Multistage filtering device for coal mine wastewater treatment

Abstract

The invention discloses a multistage filtering device for coal mine wastewater treatment, and belongs to the technical field of wastewater treatment. Comprising a primary screening mechanism, an adjusting mechanism and a stirring mechanism which are sequentially arranged from top to bottom. Wastewater is filtered through the primary screening mechanism, and the filtered wastewater flows into the adjusting mechanism, enters the stirring mechanism through the adjusting mechanism and is mixed with a flocculating agent in the stirring mechanism; through cooperation of the adjusting mechanism and the stirring mechanism, self-adaptive adjustment can be performed according to the actual turbidity degree of the coal mine wastewater, so that the treatment process is optimized, favorable conditions are better created for subsequent flocculation treatment, and the overall wastewater treatment efficiency and effect are improved; meanwhile, different stirring speeds can be selected according to the turbid degree of the coal mine wastewater, and efficient and high-adaptability stirring support is provided for the wastewater purification process.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a multi-stage filtering device for treating coal mine wastewater. Background Art

[0002] In the process of coal mining and production, a large amount of wastewater is usually generated. These wastewaters contain a large amount of sulfides and nitrides. If they are directly discharged, they will cause damage to the environment. Therefore, wastewater treatment is usually required. In addition to these harmful substances, these wastewaters usually also carry a large amount of heavy metals and inorganic impurities. These impurities need to be filtered before treatment.

[0003] The common treatment method now is to set up a sedimentation tank when treating coal mine wastewater to precipitate these impurities, but the existing treatment method is only to add flocculants for precipitation and then filter treatment, resulting in too many impurities in the coal mine wastewater, large precipitation accumulation, and inconvenience for subsequent solid-liquid separation. In addition, due to the instability of coal mine wastewater, the turbidity of coal mine wastewater generated during coal mining is different, and different doses of flocculants need to be added according to different turbidity standards. At present, there is a lack of effective accelerated mixing operation when adding flocculants, and it is impossible to stir at different speeds according to the different degrees of turbidity pollution. Summary of the invention

[0004] The present invention overcomes the shortcomings of the prior art and proposes a multi-stage filtering device for treating coal mine wastewater; the present invention is achieved through the following technical solutions: A multi-stage filtering device for treating coal mine wastewater comprises a primary screening mechanism, a regulating mechanism and a stirring mechanism arranged in sequence from top to bottom; the wastewater is first filtered by the primary screening mechanism, and the filtered wastewater flows into the regulating mechanism, enters the stirring mechanism through the regulating mechanism, and is mixed with a flocculant in the stirring mechanism; The regulating mechanism comprises a fixed cylinder with an open top, a turbidity detector, a flow guide tube, a connecting rod, a baffle and a push rod motor; the stirring mechanism comprises a sedimentation cylinder with an open top and a stirring rod; The detection rod of the turbidity detector extends into the primary screening mechanism to detect the turbidity of the filtered wastewater; The guide pipe includes a vertical pipe section and an inclined water tank section with an open top. The top of the vertical pipe section is connected to the primary screening mechanism. The filtered wastewater flows down through the vertical pipe section. The vertical pipe section is provided with a drain port, which is located above the inclined water tank section. The lowest water outlet of the inclined water tank section is located at the upper part of the fixed cylinder. The filtered wastewater flows down through the vertical pipe section and flows into the fixed cylinder through the drain port and the inclined water tank section. The output end of the push rod motor is connected to a baffle; the baffle is located at the drain outlet and blocks the drain outlet; the push rod motor drives the baffle to move to partially or completely open the drain outlet and adjust the flow rate of wastewater entering the fixed cylinder; the turbidity detector is electrically connected to the push rod motor through the controller; The fixed cylinder is located above the sedimentation cylinder, a stirring rod is rotatably installed inside the fixed cylinder, and the bottom of the stirring rod extends into the sedimentation cylinder; the outer wall of the stirring rod located in the fixed cylinder is fixedly connected with a rotating blade, and the outer wall of the stirring rod located in the sedimentation cylinder is fixedly connected with stirring support rods in sequence and equidistantly, and the flocculant is placed in the sedimentation cylinder; the filtered wastewater flows into the sedimentation cylinder through the top of the fixed cylinder.

[0005] Furthermore, a multi-stage filtration device for treating coal mine wastewater also includes a partition box, a primary screening mechanism is installed inside the partition box, the primary screening mechanism includes a filter cartridge, a water inlet is opened at the top of the filter cartridge, a rotating rod is rotatably installed inside the filter cartridge, and spiral blades are symmetrically fixedly connected to the outside of the rotating rod; a rotating motor is installed at one end of the filter cartridge, and the output end of the rotating motor passes through the inside of the filter cartridge and is fixedly connected to the rotating rod; a plurality of filter holes are opened on the side and bottom walls of the filter cartridge; the filter cartridge is connected to the inside of the partition box through the filter holes; and the top of the vertical pipe section is connected to the partition box.

[0006] Furthermore, the bottom of the partition box is symmetrically fixedly connected with a guide pipe; the output end of the push rod motor is fixedly connected with a connecting rod, and both ends of the connecting rod are fixedly connected with baffles; the two baffles respectively block the drainage outlets of the vertical pipe sections on the same side.

[0007] Furthermore, a support plate is fixedly connected to the middle of the top of the sedimentation cylinder, and a bracket is fixedly connected to the top of the support plate; a push rod motor is installed on the top of the bracket, and the output end of the push rod motor faces upward and is fixedly connected to a horizontally arranged connecting rod.

[0008] Furthermore, the fixing tube is fixedly arranged in the middle of the support plate, and the fixing tube is located on the inner side of the bracket.

[0009] Furthermore, a discharge pipe is symmetrically fixedly connected inside the bottom end of the partition box, the top of the discharge pipe is connected to the filter cartridge, and a through hole is opened at the connection between the filter cartridge and the discharge pipe.

[0010] Furthermore, the partition box is fixedly connected with support columns on all sides; a recovery box is installed between two support columns on the same side; and the recovery box is located directly below the corresponding discharge pipe.

[0011] Furthermore, a scraper is fixedly connected to one end of the stirring support rod away from the stirring rod; a drain pipe is fixedly connected to the outside of the sedimentation cylinder, and a filter screen is installed inside the drain pipe.

[0012] Furthermore, a turbidity detector is installed on the top of the bracket, and a detection rod of the turbidity detector extends into the partition box.

[0013] Furthermore, a control panel is installed on the outside of the partition box, and the rotating motor and the push rod motor are both electrically controlled and connected by the control panel.

[0014] The beneficial effects of the present invention compared with the prior art are as follows: The present invention can carry out professional preliminary screening and filtering treatment on coal mine wastewater through the cooperation of the filter cylinder, water inlet, rotating rod, spiral blade, filtering hole, partition, discharge pipe, rotating motor and recovery box, effectively filter and separate impurities with larger particles in the wastewater, ensure the smooth progress of the subsequent treatment process and the initial improvement of the overall water quality, and can adaptively adjust according to the actual turbidity degree of the coal mine wastewater through the cooperation of the guide tube, sedimentation cylinder, support plate, push rod motor, connecting rod, baffle, turbidity detector and detection rod, so as to optimize the treatment process, better create favorable conditions for subsequent flocculation treatment, and improve the efficiency and effect of the overall wastewater treatment; different stirring speeds can be selected according to the turbidity degree of the coal mine wastewater through the cooperation of the fixed cylinder, stirring rod, rotating blade, stirring support rod, scraper and drainage pipe, so as to provide efficient and adaptable stirring support for the wastewater purification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the exterior of the partition box of the present invention; Figure 3 It is a structural schematic diagram of the primary screening mechanism of the present invention; Figure 4 It is a structural schematic diagram of the regulating mechanism of the present invention; Figure 5 It is a structural schematic diagram of the stirring mechanism of the present invention.

[0016] In the figure: 1. partition box; 2. support column; 3. filter cylinder; 4. water inlet; 5. rotating rod; 6. spiral blade; 7. filter hole; 8. partition; 9. discharge pipe; 10. recovery box; 11. rotating motor; 12. bracket; 13. guide pipe; 131. vertical pipe section; 132. inclined water tank section; 14. sedimentation cylinder; 15. support plate; 16. push rod motor; 17. connecting rod; 18. baffle; 19. turbidity detector; 20. detection rod; 21. fixed cylinder; 22. stirring rod; 23. rotating blade; 24. stirring support rod; 25. scraper; 26. drain pipe; 27. control panel. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0018] See also Figures 1 to 5 This embodiment provides a multi-stage filtering device for treating coal mine wastewater, comprising: A partition box 1, a primary screening mechanism, an adjustment mechanism and a stirring mechanism; the partition box 1 is fixedly connected with support columns 2 on all sides; A primary screening mechanism is installed inside the partition box 1, and the primary screening mechanism includes a filter cartridge 3. A partition plate 8 is symmetrically fixedly connected inside the partition box 1. The filter cartridge 3 is supported by the partition plate 8, so that the internal structure of the filter cartridge 3 is more stable during operation; a water inlet 4 is provided on the top of the filter cartridge 3, a rotating rod 5 is rotatably installed inside the filter cartridge 3, and a spiral blade 6 is symmetrically fixedly connected to the outer side of the rotating rod 5; a rotating motor 11 is installed at one end of the filter cartridge 3, and the output end of the rotating motor 11 passes through the inside of the filter cartridge 3 and is fixedly connected to the rotating rod 5. A plurality of filter holes 7 are provided on the side and bottom wall of the filter cartridge 3. A discharge pipe 9 is symmetrically fixedly connected inside the bottom end of the partition box 1, and the top of the discharge pipe 9 is connected to the filter cartridge 3, and a through hole is provided at the connection between the filter cartridge 3 and the discharge pipe 9. A recovery box 10 is installed between the two support columns 2 on the same side; the recovery box 10 is located directly below the corresponding discharge pipe 9. The rotating motor 11 is started, and the rotating motor 11 drives the rotating rod 5 and the spiral blade 6 connected thereto to rotate. The spiral blade 6 rotates and cooperates with the filter hole 7 to filter out larger particles in the wastewater and transport them to the discharge pipe 9, and then the debris is discharged to the recovery box 10 through the discharge pipe 9.

[0019] An adjusting mechanism is provided below the partition box 1 , and a stirring mechanism is installed below the adjusting mechanism; the adjusting mechanism includes a fixing cylinder 21 with an open top and a push rod motor 16 ; the stirring mechanism includes a cylindrical sedimentation cylinder 14 .

[0020] The top of the sedimentation cylinder 14 is an open structure, and a support plate 15 is fixedly connected to the middle of the top of the sedimentation cylinder 14, and the top of the support plate 15 is fixedly connected to the bracket 12; a push rod motor 16 is installed on the top of the bracket 12, and the output end of the push rod motor 16 faces upward and is fixedly connected to a horizontally arranged connecting rod 17, and baffles 18 are fixedly connected to both ends of the connecting rod 17; a turbidity detector 19 is also installed on the top of the bracket 12, and a detection rod 20 is installed on the top of the turbidity detector 19, and the detection rod 20 extends into the partition box 1.

[0021] The bottom of the partition box 1 is symmetrically fixedly connected with a guide pipe 13; the guide pipe 13 is an L-shaped structure, including a connected vertical pipe section 131 and an inclined trough section 132 with an open top, the top of the vertical pipe section 131 is connected to the inner wall of the partition box 1, and the inner side wall of the vertical pipe section 131 is provided with a drain outlet, and the drain outlet is located above the inclined trough section 132; the baffle 18 is located at the drain outlet of the vertical pipe section 131, and when the output end of the push rod motor 16 is at the bottom, the baffle 18 completely blocks the drain outlet.

[0022] The fixed cylinder 21 is fixedly arranged in the middle of the support plate 15, and the fixed cylinder 21 is located on the inner side of the bracket 12; the lowest water outlet of the inclined water tank section 132 is located on the upper part of the fixed cylinder 21; a stirring rod 22 is rotatably installed inside the fixed cylinder 21, and the bottom of the stirring rod 22 extends into the sedimentation cylinder 14. The outer wall of the stirring rod 22 located in the fixed cylinder 21 is fixedly connected with a rotating blade 23, and the outer wall of the stirring rod 22 located in the sedimentation cylinder 14 is fixedly connected with stirring support rods 24 at equal intervals in sequence, and the other end of the stirring support rod 24 is fixedly connected with a scraper 25.

[0023] The turbidity detector 19 detects the turbidity of the wastewater inside the partition box 1 according to the detection rod 20, and transmits the information to the push rod motor 16 through the controller. At this time, the push rod motor 16 is running, and the push rod motor 16 drives the baffle 18 to lift up through the connecting rod 17, and the drain outlet is opened. The wastewater after filtering in the partition box 1 flows from the drain outlet into the inclined water tank section 132 through the vertical pipe section 131 of the guide pipe 13, and then flows into the fixed cylinder 21 through the inclined water tank section 132; when the wastewater flows into the fixed cylinder 21, it impacts the rotating blades 23 to drive the rotating blades 23 to rotate, and the rotation of the rotating blades 23 drives the stirring rod 22 and the stirring support rod 24 to rotate. Flocculant is contained in the sedimentation cylinder 14, and the wastewater flows into the sedimentation cylinder 14 from the top of the sedimentation cylinder 14 through the fixed cylinder 21. The rotation of the stirring support rod 24 accelerates the mixing of the flocculant and the wastewater.

[0024] The lifting range of the baffle 18 plays a role in regulating the flow rate of wastewater; when the turbidity detector 19 detects that the turbidity of the wastewater is high, the extension length of the output end of the push rod motor 16 increases, and then the lifting range of the baffle 18 increases, the degree of opening of the drain port of the vertical pipe section 131 increases, and the wastewater flow rate increases. At this time, the rotating blade 23 increases its speed under the drive of the large flow of wastewater, and then the speed of the stirring support rod 24 increases. The rotation of the stirring support rod 24 accelerates the mixing of the flocculant and the wastewater, and the rapid stirring allows the flocculant to be quickly and evenly dispersed to the wastewater. In the water, it is ensured that the flocculant and the wastewater can fully contact; on the contrary, when the turbidity detector 19 detects that the turbidity of the wastewater is low, the extension length of the output end of the push rod motor 16 is reduced, and then the lifting amplitude of the baffle 18 is reduced, then the degree of opening of the drain outlet of the vertical pipe section 131 is reduced, and the wastewater flow rate is reduced. At this time, the speed of the rotating blade 23 is reduced, and then the speed of the stirring support rod 24 is reduced. Slow stirring can ensure that the suspended matter in the wastewater has enough time to aggregate and form larger flocs, and reduce the stirring speed to maintain the stability of the flocculent.

[0025] A drainage pipe 26 is fixedly connected to the outside of the sedimentation cylinder 14 , and a filter screen is installed inside the drainage pipe 26 .

[0026] A control panel 27 is installed on the outer side of the partition box 1 , and the rotating motor 11 and the push rod motor 16 are both electrically controlled and connected by the control panel 27 .

[0027] This embodiment proposes a multi-stage filtration device for treating coal mine wastewater. The working principle is: When the device is needed, first inject the waste water into the filter cartridge 3 through the water inlet 4, then start the rotating motor 11, the rotating motor 11 drives the spiral blade 6 to rotate, the spiral blade 6 rotates and cooperates with the filter hole 7 to filter out the larger particles in the waste water, and transport them to the discharge pipe 9, and then discharge the debris into the recovery box 10 through the discharge pipe 9, and the filtered waste water enters the separation box 1 through the filter hole 7; at the same time, the turbidity detector 19 detects the turbidity of the waste water in the separation box 1 according to the detection rod 20, and transmits the information to the push rod motor 16. At this time, the push rod motor 16 is According to the turbidity, the corresponding operating power is provided, and the push rod motor 16 drives the baffle 18 to lift up through the connecting rod 17, and partially or completely opens the drain port of the vertical pipe section 131; the filtered wastewater in the partition box 1 flows into the inclined water tank section 132 through the drain port, and then flows into the fixed cylinder 21; then flows into the sedimentation cylinder 14 through the top of the fixed cylinder 21; when the wastewater flows into the fixed cylinder 21, it impacts the rotating blades 23 to drive the rotating blades 23 to rotate, and the rotation of the rotating blades 23 drives the stirring rod 22 and the stirring support rod 24 to rotate, and the rotation of the stirring support rod 24 accelerates the mixing of the flocculant and the wastewater.

[0028] The baffle 18 plays the role of regulating the flow of wastewater. When the turbidity of the wastewater is high, the lifting amplitude of the baffle 18 increases, the opening amplitude of the drain port increases, the wastewater flow increases, and the rotation speed of the stirring support rod 24 increases accordingly; rapid stirring allows the flocculant to be quickly and evenly dispersed into the wastewater to ensure that the agent and the wastewater can fully contact. Highly turbid wastewater often contains a large number of tiny particles that are difficult to settle. Rapid stirring can more effectively promote the aggregation of these particles, thereby achieving the best flocculation effect.

[0029] When the turbidity of the wastewater is low, the lifting amplitude of the baffle 18 is reduced, the opening amplitude of the drain outlet is reduced, the wastewater flow rate is reduced, and the rotation speed of the stirring support rod 24 is correspondingly reduced; the suspended matter content in the wastewater with low turbidity is relatively small, and slow stirring can ensure that these suspended matter have enough time to aggregate and form larger flocs, and reduce the stirring speed to maintain the stability of the flocs and prevent them from being broken up due to excessive stirring, thereby facilitating subsequent sedimentation and separation operations.

[0030] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A multi-stage filtration device for treating coal mine wastewater, characterized in that: It includes a primary screening mechanism, a regulating mechanism and a stirring mechanism arranged in sequence from top to bottom; the wastewater is first filtered by the primary screening mechanism, and the filtered wastewater flows into the regulating mechanism, and then enters the stirring mechanism through the regulating mechanism to be mixed with the flocculant in the stirring mechanism; The regulating mechanism comprises a fixing cylinder (21) with an open top, a turbidity detector (19), a flow guide tube (13), a connecting rod (17), a baffle (18) and a push rod motor (16); the stirring mechanism comprises a sedimentation cylinder (14) with an open top and a stirring rod (22); The detection rod (20) of the turbidity detector (19) extends into the primary screening mechanism to detect the turbidity of the filtered wastewater; The flow guide pipe (13) comprises a vertical pipe section (131) and an inclined water tank section (132) with an open top. The top of the vertical pipe section (131) is connected to the primary screening mechanism. The vertical pipe section (131) is provided with a drainage port, which is located above the inclined water tank section (132). The lowest water outlet of the inclined water tank section (132) is located above the fixed cylinder (21). The filtered wastewater flows down through the vertical pipe section (131) and flows into the fixed cylinder (21) through the drainage port and the inclined water tank section (132). The output end of the push rod motor (16) is connected to a baffle (18); the baffle (18) is located at the drain outlet and blocks the drain outlet; the baffle (18) is driven by the push rod motor (16) to move so as to partially or completely open the drain outlet and adjust the flow rate of wastewater entering the fixed cylinder (21); the turbidity detector (19) is electrically connected to the push rod motor (16) via a controller; The fixed cylinder (21) is located above the sedimentation cylinder (14); a stirring rod (22) is rotatably mounted inside the fixed cylinder (21), and the bottom of the stirring rod (22) extends into the sedimentation cylinder (14); a rotating blade (23) is fixedly connected to the outer wall of the stirring rod (22) located in the fixed cylinder (21); stirring support rods (24) are fixedly connected to the outer wall of the stirring rod (22) located in the sedimentation cylinder (14) at equal intervals; the flocculant is placed in the sedimentation cylinder (14), and the filtered wastewater flows into the sedimentation cylinder (14) through the top of the fixed cylinder (21).

2. A multi-stage filtration device for treating coal mine wastewater according to claim 1, characterized in that: It also comprises a partition box (1), wherein the partition box (1) is internally installed with the aforementioned primary screening mechanism, wherein the primary screening mechanism comprises a filter cartridge (3), wherein a water inlet (4) is provided at the top of the filter cartridge (3), wherein a rotating rod (5) is rotatably installed inside the filter cartridge (3), wherein the outer side of the rotating rod (5) is symmetrically and fixedly connected with a spiral blade (6); a rotating motor (11) is installed at one end of the filter cartridge (3), and the output end of the rotating motor (11) passes through the inside of the filter cartridge (3) and is fixedly connected with the rotating rod (5); a plurality of filtering holes (7) are provided on the side and bottom wall of the filter cartridge (3); the filter cartridge (3) is connected to the inside of the partition box (1) through the filtering holes (7); and the top of the vertical pipe section (131) is connected to the partition box (1).

3. A multi-stage filtration device for treating coal mine wastewater according to claim 2, characterized in that: The bottom of the partition box (1) is symmetrically fixedly connected to a flow guide pipe (13); the output end of the push rod motor (16) is fixedly connected to a connecting rod (17), and both ends of the connecting rod (17) are fixedly connected to baffles (18); the two baffles (18) respectively block the drainage outlets of the vertical pipe sections (131) on the same side.

4. A multi-stage filtration device for treating coal mine wastewater according to claim 3, characterized in that: A support plate (15) is fixedly connected to the middle of the top of the sedimentation cylinder (14), and a bracket (12) is fixedly connected to the top of the support plate (15); a push rod motor (16) is installed on the top of the bracket (12), and the output end of the push rod motor (16) faces upward and is fixedly connected to a horizontally arranged connecting rod (17).

5. A multi-stage filtration device for treating coal mine wastewater according to claim 4, characterized in that: The fixing tube (21) is fixedly arranged in the middle of the support plate (15), and the fixing tube (21) is located on the inner side of the bracket (12).

6. A multi-stage filtration device for treating coal mine wastewater according to claim 2, characterized in that: A discharge pipe (9) is symmetrically and fixedly connected to the bottom of the partition box (1); the top of the discharge pipe (9) is connected to the filter cartridge (3); and a through hole is provided at the connection between the filter cartridge (3) and the discharge pipe (9).

7. A multi-stage filtration device for treating coal mine wastewater according to claim 6, characterized in that: The partition box (1) is fixedly connected to support columns (2) on all sides; a recovery box (10) is installed between two support columns (2) on the same side; and the recovery box (10) is located directly below the corresponding discharge pipe (9).

8. A multi-stage filtration device for treating coal mine wastewater according to claim 1, characterized in that: A scraper (25) is fixedly connected to one end of the stirring support rod (24) away from the stirring rod (22); a drainage pipe (26) is fixedly connected to the outside of the sedimentation cylinder (14), and a filter screen is installed inside the drainage pipe (26).

9. A multi-stage filtration device for treating coal mine wastewater according to claim 4, characterized in that: The turbidity detector (19) is mounted on the top of the bracket (12), and the detection rod (20) of the turbidity detector (19) extends into the partition box (1).

10. A multi-stage filtration device for treating coal mine wastewater according to claim 2, characterized in that: A control panel (27) is installed on the outside of the partition box (1), and the rotating motor (11) and the push rod motor (16) are both electrically controlled and connected by the control panel (27).

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