Non-ferrous metal mine wastewater treatment equipment

Abstract

This invention relates to the field of mine wastewater treatment technology, particularly wastewater treatment equipment for non-ferrous metal mines. The equipment includes a wastewater sedimentation unit, a deep electrolysis unit, and a chemical dosing and purification unit. A sedimentation inlet pipe with a power pump and a sludge discharge pipe are spaced apart on the lower outer wall of the wastewater sedimentation unit. A first pipeline is installed at a primary supernatant pipe joint located in the middle of the wastewater sedimentation unit. The outlet end of the first pipeline is connected to the inlet end of the deep electrolysis unit. A second pipeline is connected to the outlet end of the deep electrolysis unit, and the outlet end of the second pipeline is connected to the inlet end of the chemical dosing and purification unit. This equipment can efficiently perform sedimentation, filtration, and electrolytic removal of heavy metals from wastewater with high heavy metal content, effectively ensuring the treatment effect during wastewater treatment. It effectively combines physical sedimentation, electrolysis, and biological chemical dosing to achieve the main purification treatment of wastewater.

Description

Technical Field

[0001] This invention relates to the field of mine wastewater treatment technology, and in particular to wastewater treatment equipment for non-ferrous metal mines. Background Technology

[0002] Non-ferrous metal mine wastewater refers to wastewater containing pollutants such as heavy metals, acidic substances, and organic matter generated during the production processes of non-ferrous metal mining, beneficiation, and smelting.

[0003] The main sources of wastewater from non-ferrous metal mines include the following three aspects: First, wastewater containing heavy metals, mineral particles, and beneficiation reagents generated during ore mining; second, large amounts of wastewater containing heavy metal ions, suspended solids, and beneficiation reagents generated during ore crushing, grinding, flotation, and other processes; and third, wastewater containing heavy metal dust, sulfur dioxide, and other pollutants generated during smelting. As can be seen from its sources, non-ferrous metal mine wastewater is characterized by its complex composition, high toxicity, and difficulty in treatment.

[0004] Currently, the treatment of wastewater from non-ferrous metal mines in existing technologies is mainly determined by a comprehensive consideration of factors such as the composition, concentration, and discharge standards of the wastewater.

[0005] A search revealed a prior art document with patent application number CN202411056250.7 that discloses a device and method for treating acidic wastewater from non-ferrous metal mines. The device mainly includes an electrochemical treatment system and a low-temperature treatment system connected to the electrochemical treatment system. The low-temperature treatment system includes a sedimentation tank, a low-temperature treatment tank, a drain pipe, and a reheat tank connected in sequence. The low-temperature treatment tank is equipped with a filter assembly, a pressurizing device, and a cooling device to create a pressurized low-temperature environment inside the low-temperature treatment tank.

[0006] It can be seen that by keeping the ambient temperature below -5℃, crystal impurities are precipitated, thereby improving the removal effect of wastewater impurities.

[0007] However, the use of low-temperature control in the treatment of hazardous substances requires a large amount of energy, especially when the wastewater volume is large. The energy consumption for treating one ton of wastewater is huge, so it is not suitable for long-term treatment of wastewater from non-ferrous metal mines with high heavy metal content.

[0008] Based on this, the present invention optimizes the colorant in the existing technology for treating wastewater from non-ferrous metal mines, and proposes a new wastewater treatment device for non-ferrous metal mines to better solve the problems existing in the prior art. Summary of the Invention

[0009] To solve one of the aforementioned technical problems, the present invention employs the following technical solution: a wastewater treatment device for non-ferrous metal mines, comprising a wastewater sedimentation unit, a deep electrolysis unit, and a chemical dosing and purification unit. A sedimentation inlet pipe equipped with a power pump and a sludge discharge pipe are respectively and spaced apart on the lower outer wall of the wastewater sedimentation unit. The sedimentation inlet pipe receives wastewater from upstream that has undergone preliminary filtration. The sludge discharge pipe is used to periodically discharge the sludge accumulated at the lower part of the wastewater sedimentation unit. A first pipeline is installed at a primary supernatant pipe joint located in the middle of the wastewater sedimentation unit. The outlet end of the first pipeline is connected to the inlet end of the deep electrolysis unit. A first delivery pump is installed on the first pipeline. A second pipeline is connected to the outlet end of the deep electrolysis unit. A second delivery pump is installed on the second pipeline. The outlet end of the second pipeline is connected to the inlet end of the chemical dosing and purification unit. The outlet end of the chemical dosing and purification unit is used to connect to a downstream water treatment station.

[0010] In any of the above embodiments, preferably, the wastewater sedimentation unit includes a sedimentation tank with an open top, and a filtration unit is installed in the lower part of the inner cavity of the sedimentation tank. The filtration unit divides the sedimentation tank into an upper water collection chamber and a lower sludge collection chamber. The sedimentation inlet pipe and the sludge discharge pipe are both installed on the lower outer wall of the sedimentation tank and are both connected to the interior of the sludge collection chamber. The primary supernatant pipe connector is located in the upper part of the filtration unit and its interior is connected to the interior of the water collection chamber.

[0011] In any of the above embodiments, it is preferred that the filtration unit includes a built-in frame horizontally installed inside the water collection chamber, the outer side wall of the built-in frame is movably abutted against the inner side wall of the water collection chamber, filter media is placed in the filter chamber inside the built-in frame, and a primary filter screen and a secondary filter screen are fixedly installed at the openings at the bottom and top of the built-in frame, respectively.

[0012] In any of the above embodiments, it is preferred that the mesh size of the primary filter is larger than that of the secondary filter.

[0013] In any of the above embodiments, it is preferred that a lifting ring is fixedly welded to the top center of the primary filter screen.

[0014] In any of the above embodiments, it is preferred that lifting telescopic rods are respectively provided on both sides of the bottom of the built-in frame, the bottom of each lifting telescopic rod is fixed to the bottom of the mud collection cavity, and the top of the telescopic end of each lifting telescopic rod is fixed to the bottom of the built-in frame.

[0015] Preferably, in any of the above embodiments, the deep electrolysis unit includes a cylindrical electrolytic cell, the bottom of which is fixedly installed on the top of the support frame. A collection space is provided between the support frame and the bottom of the cylindrical electrolytic cell. The collection space is used for operators to collect heavy metal precipitates. A sediment discharge component is installed inside the collection space, and the top of the sediment discharge component is installed at the bottom of the cylindrical electrolytic cell and communicates with its interior. A two-stage electrolysis mechanism is installed in the center of the electrolysis chamber of the cylindrical electrolytic cell. The tops of the two-stage electrolysis mechanism are respectively connected to the power output end of a fixedly installed central drive component. A wastewater feed component is installed on the upper left side of the cylindrical electrolytic cell, and a clear liquid suction component is installed on the upper right side of the cylindrical electrolytic cell. The wastewater feed component is connected to the outlet end of the first pipeline, and the clear liquid suction component is connected to the inlet end of the second pipeline.

[0016] In any of the above embodiments, preferably, the dual-stage electrolysis mechanism includes an annular diaphragm assembly fixedly installed at the bottom center of the electrolysis chamber of the cylindrical electrolysis cell, a central fixing disk fixedly installed at the top of the annular diaphragm assembly, and a central drive component fixedly installed at the center of the top of the central fixing disk. The annular diaphragm assembly divides the electrolysis chamber into a central electrolysis inner cavity and an annular electrolysis outer cavity. A first electrode plate is installed inside the central electrolysis inner cavity, and a second electrode plate is installed inside the annular electrolysis outer cavity. The first electrode plate and the second electrode plate are arranged opposite to each other and cooperate to perform electrolysis when energized. In the working state, the first electrode plate and the second electrode plate are controlled by a configured electrode controller to alternately use as an anode plate or a cathode plate.

[0017] In any of the above embodiments, it is preferred that the annular membrane assembly includes a mounting disk coaxially fixedly installed at the center bottom of the electrolysis chamber, and a plurality of positioning columns are fixedly installed at uniform intervals along the circumference of the top of the mounting disk. An ion exchange membrane is fixedly installed on the inner side of each positioning column. The ion exchange membrane is used to separate the inner cavity of the electrolysis center from the outer cavity of the electrolysis annular cavity and allow the passage of anions and cations. A positioning cover is fixedly installed on the top of each positioning column. A through hole is provided on the top of the positioning cover for the wastewater feeding component to enter the outer cavity of the electrolysis annular cavity and the clear liquid suction component to enter the inner cavity of the electrolysis center.

[0018] In any of the above embodiments, it is preferred that the first electrode plate includes a first electrode plate fixedly installed at the inner center of the inner cavity of the electrolysis center, a central upper plate seat and a central lower plate seat fixedly installed at the upper and lower ends of the first electrode plate, and inner arc-shaped bearings installed at the front and rear ends of the central upper plate seat and the central lower plate seat, respectively. The two inner arc-shaped bearings are symmetrically arranged and their outer side walls are respectively movably pressed against the inner wall of the inner cavity of the electrolysis center. The top center of the central upper plate seat is fixedly connected to the first output end of the central drive member. When the central drive member works, it drives the central upper plate seat, the central lower plate seat, the first electrode plate and the inner arc-shaped bearings on both sides to swing back and forth around the central axis of the inner cavity of the electrolysis center.

[0019] In any of the above embodiments, it is preferred that the second electrode plate includes two second electrode plates disposed opposite to each other inside the electrolytic annular outer cavity. The two second electrode plates are respectively symmetrically disposed on both sides of the first electrode plate. An outer arc-shaped bearing is fixedly installed on the front and rear sides of the upper and lower ends of each second electrode plate. The outer side wall of each outer arc-shaped bearing is movably abutting against the inner wall of the electrolytic annular outer cavity. The top center of each second electrode plate is fixedly connected to the output end of the central drive member. When the central drive member is working, it drives the first electrode plate and each second electrode plate to reciprocate around the central axis of the electrolytic central inner cavity.

[0020] In any of the above schemes, it is preferred that the two second electrode plates and the first electrode plate complete the low-speed mixing and stirring of the wastewater solution inside the outer annular cavity and the inner cavity of the electrolysis center during the oscillation process.

[0021] In addition, by keeping the first and second electrodes, which are used alternately as anode and cathode plates, in motion, the phenomenon of bubbles in the electrolyte adhering to the electrode surface is effectively reduced; the timely removal of bubbles helps to maintain sufficient contact between the electrolyte and the electrode surface, thereby improving the efficiency of the electrolysis reaction.

[0022] By using a sandwich structure of two anode plates and one cathode plate, or two cathode plates and one anode plate, the effective area in the electrolysis process can be increased, thereby improving the current density and electrolysis efficiency; making the electrolysis reaction more uniform, reducing local overheating or overcooling, and facilitating a stable electrolysis process.

[0023] At the same time, it helps to improve the mass transfer process in the electrolyte; ions in the wastewater are more likely to migrate to the electrode surface under the action of the electric field, which accelerates the electrochemical reaction and improves the overall electrolysis efficiency.

[0024] In any of the above embodiments, it is preferred that the sediment discharge component includes a sediment collection pipe installed inside the collection space, and an inner collection pipe and an outer collection pipe with control valves are respectively connected to the top of both ends of the sediment collection pipe via a tee. The top of each inner collection pipe is fixed to the bottom of the cylindrical electrolytic cell and communicates with the interior of the electrolysis center cavity, and the top of each outer collection pipe is fixed to the bottom of the cylindrical electrolytic cell and communicates with the interior of the electrolysis annular outer cavity.

[0025] In any of the above embodiments, it is preferred that there are two second electrode plates, and the two second electrode plates are symmetrically arranged in the electrolytic annular outer cavity on both sides of the first electrode plate. The tops of the two second electrode plates and the top of the first electrode plate are respectively connected to the corresponding output end of the central drive. When the central drive works, it can simultaneously drive the first electrode plate and the two second electrode plates to periodically reciprocate around the central axis of the electrolytic central cavity.

[0026] In any of the above embodiments, it is preferred that the first electrode plate and the second electrode plate are used alternately as the anode plate and the cathode plate.

[0027] In any of the above embodiments, it is preferred that, under the action of the central driving member, the two-stage electrolysis mechanism can achieve fixed-axis reciprocating swing around the central axis of the cylindrical electrolysis cell. In the working state, the two-stage electrolysis mechanism is used to precipitate heavy metal impurities in the wastewater in the cylindrical electrolysis cell and form metal precipitates that accumulate at the bottom of the cylindrical electrolysis cell.

[0028] In any of the above embodiments, preferably, the central drive component includes a dual-axis servo motor fixedly mounted on the top center of the positioning cover. The lower output shaft of the dual-axis servo motor movably passes through the central hole of the positioning cover and extends into the inner cavity of the electrolysis center, where it is fixedly connected to the top center of the central upper plate seat. A top connecting plate is fixedly mounted on the top of the upper output shaft of the dual-axis servo motor. Output connecting vertical shafts are fixedly mounted on the bottom of both ends of the top connecting plate. The bottom of each output connecting vertical shaft is fixedly connected to the top center of the corresponding second electrode plate below it. Arc-shaped constraint grooves are respectively provided on the top of both sides of the top connecting plate for the lower ends of the wastewater feeding component and the clear liquid suction component to pass through.

[0029] When the top connecting plate is working, it reciprocates at a fixed angle under the drive of the dual-axis servo motor, and does not interfere with the movement of the wastewater feeding component or the clear liquid suction component during the swing.

[0030] An electrode controller is fixedly installed at the top center of the top connecting plate. The electrode controller is connected to the two second electrode plates and the first electrode plate and controls the second electrode plate and the first electrode plate to be used alternately as the anode plate and the cathode plate.

[0031] In any of the above embodiments, it is preferred that the wastewater feeding component includes a first riser connected to the outlet end of the first pipeline, a first multi-port pipe installed at the bottom of the first riser, and a central inlet pipe and an outer cavity inlet pipe respectively installed at the bottom of the two branch pipes with valves of the first multi-port pipe for communicating with the interior of the electrolysis center cavity and the interior of the electrolysis annular outer cavity.

[0032] The upper end of the first riser extends upwards to the top of the arc-shaped constraint groove.

[0033] In any of the above embodiments, preferably, the clear liquid suction component includes a second riser connected to the inlet end of the second pipeline, a second multi-port pipe installed at the bottom of the second riser, and a central suction pipe and an outer suction pipe respectively installed at the bottom of the two branch pipes with valves of the second multi-port pipe for communicating with the interior of the electrolysis center cavity and the electrolysis annular outer cavity. Corrugated telescopic pipe sections are respectively provided at the lower part of the central suction pipe and the lower part of the outer suction pipe. A connecting plate is fixed at the bottom of each corrugated telescopic pipe section, and a control telescopic rod is fixedly installed on one side of each connecting plate. The top of each control telescopic rod is fixed to the bottom of the central fixed plate, and the bottom of each control telescopic rod is fixed to the top side of the connecting plate. The control telescopic rod drives the corrugated telescopic pipe section to extend and retract in the vertical direction through its own extension and retraction.

[0034] The upper end of the second riser extends upwards to the top of the arc-shaped constraint groove.

[0035] In any of the above embodiments, it is preferred that the dosing and purification unit includes a dosing tank, the inlet end of which is connected to the outlet end of the second pipeline, the outlet end of which is connected to the downstream water treatment station through a pipeline, and a dosing chamber connected to the interior of the dosing tank is installed on the top of the dosing tank.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The non-ferrous metal mine wastewater treatment equipment set in this invention can efficiently perform sedimentation, filtration and electrolytic extraction of heavy metals in wastewater with high heavy metal content, effectively ensuring the treatment effect in wastewater treatment, and effectively cooperating with physical sedimentation, electrolysis and biological dosing to achieve the main purification treatment of wastewater.

[0038] 2. In this invention, the bottom water inlet and top overflow method is used to effectively ensure the filtration effect of wastewater and effectively control the impurities in the wastewater to be located at the bottom for easy subsequent centralized accumulation and discharge.

[0039] 3. The deep electrolysis unit in this invention adopts a stirring-while-electrolyzing method, which can effectively improve the flowability of wastewater during the electrolysis process, effectively improve the electrolysis effect, and improve the precipitation of heavy metal precipitates during the electrolysis process.

[0040] 4. This invention addresses the treatment of non-ferrous metal mine wastewater with high heavy metal content. Electrolysis is used to achieve rapid precipitation of heavy metals from the wastewater. The first electrode plate in the center is held between two second electrode plates on both sides, and the first and second electrode plates are used alternately as anode and cathode plates to control the electrolysis effect during the electrolysis process. This allows for the alternating precipitation of metal precipitates in the inner cavity of the electrolysis center and the outer cavity of the electrolysis annulus.

[0041] 5. When the first and second plates in the deep electrolysis unit alternate as anode and cathode plates, they can complete a fixed-axis, fixed-angle reciprocating swing under the driving action of the central drive component, effectively reducing the phenomenon of bubbles in the electrolyte adhering to the electrode surface; the timely removal of bubbles helps to maintain sufficient contact between the electrolyte and the electrode surface, thereby improving the efficiency of the electrolysis reaction. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0043] Figure 1 This is a schematic diagram of the structure of the present invention.

[0044] Figure 2 This is a schematic diagram of the internal structure of the deep electrolysis unit of the present invention.

[0045] Figure 3 for Figure 2 A locally enlarged structural diagram of the AA direction.

[0046] Figure 4 for Figure 2 A magnified schematic diagram of the BB-direction structure.

[0047] Figure 5 for Figure 2 A locally magnified structural diagram in the CC direction.

[0048] Figure 6This is a top view of the various positioning columns in this invention after the mounting disc is installed.

[0049] In the diagram, 1. First pipeline; 2. First transfer pump; 3. Second pipeline; 4. Second transfer pump; 5. Sedimentation tank; 6. Water collection chamber; 7. Sludge collection chamber; 8. Sedimentation inlet pipe; 9. Sludge discharge pipe; 10. First-stage supernatant pipe connector; 11. Internal frame; 12. Filter media; 13. First-stage filter screen; 14. Second-stage filter screen; 15. Lifting ring; 16. Lifting telescopic rod; 17. Cylindrical electrolytic cell; 18. Support frame; 19. Collection space; 20. Central fixing plate; 21. Electrolysis center inner cavity; 22. Electrolysis annular outer cavity; 23. Electrode controller; 24. First riser; 25. First multi-port pipe; 26. Central inlet pipe; 27. Outer cavity inlet pipe. 28. Liquid pipe; 29. ​​Second riser; 30. Second multi-port pipe; 31. Central liquid suction pipe; 32. External liquid suction pipe; 33. Corrugated telescopic pipe section; 34. Connecting plate; 35. Control telescopic rod; 36. Dosing tank; 37. Dosing chamber; 38. Mounting disc; 39. Positioning column; 40. Ion exchange membrane; 41. Positioning top cover; 42. First electrode plate; 43. Central upper plate seat; 44. Central lower plate seat; 45. Inner arc-shaped bearing; 46. Second electrode plate; 47. Outer arc-shaped bearing; 48. Sediment collection pipe; 49. Inner collection pipe; 50. Outer collection pipe; 51. Dual-axis servo motor; 52. Top connecting plate; 53. Output connecting shaft; 54. Arc-shaped constraint groove. Detailed Implementation

[0050] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore merely examples and should not be used to limit the scope of protection of the present invention. The specific structure of the present invention is as follows: Figures 1-6 As shown in the image.

[0051] Example 1: Wastewater treatment equipment for non-ferrous metal mines includes a wastewater sedimentation unit, a deep electrolysis unit, and a chemical dosing and purification unit. A sedimentation inlet pipe 8 with a power pump and a sludge discharge pipe 9 are respectively and spaced apart on the lower outer wall of the wastewater sedimentation unit. The sedimentation inlet pipe 8 receives wastewater from upstream after preliminary filtration. The sludge discharge pipe 9 is used to periodically discharge the sludge accumulated at the bottom of the wastewater sedimentation unit. A first pipeline 1 is installed at a primary supernatant pipe joint 10 located in the middle of the wastewater sedimentation unit. The outlet end of the first pipeline 1 is connected to the inlet end of the deep electrolysis unit. A first transfer pump 2 is installed on the first pipeline 1. A second pipeline 3 is connected to the outlet end of the deep electrolysis unit. A second transfer pump 4 is installed on the second pipeline 3. The outlet end of the second pipeline 3 is connected to the inlet end of the chemical dosing and purification unit. The outlet end of the chemical dosing and purification unit is used to connect to a downstream water treatment station.

[0052] In the non-ferrous metal mine wastewater treatment equipment of this invention, when further treating the wastewater from upstream that has undergone preliminary filtration, the wastewater is introduced into a wastewater sedimentation unit for static sedimentation. The supernatant after sedimentation is then diverted to a deep electrolysis unit for deep electrolysis treatment. During the deep electrolysis treatment, most of the heavy metals in the wastewater can be removed, and the technical precipitates formed by the heavy metals are discharged at the bottom. The supernatant at the top continues to be diverted to a downstream chemical dosing and purification unit. After entering the chemical dosing and purification unit, the supernatant is further purified by adding chemicals.

[0053] During the wastewater diversion process, the first transfer pump 2 and the second transfer pump 4 are controlled to operate as needed to ensure the flow rate is controlled during the transfer process.

[0054] In any of the above embodiments, it is preferred that the wastewater sedimentation unit includes a sedimentation tank 5 with an open top, and a filter unit is installed in the lower part of the inner cavity of the sedimentation tank 5. The filter unit divides the sedimentation tank 5 into a water collection chamber 6 located at the top and a sludge collection chamber 7 located at the bottom. The sedimentation inlet pipe 8 and the sludge discharge pipe 9 are both installed on the lower outer wall of the sedimentation tank 5 and are both connected to the interior of the sludge collection chamber 7. The primary supernatant pipe connector 10 is located at the top of the filter unit and its interior is connected to the interior of the water collection chamber 6.

[0055] In the wastewater sedimentation unit, wastewater is deposited inside the sedimentation tank 5. After sedimentation, solid impurities or sludge accumulate at the bottom of the sludge collection chamber 7, while supernatant is deposited in the upper water collection chamber 6. By periodically opening the first pipeline 1, the water inside the water collection chamber 6 can be continuously transported downstream. When it is necessary to clean the impurities inside the sludge collection chamber 7, the sludge discharge pipe 9 is controlled to discharge the material outward.

[0056] In any of the above embodiments, the preferred embodiment is that the filtration unit includes a built-in frame 11 horizontally installed inside the water collection cavity 6, the outer side wall of the built-in frame 11 is movably abutted against the inner side wall of the water collection cavity 6, a filter media 12 is placed in the filter cavity inside the built-in frame 11, and a primary filter screen 13 and a secondary filter screen 14 are fixedly installed at the bottom and top openings of the built-in frame 11, respectively.

[0057] It should be noted that the filtration unit in this invention mainly relies on the primary filter screen 13, the secondary filter screen 14, and the filter media 12 to achieve multi-stage filtration. When the wastewater slowly enters the sludge collection chamber 7 through the sedimentation inlet pipe 8, the liquid level will continuously rise. Finally, under the action of the filtration unit, larger impurities will be deposited at the bottom, and the supernatant will accumulate inside the water collection chamber 6.

[0058] In any of the above embodiments, it is preferred that the mesh size of the primary filter 13 is larger than that of the secondary filter 14.

[0059] In any of the above embodiments, it is preferred that a lifting ring 15 is fixedly welded to the top center of the primary filter screen 13.

[0060] The lifting ring 15 allows for easy periodic removal and cleaning of the entire filter unit.

[0061] In any of the above embodiments, it is preferred that lifting telescopic rods 16 are respectively provided on both sides of the bottom of the built-in frame 11, the bottom of each lifting telescopic rod 16 is fixed to the bottom of the mud collection cavity 7, and the top of the telescopic end of each lifting telescopic rod 16 is fixed to the bottom of the built-in frame 11.

[0062] Controlling the lifting height of each lifting telescopic rod 16 can control the volume of the sludge collection chamber 7, thereby facilitating the control of sedimentation effect for wastewater with different sludge contents.

[0063] Preferably, in any of the above embodiments, the deep electrolysis unit includes a cylindrical electrolytic cell 17, the bottom of which is fixedly mounted on the top of a support frame 18. A collection space 19 is provided between the support frame 18 and the bottom of the cylindrical electrolytic cell 17. The collection space 19 is used for operators to collect heavy metal precipitates. A sediment discharge component is installed inside the collection space 19, and the top of the sediment discharge component is mounted on the cylindrical electrolytic cell 17. The bottom of the cylindrical electrolytic cell 17 is connected to its interior. A two-stage electrolysis mechanism is installed inside the center of the electrolysis chamber. The top of the two-stage electrolysis mechanism is connected to the power output end of a fixed central drive component. A wastewater feed component is installed on the upper left side of the cylindrical electrolytic cell 17, and a clear liquid suction component is installed on the upper right side of the cylindrical electrolytic cell 17. The wastewater feed component is connected to the outlet end of the first pipeline 1, and the clear liquid suction component is connected to the inlet end of the second pipeline 3.

[0064] It should be noted that when the deep electrolysis unit is working, the wastewater transported by the first pipeline 1 enters the cylindrical electrolysis cell 17 directly through the wastewater feeding component and stops transporting wastewater after reaching the set amount; the two-stage electrolysis mechanism is started to carry out electrolysis. During the electrolysis process, the periodic reciprocating operation of the control center drive component can drive the two-stage electrolysis mechanism to perform electrolysis while slowly stirring the wastewater inside, thereby improving the electrolysis effect.

[0065] In any of the above embodiments, preferably, the dual-stage electrolysis mechanism includes an annular diaphragm assembly fixedly installed at the bottom center of the electrolysis chamber of the cylindrical electrolysis cell 17, a central fixing disk 20 fixedly installed at the top of the annular diaphragm assembly, and a central drive component fixedly installed at the top center of the central fixing disk 20. The annular diaphragm assembly divides the electrolysis chamber into an inner electrolysis cavity 21 and an outer annular electrolysis cavity 22 located at the center. A first electrode plate is installed inside the inner electrolysis cavity 21, and a second electrode plate is installed inside the outer annular electrolysis cavity 22. The first electrode plate and the second electrode plate are arranged opposite to each other and cooperate to realize electrolysis when energized. In the working state, the first electrode plate and the second electrode plate are controlled by a configured electrode controller 23 to alternately use as an anode plate or a cathode plate.

[0066] The presence of the annular diaphragm assembly divides the electrolytic cell into an inner electrolytic cavity 21 and an annular outer electrolytic cavity 22. During operation of the dual-stage electrolysis mechanism, the first and second electrode plates alternately serve as the anode and cathode plates, respectively. This electrolysis process, energized by the anode and cathode plates, allows for the continuous precipitation of metal deposits. It should be noted that before the anode and cathode plates alternate, the metal deposits at the bottom of the corresponding sections of the inner electrolytic cavity 21 and the annular outer electrolytic cavity 22 must be sequentially cleaned and discharged.

[0067] In any of the above embodiments, it is preferred that the wastewater feeding component includes a first riser 24 connected to the outlet end of the first pipeline 1, a first multi-port pipe 25 installed at the bottom of the first riser 24, and a central inlet pipe 26 and an outer cavity inlet pipe 27 respectively installed at the bottom of the two branch pipes with valves of the first multi-port pipe 25 for communicating with the interior of the electrolysis center cavity 21 and the electrolysis annular outer cavity 22.

[0068] The upper end of the first riser 24 extends upward to the top of the arc-shaped constraint groove 53.

[0069] When the wastewater feeding component is working, the pump body on the first pipeline 1 provides the conveying power, and the wastewater is directly conveyed to the inner cavity 21 of the electrolysis center and the outer cavity 22 of the electrolysis ring through the two branch pipes with valves on the first multi-port pipe 25, thereby completing the synchronous liquid delivery.

[0070] In any of the above embodiments, it is preferred that the clear liquid drawing component includes a second riser 28 connected to the inlet end of the second pipeline 3, a second multi-port pipe 29 installed at the bottom of the second riser 28, and a central liquid drawing pipe 30 and an outer liquid drawing pipe 31 respectively installed at the bottom of the two branch pipes with valves of the second multi-port pipe 29 for communicating with the interior of the electrolysis center inner cavity 21 and the electrolysis annular outer cavity 22. Corrugated telescopic pipe sections 32 are respectively provided at the lower part of the central liquid drawing pipe 30 and the lower part of the outer liquid drawing pipe 31. A connecting plate 33 is fixed at the bottom of each corrugated telescopic pipe section 32, and a control telescopic rod 34 is fixedly installed on one side of each connecting plate 33. The top of each control telescopic rod 34 is fixed to the bottom of the central fixed plate 20, and the bottom of each control telescopic rod 34 is fixed to the top side of the connecting plate 33. The control telescopic rod 34 drives the corrugated telescopic pipe section 32 to extend and retract in the vertical direction through its own extension and retraction.

[0071] The upper end of the second riser 28 extends upward to the top of the arc-shaped constraint groove 53.

[0072] After the wastewater in the inner cavity 21 of the electrolysis center and the outer annular cavity 22 of the electrolysis ring undergoes sufficient electrolysis treatment, the metal precipitates accumulated at the bottom of the inner cavity 21 of the electrolysis center and the outer annular cavity 22 of the electrolysis ring are discharged. At the same time, the wastewater in the inner cavity 21 of the electrolysis center and the outer annular cavity 22 after heavy metal removal is precipitated. Finally, the downward movement of the clear liquid suction component is controlled to realize the rapid downstream transport of the water in the inner cavity 21 of the electrolysis center and the outer annular cavity 22 of the electrolysis ring.

[0073] Because of the control telescopic rod 34 and the corrugated telescopic tube section 32, the extension or shortening of the control telescopic rod 34 can be controlled to move the bottom of the corrugated telescopic tube section 32 upward or downward, so as to draw the supernatant from different depths upward.

[0074] In any of the above embodiments, it is preferred that the dosing and purification unit includes a dosing tank 35, the inlet end of the dosing tank 35 is connected to the outlet end of the second pipeline 3, the outlet end of the dosing tank 35 is connected to the downstream water treatment station through a pipeline, and a dosing chamber 36 communicating with the interior of the dosing tank 35 is installed on the top of the dosing tank 35.

[0075] The supernatant after electrolysis is directly transported to the dosing chamber 36 and then enters the dosing tank 35. The required reagents are then added into the dosing tank 35 as needed to complete the dosing treatment.

[0076] Example 2: Compared with Example 1, this example differs in that it also includes the following technical features:

[0077] In any of the above embodiments, it is preferred that the annular diaphragm assembly includes a mounting disk 37 coaxially fixedly installed at the bottom center of the electrolysis chamber. A plurality of positioning columns 38 are fixedly installed at uniform intervals along the circumference of the top of the mounting disk 37. An ion exchange membrane 39 is fixedly installed on the inner side of each positioning column 38. The ion exchange membrane 39 is used to separate the inner cavity 21 of the electrolysis center from the outer annular electrolysis cavity 22 and allow the passage of anions and cations. A positioning cover 40 is fixedly installed on the top of each positioning column 38. A through hole is provided on the top of the positioning cover 40 for the wastewater feed component to enter the outer annular electrolysis cavity 22 and for the clear liquid suction component to enter the inner cavity 21 of the electrolysis center.

[0078] During electrolysis, the annular diaphragm assembly of this invention forms an outer frame for the fixed installation of the ion exchange membrane 39 by means of the mounting disk 37 and several positioning columns 38, so as to ensure the relative stability of the ion exchange membrane 39 after installation. The ion exchange membrane 39 can divide the electrolysis chamber into an inner electrolysis center 21 located in the center and an outer annular electrolysis center 22 located on the periphery. When the two-stage electrolysis mechanism starts electrolysis, the inner electrolysis center 21 located in the center and the outer annular electrolysis center 22 located on the periphery can perform ion exchange respectively. Since the polarity of the electrode plates inside the inner electrolysis center 21 located in the center and the outer annular electrolysis center 22 located on the periphery can be alternately changed, the metal can be controlled to be collected and discharged after precipitation at the corresponding position (as the position corresponding to the cathode plate) as needed.

[0079] In any of the above embodiments, preferably, the first electrode plate includes a first electrode plate 41 fixedly installed at the inner center of the electrolysis center cavity 21. A central upper plate seat 42 and a central lower plate seat 43 are fixedly installed at the upper and lower ends of the first electrode plate 41, respectively. Inner arc-shaped bearings 44 are installed at the front and rear ends of the central upper plate seat 42 and the central lower plate seat 43, respectively. The two inner arc-shaped bearings 44 are symmetrically arranged and their outer side walls are movably pressed against the inner wall of the electrolysis center cavity 21. The top center of the central upper plate seat 42 is fixedly connected to the first output end of the central drive member. When the central drive member works, it drives the central upper plate seat 42, the central lower plate seat 43, the first electrode plate 41 and the inner arc-shaped bearings 44 on both sides to swing back and forth around the central axis of the electrolysis center cavity 21.

[0080] In any of the above embodiments, it is preferred that the second electrode plate includes two second electrode plates 45 disposed opposite to each other inside the electrolytic annular outer cavity 22. The two second electrode plates 45 are respectively symmetrically disposed on both sides of the first electrode plate 41. An outer arc-shaped bearing 46 is fixedly installed on the front and rear sides of the upper and lower ends of each second electrode plate 45. The outer side wall of each outer arc-shaped bearing 46 is movably abutting against the inner wall of the electrolytic annular outer cavity 22. The top center of each second electrode plate 45 is fixedly connected to the output end of the central drive member. When the central drive member works, it drives the first electrode plate 41 and each second electrode plate 45 to swing back and forth synchronously around the central axis of the electrolytic central inner cavity 21.

[0081] Both the first electrode plate 41 and the second electrode plate 45 are made of graphite material that can serve as both an anode plate and a cathode plate. When the first electrode plate 41 and the second electrode plate 45 are energized, the electrode controller 23 controls one of them to serve as an anode plate and the other as a cathode plate.

[0082] To avoid excessive accumulation of metal precipitates on the cathode plate during the electrolytic metal precipitation process, a central drive unit is used to drive the first electrode plate 41 and the second electrode plate 45 to follow and achieve fixed-axis oscillation. This promotes the rapid shedding of metal precipitates under the impact of wastewater, which acts as the electrolyte, thus extending the service life of the anode and cathode plates and improving the performance.

[0083] When the first electrode plate 41 and the second electrode plate 45 swing about a fixed axis, the inner arc-shaped bearing 44 set on the first electrode plate 41 can play a role in constraint and guidance, and the outer arc-shaped bearing 46 set on the inner arc-shaped bearing 44 can also play a role in constraint and guidance.

[0084] In any of the above schemes, it is preferred that the two second electrode plates 45 and the first electrode plate 41 complete the low-speed mixing and stirring of the wastewater solution inside the electrolytic annular outer cavity 22 and the electrolytic central inner cavity 21 during the oscillation process.

[0085] In addition, by keeping the first electrode plate 41 and the second electrode plate 45, which are used alternately as the anode plate and the cathode plate, in motion, the phenomenon of bubbles in the electrolyte adhering to the electrode surface is effectively reduced; the timely removal of bubbles helps to maintain sufficient contact between the electrolyte and the electrode surface, thereby improving the efficiency of the electrolysis reaction.

[0086] In any of the above embodiments, it is preferred that the sediment discharge component includes a sediment collection pipe 47 installed inside the collection space 19, and an inner collection pipe 48 and an outer collection pipe 49 with control valves are respectively connected to the top of both ends of the sediment collection pipe 47 via a tee. The top of each inner collection pipe 48 is fixed to the bottom of the cylindrical electrolytic cell 17 and communicates with the interior of the electrolysis center cavity 21, and the top of each outer collection pipe 49 is fixed to the bottom of the cylindrical electrolytic cell 17 and communicates with the interior of the electrolysis annular outer cavity 22.

[0087] After the wastewater inside the electrolytic cell is electrolyzed, the heavy metal ions in the wastewater will continuously precipitate out and fall into the wastewater in the form of metal precipitates, eventually settling at the bottom of the corresponding electrolysis center inner cavity 21 or the bottom of the electrolysis annular outer cavity 22. By controlling the opening of the valves on the corresponding collection inner pipe 48 and collection outer pipe 49, the wastewater containing metal precipitates can be continuously precipitated out in conjunction with the precipitation collection pipe 47 and the pump body configured on it, thereby achieving the purpose of reducing the heavy metal content in the remaining wastewater and facilitating the subsequent continuous purification of the wastewater.

[0088] In any of the above embodiments, it is preferred that there are two second electrode plates, and the two second electrode plates are symmetrically arranged in the electrolytic annular outer cavity 22 on both sides of the first electrode plate. The tops of the two second electrode plates and the top of the first electrode plate are respectively connected to the corresponding output end of the central drive member. When the central drive member is working, it can simultaneously drive the first electrode plate and the two second electrode plates to periodically reciprocate around the central axis of the electrolytic central inner cavity 21.

[0089] In any of the above embodiments, it is preferred that the first electrode plate and the second electrode plate are used alternately as the anode plate and the cathode plate.

[0090] By using a sandwich structure of two anode plates and one cathode plate, or two cathode plates and one anode plate, the effective area in the electrolysis process can be increased, thereby improving the current density and electrolysis efficiency; making the electrolysis reaction more uniform, reducing local overheating or overcooling, and facilitating a stable electrolysis process.

[0091] At the same time, it helps to improve the mass transfer process in the electrolyte; ions in the wastewater are more likely to migrate to the electrode surface under the action of the electric field, which accelerates the electrochemical reaction and improves the overall electrolysis efficiency.

[0092] In any of the above embodiments, it is preferred that, under the action of the central driving member, the dual-stage electrolysis mechanism can reciprocate around the central axis of the cylindrical electrolysis cell 17. In the working state, the dual-stage electrolysis mechanism is used to precipitate heavy metal impurities in the wastewater in the cylindrical electrolysis cell 17 and form metal precipitates that accumulate at the bottom of the cylindrical electrolysis cell 17.

[0093] In any of the above embodiments, it is preferred that the central drive component includes a dual-axis servo motor 50 fixedly installed at the top center of the positioning cover 40. The lower output shaft of the dual-axis servo motor 50 movably passes through the central hole of the positioning cover 40 and extends into the inner cavity 21 of the electrolysis center, and is fixedly connected to the top center of the central upper plate seat 42 through the central fixing plate 20. A top connecting plate 51 is fixedly installed on the top of the upper output shaft of the dual-axis servo motor 50. Output connecting vertical shafts 52 are fixedly installed at the bottom of both ends of the top connecting plate 51, and the bottom of each output connecting vertical shaft 52 is fixedly connected to the top center of the corresponding second pole plate 45 below it. Arc-shaped constraint grooves 53 are respectively provided on the top of both sides of the top connecting plate 51 for the lower ends of the wastewater feeding component and the clear liquid suction component to pass through.

[0094] When the top connecting plate 51 is working, it reciprocates at a fixed angle under the drive of the dual-axis servo motor 50, and does not interfere with the movement of the wastewater feeding component or the clear liquid suction component during the swing.

[0095] An electrode controller 23 is fixedly installed at the top center of the top connecting plate 51. The electrode controller 23 is connected to the two second electrode plates 45 and the first electrode plate 41 and controls the second electrode plate 45 and the first electrode plate 41 to be used alternately as the anode plate and the cathode plate.

[0096] In summary, this non-ferrous metal mine wastewater treatment equipment can efficiently perform sedimentation, filtration, and electrolytic extraction of heavy metals from wastewater with high heavy metal content, effectively ensuring treatment efficiency. It effectively combines physical sedimentation, electrolysis, and biological dosing to achieve the main purification tasks of wastewater treatment. The bottom-inlet and top-outlet water filtration method effectively ensures filtration efficiency and controls impurities in the wastewater to be located at the bottom for subsequent centralized accumulation and discharge. The deep electrolysis unit uses a stirring-while-electrolyzing method to effectively improve the flowability of wastewater during electrolysis, thereby enhancing the electrolysis effect and the precipitation of heavy metal precipitates. This equipment is particularly suitable for non-ferrous metal mines with high heavy metal content. Wastewater from metal mines is treated by electrolysis to achieve rapid precipitation of heavy metals from the wastewater. The electrolysis process is controlled by using two second electrode plates 45 on either side to clamp the central first electrode plate 41, with the first and second electrode plates 41 and 45 alternately acting as anode and cathode plates. This allows for alternating precipitation of metal deposits within the inner cavity 21 and the outer annular cavity 22 of the electrolysis center. When the first and second electrode plates 41 and 45 in the deep electrolysis unit alternate as anode and cathode plates, they can reciprocate at a fixed axis and angle under the drive of the central drive component, effectively reducing the phenomenon of bubbles adhering to the electrode surface in the electrolyte. The timely removal of bubbles helps maintain sufficient contact between the electrolyte and the electrode surface, thereby improving the efficiency of the electrolysis reaction.

[0097] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. For those skilled in the art, any alternative improvements or transformations made to the implementation of the present invention fall within the protection scope of the present invention.

[0098] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. Wastewater treatment equipment for non-ferrous metal mines, characterized in that: The system includes a wastewater sedimentation unit, a deep electrolysis unit, and a chemical dosing and purification unit. A sedimentation inlet pipe equipped with a power pump and a sludge discharge pipe are respectively and spaced apart on the lower outer wall of the wastewater sedimentation unit. The sedimentation inlet pipe receives wastewater that has undergone preliminary filtration upstream. The sludge discharge pipe is used to periodically discharge the sludge accumulated at the bottom of the wastewater sedimentation unit. A first pipeline is installed at a primary supernatant pipe joint located in the middle of the wastewater sedimentation unit. The outlet end of the first pipeline is connected to the inlet end of the deep electrolysis unit, and a first delivery pump is installed on the first pipeline. A second pipeline is connected to the outlet end of the deep electrolysis unit, and a second delivery pump is installed on the second pipeline. The outlet end of the second pipeline is connected to the inlet end of the chemical dosing and purification unit. The outlet end of the chemical dosing and purification unit is used to connect to a downstream water treatment station. The deep electrolysis unit includes a cylindrical electrolytic cell. The bottom of the cylindrical electrolytic cell is fixedly installed on the top of a support frame. A collection space is provided between the support frame and the bottom of the cylindrical electrolytic cell. The collection space is used for operators to collect heavy metal precipitates. A sediment discharge component is installed inside the collection space. The top of the sediment discharge component is installed at the bottom of the cylindrical electrolytic cell and communicates with its interior. A two-stage electrolysis mechanism is installed in the center of the electrolysis chamber of the cylindrical electrolytic cell. The tops of the two-stage electrolysis mechanism are respectively connected to the power output end of a fixedly installed central drive component. A wastewater feed component is installed on the upper left side of the cylindrical electrolytic cell, and a clear liquid suction component is installed on the upper right side of the cylindrical electrolytic cell. The wastewater feed component is connected to the outlet end of the first pipeline, and the clear liquid suction component is connected to the inlet end of the second pipeline. The dual-stage electrolysis mechanism includes an annular diaphragm assembly fixedly installed at the bottom center of the electrolysis chamber of the cylindrical electrolytic cell. A central fixing disk is fixedly installed on the top of the annular diaphragm assembly, and a central drive component is fixedly installed at the center of the top of the central fixing disk. The annular diaphragm assembly divides the electrolysis chamber into an inner electrolysis chamber and an outer annular electrolysis chamber located at the center. A first electrode plate is installed inside the inner electrolysis chamber, and a second electrode plate is installed inside the outer annular electrolysis chamber. The first electrode plate and the second electrode plate are arranged opposite to each other and cooperate to perform electrolysis when energized. When in operation, the first electrode plate and the second electrode plate are controlled by a configured electrode controller to alternately use as an anode plate or a cathode plate. Under the action of the central driving component, the dual-stage electrolysis mechanism can reciprocate around the central axis of the cylindrical electrolysis cell. In the working state, the dual-stage electrolysis mechanism is used to precipitate heavy metal impurities in the wastewater in the cylindrical electrolysis cell and form metal precipitates that accumulate at the bottom of the cylindrical electrolysis cell.

2. The wastewater treatment equipment for non-ferrous metal mines according to claim 1, characterized in that: The wastewater sedimentation unit includes a sedimentation tank with an open top. A filtration unit is installed in the lower part of the inner cavity of the sedimentation tank. The filtration unit divides the sedimentation tank into an upper water collection chamber and a lower sludge collection chamber. The sedimentation inlet pipe and the sludge discharge pipe are both installed on the lower outer wall of the sedimentation tank and are connected to the interior of the sludge collection chamber. The primary supernatant pipe connector is located in the upper part of the filtration unit and its interior is connected to the interior of the water collection chamber.

3. The wastewater treatment equipment for non-ferrous metal mines according to claim 2, characterized in that: The filtration unit includes a built-in frame horizontally installed inside the water collection chamber. The outer side wall of the built-in frame is movably abutted against the inner side wall of the water collection chamber. Filter media is placed in the filter chamber inside the built-in frame. A primary filter screen and a secondary filter screen are fixedly installed at the openings at the bottom and top of the built-in frame, respectively.

4. The wastewater treatment equipment for non-ferrous metal mines according to claim 3, characterized in that: There are two second electrode plates, which are symmetrically arranged in the electrolytic annular outer cavity on both sides of the first electrode plate. The tops of the two second electrode plates and the top of the first electrode plate are respectively connected to the corresponding output end of the central drive. When the central drive works, it can simultaneously drive the first electrode plate and the two second electrode plates to periodically reciprocate around the central axis of the electrolytic central cavity. The first electrode and the second electrode are used alternately as the anode plate and the cathode plate.

5. The wastewater treatment equipment for non-ferrous metal mines according to claim 4, characterized in that: The wastewater feeding component includes a first riser connected to the outlet end of the first pipeline, a first multi-port pipe installed at the bottom of the first riser, and a central inlet pipe and an outer cavity inlet pipe respectively installed at the bottom of the two branch pipes with valves of the first multi-port pipe for communicating with the inner cavity of the electrolysis center and the inner cavity of the electrolysis annular outer cavity.

6. The wastewater treatment equipment for non-ferrous metal mines according to claim 5, characterized in that: The clear liquid suction component includes a second riser connected to the inlet end of the second pipeline. A second multi-port pipe is installed at the bottom of the second riser. The bottom of the two branch pipes with valves of the second multi-port pipe are respectively equipped with a central suction pipe and an outer suction pipe for communicating with the inner cavity of the electrolysis center and the outer cavity of the electrolysis annular cavity. Corrugated telescopic pipe sections are respectively provided at the lower part of the central suction pipe and the lower part of the outer suction pipe. A connecting plate is fixed at the bottom of each corrugated telescopic pipe section. A control telescopic rod is fixedly installed on one side of each connecting plate. The top of each control telescopic rod is fixed to the bottom of the central fixed plate, and the bottom of each control telescopic rod is fixed to the top side of the connecting plate. The control telescopic rod drives the corrugated telescopic pipe section to extend and retract in the vertical direction through its own extension and retraction.

7. The wastewater treatment equipment for non-ferrous metal mines according to claim 6, characterized in that: The dosing and purification unit includes a dosing tank, the inlet of which is connected to the outlet of the second pipeline, and the outlet of which is connected to the downstream water treatment station via a pipeline. A dosing chamber is installed on the top of the dosing tank and communicates with its interior.

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