Device for treating blockages in blast furnace air pipe and blast furnace air pipe

Abstract

The utility model discloses a blast furnace air pipe and a device for treating blockages inside the blast furnace air pipe, and relates to the technical field of metallurgical equipment, the device comprises a tee joint, a ball valve and a metal flexible connecting pipe, the first end of the tee joint is used for being connected and communicated with an air pipe large cover inserting plate of the blast furnace air pipe, and the second end of the tee joint is used for being connected and communicated with an air pipe peephole cap; one end of the ball valve is connected and communicated with the third end of the tee joint; one end of the metal flexible connecting pipe is used for being connected and communicated with the first end, away from the tee joint, of the ball valve, and the other end of the metal flexible connecting pipe is used for being connected and communicated with a medium-pressure nitrogen source.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical equipment, in particular to a device for treating blockages inside a blast furnace air duct and a blast furnace air duct. Background Technique

[0002] During the process of blast furnace ironmaking, raw fuels such as ore and coke are charged from the top of the furnace. The stock column accumulated in the furnace is affected by the high-temperature reducing coal gas flowing countercurrently upwards, and is continuously heated, decomposed, reduced, melted, dripped, etc. These physical and chemical processes are not only complex and changeable, but also affected by factors such as the furnace internal environment, and there will be some mixtures of incompletely melted furnace materials, slag and iron, etc., which are either adhered to the furnace wall or stay in inactive areas, etc. Whenever the furnace condition is not smooth, such as hanging materials, dropping materials, or a large reduction in air volume, the remaining furnace materials (coke, ore) will be poured into the middle and rear parts of the air duct and the large cover, and the inside of the tuyere will be completely blocked and turn black. In addition, after some refractory materials inside the blast furnace air supply system are damaged, they will be carried by the hot air to the dead zone at the rear of the air duct and cause blockages.

[0003] In August 2023, the furnace condition of a certain blast furnace fluctuated, resulting in hanging materials, and then the air volume was reduced and the materials were dropped. When the air volume was reduced to 1000 MPa / h and the air pressure was 0.05 MPa, the falling coke and ore splashed into the tuyere and the inside of the air duct. After the air returned, the materials at the front end of the air duct were blown into the furnace by the hot air. Since the end of the air duct is a non-circulating area, blockages occurred at the ends of the 20#, 22#, and 23# air ducts, the peepholes turned black, and the internal situation could not be observed. It was impossible to normally inject coal and check whether there were bends or slag hanging on the tuyere. Safety in production is of utmost importance, and it is necessary to prevent problems before they occur. Therefore, it is necessary to timely clean the furnace materials and refractory materials inside the air duct. Usually, the post personnel open the peephole or the plug plate to discharge, but this operation will cause splashes to burn and scald personnel, and long-term discharge will cause damage to the sealing surface of the large cover and air leakage, forcing the air volume to be reduced for treatment or the furnace to be stopped for replacement, which poses a major safety hazard.

[0004] After the blast furnace is stopped and the air returns, there is a lot of accumulated ash in the furnace materials, which is easy to block the peephole. Usually, the peephole is opened to release the ash, resulting in high noise and a lot of dust, which is not conducive to environmental protection. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for treating blockages inside a blast furnace air duct and a blast furnace air duct, so as to solve the problems existing in the above-mentioned prior art, with a simple structure and convenient operation, and effectively clean the blockages inside the air duct.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The present utility model provides a device for dealing with blockages inside a blast furnace air duct, comprising: a tee, a ball valve, and a metal flexible connecting pipe. The first end of the tee is used to connect and communicate with the plug plate of the air duct cover of the blast furnace air duct, and the second end of the tee is used to connect and communicate with the viewing hole cap of the air duct; one end of the ball valve is used to connect and communicate with the third end of the tee; one end of the metal flexible connecting pipe is used to connect and communicate with the first end of the ball valve away from the tee, and the other end is used to connect and communicate with a medium-pressure nitrogen gas source.

[0008] Preferably, it further comprises a medium-pressure nitrogen gas source, which is connected and communicated with the metal flexible connecting pipe.

[0009] Preferably, the pressure of the nitrogen gas output by the medium-pressure nitrogen gas source is 13 Mpa to 15 Mpa.

[0010] Preferably, it further comprises a short pipe. One end of the short pipe is used to connect and communicate with the first end of the tee, and the other end is used to connect and communicate with the plug plate of the air duct cover of the blast furnace air duct.

[0011] Preferably, it further comprises a cock valve. One end of the cock valve is used to connect and communicate with the first end of the tee, and the other end is used to connect and communicate with the short pipe.

[0012] Preferably, it further comprises a quick connector, which is used to connect the ball valve and the metal flexible connecting pipe.

[0013] Preferably, the quick connector is a DN25 quick connector, the ball valve is a DN25 ball valve, the tee is a DN25 cast iron tee, the short pipe is a DN25 short pipe, and the cock valve is a DN25 cock valve.

[0014] The present utility model also provides a blast furnace air duct, comprising:

[0015] The device for dealing with blockages inside a blast furnace air duct as described above.

[0016] The present utility model has achieved the following technical effects compared with the prior art:

[0017] The present utility model provides a device for dealing with blockages inside a blast furnace air duct and a blast furnace air duct. By adding a tee pipe between the plug plate of the air duct cover of the blast furnace air duct and the viewing hole cap of the air duct, and connecting the other end of the tee to a metal flexible connecting pipe, and connecting the metal flexible connecting pipe to a medium-pressure nitrogen gas source, the nitrogen gas with pressure is transported from the metal flexible connecting pipe to the tee through the medium-pressure nitrogen gas source, and then blown into the air duct through the plug plate of the air duct cover to blow the blockage into the furnace, thus completing the cleaning of the blockage inside the air duct. The structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram when the device provided by the present invention for dealing with the blockage inside the blast furnace air duct is in use;

[0020] In the figure: 1, air duct body; 2, blockage; 3, large air duct cover; 4, large air duct cover plug board; 5, short pipe; 6, plug valve; 7, tee; 8, air duct peephole cap; 9, ball valve; 10, metal flexible connection pipe; 11, medium-pressure nitrogen gas source. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide a device and a blast furnace air duct for dealing with the blockage inside the blast furnace air duct, so as to solve the problems existing in the above-mentioned prior art, with a simple structure and convenient operation, and effectively clean the blockage inside the air duct.

[0023] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0024] Embodiment 1

[0025] This embodiment provides a device for dealing with the blockage inside the blast furnace air duct, such as Figure 1As shown in the figure, it includes: a tee 7, a ball valve 9 and a metal flexible connection pipe 10. The first end of the tee 7 is used to connect and communicate with the air duct large cover plug 4 of the blast furnace air duct. The second end of the tee 7 is used to connect and communicate with the air duct peephole cap 8. One end of the ball valve 9 is used to connect and communicate with the third end of the tee 7. One end of the metal flexible connection pipe 10 is used to connect and communicate with the first end of the ball valve 9 away from the tee 7, and the other end is used to connect and communicate with the medium-pressure nitrogen gas source 11. By adding a tee 7 pipe between the air duct large cover plug 4 and the air duct peephole cap 8 of the blast furnace air duct, and connecting the other end of the tee 7 to the metal flexible connection pipe 10, connecting the metal flexible connection pipe 10 to the medium-pressure nitrogen gas source 11, and transporting the pressurized nitrogen gas from the metal flexible connection pipe 10 to the tee 7 through the medium-pressure nitrogen gas source 11, and blowing the blockage 2 into the furnace through the air duct large cover plug 4, the blockage 2 inside the air duct is cleaned. The structure is simple and the operation is convenient.

[0026] In a preferred solution of this embodiment, the device for dealing with the blockage inside the blast furnace air duct further includes a medium-pressure nitrogen gas source 11, and the medium-pressure nitrogen gas source 11 is connected and communicated with the metal flexible connection pipe 10, which is convenient for use.

[0027] In a preferred solution of this embodiment, the pressure of the nitrogen gas output by the medium-pressure nitrogen gas source 11 is 13 Mpa to 15 Mpa, providing sufficient pressure.

[0028] In a preferred solution of this embodiment, the device for dealing with the blockage inside the blast furnace air duct further includes a short pipe 5. One end of the short pipe 5 is used to connect and communicate with the first end of the tee 7, and the other end is used to connect and communicate with the air duct large cover plug 4 of the blast furnace air duct. The structure is simple, the connection is convenient, and the material is easy to obtain.

[0029] In a preferred solution of this embodiment, the device for dealing with the blockage inside the blast furnace air duct further includes a quick connector, and the quick connector is used to connect the ball valve 9 and the metal flexible connection pipe 10. The structure is simple, the material is easy to obtain, and it can be quickly connected.

[0030] In a preferred solution of this embodiment, the quick connector is a DN25 quick connector, the ball valve 9 is a DN25 ball valve 9, the tee 7 is a DN25 cast iron tee 7, the short pipe 5 is a DN25 short pipe 5, and the plug valve 6 is a DN25 plug valve 6.

[0031] Embodiment Two

[0032] This embodiment also provides a blast furnace air duct, including:

[0033] The air duct body 1, the device for dealing with blockages inside the blast furnace air duct as described above, the air duct peephole cap 8, the air duct large cover 3, the plug valve 6 and the air duct large cover plug plate 4. The device for dealing with blockages inside the blast furnace air duct is arranged between the air duct peephole cap 8 and the plug valve 6. The air duct large cover 3 is arranged on the air duct body 1, and the air duct large cover plug plate 4 is arranged on the air duct large cover 3. The plug valve 6 is connected to and communicates with the air duct large cover plug plate 4.

[0034] Specific installation process:

[0035] Close the plug cock valve 6, remove the air duct peephole cap 8, and connect a reverse blowing device consisting of a tee 7, a ball valve 9 and a quick connector through a short pipe 5. The quick connector is connected to the medium-pressure nitrogen gas source 11 through a metal flexible connection, and the air duct peephole cap 8 is installed on the second end of the tee 7.

[0036] Open the medium-pressure nitrogen valve and the plug valve 6, and observe the internal situation of the air duct through the air duct peephole cap 8 to adjust the valve to control the air volume.

[0037] In this utility model, specific examples are used to elaborate on the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and its core idea of the utility model; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be construed as a limitation to the utility model.

Claims

1. A device for treating blockage inside a blast furnace air duct, characterized in that: include: A tee, wherein the first end of the tee is used to be connected and communicated with the large cover plug plate of the blast furnace duct, and the second end of the tee is used to be connected and communicated with the peephole cap of the duct; A ball valve, one end of which is used to be connected and communicated with the third end of the tee; A metal flexible connecting tube, one end of which is used to be connected and communicated with the first end of the ball valve away from the three-way connection, and the other end of which is used to be connected and communicated with a medium-pressure nitrogen gas source.

2. The device for treating blockage inside a blast furnace air duct according to claim 1, characterized in that: It also includes a medium-pressure nitrogen gas source, which is connected and communicated with the metal soft connecting pipe.

3. The device for treating blockage inside a blast furnace air duct according to claim 2, characterized in that: The pressure of the nitrogen output by the medium-pressure nitrogen source is 13Mpa to 15Mpa.

4. The device for treating blockage inside a blast furnace air duct according to claim 3, characterized in that: It also includes a short tube, one end of which is used to be connected and communicated with the first end of the tee, and the other end of which is used to be connected and communicated with the large air duct cover plug plate of the blast furnace air duct.

5. The device for treating blockage inside a blast furnace air duct according to claim 4, characterized in that: It also includes a quick connector, which is used to connect the ball valve and the metal soft connecting pipe.

6. The device for treating blockage inside a blast furnace air duct according to claim 5, characterized in that: The quick connector is a DN25 quick connector, the ball valve is a DN25 ball valve, the tee is a DN25 cast iron tee, and the short pipe is a DN25 short pipe.

7. A blast furnace air duct, characterized in that: include: A device for treating blockages inside a blast furnace air duct as claimed in any one of claims 1 to 6.

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