystallization cannot be continuously maintained above the crystallization temperature, and the crystallization problem cannot be fundamentally solved; on the other hand, if the temperature of the glass water at the front end of the tin bath 200 is too high, it will cause the cooling water in the tin bath 200 to be insufficiently cooled, affecting the cooling and forming effect of the glass ribbon. In severe cases, it may even cause the temperature at the outlet of the tin bath 200 to be out of control, and the glass will be scratched, crushed, or have more serious quality defects such as tin ash, resulting in greater quality losses. In addition, electric heating is often used to heat windshield washer fluid. The high-power electric heating equipment itself also has many problems, such as large investment, difficulty in operation, high maintenance cost, high operating energy consumption, and high safety risks.

[0042] Based on this, the inventors of the present application focused on how to effectively reduce the amount of crystallization at the front end of the tin bath 200 and reduce the impact of crystallization on the glass quality without affecting the cooling effect of the cooling water bag in the tin bath 200 on the glass ribbon. They also conducted in-depth research on the narrow flow channel 100 float glass production line and provided a 0 Bei nitrogen heating device at the front end of the tin bath 200. The device heats the 0 Bei nitrogen at the front end of the tin bath 200 to increase the temperature of the crystallization area at the front end of the tin bath 200, thereby making the temperature of the area continuously higher than the crystallization temperature, effectively solving the crystallization problem at the front end of the tin bath 200.

[0043] like Figure 3 and Figure 4 As shown in the figure, the dotted arrows in the figure indicate the flow direction of the gas. The following is a detailed description of the 0-barrel nitrogen heating device for the front end of the tin bath provided by the present invention in conjunction with specific embodiments.

[0044] The present embodiment provides a nitrogen heating device for the front end of the tin bath, which includes a heating box 10, a nitrogen inlet pipe 20, a nitrogen exhaust pipe 30 and a heat source inlet pipe 40. The heating box 10 has a heating chamber 11, and the heating box 10 also has a nitrogen inlet 12, a nitrogen outlet 13 and a heat source inlet 14 connected to the heating chamber 11. A heating pipe 16 connected to the nitrogen inlet 12 and the nitrogen outlet 13 is provided in the heating chamber 11; the outlet of the nitrogen inlet pipe 20 is connected to the nitrogen inlet 12, and the inlet of the nitrogen inlet pipe 20 is used to be connected to the nitrogen outlet 13 of an external nitrogen storage device (not shown in the figure), and the nitrogen inlet pipe 20 is used to input nitrogen into the heating pipe 16; the heat source inlet The outlet of the pipe 40 is connected to the heat source inlet 14, and the inlet of the heat source inlet pipe 40 is used to connect to the discharge port 201 of the tin bath 200. The heat source inlet pipe 40 is used to introduce the high-temperature discharge gas discharged from the discharge port 201 of the tin bath 200 into the heating chamber 11. Since the temperature of the discharge gas is much higher than the temperature of the nitrogen, the discharge gas contacts the heating tube 16 in the heating chamber 11, and conducts heat to the heating tube 16, thereby heating the low-temperature nitrogen in the tube 16, and greatly increasing the temperature of the nitrogen. The nitrogen outlet 13 of the heating box 10 is connected to the inlet of the nitrogen exhaust pipe 30, and the outlet of the nitrogen exhaust pipe 30 is connected to the air inlet 304 of the 0 Bei sealing cover 300. The heated nitrogen is discharged to the front end of the tin bath 200 through the nitrogen exhaust pipe 30 and the air inlet 304 of the 0 Bei sealing cover 300, thereby forming a high-temperature nitrogen curtain between the front end of the tin bath 200 and the flow channel 100, separating the atmosphere of the tin bath 200 and the flow channel 100.

[0045] Furthermore, if Figure 3 As shown, the heating box 10 is also provided with a venting outlet 15, which is in communication with the heating chamber 11. The venting gas entering the heating chamber 11 exchanges heat with the nitrogen and then is discharged through the venting outlet 15, so that the air pressure in the heating box 10 is kept balanced, thereby ensuring that the high-temperature venting gas can continue to enter the heating chamber 11 through the heat source inlet 14. In some specific embodiments, the venting outlet 15 can be connected to a venting pipe 50 to guide the low-temperature venting gas to a fixed position for discharge, and a valve 51 can also be provided on the venting pipe 50 to open and close the venting pipe 50, for example, the valve 51 can be a rotary valve or a gate valve.

[0046] Thus, the 0.4-meter nitrogen heating device at the front end of the tin bath provided by the embodiment of the present invention, when in use, introduces the high-temperature exhaust gas discharged from the discharge port 201 of the tin bath 200 into the heating chamber 11 of the heating box 10 through the heat source inlet pipe 40, and a heating pipe 16 is arranged in the heating chamber 11. The nitrogen inlet pipe 20 is connected to the heating pipe 16 and inputs the nitrogen into the heating pipe 16. The nitrogen entering the heating pipe 16 exchanges heat with the high-temperature exhaust gas whose temperature is much higher than that of the nitrogen in the heating chamber 11. In this way, the nitrogen absorbs the residual heat of the high-temperature exhaust gas and is heated. The heated nitrogen is then output to the air inlet 304 of the 0.4-meter sealing cover 300 through the nitrogen exhaust pipe 30, and is used to form a nitrogen curtain between the front end of the tin bath 200 and the flow channel 100 to separate the atmosphere of the tin bath 200 and the flow channel 100.

[0047] In this way, since the temperature of the nitrogen introduced into the 0 Bei sealing cover 300 is greatly increased, the high-temperature nitrogen gas flow first reaches the junction of the eight-shaped brick 301-backing brick 302-flow channel brick 303 on both sides of the front end of the tin bath 200 after being discharged, that is, it reaches the low-temperature area at the front end of the tin bath 200 (that is, the area where the temperature is reduced to the crystallization temperature due to the obstruction of the flow of glass water), and transfers heat to the eight-shaped brick 301, the backing brick 302 and the flow channel brick 303, so that the temperature of the eight-shaped brick 301-backing brick 302-flow channel brick 303 and their junction is raised to higher than the crystallization temperature, effectively reducing the crystallization amount, improving the production quality of glass, and reducing production costs. In addition, the high-temperature exhaust gas discharged during the operation of the tin bath 200 is cleverly used as the heating source of the nitrogen of the 0 Bei sealing cover 300, which can not only effectively heat the nitrogen, but also reasonably utilize the waste heat of the high-temperature exhaust gas generated during the production of float glass, which is environmentally friendly and practical.

[0048] It should be noted that, for a narrow flow channel float glass production line, a sealing cover 300 is usually provided at the front end of the tin bath 200, such as Figure 1 and Figure 2 As shown, the 0 Bei sealing cover 300 is used to seal the space between the front end of the tin bath 200 and the flow channel 100. Nitrogen is introduced into the air inlet holes 304 on both sides of the 0 Bei sealing cover 300 to form a nitrogen curtain between the tin bath 200 and the flow channel 100 to separate the atmosphere of the front end of the tin bath 200 and the flow channel 100, and to prevent the airflow in the flow channel 100 from entering the tin bath 200 and contaminating the nitrogen / hydrogen mixed protective gas in the tin bath 200. In the related art, pure nitrogen such as pure nitrogen flow at room temperature is introduced into the 0 Bei sealing cover 300, and its flow rate is controlled at 40Nm 3 / h~100Nm 3 / h, the nitrogen flow only serves to separate the atmosphere.

[0049] In addition, for the internal environment of the tin bath 200, it is necessary to maintain the internal nitrogen / hydrogen mixed protective gas clean and not contaminated. Therefore, a vent 201 is usually set at the side seal positions on both sides of the front end of the tin bath 200 to continuously vent and replace the nitrogen / hydrogen mixed gas in the tin bath 200 to keep the nitrogen / hydrogen mixed gas in the tin bath 200 from being contaminated. In this way, the nitrogen / hydrogen mixed gas in the tin bath 200 absorbs the temperature of the glass water, and its temperature when discharged from the vent 201 (that is, the above-mentioned vented gas) can be as high as 600°C. Using it as a heating source for the nitrogen of the 0 Bei sealing cover 300 can not only effectively heat the nitrogen, but also the temperature of the nitrogen can be increased to 300°C after absorbing heat in the insulation chamber. In this way, the waste heat of the high-temperature exhaust gas generated during the production of float glass is reasonably used to heat the nitrogen of the 0 Bei sealing cover 300, which is environmentally friendly and practical.

[0050] In another embodiment of the present invention, Figure 3 and Figure 4 As shown, the above-mentioned heating tube 16 includes a plurality of heating tube segments 161 connected in sequence, and the plurality of heating tube segments 161 are spirally arranged in the heating chamber 11. In this way, by spirally arranging the plurality of heating tube segments 161, the space of the heating chamber 11 can be fully utilized, and the heating tube 16 with a longer distance can be arranged as much as possible, thereby increasing the heat exchange area between the nitrogen in the heating chamber 11 and the high-temperature released gas, so that the nitrogen can absorb more of the temperature of the released gas, thereby more effectively increasing the temperature of the nitrogen.

[0051] In some specific embodiments, the heating tube 16 uses a metal tube, which has good thermal conductivity and can quickly transfer the heat of the emitted gas to the nitrogen in the tube, thereby accelerating the increase in the temperature of the nitrogen. It can be understood that in other embodiments, the heating tube 16 can also use other tubes with good thermal conductivity, and the tube material of the heating tube 16 is not limited here.

[0052] In another embodiment of the present invention, Figure 3 and Figure 4 As shown, the heating box 10 has a first side wall 101 and a second side wall 102 that are oppositely arranged, a heat source inlet 14 is arranged at one end of the first side wall 101, and a dissipation outlet 15 is arranged at an end of the second side wall 102 away from the heat source inlet 14. Specifically, in this embodiment, the heating box 10 is in a cubic shape, the heat source inlet 14 is located on one side of the box body, the dissipation outlet 15 is located on the other side of the box body, and the heat source inlet 14 and the dissipation outlet 15 are staggered at the farthest distance in space.

[0053] In this way, it is prevented that the released gas enters the heating chamber 11 from the heat source inlet 14 and is directly discharged from the release outlet 15, and it is prevented that the released gas is directly discharged without sufficient contact and heat exchange with the heating tube 16, resulting in the inability to quickly and effectively increase the temperature of the nitrogen in the heating tube 16. In addition, by arranging the heat source inlet 14 and the release outlet 15 to be far away from each other in space, the contact and heat exchange time between the released gas and the heating tube 16 can be reasonably extended within the effective space, avoiding the need to set the volume of the heating box 10 too large due to insufficient heat exchange time.

[0054] In this embodiment, if Figure 3 As shown, the nitrogen inlet 12 and the nitrogen outlet 13 can also be respectively arranged on the opposite sides of the heating box 10. In this way, the nitrogen inlet pipe 20 and the nitrogen exhaust pipe 30 are respectively arranged on the opposite sides of the heating box 10, and the pipeline setting and space arrangement are more reasonable.

[0055] Of course, it is understandable that in some other embodiments, due to space limitations, the nitrogen inlet 12 and the nitrogen outlet 13 may be disposed on the same side or adjacent sides of the heating box 10, and the nitrogen inlet pipe 20 and the nitrogen exhaust pipe 30 may be arranged accordingly, which also does not affect the input of low-temperature nitrogen, the heat absorption and temperature rise of nitrogen, and the discharge of high-temperature nitrogen.

[0056] In another embodiment of the present invention, the outer wall of the heating box 10 is coated with a heat-insulating layer 103 to prevent the heat of the dissipated gas from being lost through the wall of the heating box 10, and to prevent the high-temperature outer wall of the heating box 10 from scalding surrounding structures or workers. Similarly, the outer wall of the nitrogen exhaust pipe 30 is also coated with a heat-insulating layer 103, which is used to insulate the nitrogen exhaust pipe 30 to prevent the heat of the high-temperature nitrogen in the nitrogen exhaust pipe 30 from being lost through the pipe wall, resulting in excessive heat loss along the way when the high-temperature nitrogen is transported, resulting in excessive temperature drop, affecting its heating effect on the low-temperature area at the front end of the tin bath 200.

[0057] In some specific embodiments, the above-mentioned insulation layer 103 is an aluminum silicate fiber cotton insulation layer 103, a ceramic fiber insulation layer 103, a glass wool insulation layer 103 or a fiber calcium silicate insulation layer 103, which has good heat insulation effect and high heat resistance. It will not self-ignite under high temperature conditions, has good insulation effect, and is highly safe to use.

[0058] In some specific embodiments, the thickness of the thermal insulation layer 103 is controlled within the range of 80 mm to 120 mm, so as to ensure the thermal insulation effect of the thermal insulation layer 103 while avoiding excessive space occupation and excessive manufacturing cost due to the thermal insulation layer 103 being too thick. Specifically, the thickness of the thermal insulation layer 103 can be specific values ​​such as 80 mm, 90 mm, 100 mm, 105 mm, 110 mm, 115 mm and 120 mm, and can be selected according to the needs when using.

[0059] In another embodiment of the present invention, Figure 3 As shown, the nitrogen inlet 12, the nitrogen outlet 13, the heat source inlet 14 and the venting outlet 15 are all provided with check valves (not shown in the figure). In this way, by providing the check valves, it is ensured that the gas at each inlet and outlet can only flow in one direction, so as to avoid changes in the air flow path and affect the normal use of the heating device of this embodiment. Specifically, the check valve in the nitrogen inlet 12 is used to limit the nitrogen to only enter the heating pipe 16 from the nitrogen inlet pipe 20, the check valve in the nitrogen outlet 13 is used to limit the nitrogen to only enter the nitrogen exhaust pipe 30 from the heating pipe 16, the check valve of the heat source inlet 14 is used to limit the venting gas to only heat the chamber 11 from the heat source inlet pipe 40, and the check valve of the venting outlet 15 is used to prevent the gas outside the heating box 10 from entering the heating chamber 11 through the venting outlet 15.

[0060] It should be noted that when the vent outlet 15 is connected to the vent pipe 50 and a valve 51 is provided on the vent pipe 50, the valve 51 can also be directly set as a check valve without the need to set a check valve at the vent outlet 15. It can also play the role of limiting the external airflow entering the heating chamber 11.

[0061] In another embodiment of the present invention, Figure 3 and Figure 4 As shown, the heat source inlet pipe 40 includes an access section 41, an introduction section 42 and an accident section 43. Among them, the inlet of the access section 41 is used to be connected to the discharge port 201, the outlet of the access section 41 is connected to the inlet of the introduction section 42, and the outlet of the introduction section 42 is connected to the heat source inlet 14. The access section 41 is used to introduce the high-temperature discharge gas discharged from the discharge port 201 of the tin bath 200, and discharge it into the heating chamber 11 through the introduction section 42; the accident section 43 is arranged in parallel with the introduction section 42, and the inlet of the accident section 43 is connected to the outlet of the access section 41. The accident section 43 is used to guide the high-temperature discharge gas to be discharged directly through the accident section 43 when the heating box 10 cannot work normally or when there is no need to heat the nitrogen. The outlet of the accident section 43 can be extended to connect with an external cooling device, so as to guide the high-temperature discharge gas to the cooling device for cooling and then discharge.

[0062] In this embodiment, if Figure 3 and Figure 4As shown, a first stop valve 421 is provided on the introduction section 42, and a first opening and closing valve 431 is provided on the accident section 43. When the heating box 10 cannot work normally, or when there is no need to heat the nitrogen, the first opening and closing valve 431 is opened to make the accident section 43 conductive, that is, the released gas can flow out smoothly through the accident section 43, and at the same time, the first stop valve 421 is operated to close the introduction section 42, so that the released gas cannot flow into the heating chamber 11 through the introduction section 42. Among them, the first stop valve 421 can be a plug valve, and the first opening and closing valve 431 can be a rotary valve or a gate valve.

[0063] Specifically, in this embodiment, the first stop valve 421 is a gate valve to ensure that when a large diameter introduction section 42 is selected, the introduction section 42 can be reliably closed to cut off the airflow of the introduction section 42. Of course, in other embodiments, according to the diameter of the introduction section 42 and the pressure of the released gas, other stop valves can also be selected to control the cutoff and conduction of the introduction section 42, and the specific type of the first stop valve 421 is not limited here.

[0064] In another embodiment of the present invention, Figure 3 and Figure 4 As shown, the nitrogen inlet pipe 20 includes a distribution section 21, an input transfer section 22 and a bypass section 23, wherein the inlet of the distribution section 21 is used to be connected to the outlet of the nitrogen storage device, and is used to introduce nitrogen from the nitrogen storage device, the outlet of the distribution section 21 is connected to the inlet of the input transfer section 22, and the outlet of the input transfer section 22 is connected to the nitrogen inlet 12; when the heating box 10 works normally, the nitrogen flowing out of the distribution section 21 flows into the heating pipe 16 through the input transfer section 22. The bypass section 23 is arranged in parallel with the input transfer section 22, and the bypass section 23 connects the distribution section 21 and the nitrogen exhaust pipe 30. In this way, when the heating box 10 cannot work normally or there is no need to heat the nitrogen, the nitrogen can flow directly into the nitrogen exhaust pipe 30 through the bypass section 23, ensuring the formation of a nitrogen curtain in the 0 Bei sealing cover 300, avoiding the normal function of the 0 Bei sealing cover 300 being affected by an accident of the heating box 10, and when the nitrogen does not need to be heated, the normal transportation of nitrogen at room temperature can be guaranteed.

[0065] In this embodiment, if Figure 3 and Figure 4 As shown, a second stop valve 221 is provided on the input transfer section 22, and a third stop valve 231 is provided on the bypass section 23. When the heating box 10 cannot work normally, or when it is not necessary to heat the nitrogen, the third stop valve 231 is operated to make the bypass section 23 conductive, that is, the nitrogen can smoothly flow into the nitrogen exhaust pipe 30 through the bypass section 23, and at the same time, the second stop valve 221 is operated to close the input transfer section 22, so that the nitrogen cannot flow into the heating pipe 16 through the input transfer section 22. Among them, the second stop valve 221 and the third stop valve 231 can both be rotary valves or gate valves.

[0066] In this embodiment, if Figure 3 and Figure 4 As shown, the nitrogen exhaust pipe 30 includes an outlet section 31 and an output transfer section 32. The inlet of the outlet section 31 is connected to the nitrogen outlet 13, the outlet of the outlet section 31 is connected to the inlet of the output transfer section 32, the outlet of the output transfer section 32 is used to be connected to the air inlet 304 of the 0 Bei sealing cover 300, the bypass section 23 is arranged in parallel with the outlet section 31, the bypass section 23 is connected to the distribution section 21 and the output transfer section 32, and the outlet section 31 is provided with a fourth stop valve 311 such as a rotary valve or a gate valve, etc. The fourth stop valve 311 is used to control the cut-off of the outlet section 31 when the heating box 10 works abnormally.

[0067] Thus, in the present embodiment, the nitrogen has a nitrogen heating path of “distribution section 21→input transfer section 22→heating pipe 16→outlet pipe section→output transfer section 32→air inlet 304 of 0 Bei sealing cover 300”, and a normal temperature nitrogen delivery path of “distribution section 21→bypass section 23→output transfer section 32→air inlet 304 of 0 Bei sealing cover 300”. According to the working condition of the heating box 10 and whether the nitrogen needs to be heated, a suitable path is selected to open and another path is closed, and nitrogen of different temperatures can be discharged from the air inlet 304 of the 0 Bei sealing cover 300, so as to meet the selection of different usage conditions, and the use is flexible and convenient, and the practicability is strong.

[0068] Furthermore, in this embodiment, if Figure 3 and Figure 4 As shown, a second on-off valve 211 may be provided on the distribution section 21, and the second on-off valve 211 is used to control the opening and closing of the distribution section 21, thereby controlling the input and interruption of nitrogen. Specifically, it may be a rotary valve or a gate valve. In addition, a metering valve may also be provided on the distribution section 21 to monitor the flow rate of nitrogen, etc.

[0069] Another embodiment of the present invention further provides a 0Be sealing device (not shown), including a 0Be sealing cover 300, a nitrogen storage device and the 0Be nitrogen heating device at the front end of the tin bath of the above-mentioned embodiments, the 0Be sealing cover 300 is provided with an air inlet 304, the inlet of the nitrogen inlet pipe 20 is connected to the nitrogen outlet 13 of the nitrogen storage device, and the outlet of the nitrogen exhaust pipe 30 is connected to the air inlet 304.

[0070] The 0-shell sealing device provided in this embodiment uses the above-mentioned 0-shell nitrogen heating device at the front end of the tin bath to heat the nitrogen before it enters the 0-shell sealing cover 300, so that the nitrogen temperature is increased and then discharged from the air inlet 304 of the 0-shell sealing groove to the front end of the tin bath 200. After being discharged, the high-temperature nitrogen gas flow first reaches the junction of the eight-shaped brick 301-backing brick 302-flow channel brick 303 on both sides of the front end of the tin bath 200, and transfers heat to the eight-shaped brick 301, the backing brick 302 and the flow channel brick 303, so that the temperature of the eight-shaped brick 301-backing brick 302-flow channel brick 303 and their junction is increased to a temperature higher than the crystallization temperature. In this way, the 0-shell sealing cover 300 of the present invention can not only effectively isolate the flow channel 100 and the atmosphere of the tin bath 200, but also increase the temperature of the low-temperature area at the front end of the tin bath 200, effectively reduce the amount of crystallization during glass production, improve the production quality and efficiency of glass, and reduce the cost of glass production.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tin bath front end 0 bei nitrogen heating device, characterized in that, include: A heating box, the heating box having a heating chamber, the heating box also having a nitrogen inlet, a nitrogen outlet and a heat source inlet connected to the heating chamber, and a heating pipe connected to the nitrogen inlet and the nitrogen outlet is provided in the heating chamber; A nitrogen inlet pipe, connected to the nitrogen inlet, for inputting nitrogen into the heating pipe; A nitrogen exhaust pipe connected to the nitrogen outlet and used to discharge the nitrogen in the heating tube to the air inlet of the 0 Bei sealing cover; A heat source inlet pipe is connected to the heat source inlet and is used to introduce the emitted gas discharged from the emission port of the tin bath into the heating chamber; wherein The heating box also has a venting outlet connected to the heating chamber, the venting outlet is used to discharge the venting gas entering the heating chamber, and the venting outlet is used to be connected to a venting pipe to guide the venting gas to a fixed position for discharge.

2. The tin bath front end 0-30 nitrogen heating device according to claim 1, characterized in that: The heating pipe comprises a plurality of heating pipe segments connected in sequence, and the plurality of heating pipe segments are spirally arranged in the heating cavity.

3. The tin bath front end 0-30 nitrogen heating device according to claim 1, characterized in that: The heating box has a first side wall and a second side wall that are arranged opposite to each other. The heat source inlet is arranged at one end of the first side wall, and the dissipation outlet is arranged at one end of the second side wall away from the heat source inlet.

4. The 0.5-barrel nitrogen heating device for the front end of the tin bath according to claim 1, characterized in that: The outer wall surface of the heating box and the outer wall surface of the nitrogen exhaust pipe are both covered with a thermal insulation layer.

5. The 0.5-barrel nitrogen heating device for the front end of the tin bath according to claim 4, characterized in that: The thermal insulation layer is an aluminum silicate fiber wool thermal insulation layer, a ceramic fiber thermal insulation layer, a glass wool thermal insulation layer or a fiber calcium silicate thermal insulation layer.

6. The tin bath front end 0-30 nitrogen heating device according to claim 1, characterized in that: The nitrogen inlet, the nitrogen outlet and the heat source inlet are all provided with check valves.

7. The tin bath front end nitrogen heating device according to any one of claims 1 to 6, characterized in that: The heat source inlet pipe includes an access section, an introduction section and an accident section; The inlet of the access section is used to be connected to the discharge port, the outlet of the access section is connected to the inlet of the introduction section, the outlet of the introduction section is connected to the inlet of the heat source, and the accident section is arranged in parallel with the introduction section and the inlet is connected to the outlet of the access section; The introduction section is provided with a first stop valve, and the accident section is provided with a first opening and closing valve.

8. The tin bath front end nitrogen heating device according to any one of claims 1 to 6, characterized in that: The nitrogen inlet pipe comprises a distribution section, an input transfer section and a bypass section; The inlet of the distribution section is used to be connected to the outlet of the nitrogen storage device, the outlet of the distribution section is connected to the inlet of the input transfer section, the outlet of the input transfer section is connected to the nitrogen inlet, the bypass section is arranged in parallel with the input transfer section, and the bypass section is connected to the distribution section and the nitrogen discharge pipe; The input transfer section is provided with a second stop valve, and the bypass section is provided with a third stop valve.

9. The tin bath front end 0-30 nitrogen heating device according to claim 8, characterized in that: The nitrogen exhaust pipe includes an outlet section and an output transfer section; The inlet of the box outlet section is connected to the nitrogen outlet, the outlet of the box outlet section is connected to the inlet of the output transfer section, the outlet of the output transfer section is used to be connected to the air inlet, the bypass section is arranged in parallel with the box outlet section, and the bypass section connects the distribution section and the output transfer section; The outlet section is provided with a fourth stop valve.

10. A 0-Be sealing device, characterized in that: It comprises a 0.4-meter sealing cover, a nitrogen storage device and a 0.4-meter nitrogen heating device at the front end of the tin bath as claimed in any one of claims 1 to 9, wherein the 0.4-meter sealing cover is provided with an air inlet, the inlet of the nitrogen inlet pipe is connected to the nitrogen outlet of the nitrogen storage device, and the outlet of the nitrogen exhaust pipe is connected to the air inlet.

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