Impurity removal device for coal dressing circulating water

Abstract

The utility model discloses a coal dressing circulating water impurity removal device, which belongs to the technical field of circulating water impurity removal and comprises an impurity removal water tank for removing impurities from coal dressing circulating water and a water inlet pipe mounted on a top cover of the impurity removal water tank. The end, penetrating into the impurity removal water pool, of the water inlet pipe is rotationally provided with a rotating sleeve for input water to be evenly and rotationally scattered on the impurity removal screen, a hemispherical head is integrally formed at the bottom of the rotating sleeve, a plurality of water inlet holes are formed in the outer wall of the peripheral side of the rotating sleeve in an annular array mode, and even spraying openings are formed in the bottom end of the hemispherical head. A rotary flow dividing fan blade capable of rotating and equally dividing water flow by means of downward impact force of the water flow and rotating force of the rotary sleeve is arranged above the uniform spraying opening and located in an inner cavity of the hemispherical head, and a movable impurity removing shoveling plate is arranged on the top face of the impurity removing screen and located in the impurity removing water pool. And the movable impurity removal shoveling plate is in frictional contact with the top surface of the impurity removal screen to movably shove impurities, and the impurities are discharged through the lifting assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of circulating water impurity removal, in particular to a coal preparation circulating water impurity removal device. Background Art

[0002] In the heavy medium coal washing process, circulating water is mainly used for removing media on the removing screen. The quality of circulating water directly affects the removing effect of the removing screen. Occasionally, there will be debris (such as silt or leaves, etc.) in the circulating water, and the circulating water quality is poor. Therefore, circulating water impurity removal equipment is required. The current circulating water impurity removal equipment generally sprays circulating water into a pool with a screen through an inlet pipe, and one end of the inlet pipe in the pool is an open structure, which does not have a structure for evenly spraying circulating water, resulting in the circulating water being sprayed directly on the screen. After long-term use, the screen position directly below the inlet pipe is easily damaged by long-term impact of water flow (such as water dripping through a stone), reducing the circulating water impurity removal efficiency.

[0003] After searching, the existing Chinese patent publication number is: CN211836599U, a coal preparation circulating water purification device, including a circulating water pool arranged between two tailings concentration water pools, a stainless steel slot screen arranged above the circulating water pool and a cleaning device arranged above the stainless steel slot screen, the stainless steel slot screen is fixed above the circulating water pool, the two tailings concentration water pools respectively lead the tailings water to the top of the left and right ends of the stainless steel slot screen through water channels, the stainless steel slot screen is inclined with the upper end high and the lower end low, and the cleaning device includes a head electric roller, a tail roller, a conveying analysis frame and a conveyor belt with a scraper on the surface.

[0004] The cited patent document also has the same problem. It does not have a structure for evenly spraying circulating water, resulting in the circulating water being sprayed directly onto the screen. After long-term use, the screen position directly below the water inlet pipe is easily damaged by long-term impact of water flow (like water dripping through a stone), reducing the efficiency of circulating water impurity removal. Utility Model Content

[0005] The utility model aims to provide a coal preparation circulating water impurity removal device to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coal preparation circulating water impurity removal device, comprising a impurity removal water tank for coal preparation circulating water impurity removal and a water inlet pipe installed on the top cover of the impurity removal water tank, a drainage pipe is connected through the bottom surface of the impurity removal water tank, and an impurity removal screen is arranged in the inner cavity of the impurity removal water tank;

[0007] The water inlet pipe passes through one end of the impurity removal pool and is rotatably installed with a rotating sleeve for inputting water that is evenly and rotatingly sprinkled on the impurity removal screen. The bottom of the rotating sleeve is integrally formed with a hemispherical head, and a plurality of water inlet holes are provided in a circular array on the peripheral outer wall of the rotating sleeve. A uniform spraying port is provided at the bottom end of the hemispherical head, and a rotating diversion fan blade that can rotate and evenly distribute the water flow by means of the downward impact force of the water flow and the rotational force of the rotating sleeve is provided above the uniform spraying port and in the inner cavity of the hemispherical head. A movable impurity removal shoveling plate is provided on the top surface of the impurity removal screen and in the impurity removal pool. The movable impurity removal shoveling plate moves in frictional contact with the top surface of the impurity removal screen to remove impurities and discharge the impurities through the lifting component.

[0008] Preferably, in this solution, a sealing bearing is interference-fitted on the circumference of one end of the water inlet pipe that passes through the impurity removal tank, and the inner ring of the rotating sleeve is interference-fitted with the outer ring of the sealing bearing.

[0009] Preferably, in this solution, a rotating rod is rotatably installed in the inner cavity of the hemispherical head, and the rotating flow-dividing blades are symmetrically fixedly installed on the outer wall of the circumference of the rotating rod;

[0010] The rotating flow-dividing blades are vertically arranged above the uniform spraying port.

[0011] Preferably, two anti-falling down-pressing rods are symmetrically mounted on the top surface of the rotating sleeve via bolts, and the bottom surfaces of the free ends of the anti-falling down-pressing rods are in frictional contact with the top surface of the sealing bearing.

[0012] Preferably, a linear movable guide rail is installed on the upper part of the inner wall of one side of the de-impurity water tank, and a positioning slide groove is opened on the upper part of the inner wall of the other side. The linear movable guide rail and the positioning slide groove are both adapted to be slidably connected with a horizontal T-shaped slider, a T-shaped top beam is fixedly connected between the two T-shaped sliders, and the bottom surface of the T-shaped top beam is connected to a mounting cross plate.

[0013] Preferably, in this solution, the lifting assembly includes a hydraulic lifting column fixedly installed in the middle position of the bottom surface of the mounting cross plate.

[0014] Preferably, the top surface of the mobile debris-removing and scraping plate is integrally formed with a connecting end plate portion, and the bottom lifting end of the hydraulic lifting column is fixedly connected to the connecting end plate portion.

[0015] Preferably, in this solution, positioning uprights are symmetrically welded on both sides of the hydraulic lifting column and on the top surface of the connecting end plate portion, and the positioning uprights penetrate the mounting cross plate longitudinally.

[0016] Preferably, a slag discharge port is provided on the outer wall of the debris removal pool facing the sharp scraping direction of the movable debris removal scraping plate, a slag discharge box is welded to the outer side of the slag discharge port and located on the outer wall of the debris removal pool, and a slag discharge flow channel is provided on the bottom surface of the slag discharge box.

[0017] Preferably, the bottom of the slag discharge port has a slag discharge slope for discharging impurities.

[0018] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0019] The coal preparation circulating water impurity removal device uses an innovative design of rotating sleeve and rotating diversion fan blades to fully disperse the circulating water before entering the impurity removal screen, making the separation of impurities and water more thorough, improving the impurity removal rate, and reducing the direct impact of circulating water on the screen, avoiding the problem of easy damage to the screen, thereby significantly improving the impurity removal efficiency and effect;

[0020] The circulating water is initially dispersed before entering the impurity removal pool. The rotation of the rotating sleeve, combined with the internal rotating diversion blades, can further refine the incoming water flow and spray it evenly on the impurity removal screen, avoiding damage caused by the water flow directly impacting the impurity removal screen, improving the impurity removal efficiency and the durability of the impurity removal screen. The uniform spray port at the bottom of the hemispherical head allows the water flow to spread more evenly before entering the impurity removal area. This design helps to evenly distribute the hydraulic force, ensuring that each part of the impurity removal screen can be effectively utilized, while reducing local overload, further improving the impurity removal efficiency and the maintenance cycle of the equipment;

[0021] The mobile impurity removal scraper is a key component directly involved in the impurity removal operation. It is designed to move along the surface of the impurity removal screen, and scrapes or pushes the material forward through special materials such as wear-resistant rubber on it, so as to achieve the purpose of automatically cleaning the impurity removal screen. Its movement not only improves the impurity removal efficiency, but also reduces manual intervention and labor intensity, making the impurity removal process more continuous and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 This is a schematic structural diagram of the connection state of the water inlet pipe and the rotating sleeve of the utility model;

[0025] Figure 3 It is a cross-sectional view of the rotating sleeve and the hemispherical head of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the connection state of the mobile debris removal and shoveling plate of the utility model;

[0027] Figure 5 It is a schematic structural diagram of the connection state of the installation cross plate and the connection end plate of the utility model.

[0028] Description of reference numerals:

[0029] In the figure: 1. De-waxing water tank; 2. Top cover; 3. Water inlet pipe; 4. Drain pipe; 5. Slag drop box; 6. Fixed mounting plate; 7. Sealed bearing; 8. Rotating sleeve; 9. Hemispherical head; 10. Water inlet hole;

[0030] 11. Uniform spraying port; 12. Anti-drop pressure rod; 13. Rotating rod; 14. Rotating diversion fan blade; 15. Slag discharge slope; 16. Slag discharge port; 17. Servo motor; 18. Linear moving guide rail; 19. Debris removal screen; 20. T-shaped top beam;

[0031] 21. Mobile debris removal and shoveling plate; 22. Lifting assembly; 23. Installing cross plate; 24. T-shaped slider; 25. Screw rod; 26. Positioning cross bar; 27. Connecting end plate; 28. Hydraulic lifting column; 29. ​​Positioning vertical pole. DETAILED DESCRIPTION

[0032] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0033] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0034] This embodiment provides Figures 1 to 5 The coal preparation circulating water impurity removal device shown in the figure includes a impurity removal water tank 1 for removing impurities from the coal preparation circulating water and a water inlet pipe 3 installed on the top cover 2 of the impurity removal water tank 1. A drainage pipe 4 is connected to the bottom surface of the impurity removal water tank 1, and a valve is provided inside the drainage pipe 4. An impurity removal screen 19 is provided in the inner cavity of the impurity removal water tank 1. A fixed mounting plate 6 is welded through the circumferential side of the water inlet pipe 3, and the fixed mounting plate 6 is installed on the top surface of the top cover 2 by bolts.

[0035] In this embodiment, a rotating sleeve 8 is rotatably installed at one end of the water inlet pipe 3 that penetrates into the impurity removal pool 1 to supply water for uniformly rotating and spreading on the impurity removal screen. A hemispherical head 9 is integrally formed at the bottom of the rotating sleeve 8. A plurality of water inlet holes 10 are provided in a circular array on the peripheral outer wall of the rotating sleeve 8. A uniform spraying port 11 is provided at the bottom end of the hemispherical head 9. A uniform spraying port 11 is provided above the uniform spraying port 11 and in the inner cavity of the hemispherical head 9. A rotating device that can evenly distribute the water flow by means of the downward impact force of the water flow and the rotational force of the rotating sleeve 8 is provided. The rotating diverter blades 14, the water inlet pipe 3 penetrates into the impurity removal pool 1, and the sealing bearing 7 is interference fit on the circumference of one end. The inner ring of the rotating sleeve 8 is interference fit with the outer ring of the sealing bearing 7. The rotating rod 13 is rotatably installed in the inner cavity of the hemispherical head 9. The rotating diverter blades 14 are symmetrically fixed on the outer wall of the circumference of the rotating rod 13. The rotating diverter blades 14 are vertically arranged above the uniform spraying port 11. These aperture sizes and layouts need to be carefully calculated after practical application to ensure that the water can be quickly dispersed when it flows in. The spraying port 11 is opened at the bottom end of the hemispherical head 9 to ensure that the water can be evenly covered on the impurity removal screen 19 in an atomized state. When the circulating water enters the rotating sleeve 8 through the water inlet pipe 3, the water flow first encounters the obstruction and guidance of the rotating diverter blades 14 inside the hemispherical head 9. The rotating diverter blades 14 rotate rapidly under the dual effects of the impact force of the water flow and the rotation force of the rotating sleeve 8 itself, and the water flow is evenly divided and accelerated, and then sprayed out through the uniform spraying port 11. This design effectively avoids the direct impact of high-energy water flow on the impurity removal screen 19, reduces the wear on the impurity removal screen 19, extends the service life of the impurity removal screen 19, and also improves the separation efficiency of impurities and water.

[0036] In this embodiment, the sealing bearing 7 plays a vital role in this technical solution. It is installed at one end of the water inlet pipe 3 that penetrates into the impurity removal pool 1 and fits tightly with the inner ring of the rotating sleeve 8. The presence of the sealing bearing ensures the dynamic seal between the water inlet pipe and the rotating sleeve, effectively preventing the leakage of circulating water during the transportation process, and also supports the rotation of the rotating sleeve, reducing wear and extending the service life. This not only ensures the stable operation of the equipment, but also improves the efficiency and safety of water treatment.

[0037] In this embodiment, the rotating sleeve 8 is a core component, and its design purpose is to achieve uniform distribution of circulating water. Through the multiple water inlet holes 10 opened on the outer wall of the circumference, the circulating water is preliminarily dispersed before entering the impurity removal pool 1. The rotation of the rotating sleeve 8, combined with the internal rotating diversion blades 14, can further refine the incoming water flow and evenly spray it on the impurity removal screen 19, avoiding the damage caused by the water flow directly impacting the impurity removal screen 19, and improving the impurity removal efficiency and the durability of the impurity removal screen 19.

[0038] In this embodiment, the hemispherical head 9 is installed at the bottom of the rotating sleeve 8, and its main function is to guide the water flow and form a uniform spraying effect. The uniform spraying port 11 at the bottom of the hemispherical head 9 allows the water flow to spread more evenly before entering the impurity removal area. This design helps to evenly distribute the hydraulic force, ensure that each part of the impurity removal screen 19 can be effectively utilized, and reduce local overload, further improving the impurity removal efficiency and the maintenance cycle of the equipment.

[0039] In this embodiment, the rotating rod 13 is installed inside the hemispherical head 9, and the rotating diverter blades 14 are fixed to the outer wall of the circumference thereof. The rotating rod 13 is driven by the impact force of the incoming water and the rotational force of the rotating sleeve 8, driving the rotating diverter blades 14 to rotate, further enhancing the dispersion effect of the water flow, so that the water flow is sprayed more evenly on the impurity removal screen 19, thereby optimizing the impurity removal efficiency.

[0040] In this embodiment, the rotating diversion blade 14 is a key component for secondary dispersion of the water flow. Through its stirring and guiding effect during the rotation process, the water flow forms a more uniform flow in the hemispherical head 9 and then sprays out through the uniform spray port 11. This not only ensures the uniformity of water spraying, but also improves the separation efficiency of impurities and water, while reducing the direct impact force on the impurity removal screen 19, and prolonging the service life of the equipment.

[0041] In this embodiment, two anti-drop-off pressure rods 12 are symmetrically mounted on the top surface of the rotating sleeve 8 by bolts, and the bottom surfaces of the free ends of the anti-drop-off pressure rods 12 are in frictional contact with the top surface of the sealing bearing 7. The anti-drop-off pressure rods 12 are mounted on the top surface of the rotating sleeve 8, and the bottom surfaces of the free ends of the anti-drop-off pressure rods 12 are in contact with the top surface of the sealing bearing 7, which plays a role in fixing the rotating sleeve 8 and preventing it from falling off due to water flow impact or vibration. This design increases the stability of the entire device, ensuring that the rotating sleeve 8 can work continuously and stably, and will not affect the impurity removal effect or cause equipment damage due to accidental movement.

[0042] In this embodiment, a movable impurity removal shoveling plate 21 is provided on the top surface of the impurity removal screen 19 and is located in the impurity removal water pool 1. The movable impurity removal shoveling plate 21 moves by friction contact with the top surface of the impurity removal screen 19 to remove impurities and discharge impurities through the lifting component 22. A linear movable guide rail 18 is installed on the upper part of the inner wall of one side of the impurity removal water pool 1, and a positioning slide groove is opened on the upper part of the inner wall of the other side. A horizontal T-shaped slider 24 is adapted to be slidably connected in the linear movable guide rail 18 and the positioning slide groove. A screw rod 25 with a thread penetrating one of the T-shaped sliders 24 is rotatably installed inside the linear movable guide rail 18. A servo motor 17 is fixedly installed on the outer wall of the impurity removal water pool 1, and the output shaft of the servo motor 17 penetrates the impurity removal water pool 1 and is connected to the screw rod 25. A positioning cross bar 26 is penetrated and connected in the other T-shaped slider 24, and the positioning cross bar 26 is fixedly installed in the positioning slide groove.

[0043] In this embodiment, the servo motor 17 is used as a driving source in this technical solution. Its main function is to provide power for the T-shaped slider 24 on the linear movable guide rail, and to realize the precise linear movement of the T-shaped slider through the rotation of the screw 25. The advantages of the servo motor are its fast response speed and high positioning accuracy, which can ensure that the mobile impurity removal and shoveling plate 21 moves smoothly and accurately along the predetermined trajectory, thereby improving the automation and efficiency of the entire impurity removal process. The linear movable guide rail 18 provides a linear guide for the T-shaped slider, ensuring that it moves smoothly without shaking, thereby improving the stability and accuracy of the movement. By cooperating with the servo motor and the screw rod, the linear movable guide rail enables the mobile impurity removal and shoveling plate to move in a controlled manner along the surface of the impurity removal screen 19, thereby facilitating the continuous and uniform removal of impurities accumulated on the screen.

[0044] In this embodiment, the mobile impurity removal scraping plate 21 is a key component directly involved in the impurity removal operation. It is designed to be able to move in contact with the surface of the impurity removal screen 19, and scrape or push the material forward through the special material on it, such as wear-resistant rubber, to achieve the purpose of automatically cleaning the impurity removal screen 19. Its movement not only improves the impurity removal efficiency, but also reduces manual intervention and labor intensity, making the impurity removal process more continuous and efficient.

[0045] In this embodiment, the T-shaped slider 24 slides on the linear motion guide rail and receives the power of the servo motor and converts it into linear motion through the connection with the screw rod. As the core transmission part of the mobile system, it enables the debris removal and scraping plate to be accurately adjusted and moved along the guide rail, ensuring the flexibility and accuracy of the operation.

[0046] In this embodiment, the screw rod 25 converts the rotational motion of the servo motor 17 into linear motion by directly connecting with the servo motor 17, and drives the T-shaped slider 24 to move along the linear guide rail. The existence of the screw rod 25 ensures smooth and precise motion, and is a key transmission element for realizing automatic control.

[0047] In this embodiment, the positioning cross bar 26 is fixed in the positioning slide groove, and its function is to keep the mobile debris removal and shoveling plate 21 stable in lateral movement, prevent deviation, and ensure that it can maintain correct alignment and stable working state throughout the entire moving range.

[0048] In this embodiment, a T-shaped top beam 20 is fixedly connected between the two T-shaped sliding blocks 24, and a mounting cross plate 23 is connected to the bottom surface of the T-shaped top beam 20. The lifting assembly includes a hydraulic lifting column 28 fixedly installed in the middle position of the bottom surface of the mounting cross plate 23. A connecting end plate portion 27 is integrally formed on the top surface of the mobile impurity removing and shoveling plate 21. The bottom lifting end of the hydraulic lifting column 28 is fixedly connected to the connecting end plate portion 27. Positioning uprights 29 (specific sizes need to be selected according to actual occasions) are symmetrically welded on both sides of the hydraulic lifting column 28 and on the top surface of the connecting end plate portion 27. The positioning uprights 29 longitudinally penetrate the mounting cross plate 23. A slag discharge port 16 is provided on the outer wall of the impurity removing pool 1 facing the sharp shoveling direction of the mobile impurity removing and shoveling plate 21. A slag discharge box 5 is welded on the outer side of the slag discharge port 16 and on the outer wall of the impurity removing and shoveling plate 1. The bottom surface of the slag discharge box 5 has a slag discharge flow channel, and the bottom of the slag discharge port 16 has a slag discharge slope 15 for discharging impurities.

[0049] In this embodiment, the mobile impurity removal scraping plate 21 can reciprocate above the impurity removal screen 19, and the connecting end plate 27 at the top is closely connected to the hydraulic lifting column 28 to ensure smooth movement. During the movement, the mobile impurity removal scraping plate 21 is close to the surface of the impurity removal screen 19, effectively scraping and collecting impurities adhering to the impurity removal screen 19, and then the impurities are sent to the slag discharge port 16 through the lifting action of the hydraulic lifting column 28. This design greatly simplifies the manual cleaning process, improves the impurity removal efficiency, and also reduces the downtime for maintenance.

[0050] In this embodiment, the hydraulic lifting column 28 controls the vertical lifting of the mobile debris removal and shoveling plate 21, which provides a fast and smooth lifting capability, so that the debris removal and shoveling plate 21 can timely approach or move away from the debris removal screen 19 to effectively remove debris or avoid it, thereby increasing the flexibility and applicability of the device. The positioning vertical rod 29 is welded to the top of the connecting end plate 27 and longitudinally passes through the mounting cross plate 23, thereby providing the mobile debris removal and shoveling plate 21 with additional stability in the vertical direction, ensuring that it maintains correct alignment during the lifting process, avoiding deflection, and improving the stability and reliability of the entire system.

[0051] How it works

[0052] In the coal preparation circulating water impurity removal device, the external circulating water pump introduces water into the water inlet pipe 3, which is connected to the rotating sleeve 8 through the sealing bearing 7, ensuring the sealing of the waterway and the smooth rotation of the rotating sleeve 8. The rotating sleeve 8 is provided with a rotating rod 13 and a rotating diverter blade 14. When the water flows into the rotating sleeve 8 through the water inlet pipe 3, it is acted upon by the rotating diverter blades 14 in the rotating sleeve 8, and the water is evenly dispersed under the action of centrifugal force. At the same time, the rotation of the rotating diverter blades 14 also increases the turbulence of the water, which helps to further disperse the impurities. After the water flow is initially dispersed, it is sprayed out from the water inlet holes 10 on the side of the rotating sleeve 8 and the uniform spraying port 11 of the hemispherical head 9, evenly covering the impurity removal screen 19, reducing the direct impact on the impurity removal screen 19;

[0053] The hydraulic lifting column 28 controls the vertical descent of the mobile impurity removal shoveling plate 21, so that the impurity removal shoveling plate 21 can timely abut against the impurity removal screen 19 downward, and the servo motor 17 drives the screw rod 25, and the screw rod 25 drives the T-shaped slider 24 to move along the linear movable guide rail 18. The two T-shaped sliders 24 drive the T-shaped top beam 20 to move linearly. During the movement, the mobile impurity removal shoveling plate 21 is close to the surface of the impurity removal screen 19, effectively scraping and collecting impurities adhering to the impurity removal screen 19, and then the impurities are sent into the slag discharge port 16 through the lifting action of the hydraulic lifting column 28, and enter the slag discharge drop box 5, and finally discharged from the system through the slag discharge channel on the bottom of the slag discharge drop box 5.

[0054] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0055] Although the 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 coal preparation circulating water impurity removal device, comprising a impurity removal water tank (1) for removing impurities from coal preparation circulating water and a water inlet pipe (3) installed on a top cover (2) of the impurity removal water tank (1), wherein a drainage pipe (4) is connected through the bottom surface of the impurity removal water tank (1), and characterized in that: A de-impurity screen (19) is arranged in the inner cavity of the de-impurity water tank (1); The water inlet pipe (3) penetrates into the impurity removal pool (1) and is rotatably mounted at one end thereof with a rotating sleeve (8) for evenly rotating and sprinkling water on the impurity removal screen (19); a hemispherical head (9) is integrally formed at the bottom of the rotating sleeve (8); a plurality of water inlet holes (10) are provided in a circular array on the peripheral outer wall of the rotating sleeve (8); a uniform spraying port (11) is provided at the bottom end of the hemispherical head (9); and a rotating flow-dividing fan blade (14) is provided above the uniform spraying port (11) and in the inner cavity of the hemispherical head (9), which can rotate and evenly distribute the water flow by means of the downward impact force of the water flow and the rotational force of the rotating sleeve (8); A movable impurity removal shoveling plate (21) is provided on the top surface of the impurity removal screen (19) and is located in the impurity removal water pool (1). The movable impurity removal shoveling plate (21) is in frictional contact with the top surface of the impurity removal screen (19) to remove impurities through a lifting component (22).

2. A coal preparation circulating water impurity removal device according to claim 1, characterized in that: The end of the water inlet pipe (3) that penetrates into the impurity removal pool (1) is interference-fitted with a sealing bearing (7) on its circumferential side, and the inner ring of the rotating sleeve (8) is interference-fitted with the outer ring of the sealing bearing (7).

3. A coal preparation circulating water impurity removal device according to claim 2, characterized in that: A rotating rod (13) is rotatably mounted in the inner cavity of the hemispherical head (9), and the rotating flow-dividing blades (14) are symmetrically fixedly mounted on the outer wall of the circumference of the rotating rod (13); The rotating flow-dividing blade (14) is vertically arranged above the uniform spraying port (11).

4. A coal preparation circulating water impurity removal device according to claim 3, characterized in that: Two anti-drop-down pressure rods (12) are symmetrically mounted on the top surface of the rotating sleeve (8) via bolts, and the bottom surfaces of the free ends of the anti-drop-down pressure rods (12) are in frictional contact with the top surface of the sealing bearing (7).

5. A coal preparation circulating water impurity removal device according to claim 4, characterized in that: A linear guide rail (18) is installed on the upper part of the inner wall of one side of the de-impurity water tank (1), and a positioning slide groove is opened on the upper part of the inner wall of the other side. A horizontal T-shaped slider (24) is adapted to be slidably connected in the linear guide rail (18) and the positioning slide groove. A T-shaped top beam (20) is fixedly connected between the two T-shaped sliders (24), and a mounting cross plate (23) is connected to the bottom surface of the T-shaped top beam (20).

6. A coal preparation circulating water impurity removal device according to claim 5, characterized in that: The lifting assembly (22) comprises a hydraulic lifting column (28) fixedly mounted at a middle position of the bottom surface of the mounting transverse plate (23).

7. A coal preparation circulating water impurity removal device according to claim 6, characterized in that: The top surface of the mobile debris-removing and scraping plate (21) is integrally formed with a connecting end plate portion (27), and the bottom lifting end of the hydraulic lifting column (28) is fixedly connected to the connecting end plate portion (27).

8. A coal preparation circulating water impurity removal device according to claim 7, characterized in that: Positioning uprights (29) are symmetrically welded on both sides of the hydraulic lifting column (28) and located on the top surface of the connecting end plate (27), and the positioning uprights (29) penetrate the installation cross plate (23) in the longitudinal direction.

9. A coal preparation circulating water impurity removal device according to claim 8, characterized in that: A slag discharge port (16) is provided on the outer wall of the impurity removal water tank (1) facing the sharp shoveling direction of the movable impurity removal shoveling plate (21), and a slag discharge drop box (5) is welded outside the slag discharge port (16) and located on the outer wall of the impurity removal water tank (1), and a slag discharge flow channel is provided on the bottom surface of the slag discharge drop box (5).

10. A coal preparation circulating water impurity removal device according to claim 9, characterized in that: The bottom of the slag discharge port (16) is provided with a slag discharge slope (15) for discharging impurities.

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