Multi-cavity internal circulation filtration treatment device for metal mine acid wastewater

Abstract

The invention discloses a metal mine acid wastewater multi-cavity internal circulation filtration treatment device, which comprises a cavity, a plurality of membrane assemblies and a driving mechanism, a water inlet and a water outlet are respectively arranged at two sides of the cavity, a waste liquid outlet is arranged at the bottom of the cavity and is used for backwashing filtered impurities, the membrane assemblies are arranged in the cavity, and the driving mechanism is arranged in the cavity. All the membrane assemblies are located in the cavity and divide the cavity into a plurality of cavities, and wastewater in a single cavity can only flow into other cavities through the membrane assemblies. The treatment device is divided into a plurality of inner cavities, wastewater subjected to primary filtration is used for backwashing the membrane module under the action of gravity so as to clean attached impurities, meanwhile, secondary filtration is performed by virtue of water inlet pressure, the treated wastewater is discharged from the water outlet, and the wastewater subjected to backwashing is circularly treated again from the water inlet, so that the treatment efficiency is improved, and the treatment cost is reduced. Along with the continuous rotation of the membrane components, each membrane component sequentially becomes a main membrane piece for filtering, and then is subjected to backwashing and secondary filtering.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines. Background Technology

[0002] Metal mines generate acidic wastewater during mining and beneficiation processes. This wastewater typically contains high concentrations of sulfates, heavy metals, and acidic substances. Membrane separation technology is a commonly used physical treatment method for treating acidic mine wastewater. When treating acidic mine wastewater, membrane separation technology can effectively remove suspended solids, heavy metal ions, sulfates, and other dissolved pollutants. The treated wastewater can then be used as industrial recycled water.

[0003] However, the application of membrane treatment technology in mine wastewater treatment still faces the following problems: First, because mine wastewater has a complex composition, it contains not only dissolved components but also a large number of insoluble components. During membrane separation, suspended solids and other substances in the wastewater are very easy to accumulate on the membrane surface. If they are not cleaned in time, the accumulated impurities will adhere to the membrane and seriously affect the filtration efficiency and filtration effect. Secondly, due to the complex dissolved components, the pH of mine wastewater often deviates from neutral. In the application of mine wastewater, it is usually acidic. Acidic wastewater has a strong corrosive effect on filtration equipment, especially on membrane modules due to its adhesion to or dissolution of impurities. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines. By rotating the membrane module inside the chamber, the liquid filtered by the chamber is used to backwash the membrane module, thereby solving the technical problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines includes: The cavity has an inlet and an outlet on its two sides, and a waste liquid outlet at its bottom for backwashing the filtered impurities. The membrane module has multiple membrane modules, all of which are located within the cavity and divide the cavity into several cavities. Wastewater in a single cavity can only flow into other cavities through the membrane module. The drive mechanism, located inside the cavity, is used to drive multiple membrane modules to rotate within the cavity; Wherein, the membrane module corresponding to the cavity where the water inlet is located is the main membrane module, and the wastewater is separated into secondary wastewater after being separated by the main membrane module. The secondary wastewater is backwashed as it flows through other cavities. The membrane module rotates around the central axis of the cavity under the action of the driving mechanism, so that any one of the membrane modules takes turns being located in the cavity where the inlet is located to become the main membrane module, and the secondary wastewater separated from the other membrane modules is backwashed.

[0006] Furthermore, the cavity is a horizontally placed cylindrical structure, and at least three membrane modules are provided. The multiple membrane modules are arranged together to form a membrane filtration device with a cross-sectional regular polygonal cylindrical structure. The membrane filtration device is coaxially arranged with the cavity, and the driving mechanism drives the membrane filtration device to rotate around the central axis. The membrane assembly includes a rectangular frame and a filter membrane disposed within the frame, with the ends of the rectangular frame contacting the inner sidewall of the cavity.

[0007] Furthermore, an outer cavity is formed on the inner sidewall of each membrane assembly and the cavity, and an intermediate cavity is formed by the portion enclosed by the membrane assembly; The inlet, waste liquid outlet, and outlet are sequentially connected to a single external cavity along the rotation direction of the membrane filtration device.

[0008] Furthermore, the membrane filtration device has a rotating shaft in its own axial direction, and the frame of the module assembly is fixed to the rotating shaft by a connecting rod; The driving mechanism is a rotary motor, which is located outside the cavity. The drive shaft of the rotary motor is connected to the rotating shaft via a coupling.

[0009] Furthermore, the frame of the membrane assembly is provided with rollers at the position where it contacts the inner sidewall of the cavity.

[0010] Furthermore, the cavity is provided with telescopic mechanisms at both ends. The movable end of the telescopic mechanism acts on the partition, so that the partition can move along the axial direction of the cavity and the end face of the partition can contact the edge of the frame of all the module components in the membrane filtration device.

[0011] Furthermore, the bottom of the cavity extends downward to form a rinsing chamber, and a rinsing mechanism is provided inside the rinsing chamber; The flushing mechanism is used to flush the filter membrane of the membrane module corresponding to the cavity where the waste liquid outlet is located; The waste liquid outlet is located at the bottom of the flushing chamber.

[0012] Furthermore, the rinsing mechanism includes a lead screw pair, a drive motor, and a nozzle; The lead screw assembly is arranged along the axial direction of the flushing chamber. The drive motor is used to drive the lead screw of the lead screw assembly to rotate. The drive motor is located outside the chamber. The nut of the lead screw assembly is provided with a slide, and the nozzle is arranged on the slide. The nozzle is connected to an external water supply module via a hose. The hose passes through the cavity, and the connection between the hose and the cavity is fixed and sealed. The length of the hose meets the requirement for the nozzle to move back and forth along the screw assembly. The nozzles are provided in multiple sets, and all the nozzles face the filter membrane of the membrane module corresponding to the cavity where the waste liquid outlet is located.

[0013] Compared with the prior art, the present invention has the following advantages: This invention divides the treatment device into multiple internal chambers and uses the wastewater after the initial filtration to backwash the membrane module under gravity to remove attached impurities. At the same time, secondary filtration is performed with the help of inlet water pressure. The treated wastewater is discharged from the outlet, and the backwash wastewater is recycled again from the inlet. As the membrane module rotates continuously, each membrane module will become the main membrane element for filtration in turn, then be backwashed, and then undergo secondary filtration. Three steps are performed in one rotation cycle, which not only ensures filtration efficiency and quality, but also reduces the clogging effect of impurities on the membrane filtration device. Attached Figure Description

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] Figure 1 This is a diagram of the internal structure of an acidic wastewater treatment device. Figure 2 This is the external front view of the acidic wastewater treatment device; Figure 3 This is a structural diagram of a membrane module; Figure 4 This is an internal structural diagram of an acidic wastewater treatment device equipped with a flushing mechanism; Figure 5 This is an external front view of an acidic wastewater treatment device equipped with a flushing mechanism.

[0016] The labels in the diagram represent the following: 1-Cavity, 11-Inlet, 12-Outlet, 13-Waste liquid outlet, 14-Outer cavity, 15-Intermediate cavity, 16-Flushing cavity; 2-Membrane module, 21-Main membrane module, 22-Frame, 23-Filter membrane, 24-Roller, 25-Reinforcing rib; 3-Drive mechanism, 31-Rotary motor, 32-Coupling; 4-Membrane filtration device, 41-Rotating shaft, 42-Connecting rod; 5-Partition plate, 51-Telescopic mechanism; 6-Flushing mechanism, 61-Screw pair, 62-Drive motor, 63-Spray nozzle, 64-Slide block, 65-Hose; 7-Staff. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 and Figure 2 As shown, the present invention provides a specific embodiment of a multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines, including a chamber 1, a membrane module 2, and a drive mechanism 3.

[0019] The cavity 1 is provided with an inlet 11 and an outlet 12. Wastewater flows into the cavity 1 through the inlet 11, is treated inside the cavity 1, and then flows out through the outlet 12.

[0020] Membrane module 2 is located inside cavity 1, and multiple membrane modules 2 are provided; multiple membrane modules 2 can divide cavity 1 into several cavities, each cavity is an independent individual, maintaining relative airtightness, and wastewater in a single cavity can only flow into the other cavities through membrane module 2; thus, wastewater can be separated by multiple membrane modules 2, improving the quality of wastewater treatment.

[0021] The membrane module 2 corresponding to the cavity where the inlet 11 is located is the main membrane module 21. After the wastewater is separated by the membrane module 2 located at the position of the main membrane module 21, it is separated into secondary wastewater. When the secondary wastewater flows through the remaining cavity, it will backwash the membrane module 2 between the two adjacent cavities to wash away the impurities remaining on the remaining membrane module 2.

[0022] In order to improve the utilization efficiency of the membrane components, in this embodiment, multiple membrane components 2 can rotate inside the cavity 1, so that all membrane components 2 take turns to become the membrane components 2 at the position of the main membrane component 21, and then the secondary wastewater backwashes the membrane components 2 located at the non-main membrane component 21 position.

[0023] Multiple membrane modules 2 rotate synchronously, ensuring that the membrane module 2 corresponding to the cavity where the outlet 12 is located is the membrane module 2 after backwashing, so as to prevent the acidic substances and metal ions remaining on the membrane module 2 from mixing with the secondary wastewater after backwashing and being discharged through the outlet 12.

[0024] The drive mechanism 3 is located inside the cavity 1 and is used to drive multiple membrane modules 2 to rotate synchronously within the cavity 1.

[0025] The side wall of the cavity 1 is provided with a waste liquid outlet 13, which is used to discharge the acidic substances and metal ions washed off by the secondary wastewater from the cavity 1.

[0026] To ensure that the acidic substances and metal ions washed off by the secondary wastewater on membrane module 2 are located in separate cavities, thus avoiding secondary pollution of the secondary wastewater discharged through outlet 12, this embodiment provides the following examples, such as... Figure 1 and Figure 2 As shown: The cavity 1 is a horizontally placed cylindrical structure, which is mounted on the support 7; the membrane module 2 has at least three membrane filtration devices 4 forming a regular polygonal prism structure; in this embodiment, three membrane modules 2 are preferred, and the membrane filtration device 4 is a regular triangular prism structure.

[0027] The three membrane modules 2 and the inner sidewall of the cavity 1 form three cavities called outer cavities 14; the cavity formed between the three membrane modules 2 is called the intermediate cavity 15; the inlet 11, the waste liquid outlet 13 and the outlet 12 are connected to a single outer cavity 14 in sequence along the rotation direction of the membrane filtration device 4.

[0028] Wastewater first enters the outer cavity 14 where the inlet 11 is located. After being separated by the membrane module 2, the secondary wastewater enters the intermediate cavity 15. After being diverted by the intermediate cavity 15, it enters the outer cavity 14 where the waste liquid outlet 13 and the outlet 12 are located respectively. During the process of entering the outer cavity 14 corresponding to the waste liquid outlet 13, the membrane module 2 corresponding to the waste liquid outlet 13 is backwashed to wash away the acidic substances and metal ions remaining on the membrane module 2. At the same time, the membrane module 2 corresponding to the outlet 12 performs membrane separation on the secondary wastewater again. The secondary wastewater after the second separation is discharged through the outlet 12.

[0029] The waste liquid outlet 13 is located directly below the cavity 1, which facilitates the discharge of acidic substances and metal ions washed off the membrane module 2 into the cavity 1.

[0030] In this embodiment, the membrane filtration device 4 is coaxially arranged with the cavity 1, and the edge of the membrane module is in contact with the inner side wall of the cavity 1. The driving mechanism 3 drives the membrane filtration device 4 to rotate along its own axis. The individual membrane module 2 is first located in the outer cavity 14 where the inlet 11 is located, and performs membrane separation on the acidic wastewater to form secondary wastewater. Then it rotates to the outer cavity 14 where the waste liquid outlet 13 is located, and the secondary wastewater backwashes the membrane module 2. Then it rotates to the outer cavity 14 where the outlet 12 is located, and performs secondary membrane separation on the secondary wastewater. This realizes the recycling of the membrane module 2 inside the cavity 1, so as to reduce the impact of acidic substances and metal ions on the membrane module 2 and extend the service life of the membrane module 2.

[0031] like Figure 1 and Figure 4 As shown, the membrane filtration device 4 rotates counterclockwise, meaning it first functions as the main membrane assembly for filtration, then undergoes backwashing, and finally functions as a secondary filtration membrane assembly, thus completing one cycle.

[0032] This embodiment also provides an embodiment of the membrane filtration device 4, such as... Figure 1 and Figure 3 As shown: The membrane filtration device 4 has a rotating shaft 41 in its own axial direction. The membrane assembly 2 includes a rectangular frame 22 and a filter membrane 23 disposed in the frame 22. The frame 22 is provided with reinforcing ribs 25, which are fixed to the rotating shaft 41 by connecting rods 42. The drive mechanism 3 is a rotary motor 31, which is located outside the cavity 1. The drive shaft of the rotary motor 31 is connected to the rotating shaft 41 by coupling 32.

[0033] In this embodiment, during rotation, it is necessary to ensure the sealing between the rotating shaft 41 and the cavity 1.

[0034] The frames 22 of adjacent membrane modules 2 are fixedly connected. The frame 22 of the membrane module 2 is provided with a roller 24 at the position where it contacts the inner side wall of the cavity 1. The roller is made of rubber. This ensures the sealing between the frame 22 and the side wall of the cavity 1, and also facilitates the rotation of the entire membrane filtration device 4 inside the cavity 1.

[0035] Furthermore, in this embodiment, as Figure 2 As shown, the length of the cavity 1 in the axial direction is greater than the length of the membrane filter device 4 in the axial direction. Inside the cavity 1, there are partitions 5 at both ends of the axis. The partitions 5 are perpendicular to the axis of the cavity 1. The edges of the partitions 5 are in contact with the inner wall of the cavity 1. The edges of the partitions 5 are covered with rubber material. Outside the cavity 1, there are telescopic mechanisms 51 at both ends. The movable end of the telescopic mechanism 51 acts on the partitions 5, so that the partitions 5 can rotate along the axis of the cavity 1 and the end face of the partitions 5 can contact the edges of the frame 22 of all the module components in the membrane filter device 4.

[0036] The telescopic mechanism 51 includes multiple hydraulic telescopic rods, which are arranged parallel to the axis of the cavity 1. The fixed end of the hydraulic telescopic rod is fixedly connected to and sealed to the cavity 1, while its movable end is located inside the cavity 1. The multiple hydraulic telescopic rods extend and retract synchronously.

[0037] When the membrane filter device 4 needs to rotate, the hydraulic telescopic rod is activated, and the two partitions 5 move in opposite directions, so that the partitions 5 are disengaged from the frame 22 of the membrane module 2, which facilitates the rotation of the membrane filter device 4. After the membrane filter device 4 has rotated, the hydraulic telescopic rod is activated again, and the two partitions 5 move towards each other, so that the partitions 5 contact the frame 22 of the membrane module 2, and the partitions 5 will apply a squeezing force to the frame 22 to ensure the sealing between each cavity.

[0038] After the secondary wastewater is diverted through the intermediate cavity 15, it enters the outer cavity 14 where the waste liquid outlet 13 and the water outlet 12 are located. During this process, the corresponding membrane module 2 will perform secondary membrane separation on the secondary wastewater, which will result in a higher content of acidic substances and metal ions in the secondary wastewater located in the intermediate cavity 15, and some acidic substances and metal ions will remain on the inner side of the filter membrane 23.

[0039] During the rotation of the membrane filtration device 4, when the membrane module 2 rotates to the position of the main membrane module 21, while the module performs membrane separation of wastewater, the wastewater also backwashes the inside of the filter membrane 23 to remove the acidic substances and metal ions remaining on the inside of the filter membrane 23.

[0040] Therefore, when the membrane filter device 4 is rotated, the partitions 5 at both ends move in opposite directions, the intermediate cavity 15 opens, and the secondary wastewater with high acid content and metal ion content can be discharged from the intermediate cavity 15 to avoid acid and metal ions from adhering to the inner side of the filter membrane 23 in the membrane module 2 again with the flow of secondary wastewater.

[0041] In this embodiment, such as Figure 4 and Figure 5 As shown, the bottom of the cavity 1 extends downward to form a rinsing cavity 16, and a rinsing mechanism 6 is provided inside the rinsing cavity 16. The rinsing mechanism 6 is used to rinse the filter membrane 23 of the membrane module 2 corresponding to the cavity where the waste liquid outlet 13 is located, and the rinsing mechanism 6 will not hinder the rotation of the membrane filtration device 4. The waste liquid outlet 13 is located at the bottom of the rinsing cavity 16.

[0042] The rinsing mechanism 6 includes a lead screw pair 61, a drive motor 62, and a nozzle 63. The lead screw pair 61 is arranged along the axial direction of the rinsing chamber 16. The drive motor 62 is used to drive the lead screw of the lead screw pair 61 to rotate. The drive motor 62 is located outside the chamber 1. A slide 64 is provided on the nut of the lead screw pair, and the nozzle 63 is arranged on the slide 64.

[0043] The nozzle 63 is connected to an external water supply module via a hose 65. The hose 65 passes through the cavity 1, and the connection between the hose 65 and the cavity 1 is fixed and sealed. The length of the hose 65 meets the requirement that the nozzle 63 moves back and forth along the screw pair. The slide 64 has an inner cavity, and the nozzle 63 and the hose 65 are respectively connected to the inner cavity.

[0044] Multiple sets of nozzles 63 are provided, and all nozzles 63 are directed toward the filter membrane 23 of the membrane module 2 corresponding to the cavity where the waste liquid outlet 13 is located. The angle between the incident direction of the nozzle 63 and the filter membrane 23 is not 90°.

[0045] Furthermore, the multiple nozzles 63 are at multiple angles relative to the filter membrane 23 to expand the coverage area of ​​the liquid sprayed by the nozzles 63.

[0046] Based on the above-described apparatus, the present invention also provides a specific implementation method, including the following steps: Step 001: The acidic substances and metal ions in the acidic wastewater are separated by the membrane module 2 located at the position of the main membrane module 21 on the membrane filtration device 4 to form secondary wastewater. The secondary wastewater then flows through the remaining membrane modules 2 of the membrane filtration device 4 and is discharged through the outlet 12 after secondary membrane separation. Step 002, the rotating membrane filtration device 4, enables the secondary wastewater to backwash the filter membrane 23 of the membrane module 2 that has just separated acidic substances and metal ions from the acidic wastewater, so that the acidic substances and metal ions are removed from the membrane module 2. At the same time, the filter membrane 23 of the membrane module 2, which has just separated acidic substances and metal ions in the acidic wastewater, is rinsed by the nozzle 63 located in the rinsing chamber 16; the rinsing liquid sprayed by the nozzle 63 is a chemical agent used to pretreat the acidic substances and metal ions.

[0047] Step 003: Acidic substances and metal ions detached from membrane module 2 enter the secondary wastewater located in flushing chamber 16 and are discharged through waste liquid outlet 13 to recover acidic substances and metal ions.

[0048] The present invention provides a multi-cavity internal circulation filtration and treatment device for acidic wastewater from metal mines, which is equipped with multiple membrane modules, dividing the cavity into multiple independent cavities. The multiple membrane modules take turns separating acidic substances and metal ions in the pickling wastewater. The secondary wastewater after membrane separation can backwash the membrane modules, so that the separated acidic substances and metal ions are located in independent cavities and will not cause secondary pollution to the secondary wastewater discharged through the outlet.

[0049] Furthermore, a flushing device is installed inside the cavity to flush the filter membrane of the membrane module, which works in conjunction with the backwashing of secondary wastewater to reduce the impact of acidic substances and metal ions on the membrane module and extend the service life of the membrane module.

[0050] The present invention provides a method for treating acidic wastewater from non-ferrous metal mines, which uses a membrane module to separate acidic substances and metal ions in pickling wastewater, and then uses the secondary wastewater obtained after separation to backwash the acidic substances and metal ions remaining on the membrane module in an independent cavity.

[0051] Furthermore, within the independent cavity, appropriate chemical agents are selected to rinse the membrane module, further removing residual acidic substances and metal ions from the membrane module. This also allows for the pretreatment of acidic substances and metal ions, shortening the time required for subsequent treatment processes.

[0052] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines, characterized in that, include: The cavity (1) has an inlet (11) and an outlet (12) on its two sides respectively, and a waste liquid outlet (13) at its bottom for backwashing the filtered impurities; Membrane module (2), the membrane module (2) has multiple components, all of which are located in the cavity (1) and divide the cavity (1) into several cavities. Wastewater in a single cavity can only flow into other cavities through the membrane module (2); The drive mechanism (3) is located inside the cavity (1) and is used to drive multiple membrane modules (2) to rotate inside the cavity (1); Among them, the membrane module (2) corresponding to the cavity where the water inlet (11) is located is the main membrane module (21). After the wastewater is separated by the main membrane module (21), it is separated into secondary wastewater. The secondary wastewater backwashes the membrane module (2) during the process of flowing through other cavities. The membrane module (2) rotates around the central axis of the cavity (1) under the action of the drive mechanism (3) so that any one of the membrane modules (2) takes turns being located in the cavity where the inlet (11) is located to become the main membrane module (21), and the secondary wastewater separated from the other membrane modules (2) is backwashed.

2. The multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines according to claim 1, characterized in that, The cavity (1) is a horizontally placed cylindrical structure. There are at least three membrane modules (2). Multiple membrane modules (2) are arranged to form a membrane filter device (4) with a cross-section of a regular polygonal cylinder. The membrane filter device (4) is arranged coaxially with the cavity (1). The driving mechanism (3) drives the membrane filter device (4) to rotate around the central axis. The membrane assembly (2) includes a rectangular frame (22) and a filter membrane (23) disposed within the frame (22). The ends of the rectangular frame (22) are in contact with the inner side of the sidewall of the cavity (1).

3. The multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines according to claim 2, characterized in that, An outer cavity (14) is formed on the inner sidewall of each membrane assembly (2) and the cavity (1), and an intermediate cavity (15) is formed by the portion enclosed by the membrane assembly (2). The inlet (11), waste liquid outlet (13) and outlet (12) are connected sequentially to a single outer cavity (14) along the rotation direction of the membrane filtration device (4).

4. The multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines according to claim 3, characterized in that, The membrane filtration device (4) has a rotating shaft (41) in its own axial direction, and the frame (22) of the module assembly is fixed to the rotating shaft (41) by a connecting rod (42); The drive mechanism (3) is a rotary motor (31), which is located outside the cavity (1). The drive shaft of the rotary motor (31) is connected to the rotating shaft (41) through a coupling (32).

5. A multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines according to claim 1 or 4, characterized in that, The frame (22) of the membrane assembly (2) is provided with a roller (24) at a position that contacts the inner side of the side wall of the cavity (1).

6. The multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines according to claim 5, characterized in that, The cavity (1) is provided with telescopic mechanisms (51) at both ends. The movable end of the telescopic mechanism (51) acts on the partition (5), so that the partition (5) can move along the axial direction of the cavity (1) and the end face of the partition (5) can contact the edge of the frame (22) of all the module components in the membrane filter device (4).

7. A multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines according to claim 1 or 6, characterized in that, The bottom of the cavity (1) extends downward to form a flushing cavity (16), and a flushing mechanism (6) is provided inside the flushing cavity (16). The flushing mechanism (6) is used to flush the filter membrane (23) of the membrane module (2) corresponding to the cavity where the waste liquid outlet (13) is located. The waste liquid outlet (13) is located at the bottom of the flushing chamber (16).

8. The multi-chamber internal circulation filtration and treatment device for acidic wastewater from metal mines according to claim 7, characterized in that, The flushing mechanism (6) includes a lead screw pair (61), a drive motor (62), and a nozzle (63). The lead screw pair (61) is arranged along the axial direction of the flushing chamber (16), the drive motor (62) is used to drive the lead screw of the lead screw pair (61) to rotate, the drive motor (62) is located outside the chamber (1), the nut of the lead screw pair is provided with a slide (64), and the nozzle (63) is arranged on the slide (64). The nozzle (63) is connected to an external water supply module via a hose (65). The hose (65) passes through the cavity (1). The connection between the hose (65) and the cavity (1) is fixed and sealed. The length of the hose (65) meets the requirement that the nozzle (63) moves back and forth along the screw pair. The nozzle (63) is provided in multiple sets, and all the nozzles (63) are directed toward the filter membrane (23) of the membrane module (2) corresponding to the cavity where the waste liquid outlet (13) is located.

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