A smart coagulation treatment device for coal mine wastewater

Abstract

This invention discloses an intelligent coagulation treatment device for coal mine wastewater, particularly relating to the field of coal mine wastewater mixing technology. It includes a treatment tank body, with two identical liquid mixing devices installed between the outer side of the treatment tank body and the interiors of the PAC and PAM dosing chambers. A feeding assembly for assisting sediment transport is installed on the inner side of the sedimentation chamber. The advantages of this invention are: precise mixing of PAC and PAM solutions with coal mine wastewater is achieved through the coordinated operation of a liquid supply pump, a third connecting pipe, a second one-way valve, a two-inlet-one-outlet connecting platform, a second connecting pipe, a solenoid valve group, a first connecting pipe, a first one-way valve, a first bidirectional pipe, and a hollow stirring roller; further acceleration of the mixing process by the coordinated operation of an air supply pump group, a fifth connecting pipe, an air pump, a fourth connecting pipe, a third one-way valve, the stirring roller, and a circulation cylinder; and improved uniformity of contact between the solutions and wastewater, avoiding problems such as excessively high local concentrations or insufficient mixing.

Description

Technical Field

[0001] This invention relates to the field of coal mine wastewater mixing technology, and in particular to an intelligent coagulation treatment device for coal mine wastewater. Background Technology

[0002] With the continuous development of coal mining and coal washing operations, coal mine wastewater usually contains a large amount of coal slime particles, suspended solids, colloidal impurities, and some inorganic salts. If discharged directly without effective treatment, it will not only cause water turbidity and pipe blockage, but also affect the stable operation of the mine's circulating water system. Coagulation and sedimentation is a commonly used treatment method in coal mine wastewater treatment. By adding PAC and PAM solutions to coal mine wastewater, the suspended particles in the wastewater are first destabilized to form small flocs, and then larger flocs are formed through coagulation. Finally, the wastewater is purified by sedimentation and separation.

[0003] The existing coagulation treatment equipment for coal mine wastewater treatment mainly consists of a treatment tank body, a PAC dosing area, a mixing area, a PAM dosing area, a sedimentation area, a stirring mechanism, dosing pipelines, a sensing and detection structure, and a sludge discharge structure. The treatment tank body is used to continuously treat coal mine wastewater. The PAC dosing area is used to add PAC solution to destabilize suspended particles in the wastewater. The mixing area is used to agitate the wastewater and the chemical solution using the stirring mechanism. The PAM dosing area is used to add PAM solution, causing fine flocs to form larger flocs through bridging. The sedimentation area is used to allow floc impurities to settle and separate under gravity. The dosing pipelines are used to transport PAC or PAM solution to the corresponding treatment area. The sensing and detection structure is used to detect wastewater flow rate, level, pH value, and turbidity. The sludge discharge structure is used to discharge sludge or floc impurities from the sedimentation area.

[0004] While the aforementioned structure can meet the basic treatment requirements of coagulation and sedimentation for coal mine wastewater, existing chemical solutions typically enter the wastewater through a fixed dosing port or a single pipeline. This leads to the chemical solution being concentrated in localized areas, making it difficult to diffuse to different heights and locations in a timely manner. This results in uneven contact between the PAC or PAM solutions and the coal mine wastewater, easily causing problems such as excessively high or insufficient chemical concentrations in some areas, or uneven floc formation. Furthermore, existing mixing methods rely heavily on mechanical stirring, lacking bubble agitation and circulation flow assistance. This results in insufficient agitation, diffusion, and circulation between the wastewater and the chemical solution, limiting mixing efficiency. Simultaneously, the settled floc impurities tend to accumulate at the bottom of the sedimentation area or near the discharge outlet. Without continuous scraping and spiral conveying structures, these impurities can easily clog the discharge channels, reducing cleaning and discharge efficiency and affecting the continuous operation of the device. Therefore, improvements are needed to address these issues. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an intelligent coagulation treatment device for coal mine wastewater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an intelligent coagulation treatment device for coal mine wastewater, comprising a treatment tank body, which sequentially includes a PAC dosing chamber, a mixing chamber, a PAM dosing chamber, and a sedimentation chamber. The sedimentation chamber has a hollow conical platform on its inner side, an overflow plate above its inner side, and an outlet platform connected to its rear end. The PAC dosing chamber has an inlet platform connected to one side above its rear end. A standing platform is horizontally positioned on the top surface of the treatment tank body. A first motor with its output shaft located inside the PAC and PAM dosing chambers, and a second and third motor located inside the mixing and sedimentation chambers are vertically mounted sequentially on the top surface of the standing platform. The output shafts of the first, second, and third motors are vertically connected via couplings to an outer impeller-equipped stirring roller, a mixing roller, and a cleaning roller, respectively. The stirring rollers are hollow, and a circulation cylinder is sleeved on the outer side of each of the two stirring rollers. Two sets of identical liquid mixing devices are installed between the outer side of the treatment tank body and the interiors of the PAC and PAM dosing chambers. A feeding assembly for assisting in the transport of sediment is installed inside the sedimentation chamber.

[0007] Preferably, the liquid mixing device includes multiple first bidirectional pipes that are equidistantly and vertically installed on the outer side of the rear end of the stirring roller. Each of the multiple first bidirectional pipes is equipped with a first one-way valve at its other end. Each of the multiple first one-way valves is equipped with a multiple first connecting pipe at its other end. The one-way ends of the multiple first one-way valves face the first connecting pipes. Each of the multiple first connecting pipes is connected to a switching platform fixed inside the main body of the treatment tank. The switching platform is equipped with multiple solenoid valve groups adapted to the first connecting pipes. The solenoid valve groups are sequentially provided with a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve.

[0008] Preferably, a second connecting pipe is installed at the other end of the solenoid valve assembly, and the other ends of multiple second connecting pipes are connected to a two-inlet-one-outlet connecting platform fixed on the top surface of the treatment tank body. The first inlet end of the two-inlet-one-outlet connecting platform is connected to a second bidirectional pipe, the other end of the second bidirectional pipe is connected to a second one-way valve, the other end of the second one-way valve is connected to a third connecting pipe, and the one-way end of the second one-way valve faces the third connecting pipe. The other end of the third connecting pipe is connected to a liquid supply pump whose outlet end is connected to an external PAC storage tank.

[0009] Preferably, the second inlet end of the two-inlet-one-outlet connecting platform is connected to a third bidirectional pipe, the other end of the third bidirectional pipe is connected to a third one-way valve, the other end of the third one-way valve is connected to a fourth connecting pipe, and the one-way end of the third one-way valve faces the fourth connecting pipe, and the other end of the fourth connecting pipe is connected to an air pump.

[0010] Preferably, a fourth bidirectional pipe is connected to one side of the vertical end of each of the first connecting pipes, a fourth one-way valve is installed at the other end of each of the fourth bidirectional pipes, a fifth connecting pipe is installed at the other end of each of the fourth one-way valves, and an air supply pump group is installed at the other end of each of the fifth connecting pipes on the outside of the main body of the treatment tank. The air supply pump group is provided with a first air supply pump, a second air supply pump, a third air supply pump and a fourth air supply pump in sequence.

[0011] Preferably, the outer side of the stirring roller is integrally formed from top to bottom with a recessed platform corresponding to the first bidirectional tube and facing inward. The inner top and inner bottom surfaces of the recessed platform are both equipped with sealed bearings, and multiple connecting grooves connecting the hollow structure of the stirring roller are equidistantly opened on the outer side of the recessed platform. The outer sides of the two sealed bearings are provided with positioning platforms that fit against the outer wall of the stirring roller. The rear end of the positioning platform is connected to a connecting platform that connects to the corresponding first bidirectional tube, and multiple connecting holes are equidistantly opened on the outer impeller of the stirring roller.

[0012] Preferably, a connecting plate and a conical limiting platform are respectively installed on both sides of the inner cavity of the first one-way valve, the second one-way valve, the third one-way valve and the fourth one-way valve. A one-way ball is provided on the inner side of the conical limiting platform, and a spring is installed between the one-way ball and the connecting plate.

[0013] Preferably, the feeding assembly includes a drain pipe installed on the hollow bottom surface of the conical platform, the cleaning end of the cleaning roller is in contact with the inner side of the conical platform, and a first spiral roller with a conical structure and placed inside the vertical end of the drain pipe is sleeved on the outer side below the cleaning roller. A manual-electric integrated valve is installed at one end of the drain pipe, and a second spiral roller is rotatably connected to the inner side of the longitudinal end of the drain pipe. One end of the second spiral roller passes through the drain pipe and is connected to a drive motor placed on the bottom side of the sedimentation chamber via a coupling.

[0014] Preferably, a flow meter is installed on one side of the liquid inlet platform, and a liquid level sensor and a pH sensor are vertically installed on both sides of the front wall of the PAC dosing chamber, the mixing chamber, and the PAM dosing chamber, respectively, and a turbidity sensor is installed below the front wall and above the rear wall of the inner cavity.

[0015] Preferably, a circulation pump is installed at the rear end of the main body of the treatment tank and placed outside the mixing chamber. The inlet end of the circulation pump is connected to a first circulation pipe, the other end of the first circulation pipe is connected to the lower part of the mixing chamber, and the outlet end of the circulation pump is connected to a second circulation pipe, the other end of the second circulation pipe is connected to the upper part of the PAC dosing chamber.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention utilizes a liquid supply pump, a third connecting pipe, a second one-way valve, a two-inlet-one-outlet connecting platform, a second connecting pipe, a solenoid valve group, a first connecting pipe, a first one-way valve, a first two-way pipe, and a hollow stirring roller to achieve precise mixing of PAC and PAM solutions with coal mine wastewater. The liquid supply pump delivers PAC or PAM solutions along the corresponding pipelines to the inner cavity of the stirring roller, and then disperses them into the PAC or PAM dosing chamber through the connecting holes on the impeller on the outer side of the stirring roller. This ensures that the solutions do not enter the wastewater from a single fixed position, but are released at different heights and circumferential positions as the stirring roller rotates. Simultaneously, the solenoid valve group can control the opening and closing of different first connecting pipes, allowing the solutions to enter the stirring roller individually, entirely, or alternately. This adjusts the solution addition position according to the coal mine wastewater treatment situation, improves the uniformity of contact between the solutions and wastewater, and avoids problems such as excessively high local concentrations or insufficient mixing.

[0018] 2. This invention utilizes an air supply pump unit, a fifth connecting pipe, a fourth one-way valve, an air pump, a fourth connecting pipe, a third one-way valve, a two-inlet-one-outlet connecting platform, a stirring roller, and a circulation cylinder to further accelerate the mixing process of the chemical solution and coal mine wastewater. When the chemical supply pump delivers the chemical solution, the air supply pump unit can inject air into the corresponding stirring roller through the fifth connecting pipe, the fourth one-way valve, and the first connecting pipe. This air enters the wastewater through the connecting holes on the stirring roller impeller, creating bubble disturbance. The rising and diffusion of these bubbles causes localized agitation between the wastewater and the chemical solution. This system improves the diffusion rate of the chemical solution in wastewater. Simultaneously, the air pump can input air into the corresponding pipelines through the fourth connecting pipe, the third one-way valve, and the two-inlet-one-outlet connecting platform, assisting in the liquid agitation within the PAC or PAM dosing chamber. A circulating mixing channel is formed between the circulating cylinder sleeved on the outside of the stirring roller and the stirring roller itself. This allows the rotating stirring roller to drive the wastewater and chemical solution to circulate along the inside and outside of the circulating cylinder, thus combining bubble agitation, mechanical stirring, and circulating flow to improve the mixing efficiency between PAC and PAM solutions and coal mine wastewater.

[0019] 3. This invention achieves efficient cleaning and discharge of precipitated impurities through the coordinated operation of a conical platform, a cleaning roller, a first spiral roller, a second spiral roller, a manual-electric integrated valve, and a drive motor. After coal mine wastewater treated with PAC and PAM solutions enters the sedimentation chamber, the larger flocs formed settle to the surface of the conical platform under gravity. The hollow structure of the conical platform facilitates the collection of sediment towards the bottom discharge point. When the third motor drives the cleaning roller to rotate, it scrapes the precipitated impurities on the inner surface of the conical platform and pushes them to the discharge pipe at the bottom of the platform. The first spiral roller rotates with the cleaning roller and conveys the impurities downwards in the vertical section of the discharge pipe. The drive motor drives the second spiral roller to rotate and further convey the impurities outwards in the longitudinal section of the discharge pipe. Combined with the manual-electric integrated valve controlling the opening and closing of the discharge pipe, this reduces the accumulation and blockage of precipitated impurities at the bottom of the conical platform and in the discharge pipe, improving the cleaning efficiency and continuous discharge capacity.

[0020] 4. The present invention features a closed-loop water reflux function, resulting in high wastewater treatment precision. The invention is equipped with a circulating pump and multiple sets of circulating pipelines in the mixing chamber. A turbidity sensor detects the turbidity difference between the upper and lower layers of the mixed water in real time, accurately determining the mixing state of the chemical solution and the floc formation status. For water that fails to meet mixing standards, it can be automatically returned to the PAC dosing chamber for reprocessing, preventing substandard wastewater from entering subsequent processes. This effectively avoids incomplete wastewater treatment caused by insufficient chemical dosing or inadequate mixing, ensuring stable effluent quality and improving the overall wastewater treatment pass rate.

[0021] 5. The present invention features a high degree of intelligence, enabling fully automated and precise control. It utilizes multiple sensors, including flow meters, level sensors, pH sensors, and turbidity sensors, to collect real-time data on wastewater inflow, level, pH, and turbidity. Through a control box, the entire system is intelligently linked and controlled, completely abandoning the traditional, fixed-ratio, extensive treatment method. The dosage of PAC and PAM solutions can be dynamically adjusted in real-time according to the quality and quantity of coal mine wastewater. Simultaneously, the on / off states of each valve in the solenoid valve group can be intelligently switched to achieve layered, multi-point dosing of the solutions, and the corresponding air supply pump group can be linked to complete alternating gas-liquid disturbances, adaptively matching different wastewater conditions. Furthermore, the entire process—dosing, mixing, flocculation, sedimentation, discharge, and recirculation—is automated and closed-loop, requiring no real-time manual intervention. This precisely avoids problems of insufficient or excessive waste of solutions, reducing chemical usage costs, and significantly reducing manual operation costs, truly achieving intelligent, precise, and efficient operation of coal mine wastewater coagulation treatment. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the PAC dosing chamber, mixing chamber, and PAM dosing chamber of the present invention;

[0025] Figure 3 This is a partial structural schematic diagram of the present invention;

[0026] Figure 4 This is a partial cross-sectional view of the structure of the present invention;

[0027] Figure 5 This is a partial sectional view of the overall structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the wastewater treatment flow direction according to the present invention;

[0029] Figure 7 This is a schematic diagram showing the liquid flow direction of the stirring roller and circulation cylinder in this invention;

[0030] Figure 8 For the present invention Figure 3 Enlarged diagram of part A in the middle;

[0031] Figure 9 For the present invention Figure 4 Enlarged diagram of section B;

[0032] Figure 10 For the present invention Figure 5 Enlarged diagram of section C.

[0033] The diagram shows the following components: 1. Treatment tank main body; 2. PAC dosing chamber; 3. Mixing chamber; 4. PAM dosing chamber; 5. Sedimentation chamber; 6. Conical platform; 7. Inlet platform; 8. Standing platform; 9. First motor; 10. Second motor; 11. Third motor; 12. Cleaning roller; 13. Stirring roller; 14. Mixing roller; 15. Circulation cylinder; 16. First check valve; 17. First connecting pipe; 18. Switching platform; 19. Solenoid valve assembly; 20. Second connecting pipe; 21. Two-inlet-one-outlet connection platform; 22. Second check valve; 23. Third connecting pipe; 4. Liquid supply pump; 25. Third check valve; 26. Fourth connecting pipe; 27. Air pump; 28. Air supply pump set; 29. ​​Fifth connecting pipe; 30. Fourth check valve; 31. Sealed bearing; 32. Connecting groove; 33. Positioning platform; 34. Connecting plate; 35. Conical limiting platform; 36. One-way ball; 37. Spring; 38. First spiral roller; 39. Second spiral roller; 40. Manual-electric integrated valve; 41. Drive motor; 42. Circulation pump; 43. Liquid level sensor; 44. pH sensor; 45. Turbidity sensor; 46. Flow meter. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Example 1: See Figures 1 to 10The present invention includes a treatment tank body 1, which is used to carry out the dosing, mixing, coagulation, sedimentation and discharge processes of coal mine wastewater. The outer side of the treatment tank body 1 is equipped with supporting structures such as a PAC storage tank, a PAM storage tank, a collection tank and a collection box. A control box is also located on the outer side of the treatment tank body 1. The control box is electrically connected to a first motor 9, a second motor 10, a third motor 11, a liquid supply pump 24, an air pump 27, an air supply pump group 28, a circulation pump 42, a drive motor 41, a liquid level sensor 43, a pH sensor 44, a turbidity sensor 45 and a flow meter 46, and is used to control the flow based on the influent flow rate, liquid level, pH value and turbidity of the coal mine wastewater. Each actuator operates; the main body of the treatment tank 1, along the flow direction of the coal mine wastewater, is sequentially equipped with a PAC dosing chamber 2, a mixing chamber 3, a PAM dosing chamber 4, and a sedimentation chamber 5. The PAC dosing chamber 2 is used to add PAC solution to the coal mine wastewater, causing suspended particles to destabilize and form fine flocs. The mixing chamber 3 is used to further agitate the PAC-treated coal mine wastewater, ensuring sufficient contact between the PAC solution and the wastewater. The PAM dosing chamber 4 is used to add PAM solution, allowing the PAM solution to bridge the fine flocs and form larger flocs. The sedimentation chamber 5 allows the formed floc impurities to settle and separate under gravity. An inlet platform 7 is connected to the upper side of the rear end of chamber 2. The inlet platform 7 is used to introduce external coal mine wastewater into PAC dosing chamber 2. A flow meter 46 is installed on one side of the inlet platform 7. The flow meter 46 is used to detect the flow rate of coal mine wastewater entering the main body of treatment tank 1, so that the control box can control the dosage of PAC and PAM solutions according to the influent flow rate, avoiding the problem of insufficient or excessive solutions due to fixed dosing ratios. A standing platform 8 is horizontally provided on the top surface of the main body of treatment tank 1. The standing platform 8 is used for technicians to stand and inspect and observe the operating status inside the main body of treatment tank 1. The first motor 9, the second motor 10, and the third motor 11 are installed sequentially on the top surface of the standing platform 8. The output shafts of the first motor 9 are respectively placed in the PAC dosing chamber 2 and the PAM dosing chamber 4, the output shaft of the second motor 10 is placed in the mixing chamber 3, and the output shaft of the third motor 11 is placed in the sedimentation chamber 5. The output shafts of the first motor 9, the second motor 10 and the third motor 11 are respectively connected to the stirring roller 13, the mixing roller 14 and the cleaning roller 12 through the coupling. The stirring roller 13 is equipped with an impeller on its outer side. The mixing roller 14 is used to stir the coal mine wastewater in the mixing chamber 3. The cleaning roller 12 is used to scrape the alum floc impurities deposited on the surface of the conical platform 6 in the sedimentation chamber 5. Both stirring rollers 13 are hollow structures, and both stirring rollers 13 are fitted with a circulation cylinder 15 on their outer side.A circulating mixing channel is formed between the circulating cylinder 15 and the stirring roller 13, so that when the stirring roller 13 rotates, it can drive the liquid in the PAC dosing chamber 2 or PAM dosing chamber 4 to form a local circulating flow, thereby improving the mixing efficiency between the PAC or PAM solution and the coal mine wastewater. Multiple connecting holes are equidistantly opened on the impeller on the outer side of the stirring roller 13. These connecting holes are connected to the hollow inner cavity of the stirring roller 13, allowing the solution to enter the impeller through the inner cavity of the stirring roller 13 and then be sprayed out through the connecting holes, thus achieving dispersed dosing of the solution during the rotation of the stirring roller 13. A hollow conical platform 6 is provided inside the sedimentation chamber 5, which is used to receive and collect the alum floc impurities that settle inside the sedimentation chamber 5. An overflow plate is provided above the inner side of the sedimentation chamber 5, which is used to allow the supernatant after sedimentation to flow along its surface. The upper edge evenly enters the clear water collection area, reducing the probability of excessive local flow velocity at the outlet causing alum floc to be carried out and maintaining a relatively stable water level in the sedimentation chamber 5; the rear end of the sedimentation chamber 5 is connected to an outlet platform, which is used to discharge the treated clean liquid, and a collection box is provided on the outside of the outlet platform; two sets of identical liquid mixing devices are installed on the outside of the treatment tank body 1 and between the PAC dosing chamber 2 and the PAM dosing chamber 4 respectively; the liquid mixing device located on the outside of the PAC dosing chamber 2 is used to introduce PAC solution, and the liquid mixing device located on the outside of the PAM dosing chamber 4 is used to introduce PAM solution; a feeding assembly is installed on the inside of the sedimentation chamber 5, which is used to assist in the discharge of sediment and reduce the accumulation of alum floc impurities at the bottom of the conical platform 6, causing blockage.

[0036] Example 2: The technical solution is basically the same as that of Example 1, except that, as Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, the liquid mixing device includes multiple first bidirectional pipes, a first one-way valve 16, a first connecting pipe 17, a switching platform 18, a solenoid valve group 19, a second connecting pipe 20, a two-inlet-one-outlet connection platform 21, a second one-way valve 22, a third connecting pipe 23, a liquid supply pump 24, a third one-way valve 25, a fourth connecting pipe 26, an air pump 27, an air supply pump group 28, a fifth connecting pipe 29, and a fourth one-way valve 30. Multiple first bidirectional pipes are equidistantly installed vertically on the outer side of the rear end of the stirring roller 13. One end of each of the multiple first bidirectional pipes is connected to the inner cavity of the stirring roller 13, and the other end of each of the multiple first bidirectional pipes is equipped with a first one-way valve 16. The first one-way valve 16 is configured to allow the liquid to flow from the first connecting pipe 17 to the inner cavity of the stirring roller 13, and to prevent... The liquid medicine in the stirring roller 13 flows back into the first connecting pipe 17, thus maintaining the unidirectional delivery of the liquid medicine. Multiple first one-way valves 16 are connected to multiple first connecting pipes 17, and the other ends of the multiple first connecting pipes 17 are all connected to a switching platform 18. The switching platform 18 is fixedly installed inside the treatment tank body 1, and is used to position and install the first connecting pipes 17 and the solenoid valve assembly 19. The switching platform 18 is equipped with solenoid valve assemblies 19 corresponding to the multiple first connecting pipes 17. Each solenoid valve assembly 19 includes a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve. These valves control the opening and closing of the corresponding first connecting pipes 17, allowing the liquid medicine to be delivered in a unidirectional manner. Individually, entirely, or alternately, the liquid enters different height positions of the stirring roller 13; the inlet end of the solenoid valve assembly 19 is connected to a second connecting pipe 20, and the other end of the second connecting pipe 20 is connected to a two-inlet-one-outlet connecting platform 21 fixed on the top surface of the treatment tank body 1; the two-inlet-one-outlet connecting platform 21 has two inlets and one outlet, used to receive liquid medicine and gas respectively, and guide the liquid medicine or gas to the second connecting pipe 20; the first inlet end of the two-inlet-one-outlet connecting platform 21 is connected to a second bidirectional pipe, the other end of the second bidirectional pipe is connected to a second one-way valve 22, the other end of the second one-way valve 22 is connected to a third connecting pipe 23, the other end of the third connecting pipe 23 is connected to the outlet end of the liquid supply pump 24, and the inlet end of the liquid supply pump 24 is connected to an external PAC storage tank or P AM storage tank connection; the second one-way valve 22 is configured to allow the liquid to flow from the third connecting pipe 23 to the two-inlet-one-outlet connecting platform 21, and prevent the liquid in the two-inlet-one-outlet connecting platform 21 from flowing back to the supply pump 24 side; during operation, the flow path of PAC liquid is: PAC storage tank, supply pump 24, third connecting pipe 23, second one-way valve 22, two-inlet-one-outlet connecting platform 21, second connecting pipe 20, solenoid valve group 19, first connecting pipe 17, first one-way valve 16, first bidirectional pipe, inner cavity of stirring roller 13, impeller connecting hole, and finally enters PAC dosing chamber 2; the flow path of PAM liquid is the same as that of PAC liquid, the difference being that PAM liquid is output from PAM storage tank and finally enters PAM dosing chamber 4;The second inlet end of the two-inlet-one-outlet connecting platform 21 is connected to a third bidirectional pipe. The other end of the third bidirectional pipe is connected to a third one-way valve 25. The other end of the third one-way valve 25 is connected to a fourth connecting pipe 26. The other end of the fourth connecting pipe 26 is connected to an air pump 27. The third one-way valve 25 is configured to allow air to enter the two-inlet-one-outlet connecting platform 21 through the fourth connecting pipe 26 and prevent the PAC or PAM solution in the two-inlet-one-outlet connecting platform 21 from flowing back into the air pump 27 through the fourth connecting pipe 26. The air pump 27 is used to input air into the two-inlet-one-outlet connecting platform 21 after the liquid supply pump 24 stops working, so that the air flows along the second connecting pipe 20, the solenoid valve group 19, and the first... The connecting pipe 17 and the inner cavity of the stirring roller 13 enter the corresponding dosing chamber, thereby assisting in stirring the liquid. When cleaning is required, the liquid supply pump 24 can be connected to an external cleaning liquid source, and the air pump 27 provides pressure synchronously, so that the cleaning liquid and gas can flush the two-in-one-out connecting platform 21, the second connecting pipe 20, the solenoid valve group 19, the first connecting pipe 17, and the inner cavity of the stirring roller 13. The vertical sections of the multiple first connecting pipes 17 are respectively connected to a fourth bidirectional pipe, the multiple fourth bidirectional pipes are respectively connected to a fourth one-way valve 30, the multiple fourth one-way valves 30 are respectively connected to a fifth connecting pipe 29, and the multiple fifth connecting pipes 29 are respectively connected to the air supply pump group 28 on the outside of the treatment tank body 1. The air supply pump assembly 28 includes a first air supply pump, a second air supply pump, a third air supply pump, and a fourth air supply pump, each corresponding to a different fifth connecting pipe 29. The fourth one-way valve 30 is configured to allow air to enter the first connecting pipe 17 from the fifth connecting pipe 29 and prevent the liquid medicine in the first connecting pipe 17 from flowing back into the fifth connecting pipe 29. During operation of the liquid supply pump 24, the control box can control the first, second, third, and fourth solenoid valves in the solenoid valve assembly 19 to open individually, all at once, or alternately. When the solenoid valves are closed, the liquid medicine no longer flows into the first connecting pipe 17 corresponding to the closed solenoid valve. At this time, the control box can start the air supply pump corresponding to the first connecting pipe 17, so that air enters the first connecting pipe 17 through the fifth connecting pipe 29 and the fourth one-way valve 30, and is further sprayed into the PAC dosing chamber 2 or PAM dosing chamber 4 through the impeller connecting hole of the stirring roller 13. Thus, the liquid medicine dosing position and the air disturbance position can be alternately distributed, so that the PAC liquid medicine or PAM liquid medicine forms a stronger dispersion and mixing effect in the corresponding dosing chamber.The outer side of the stirring roller 13 is integrally formed with multiple recesses corresponding to the first bidirectional pipe from top to bottom, and the recesses are recessed inwards towards the stirring roller 13. Sealed bearings 31 are installed on the inner top and bottom surfaces of the recesses, and a positioning platform 33 that fits against the outer wall of the stirring roller 13 is installed between two sealed bearings 31. A connecting platform connected to the first bidirectional pipe is provided at the rear end of the positioning platform 33. Multiple connecting grooves 32, which connect to the hollow structure of the stirring roller 13, are equidistantly opened on the outer side of the recesses. Through the arrangement of the sealed bearings 31, the stirring roller 13 can rotate relative to the positioning platform 33, while the positioning platform 33, the first bidirectional pipe, the first one-way valve 16, and the first connecting pipe 17 can remain relatively fixed, thereby preventing the external pipes from becoming entangled or twisted when the stirring roller 13 rotates. After the liquid medicine or air enters the positioning platform 33 through the first bidirectional pipe, it can enter the inner cavity of the stirring roller 13 through the connecting groove 32, and then be sprayed out through the connecting hole on the impeller. The first one-way valve 16, the second one-way valve 22, the third one-way valve 25, and the fourth one-way valve 30 all include a valve body. A connecting plate 34 and a conical limiting platform 35 are respectively installed on both sides of the inner cavity of the valve body. A one-way ball 36 is provided on the inner side of the conical limiting platform 35. A spring 37 is installed between the one-way ball 36 and the connecting plate 34. The connecting plate 34 is provided with a through hole for liquid or gas to pass through. When liquid or gas enters the valve body in the allowed flow direction, the fluid pressure pushes the one-way ball 36 to compress the spring 37, allowing the fluid to pass through the connecting plate 34. When liquid or gas flows in the reverse direction, the spring 37 pushes the one-way ball 36 to abut against the inner side of the conical limiting platform 35, thereby blocking the reverse channel and preventing the liquid medicine or gas from flowing back.

[0037] Example 3: The technical solution is basically the same as that of Example 1, except that, as Figure 2 and Figure 5As shown, the feeding assembly includes a drain pipe, a first spiral roller 38, a second spiral roller 39, a manual-electric integrated valve 40, and a drive motor 41. The drain pipe is installed on the hollow bottom surface of the conical platform 6 and is used to discharge alum floc impurities that settle and collect in the sedimentation chamber 5 at the conical platform 6. The cleaning end of the cleaning roller 12 is in contact with the inner surface of the conical platform 6. When the third motor 11 drives the cleaning roller 12 to rotate, the cleaning roller 12 can scrape the sediment on the surface of the conical platform 6 toward the hollow hole in the middle of the conical platform 6.A first spiral roller 38 is sleeved on the outer side below the cleaning roller 12. The first spiral roller 38 has a conical structure and is placed inside the vertical section of the sewage pipe. When the first spiral roller 38 rotates with the cleaning roller 12, it can transport the sediment entering the vertical section of the sewage pipe downward, reducing the accumulation and blockage of sediment at the hollow hole at the bottom of the conical platform 6. A manual-electric integrated valve 40 is installed at one end of the sewage pipe. The manual-electric integrated valve 40 is used to control the opening and closing of the sewage pipe. It can be electrically controlled by the control box or manually operated during maintenance or power failure. A second spiral roller 39 is rotatably connected to the inner side of the longitudinal section of the sewage pipe. One end of the second spiral roller 39 passes through the sewage pipe and is connected to the drive motor 41 through a coupling. The drive motor 41 is installed inside the sedimentation chamber 5. On the bottom surface, a drive motor 41 drives the second spiral roller 39 to rotate, causing the sediment in the longitudinal section of the drain pipe to be discharged along the drain pipe, thereby improving the continuity of sludge and impurity transport and reducing the probability of drain pipe blockage. Liquid level sensors 43 and pH sensors 44 are vertically installed on both sides of the front wall of the inner cavity of PAC dosing chamber 2, mixing chamber 3, and PAM dosing chamber 4, respectively. The liquid level sensor 43 is used to detect the liquid level in the corresponding chamber, and the pH sensor 44 is used to detect the pH value of the liquid in the corresponding chamber. Turbidity sensors 45 are installed below the front wall and above the rear wall of the inner cavity of PAC dosing chamber 2, mixing chamber 3, and PAM dosing chamber 4. The turbidity sensors 45 are used to detect the turbidity difference between the upper and lower parts of the liquid in the corresponding chamber to determine... The mixing state of the chemical solution and coal mine wastewater, as well as the formation of flocs, are analyzed. The flow meter 46 can be a PT6006, the level sensor 43 can be a SWSN-L30, the pH sensor 44 can be a SIN-PH6.3, and the turbidity sensor 45 can be a medium-range turbidity detection product from Shandong Yuance Environmental Technology Co., Ltd. These models are merely examples of possible implementations and are not intended to limit the specific models of the corresponding sensors. Any sensor capable of performing the same detection function can be used in this device. A circulation pump 42 is installed at the rear end of the treatment tank body 1. The circulation pump 42 is located outside the mixing chamber 3. The inlet end of the circulation pump 42 is connected to the first circulation pipe, and the other end of the first circulation pipe is connected to the mixing chamber. Below the inner cavity of chamber 3; the outlet end of the circulation pump 42 is connected to the second circulation pipe, and the other end of the second circulation pipe is connected to the upper part of the inner cavity of the PAC dosing chamber 2. The control box determines whether the liquid in the mixing chamber 3 meets the set mixing requirements based on the turbidity data detected by the turbidity sensor 45. When the turbidity of the liquid in the mixing chamber 3 does not meet the set requirements, the control box starts the circulation pump 42, so that the liquid in the mixing chamber 3 flows back to the PAC dosing chamber 2 through the first circulation pipe, the circulation pump 42 and the second circulation pipe, and performs PAC dosing and stirring again, thereby improving the stability of coagulation treatment of coal mine wastewater. In use, coal mine wastewater first enters the PAC dosing chamber 2 through the inlet platform 7, and the flow meter 46 detects the inlet flow rate and transmits the signal to the control box.The control box controls the corresponding liquid supply pump 24 to work according to the inlet water flow, so that the PAC solution enters the PAC dosing chamber 2 through the liquid mixing device. The PAC solution is dispersed and sprayed out through the inner cavity of the stirring roller 13 and the impeller connecting hole. At the same time, the stirring roller 13 rotates under the drive of the first motor 9, so that the PAC solution and the coal mine sewage are quickly mixed. Then, the coal mine sewage enters the mixing chamber 3, and the second motor 10 drives the mixing roller 14 to further stir the mixture. The mixed liquid enters the PAM dosing chamber 4. The PAM solution is dispersed into the PAM dosing chamber 4 through the corresponding liquid mixing device, and fully contacts the mixture under the action of the stirring roller 13 and the circulation cylinder 15, so that the small flocs gradually form larger flocs. Then, the liquid enters the sedimentation chamber 5, and the floc impurities settle to the surface of the conical platform 6 in the sedimentation chamber 5. The supernatant overflows evenly through the overflow plate and is discharged from the outlet platform and enters the collection tank. The sediment is discharged from the main body of the treatment tank 1 under the action of the cleaning roller 12, the first spiral roller 38, the second spiral roller 39 and the sewage pipe.

[0038] Furthermore, in one embodiment of the present invention, a control box is disposed on the outside of the treatment tank body 1. The control box is electrically connected to the liquid supply pump 24, the air supply pump group 28, the air pump 27, the circulation pump 42, the flow meter 46, the liquid level sensor 43, the pH sensor 44, the turbidity sensor 45, the solenoid valve group 19, and the first motor 9, the second motor 10, and the third motor 11. The flow meter 46 is used to detect the flow rate of coal mine wastewater entering the treatment tank body 1 in real time. The control box controls the operating frequency of the corresponding liquid supply pump 24 according to the flow data detected by the flow meter 46, thereby adjusting the dosage of PAC solution and PAM solution.

[0039] The liquid level sensor 43 is used to detect the liquid level in the PAC dosing chamber 2, mixing chamber 3, and PAM dosing chamber 4. When the liquid level sensor 43 detects that the liquid level in the corresponding area exceeds the preset upper limit, the control box reduces the operating frequency of the corresponding liquid supply pump 24. When the liquid level is lower than the preset lower limit, the control box controls the liquid supply pump 24 to resume normal operation. The turbidity sensor 45 is used to detect the turbidity of the liquid at different locations in the PAC dosing chamber 2, mixing chamber 3, and PAM dosing chamber 4. The control box calculates the liquid turbidity difference based on the detection results of the turbidity sensor 45.

[0040] When the turbidity difference exceeds the preset turbidity difference threshold, the control box controls the circulation pump 42 to start, allowing some of the liquid in the mixing chamber 3 to enter the circulation pump 42 through the first circulation pipe and then flow back to the PAC dosing chamber 2 through the second circulation pipe for re-mixing. When the turbidity difference is less than the preset turbidity difference threshold, the control box controls the circulation pump 42 to stop running. The pH sensor 44 is used to detect the acidity or alkalinity of the liquid in the corresponding treatment area. The control box controls the operation of the liquid supply pump 24 based on the detection results of the pH sensor 44 and the flow meter 46 to maintain the stability of the drug dosing process.

[0041] The control box can also control the opening and closing state of the solenoid valve group 19 according to the detection result of the turbidity sensor 45, so that the liquid passages corresponding to different first connecting pipes 17 are opened alternately in a preset order, so as to realize the layered addition of liquid at different height positions; when the corresponding liquid passage is closed, the control box controls the corresponding air supply pump group 28 to work, so that air enters the inner cavity of the stirring roller 13 through the fifth connecting pipe 29, the fourth one-way valve 30, the first connecting pipe 17, and the first two-way pipe, and is released into the liquid through the connecting hole on the outer impeller of the stirring roller 13, thereby forming a gas-liquid disturbance state, improving the liquid diffusion efficiency and coagulation reaction effect.

[0042] Working principle: In this embodiment, the present invention also proposes a method for using an intelligent coagulation treatment device for coal mine wastewater, including the following steps:

[0043] Step 1: Before the device is put into operation, connect the control box on the outside of the main body 1 of the treatment tank to the external power supply to complete the power supply preparation for the whole machine; then align and install the PAC storage tank, PAM storage tank, collection tank and collection box, so that the PAC storage tank and PAM storage tank are sealed and connected to the inlet end of the corresponding liquid supply pump 24, and at the same time, accurately align the outlet platform at the rear end of the main body 1 of the treatment tank with the collection box to ensure that the supply of chemical solution, the collection of purified water and the sewage collection channels are unobstructed; after the equipment wiring and assembly are completed, start the flow meter 46, liquid level sensor 43, pH sensor 44 and turbidity sensor 45 through the control box, and all kinds of sensors simultaneously enter real-time monitoring. Measurement status: Flow meter 46 is fixed on one side of inlet platform 7 to continuously detect the real-time flow rate of coal mine wastewater entering the main body of treatment tank 1; liquid level sensor 43 is vertically installed on both sides of the front wall of the inner cavity of PAC dosing chamber 2, mixing chamber 3, and PAM dosing chamber 4 to monitor the liquid height inside each cavity in real time; pH sensor 44 synchronously collects the acidity and alkalinity data of wastewater in the three chambers; turbidity sensor 45 is respectively arranged below the front wall and above the rear wall of each cavity to compare and detect the difference in turbidity between the upper and lower parts of the cavity, thereby predicting the mixing state of the liquid and the floc formation, providing accurate basic detection signals for subsequent intelligent control of chemicals, water recirculation, and process adjustment;

[0044] Step 2: External coal mine wastewater is guided by the inlet platform 7 and smoothly fed into the PAC dosing chamber 2 inside the main body of the treatment tank 1. During the inlet process, the flow meter 46 continuously collects the inlet flow signal and transmits it to the control box in real time. Based on the inlet flow data, the control box precisely controls the start, stop, and operating power of the supply pump 24 connected to the PAC storage tank to achieve quantitative delivery of PAC solution. Under the pressure drive of the supply pump 24, the PAC solution is transported along a fixed path: sequentially passing through the third connecting pipe 23, the second one-way valve 22, the two-inlet-one-outlet connecting platform 21, the second connecting pipe 20, the solenoid valve group 19, the first connecting pipe 17, the first one-way valve 16, and the first two-way pipe, finally entering the inner cavity of the hollow structure stirring roller 13. The second one-way valve 22 can prevent the solution from flowing back. To prevent backflow of the chemical solution into the supply pump 24 and cause equipment failure, the PAC solution entering the inner cavity of the stirring roller 13 is evenly sprayed into the PAC dosing chamber 2 through the connecting holes on the impeller on the outer side of the stirring roller 13. At the same time, the control box starts the first motor 9, which drives the stirring roller 13 in the PAC dosing chamber 2 to rotate at a set speed through the coupling. The circulation cylinder 15 sleeved on the outer side of the stirring roller 13 forms a circulating mixing channel with the stirring roller 13. During the rotation, the sewage in the PAC dosing chamber 2 forms a local circulation flow, which greatly improves the contact mixing efficiency between the PAC solution and the coal mine sewage. After the PAC solution is fully mixed, it can promote the rapid destabilization of suspended particles in the coal mine sewage, gradually coagulate to form fine flocs, and complete the preliminary coagulation treatment of the sewage.

[0045] Step 3: The coal mine wastewater, after preliminary treatment with PAC solution and the formation of fine flocs, flows smoothly into the adjacent mixing chamber 3 for deep homogenization and mixing. The control box starts the second motor 10, which drives the mixing roller 14 to rotate continuously via a coupling, thoroughly agitating the wastewater and PAC solution mixture inside the mixing chamber 3. This eliminates uneven concentrations of the solution and uneven distribution of flocs, allowing the PAC solution and wastewater to further blend fully. During the mixing process, turbidity sensors 45 located above and below the mixing chamber 3 continuously collect turbidity data and feed it back to the control box. The control box has a built-in preset turbidity standard threshold and intelligently judges real-time data: if the turbidity of the water does not meet the standard, it means that the chemical solution is not mixed sufficiently and the suspended particles are not completely destabilized. The control box immediately starts the circulation pump 42 outside the mixing chamber 3. The unqualified water in the mixing chamber 3 flows back to the top of the PAC dosing chamber 2 through the first circulation pipe, circulation pump 42 and the second circulation pipe, and re-participates in the PAC chemical solution addition and mixing process until the water quality meets the standard; if the turbidity data meets the set standard, the mixing operation is judged to be completed, and the water flows smoothly downward and enters the PAM dosing chamber 4 to carry out coagulation aid operation.

[0046] Step 4: After the compliant mixed water enters the PAM dosing chamber 4, the control box integrates multi-dimensional detection data from the flow meter 46, level sensor 43, pH sensor 44, and turbidity sensor 45 to precisely regulate the operation of the supply pump 24 connected to the PAM storage tank, quantitatively delivering the PAM solution. The PAM solution follows the same delivery path as the PAC solution, and is finally dispersed and sprayed out from the impeller connection hole of the stirring roller 13 inside the PAM dosing chamber 4. At the same time, the first motor 9 continuously drives the corresponding stirring roller 13 to rotate, forming a circulating flow field with the circulation cylinder 15, allowing the PAM solution to mix quickly and evenly with the pre-coagulated wastewater. The PAM solution uses its own bridging effect to connect and aggregate the dispersed fine flocs in the wastewater, gradually forming larger flocs with stronger settling properties. Throughout the entire dosing process, the control box can intelligently switch electromagnetic... The working state of valve group 19 controls the individual, all, or staggered opening of the first, second, third, and fourth solenoid valves within the group, enabling multi-height, stratified dosing of the chemical solution and avoiding localized concentration of the chemical solution. When some solenoid valves are closed and the corresponding first connecting pipe 17 stops dispensing the chemical solution, the control box simultaneously starts the corresponding air supply pump in the air supply pump group 28. Compressed air is introduced into the inner cavity of the stirring roller 13 through the fifth connecting pipe 29, the fourth one-way valve 30, and the first connecting pipe 17, and finally sprayed out from the impeller connecting hole, creating air disturbance during the chemical solution dosing interval. The alternating distribution of the chemical solution dosing area and the air disturbance area further breaks up the static stratification of the water, enhances the chemical solution dispersion effect, and ensures stable and uniform formation of floc. The fourth one-way valve 30 can effectively prevent the chemical solution in the first connecting pipe 17 from flowing back into the air supply equipment, ensuring the safe operation of the equipment.

[0047] Step 5: Wastewater that has undergone PAM coagulation to form large flocs eventually flows into sedimentation chamber 5, entering the solid-liquid separation stage. Sedimentation chamber 5 is equipped with a hollow conical platform 6. Large floc impurities quickly settle to the bottom of the water body under their own gravity, gradually accumulating on the inner surface of the conical platform 6. An overflow plate above the inner side of sedimentation chamber 5 rectifies the supernatant after sedimentation, allowing clean water to overflow evenly along the upper edge of the overflow plate, effectively reducing the local flow velocity at the outlet and preventing excessive flow from entraining unsettled flocs. Simultaneously, it stabilizes the water level inside sedimentation chamber 5. The overflowing supernatant is guided by the rear outlet platform and finally discharged into the outer collection tank to complete the clean water collection. During sludge discharge, the control box starts the third motor 11, which drives the cleaning roller 12 to rotate. The end of the cleaning roller 12 contacts the inside of the conical platform 6. The walls fit tightly, scraping away all the alum floc sludge adhering to and accumulating on the surface of the conical platform 6 to the hollow hole in the middle of the conical platform 6. At the same time, the conical first spiral roller 38, which is sleeved below the cleaning roller 12, rotates synchronously, continuously conveying the sludge falling into the vertical section of the sewage pipe downwards, preventing the sludge from accumulating and clogging at the hollow hole. Then, the control box opens the manual-electric integrated valve 40 on the sewage pipe to open the sewage passage, and at the same time, the drive motor 41 on the bottom of the sedimentation chamber 5 is started. The drive motor 41 drives the second spiral roller 39 inside the longitudinal section of the sewage pipe to rotate at a set speed, continuously conveying sludge impurities through spiral pushing force, ensuring a continuous and smooth sewage discharge process, and completely completing the solid-liquid separation of sewage and sludge discharge operation. The manual-electric integrated valve 40 supports electric and manual dual-mode control, which can be adapted to different scenarios such as normal operation and power outage maintenance.

[0048] Step Six: After the entire wastewater treatment operation is completed, the control box executes an orderly shutdown procedure, sequentially stopping all operations of the liquid supply pump 24, air supply pump group 28, air pump 27, circulation pump 42, first motor 9, second motor 10, third motor 11, and drive motor 41. Simultaneously, the manual-electric integrated valve 40 is closed to block the sewage discharge pipeline, completing the basic equipment shutdown. If the equipment requires deep cleaning to remove residual chemicals and sludge impurities from the chemical pipeline and stirring structure, the inlet end of the liquid supply pump 24 can be switched to connect to an external cleaning liquid source. Subsequently, the control box synchronously starts the liquid supply pump 24 and the air pump 27. The cleaning liquid is pressurized by the liquid supply pump 24, and the air is pumped by the air pump 27. Under pressure, a gas-liquid mixed cleaning medium is formed and flows at high speed along the complete liquid path of the two-inlet-one-outlet connecting platform 21, the second connecting pipe 20, the solenoid valve group 19, the first connecting pipe 17, and the inner cavity of the stirring roller 13. This process thoroughly flushes and cleans all liquid delivery pipelines, valve group cavities, and the internal cavity of the stirring roller 13, removing residual liquid and trace amounts of sludge and impurities, and preventing pipeline blockage, equipment corrosion, and liquid residue deterioration. After the cleaning operation is completed and the water inside the pipeline has drained, the power supply to all electrical equipment is cut off through the control box, and the connection between the control box and the external power supply is disconnected. This completes the entire process of shutdown, cleaning, and finishing of the equipment, and the equipment returns to its initial standby state.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A smart coagulation treatment device for coal mine wastewater, comprising a treatment tank body (1), wherein the treatment tank body (1) is provided with a PAC dosing chamber (2), a mixing chamber (3), a PAM dosing chamber (4) and a sedimentation chamber (5) in sequence, and a hollow conical platform (6) is provided inside the sedimentation chamber (5), an overflow plate is provided above the inside of the sedimentation chamber (5), and an outlet platform is connected to the rear end; an inlet platform (7) is connected to the upper side of the rear end of the PAC dosing chamber (2); a standing platform (8) is provided horizontally on the top surface of the treatment tank body (1), and a first motor (9) with its output shaft placed inside the PAC dosing chamber (2) and the PAM dosing chamber (4), and a second motor (10) and a third motor (11) placed inside the mixing chamber (3) and the sedimentation chamber (5) are installed vertically on the top surface of the standing platform (8), wherein: The output shafts of the first motor (9), the second motor (10) and the third motor (11) are vertically connected to the stirring roller (13), the mixing roller (14) and the cleaning roller (12) with impellers on the outside through couplings, respectively. The stirring roller (13) has a hollow structure. The two stirring rollers (13) are fitted with circulation cylinders (15) on the outside. Two sets of liquid mixing devices with the same structure are installed between the outside of the treatment tank body (1) and the inner cavity of the PAC dosing chamber (2) and the PAM dosing chamber (4). The sedimentation chamber (5) is equipped with a feeding assembly for assisting the transport of sediment.

2. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 1, characterized in that: The liquid mixing device includes multiple first bidirectional pipes that are equidistantly and vertically installed on the outer side of the rear end of the stirring roller (13). Each of the multiple first bidirectional pipes is equipped with a first one-way valve (16) at the other end. Each of the multiple first one-way valves (16) is equipped with a multiple first connecting pipe (17) at the other end. The one-way ends of the multiple first one-way valves (16) face the first connecting pipes (17). Each of the multiple first connecting pipes (17) is connected to a switching platform (18) fixed inside the treatment tank body (1). The switching platform (18) is equipped with multiple solenoid valve groups (19) adapted to the first connecting pipes (17). The solenoid valve groups (19) are sequentially provided with a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve.

3. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 2, characterized in that: The other end of the solenoid valve assembly (19) is equipped with a second connecting pipe (20). The other ends of the multiple second connecting pipes (20) are connected to a two-inlet-one-outlet connecting platform (21) fixed on the top surface of the treatment tank body (1). The first inlet end of the two-inlet-one-outlet connecting platform (21) is connected to a second bidirectional pipe. The other end of the second bidirectional pipe is connected to a second one-way valve (22). The other end of the second one-way valve (22) is connected to a third connecting pipe (23). The one-way end of the second one-way valve (22) faces the third connecting pipe (23). The other end of the third connecting pipe (23) is connected to a liquid supply pump (24) whose outlet end is connected to an external PAC storage tank.

4. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 3, characterized in that: The second inlet end of the two-inlet-one-outlet connecting platform (21) is connected to a third bidirectional pipe, the other end of the third bidirectional pipe is connected to a third one-way valve (25), the other end of the third one-way valve (25) is connected to a fourth connecting pipe (26), and the one-way end of the third one-way valve (25) faces the fourth connecting pipe (26), the other end of the fourth connecting pipe (26) is connected to an air pump (27).

5. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 2, characterized in that: Each of the first connecting pipes (17) has a fourth bidirectional pipe installed on one side of its vertical end. Each of the fourth bidirectional pipes has a fourth one-way valve (30) installed on the other end. Each of the fourth one-way valves (30) has a fifth connecting pipe (29) installed on the other end. Each of the fifth connecting pipes (29) has an air supply pump group (28) installed on the outside of the treatment tank body (1) on the other end. The air supply pump group (28) is provided with a first air supply pump, a second air supply pump, a third air supply pump and a fourth air supply pump in sequence.

6. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 2, characterized in that: The stirring roller (13) has an integrally formed recessed platform on its outer side from top to bottom, corresponding to the first bidirectional tube and recessed inward. Sealed bearings (31) are installed on the top and bottom surfaces of the recessed platform. Multiple connecting grooves (32) connecting the hollow structure of the stirring roller (13) are opened at equal intervals on the outer side of the recessed platform. Positioning platforms (33) that fit the outer wall of the stirring roller (13) are provided on the outer side of the two sealed bearings (31). A connecting platform connected to the corresponding first bidirectional tube is opened at the rear end of the positioning platform (33). Multiple connecting holes are opened at equal intervals on the outer impeller of the stirring roller (13).

7. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 2, characterized in that: The first one-way valve (16), the second one-way valve (22), the third one-way valve (25) and the fourth one-way valve (30) are respectively equipped with a connecting plate (34) and a conical limiting platform (35) on both sides of the inner cavity. The conical limiting platform (35) is provided with a one-way ball (36) on the inner side. A spring (37) is installed between the one-way ball (36) and the connecting plate (34).

8. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 1, characterized in that: The feeding assembly includes a drain pipe installed on the hollow bottom surface of the conical platform (6). The cleaning end of the cleaning roller (12) is in contact with the inner side of the conical platform (6). A first spiral roller (38) with a conical structure and placed inside the vertical end of the drain pipe is sleeved on the outer side below the cleaning roller (12). A manual-electric integrated valve (40) is installed at one end of the drain pipe. A second spiral roller (39) is rotatably connected to the inner side of the longitudinal end of the drain pipe. One end of the second spiral roller (39) passes through the drain pipe and is connected to a drive motor (41) placed inside the bottom surface of the sedimentation chamber (5) with a coupling.

9. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 1, characterized in that: A flow meter (46) is installed on one side of the liquid inlet platform (7). A liquid level sensor (43) and a pH sensor (44) are vertically installed on both sides of the front wall of the PAC dosing chamber (2), the mixing chamber (3) and the PAM dosing chamber (4). A turbidity sensor (45) is installed below the front wall and above the rear wall of the inner cavity.

10. The intelligent coagulation treatment equipment for coal mine wastewater according to claim 1, characterized in that: The treatment tank body (1) is equipped with a circulation pump (42) located outside the mixing chamber (3) at the rear end. The inlet end of the circulation pump (42) is connected to a first circulation pipe, and the other end of the first circulation pipe is connected to the lower part of the mixing chamber (3). The outlet end of the circulation pump (42) is connected to a second circulation pipe, and the other end of the second circulation pipe is connected to the upper part of the PAC dosing chamber (2).

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