A dry dust removal and screening device for mines

Abstract

The utility model relates to the technical field of mine dust removal equipment discloses a kind of mine dry dust removal screening devices, including cyclone separation cavity and the air inlet pipeline connected to the upper end of cyclone separation cavity, the upper end of cyclone separation cavity is provided with first air outlet pipeline, and first air outlet pipeline is connected with the multistage inertia collision unit on the top surface of cyclone separation cavity, the lower end of cyclone separation cavity is provided with first outlet, and first outlet is connected with dust collection bin, the bottom of dust collection bin is provided with second outlet, and second outlet is installed with discharge gate, and coarse filtering unit is arranged at air inlet pipeline;The utility model is in combination with cyclone separation cavity and multistage inertia collision unit, can separate and screen the particles of different particle sizes in dust, and improve dust removal effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining dust removal equipment, and relates to a dry dust removal and screening device for mining. Background Technology

[0002] Coal mines are areas where humans extract coal resources in coal-rich areas. They are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, underground tunnels are usually dug to extract the coal; this is called an underground coal mine. When the coal seam is very close to the surface, the surface soil layer is usually stripped off to extract the coal; this is called an open-pit coal mine. A large amount of dust is generated during the coal mining process. Dust not only causes wear and blockage of equipment, affecting the normal operation of production equipment, but also poses a serious threat to the health of workers.

[0003] Currently, commonly used dust removal methods include wet dust collection, dry dust collection, and electrostatic precipitators. Dry dust collection primarily utilizes cyclone separation and filtration. Cyclone separators use the centrifugal force of airflow to separate larger dust particles, while filtration mainly uses filter media to block fine particles in the air. However, existing dry dust collection devices typically only have one separation unit and cannot screen and remove dust of different particle sizes, resulting in poor dust removal efficiency. Therefore, to solve these problems, there is an urgent need for a mine-use dry dust collection and screening device with multi-stage separation capabilities. Utility Model Content

[0004] This utility model proposes a dry dust removal and screening device for mining, which effectively solves the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A dry dust removal and screening device for mining includes a cyclone separation chamber and an air inlet pipe connected to the upper end of the cyclone separation chamber. A first air outlet pipe is provided at the upper end of the cyclone separation chamber. The first air outlet pipe is connected to a multi-stage inertial collision unit located on the top surface of the cyclone separation chamber. A first waste outlet is provided at the lower end of the cyclone separation chamber. The first waste outlet is connected to a dust collection bin. A second waste outlet is opened at the bottom of the dust collection bin. A discharge gate is installed at the second waste outlet.

[0006] A coarse filter unit is installed at the air inlet duct.

[0007] Furthermore, the multi-stage inertial collision unit includes an annular cavity and a multi-stage inertial collision plate disposed inside the annular cavity. An air inlet connected to a first air outlet duct is provided on the inner annular surface of the annular cavity, and an air outlet is provided on the top surface of the annular cavity. A separation plate located at the air inlet and the air outlet is disposed inside the annular cavity; the air outlet is connected to a second air outlet duct.

[0008] Furthermore, each of the multi-stage inertial collision plates has multiple plates arranged side by side;

[0009] The spacing between the plates in each stage of the multi-stage inertial collision plate decreases progressively.

[0010] Furthermore, the plate is wavy and surrounds the axis of the annular cavity.

[0011] Furthermore, the plate extends to the middle of the annular cavity, the bottom of the annular cavity is a dust collection chamber, and a cavity cover is provided at the bottom of the outer ring surface of the annular cavity.

[0012] Furthermore, the air inlet is elongated and vertically positioned.

[0013] Furthermore, the coarse filtration unit includes a frame and a filter screen disposed in the frame, and a window for inserting the frame is provided on one side of the air inlet duct.

[0014] Furthermore, a handle is connected to the end face of the frame where the window protrudes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By combining the cyclone separation chamber and the multi-stage inertial collision unit, dust particles of different sizes can be separated and screened, thus improving the dust removal effect.

[0017] By placing the annular cavity on the top surface of the cyclone separator, the overall volume is reduced, making it easier to arrange on-site;

[0018] Through multi-stage inertial impact plates, fine particles can be captured step by step, further enhancing the dust removal function. Attached Figure Description

[0019] Figure 1 This is a top view of the present invention;

[0020] Figure 2 for Figure 1 AA section view in the middle;

[0021] Figure 3 for Figure 2 BB cross-section diagram;

[0022] Figure 4 for Figure 3 Enlarged view of section C in the image;

[0023] Figure 5 This is a schematic diagram showing the coarse filter unit and the air inlet duct in this utility model.

[0024] In the diagram: 1. Cyclone separator chamber; 2. Air inlet duct; 3. First air outlet duct; 4. First waste outlet; 5. Dust collection bin; 6. Second waste outlet; 7. Unloading gate; 8. Coarse filter unit; 801. Frame; 802. Filter screen; 803. Handle; 9. Annular chamber; 10. Multi-stage inertial collision plate; 11. Air inlet; 12. Second air outlet duct; 13. Plate; 14. Chamber cover; 15. Separation plate. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 5 As shown, this utility model proposes a dry dust removal and screening device for mining, including a cyclone separation chamber 1 and an air inlet pipe 2 connected to the upper end of the cyclone separation chamber 1. The air inlet pipe 2 is installed along the tangential direction of the cyclone separation chamber 1, so that the air carrying dust enters along the tangential direction of the cyclone separation chamber 1, and at a certain flow rate, the dust has centrifugal force, and the cross-section of the air inlet pipe 2 is rectangular; a support is connected to the lower end of the cyclone separation chamber 1. The support is welded from steel profiles. The support is prior art and is not shown in the accompanying drawings of this embodiment.

[0027] A first air outlet duct 3 is installed at the upper end of the cyclone separation chamber 1. The axis of the first air outlet duct 3 coincides with the axis of the cyclone separation chamber 1. The upper end of the first air outlet duct 3 extends out of the cyclone separation chamber 1, and the lower end of the first air outlet duct 3 extends to the middle of the cyclone separation chamber 1. After the airflow in the cyclone separation chamber 1 undergoes centrifugal motion along the chamber wall, it enters from the lower end of the first air outlet duct 3 and exits from the upper end. The cyclone separation chamber 1 can effectively remove dust with larger particle sizes.

[0028] The first air outlet duct 3 is connected to a multi-stage inertial collision unit located on the top surface of the cyclone separation chamber 1. The lower end of the cyclone separation chamber 1 is provided with a first sewage outlet 4. The first sewage outlet 4 is connected to a dust collection bin 5 through a threaded structure or a flange structure. The bottom of the dust collection bin 5 is provided with a second sewage outlet 6. A discharge gate 7 is installed at the second sewage outlet 6. The discharge gate 7 can be a slide valve, flap valve, or butterfly valve, as long as it meets the requirement of discharging the dust collected in the dust collection bin 5.

[0029] In this embodiment, a coarse filter unit 8 is installed at the air inlet duct 2. The coarse filter unit 8 includes a frame 801 and a filter screen 802 with its edges fixed to the frame 801. The filter screen 802 is disposed in the frame 801. A window for inserting the frame 801 is provided on one side of the air inlet duct 2. An installation edge is provided at one end of the frame 801. The installation edge can be fixed to the window by bolts. A sealing gasket is provided between the installation edge and the window to prevent dust leakage from the window. The filter screen 802 can filter larger debris in the outside air to prevent it from entering the cyclone separation chamber 1 and the multi-stage inertial collision unit and causing blockage. Larger debris includes small branches, plastic pieces, strips of cloth, or leaves. Preferably, a handle 803 is connected to the end face of the frame 801 exposed at the window to facilitate the disassembly and assembly of the frame 801 by maintenance personnel.

[0030] In this embodiment, the multi-stage inertial collision unit includes an annular cavity 9 and a multi-stage inertial collision plate 10 disposed inside the annular cavity 9. The upper end of the annular cavity 9 is closed, and the lower end is open. The upper end of the first air outlet duct 3 is inserted into the inner annular surface of the annular cavity 9 and extends to the middle. An air inlet 11 connected to the first air outlet duct 3 is provided on the inner annular surface of the annular cavity 9. An air outlet is provided on the top surface of the annular cavity 9. A separation plate 15 located between the air inlet 11 and the air outlet is disposed inside the annular cavity 9. The air outlet is connected to a second air outlet duct 12. The airflow discharged from the first air outlet duct 3 will enter the annular cavity 9 through the air inlet 11. The multi-stage inertial collision unit in the annular cavity 9 will capture the dust in the airflow. The airflow will be discharged from the air outlet into the second air outlet duct 12. Due to the presence of the separation plate 15, the dust will not be recycled back to the air inlet 11.

[0031] Preferably, each of the multi-stage inertial collision plates 10 has multiple plates 13 arranged side by side, and the spacing between the plates 13 in each stage of the multi-stage inertial collision plate 10 decreases progressively. In this embodiment, there are three stages of inertial collision plates. The airflow entering the annular cavity 9 from the air inlet 11 collides with the plates 13 in the multi-stage inertial collision plate 10, thereby capturing dust in the airflow and achieving the purpose of dust removal. Furthermore, the continuously decreasing spacing between the plates 13 in each stage narrows the airflow channel and continuously increases the airflow velocity, which can capture dust particles with smaller diameters and improve the dust removal effect.

[0032] Furthermore, the plate 13 is wavy and surrounds the axis of the annular cavity 9. The wavy shape can increase the collision area of ​​dust in the airflow with the plate 13, and can also cause the streamline of the airflow to be deflected continuously. The dust itself still has inertia and will collide violently with the plate 13 and be captured. As the distance between the plates 13 in each stage of inertial collision plate continuously decreases, smaller dust particles will be captured.

[0033] In this embodiment, the plate 13 extends to the middle of the annular cavity 9. The bottom of the annular cavity 9 is a dust collection chamber. A chamber cover 14 is provided at the bottom of the outer ring surface of the annular cavity 9. The chamber cover 14 is connected to the annular cavity 9 by bolts. A rubber sealing gasket is also provided between the chamber cover 14 and the annular cavity 9. After the dust in the airflow in the annular cavity 9 collides with the plate 13, it will fall into the dust collection chamber at the bottom. When cleaning the dust in the dust collection chamber, the chamber cover 14 is opened and the maintenance personnel can sweep out the dust in the dust collection chamber. For the dust captured on the plate 13, the dust captured on the plate 13 can be shaken off by tapping the outer wall of the annular cavity 9.

[0034] In this embodiment, the air inlet 11 is elongated and vertically arranged to increase the air intake area of ​​the annular cavity 9.

[0035] In use, this invention uses an external fan to draw dusty air into the cyclone separator chamber 1 through the inlet duct 2. Centrifugal force initially separates larger dust particles from the airflow, which are then continuously collected in the lower dust collection chamber 5. The airflow is then introduced into the top annular chamber 9 through the first outlet duct 3, and passes through multi-stage inertial collision plates 10. This causes the dust particles in the airflow to continuously collide with the surfaces of the plates 13 within the multi-stage inertial collision plates 10. As the distance between the plates 13 decreases, smaller dust particles are captured, improving the dust removal effect. Finally, the airflow is discharged from the second outlet duct 12. This invention can separate dust particles of different sizes, thus possessing the characteristic of dust removal for different particle sizes.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dry dust removal and screening device for mining, comprising a cyclone separation chamber (1) and an air inlet pipe (2) connected to the upper end of the cyclone separation chamber (1), characterized in that: The upper end of the cyclone separation chamber (1) is provided with a first air outlet pipe (3), the first air outlet pipe (3) is connected to a multi-stage inertial collision unit located on the top surface of the cyclone separation chamber (1), the lower end of the cyclone separation chamber (1) is provided with a first sewage outlet (4), the first sewage outlet (4) is connected to a dust collection bin (5), the bottom of the dust collection bin (5) is provided with a second sewage outlet (6), and a discharge gate (7) is installed at the second sewage outlet (6). A coarse filter unit (8) is installed at the air inlet duct (2).

2. The dry dust removal and screening device for mining according to claim 1, characterized in that: The multi-stage inertial collision unit includes an annular cavity (9) and a multi-stage inertial collision plate (10) disposed inside the annular cavity (9). An air inlet (11) connected to the first air outlet duct (3) is provided on the inner annular surface of the annular cavity (9). An air outlet is provided on the top surface of the annular cavity (9). A separation plate (15) located between the air inlet (11) and the air outlet is provided inside the annular cavity (9). The air outlet is connected to a second air outlet duct (12).

3. The dry dust removal and screening device for mining according to claim 2, characterized in that: Each of the multi-stage inertial collision plates (10) has multiple plates (13) arranged side by side. The spacing between the plates (13) in each stage of the multi-stage inertial collision plate (10) decreases progressively.

4. The dry dust removal and screening device for mining according to claim 3, characterized in that: The plate (13) is wavy and surrounds the axis of the annular cavity (9).

5. The dry dust removal and screening device for mining according to claim 3, characterized in that: The plate (13) extends to the middle of the annular cavity (9), the bottom of the annular cavity (9) is a dust collection chamber, and a cavity cover (14) is provided at the bottom of the outer ring surface of the annular cavity (9).

6. The dry dust removal and screening device for mining according to claim 2, characterized in that: The air inlet (11) is long and vertical.

7. The dry dust removal and screening device for mining according to claim 1, characterized in that: The coarse filtration unit (8) includes a frame (801) and a filter screen (802) disposed in the frame (801). A window for inserting the frame (801) is provided on one side of the air inlet duct (2).

8. The dry dust removal and screening device for mining according to claim 7, characterized in that: A handle (803) is connected to the end face of the exposed window of the frame (801).

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