Device for reducing dust by replacing tuyere during damping down of blast furnace

Abstract

The utility model discloses a blast furnace damping down tuyere replacement dust fall device, and relates to the field of steel smelting production. The dust removal device comprises an annular dust removal air pipe, a dust removal leading-in pipe is installed on one side of the annular dust removal air pipe, an air port dust removal leading-out pipe is installed below the annular dust removal air pipe, an air port dust removal cover is arranged at the bottom of the air port dust removal leading-out pipe, and a remote control valve is arranged on the air port dust removal leading-out pipe. The dust removal device has the advantages that dust in a middle sleeve and a small sleeve of the tuyere can be effectively removed, the dust is reduced, the environment is better protected, and the harm of the dust to the body of a worker is reduced.

Description

Technical Field

[0001] The utility model relates to the field of steel smelting production, in particular to a device for reducing dust during the replacement of tuyere in a blast furnace. Background Art

[0002] The blast furnace tuyere is an important component for blast furnace ironmaking for air supply and coal injection. It is usually composed of a large tuyere sleeve, a middle tuyere sleeve and a small tuyere sleeve. The small tuyere sleeve is installed in the furnace wall between the furnace belly and the furnace. It is the innermost of the large, medium and small tuyere sleeves and has the worst use environment. When the middle and small tuyere sleeves are burned or deformed, they must be replaced in time. In the process of replacing the tuyere, it is usually necessary to use oxygen to vaporize the slag iron bonded in the furnace cylinder, or when the middle and small sleeves of the blast furnace tuyere cannot be pulled out, it is necessary to use an oxygen blowing pipe to cut open the middle and small sleeves of the tuyere, so as to pull out the middle and small sleeves of the tuyere. A large amount of dust will be generated during the use of the oxygen blowing pipe, which not only damages the environment but also causes harm to the operator's body. At present, there is no effective method for controlling or treating the dust generated by this operation process in the industry. Therefore, a device for reducing dust when replacing tuyere in blast furnaces is urgently needed. Utility Model Content

[0003] The purpose of the utility model is to provide a device for reducing dust in the tuyere when the blast furnace is shut down and replaced in view of the shortcomings and defects in the prior art. The device can effectively remove dust in the middle and small sleeves of the tuyere, which not only reduces dust and better protects the environment, but also reduces the harm caused by dust to the workers.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for reducing dust at the tuyere when the blast furnace is shut down and replaced, which comprises an annular dust removal duct 3, a dust removal inlet pipe 1 is installed on one side of the annular dust removal duct 3, a tuyere dust removal outlet pipe 2 is installed below the annular dust removal duct 3, a tuyere dust removal cover 5 is provided at the bottom of the tuyere dust removal outlet pipe 2, and a remote control valve 4 is provided on the tuyere dust removal outlet pipe 2.

[0005] Furthermore, a hot air surrounding pipe 6 is provided on the outer side of the tuyere dust removal outlet pipe 2 and the tuyere dust removal cover 5. The hot air surrounding pipe 6 is arranged below the annular dust removal air duct 3, and the annular dust removal air duct 3 does not interfere with the hot air surrounding pipe 6 and the blast furnace cooling wall connecting pipe.

[0006] Furthermore, a maintenance platform 10 is installed above the hot air surrounding pipe 6, and a tuyere middle sleeve 9 is connected to the bottom of the hot air surrounding pipe 6, and a tuyere small sleeve 8 is provided inside the tuyere middle sleeve 9.

[0007] Furthermore, a dust removal inspection valve 7 is installed at the connection between the dust removal inlet pipe 1 and the annular dust removal air duct 3 to facilitate the staff to perform dust removal inspection operations.

[0008] Furthermore, the tuyere dust removal cover 5 is arranged below the hot air surrounding pipe 6 .

[0009] Furthermore, the tuyere dust removal outlet pipes 2 and tuyere dust removal covers 5 are provided in plurality, and a remote control valve 4 is installed on each tuyere dust removal outlet pipe 2 .

[0010] After adopting the above technical scheme, the beneficial effect of the utility model is: the device can effectively remove the dust in the air outlet and the small set, which not only reduces the dust to better protect the environment, but also reduces the harm caused by the dust to the workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] Figure 2 yes Figure 1 The corresponding top view of the structure.

[0014] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of MM.

[0015] Explanation of the reference numerals: dust removal inlet pipe 1, tuyere dust removal outlet pipe 2, annular dust removal air duct 3, remote control valve 4, tuyere dust removal hood 5, hot air surrounding pipe 6, tuyere dust removal inspection valve 7, tuyere small sleeve 8, tuyere middle sleeve 9, inspection platform 10. DETAILED DESCRIPTION

[0016] See also Figure 1-Figure 3 As shown, the technical solution adopted in this specific embodiment is: it includes an annular dust removal air duct 3, a dust removal inlet pipe 1 is installed on one side of the annular dust removal air duct 3, an air outlet dust removal outlet pipe 2 is installed below the annular dust removal air duct 3, an air outlet dust removal cover 5 is provided at the bottom of the air outlet dust removal outlet pipe 2, and a remote control valve 4 is provided on the air outlet dust removal outlet pipe 2.

[0017] To be more specific, a hot air surrounding pipe 6 is provided on the outer side of the tuyere dust removal outlet pipe 2 and the tuyere dust removal cover 5. The hot air surrounding pipe 6 is arranged below the annular dust removal air duct 3, and the annular dust removal air duct 3 does not interfere with the hot air surrounding pipe 6 and the blast furnace cooling wall connecting pipe.

[0018] More specifically, an inspection platform 10 is installed above the hot air surrounding pipe 6, and a tuyere middle sleeve 9 is connected below the hot air surrounding pipe 6, and a tuyere small sleeve 8 is arranged inside the tuyere middle sleeve 9. The inspection platform 10 can facilitate inspection and maintenance by the staff.

[0019] More specifically, a dust removal inspection valve 7 is installed at the connection between the dust removal inlet pipe 1 and the annular dust removal air duct 3 to facilitate the dust removal inspection and maintenance work of the staff. The setting of the dust removal inspection valve 7 is conducive to the inspection and maintenance of the blast furnace tuyere dust removal branch pipe equipment and facilities under the condition that the blast furnace is in normal production and does not affect the operation of other dust removal facilities in the system.

[0020] More specifically, the tuyere dust removal cover 5 is arranged below the hot blast surrounding pipe 6. The tuyere dust removal cover 5 is conducive to fully absorbing the dust generated by the small sleeves in the tuyere when the blast furnace is replaced.

[0021] To explain more specifically, a plurality of tuyere dust removal outlet pipes 2 and tuyere dust removal covers 5 are provided, and a remote control valve 4 is installed on each tuyere dust removal outlet pipe 2 .

[0022] The working principle of the utility model is as follows: a dust removal inlet pipe 1 is led out from the opening of the dust removal main pipe closest to the blast furnace tuyere platform, and a tuyere dust removal inspection valve 7 is installed on the dust removal inlet pipe 1. The annular dust removal air duct 3 is arranged in a ring above the tuyere, and then led to a position closer to the tuyere through the tuyere dust removal outlet pipe 2. The tuyere dust collection hood 5 is close to the dust point so as to more completely absorb the dust generated by the blast furnace tuyere replacement. Because the blast furnace tuyere replacement tuyere small sleeve 8 and the tuyere middle sleeve 9 are in a wind-off state, the main dust removal facilities such as the blast furnace iron mouth and the molten iron tank position are in a non-working state, and the dust removal inlet pipe 1 opened from the dust removal main pipe does not affect the normal use of the main dust removal facilities of the blast furnace. Therefore, the dust reduction effect can be achieved without increasing the air volume of the dust removal fan and without increasing the selection specifications of the dust removal fan. In order to improve the intelligence level of steel enterprises, a smoke sensor can be installed above the tuyere. When the smoke sensor recognizes the smoke generated by the blast furnace tuyere, the remote control valve 4 is interlocked, so as to To realize intelligent control of blast furnace tuyere dust removal, in order to make the dust removal hood area above the tuyere as large as possible, during the blast furnace construction process, the tuyere dust removal outlet pipe 2 and the tuyere dust removal hood 5 should be installed above the tuyere first, and then the blast furnace cooling wall water inlet and outlet connecting pipe should be installed. When the blast furnace cooling wall water inlet and outlet connecting pipe encounters the tuyere dust removal hood 5, it can pass through the tuyere dust removal hood 5 without affecting the dust removal effect. However, if the cooling wall water inlet and outlet pipe connecting pipe is installed first and then the tuyere dust removal facilities are installed, the area of ​​the tuyere dust removal hood will be greatly limited, thereby affecting the dust removal effect.

[0023] The above is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A device for reducing dust from tuyere during blast furnace air stop and air change, characterized in that: It comprises an annular dust removal air duct (3), a dust removal inlet pipe (1) is installed on one side of the annular dust removal air duct (3), an air outlet dust removal outlet pipe (2) is installed below the annular dust removal air duct (3), an air outlet dust removal cover (5) is provided at the bottom of the air outlet dust removal outlet pipe (2), and a remote control valve (4) is provided on the air outlet dust removal outlet pipe (2).

2. The device for reducing dust from tuyere during blast furnace air stop and air change according to claim 1, characterized in that: A hot air enclosure pipe (6) is provided on the outer sides of the tuyere dust removal outlet pipe (2) and the tuyere dust removal cover (5); the hot air enclosure pipe (6) is arranged below the annular dust removal duct (3); and the annular dust removal duct (3) does not interfere with the hot air enclosure pipe (6) and the blast furnace cooling wall connecting pipe.

3. The device for reducing dust from tuyere during blast furnace air stop and air change according to claim 2, characterized in that: An inspection platform (10) is installed above the hot air surrounding pipe (6), and a tuyere middle sleeve (9) is connected to the bottom of the hot air surrounding pipe (6), and a tuyere small sleeve (8) is sleeved inside the tuyere middle sleeve (9).

4. The device for reducing dust from tuyere during blast furnace air stop and air change according to claim 1, characterized in that: A dust removal inspection valve (7) is installed at the connection between the dust removal inlet pipe (1) and the annular dust removal air duct (3) to facilitate dust removal inspection work by staff.

5. The device for reducing dust from tuyere during blast furnace shutdown and air change according to claim 1, characterized in that: The air outlet dust removal cover (5) is arranged below the hot air surrounding pipe (6).

6. The device for reducing dust from tuyere during blast furnace shutdown and air change according to claim 1, characterized in that: A plurality of tuyere dust removal outlet pipes (2) and tuyere dust removal covers (5) are provided, and a remote control valve (4) is installed on each tuyere dust removal outlet pipe (2).

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