Full-contact bottom coal injection device

Abstract

The utility model discloses a full contact bottom coal injection device which comprises a blast furnace, an annular shell is fixedly connected to the lower position of the surface of the blast furnace, a coal distribution pipe is fixedly connected to the outer surface of the annular shell, the front side of the coal distribution pipe is communicated with a coal conveying pipe, and the inner surface of the coal distribution pipe is movably connected with a coal injection pipe through a bearing. The number of the coal injection pipes is eight, the inner sides of the coal injection pipes penetrate through the annular shell and extend to the inner surface of the blast furnace, sliding sleeves are movably connected to the positions, close to the blast furnace, of the surfaces of the coal injection pipes, and the outer surfaces of the sliding sleeves are fixedly connected with the inner wall of the blast furnace. Firstly, the reversible motor is started, the output end of the reversible motor drives the coal injection pipe to rotate forwards and backwards in a reciprocating mode, the nozzle of the coal injection pipe swings forwards and backwards in a reciprocating mode, at the moment, pulverized coal swings continuously to be sprayed out, the area of the pulverized coal which is scattered is increased, and therefore the effect that the pulverized coal can make full contact with flames is achieved.

Description

Technical Field

[0001] This utility model relates to the field of pulverized coal injection technology for blast furnaces, specifically a bottom pulverized coal injection device that ensures full contact. Background Technology

[0002] Blast furnace pulverized coal injection, also known as pulverized coal injection, is a key component of modern ironmaking processes. Pulverized coal can partially replace expensive and scarce metallurgical coke, significantly reducing pig iron production costs. With reduced coke demand, some older coke ovens can be shut down and abandoned, saving on maintenance or new construction costs for coking facilities. Lowering coke production can indirectly reduce environmental pollution during the coking process. In summary, blast furnace pulverized coal injection technology achieves the comprehensive goals of "coke saving, increased production, environmental protection, and process optimization" through multi-dimensional synergistic effects.

[0003] In the process of steelmaking in a blast furnace, pulverized coal needs to be injected into the bottom of the blast furnace for combustion. Traditional bottom pulverized coal injection devices have a simple structure and a small injection area, which cannot increase the injection area, resulting in insufficient contact between pulverized coal and flame, thus leading to incomplete combustion of pulverized coal.

[0004] Therefore, the bottom pulverized coal injection device needs to be redesigned to ensure that the pulverized coal and the flame can make full contact. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a bottom pulverized coal injection device with sufficient contact, which has the advantage of sufficient contact and solves the problem that traditional bottom pulverized coal injection devices have simple structures, small pulverized coal injection areas, and cannot increase the pulverized coal injection area, resulting in insufficient contact between pulverized coal and flame, and thus incomplete combustion of pulverized coal.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a bottom pulverized coal injection device with full contact, comprising a blast furnace, an annular outer shell fixedly connected to the lower part of the blast furnace surface, a coal distribution pipe fixedly connected to the outer surface of the annular outer shell, a coal conveying pipe connected to the front side of the coal distribution pipe, and pulverized coal injection pipes movably connected to the inner surface of the coal distribution pipe via bearings, the number of pulverized coal injection pipes being eight, the inner side of the pulverized coal injection pipes penetrating the annular outer shell and extending to the inner surface of the blast furnace, a sliding sleeve movably connected to the surface of the pulverized coal injection pipes near the blast furnace, the outer surface of the sliding sleeve being in contact with the blast furnace surface. The inner wall of the pulverized coal injection pipe is fixedly connected to a helical gear, which is fixedly connected to the surface of the pulverized coal injection pipe and located inside the annular shell. The top of the helical gear meshes with a helical tooth ring, and the top of the helical tooth ring is fixedly connected to a tooth ring. The top of the tooth ring has a sliding groove, and the inner wall of the sliding groove is slidably connected to a limit slider. The top of the limit slider is fixedly connected to the top of the inner surface of the annular shell. The rear side of the tooth ring meshes with a gear, and the top of the annular shell is fixedly connected to a reversible motor. The output end of the reversible motor extends through to the top of the inner surface of the annular shell and is fixedly connected to the top of the gear.

[0007] As a preferred embodiment of this invention, baffles are fixedly connected to the surface of the pulverized coal injection pipe and to both the inner and outer sides of the sliding sleeve, and the baffles are circular in shape.

[0008] As a preferred embodiment of this invention, the bottom of the blast furnace is fixedly connected to a base, and the base is rectangular in shape.

[0009] As a preferred embodiment of this invention, a control cabinet is fixedly connected to the top of the base and to the right side of the blast furnace.

[0010] As a preferred embodiment of this invention, the control cabinet has heat dissipation holes on its right side.

[0011] As a preferred embodiment of this invention, the material of the sliding sleeve is high-temperature resistant ceramic.

[0012] As a preferred embodiment of this invention, both the coal conveying pipe and the coal distribution pipe are made of stainless steel.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model first starts the reversible motor, which drives the coal injection pipe to rotate back and forth, causing the nozzle of the coal injection pipe to swing back and forth. At this time, the coal powder can be continuously swung and sprayed out, thereby increasing the area of ​​coal powder to be scattered, so as to achieve the effect of full contact between coal powder and flame.

[0015] 2. By setting a baffle, this utility model can limit the range of motion of the pulverized coal injection pipe and prevent the pulverized coal injection pipe from detaching from the sliding sleeve during use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the blast furnace structure of this utility model;

[0017] Figure 2 This is a front sectional view of the annular shell structure of this utility model;

[0018] Figure 3 This is a top sectional view of the blast furnace structure of this utility model;

[0019] Figure 4 This is a bottom sectional view of the blast furnace structure of this utility model.

[0020] In the diagram: 1. Blast furnace; 2. Annular outer shell; 3. Coal distribution pipe; 4. Coal conveying pipe; 5. Pulverized coal injection pipe; 6. Sliding sleeve; 7. Helical gear; 8. Helical gear ring; 9. Gear ring; 10. Slide groove; 11. Limiting slider; 12. Gear; 13. Reversible motor; 14. Baffle plate; 15. Base; 16. Control cabinet; 17. Heat dissipation hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 4 As shown, this utility model provides a bottom pulverized coal injection device with full contact, including a blast furnace 1. An annular outer shell 2 is fixedly connected to the lower surface of the blast furnace 1. A coal distribution pipe 3 is fixedly connected to the outer surface of the annular outer shell 2. A coal conveying pipe 4 is connected to the front side of the coal distribution pipe 3. Eight pulverized coal injection pipes 5 are movably connected to the inner surface of the coal distribution pipe 3 via bearings. The inner side of each pulverized coal injection pipe 5 penetrates the annular outer shell 2 and extends to the inner surface of the blast furnace 1. A sliding sleeve 6 is movably connected to the surface of each pulverized coal injection pipe 5 near the blast furnace 1. The outer surface of the sliding sleeve 6 is fixedly connected to the inner wall of the blast furnace 1. A helical gear 7 is fixedly connected to the surface of the coal pipe 5 and inside the annular shell 2. A helical tooth ring 8 meshes with the top of the helical gear 7. A tooth ring 9 is fixedly connected to the top of the helical tooth ring 8. A groove 10 is opened on the top of the tooth ring 9. A limiting slider 11 is slidably connected to the inner wall of the groove 10. The top of the limiting slider 11 is fixedly connected to the top of the inner surface of the annular shell 2. A gear 12 meshes with the rear side of the tooth ring 9. A reversible motor 13 is fixedly connected to the top of the annular shell 2. The output end of the reversible motor 13 extends through to the top of the inner surface of the annular shell 2 and is fixedly connected to the top of the gear 12.

[0023] refer to Figure 2 The surface of the pulverized coal injection pipe 5 and both the inner and outer sides of the sliding sleeve 6 are fixedly connected with baffles 14, which are circular in shape.

[0024] As a technical optimization of this utility model, by setting the baffle 14, the range of motion of the coal injection pipe 5 can be restricted, preventing the coal injection pipe 5 from detaching from the sliding sleeve 6 during use.

[0025] refer to Figure 1 The bottom of blast furnace 1 is fixedly connected to a base 15, which is rectangular in shape.

[0026] As a technical optimization of this utility model, by setting the base 15, the blast furnace 1 can be supported, making the blast furnace 1 more stable.

[0027] refer to Figure 1 A control cabinet 16 is fixedly connected to the top of the base 15 and to the right side of the blast furnace 1.

[0028] As a technical optimization of this utility model, by setting up a control cabinet 16, the rotation direction of the reversible motor 13 can be automatically adjusted, which makes it more convenient for users.

[0029] refer to Figure 1 The control cabinet 16 has a heat dissipation hole 17 on its right side.

[0030] As a technical optimization of this utility model, by setting heat dissipation holes 17, the control cabinet 16 can be cooled, preventing the equipment inside the control cabinet 16 from being damaged due to high temperature.

[0031] refer to Figure 2 The material of the sliding sleeve 6 is high-temperature resistant ceramic.

[0032] As a technical optimization of this utility model, by setting the sliding sleeve 6 of high temperature resistant ceramic material, the high temperature resistance of the sliding sleeve 6 can be increased, and the sliding sleeve 6 can be prevented from being damaged due to high temperature.

[0033] refer to Figure 4 Both the coal conveying pipe 4 and the coal distribution pipe 3 are made of stainless steel.

[0034] As a technical optimization of this utility model, by setting the coal conveying pipe 4 and the coal distribution pipe 3 made of stainless steel, it is possible to prevent the coal conveying pipe 4 and the coal distribution pipe 3 from rusting and to prevent the coal conveying pipe 4 and the coal distribution pipe 3 from being damaged due to rusting.

[0035] The working principle and usage process of this utility model are as follows: In use, the reversible motor 13 is first started through the control cabinet 16, causing the output end of the reversible motor 13 to rotate back and forth. The output end of the reversible motor 13 drives the gear ring 9 to rotate back and forth, the gear ring 9 drives the helical gear ring 8 to rotate back and forth, the helical gear ring 8 drives the helical gear 7 to rotate back and forth, and the helical gear 7 drives the coal injection pipe 5 to rotate back and forth, causing the nozzle of the coal injection pipe 5 to swing back and forth. At this time, the coal powder can be continuously oscillating and sprayed out, thereby increasing the area of ​​coal powder contact and scattering, so as to achieve the effect of coal powder and flame being in full contact.

[0036] In summary, this fully contact bottom pulverized coal injection device, by incorporating a blast furnace 1, annular outer shell 2, coal distribution pipe 3, coal conveying pipe 4, pulverized coal injection pipe 5, sliding sleeve 6, helical gear 7, helical gear ring 8, gear ring 9, sliding groove 10, limiting slider 11, gear 12, and reversible motor 13, solves the problem of insufficient contact between pulverized coal and flame, resulting in incomplete combustion of pulverized coal, which is caused by the simple structure and small pulverized coal injection area of ​​traditional bottom pulverized coal injection devices.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully contact bottom pulverized coal injection device, comprising a blast furnace (1), characterized in that: An annular shell (2) is fixedly connected to the lower part of the surface of the blast furnace (1). A coal distribution pipe (3) is fixedly connected to the outer surface of the annular shell (2). A coal conveying pipe (4) is connected to the front side of the coal distribution pipe (3). A pulverized coal injection pipe (5) is movably connected to the inner surface of the coal distribution pipe (3) through a bearing. There are eight pulverized coal injection pipes (5). The inner side of the pulverized coal injection pipe (5) penetrates the annular shell (2) and extends to the inner surface of the blast furnace (1). A sliding sleeve (6) is movably connected to the surface of the pulverized coal injection pipe (5) near the blast furnace (1). The outer surface of the sliding sleeve (6) is fixedly connected to the inner wall of the blast furnace (1). The surface of the pulverized coal injection pipe (5) is located on the annular shell (2). A helical gear (7) is fixedly connected inside the ring. A helical gear ring (8) meshes with the top of the helical gear (7). A gear ring (9) is fixedly connected to the top of the helical gear ring (8). A sliding groove (10) is opened on the top of the gear ring (9). A limiting slider (11) is slidably connected to the inner wall of the sliding groove (10). The top of the limiting slider (11) is fixedly connected to the top of the inner surface of the annular shell (2). A gear (12) meshes with the rear side of the gear ring (9). A reversible motor (13) is fixedly connected to the top of the annular shell (2). The output end of the reversible motor (13) extends through to the top of the inner surface of the annular shell (2) and is fixedly connected to the top of the gear (12).

2. The bottom pulverized coal injection device with full contact according to claim 1, characterized in that: The surface of the pulverized coal injection pipe (5) and both the inner and outer sides of the sliding sleeve (6) are fixedly connected with baffles (14), and the baffles (14) are circular in shape.

3. The bottom pulverized coal injection device with full contact according to claim 1, characterized in that: The bottom of the blast furnace (1) is fixedly connected to a base (15), and the base (15) is rectangular in shape.

4. The bottom pulverized coal injection device with full contact according to claim 3, characterized in that: A control cabinet (16) is fixedly connected to the top of the base (15) and to the right side of the blast furnace (1).

5. The bottom pulverized coal injection device with full contact according to claim 4, characterized in that: The control cabinet (16) has a heat dissipation hole (17) on its right side.

6. The bottom pulverized coal injection device with full contact according to claim 1, characterized in that: The material of the sliding sleeve (6) is high-temperature resistant ceramic.

7. The bottom pulverized coal injection device with full contact according to claim 1, characterized in that: Both the coal conveying pipe (4) and the coal distribution pipe (3) are made of stainless steel.

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