Mine-based acid heavy metal wastewater recovery treatment equipment

Abstract

The invention discloses mine acid heavy metal wastewater recovery treatment equipment, and relates to the technical field of wastewater treatment. To solve the problem; the device specifically comprises a water inlet bin, a protection mechanism, a rotating mechanism, a driving mechanism, a reagent guide pipe and a reagent supply mechanism. By arranging the rotating mechanisms and the reagent supply mechanism, before wastewater enters the reaction tank, through synchronous reverse rotation of the double rotating mechanisms, two reverse rotational flows collide and shear with each other, the laminar flow state of water flow is broken, a high-strength three-dimensional turbulent flow field is formed in the water guide pipe, and a reagent guide pipe and a nozzle synchronously rotating along with an inclined blade plate are matched, so that the wastewater can be recycled. The chemical reagent is sprayed and dispersed into water flow in all directions, even solid particles penetrating through the slotted hole net can be in contact with the chemical reagent, the chemical reagent is immersed into the particles in advance, interference of residual acid wastewater on the reaction process in the reaction tank is avoided, sufficiency of neutralization reaction and heavy metal removal reaction is guaranteed, and the reaction efficiency is improved. The wastewater treatment effect is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to equipment for the recovery and treatment of acidic heavy metal wastewater from mines. Background Technology

[0002] Mining acidic heavy metal wastewater recovery and treatment equipment is a specialized environmental protection device customized for acidic mining wastewater generated throughout the entire mining process. It integrates functions such as acidity control, deep removal of heavy metals, solid-liquid separation, water resource recycling, and valuable metal resource recovery, making it a complete set of industrial environmental protection equipment. Unlike general-purpose wastewater treatment equipment, this equipment is adaptable to the characteristics of acidic mining wastewater: strong acidity, high heavy metal load, large fluctuations in water quality and quantity, persistent pollution, and susceptibility to corrosion and scaling. It balances environmental compliance with emission standards, pollution source control, and resource recycling, making it a core environmental protection device in the fields of metal mining and high-sulfur coal mining, mineral processing, tailings disposal, and ecological restoration of closed mining areas.

[0003] These types of recycling and treatment equipment are typically integrated systems. After being discharged from the outlet, acidic heavy metal wastewater from mines is first introduced into a neutralization reaction tank for chemical reaction, and then sequentially passed through a sedimentation tank, filter press, heavy metal capture device, membrane equipment, and resource recovery device for further treatment. However, acidic heavy metal wastewater from mines often contains solid impurities such as sand, gravel, and silt. Under gravity, these impurities easily settle and accumulate at the bottom of the neutralization reaction tank. Under current technology, the sand and silt accumulated at the bottom of the tank hinder the effective penetration of chemical reagents, making it difficult to accurately estimate and reasonably control the dosage of chemical reagents. Simultaneously, acidic heavy metal wastewater continuously seeps from the accumulated impurities, severely interfering with the chemical reaction process within the reaction tank, thereby reducing the wastewater treatment effect and increasing the cost and time required for the recycling and treatment of acidic heavy metal wastewater from mines. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mining acidic heavy metal wastewater recovery and treatment device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: Equipment for the recovery and treatment of acidic heavy metal wastewater from mines includes: The inlet chamber is equipped with a primary filtration mechanism for the initial filtration of solid particles in the wastewater. The output end of the inlet chamber is connected to a water guide pipe, and the output end of the water guide pipe is connected to the input end of the reaction tank. A protective mechanism is installed inside the water guide pipe to perform secondary filtration of solid particles in the flowing wastewater inside the water guide pipe. Two rotating mechanisms are provided, and both are located between the protective mechanism and the output end of the water pipe. A drive mechanism is mounted on the water guide pipe and is used to drive two rotating mechanisms to rotate synchronously and in opposite directions. The reagent conduit is provided on both of the rotating mechanisms, and the reagent conduit is provided with a plurality of nozzles; A reagent supply mechanism, located on the water conduit, is used to supply chemical reagents to the two reagent conduits.

[0006] Preferably, the primary filtration mechanism includes a filter grid, a comb plate, a traction assembly, a collection chamber, a guide rod, a return spring, a sliding block, and a drive rod. The filter grid is connected to the water inlet chamber at an inclined angle to the horizontal plane of the water inlet chamber. Several filter grooves are equidistantly opened along the upper edge of the filter grid. The filter grooves extend straight from the bottom end to the top end of the filter grid. The comb plate is set on the filter grid. Several cleaning plates are connected to the comb plate. The cleaning plates correspond one-to-one with the filter grooves and are engaged. Guide rods are connected to both outer walls of the inlet chamber, and the axis of the guide rods is parallel to the inclination direction of the filter grid. Sliding blocks are slidably connected to both guide rods, and the two sliding blocks are connected to the comb plate through the driving rod. The return spring is sleeved on the outside of the guide rod, and the two ends of the return spring are respectively connected to the high end of the guide rod and the sliding block. A slag discharge hole penetrating its side wall is opened at the high end of the inlet chamber near the filter grid. The collection chamber is connected to the outer wall of the inlet chamber, and the port of the collection chamber corresponds to the slag discharge hole. An electric valve is provided at the output end of the collection chamber. The traction assembly is disposed on the water inlet chamber, and the traction end of the traction assembly is connected to the comb plate. The traction assembly is used to pull the comb plate to slide along the extension direction of the filter tank.

[0007] Furthermore: the traction assembly includes a motor mounting plate, a drive motor, a winch, a traction rope, and two bearings. The motor mounting plate is installed on the outer wall of the water inlet chamber, above the collection chamber. Two bearings are connected to the motor mounting plate, and a bearing shaft is rotatably connected to each bearing. The winch is coaxially connected to the bearing shaft. The traction rope is wound on the winch, and one end of the traction rope is connected to the comb plate. The drive motor is installed on the motor mounting plate, and the output end of the drive motor is coaxially connected to the bearing shaft.

[0008] Based on the aforementioned scheme: the protective mechanism includes a perforated mesh, several arc-shaped scrapers, a rotating column, a rotating shaft, a sealed gearbox, a drive shaft one, a rotating bevel gear one, a rotating bevel gear two, and a drive motor two; The perforated mesh is arranged radially along the water guide pipe. The rotating column is located near the input end of the water guide pipe from the perforated mesh. Several arc-shaped scrapers are equidistantly arranged around the axis of the rotating column, and each arc-shaped scraper abuts against the surface of the perforated mesh. The sealing gearbox is fixedly connected to the water guide pipe by a fixing rod. Both the first and second rotating bevel gears are located inside the sealing gearbox. The rotating shaft is coaxially connected to the rotating column. One end of the rotating shaft passes through the sealing gearbox and is connected to the second rotating bevel gear. The rotating shaft and the sealing gearbox are sealed and rotatably connected. The second drive motor is installed on the outer wall of the water guide pipe. The output end of the second drive motor is coaxially connected to one end of the first drive shaft. The other end of the first drive shaft passes through the sealing gearbox and is connected to the first rotating bevel gear. The first drive shaft and the sealing gearbox are sealed and rotatably connected.

[0009] A better embodiment of the aforementioned scheme is as follows: a sedimentation tank is provided on the side wall of the water guide pipe, and the sedimentation tank is connected to the inside of the water guide pipe. An electric valve is provided at the bottom of the sedimentation tank. A material level sensor is provided on the side wall of the sedimentation tank, and the sensing end of the material level sensor extends into the inside of the sedimentation tank. The sedimentation tank is located on the side of the perforated mesh near the input end of the water guide pipe, and is located below one side of the perforated mesh.

[0010] As a further embodiment of the present invention: both of the rotating mechanisms include a fixed support, a rotating tube, and several inclined blades; The fixed bracket is connected to the inner wall of the water guide pipe along the diameter of the water guide pipe, the rotating pipe is rotatably connected to the fixed bracket, and several inclined blades are arranged to extend radially along the water guide pipe and are equidistantly arranged around the axis of the rotating pipe.

[0011] Meanwhile, the drive mechanism includes a sealing tube, two drive bevel gears, a drive bevel gear, a drive shaft, a drive motor, a bearing, and a sealing ring. The sealing tube is located between the two rotating mechanisms, and both ends of the sealing tube are respectively sealed and rotatably connected to the ends of the rotating tubes on the two rotating mechanisms. The axis of the sealing tube coincides with the axis of the two rotating tubes. The second drive shaft extends radially along the water guide pipe. The third drive motor is installed on the outer wall of the water guide pipe. The output end of the third drive motor is coaxially connected to one end of the second drive shaft. The second drive bevel gear is coaxially connected to the other end of the second drive shaft. Both first drive bevel gears are rotatably connected to the sealing tube through the second bearing. The two first drive bevel gears are coaxially connected to the rotating tubes on the two rotating mechanisms.

[0012] As a preferred embodiment of the present invention: each of the inclined blades is provided with a reagent conduit, the reagent conduit is provided along the extension direction of the inclined blade, and two adjacent reagent conduits are connected to each other; The reagent supply mechanism includes a supply tube, a fixed tube, a rotary joint, and an input tube; wherein, the supply tube is installed in the rotary tube of each of the two rotary mechanisms, the output end of the supply tube is connected to one of the corresponding reagent conduits, the input end of the supply tube is connected to the end of the fixed tube through a rotary joint, and the fixed tube is fixedly connected to the sealed tube.

[0013] Meanwhile, the input pipe is composed of input pipe one and input pipe two, and the output end of input pipe one is connected to the fixed pipe; The reagent supply mechanism further includes a storage tank, a level sensor, and a water pump; wherein, the input end of the first input pipe is connected to the output end of the water pump, and a flow sensor is installed on the first input pipe; the output end of the second input pipe is connected to the input end of the water pump, and the input end of the second input pipe extends into the storage tank; the storage tank is installed on the water guide pipe; the level sensor is installed on the storage tank, and its sensing end extends into the interior of the storage tank; a support plate is connected to the water guide pipe, and the water pump is installed on the support plate.

[0014] As a preferred embodiment of the present invention: the water guide pipe is provided with a flow sensor 2 and a flow sensor 3, the flow sensor 2 and the flow sensor 3 are respectively two sides of the perforated mesh, and the sensing ends of the flow sensor 2 and the flow sensor 3 extend into the water guide pipe.

[0015] The beneficial effects of this invention are as follows: 1. This invention, by setting up a rotating mechanism and a reagent supply mechanism, forms a high-intensity three-dimensional turbulent flow field in the water guide pipe by synchronously rotating in opposite directions before the wastewater enters the reaction tank. In conjunction with the reagent conduit and nozzle that rotate synchronously with the inclined blades, the chemical reagent is sprayed and dispersed into the water flow in all directions without dead angles. Even solid particles that penetrate the perforated mesh can come into contact with the chemical reagent, allowing the reagent to penetrate into the particle interior in advance. This avoids the interference of residual acidic wastewater on the reaction process in the reaction tank, ensures the sufficiency of the neutralization reaction and heavy metal removal reaction, and significantly improves the wastewater treatment effect.

[0016] 2. By setting up a primary filtration mechanism and a protective mechanism, the present invention first completes the initial interception and filtration of large-diameter solid particles through the primary filtration mechanism in the water inlet chamber, and then completes the secondary fine filtration of fine-diameter solid particles through the protective mechanism in the water guide pipe. The dual filtration significantly reduces the total amount of sand and sludge that can enter the reaction tank and settle to the bottom of the tank, thereby eliminating the interference of solid accumulation on the reaction process.

[0017] 3. The primary filtration mechanism in this invention, through the cooperation of the traction component and the reset spring, can drive the comb plate to slide back and forth along the filter groove of the inclined filter grid, scraping off the filter residue intercepted by the grid in real time and automatically discharging it into the collection chamber. The inclined grid design also allows the filter residue to accumulate naturally at the bottom, reducing the probability of filter groove blockage. The entire process does not require equipment shutdown or manual disassembly and cleaning, ensuring the continuous and stable use of the filter grid.

[0018] 4. The protective mechanism in this invention uses a second drive motor to rotate an arc-shaped scraper along the surface of the slotted mesh, scraping away solid particles intercepted by the mesh in real time. The solid particles automatically fall into the sedimentation tank for storage, and the filter residue is automatically discharged at regular intervals in conjunction with the material level sensor. At the same time, the flow sensor two and flow sensor three in front of and behind the slotted mesh can monitor the filter screen blockage in real time, automatically increase the cleaning speed to enhance the cleaning effect, and completely avoid equipment downtime caused by filter screen blockage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the planar structure of the mine acidic heavy metal wastewater recovery and treatment equipment proposed in this invention. Figure 2 The present invention provides a mining acidic heavy metal wastewater recovery and treatment equipment. Figure 1 Schematic diagram of the middle section; Figure 3 The present invention provides a mining acidic heavy metal wastewater recovery and treatment equipment. Figure 2 3D structural diagram Figure 1 ; Figure 4 The present invention provides a mining acidic heavy metal wastewater recovery and treatment equipment. Figure 2 3D structural diagram Figure 2 ; Figure 5 This is a three-dimensional structural diagram of the primary filtration mechanism of the mine acidic heavy metal wastewater recovery and treatment equipment proposed in this invention. Figure 6 This is a schematic diagram of the exploded structure of the filter grid and comb plate of the mine acidic heavy metal wastewater recovery and treatment equipment proposed in this invention. Figure 7 The present invention provides a mining acidic heavy metal wastewater recovery and treatment equipment. Figure 2 Schematic diagram of a partial structural cross-section; Figure 8 The present invention provides a mining acidic heavy metal wastewater recovery and treatment equipment. Figure 7 Enlarged schematic diagram of the structure at point A in the middle; Figure 9 This is a schematic diagram of the explosion structure of the protective mechanism for the mine acidic heavy metal wastewater recycling and treatment equipment proposed in this invention. Figure 10 This is a three-dimensional structural diagram of the rotating mechanism and reagent supply mechanism of the mining acidic heavy metal wastewater recovery and treatment equipment proposed in this invention. Figure 11 The present invention provides a mining acidic heavy metal wastewater recovery and treatment equipment. Figure 10 Schematic diagram of the middle section Figure 1 ; Figure 12 The present invention provides a mining acidic heavy metal wastewater recovery and treatment equipment. Figure 10 Schematic diagram of the middle section Figure 2 .

[0020] In the diagram: 1. Inlet tank; 2. Water guide pipe; 3. Primary filtration mechanism; 4. Protective mechanism; 5. Rotating mechanism; 6. Drive mechanism; 7. Reagent conduit; 8. Reagent supply mechanism; 9. Nozzle; 10. Filter grid; 11. Comb plate; 12. Traction assembly; 13. Collection tank; 14. Guide rod; 15. Return spring; 16. Sliding block; 17. Drive rod; 18. Filter tank; 19. Cleaning plate; 20. Slag outlet; 21. Electric valve one; 22. Motor mounting plate; 23. Drive motor one; 24. Winch; 25. Traction rope; 26. Bearing one; 27. Bearing shaft; 28. Perforated mesh; 29. ​​Arc-shaped scraper; 30. Rotating column; 31. Rotating shaft; 32. Sealed gearbox; 320. Fixed rod; 33. Drive shaft one; 34. 35. Rotary bevel gear 1; 36. Rotary bevel gear 2; 37. Drive motor 2; 38. Sedimentation tank; 39. Electric valve 2; 40. Level sensor; 41. Fixed bracket; 42. Rotary tube; 43. Inclined blade; 44. Sealing tube; 45. Drive bevel gear 1; 46. Drive shaft 2; 47. Drive motor 3; 48. Bearing 2; 49. Sealing ring; 50. Supply pipe; 51. Fixed pipe; 52. Rotary joint; 53. Input pipe 1; 54. Input pipe 2; 55. Storage tank; 56. Level sensor; 57. Water pump; 58. Flow sensor 1; 59. Support plate; 60. Flow sensor 2; 61. Flow sensor 3; 62. pH online monitor; 63. Heavy metal online analyzer. Detailed Implementation

[0021] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] Based on mining acidic heavy metal wastewater recovery and treatment equipment, such as Figures 1-12 As shown, it includes: water inlet chamber 1, protective mechanism 4, rotating mechanism 5, driving mechanism 6, reagent conduit 7, and reagent supply mechanism 8; Specifically, the inlet chamber 1 is equipped with a primary filtration mechanism 3 for primary filtration of solid particles in the wastewater. The output end of the inlet chamber 1 is connected to a water guide pipe 2, and the output end of the water guide pipe 2 is connected to the input end of the reaction tank. The protective mechanism 4 is located inside the water guide pipe 2 for secondary filtration of solid particles in the flowing wastewater within the water guide pipe 2. Two rotating mechanisms 5 are provided, both located between the protective mechanism 4 and the output end of the water guide pipe 2. The drive mechanism 6 is located on the water guide pipe 2 and is used to drive the two rotating mechanisms 5 to rotate synchronously and in opposite directions. Both rotating mechanisms 5 are equipped with reagent conduits 7, and the reagent conduits 7 are equipped with several nozzles 9. The reagent supply mechanism 8 is located on the water guide pipe 2 and is used to supply chemical reagents to the two reagent conduits 7. To facilitate the use and control of this device, this device includes a suitable electrical control system. In the implementation of the above structure, acidic heavy metal wastewater generated from mining is introduced into the inlet chamber 1 through a matching water pipe. The primary filtration mechanism 3 performs initial filtration of solid particles in the wastewater to prevent larger solid particles from damaging the inlet pipe 2. Next, the protective mechanism 4 filters the solid particles in the wastewater again to prevent them from impacting the rotating mechanism 5. The drive mechanism 6 drives the rotating mechanism 5 to operate. The two rotating mechanisms 5 rotate coaxially in opposite directions. This counter-rotating structure creates a strong turbulent flow field, achieving deep and uniform mixing of chemical reagents and wastewater. During the operation of the rotating mechanism 5, the reagent supply mechanism 8 continuously inputs chemical reagents into the reagent conduit 7, which can effectively mix the chemical reagents into the flowing wastewater. When the wastewater is introduced into the reaction tank, because the solid particles in the wastewater are not finely filtered, the solid particles in the wastewater will still settle at the bottom of the reaction tank. At this time, both the wastewater and the solid particles contain chemical reagents, completing the subsequent neutralization reaction, heavy metal precipitation, solid-liquid separation and resource recovery processes. It should be noted that the solid particles mentioned in this embodiment refer to the sand and silt mixed in with the wastewater.

[0024] The chemical reagent used in this device is an acidity neutralizing reagent, the main components of which are calcium hydroxide, sodium hydroxide or magnesium oxide. This chemical reagent is existing technology and will not be described in detail.

[0025] Furthermore, the primary filtration mechanism 3 is used to complete the primary filtration of large-diameter solid particles in wastewater and fully automatic online sludge removal, so as to avoid large solid particles scratching and clogging the water guide pipe 2. It includes a filter grid 10, a comb plate 11, a traction assembly 12, a collection chamber 13, a guide rod 14, a reset spring 15, a sliding block 16, and a drive rod 17. The filter grid 10 is connected to the water inlet chamber 1 at an inclined angle relative to the horizontal plane of the water inlet chamber 1. The filter grid 10 is fixedly installed in the water inlet chamber 1 at an inclined angle of 15°-30° relative to the horizontal plane of the water inlet chamber 1. Several filter grooves 18 are equidistantly opened along a straight line on the filter grid 10. The filter grooves 18 extend straight from the bottom end to the top end of the filter grid 10. The aperture of the filter grooves 18 is customized according to the particle size of solid particles in the mine wastewater and is used to intercept large-diameter solid particles. The comb plate 11 is set on the filter grid 10. Several cleaning plates 19 are connected to the comb plate 11. The cleaning plates 19 correspond one-to-one with the filter grooves 18 and are engaged. The width of the cleaning plates 19 is adapted to the width of the filter grooves 18 and can slide smoothly along the inner wall of the filter grooves 18 without jamming. Guide rods 14 are connected to both outer walls of the inlet chamber 1, and the axis of the guide rods 14 is parallel to the inclination direction of the filter grid 10. Sliding blocks 16 are slidably connected to both guide rods 14. The two sliding blocks 16 are connected to the comb plate 11 through the driving rods 17. The return spring 15 is sleeved on the outside of the guide rods 14, and the two ends of the return spring 15 are respectively connected to the high end of the guide rods 14 and the sliding blocks 16, providing a return driving force for the comb plate 11. A slag discharge hole 20 is opened at the high end of the inlet chamber 1 near the filter grid 10, penetrating its side wall. The collection chamber 13 is connected to the outer wall of the inlet chamber 1, and the port of the collection chamber 13 corresponds to the slag discharge hole 20. An electric valve 21 is provided at the output end of the collection chamber 13 for timed discharge of filter slag. In order to facilitate the detection of the degree of solid particle accumulation on the filter grid 10, differential pressure sensors are installed at the inlet and outlet of the inlet chamber 1 for monitoring. The traction assembly 12 is disposed on the water inlet chamber 1, and the traction end of the traction assembly 12 is connected to the comb plate 11. The traction assembly 12 is used to pull the comb plate 11 to slide along the extension direction of the filter tank 18.

[0026] The traction assembly 12 includes a motor mounting plate 22, a drive motor 23, a winch 24, a traction rope 25, and two bearings 26. The motor mounting plate 22 is installed on the outer wall of the water inlet chamber 1, which is located above the collection chamber 13. Two bearings 26 are connected to the motor mounting plate 22, and a bearing shaft 27 is rotatably connected to the two bearings 26. The winch 24 is coaxially connected to the bearing shaft 27. The traction rope 25 is wound on the winch 24, and one end of the traction rope 25 is connected to the middle of the top of the comb plate 11. The drive motor 23 is installed on the motor mounting plate 22. The output end of the drive motor 23 is coaxially connected to the bearing shaft 27. The drive motor 23 is a geared motor with a brake, which is fixedly installed on the motor mounting plate 22. Its output end is coaxially fixed to the bearing shaft 27 to provide driving force for the forward and reverse rotation of the winch 24. When in use, the drive motor 23 is in a brake-locked state, the winch 24 has no winding or unwinding action, and the comb plate 11 is held at the bottom initial position of the filter grid 10 under the elastic force of the return spring 15, without blocking the water passage section of the filter tank 18. After the acidic heavy metal wastewater enters the water inlet chamber 1, it flows from top to bottom through the inclined filter grid 10. Large solid particles in the wastewater with a particle size larger than the pore size of the filter tank 18 are intercepted on the water-facing surface of the grid. The filtered wastewater passes through the filter tank 18 and enters the subsequent process through the input end of the water guide pipe 2. When the solid particles intercepted by the filter grid 10 reach the preset thickness, the electronic control system triggers the slag removal program: the drive motor 23 starts, driving the bearing shaft 27 and the winch 24 to rotate in the forward direction, the traction rope 25 gradually winds up, and the traction comb 11 overcomes the elastic force of the return spring 15 and slides from bottom to top along the filter tank 18; during the sliding process, the cleaning plate 19 on the comb 11 scrapes the filter residue intercepted in the filter tank 18 and on the surface of the grid upwards until the filter residue is pushed to the position of the slag outlet 20, and automatically falls into the collection bin 13 under the action of gravity; after completing a single slag scraping, the drive motor 23 releases the brake, the winch 24 rotates in the reverse direction to release the traction rope 25, and the comb 11 automatically falls back to the initial position at the bottom of the filter grid 10 under the rebound force of the return spring 15, completing one slag removal cycle; When the filter residue in the collection chamber 13 reaches the preset material level, the electrical control system controls the electric valve 21 to open and discharge the collected filter residue, avoiding secondary pollution. During this process, the design of the inclined filter grid 10 allows the intercepted filter residue to naturally accumulate at the bottom of the grid under the action of gravity, reducing the probability of clogging in the filter tank 18. At the same time, it is convenient for the comb plate 11 to scrape the residue, resulting in higher cleaning efficiency. Furthermore, the traction component 12 and the return spring 15 work together to ensure that the device does not require equipment shutdown or manual disassembly and cleaning, achieving continuous cleaning during the filtration process, ensuring continuous and stable operation of the equipment, and significantly reducing manual maintenance costs.

[0027] The protective mechanism 4 includes a perforated mesh 28, several arc-shaped scrapers 29, a rotating column 30, a rotating shaft 31, a sealed gearbox 32, a drive shaft 1 33, a rotating bevel gear 1 34, a rotating bevel gear 2 35, and a drive motor 2 36. The perforated mesh 28 is arranged radially along the water guide pipe 2. The aperture of the perforated mesh 28 can be opened according to the working conditions and is not limited. The rotating column 30 is located near the input end of the water guide pipe 2 of the perforated mesh 28. Several arc-shaped scrapers 29 are equidistantly arranged around the axis of the rotating column 30, and the cutting edge of each arc-shaped scraper 29 abuts against the surface of the perforated mesh 28. The sealed gear box 32 is fixedly connected to the water guide pipe 2 by the fixing rod 320. The rotating bevel gear 1 34 and the rotating bevel gear 2 35 are both located in the sealed gear box 32. The rotating shaft 31 is coaxially connected to the rotating column 30. One end of the drive shaft 31 passes through the sealed gearbox 32 and is connected to the rotating bevel gear 35. The rotating shaft 31 is rotatably connected to the sealed gearbox 32. The drive motor 36 is installed on the outer wall of the water pipe 2. The output end of the drive motor 36 is coaxially connected to one end of the drive shaft 33. The other end of the drive shaft 36 passes through the sealed gearbox 32 and is connected to the rotating bevel gear 34. The drive shaft 33 is rotatably connected to the sealed gearbox 32. It should be noted that the above-mentioned rotatably connected seals are all set as acid and alkali resistant mechanical seals. This technical solution is existing technology and will not be described in detail.

[0028] As a complement, a sedimentation tank 37 is provided on the side wall of the water guide pipe 2, and the sedimentation tank 37 is connected to the inside of the water guide pipe 2. An electric valve 38 is provided at the bottom of the sedimentation tank 37. A material level sensor 39 is provided on the side wall of the sedimentation tank 37. The sensing end of the material level sensor 39 extends into the inside of the sedimentation tank 37. The sedimentation tank 37 is located on the side of the perforated mesh 28 near the input end of the water guide pipe 2, and is located below one side of the perforated mesh 28. When in use, the wastewater after primary filtration enters the water guide pipe 2 and flows through the slotted mesh 28. Solid particles in the wastewater with a diameter larger than the pore size of the slotted mesh 28 are intercepted on the water-facing side of the slotted mesh 28. The filtered wastewater passes through the slotted mesh 28 and flows downstream to the rotating mechanism 5. During equipment operation, drive motor 2 36 runs continuously at low speed, driving rotating bevel gear 34 to rotate via drive shaft 33. After reversing through meshing rotating bevel gear 2 35, rotating shaft 31 and rotating column 30 rotate synchronously, thereby driving the annularly arranged arc-shaped scraper 29 to rotate circumferentially along the surface of the perforated mesh 28. The rotating arc-shaped scraper 29 continuously scrapes off the filter residue intercepted on the surface of the perforated mesh 28. Under the combined action of gravity and water flow, the scraped filter residue falls downward into the sedimentation tank 37 for storage, preventing the filter residue from re-adhering to the surface of the perforated mesh 28, realizing continuous online cleaning during the filtration process, and ensuring the stability of the water passage section of the perforated mesh 28. Furthermore, when the level sensor 39 detects that the filter residue in the sedimentation tank 37 has reached the preset level threshold, the electrical control system triggers the slag discharge program, controls the electric valve 38 to open, and discharges the filter residue collected in the tank. After the slag discharge is completed, the electric valve 38 automatically closes to prevent wastewater leakage. The aforementioned protective mechanism 4 can perform secondary filtration, filtering fine-diameter solid particles in the wastewater again, thereby preventing excessive solid particles from entering the downstream rotating mechanism 5, preventing the inclined blade 42 from being impacted and worn, and the reagent nozzle 9 from being blocked, extending the service life of core components, reducing equipment failure rate, and the continuous rotating anti-clogging design of the arc-shaped scraper 29 and the slotted mesh 28 in close contact can remove filter residue attached to the mesh surface in real time, solving the problem of clogging of the slotted mesh 28 caused by fine sand and silt, without the need to stop the machine for cleaning, ensuring continuous operation of the equipment.

[0029] The two rotating mechanisms 5 can enhance the mixing effect of chemical reagents and wastewater, and each of the two rotating mechanisms 5 includes a fixed support 40, a rotating tube 41 and several inclined blades 42. The fixed bracket 40 is connected to the inner wall of the water guide pipe 2 along the diameter of the water guide pipe 2, the rotating pipe 41 is rotatably connected to the fixed bracket 40, and several inclined blades 42 are arranged radially along the water guide pipe 2 and are equidistantly arranged around the axis of the rotating pipe 41.

[0030] The drive mechanism 6 includes a sealing tube 43, two drive bevel gears 44, a second drive bevel gear 45, a second drive shaft 46, a third drive motor 47, a second bearing 48, and a sealing ring 49. The sealing tube 43 is located between the two rotating mechanisms 5. The sealing tube 43 is fixed inside the water guide tube 2 by a radial rod. Both ends of the sealing tube 43 are respectively sealed and rotatably connected to the ends of the rotating tubes 41 on the two rotating mechanisms 5. The two ends of the sealing tube 43 are respectively sealed and rotatably connected to the opposite ends of the two rotating tubes 41 by acid and alkali resistant mechanical seals. The acid and alkali resistant mechanical seals are existing technical solutions and will not be described in detail. The axis of the sealing tube 43 coincides with the axis of the two rotating tubes 41. The second drive shaft 46 extends radially along the water guide tube 2. The third drive motor 47 is installed on the outer wall of the water guide tube 2. The output end of the third drive motor 47 is coaxially connected to one end of the second drive shaft 46. The third drive motor 47 is a waterproof geared motor. The second drive bevel gear 45 is coaxially connected to the other end of the second drive shaft 46. Both first drive bevel gears 44 are rotatably connected inside the sealing tube 43 by bearings 48. The two first drive bevel gears 44 are respectively coaxially connected to the rotating tubes 41 on the two rotating mechanisms 5. When the rotating mechanism 5 is running, the drive motor 3 47 runs continuously, driving the drive shaft 2 46 and the drive bevel gear 2 45 to rotate synchronously; the drive bevel gear 2 45, through gear meshing, synchronously drives the two drive bevel gears 1 44 on both sides to rotate in opposite directions, thereby driving the two rotating tubes 41 to rotate synchronously in opposite directions, and finally realizing that the inclined blades 42 on the two sets of rotating mechanisms 5 rotate coaxially in opposite directions in the water guide pipe 2. When the wastewater after secondary filtration flows through the rotating mechanism 5, the first set of rotating inclined blades 42 cuts and agitates the water flow for the first time, causing the water flow to generate a vortex in the first direction; then the water flow enters the area of ​​the second set of counter-rotating inclined blades 42, and is cut and agitated for the second time in the opposite direction, generating a vortex in the opposite direction; the two counter-rotating vortices collide and shear each other, breaking the laminar flow state of the water flow, and forming a high-intensity three-dimensional turbulent field in the water guide pipe 2, providing hydraulic conditions for the full mixing of chemical reagents and wastewater; The rotating mechanism 5 enhances the turbulence intensity of the water flow and improves the mixing efficiency between chemical reagents and wastewater.

[0031] Each inclined blade 42 is provided with a reagent conduit 7. The reagent conduit 7 is arranged along the extension direction of the inclined blade 42. Adjacent reagent conduits 7 are connected. The nozzle 9 on the reagent conduit 7 is a one-way nozzle to prevent wastewater from entering the reagent conduit 7 through the nozzle 9. The reagent supply mechanism 8 includes a supply tube 50, a fixed tube 51, a rotary joint 52, and an input tube; wherein, a supply tube 50 is provided in the rotary tube 41 of each of the two rotary mechanisms 5, the output end of the supply tube 50 is connected to one of the corresponding reagent conduits 7, the input end of the supply tube 50 is connected to the end of the fixed tube 51 through the rotary joint 52, and the fixed tube 51 is fixedly connected in the sealing tube 43.

[0032] The input pipe fitting consists of input pipe 1 53 and input pipe 2 54. The output end of input pipe 1 53 is connected to fixed pipe 51. The reagent supply mechanism 8 also includes a storage tank 55, a level sensor 56, and a water pump 57; wherein, the input end of the input pipe 1 53 is connected to the output end of the water pump 57, and a flow sensor 1 58 is installed on the input pipe 1 53 for real-time monitoring of the chemical reagent dosing flow rate; the output end of the input pipe 2 54 is connected to the input end of the water pump 57, and the input end of the input pipe 2 54 extends into the storage tank 55; the storage tank 55 is installed on the water guide pipe 2; the level sensor 56 is installed on the storage tank 55, and its sensing end extends into the storage tank 55 for real-time monitoring of the chemical reagent level; a support plate 59 is connected to the water guide pipe 2, and the water pump 57 is installed on the support plate 59; When the reagent supply mechanism 8 is in use, the water pump 57 is started, and chemical reagents are drawn from the storage tank 55 through the input pipe 2 54 and transported to the fixed pipe 51 through the input pipe 1 53. The chemical reagents in the fixed pipe 51 are continuously transported to the rotating supply pipe 50 through the rotary joint 52, and then enter the reagent conduit 7 through the supply pipe 50. Finally, they are sprayed into the water flow of the water guide pipe 2 through several nozzles 9. Synchronously, the rotating mechanism 5 drives the inclined blade 42 and the reagent conduit 7 to rotate synchronously, so that the nozzle 9 sprays chemical reagents in all directions during the rotation. With the strong turbulent flow field formed by the reverse rotation, the sprayed chemical reagents are instantly dispersed to all areas of the water flow, achieving instantaneous and uniform mixing with the acidic heavy metal wastewater. This allows the chemical reagents to fully contact the hydrogen ions and heavy metal ions in the wastewater, initiating the chemical reaction in advance. At the same time, even if a very small amount of solid particles penetrate the perforated mesh 28 and enter this area, they will fully contact the chemical reagents, allowing the chemical reagents to penetrate into the particles. This avoids the problem that the acidic wastewater seeping out from the bottom of the reaction tank cannot react with the chemical reagents after the particles settle at the bottom of the reaction tank. During the chemical reagent addition process, flow sensor 58 monitors the flow rate of the chemical reagent in real time. The electrical control system adjusts the operating frequency of water pump 57 in real time according to the influent flow rate, pH value, and heavy metal concentration of the wastewater to control the amount of chemical reagent added. Liquid level sensor 56 monitors the liquid level of chemical reagent in storage tank 55 in real time. When the liquid level is lower than the preset threshold, a low liquid level alarm is triggered to remind the staff to replenish the chemical reagent and avoid treatment failure due to reagent shortage. In this process, the chemical reagent is mixed into the wastewater in advance, so that the chemical reagent can fully contact the wastewater and residual solid particles before the wastewater enters the reaction tank. This solves the problem of impurities at the bottom of the reaction tank hindering the penetration of chemical reagent and interfering with the reaction process in the existing technology, improves the efficiency of heavy metal removal and the sufficiency of the neutralization reaction, reduces chemical reagent waste, and lowers the treatment cost.

[0033] The water guide pipe 2 is equipped with a flow sensor 2 60 and a flow sensor 3 61. The flow sensor 2 60 and the flow sensor 3 61 are respectively on both sides of the slotted mesh 28. The sensing ends of the flow sensor 2 60 and the flow sensor 3 61 extend into the water guide pipe 2. The system monitors the water flow rate and pressure difference before and after the perforated mesh 28 in real time. When the pressure difference exceeds the preset threshold, it determines that the blockage of the perforated mesh 28 has intensified. The electronic control system automatically increases the speed of the drive motor 36 to enhance the unblocking effect and triggers an alarm. Secondly, an online pH monitor 62 and an online heavy metal analyzer 63 can be installed in the inlet tank 1 to monitor the pH value, heavy metal ion types and concentrations of the inlet water in real time. An online pH monitor 62 can be installed at the outlet end of the water pipe 2 to monitor the pH value of the premixed wastewater in real time. The electrical control system adjusts the operating frequency of the water pump 57 in real time and dynamically adjusts the dosage of chemical reagents based on the monitoring data to ensure stable effluent quality. Specifically, the appropriate method can be selected according to the working conditions and is not limited.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mining acidic heavy metal wastewater recovery and treatment equipment, characterized in that, include: The water inlet chamber (1) is equipped with a primary filtration mechanism (3) for primary filtration of solid particles in the wastewater. The output end of the water inlet chamber (1) is connected to a water guide pipe (2), and the output end of the water guide pipe (2) is connected to the input end of the reaction tank. The protective mechanism (4) is installed inside the water guide pipe (2) and is used to perform secondary filtration of solid particles in the flowing wastewater inside the water guide pipe (2); Two rotating mechanisms (5) are provided, and both are located between the protective mechanism (4) and the output end of the water pipe (2); The driving mechanism (6) is set on the water guide pipe (2) and is used to drive the two rotating mechanisms (5) to rotate synchronously and in opposite directions; The reagent conduit (7) is provided on both of the two rotating mechanisms (5), and the reagent conduit (7) is provided with a plurality of nozzles (9). A reagent supply mechanism (8) is provided on the water pipe (2) for supplying chemical reagents to the two reagent conduits (7).

2. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 1, characterized in that, The primary filtration mechanism (3) includes a filter grid (10), a comb plate (11), a traction assembly (12), a collection chamber (13), a guide rod (14), a return spring (15), a sliding block (16), and a drive rod (17). The filter grid (10) is connected to the water inlet chamber (1) at an inclined angle to the horizontal plane of the water inlet chamber (1). Several filter grooves (18) are equidistantly arranged along a straight line on the filter grid (10). The filter grooves (18) extend straight from the bottom end of the filter grid (10) to the top end. The comb plate (11) is arranged on the filter grid (10). Several cleaning plates (19) are connected to the comb plate (11). The several cleaning plates (19) correspond one-to-one with the several filter grooves (18) and are engaged with each other. Guide rods (14) are connected to both outer walls of the water inlet chamber (1), and the axis of the guide rods (14) is parallel to the inclination direction of the filter grid (10). Sliding blocks (16) are slidably connected to both guide rods (14). The two sliding blocks (16) are connected to the comb plate (11) through the driving rod (17). The reset spring (15) is sleeved on the outside of the guide rods (14), and the two ends of the reset spring (15) are respectively connected to the high end of the guide rods (14) and the sliding blocks (16). The water inlet chamber (1) has a slag outlet hole (20) that penetrates its side wall at the high end of the filter grid (10). The collection chamber (13) is connected to the outer wall of the water inlet chamber (1), and the port of the collection chamber (13) corresponds to the slag outlet hole (20). The output end of the collection chamber (13) is provided with an electric valve (21). The traction assembly (12) is disposed on the water inlet chamber (1), and the traction end of the traction assembly (12) is connected to the comb plate (11). The traction assembly (12) is used to pull the comb plate (11) to slide along the extension direction of the filter tank (18).

3. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 2, characterized in that, The traction assembly (12) includes a motor mounting plate (22), a drive motor (23), a winch (24), a traction rope (25), and two bearings (26). The motor mounting plate (22) is installed on the outer wall of the water inlet chamber (1) and is located above the collection chamber (13). Two bearings (26) are connected to the motor mounting plate (22). A bearing shaft (27) is rotatably connected to the two bearings (26). The winch (24) is coaxially connected to the bearing shaft (27). The traction rope (25) is wound on the winch (24) and one end of the traction rope (25) is connected to the comb plate (11). The drive motor (23) is installed on the motor mounting plate (22) and the output end of the drive motor (23) is coaxially connected to the bearing shaft (27).

4. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 1, characterized in that, The protective mechanism (4) includes a perforated mesh (28), several arc-shaped scrapers (29), a rotating column (30), a rotating shaft (31), a sealed gearbox (32), a drive shaft one (33), a rotating bevel gear one (34), a rotating bevel gear two (35), and a drive motor two (36). Among them, the slotted mesh (28) is arranged radially along the water guide pipe (2), the rotating column (30) is located at the position of the slotted mesh (28) near the input end of the water guide pipe (2), a number of arc-shaped scrapers (29) are equidistantly arranged around the axis of the rotating column (30), and each arc-shaped scraper (29) abuts against the surface of the slotted mesh (28), the sealed gearbox (32) is fixedly connected to the water guide pipe (2) by a fixing rod (320), the first rotating bevel gear (34) and the second rotating bevel gear (35) are both located in the sealed gearbox (32), and the rotating shaft (31) and the rotating column ( 30) Coaxial connection, one end of the rotating shaft (31) passes through the sealed gearbox (32) and is connected to the second rotating bevel gear (35), and the rotating shaft (31) and the sealed gearbox (32) are sealed and rotatably connected. The second drive motor (36) is installed on the outer wall of the water guide pipe (2). The output end of the second drive motor (36) is coaxially connected to one end of the first drive shaft (33). The other end of the first drive shaft (33) passes through the sealed gearbox (32) and is connected to the first rotating bevel gear (34), and the first drive shaft (33) and the sealed gearbox (32) are sealed and rotatably connected.

5. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 4, characterized in that, A sedimentation tank (37) is provided on the side wall of the water guide pipe (2), and the sedimentation tank (37) is connected to the inside of the water guide pipe (2). An electric valve (38) is provided at the bottom of the sedimentation tank (37). A material level sensor (39) is provided on the side wall of the sedimentation tank (37). The sensing end of the material level sensor (39) extends into the inside of the sedimentation tank (37). The sedimentation tank (37) is located on the side of the perforated mesh (28) near the input end of the water guide pipe (2), and is located below one side of the perforated mesh (28).

6. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 1, characterized in that, Both of the aforementioned rotating mechanisms (5) include a fixed bracket (40), a rotating tube (41), and several inclined blades (42); The fixed bracket (40) is connected to the inner wall of the water guide pipe (2) along the diameter of the water guide pipe (2), the rotating pipe (41) is rotatably connected to the fixed bracket (40), and several inclined blades (42) are arranged to extend radially along the water guide pipe (2) and are equidistant from the axis of the rotating pipe (41).

7. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 6, characterized in that, The drive mechanism (6) includes a sealing tube (43), two drive bevel gears (44), a drive bevel gear (45), a drive shaft (46), a drive motor (47), a bearing (48), and a sealing ring (49). The sealing tube (43) is located between the two rotating mechanisms (5), and the two ends of the sealing tube (43) are respectively sealed and rotatably connected to the ends of the rotating tubes (41) on the two rotating mechanisms (5). The axis of the sealing tube (43) coincides with the axis of the two rotating tubes (41). The second drive shaft (46) extends radially along the water guide pipe (2). The third drive motor (47) is installed on the outer wall of the water guide pipe (2). The output end of the third drive motor (47) is coaxially connected to one end of the second drive shaft (46). The second drive bevel gear (45) is coaxially connected to the other end of the second drive shaft (46). The two first drive bevel gears (44) are rotatably connected to the sealing tube (43) through the second bearing (48). The two first drive bevel gears (44) are respectively coaxially connected to the rotating tubes (41) on the two rotating mechanisms (5).

8. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 7, characterized in that, Each of the inclined blades (42) is provided with a reagent conduit (7), which is arranged along the extension direction of the inclined blades (42), and two adjacent reagent conduits (7) are connected to each other; The reagent supply mechanism (8) includes a supply tube (50), a fixed tube (51), a rotary joint (52), and an input tube; wherein, the supply tube (50) is provided in the rotary tube (41) on both of the rotary mechanisms (5), the output end of the supply tube (50) is connected to one of the corresponding reagent conduits (7), the input end of the supply tube (50) is connected to the end of the fixed tube (51) through the rotary joint (52), and the fixed tube (51) is fixedly connected in the sealing tube (43).

9. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 8, characterized in that, The input pipe is composed of input pipe one (53) and input pipe two (54), and the output end of input pipe one (53) is connected to the fixed pipe (51); The reagent supply mechanism (8) further includes a storage tank (55), a liquid level sensor (56), and a water pump (57); wherein, the input end of the first input pipe (53) is connected to the output end of the water pump (57), a flow sensor (58) is provided on the first input pipe (53), the output end of the second input pipe (54) is connected to the input end of the water pump (57), the input end of the second input pipe (54) extends into the storage tank (55), the storage tank (55) is provided on the water guide pipe (2), the liquid level sensor (56) is installed on the storage tank (55), its sensing end extends into the storage tank (55), a support plate (59) is connected to the water guide pipe (2), and the water pump (57) is installed on the support plate (59).

10. The equipment for recovering and treating acidic heavy metal wastewater from mines according to claim 5, characterized in that, The water guide pipe (2) is equipped with a flow sensor two (60) and a flow sensor three (61). The flow sensor two (60) and the flow sensor three (61) are respectively on both sides of the perforated mesh (28). The sensing ends of the flow sensor two (60) and the flow sensor three (61) extend into the water guide pipe (2).

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