Blast furnace coal injection device

Abstract

This utility model provides a blast furnace pulverized coal injection device, belonging to the technical field of smelting equipment. It includes: four coal bunkers, each with a pulverized coal pipe inserted into its bottom; a screw conveyor installed at the bottom of each of the four pulverized coal pipes; a vertical pipe inserted into each of the four screw conveyors; a pulverized coal injection pipe inserted into the bottom of each of the four vertical pipes; a connecting pipe inserted between adjacent pulverized coal injection pipes; and a mounting frame fixedly installed on the outer side of each of the four pulverized coal injection pipes. A blower is fixedly installed inside the mounting frame. Through the cooperation of multiple connecting pipes, the inner cavities of the multiple pulverized coal injection pipes can be connected through each other. This allows the pulverized coal blown by the other three pulverized coal injection devices to enter the faulty device and continue the pulverized coal injection operation, avoiding the problem of pulverized coal injection stopping after a single pulverized coal injection device malfunctions.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and in particular to a blast furnace pulverized coal injection device. Background Technology

[0002] A blast furnace uses steel plates as its outer shell, lined with refractory bricks. The blast furnace body is divided into five parts from top to bottom: the throat, the body, the waist, the belly, and the hearth.

[0003] Pulverized coal injection in blast furnaces involves directly injecting finely ground anthracite pulverized coal, bituminous coal, or a mixture of both into the blast furnace through the tuyeres. This replaces coke in providing heat and acting as a reducing agent, thereby reducing the coke ratio and lowering the cost of pig iron.

[0004] There are currently four pulverized coal injection systems for blast furnaces, with one blast furnace provided for each system. If a pulverized coal injection system malfunctions, it will affect the amount of pulverized coal injected into the corresponding blast furnace, or even stop the injection altogether. This will cause pulverized coal to accumulate in the pipes or equipment. Once it mixes with air and reaches a critical concentration, it will explode directly when exposed to high temperatures or open flames. Safety performance cannot be guaranteed, and it will cause serious economic losses. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the above-mentioned background technology and to propose a blast furnace pulverized coal injection device.

[0006] The technical problem to be solved by this utility model is to provide a blast furnace pulverized coal injection device to solve the problem that existing devices may stop pulverized coal injection.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A blast furnace pulverized coal injection device includes: four coal bunkers, each with a pulverized coal pipe inserted into its bottom, a screw conveyor installed at the bottom of each of the four pulverized coal pipes, a vertical pipe inserted into each of the four screw conveyors, a pulverized coal injection pipe inserted into the bottom of each of the four vertical pipes, a connecting pipe inserted between adjacent pulverized coal injection pipes, and an installation frame fixedly installed on the outer side of each of the four pulverized coal injection pipes. A blower is fixedly installed inside the installation frame, and a filter assembly is provided on the outer side of the installation frame. A fixing frame is fixedly installed on the outer wall of each coal bunker, and multiple support frames are fixedly installed at the bottom of the fixing frame. A fixing base is fixedly installed at the bottom of the multiple support frames.

[0009] Preferably, the filter assembly includes a filter frame, which is attached to the outer wall of the mounting frame, and a filter screen is fixedly installed in the inner cavity of the filter frame.

[0010] Preferably, the filter frame has four threaded posts connected through it, and the outer wall of the mounting frame has four threaded holes, with the threaded posts threaded into the inner cavities of the corresponding threaded holes.

[0011] Preferably, a force-bearing column is fixedly installed at the outer end of the threaded column, and multiple evenly distributed anti-slip patterns are formed on the outer wall of the force-bearing column.

[0012] Preferably, a vibrating screen is installed inside the coal bunker.

[0013] Preferably, a vertical frame is fixedly installed on the top of the fixed base, and the top of the vertical frame is fixedly connected to the bottom of the screw conveyor.

[0014] Preferably, the bottom of the fixing frame is provided with multiple horizontal plates, and the multiple horizontal plates are respectively fixedly installed between two adjacent support frames.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects:

[0016] In the above scheme, the inner cavities of multiple pulverized coal injection pipes can be connected through the cooperation of multiple connecting pipes. When a single pulverized coal injection device fails, the pulverized coal blown out by the other three pulverized coal injection devices can enter the failed device and continue to inject pulverized coal in its place, thus avoiding the problem of stopping pulverized coal injection operation after the pulverized coal injection device fails.

[0017] In the above solution, the air entering the pulverized coal injection pipe can be filtered by the filter components, preventing external debris from entering the inside of the pulverized coal injection blower and causing debris to get stuck inside the blower. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0019] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the connecting pipe of this utility model;

[0021] Figure 3 This is a schematic cross-sectional view of the connecting pipe of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the pulverized coal injection pipe of this utility model;

[0023] Figure 5 This is an exploded view of the filter assembly of this utility model.

[0024] [Figure Labels]

[0025] 1. Coal bunker; 2. Vibrating screen; 3. Fixed frame; 4. Support frame; 5. Fixed base; 6. Coal powder pipe; 7. Screw conveyor; 8. Vertical frame; 9. Vertical pipe; 10. Coal injection pipe; 11. Connecting pipe; 12. Mounting frame; 13. Air blower; 14. Filter assembly; 141. Threaded hole; 142. Filter frame; 143. Filter screen; 144. Threaded column; 145. Load-bearing column; 146. Anti-slip texture; 15. Horizontal plate.

[0026] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0027] 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.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The blast furnace pulverized coal injection device shown in this embodiment includes: four coal bunkers 1, each with a pulverized coal pipe 6 inserted into its bottom, a screw conveyor 7 inserted into its bottom, a vertical pipe 9 inserted into each screw conveyor 7, a pulverized coal injection pipe 10 inserted into its bottom, a connecting pipe 11 inserted between adjacent pulverized coal injection pipes 10, and an installation frame 12 fixedly installed on the outside of each of the four pulverized coal injection pipes 10. A blower 13 is fixedly installed inside the installation frame 12, and a filter assembly 14 is provided on the outside of the installation frame 12. A fixing frame 3 is fixedly installed on the outer wall of the coal bunkers 1, and multiple support frames 4 are fixedly installed at the bottom of the fixing frame 3. A fixing base 5 is fixedly installed at the bottom of the multiple support frames 4.

[0030] When in use, the coal is first poured into the coal bunker 1, and the coal powder enters the screw conveyor 7 through the coal powder pipe 6. Then, the screw conveyor 7 sends the coal powder into the coal injection pipe 10. Finally, the blower 13 blows out a strong airflow to blow the coal powder inside the coal injection pipe 10 into the blast furnace for subsequent smelting operations.

[0031] The cooperation between the support frame 4 and the fixed frame 3 can support the coal bunker 1 and ensure the stability of the overall device.

[0032] Meanwhile, the filter assembly 14 can block and filter the blower 13 during operation, preventing external debris from entering the blower 13 and causing damage to it.

[0033] In this embodiment, as Figure 5 As shown; the filter assembly 14 includes a filter frame 142, which is attached to the outer wall of the mounting frame 12, and a filter screen 143 is fixedly installed in the inner cavity of the filter frame 142.

[0034] In use, the filter frame 142 is installed with the mounting frame 12 so that the filter screen 143 on the filter frame 142 provides a filtering effect to the pulverized coal injection pipe 10.

[0035] In this embodiment, as Figure 5 As shown; four threaded posts 144 are threadedly connected through the filter frame 142, and four threaded holes 141 are opened on the outer wall of the mounting frame 12, with the threaded posts 144 threadedly connected to the inner cavity of the corresponding threaded holes 141.

[0036] In use, the threaded post 144 on the filter frame 142 is threadedly connected to the threaded hole 141 on the mounting frame 12, so that the filter frame 142 and the mounting frame 12 are fixedly connected. When disassembling later, you only need to unscrew the threaded post 144, which is convenient to operate.

[0037] In this embodiment, as Figure 5As shown; a force-bearing column 145 is fixedly installed on the outer end of the threaded column 144, and multiple evenly distributed anti-slip patterns 146 are formed on the outer wall of the force-bearing column 145.

[0038] When in use, the force-bearing column 145 makes it convenient for staff to apply force to the threaded column 144 to disassemble components such as the filter frame 142 and the filter screen 143. In addition, the multiple anti-slip textures 146 increase the friction on the outer wall of the force-bearing column 145 to prevent slippage when applying force.

[0039] In this embodiment, as Figure 1 As shown; a vibrating screen 2 is installed inside the coal bunker 1.

[0040] In use, the vibrating screen 2 is used to screen the coal, so that the lumps in the coal bunker 1 are blocked above by the vibrating screen 2, while the coal powder and other materials can enter the blast furnace smoothly for subsequent smelting operations.

[0041] In this embodiment, as Figure 1 As shown; a vertical frame 8 is fixedly installed on the top of the fixed base 5, and the top of the vertical frame 8 is fixedly connected to the bottom of the screw conveyor 7.

[0042] In use, the multiple vertical frames 8 are used to support the bottom of the multiple screw conveyors 7, thereby improving the stability of the screw conveyors 7 during subsequent operation.

[0043] In this embodiment, as Figure 1 As shown; the bottom of the fixed frame 3 is provided with multiple horizontal plates 15, which are fixedly installed between two adjacent support frames 4.

[0044] When in use, multiple horizontal plates 15 are combined to form a ladder, which makes it convenient for subsequent workers to climb to a higher position to remove the lumps screened out inside the coal bunker 1, and at the same time facilitate the addition of coal.

[0045] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0046] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pulverized coal injection device for a blast furnace, characterized by comprising: include: Four coal bunkers (1), each of the four coal bunkers (1) is equipped with a coal powder pipe (6) inserted at the bottom, each of the four coal powder pipes (6) is equipped with a screw conveyor device (7) inserted at the bottom, each of the four screw conveyors (7) is equipped with a vertical pipe (9) inserted at the top, each of the four vertical pipes (9) is equipped with a coal injection pipe (10) inserted at the bottom, and a connecting pipe (11) is inserted between two adjacent coal injection pipes (10). Each of the four coal injection pipes (10) is equipped with a mounting frame (12) fixedly installed on the outside, and a blower (13) is fixedly installed inside the mounting frame (12). A filter assembly (14) is provided on the outside of the mounting frame (12). A fixing frame (3) is fixedly installed on the outer wall of the coal bunker (1). Multiple support frames (4) are fixedly installed at the bottom of the fixing frame (3). A fixing base (5) is fixedly installed at the bottom of the multiple support frames (4).

2. A pulverized coal injection device for a blast furnace according to claim 1, characterized by: The filter assembly (14) includes a filter frame (142), which is attached to the outer wall of the mounting frame (12), and a filter screen (143) is fixedly installed in the inner cavity of the filter frame (142).

3. A pulverized coal injection device for a blast furnace according to claim 2, characterized in that: The filter frame (142) has four threaded posts (144) threaded through it, and the mounting frame (12) has four threaded holes (141) on its outer wall. The threaded posts (144) are threaded into the inner cavity of the corresponding threaded holes (141).

4. A pulverized coal injection device for a blast furnace according to claim 3, characterized in that: A force-bearing column (145) is fixedly installed at the outer end of the threaded column (144), and a plurality of uniformly distributed anti-slip patterns (146) are formed on the outer wall of the force-bearing column (145).

5. The pulverized coal injection device for blast furnace according to claim 1, characterized in that: The inner cavity of the coal bunker (1) is equipped with a vibrating screen (2).

6. The pulverized coal injection device for blast furnace according to claim 1, characterized in that: The top of the fixed base (5) is fixedly installed with a vertical frame (8), and the top of the vertical frame (8) is fixedly connected to the bottom of the screw conveyor (7).

7. The pulverized coal injection device for blast furnace according to claim 1, characterized in that: The bottom of the fixed frame (3) is provided with multiple horizontal plates (15), and the multiple horizontal plates (15) are respectively fixedly installed between two adjacent support frames (4).

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