Coke oven denitration pipe connecting structure

Abstract

The utility model discloses a coke oven denitration pipe connecting structure which comprises a denitration pipe body, an inner cavity is formed in the denitration pipe body, a first connecting part is arranged on the end portion of the first end of the denitration pipe body, a second connecting part is arranged on the end portion of the second end of the denitration pipe body, and the first connecting part is connected with the second connecting part. The outer diameter of the first connecting part is matched with the inner diameter of the second connecting part; according to the two sections of denitration pipe bodies, the first connecting part on one section of denitration pipe body is inserted into the second connecting part on the other section of denitration pipe body to form connection. By adopting the first connecting part and the second connecting part, namely a connecting mode of the male head and the female head, the overall denitration rate is ensured, meanwhile, the production qualification rate is greatly improved, the production efficiency and the mounting speed are improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of refractory materials technology. Specifically, it relates to a connection structure for a denitrification pipe in a coke oven. Background Technology

[0002] Coke ovens generate a large amount of combustion waste gas during production, which contains a significant amount of nitrogen oxides (NOx). x Direct emissions of coke oven combustion gases have caused serious environmental pollution. my country stipulates that from January 1, 2015, existing coking plants must comply with the GB16171-2012 emission standard. This means that the combustion gases produced by current coking plants must undergo denitrification treatment before being released.

[0003] In this new technology, denitrification takes place in a regenerator chamber. A denitrification pipe with spaced-out nozzles is installed within the chamber, and ammonia water or ammonia gas flows through the pipe. The ammonia water or gas is injected into the regenerator chamber through the nozzles, reacting with nitrogen oxides to achieve denitrification. Since coke ovens are typically over ten meters wide, traditional methods are insufficient for producing such long denitrification pipes. Patent document CN112742210A discloses a coke oven denitrification pipe and its preparation method, using a threaded connection to achieve the production of ultra-long denitrification pipes. However, this connection method results in a low yield rate, slow production and installation speed, and high labor intensity for workers. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide a coke oven denitrification pipe connection structure that improves the production qualification rate, increases the installation speed, and reduces the labor intensity of workers.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a coke oven denitrification pipe connection structure, including a denitrification pipe body, an inner cavity formed within the denitrification pipe body, a first connecting part provided at a first end of the denitrification pipe body, and a second connecting part provided at a second end of the denitrification pipe body, wherein the outer diameter of the first connecting part matches the inner diameter of the second connecting part; two sections of the denitrification pipe body: the first connecting part on one section of the denitrification pipe body is inserted into the second connecting part on the other section of the denitrification pipe body to form a connection. By setting the mutually cooperating first and second connecting parts, multiple sections of the denitrification pipe body can be connected, realizing the production of ultra-long denitrification pipes, and improving the pass rate and production and installation speed.

[0006] In the above-mentioned coke oven denitrification pipe connection structure, a pin is provided through the second connection part along its radial direction, and the end of the pin passes through the first connection part. By providing the pin, the connection strength can be improved.

[0007] In the aforementioned coke oven denitrification pipe connection structure, a stepped hole is formed on the first connecting part along its radial direction, and a connecting hole is formed on the second connecting part along its radial direction. The connecting hole and the stepped hole are aligned and connected in the circumferential direction. The pin passes through the connecting hole and enters the stepped hole. By setting the stepped hole to cooperate with the pin, the pin is positioned and restrained, facilitating installation and enabling rapid installation.

[0008] In the above-mentioned coke oven denitrification pipe connection structure, the large-diameter end of the stepped hole penetrates the outer circumferential surface of the first connecting part, and the small-diameter end of the stepped hole penetrates the inner circumferential surface of the first connecting part; the inner diameter of the connecting hole is equal to the inner diameter of the large-diameter end of the stepped hole; one end of the pin is fitted inside the connecting hole and the large-diameter end of the stepped hole, and the other end of the pin is fitted inside the small-diameter end of the stepped hole.

[0009] The above-mentioned coke oven denitrification pipe connection structure includes a pin comprising a first connecting section and a second connecting section. The diameter of the first connecting section is larger than the diameter of the second connecting section. The first connecting section is inserted into the connecting hole and the large-diameter end of the stepped hole. The end face of the first connecting section is in contact with the stepped surface of the stepped hole. The second connecting section is inserted into the small-diameter end of the stepped hole.

[0010] In the aforementioned coke oven denitrification pipe connection structure, the outer diameter of the first connecting part gradually decreases from the end connected to the denitrification pipe body to the other end; the inner diameter of the second connecting part gradually increases from the end connected to the inner cavity to the other end. The tapered first and second connecting parts improve the sealing effect while ensuring the coaxiality of the denitrification pipe body.

[0011] In the aforementioned coke oven denitrification pipe connection structure, the outer circumferential surface of the first connecting part and the free end face of the first connecting part are connected by an arc surface transition; the inner circumferential surface of the second connecting part and the inner circumferential surface of the inner cavity are connected by a conical hole transition; when the first connecting part is inserted into the second connecting part, the arc surface is tightly fitted against the wall of the conical hole. By setting the arc surface and the conical hole to be in close contact, the sealing effect is further improved.

[0012] In the above-mentioned coke oven denitrification pipe connection structure, the first connection part is a male connector provided on the first end of the denitrification pipe body. The outer diameter of the male connector is smaller than the outer diameter of the denitrification pipe body, and the inner diameter of the male connector is equal to the inner diameter of the inner cavity.

[0013] In the above-mentioned coke oven denitrification pipe connection structure, the second connection part is a female head disposed in the second end of the denitrification pipe body. The outer diameter of the female head is equal to the outer diameter of the denitrification pipe body, the inner diameter of the female head is larger than the inner diameter of the denitrification pipe body, and the inner diameter of the female head and the outer diameter of the male head are clearance-fitted.

[0014] The above-mentioned coke oven denitrification pipe connection structure has an installation hole on the denitrification pipe body, and a nozzle is installed in the installation hole.

[0015] The technical solution of this utility model has achieved the following beneficial technical effects:

[0016] By adopting a first connection part and a second connection part, namely a male head and a female head connection method, the overall denitrification rate is guaranteed while the production qualification rate is greatly improved, and the production efficiency and installation speed are increased, while reducing the labor intensity of workers. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of the connection between the two denitrification tube bodies of this utility model;

[0018] Figure 2 A partial cross-sectional view of the connection between the two denitrification tubes of this utility model;

[0019] Figure 3 A partial cross-sectional view of the first connecting part of this utility model;

[0020] Figure 4 A partial cross-sectional view of the second connecting part of this utility model;

[0021] Figure 5 A schematic diagram of the structure of the pin of this utility model.

[0022] The reference numerals in the figure are as follows: 1-Denitrification tube body; 2-Inner cavity; 3-Nozzle; 4-Pin; 41-First connecting section; 42-Second connecting section; 5-First connecting part; 6-Stepped hole; 7-Second connecting part; 8-Connecting hole; 9-Mounting hole; 10-Arc surface; 11-Conical hole. Detailed Implementation

[0023] This embodiment presents a coke oven denitrification pipe connection structure, such as... Figure 1-2As shown, the device includes a denitrification tube body 1, with an inner cavity 2 formed inside. The denitrification tube body 1 has an installation hole 9, in which a nozzle 3 is installed. A first connecting part 5 is provided at the first end of the denitrification tube body 1, and a second connecting part 7 is provided at the second end of the denitrification tube body 1. The outer diameter of the first connecting part 5 matches the inner diameter of the second connecting part 7. Two sections of the denitrification tube body 1 are connected: the first connecting part 5 on one section is inserted into the second connecting part 7 on the other section. Each section of the denitrification tube body 1 has an outer diameter of 70 mm, an inner diameter of 30 mm, and a length of 960 mm.

[0024] like Figure 3 As shown, the first connecting part 5 is a male connector disposed on the first end of the denitrification tube body 1. The outer diameter of the male connector is smaller than the outer diameter of the denitrification tube body 1, and the inner diameter of the male connector is equal to the inner diameter of the inner cavity 2. Figure 4 As shown, the second connecting part 7 is a female connector disposed inside the second end of the denitrification pipe body 1. The outer diameter of the female connector is equal to the outer diameter of the denitrification pipe body 1, and the inner diameter of the female connector is larger than the inner diameter of the denitrification pipe body 1. Furthermore, the inner diameter of the female connector and the outer diameter of the male connector are in clearance fit. The male connector is machined on the end of the denitrification pipe body 1, while the female connector is formed by pressing during the manufacturing process.

[0025] like Figure 2 As shown, the outer diameter of the first connecting part 5 gradually decreases from the end connected to the denitrification tube body 1 to the other end, with a male length of 75mm, a large diameter end diameter of 55mm, and a small diameter end diameter of 53mm; the inner diameter of the second connecting part 7 gradually increases from the end connected to the inner cavity 2 to the other end, with a female length of 80mm, a large diameter end inner diameter of 55mm, and a small diameter end inner diameter of 53mm; forming a tapered male and a tapered female head, improving the sealing effect, assembly speed, and achieving automatic coaxial positioning.

[0026] like Figure 2-4 As shown, to further ensure the sealing effect, the outer circumferential surface of the first connecting part 5 and the free end face of the first connecting part 5 are connected by a circular arc surface 10, the size of which is R35mm; the inner circumferential surface of the second connecting part 7 and the inner circumferential surface of the inner cavity 2 are connected by a conical hole 11, the inner diameter of the large diameter end of the conical hole 11 is 53mm, the inner diameter of the small diameter end is 30mm, and the length is 11mm; when the first connecting part 5 is inserted into the second connecting part 7, the circular arc surface 10 fits tightly against the hole wall of the conical hole 11. During assembly, the male head can be smoothly inserted into the female head, and the circular arc surface 10 of the male head can be in close contact with the conical hole 11 of the female head.

[0027] like Figure 2As shown, in order to improve the connection strength of the denitrification tube body 1, a pin 4 is provided through the second connecting part 7 along its radial direction, and the end of the pin 4 passes through the first connecting part 5.

[0028] Specifically, such as Figure 3 As shown, a stepped hole 6 is provided on the first connecting part 5 along its radial direction. The large-diameter end of the stepped hole 6 penetrates the outer circumferential surface of the first connecting part 5, and the small-diameter end of the stepped hole 6 penetrates the inner circumferential surface of the first connecting part 5.

[0029] like Figure 4 As shown, the second connecting part 7 has a connecting hole 8 along its radial direction. The inner diameter of the connecting hole 8 is equal to the inner diameter of the large diameter end of the stepped hole 6. The connecting hole 8 and the stepped hole 6 are aligned and connected in the circumferential direction. One end of the pin 4 is fitted in the connecting hole 8 and the large diameter end of the stepped hole 6, and the other end of the pin 4 is fitted in the small diameter end of the stepped hole 6.

[0030] like Figure 2 , Figure 5 As shown, the pin 4 includes a first connecting section 41 and a second connecting section 42. The diameter of the first connecting section 41 is larger than the diameter of the second connecting section 42. The first connecting section 41 has a diameter of 21 mm and a height of 23 mm, while the second connecting section 42 has a diameter of 15 mm and a height of 12 mm. The first connecting section 41 is inserted into the connecting hole 8 and the large-diameter end of the stepped hole 6. The inner diameter of both the connecting hole 8 and the large-diameter end of the stepped hole 6 is 22 mm. The inner diameter of the small-diameter end of the stepped hole 6 is 16 mm and the length is 5 mm. Fire putty is applied to the stepped hole 6 and the connecting hole 8 to ensure the installation strength of the pin 4. The end face of the first connecting section 41 is in contact with the stepped surface of the stepped hole 6. The second connecting section 42 is inserted into the small-diameter end of the stepped hole 6 and into the inner cavity 2. The length of the second connecting section 42 inserted into the inner cavity is 0-10 mm. After optimization, while ensuring that the overall denitrification rate is not affected, the product qualification rate has increased from 60% to over 95% due to the reduced manufacturing difficulty, and the installation method has been simplified, increasing the installation speed by 20%.

[0031] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A coke oven denitrification pipe connection structure, comprising a denitrification pipe body (1), wherein an inner cavity (2) is formed within the denitrification pipe body (1), characterized in that, A first connecting part (5) is provided on the first end of the denitrification tube body (1), and a second connecting part (7) is provided on the second end of the denitrification tube body (1). The outer diameter of the first connecting part (5) matches the inner diameter of the second connecting part (7). Two sections of the denitrification tube body (1): the first connecting part (5) on one section of the denitrification tube body (1) is inserted into the second connecting part (7) on the other section of the denitrification tube body (1) to form a connection.

2. The coke oven denitrification pipe connection structure according to claim 1, characterized in that, A pin (4) is provided through the second connecting part (7) along its radial direction, and the end of the pin (4) passes through the first connecting part (5).

3. The coke oven denitrification pipe connection structure according to claim 2, characterized in that, The first connecting part (5) has a stepped hole (6) along its radial direction, and the second connecting part (7) has a connecting hole (8) along its radial direction. The connecting hole (8) and the stepped hole (6) are aligned and connected in the circumferential direction. The pin (4) passes through the connecting hole (8) and enters the stepped hole (6).

4. The coke oven denitrification pipe connection structure according to claim 3, characterized in that, The large-diameter end of the stepped hole (6) penetrates the outer circumferential surface of the first connecting part (5), and the small-diameter end of the stepped hole (6) penetrates the inner circumferential surface of the first connecting part (5); the inner diameter of the connecting hole (8) is equal to the inner diameter of the large-diameter end of the stepped hole (6); one end of the pin (4) fits in the connecting hole (8) and the large-diameter end of the stepped hole (6), and the other end of the pin (4) fits in the small-diameter end of the stepped hole (6).

5. The coke oven denitrification pipe connection structure according to claim 4, characterized in that, The pin (4) includes a first connecting segment (41) and a second connecting segment (42). The diameter of the first connecting segment (41) is larger than the diameter of the second connecting segment (42). The first connecting segment (41) is inserted into the connecting hole (8) and the large-diameter end of the stepped hole (6). The end face of the first connecting segment (41) is in contact with the stepped surface of the stepped hole (6). The second connecting segment (42) is inserted into the small-diameter end of the stepped hole (6).

6. The coke oven denitrification pipe connection structure according to claim 1, characterized in that, The outer diameter of the first connecting part (5) gradually decreases from one end connected to the denitrification tube body (1) to the other end; the inner diameter of the second connecting part (7) gradually increases from one end connected to the inner cavity (2) to the other end.

7. A coke oven denitrification pipe connection structure according to any one of claims 1-6, characterized in that, The outer circumferential surface of the first connecting part (5) and the free end face of the first connecting part (5) are connected by a circular arc surface (10); the inner circumferential surface of the second connecting part (7) and the inner circumferential surface of the inner cavity (2) are connected by a conical hole (11); when the first connecting part (5) is inserted into the second connecting part (7), the circular arc surface (10) fits tightly against the wall of the conical hole (11).

8. The coke oven denitrification pipe connection structure according to claim 7, characterized in that, The first connecting part (5) is a male connector provided on the first end of the denitrification tube body (1). The outer diameter of the male connector is smaller than the outer diameter of the denitrification tube body (1), and the inner diameter of the male connector is equal to the inner diameter of the inner cavity (2).

9. The coke oven denitrification pipe connection structure according to claim 8, characterized in that, The second connecting part (7) is a female head disposed in the second end of the denitrification pipe body (1). The outer diameter of the female head is equal to the outer diameter of the denitrification pipe body (1), the inner diameter of the female head is greater than the inner diameter of the denitrification pipe body (1), and the inner diameter of the female head and the outer diameter of the male head are in clearance fit.

10. The coke oven denitrification pipe connection structure according to claim 1, characterized in that, The denitrification tube body (1) is provided with an installation hole (9), and a nozzle (3) is installed in the installation hole (9).

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