Waste gas flue structure of annealing furnace
By adopting a rectangular cross-sectional structure and fiber block fixing method, the problems of excessive height of the annealing furnace's exhaust gas flue and the easy drop of fiber coating are solved, the stability of the flue structure and efficient waste gas transportation are achieved, and product quality and production safety are ensured.
Patent Information
- Application Number
- CN202422423136.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The exhaust gas flue structure of the existing annealing furnace is too high, and the fiber coating is prone to fall off, which affects the installation and product quality, especially when the height of the factory building is insufficient.
The flue body adopts a rectangular cross-sectional structure, the first gas transport part is connected to the annealing furnace, and the second gas transport part is connected at a preset angle. The inner wall is covered with fiber blocks, and a refractory fiber blanket is arranged in a misaligned manner, and is fixed by fasteners and embedded parts to improve connection stability and heat insulation effect.
It reduces the flue height, reduces the risk of fiber coating shedding, improves waste gas delivery efficiency and product quality, and ensures production safety.
Smart Images
Figure CN223214141U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of annealing furnace waste gas treatment, and in particular to an annealing furnace waste gas flue structure. Background Art
[0002] Annealing is a process involved in thermal processing. Annealing is a metal heat treatment process in which metal is slowly heated to a certain temperature, held for a sufficient time, and then cooled at an appropriate rate. Annealing requires an annealing furnace, which is connected to an exhaust duct to remove the waste gases generated during annealing.
[0003] At present, the exhaust flue is usually designed as a hollow cylindrical structure, and the bulk density, thermal conductivity, strength and other parameters of the fiber coating used in the exhaust flue are determined according to the temperature of the combustion exhaust gas, so as to reduce heat loss in the exhaust gas and provide protection for the exhaust flue.
[0004] However, when the factory building is not high enough, the cylindrical exhaust flue is prone to being too high, affecting the installation and other operations. At the same time, fiber coating is used to achieve thermal insulation. Since the flue coating is often constructed with two layers of fiber coating of different bulk densities, the refractory materials cure at different speeds. When the temperature is increased or decreased, the expansion and contraction coefficients are also different, resulting in large-scale cracking and shedding of the fiber coating refractory materials after the annealing furnace is put into operation. In addition, if there are corners on the inner wall of the exhaust flue, the fiber coating on the side wall of the connection section between the annealing furnace shell and the top exhaust flue is more likely to crack and loosen, resulting in localized burning of the exhaust flue shell and the problem of refractory materials falling into the annealing furnace, affecting product quality.
[0005] In the above-mentioned related technologies, there are defects in that the height of the cylindrical exhaust gas flue is too high and the fiber coating material of the non-cylindrical exhaust gas flue is easy to fall off at the corners. Utility Model Content
[0006] In order to improve the problem that the exhaust gas flue is too high and the fiber coating material is easy to fall off, the present application provides an annealing furnace exhaust gas flue structure.
[0007] The annealing furnace exhaust flue structure provided in this application adopts the following technical solutions:
[0008] An annealing furnace exhaust flue structure, comprising:
[0009] a flue body, the flue body comprising a first gas delivery portion and a second gas delivery portion, wherein a first end of the first gas delivery portion is connected to the annealing furnace, and a second end of the first gas delivery portion is connected to the second gas delivery portion, an extension direction of the second gas delivery portion is arranged at a preset angle to an extension direction of the first gas delivery portion, and a longitudinal cross-section of the second gas delivery portion is rectangular, so that the top of the second gas delivery portion is flat;
[0010] Fiber blocks, wherein a plurality of fiber blocks are provided, and the plurality of fiber blocks are connected to the inner walls of the first gas transmission part and the second gas transmission part, and two adjacent fiber blocks are adhered to each other so that the plurality of fiber blocks cover the first gas transmission part and the second gas transmission part.
[0011] By adopting the above technical solution, the first gas delivery part of the flue body is used to connect with the annealing furnace so that the waste gas in the annealing furnace can be discharged, and the second gas delivery part is connected to the first gas delivery part and is used to deliver the waste gas to a preset position so as to achieve exhaust and facilitate the utilization of the waste gas; the extension direction of the second gas delivery part and the extension direction of the first gas delivery part are set at a preset angle, which can achieve the waste gas transportation while reducing the setting height of the flue body, so that it is suitable for factories with relatively small heights and improves applicability; and the longitudinal section of the second gas delivery part is set to be rectangular, so that the top of the second gas delivery part is flat, compared with The circular cross-section can further reduce the vertical height of the second gas transmission part, and at the same time, reduce the degree of reduction in the flow area of the second gas transmission part, so as to improve the exhaust gas transmission efficiency; since the flue body adopts a rectangular cross-section structure, and there is a corner at the connection between the first gas transmission part and the second gas transmission part, the fiber coating is prone to cracking and falling off, so fiber blocks are used to cover the inner wall of the flue body. On the one hand, heat insulation is achieved by the fiber blocks. On the other hand, the use of fiber blocks can facilitate fixation to the flue body, reducing the risk of falling off after long-term use, thereby effectively protecting the flue body and ensuring product quality.
[0012] Optionally, the first end of the first gas delivery portion is detachably connected to the annealing furnace.
[0013] By adopting the above technical solution, when the exhaust gas flue is damaged by overheating, the entire flue body can be installed on the annealing furnace, shortening the installation cycle, reducing downtime, and helping to improve production efficiency; and the detachable connection method can reduce the difficulty of disassembly and assembly, thereby reducing the labor intensity of the operator.
[0014] Optionally, a first refractory fiber blanket is provided between the first end of the first gas delivery portion and the annealing furnace.
[0015] By adopting the above technical solution, the first refractory fiber blanket is clamped at the connection between the first gas transmission part and the annealing furnace, which can improve the stability of the installation on the one hand, and improve the heat insulation effect of the connection on the other hand, and prevent the exhaust gas heat from leaking out at the connection.
[0016] Optionally, two layers of second refractory fiber blankets are provided at the corner positions of the first gas transmission part and the second gas transmission part, and the joint seams of the two layers of the second refractory fiber blankets are staggered.
[0017] By adopting the above technical solution, the staggered second refractory fiber blanket can prevent the high-temperature exhaust gas from passing through the gap between the two fiber blocks and directly contacting the flue body. The exhaust gas contacting the flue body not only easily causes the fiber blocks to fall off, but in severe cases it can also cause carbonization and deformation of the flue body, affecting the use and production safety.
[0018] Optionally, it further includes a plurality of first U-shaped nails, wherein the first U-shaped nails are used to fix the second refractory fiber blanket to the flue body, and the plurality of first U-shaped nails are arranged at preset intervals.
[0019] By adopting the above technical solution, the second refractory fiber blanket can be reliably fixed, ensuring that the second refractory fiber blanket can effectively protect the flue body.
[0020] Optionally, it also includes a through-rib and an angle iron. The fiber block at the connection between the first gas delivery part and the second gas delivery part is L-shaped. One end of the fiber block is connected to the flue body, and the other end of the fiber block is passed through the through-rib. The angle iron is pressed on the through-rib so that the through-rib passes through the angle iron. The angle iron is connected to the fiber block, and the angle iron is connected to the flue body.
[0021] By adopting the above technical solution, the connection reliability of the fiber block at the first gas transmission part and the second gas transmission part can be improved, and the risk of the fiber block falling off due to the existence of corners can be reduced, thereby ensuring the stable realization of the thermal insulation effect.
[0022] Optionally, a third refractory fiber blanket is provided on the inner wall of the first gas delivery part and / or the second gas delivery part, and the third refractory fiber blanket is sandwiched between the inner wall of the flue body and the fiber block.
[0023] By adopting the above technical solution, the heat insulation effect inside the flue body can be improved and the protection effect on the inner wall of the flue body can be optimized.
[0024] Optionally, a fastener is further included, an embedded part is provided on one side of the fiber block, the side of the fiber block provided with the embedded part is close to the inner wall of the flue body, and the fastener connects the embedded part and the flue body.
[0025] By adopting the above technical solution, the fiber block and the flue body can be conveniently fixed by connecting the fasteners and the embedded parts, and the fixing effect can be improved by the embedded parts with a harder texture.
[0026] Optionally, a fourth refractory fiber blanket is further included, and the fourth refractory fiber blanket is sandwiched between two adjacent fiber blocks.
[0027] By adopting the above technical solution, the possibility of high-temperature exhaust gas passing through the gap between two adjacent fiber blocks can be reduced, thereby improving the heat insulation effect and protecting the flue body from damage by high temperature.
[0028] Optionally, a second U-shaped nail is further included, and the second U-shaped nail is used to connect the fourth refractory fiber blanket and the fiber block.
[0029] By adopting the above technical solution, two adjacent fiber blocks are connected through the fourth refractory fiber blanket, which helps to make multiple fiber blocks into an integral structure, improves the reliability of the connection between the fiber blocks and the flue body, and reduces the possibility of local detachment.
[0030] In summary, this application includes at least one of the following beneficial technical effects:
[0031] 1. The first gas delivery part of the flue body is used to connect with the annealing furnace to discharge the waste gas in the annealing furnace. The second gas delivery part is connected to the first gas delivery part and is used to deliver the waste gas to a preset position to achieve exhaust and facilitate the utilization of the waste gas. The extension direction of the second gas delivery part and the extension direction of the first gas delivery part are set at a preset angle, which can achieve the waste gas transportation while reducing the setting height of the flue body, so that it is suitable for factories with relatively small heights and improves applicability. In addition, the longitudinal section of the second gas delivery part is rectangular, so that the top of the second gas delivery part is flat, compared with the circular cross-section. , can further reduce the vertical height of the second gas transmission part, and at the same time, reduce the degree of reduction in the flow area of the second gas transmission part, so as to improve the exhaust gas transmission efficiency; since the flue body adopts a rectangular cross-section structure, and there is a corner at the connection between the first gas transmission part and the second gas transmission part, the fiber coating is prone to cracking and falling off, so fiber blocks are used to cover the inner wall of the flue body. On the one hand, heat insulation is achieved by the fiber blocks, and on the other hand, the fiber blocks can be easily fixed to the flue body, reducing the risk of falling off after long-term use, thereby effectively protecting the flue body and ensuring product quality;
[0032] 2. The staggered second refractory fiber blanket can prevent high-temperature exhaust gas from passing through the gap between the two fiber blocks and directly contacting the flue body. Exhaust gas contacting the flue body not only easily causes the fiber blocks to fall off, but in severe cases, it can also cause the flue body to deform, affecting use and production safety.
[0033] 3. The fiber block and the flue body can be conveniently fixed by connecting the fasteners and the embedded parts, and the fixing effect can be improved by the embedded parts with a harder texture. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 It is a schematic diagram of the exhaust gas flue structure of the annealing furnace in an embodiment of the present application.
[0035] Figure 2 yes Figure 1 Schematic diagram of the cross section at AA in the middle.
[0036] Figure 3 yes Figure 1 Schematic diagram of the cross section at BB in the middle.
[0037] Description of reference numerals:
[0038] 1. Flue body; 11. First gas transmission part; 12. Second gas transmission part; 2. Fiber block; 3. Second refractory fiber blanket; 4. Second U-shaped nail; 5. Angle iron; 6. Third refractory fiber blanket; 7. Fastener; 8. Embedded parts; 9. Fourth refractory fiber blanket. DETAILED DESCRIPTION
[0039] The following is combined with Figure 1 -Attached Figure 3 The present application is further described in detail. In this embodiment, unless otherwise specified, the terms "connected", "connected" and "fixed" are understood in a broad sense, including fixed connection, detachable connection, connection to form an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through an intermediary, internal connection and interaction between two elements, and can be understood based on the specific circumstances.
[0040] In this application, unless otherwise expressly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Moreover, in the description of this embodiment, the terms "above", "below", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise specified, orientation words such as "inside" and "outside" used in this application refer to the outlines of the corresponding components themselves.
[0041] like Figure 1 、 Figure 2 and Figure 3 As shown, the embodiment of the present application discloses an annealing furnace exhaust gas flue structure (hereinafter referred to as "flue structure"). The flue structure includes a flue body 1 and a fiber block 2, which is used to discharge and transport the high-temperature exhaust gas generated by the annealing furnace.
[0042] The flue body 1 includes a first gas delivery section 11 and a second gas delivery section 12, both of which are hollow, cylindrical structures. The first end of the first gas delivery section 11 is connected to the annealing furnace to discharge exhaust gases from the annealing furnace. The second end of the first gas delivery section 11 is connected to the second gas delivery section 12, which is used to transport the exhaust gases to a predetermined location for exhaust and utilization. The second gas delivery section 12 extends at a predetermined angle to the first gas delivery section 11. This allows for exhaust gas transportation while reducing the height of the flue body 1, making it suitable for use in relatively small factories and improving its applicability. Preferably, the predetermined angle can be 90°. The second gas delivery section 12 has a rectangular longitudinal cross-section, resulting in a flat top. Compared to a circular cross-section, this further reduces the vertical height of the second gas delivery section 12, while also minimizing the reduction in the flow area of the second gas delivery section 12 and improving the efficiency of exhaust gas transportation.
[0043] like Figure 1 、 Figure 2 and Figure 3 As shown, since the flue body 1 adopts a rectangular cross-sectional structure and there is a corner at the connection between the first gas transmission part 11 and the second gas transmission part 12, the fiber coating is prone to cracking and falling off, so fiber blocks 2 are used to achieve heat insulation. There are multiple fiber blocks 2, and multiple fiber blocks 2 are connected to the inner walls of the first gas transmission part 11 and the second gas transmission part 12. The two adjacent fiber blocks 2 fit together so that the multiple fiber blocks 2 can cover the first gas transmission part 11 and the second gas transmission part 12. On the one hand, heat insulation is achieved by the fiber blocks 2. On the other hand, the use of the fiber blocks 2 can facilitate fixation to the flue body 1, reducing the risk of falling off after long-term use, thereby effectively protecting the flue body 1 and ensuring product quality.
[0044] The fiber block 2 can be a HOT microcrystalline module. By spraying a curing agent on the surface of the ceramic fiber cotton, a block-shaped fiber block 2 is formed. While facilitating fixation, it can prevent high-temperature exhaust gas from blowing the fiber cotton away and affecting the thermal insulation effect. Compared with fiber coatings, the HOT microcrystalline module has better thermal insulation and temperature resistance, and can be easily and quickly installed. It has a high adhesion to the flue body 1, is not easy to fall off, and has a long service life. The size and shape of the fiber blocks 2 at different positions in the flue body 1 can be set as needed to achieve a full coverage of the inner wall of the flue body 1.
[0045] Such as Figure 1 、 Figure 2 and Figure 3As shown, optionally, the flue structure further includes a fastener 7, and an embedded part 8 is provided on one side of the fiber block 2. The side of the fiber block 2 provided with the embedded part 8 is close to the inner wall of the flue body 1, and the fastener 7 connects the embedded part 8 and the flue body 1. Providing the embedded part 8 on the side close to the flue body 1 can reduce the risk of the embedded part 8 burning due to high temperature and affecting the fixation of the fiber block 2. Through the connection between the fastener 7 and the embedded part 8, the fiber block 2 and the flue body 1 can be fixed conveniently, and the fixing effect can be improved by the embedded part 8 with a harder texture. The fastener 7 can be a bolt, and the embedded part 8 can be a metal plate and a nut fixed thereon, and the fixation is achieved by screwing the bolt and the nut.
[0046] Optionally, the first end of the first gas delivery part 11 is detachably connected to the annealing furnace. This allows the installation of the fiber block 2 to be achieved under the production line, so that the flue body 1 with the fiber block 2 installed can be directly installed on the annealing furnace. When the exhaust flue is damaged by overheating, the flue body 1 with the fiber block 2 connected can be installed as a whole on the annealing furnace during the downtime for maintenance, shortening the installation cycle, reducing downtime, and helping to improve production efficiency. In addition, the detachable connection method can reduce the difficulty of disassembly and assembly, thereby reducing the labor intensity of the operator. The installation of the flue structure can be achieved by mechanical hoisting installation. It can be understood that the detachable connection method between the flue body 1 and the annealing furnace includes but is not limited to plug-in and snap-in, as long as the installation connection can be achieved.
[0047] like Figure 1 、 Figure 2 and Figure 3 As shown, a first refractory fiber blanket is optionally provided between the first end of the first gas delivery section 11 and the annealing furnace. The first refractory fiber blanket is sandwiched between the first gas delivery section 11 and the annealing furnace to improve installation stability and enhance thermal insulation at the connection, thereby preventing heat from escaping from the exhaust gas at the connection.
[0048] like Figure 1 、 Figure 2 and Figure 3 As shown, optionally, two layers of second refractory fiber blankets 3 are provided at the corner positions of the first gas transmission part 11 and the second gas transmission part 12, and the splicing seams of the two layers of second refractory fiber blankets 3 are staggered. The two layers of second refractory fiber blankets 3 that are staggered can prevent the high-temperature exhaust gas from passing through the gap between the two fiber blocks 2 and directly contacting the flue body 1. The exhaust gas contacting the flue body 1 not only easily causes the fiber blocks 2 to fall off, but in severe cases, it can also cause carbonization and deformation of the flue body 1, affecting the safety of use and production. The corner position includes but is not limited to the connection position between the first gas transmission part 11 and the second gas transmission part 12, the corner position of the first gas transmission part 11 and the corner position of the second gas transmission part 12.
[0049] Optionally, the flue structure further includes a plurality of first U-shaped nails, which are used to fix the second refractory fiber blanket 3 to the flue body 1, so as to achieve reliable fixation of the second refractory fiber blanket 3. The plurality of first U-shaped nails are arranged at predetermined intervals to ensure that the second refractory fiber blanket 3 can effectively protect the flue body 1.
[0050] like Figure 1 、 Figure 2 and Figure 3 As shown, optionally, the flue structure further includes a through-rib and an angle iron 5, and the fiber block 2 provided at the connection between the first gas delivery part 11 and the second gas delivery part 12 is L-shaped. The L-shaped fiber block 2 improves the connection reliability of the fiber block 2 at the first gas delivery part 11 and the second gas delivery part 12, and reduces the risk of the fiber block 2 falling off due to the existence of a corner, thereby ensuring the stable realization of the thermal insulation effect. One end of the fiber block 2 is connected to the flue body 1 through the embedded part 8 and the fastener 7; the other end of the fiber block 2 is passed through the through-rib, and the angle iron 5 is pressed onto the through-rib so that the through-rib passes through the angle iron 5. The angle iron 5 is used to connect the fiber block and the flue body 1, so that the fiber block 2 can be reliably connected to the flue body 1. The angle iron 5 is fixedly connected by bolts and nuts.
[0051] like Figure 1 、 Figure 2 and Figure 3 As shown, optionally, a third refractory fiber blanket 6 is provided on the inner wall of the first gas transmission part 11 and / or the second gas transmission part 12, and the third refractory fiber blanket 6 is sandwiched between the inner wall of the flue body 1 and the fiber block 2 to improve the heat insulation effect inside the flue body 1 and optimize the protection effect of the inner wall of the flue body 1.
[0052] Optionally, the flue structure further includes a fourth refractory fiber blanket 9, which is sandwiched between two adjacent fiber blocks 2. This allows the two adjacent fiber blocks 2 to be bonded together with the fourth refractory fiber blanket 9 sandwiched therebetween, thereby reducing the possibility of high-temperature exhaust gas passing through the gap between the two adjacent fiber blocks 2, thereby improving the thermal insulation effect and protecting the flue body 1 from damage by high temperatures. In this embodiment, the first refractory fiber blanket, the second refractory fiber blanket 3, the third refractory fiber blanket 6, and the fourth refractory fiber blanket 9 can be selected from suitable models in the prior art as needed.
[0053] like Figure 1 、 Figure 2 and Figure 3 As shown, the flue structure may further include a second U-shaped nail 4, which is used to connect the fourth refractory fiber blanket 9 and the fiber block 2. Connecting two adjacent fiber blocks 2 through the fourth refractory fiber blanket 9 helps to form a single structure of the multiple fiber blocks 2, improves the reliability of the connection between the fiber blocks 2 and the flue body 1, and reduces the possibility of local detachment.
[0054] It can be understood that the flue structure also includes necessary structures for connection, support, driving, limiting, sealing and control functions so that the flue structure can operate normally; the parameters such as the shape, size, material and setting quantity of each part of the flue structure can be determined according to needs as long as the corresponding functions can be achieved.
[0055] The implementation principle of the exhaust gas flue structure of an annealing furnace in the embodiment of the present application is as follows: the first gas delivery part 11 of the flue body 1 is connected to the annealing furnace to discharge the exhaust gas in the annealing furnace, and the second gas delivery part 12 is connected to the first gas delivery part 11 to deliver the exhaust gas to a preset position to achieve exhaust and facilitate the utilization of the exhaust gas; the extension direction of the second gas delivery part 12 and the extension direction of the first gas delivery part 11 are set at a preset angle, while achieving the exhaust gas delivery, the setting height of the flue body 1 is reduced, so that it is suitable for a factory building with a relatively small height; the longitudinal section of the second gas delivery part 12 is set to be rectangular, so that the top of the second gas delivery part 12 is flat, compared with the circular shaped cross-section, which can further reduce the vertical height of the second gas delivery part 12, and at the same time, reduce the degree of reduction in the flow area of the second gas delivery part 12, thereby improving the exhaust gas transportation efficiency; since the flue body 1 adopts a rectangular cross-section structure, and there is a corner at the connection between the first gas delivery part 11 and the second gas delivery part 12, the fiber coating is prone to cracking and falling off, and therefore the fiber block 2 is used to cover the inner wall of the flue body 1. On the one hand, heat insulation is achieved by the fiber block 2, and on the other hand, the fiber block 2 can be easily fixed to the flue body 1, reducing the risk of falling off after long-term use, thereby effectively protecting the flue body 1 and ensuring product quality.
[0056] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. An annealing furnace exhaust flue structure, characterized in that: include: A flue body (1), the flue body (1) comprising a first gas delivery portion (11) and a second gas delivery portion (12), the first end of the first gas delivery portion (11) being connected to an annealing furnace, the second end of the first gas delivery portion (11) being connected to the second gas delivery portion (12), the extension direction of the second gas delivery portion (12) being arranged at a preset angle to the extension direction of the first gas delivery portion (11), the longitudinal section of the second gas delivery portion (12) being rectangular, and the top of the second gas delivery portion (12) being a plane; A fiber block (2), wherein a plurality of the fiber blocks (2) are provided, wherein the plurality of the fiber blocks (2) are connected to the inner walls of the first gas delivery portion (11) and the second gas delivery portion (12), and adjacent two fiber blocks (2) are adhered to each other so that the plurality of the fiber blocks (2) cover the first gas delivery portion (11) and the second gas delivery portion (12).
2. The exhaust gas flue structure of the annealing furnace according to claim 1, characterized in that: The first end of the first gas delivery portion (11) is detachably connected to the annealing furnace.
3. The exhaust gas flue structure of the annealing furnace according to claim 1, characterized in that: A first refractory fiber blanket is provided between the first end of the first gas delivery portion (11) and the annealing furnace.
4. The exhaust gas flue structure of the annealing furnace according to claim 1, characterized in that: Two layers of second refractory fiber blankets (3) are provided at the corner positions of the first gas delivery portion (11) and the second gas delivery portion (12), and the joint seams of the two layers of the second refractory fiber blankets (3) are staggered.
5. The exhaust gas flue structure of the annealing furnace according to claim 4, characterized in that: It also includes a plurality of first U-shaped nails, wherein the first U-shaped nails are used to fix the second refractory fiber blanket (3) to the flue body (1), and the plurality of first U-shaped nails are arranged at predetermined intervals.
6. The exhaust gas flue structure of the annealing furnace according to claim 4, characterized in that: The invention also includes a through-rib and an angle iron (5); the fiber block (2) at the connection between the first gas delivery part (11) and the second gas delivery part (12) is L-shaped; one end of the fiber block (2) is connected to the flue body (1); the other end of the fiber block (2) is passed through the through-rib; the angle iron (5) is pressed onto the through-rib so that the through-rib passes through the angle iron (5); the angle iron (5) is connected to the fiber block (2), and the angle iron (5) is connected to the flue body (1).
7. The exhaust gas flue structure of the annealing furnace according to claim 1, characterized in that: A third refractory fiber blanket (6) is provided on the inner wall of the first gas delivery part (11) and / or the second gas delivery part (12), and the third refractory fiber blanket (6) is sandwiched between the inner wall of the flue body (1) and the fiber block (2).
8. The exhaust gas flue structure of the annealing furnace according to claim 1, characterized in that: It also includes a fastener (7), an embedded part (8) is provided on one side of the fiber block (2), the side of the fiber block (2) provided with the embedded part (8) is close to the inner wall of the flue body (1), and the fastener (7) connects the embedded part (8) and the flue body (1).
9. The exhaust gas flue structure of the annealing furnace according to claim 1, characterized in that: It also includes a fourth refractory fiber blanket (9), which is sandwiched between two adjacent fiber blocks (2).
10. The exhaust gas flue structure of the annealing furnace according to claim 9, characterized in that: It also includes a second U-shaped nail (4), which is used to connect the fourth refractory fiber blanket (9) and the fiber block (2).