Pulverized coal filter capable of effectively reducing blockage

Abstract

A pulverized coal filter capable of effectively reducing blockage belongs to the technical field of blast furnace ironmaking coal injection equipment and is used for reducing blockage of the pulverized coal filter. According to the technical scheme, a filter cylinder is a vertical cylinder, the bottom of the cylinder of the filter cylinder is sealed by a steel plate, a top plate connecting flange is welded to the outer portion of the circumference of an opening in the upper end of the cylinder of the filter cylinder, and a top plate covers the upper end of the cylinder of the filter cylinder and is connected with the top plate connecting flange through a flange bolt and a nut; the sieve plate is obliquely placed in an inner cavity of the filter cylinder, the periphery of the sieve plate is welded with the inner wall of the cylinder of the filter cylinder, the inlet pipe and the outlet pipe are fixedly mounted on two opposite sides outside the cylinder of the filter cylinder respectively, and the included angle between the plane of the sieve plate and the center line of the inlet pipe is smaller than 90 degrees. The filter is simple in structure and convenient to use, has the characteristics of large filtering area, difficulty in blockage, small resistance, stability in operation and the like, and can effectively reduce blockage and ensure normal use of the filter.

Description

Technical Field

[0001] This utility model relates to a pulverized coal filter that can reduce clogging, belonging to the technical field of pulverized coal injection equipment for blast furnace ironmaking. Background Technology

[0002] Currently, pulverized coal injection (PCO) is widely used in blast furnace ironmaking. PCO involves directly injecting finely ground anthracite, bituminous coal, or a mixture of both into the blast furnace through the tuyeres to replace coke as a heat source and reducing agent, thereby reducing the coke ratio and lowering the cost of pig iron. It represents a major technological revolution in modern blast furnace smelting, offering advantages such as safety, reliability, and ease of operation, and plays a crucial role in reducing the cost of molten iron in blast furnaces.

[0003] Pulverized coal filters are crucial components of blast furnace pulverized coal injection equipment. Installed after the air regulator in the main pulverized coal injection pipeline at the outlet of the injection tank, they filter out coarse and large particles, as well as other debris such as woven fibers and wood chips, ensuring unobstructed pneumatic conveying of pulverized coal. Currently, most pulverized coal filters used in pulverized coal injection are horizontally arranged, consisting of an inlet pipe, a filter body, and an outlet pipe. The screen plate is vertically installed in the middle of the filter body. This type of filter is small and easy to install. However, its disadvantage is that during operation, the pulverized coal flows vertically through the screen plate, causing impurities in the pulverized coal to be adsorbed onto the screen plate surface. This accumulation easily clogs the screen holes, increasing resistance and affecting performance. Therefore, improvement is necessary. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a coal powder filter that can effectively reduce clogging. This filter has the characteristics of large filtration area, not easy to clog, low resistance, and stable operation, which can effectively reduce clogging and ensure the normal use of the filter.

[0005] The technical solution to the above technical problem is:

[0006] A pulverized coal filter that can effectively reduce clogging includes a filter cylinder, a top plate connecting flange, a top plate, a screen plate, an inlet pipe, and an outlet pipe. The filter cylinder is an upright cylindrical body, with the bottom of the cylinder sealed by a steel plate. The top plate connecting flange is welded to the outer circumference of the opening at the top of the cylindrical body. The top plate covers the upper end of the cylindrical body and is connected to the top plate connecting flange by flange bolts and nuts. The screen plate is placed obliquely inside the cylindrical body of the filter cylinder, and its periphery is welded to the inner wall of the cylindrical body. The inlet pipe and outlet pipe are respectively fixedly installed on opposite sides of the outer side of the cylindrical body of the filter cylinder, and the angle between the plane of the screen plate and the center line of the inlet pipe is less than 90°.

[0007] The above-mentioned coal powder filter, which can effectively reduce clogging, has a cleaning hole at the center of the top surface of the filter cylinder. A cleaning hole connector is welded around the circumference of the cleaning hole. A connector flange is welded around the upper circumference of the cleaning hole connector. A cleaning hole blind plate covers the upper end of the cleaning hole connector. The cleaning hole blind plate and the connector flange are connected by flange bolts and nuts.

[0008] The above-mentioned coal powder filter can effectively reduce clogging. The inlet pipes on both sides of the cylindrical body of the filter cylinder are fixedly connected to the upper part of the cylindrical body of the filter cylinder, and the inlet of the inlet pipe is opposite to the center of the screen plate. The outlet pipe is fixedly connected to the lower part of the cylindrical body of the filter cylinder, and the outlet of the outlet pipe is opposite to the lower part of the screen plate.

[0009] The beneficial effects of this utility model are:

[0010] The screen plate of this invention is placed at an incline inside the filter cylinder, and the coal powder flows into contact with the screen plate at a small angle. Impurities in the coal powder will be diverted to the upper and lower ends of the screen plate under the action of airflow and gravity, keeping the main screen surface of the screen plate unobstructed. The inclined screen plate increases the filtration area, making the filter less prone to clogging. Opening the cleaning hole blind plate at the upper end of the filter cylinder allows the screen plate inside the filter cylinder to be cleaned, removing impurities that clog the screen holes and ensuring the normal operation of the screen plate.

[0011] This utility model has a simple structure and is easy to use. It features a large filtration area, is not prone to clogging, has low resistance, and is stable in operation. It can effectively reduce clogging and ensure the normal use of the filter. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a top view of the sieve plate.

[0014] The following are marked in the diagram: 1. Filter body, 2. Top plate connecting flange, 3. Top plate, 4. Screen plate, 5. Inlet pipe, 6. Outlet pipe, 7. Cleaning hole, 8. Cleaning hole connector, 9. Connecting flange, 10. Cleaning hole blind plate, 11. Flange bolts and nuts. Detailed Implementation

[0015] This utility model consists of a filter cylinder 1, a top plate connecting flange 2, a top plate 3, a screen plate 4, an inlet pipe 5, an outlet pipe 6, a cleaning hole connecting pipe 8, a connecting pipe flange 9, a cleaning hole blind plate 10, and flange bolts and nuts 11.

[0016] As shown in the diagram, the filter housing 1 is an upright cylindrical body. The bottom of the cylindrical body is sealed by a steel plate. A top plate connecting flange 2 is welded to the outer circumference of the opening at the top of the cylindrical body. The top plate 3 covers the upper end of the cylindrical body and is connected to the top plate connecting flange 2 by flange bolts and nuts 11. During maintenance, the top plate 3 can be removed to repair or replace the screen plate 4.

[0017] As shown in the figure, the sieve plate 4 is placed at an angle inside the cylindrical cavity of the filter housing 1, and the periphery of the sieve plate 4 is welded to the inner wall of the cylindrical cavity of the filter housing 1. The inlet pipe 5 and the outlet pipe 6 are respectively fixedly installed on opposite sides of the outside of the cylindrical cavity of the filter housing 1. The inlet pipe 5 is fixedly connected to the upper part of the filter housing 1, and the opening of the inlet pipe 5 is opposite to the center of the sieve plate 4. The outlet pipe 6 is fixedly connected to the lower part of the filter housing 1, and the opening of the outlet pipe 6 is opposite to the lower part of the sieve plate 4.

[0018] As shown in the diagram, the angle between the plane of the sieve plate 4 and the centerline of the inlet pipe is less than 90°. This arrangement prevents impurities from adhering to the central surface of the sieve plate 4. Lighter, larger impurities are drawn to the upper dead zone of the sieve plate 4 by the airflow, while denser, smaller impurities are deposited at the lower dead zone under gravity, keeping the main surface of the sieve plate 4 clear. Furthermore, the inclined placement of the sieve plate 4 increases the filtration area for the same filter cylinder diameter, making the filter less prone to clogging, with lower resistance and more stable operation.

[0019] As shown in the diagram, the top surface 3 of the filter housing 1 has a cleaning hole 7 at its center. A cleaning hole connector 8 is welded around the circumference of the cleaning hole 7. A connector flange 9 is welded around the upper circumference of the cleaning hole connector 8. A cleaning hole blind plate 10 covers the upper end of the cleaning hole connector 8. The cleaning hole blind plate 10 is connected to the connector flange 9 by flange bolts and nuts 11. Opening the cleaning hole blind plate 10 allows for the cleaning of the screen plate 4 inside the filter housing 1, removing impurities that clog the screen holes of the screen plate 4 and ensuring the normal operation of the screen plate 4.

[0020] An embodiment of this utility model is as follows:

[0021] The diameter of filter cylinder 1 is 530mm and the height is 640mm;

[0022] The diameter of the top plate connecting flange 2 is 700mm;

[0023] The top plate 3 has a diameter of 700mm and a thickness of 16mm, and the cleaning hole 7 has a diameter of 159mm;

[0024] The short diameter of the sieve plate 4 is 500 mm, the long diameter is 694 mm, and the inclination angle is 45°.

[0025] The diameter of inlet pipe 5 is 108mm and the length is 300mm;

[0026] The diameter of outlet pipe 6 is 108mm and the length is 300mm;

[0027] The diameter of the cleaning hole connector 8 is 159mm and the length is 100mm;

[0028] The diameter of flange 9 is 240mm;

[0029] The diameter of the cleaning hole blind plate 10 is 500mm and the thickness is 16mm.

Claims

1. A pulverized coal filter that can effectively reduce clogging, characterized in that: It includes a filter cylinder (1), a top plate connecting flange (2), a top plate (3), a sieve plate (4), an inlet pipe (5), and an outlet pipe (6). The filter cylinder (1) is an upright cylindrical body. The bottom of the cylindrical body of the filter cylinder (1) is closed by a steel plate. The top plate connecting flange (2) is welded to the outside of the opening circumference of the upper end of the cylindrical body of the filter cylinder (1). The top plate (3) covers the upper end of the cylindrical body of the filter cylinder (1). The top plate (3) and the top plate connecting flange (2) are connected by flange bolts and nuts (11). The sieve plate (4) is placed obliquely in the inner cavity of the cylindrical body of the filter cylinder (1). The periphery of the sieve plate (4) is welded to the inner wall of the cylindrical body of the filter cylinder (1). The inlet pipe (5) and the outlet pipe (6) are respectively fixedly installed on opposite sides of the outer side of the cylindrical body of the filter cylinder (1). The angle between the plane of the sieve plate (4) and the center line of the inlet pipe (5) is less than 90°.

2. The pulverized coal filter according to claim 1, which can effectively reduce clogging, is characterized in that: The filter cylinder (1) has a cleaning hole (7) at the center of the top plate (3). A cleaning hole connector (8) is welded around the cleaning hole (7). A connector flange (9) is welded around the upper end of the cleaning hole connector (8). A cleaning hole blind plate (10) covers the upper end of the cleaning hole connector (8). The cleaning hole blind plate (10) and the connector flange (9) are connected by flange bolts and nuts (11).

3. The pulverized coal filter according to claim 1, which can effectively reduce clogging, is characterized in that: The inlet pipes (5) on both sides of the cylindrical body of the filter cylinder (1) are fixedly connected to the upper part of the cylindrical body of the filter cylinder (1), and the inlet of the inlet pipe (5) is opposite to the center of the sieve plate (4). The outlet pipe (6) is fixedly connected to the lower part of the cylindrical body of the filter cylinder (1), and the inlet of the outlet pipe (6) is opposite to the lower part of the sieve plate (4).

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