Blast furnace coal injection device

Abstract

The utility model relates to the technical field of blast furnaces, in particular to a blast furnace coal injection device which comprises a furnace body, a coal storage tank is fixedly connected to the top of one side wall of the furnace body, and a coal adding assembly is arranged on the side, away from the furnace body, of the top of the coal storage tank. A connecting support with the bottom end fixedly connected with the top wall of the coal storage tank is arranged on the side, close to the furnace body, of the coal adding assembly, a protection box is fixedly connected to the end, away from the coal storage tank, of the connecting support, a material conveying pump is arranged in an inner cavity of the protection box, and a material conveying assembly is arranged on the material conveying pump; a coal injection pipe is arranged in the center of the top wall of the inner cavity of the furnace body, the bottom end of the coal injection pipe is fixedly connected with a coal injection assembly, the coal injection quantity can be adjusted, and therefore the requirement for controlling the coal injection quantity can be met when the coal injection quantity needs to be controlled, and limitation cannot be generated in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnaces, in particular to a blast furnace coal injection device. Background Art

[0002] The blast furnace is one of the most important equipment in the steel industry. It is used to reduce iron ore into iron. The structure of the blast furnace consists of a furnace hearth, a furnace body, a furnace throat and a tuyere. The production process of the blast furnace is to put iron ore, coke and limestone into the furnace hearth in a certain proportion, and then introduce hot air and reducing gas through the tuyere to make the temperature in the furnace reach above 1500 degrees Celsius, and the iron ore is reduced to iron. The iron produced by the blast furnace usually contains more carbon and other impurities, and needs further processing to become steel. The production efficiency and quality of the blast furnace are affected by many factors, such as the quality of the charge, the quality and quantity of hot air and reducing gas, the temperature and pressure in the furnace, etc. Therefore, the production of the blast furnace requires strict control of various parameters to ensure the quality and efficiency of the iron produced. In addition to the steel industry, blast furnaces are also used in other industrial fields, such as the non-ferrous metal industry, the chemical industry, etc. The emergence and development of blast furnaces have greatly promoted the progress of industry and the development of society.

[0003] Coal injection is an important process in the blast furnace production process, so a coal injection device is needed. Although the traditional coal injection device has a certain slag flushing ability, it still has some shortcomings. For example, it is difficult to adjust the coal injection amount. Therefore, it is difficult to meet the need to control the coal injection amount, which will cause certain limitations in use. Therefore, a blast furnace coal injection device is proposed to address the above problems. Utility Model Content

[0004] The utility model aims to provide a blast furnace coal injection device, which can adjust the coal injection amount, so that the coal injection amount can be controlled when it is needed, so that there will be no limitations in use, so as to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A blast furnace coal injection device comprises a furnace body, a coal storage tank is fixedly connected to the top of one side wall of the furnace body, a coal adding assembly is provided on the top of the coal storage tank away from the furnace body, a connecting bracket is provided on the side of the coal adding assembly close to the furnace body, a protective box is fixedly connected to the end of the connecting bracket away from the coal storage tank, a feed pump is provided in the inner cavity of the protective box and a feed assembly is provided on the feed pump, a coal injection pipe is provided at the center of the top wall of the inner cavity of the furnace body, and the coal injection assembly is fixedly connected to the bottom end of the coal injection pipe.

[0007] Preferably, the coal filling assembly includes a coal filling hopper, the bottom end of which passes through the top wall of the coal storage tank and is connected to the inner cavity of the coal storage tank, the top of the coal filling hopper is hinged with a hopper cover through a hinge shaft, and an opening and closing handle is fixedly connected to the center of the top wall of the hopper cover.

[0008] Preferably, the feed assembly includes a coal extraction pipe connected to the input end of the feed pump and a coal guide pipe connected to the output end of the feed pump, one end of the coal extraction pipe away from the feed pump passes through the top wall of the coal storage tank and extends to the bottom of the inner cavity of the coal storage tank, and one end of the coal guide pipe away from the feed pump passes through the top wall of the furnace body and is connected to the coal injection pipe.

[0009] Preferably, the coal injection assembly includes a coal injection gun connected to the bottom end of the coal injection pipe, the bottom of the coal injection gun is fixedly connected and connected to a coal injection cylinder with a hollow interior, a coal injection disk is provided at the bottom of the inner cavity of the coal injection cylinder, and the bottom of the coal injection cylinder is rotatably connected to an adjusting baffle.

[0010] Preferably, a plurality of first coal injection through holes are penetrated and arranged at equal intervals on the coal injection disk, and second coal injection through holes are penetrated and arranged at equal intervals on the adjustment baffle, which are equal in number, corresponding in position and matching in specification to the first coal injection through holes.

[0011] Preferably, a spacer is provided in the inner cavity of the coal injection cylinder, a micro motor is fixedly connected to the inner cavity of the spacer, a transmission shaft is fixedly connected to the output end of the micro motor, and the bottom end of the transmission shaft passes through the coal injection disk and is fixedly connected to the center of the adjustment baffle.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, coal powder can be stored by the provided coal storage tank, coal powder can be added to the coal storage tank by the provided coal adding assembly, the stored coal powder can be guided to the coal injection pipe by the provided feed pump and feed assembly, the coal powder can be guided into the coal injection gun by the provided coal injection pipe and finally sprayed out by the coal injection assembly, and the provided coal injection assembly can not only perform coal injection, but also adjust the coal injection amount, so that the need to control the coal injection amount can be met, thereby causing no limitations in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the coal injection tube of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the coal injection plate and the regulating baffle plate of the utility model;

[0018] Figure 5 It is a schematic diagram of the exploded structure of the coal injection plate and the regulating baffle plate of the utility model.

[0019] In the figure: 1. furnace body; 2. coal storage tank; 3. coal feeding hopper; 4. protective box; 5. feed pump; 6. coal extraction pipe; 7. coal guide pipe; 8. coal injection pipe; 9. coal injection gun; 10. coal injection barrel; 11. coal injection plate; 12. adjustment baffle; 13. first coal injection through hole; 14. second coal injection through hole; 15. spacer; 16. micro motor; 17. transmission shaft. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0023] See also Figure 1-5 , the utility model provides a technical solution:

[0024] A blast furnace coal injection device comprises a furnace body 1, a coal storage tank 2 is fixedly connected to the top of one side wall of the furnace body 1, a coal adding assembly is provided on the top of the coal storage tank 2 away from the furnace body 1, a connecting bracket is provided on the side of the coal adding assembly close to the furnace body 1, and a protective box 4 is fixedly connected to the end of the connecting bracket away from the coal storage tank 2, a feed pump 5 is provided in the inner cavity of the protective box 4 and a feed pump 5 is provided on the feed pump 5, a coal injection pipe 8 is provided at the center of the top wall of the inner cavity of the furnace body 1, and the bottom end of the coal injection pipe 8 is fixedly connected to the coal injection assembly.

[0025] The coal-filling assembly includes a coal-filling hopper 3, the bottom end of which passes through the top wall of the coal storage tank 2 and is connected to the inner cavity of the coal storage tank 2. The top of the coal-filling hopper 3 is hinged with a hopper cover through a hinged shaft, and an opening and closing handle is fixedly connected to the center of the top wall of the hopper cover. The coal-filling assembly can add coal powder into the coal storage tank 2; the feeding assembly includes a coal extraction pipe 6 connected to the input end of the feeding pump 5 and a coal guide pipe 7 connected to the output end of the feeding pump 5, the end of the coal extraction pipe 6 away from the feeding pump 5 passes through the top wall of the coal storage tank 2 and extends to the bottom of the inner cavity of the coal storage tank 2, the end of the coal guide pipe 7 away from the feeding pump 5 passes through the top wall of the furnace body 1 and is connected to the coal injection pipe 8, and the feeding pump 5 and the feeding assembly can guide the stored coal powder into the coal injection pipe 8; the coal injection assembly includes a coal injection gun 9 connected to the bottom end of the coal injection pipe 8, and the bottom of the coal injection gun 9 is fixedly connected and connected to the coal injection gun having an internal hollow arrangement The coal injection cylinder 10 is provided with a coal injection disk 11 at the bottom of the inner cavity of the coal injection cylinder 10, and an adjusting baffle 12 is rotatably connected to the bottom of the coal injection cylinder 10. A plurality of first coal injection through holes 13 are penetrated and arranged at equal intervals on the coal injection disk 11, and second coal injection through holes 14 of equal number, corresponding position and matching specifications as the first coal injection through holes 13 are penetrated and arranged at equal intervals on the adjusting baffle 12. A partition block 15 is provided in the inner cavity of the coal injection cylinder 10, and a micro motor 16 is fixedly connected to the inner cavity of the partition block 15. A transmission shaft 17 is fixedly connected to the output end of the micro motor 16, and the bottom end of the transmission shaft 17 penetrates the coal injection disk 11 and is fixedly connected to the center of the adjusting baffle 12. The coal injection assembly can not only perform coal injection, but also adjust the amount of coal injection. Therefore, when the coal injection amount needs to be controlled, it can be met, so that there will be no limitations in use.

[0026] Working process: first, the bucket cover is turned to open by the opening and closing handle, and the coal powder is introduced into the coal storage tank 2 through the coal filling bucket 3, and then the feeding pump 5 is started. The feeding pump 5 can pump the coal powder into the coal guide pipe 7 through the coal extraction pipe 6, enter the coal injection pipe 8 and finally enter the coal injection gun 9. The coal powder in the coal injection gun 9 enters the coal injection cylinder 10, and finally is sprayed out through the first coal injection through hole 13 on the coal injection plate 11 and the second coal injection through hole 14 on the adjustment baffle plate 12. When it is necessary to reduce the amount of coal injection, the micro motor 16 is started, and the micro motor 16 will pass The transmission shaft 17 drives the adjusting baffle plate 12 to rotate, so that the second coal injection through hole 14 on the adjusting baffle plate 12 is staggered with the first coal injection through hole 13 on the coal injection disc 11. At this time, part of the first coal injection through hole 13 will be blocked by the adjusting baffle plate 12, so as to achieve the purpose of reducing the coal injection amount. The appropriate coal injection amount is adjusted according to the degree of staggering between the second coal injection through hole 14 on the adjusting baffle plate 12 and the first coal injection through hole 13 on the coal injection disc 11. Therefore, when the coal injection amount needs to be controlled, it can be satisfied, so that there will be no limitations in use.

[0027] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace coal injection device, comprising a furnace body (1), characterized in that: A coal storage tank (2) is fixedly connected to the top of one side wall of the furnace body (1); a coal filling assembly is provided on the top of the coal storage tank (2) away from the furnace body (1); a connecting bracket is provided on the side of the coal filling assembly close to the furnace body (1) and the bottom end of the connecting bracket is fixedly connected to the top wall of the coal storage tank (2); a protection box (4) is fixedly connected to the end of the connecting bracket away from the coal storage tank (2); a feed pump (5) is provided in the inner cavity of the protection box (4) and a feed pump (5) is provided on the feed pump (5); a coal injection pipe (8) is provided at the center of the top wall of the inner cavity of the furnace body (1); and the bottom end of the coal injection pipe (8) is fixedly connected to the coal injection assembly.

2. A blast furnace coal injection device according to claim 1, characterized in that: The coal filling assembly comprises a coal filling hopper (3), the bottom end of which passes through the top wall of the coal storage tank (2) and is connected to the inner cavity of the coal storage tank (2), the top of the coal filling hopper (3) is hinged with a hopper cover via a hinge shaft, and an opening and closing handle is fixedly connected to the center of the top wall of the hopper cover.

3. A blast furnace coal injection device according to claim 1, characterized in that: The feed assembly comprises a coal extraction pipe (6) connected to the input end of the feed pump (5) and a coal guide pipe (7) connected to the output end of the feed pump (5); one end of the coal extraction pipe (6) away from the feed pump (5) passes through the top wall of the coal storage tank (2) and extends to the bottom of the inner cavity of the coal storage tank (2); one end of the coal guide pipe (7) away from the feed pump (5) passes through the top wall of the furnace body (1) and is connected to the coal injection pipe (8).

4. A blast furnace coal injection device according to claim 1, characterized in that: The coal injection assembly comprises a coal injection gun (9) connected to the bottom end of the coal injection pipe (8); the bottom of the coal injection gun (9) is fixedly connected to and connected to a coal injection cylinder (10) which is hollow inside; a coal injection disk (11) is provided at the bottom of the inner cavity of the coal injection cylinder (10); and an adjusting baffle (12) is rotatably connected to the bottom of the coal injection cylinder (10).

5. A blast furnace coal injection device according to claim 4, characterized in that: The coal injection plate (11) is penetrated by a plurality of first coal injection through holes (13) which are arranged at equal intervals, and the adjustment baffle plate (12) is penetrated by a plurality of second coal injection through holes (14) which are equal in number, corresponding in position and matching in specification to the first coal injection through holes (13) and arranged at equal intervals.

6. A blast furnace coal injection device according to claim 4, characterized in that: The inner cavity of the coal injection cylinder (10) is provided with a partition block (15), the inner cavity of the partition block (15) is fixedly connected to a micro motor (16), the output end of the micro motor (16) is fixedly connected to a transmission shaft (17), the bottom end of the transmission shaft (17) passes through the coal injection disc (11) and is fixedly connected to the center of the adjustment baffle (12).

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