Blast furnace ironmaking pulverized coal distribution device

Abstract

The utility model discloses a blast furnace ironmaking pulverized coal distribution device, and relates to the technical field of iron and steel smelting. The device comprises a mounting shell, a baffle is fixedly connected to the middle of the inner wall of the mounting shell, a pulverized coal circulation assembly used for conveying pulverized coal is vertically arranged on the surface of the mounting shell in a penetrating mode, two mounting frames are fixedly connected to the inner wall of the mounting shell, and the two mounting frames are located on the left side and the right side of the baffle respectively. A filter screen is embedded in the inner wall of the mounting frame, a reverse blowing cleaning assembly and a slag powder cleaning assembly which are used for cleaning the filter screen are arranged on the surface of the mounting shell, the pulverized coal circulation assembly comprises a Y-shaped three-way pipe, and two pipelines at the lower end of the Y-shaped three-way pipe communicate with the left side and the right side of a baffle correspondingly; the coal injection nozzle is convenient to use, the effect of effectively protecting the coal injection nozzle in use is achieved, large-particle coal slag in pulverized coal can be filtered, the coal slag is prevented from blocking the nozzle, and therefore it is guaranteed that coal injection work is conducted smoothly.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel smelting technology, specifically to a pulverized coal distribution device for blast furnace ironmaking. Background Technology

[0002] In blast furnace ironmaking, pulverized coal injection serves as an important auxiliary fuel, effectively improving ironmaking production efficiency and energy conservation. Existing pulverized coal distribution devices for blast furnace ironmaking mainly consist of a pulverized coal conveying system, pulverized coal injection nozzles, and a control system. Their core function is to precisely inject pulverized coal into the blast furnace to achieve effective combustion and heat release.

[0003] The small diameter of the pulverized coal nozzle, limited by the pulverized coal grinding equipment, results in a certain deviation in the diameter of the pulverized coal, which makes the pulverized coal nozzle prone to clogging. Traditional pulverized coal injection systems require complex unblocking operations after clogging, which not only affects production efficiency but also poses safety hazards.

[0004] Therefore, a pulverized coal distribution device for blast furnace ironmaking is proposed. Summary of the Invention

[0005] The purpose of this utility model is to provide a pulverized coal distribution device for blast furnace ironmaking in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A pulverized coal distribution device for blast furnace ironmaking includes a mounting shell. A baffle is fixedly connected to the middle of the inner wall of the mounting shell. A pulverized coal flow component for conveying pulverized coal is vertically arranged through the surface of the mounting shell. Two mounting frames are fixedly connected to the inner wall of the mounting shell, and the two mounting frames are respectively located on the left and right sides of the baffle. A filter screen is embedded in the inner wall of the mounting frame. A backflushing cleaning component and a slag powder cleaning component for cleaning the filter screen are provided on the surface of the mounting shell.

[0008] Furthermore, the pulverized coal flow assembly includes a Y-shaped tee pipe and a pulverized coal nozzle. The two lower ends of the Y-shaped tee pipe are respectively connected to the left and right sides of the baffle. Solenoid valves are provided on the surfaces of the two lower ends of the Y-shaped tee pipe. A guide pipe is fixedly connected to the bottom of the mounting shell, and the guide pipe is connected to the inside of the mounting shell.

[0009] Furthermore, the backflush cleaning assembly includes an air inlet pipe, which is fixedly connected to the side of the mounting housing. One end of the air inlet pipe is fixedly connected to an installation pipe, which is fixedly connected to the bottom surface of the mounting frame. A pulse nozzle is fixedly installed on the surface of the installation pipe, and the pulse nozzle is inclined upward. The other end of the air inlet pipe is fixedly connected to the air outlet of the air compressor.

[0010] Furthermore, the slag powder cleaning assembly includes a conveying pipe, which is fixedly connected to the back of the mounting housing. One end of the conveying pipe is fixedly connected to a collection cover, and the other end of the conveying pipe is connected to the suction end of an industrial vacuum cleaner.

[0011] Furthermore, the number of pulverized coal nozzles is multiple, and the multiple pulverized coal nozzles are distributed in a ring array.

[0012] Furthermore, the two solenoid valves operate in opposite states.

[0013] The beneficial effects of this utility model are as follows:

[0014] The pulverized coal flow assembly is connected to the pulverized coal conveying pipeline and introduces pulverized coal into the blast furnace. The assembly controls the pulverized coal to flow only from one side of the baffle. A filter screen filters and intercepts large particles of coal slag in the pulverized coal, preventing clogging. After a period of operation, the assembly controls the pulverized coal to flow from the other side of the baffle. At this time, a backflushing cleaning assembly backflushes the recently used filter screen to prevent slag from clogging the screen's mesh. A slag cleaning assembly then cleans any remaining slag from the filter screen's surface. The pulverized coal flow assembly then switches the pulverized coal flow path again, allowing for continuous pulverized coal injection. This system effectively protects the pulverized coal injection nozzles, filters large particles of coal slag, and prevents clogging, thus ensuring smooth pulverized coal injection. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the backflushing cleaning component structure of this utility model;

[0018] Figure 4 This is a side sectional view of the structure of this utility model;

[0019] Reference numerals: 1. Mounting housing; 2. Baffle; 3. Pulverized coal flow assembly; 301. Y-shaped tee pipe; 302. Solenoid valve; 303. Guide pipe; 304. Pulverized coal nozzle; 4. Mounting frame; 5. Filter screen; 6. Backflush cleaning assembly; 601. Air inlet pipe; 602. Mounting pipe; 603. Pulse nozzle; 7. Slag powder cleaning assembly; 701. Conveying pipe; 702. Collection cover. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] like Figures 1 to 4As shown, a blast furnace ironmaking pulverized coal distribution device includes a mounting shell 1, a baffle 2 fixedly connected to the middle of the inner wall of the mounting shell 1, a pulverized coal flow component 3 for conveying pulverized coal vertically through the surface of the mounting shell 1, two mounting frames 4 fixedly connected to the inner wall of the mounting shell 1, and the two mounting frames 4 are located on the left and right sides of the baffle 2 respectively. A filter screen 5 is embedded in the inner wall of the mounting frame 4, and a backflushing cleaning component 6 and a slag powder cleaning component 7 for cleaning the filter screen 5 are provided on the surface of the mounting shell 1. More specifically, the pulverized coal flow component 3 is connected to the pulverized coal conveying pipeline and introduces pulverized coal into the blast furnace. The pulverized coal flow component 3 controls the pulverized coal to flow only from one side of the baffle 2. The filter screen 5 can filter and intercept large particles of coal slag in the pulverized coal, preventing the coal slag from clogging the pulverized coal flow component 3. After running for a period of time, the pulverized coal flow component 3 controls the pulverized coal to flow from the other side of the baffle 2. At this time, the back-blowing cleaning component 6 back-blowing the filter screen 5 that has just been used prevents the coal slag from clogging the mesh of the filter screen 5. The slag cleaning component 7 then cleans the coal slag remaining on the surface of the filter screen 5. Subsequently, the pulverized coal flow path can be switched again by the pulverized coal flow component 3 to continuously inject pulverized coal.

[0026] The pulverized coal flow assembly 3 includes a Y-shaped tee pipe 301 and a pulverized coal nozzle 304. The two lower pipes of the Y-shaped tee pipe 301 are connected to the left and right sides of the baffle 2, respectively. Solenoid valves 302 are installed on the surfaces of the two lower pipes of the Y-shaped tee pipe 301. A guide pipe 303 is fixedly connected to the bottom of the mounting housing 1 and is connected to the interior of the mounting housing 1. It should be noted that the upper end of the Y-shaped tee pipe 301 is connected to the pulverized coal conveying pipeline. The pulverized coal is opened by the solenoid valve 302 on one side, allowing it to enter the mounting housing 1 from that side. The pulverized coal is then conveyed through the guide pipe 303 and finally sprayed into the blast furnace through the pulverized coal nozzle 304.

[0027] The backflushing cleaning assembly 6 includes an air inlet pipe 601, which is fixedly connected to the side of the mounting housing 1. One end of the air inlet pipe 601 is fixedly connected to an mounting pipe 602, which is fixedly connected to the bottom surface of the mounting frame 4. A pulse nozzle 603 is fixedly mounted on the surface of the mounting pipe 602, and the pulse nozzle 603 is inclined upward. The other end of the air inlet pipe 601 is fixedly connected to the air outlet of the air compressor. More specifically, the air compressor outputs a high-speed airflow into the air inlet pipe 601. The airflow flows through the mounting pipe 602 and is output outward through the pulse nozzle 603. The pulsed airflow blows the filter screen 5 from bottom to top, cleaning the coal slag blocked in the mesh of the filter screen 5 and preventing the filter screen 5 from becoming clogged.

[0028] The slag cleaning assembly 7 includes a conveying pipe 701, which is fixedly connected to the back of the mounting housing 1. One end of the conveying pipe 701 is fixedly connected to a collection hood 702, and the other end of the conveying pipe 701 is connected to the suction end of an industrial vacuum cleaner. It should be noted that the industrial vacuum cleaner generates suction to draw large slag particles above the filter screen 5 into the collection hood 702, and then sends the slag into the vacuum cleaner through the conveying pipe 701, thus cleaning the inside of the mounting housing 1.

[0029] There are multiple pulverized coal nozzles 304, and these multiple pulverized coal nozzles 304 are arranged in a ring array. More specifically, by arranging multiple pulverized coal nozzles 304 in an array, the pulverized coal is injected more evenly, thereby improving the subsequent combustion efficiency.

[0030] The two solenoid valves 302 operate in opposite states. It should be noted that when one solenoid valve 302 is open, the other solenoid valve 302 is closed, thus ensuring that pulverized coal is conveyed only from one side of the baffle 2, which facilitates cleaning of the filter screen 5 on the other side when conveying pulverized coal.

[0031] In summary: The pulverized coal flow component 3 is connected to the pulverized coal conveying pipeline and introduces pulverized coal into the blast furnace. The pulverized coal flow component 3 controls the pulverized coal to flow only from one side of the baffle 2. The filter screen 5 can filter and intercept large particles of coal slag in the pulverized coal, preventing the coal slag from clogging the pulverized coal flow component 3. After a period of operation, the pulverized coal flow component 3 controls the pulverized coal to flow from the other side of the baffle 2. At this time, the back-flushing cleaning component 6 back-flushes the filter screen 5 that has just been used to prevent coal slag from clogging the mesh of the filter screen 5. The slag cleaning component 7 then cleans the coal slag remaining on the surface of the filter screen 5. Subsequently, the pulverized coal flow component 3 continues to switch the pulverized coal flow path, allowing for continuous pulverized coal injection. In use, this achieves the effect of effectively protecting the pulverized coal injection nozzle, filtering out large particles of coal slag in the pulverized coal, preventing the coal slag from clogging the nozzle, and thus ensuring the smooth operation of pulverized coal injection.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pulverized coal distribution device for blast furnace ironmaking, characterized in that, The device includes a mounting shell (1), a baffle (2) is fixedly connected to the middle of the inner wall of the mounting shell (1), a coal powder flow assembly (3) for conveying coal powder is vertically arranged through the surface of the mounting shell (1), a mounting frame (4) is fixedly connected to the inner wall of the mounting shell (1), there are two mounting frames (4), and the two mounting frames (4) are located on the left and right sides of the baffle (2) respectively. A filter screen (5) is embedded in the inner wall of the mounting frame (4), and a backflushing cleaning assembly (6) and a slag powder cleaning assembly (7) for cleaning the filter screen (5) are provided on the surface of the mounting shell (1).

2. The pulverized coal distribution device for blast furnace ironmaking according to claim 1, characterized in that, The pulverized coal flow assembly (3) includes a Y-shaped three-way pipe (301) and a pulverized coal nozzle (304). The two lower ends of the Y-shaped three-way pipe (301) are connected to the left and right sides of the baffle (2) respectively. Solenoid valves (302) are provided on the surfaces of the two lower ends of the Y-shaped three-way pipe (301). A guide pipe (303) is fixedly connected to the bottom of the mounting shell (1), and the guide pipe (303) is connected to the inside of the mounting shell (1).

3. The pulverized coal distribution device for blast furnace ironmaking according to claim 1, characterized in that, The backflush cleaning assembly (6) includes an air inlet pipe (601), which is fixedly connected to the side of the mounting housing (1). One end of the air inlet pipe (601) is fixedly connected to an installation pipe (602), which is fixedly connected to the bottom surface of the mounting frame (4). A pulse nozzle (603) is fixedly installed on the surface of the installation pipe (602). The pulse nozzle (603) is inclined upward. The other end of the air inlet pipe (601) is fixedly connected to the air outlet of the air compressor.

4. The pulverized coal distribution device for blast furnace ironmaking according to claim 3, characterized in that, The slag powder cleaning component (7) includes a conveying pipe (701), and the conveying pipe (701) is fixedly connected to the back of the mounting shell (1). One end of the conveying pipe (701) is fixedly connected to a collection cover (702), and the other end of the conveying pipe (701) is connected to the suction end of an industrial vacuum cleaner.

5. A blast furnace pulverized coal distribution device according to claim 2, characterized in that, The number of the pulverized coal nozzles (304) is multiple, and the multiple pulverized coal nozzles (304) are distributed in a ring array.

6. A blast furnace pulverized coal distribution device according to claim 2, characterized in that, The two solenoid valves (302) operate in opposite states.

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