Blast furnace tuyere with double-sealing structure function and blast furnace

Abstract

The utility model provides a blast furnace tuyere with a double-sealing structure function and a blast furnace. The blast furnace tuyere comprises a first air guide piece and a second air guide piece, the second air guide piece comprises a first flexible sealing piece, and the first flexible sealing piece is embedded between the inner wall of the first barrel and the outer wall of the second barrel in an interference mode; the third air guide piece comprises a second flexible sealing piece, and the second flexible sealing piece is embedded between the inner wall of the second barrel and the outer wall of the third barrel in an interference mode. The connecting gap of the tuyere is subjected to interference filling through the first flexible sealing piece and the second flexible sealing piece, even if the air guide piece deforms at a high temperature, the high sealing effect is achieved, and therefore the problem of blast furnace gas leakage is avoided. In addition, the replacement frequency of the elements can be greatly reduced, manpower and material resources are saved, and the operation efficiency is indirectly improved. Compared with a conventional blast furnace structure at the present stage, the blast furnace structure has the remarkable advantages of being simple in structure, low in cost, good in sealing effect, wide in application range, capable of reducing overhaul and replacement frequency and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnaces, in particular to a blast furnace tuyere and a blast furnace with a double sealing structure function. Background Art

[0002] In blast furnace production, the tuyere is a key component, responsible for supplying hot air into the furnace to support combustion and reduction reactions. To ensure stability and safety, tuyeres are typically equipped with large, medium, and small sleeves. These sleeves are designed to gradually decrease in size to accommodate different tuyere installation requirements.

[0003] During installation, the middle and small tuyere sleeves are connected and secured to the large sleeve through integral hoisting and other methods to ensure airtightness and safety. However, in actual production operations, the gaps between the middle and large tuyere sleeves, and between the small and middle tuyere sleeves, are subject to high temperatures and high pressures, as well as excessive alkali metal content and fluctuating furnace temperatures. This can cause the middle tuyere sleeve to warp upward, while the small tuyere sleeve may shrink, deform, or suffer blowout damage. These issues can widen the gaps between the tuyere sleeves, leading to blast furnace gas leaks and seriously impacting safe blast furnace operation.

[0004] To address these issues, the blast furnace is forced to shut down for tuyere sleeve replacement. This replacement process is not only time-consuming and labor-intensive, but also severely disrupts normal blast furnace production. Therefore, a solution is urgently needed to improve the high-temperature and high-pressure resistance of the tuyere sleeve, reduce gas leakage caused by increased gaps, and thus ensure safe blast furnace production. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that gaps are easily generated in the tuyere in the prior art, and to provide a blast furnace tuyere and a blast furnace with a double sealing structure function.

[0006] In order to solve the above technical problems, the utility model provides a blast furnace tuyere with a double sealing structure function, which includes: a first air guide, the first air guide is connected to the air supply end of the air supply device, and includes a first cylinder; a second air guide, the second air guide includes a second cylinder, a first rigid seal and a first flexible seal, the second cylinder has a smaller diameter than the first cylinder, and is connected to the first cylinder, the first rigid seal is arranged at the junction of the second cylinder and the first cylinder, and is provided with a first connecting groove, the first flexible seal is arranged inside the first connecting groove, and is interference-embedded between the inner wall of the first cylinder and the outer wall of the second cylinder, the first rigid seal and the furnace gas The contact area between the second cylinder and the gas in the furnace is greater than the contact area between the second cylinder and the gas in the furnace; the third air guide member, the third air guide member includes a third cylinder, a second rigid seal and a second flexible seal. The diameter of the third cylinder is smaller than that of the second cylinder, and it is connected to the second cylinder, and the air guide channel passes through the first cylinder, the second cylinder and the third cylinder. The second rigid seal is arranged at the junction of the third cylinder and the second cylinder, and a second connecting groove is provided on it. The second flexible seal is arranged inside the second connecting groove and is interference-embedded between the inner wall of the second cylinder and the outer wall of the third cylinder. The contact area between the second rigid seal and the gas in the furnace is greater than the contact area between the third cylinder and the gas in the furnace.

[0007] In one embodiment of the present invention, the first air guide member further includes a limiting portion, which is connected to the outer wall of the first cylinder and is arranged close to the furnace body to limit the first cylinder in the gas flow direction.

[0008] In one embodiment of the present invention, a connecting portion is provided at one end of the first cylinder close to the furnace body. In the gas flow direction, the connecting portion is inclined outward from the first cylinder toward the furnace body.

[0009] In one embodiment of the present invention, a serpentine cooling water pipe is provided on the side wall of the first cylinder.

[0010] In one embodiment of the present invention, the first connecting groove is recessed inward from the outer wall of the first rigid seal, and the recessed depth of the first connecting groove is less than the thickness of the first flexible seal, so that the first flexible seal and the first cylinder have an interference fit.

[0011] In one embodiment of the present invention, the second connecting groove is recessed inward from the outer wall of the second rigid seal, and the recessed depth of the second connecting groove is less than the thickness of the second flexible seal, so that the second flexible seal and the second cylinder have an interference fit.

[0012] In one embodiment of the present invention, a first cooling bin is provided between the inner wall and the outer wall of the second cylinder, and a second cooling bin is provided between the inner wall and the outer wall of the third cylinder. Reinforcements are provided in both the first cooling bin and the second cooling bin, and both ends of the reinforcements abut against the inner wall and the outer wall of the second cylinder and the inner wall and the outer wall of the third cylinder respectively.

[0013] In one embodiment of the present invention, the side walls of the first cylinder, the second cylinder and the third cylinder are all inclined so that the gas flow inside the first cylinder, the second cylinder and the third cylinder changes evenly.

[0014] In one embodiment of the present invention, the base materials of the first flexible seal and the second flexible seal are elastic silicone, and the base materials of the first rigid seal and the second rigid seal are copper.

[0015] The utility model also provides a blast furnace, which comprises the blast furnace tuyere with a double sealing structure function and a furnace body, wherein the blast furnace tuyere with a double sealing structure function is arranged at the air inlet end of the furnace body.

[0016] The above technical solution of the utility model has the following advantages compared with the prior art:

[0017] The blast furnace tuyere and blast furnace with a double sealing structure function described in the utility model are used to perform interference filling of the connection gaps of the first air guide, the second air guide and the third air guide by the first flexible seal and the second flexible seal, as well as the first rigid seal and the second rigid seal, thereby achieving a double sealing effect of the rigid seal and the flexible seal. Even after the air guide is deformed at high temperature, the above-mentioned connection gaps can still be highly sealed, thereby avoiding the problem of blast furnace gas leakage. In addition, the present application can also greatly reduce the replacement frequency of the above-mentioned components, saving manpower and material resources while indirectly improving its operating efficiency. Compared with the conventional blast furnace structure at this stage, the present application has significant advantages such as simple structure, low cost, good sealing effect, wide application range and reduced maintenance and replacement frequency, and has broad application prospects in this industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the internal structure of a blast furnace tuyere with a double sealing structure function in a preferred embodiment of the present utility model;

[0020] Figure 2 yes Figure 1A schematic diagram of the three-dimensional structure of the second air guide member in the blast furnace tuyere with a double sealing structure function is shown;

[0021] Figure 3 yes Figure 2 A in the middle is an enlarged schematic diagram;

[0022] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the third air guide member in the blast furnace tuyere with a double sealing structure function is shown;

[0023] Figure 5 Yes Figure 4 Enlarged schematic diagram of point B in the middle.

[0024] Explanation of the reference numerals in the specification: 100, first air guide; 110, first cylinder; 111, serpentine cooling water pipe; 120, connecting portion; 130, limiting portion 130; 200, second air guide; 210, second cylinder; 211, first cooling bin; 220, first flexible seal; 230, first rigid seal; 300, third air guide; 310, third cylinder; 311, reinforcement; 312, second cooling bin; 320, second flexible seal; 330, second rigid seal. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0026] Example 1

[0027] See also Figure 1As shown, this embodiment provides a blast furnace tuyere with a double sealing structure function, which includes: a first air guide 100, the first air guide 100 is connected to the air outlet end of the furnace body of the blast furnace, and includes a first cylinder 110; a second air guide 200, the second air guide 200 includes a second cylinder 210, a first rigid seal 230 and a first flexible seal 220, the second cylinder 210 has a smaller diameter than the first cylinder 110, and is connected to the first cylinder 110, the first rigid seal 230 is arranged at the junction of the second cylinder 210 and the first cylinder 110, and is provided with a first connecting groove, the first flexible seal 220 is arranged inside the first connecting groove, and is interference-embedded between the inner wall of the first cylinder 110 and the outer wall of the second cylinder 210, and the contact area of the first rigid seal 230 with the gas in the furnace is larger than that of the second cylinder 210. The contact area between the second cylinder 210 and the gas in the furnace; the third air guide 300, the third air guide 300 includes a second rigid seal 330, a third cylinder 310 and a second flexible seal 320, the diameter of the third cylinder 310 is smaller than that of the second cylinder 210, and it is connected to the second cylinder 210, the air guide channel passes through the first cylinder 110, the second cylinder 210 and the third cylinder 310, the second rigid seal 330 is arranged at the junction of the third cylinder 310 and the second cylinder 210, and is provided with a second connecting groove, the second flexible seal 320 is arranged inside the second connecting groove, and is interference-embedded between the inner wall of the second cylinder 210 and the outer wall of the third cylinder 310, the contact area between the second rigid seal 330 and the gas in the furnace is greater than the contact area between the third cylinder 310 and the gas in the furnace.

[0028] The blast furnace tuyere with a double sealing structure function described in this embodiment performs interference filling of the connection gaps of the first air guide, the second air guide, and the third air guide through the first flexible seal 220 and the second flexible seal, as well as the first rigid seal and the second rigid seal, thereby achieving a double sealing effect of the rigid seal and the flexible seal. Even after the air guide is deformed at high temperature, the above-mentioned connection gaps can be highly sealed, thereby avoiding the problem of blast furnace gas leakage. In addition, the present application can also greatly reduce the replacement frequency of the above-mentioned components, saving manpower and material resources while indirectly improving its operating efficiency. Compared with the conventional blast furnace structure at this stage, the present application has significant advantages such as simple structure, low cost, good sealing effect, wide application range, and reduced maintenance and replacement frequency, and has broad application prospects in this industry.

[0029] See also Figure 1As shown, the blast furnace tuyere with a double sealing structure function in this embodiment is used to guide the blast furnace exhaust, wherein the first air guide member 100 has the largest diameter, and the third air guide member 300 has the smallest diameter, thereby making the diameter of the air guide channel in the gas flow direction gradually reduced to achieve steady flow and directional discharge of the gas. Specifically, the side walls of the first cylinder 110, the second cylinder 210 and the third cylinder 310 are all inclined to make the gas flow inside the first cylinder 110, the second cylinder 210 and the third cylinder 310 change evenly.

[0030] Among them, the first air guide 100 is connected to the exhaust port of the furnace body, and the first cylinder 110 is provided with a connecting portion 120 at one end close to the furnace body. In the direction of gas flow, the connecting portion 120 is tilted outward from the first cylinder 110 toward the furnace body, thereby improving its connection stability. Furthermore, the first air guide 100 also includes a limiting portion 130, which is connected to the outer wall of the first cylinder 110 and is arranged close to the furnace body to limit the first cylinder 110 in the direction of gas flow. In this embodiment, the limiting portion 130 protrudes outward from the outer surface of the first cylinder 110, and is used to cooperate with the external structure to limit the gas flow direction of the blast furnace tuyere with a double sealing structure. Furthermore, a serpentine cooling water pipe 111 is provided on the side wall of the first cylinder 110 in this embodiment to cool it by water.

[0031] See also Figure 2 As shown, the first flexible seal 220 in this embodiment is preferably an O-ring element, and its base material is selected to be elastic silicone. The first connecting groove is recessed inward from the outer wall of the first rigid seal 230, and the recessed depth of the first connecting groove is less than the thickness of the first flexible seal 220, so that the first flexible seal 220 and the first cylinder 110 have an interference fit. Correspondingly, see Figure 3 As shown, the second connecting groove in this embodiment is recessed inward from the outer wall of the second rigid seal 330. The depth of the recess is less than the thickness of the second flexible seal 320, thereby ensuring an interference fit between the second flexible seal 320 and the second cylindrical body 210. Similarly, the base material of the second flexible seal 320 is also configured as elastic silicone. Specifically, the materials of both the first rigid seal 230 and the second rigid seal 330 in this embodiment are preferably copper.

[0032] See also Figures 2 to 5As shown, the first rigid seal 230 in this embodiment is provided to protrude outward from the outer wall of the second cylinder 210, and is provided to have an inclined arc-shaped inclined surface structure, thereby enabling it to have both sealing and installation guiding functions. Correspondingly, the second rigid seal 330 is provided to protrude outward from the outer wall of the third cylinder 310, and its specific structure is the same as that of the first rigid seal 230, and no further details will be given here.

[0033] In the present embodiment, the base materials of the first cylinder 110, the second cylinder 210 and the third cylinder 310 are copper. In order to reduce the overall mass and facilitate installation, in the present embodiment, a first cooling chamber 211 is provided between the inner wall and the outer wall of the second cylinder 210, and a second cooling chamber 312 is provided between the inner wall and the outer wall of the third cylinder 310. A reinforcement 311 is provided in each of the first cooling chamber 211 and the second cooling chamber 312. The two ends of the reinforcement 311 abut against the inner wall and the outer wall of the second cylinder 210 and the inner wall and the outer wall of the third cylinder 310 respectively. In this way, the cooling effect of the second cylinder 210 and the third cylinder 310 can be achieved, and the two can have sufficient supporting strength. In other embodiments, the first cylinder 110, the second cylinder and the third cylinder 310 can also be set to other metals, and the first flexible sealing rib and the second flexible sealing member 320 can also be set to other materials with elastic sealing effect. This new use does not make specific restrictions on this.

[0034] Example 2

[0035] This embodiment provides a blast furnace, which includes the blast furnace tuyere with a double sealing structure function and a furnace body as described in the first embodiment, wherein the blast furnace tuyere with a double sealing structure function is arranged at the air inlet end of the furnace body.

[0036] In summary, the blast furnace tuyere and blast furnace with a double sealing structure function described in the utility model, through the first flexible seal 220 and the second flexible seal 320, as well as the first rigid seal and the second rigid seal, the connection gaps of the first air guide, the second air guide and the third air guide are interference filled, thereby achieving a double sealing effect of the rigid sealant and the flexible seal, even after the air guide is deformed at high temperature, the above-mentioned connection gaps can be highly sealed, thereby avoiding the problem of blast furnace gas leakage. In addition, the present application can also greatly reduce the replacement frequency of the above-mentioned components, saving manpower and material resources while indirectly improving its operating efficiency. Compared with the conventional blast furnace structure at this stage, the present application has significant advantages such as simple structure, low cost, good sealing effect, wide range of use and reduced maintenance and replacement frequency, and has broad application prospects in this industry.

[0037] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A blast furnace tuyere with a double sealing structure, characterized by: include: A first air guide member connected to an air supply end of the air supply device, comprising a first cylinder; A second air guide, the second air guide comprising a second cylinder, a first rigid seal and a first flexible seal, the second cylinder having a smaller diameter than the first cylinder and being connected to the first cylinder, the first rigid seal being arranged at the junction of the second cylinder and the first cylinder, and having a first connecting groove thereon, the first flexible seal being arranged inside the first connecting groove and interference-embedded between the inner wall of the first cylinder and the outer wall of the second cylinder, the contact area between the first rigid seal and the furnace gas being greater than the contact area between the second cylinder and the furnace gas; The third air guide member includes a third cylinder, a second rigid seal and a second flexible seal. The third cylinder has a smaller diameter than the second cylinder and is connected to the second cylinder. The air guide channel passes through the first cylinder, the second cylinder and the third cylinder. The second rigid seal is arranged at the junction of the third cylinder and the second cylinder, and is provided with a second connecting groove. The second flexible seal is arranged inside the second connecting groove and is interference-embedded between the inner wall of the second cylinder and the outer wall of the third cylinder. The contact area between the second rigid seal and the gas in the furnace is greater than the contact area between the third cylinder and the gas in the furnace.

2. The blast furnace tuyere with a double sealing structure according to claim 1, characterized in that: The first air guide member further includes a limiting portion, which is connected to the outer wall of the first cylinder and is arranged close to the furnace body to limit the first cylinder in the gas flow direction.

3. The blast furnace tuyere with a double sealing structure according to claim 1, characterized in that: A connecting portion is provided at one end of the first cylinder close to the furnace body. In the direction of gas flow, the connecting portion is inclined outward from the first cylinder toward the furnace body.

4. The blast furnace tuyere with a double sealing structure according to claim 1, characterized in that: A serpentine cooling water pipe is provided on the side wall of the first cylinder.

5. The blast furnace tuyere with a double sealing structure according to claim 1, characterized in that: The first connecting groove is recessed inwardly from the outer wall of the first rigid seal, and the recessed depth of the first connecting groove is less than the thickness of the first flexible seal, so that the first flexible seal and the first cylinder are interference-fitted.

6. The blast furnace tuyere with a double sealing structure according to claim 1, characterized in that: The second connecting groove is recessed inwardly from the outer wall of the second rigid seal, and the recessed depth of the second connecting groove is less than the thickness of the second flexible seal, so that the second flexible seal and the second cylinder are interference fit.

7. The blast furnace tuyere with a double sealing structure according to claim 1, characterized in that: A first cooling bin is provided between the inner wall and outer wall of the second cylinder, and a second cooling bin is provided between the inner wall and outer wall of the third cylinder. Reinforcements are provided in both the first cooling bin and the second cooling bin, and both ends of the reinforcements abut against the inner wall and outer wall of the second cylinder and the inner wall and outer wall of the third cylinder respectively.

8. The blast furnace tuyere with a double sealing structure according to claim 1, characterized in that: The side walls of the first cylinder, the second cylinder and the third cylinder are all inclined so that the gas flow rates inside the first cylinder, the second cylinder and the third cylinder are uniformly changed.

9. The blast furnace tuyere with a double sealing structure according to claim 1, characterized in that: The base materials of the first flexible seal and the second flexible seal are elastic silicone, and the base materials of the first rigid seal and the second rigid seal are copper.

10. A blast furnace, characterized in that: It comprises a blast furnace tuyere with a double sealing structure function and a furnace body as described in any one of claims 1 to 9, wherein the blast furnace tuyere with a double sealing structure function is arranged at the air inlet end of the furnace body.

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