Integrated multi-stage filtering device for tailing wastewater

Abstract

The present application relates to wastewater treatment device field, specifically is a tailing wastewater integrated multistage filtration treatment device, including track frame, be provided with hydraulic assembly on track frame, track frame is provided with a plurality of board frame along its length direction sliding, the filter cloth of replaceable filter position is connected through rolling mechanism on board frame, the cleaning mechanism for washing both sides of filter cloth is provided on the lower side of board frame, the filter cloth is wound by two roll rollers in the application, and the filter cloth passes through the lower part of the board frame, and then in the filtration, the wastewater flows through the filter cloth to complete the solid-liquid separation in the board frame, in the process of cleaning filter cake, the filter cloth is moved to change the filter position by driving the roll roller to rotate, the filter position of the filter cloth is replaced after each filtration, the filter position of the filter cloth is replaced, the filter is always carried out in the new filter cloth area, and the filter cake on the filter cloth is automatically dropped due to the change of path in the process of moving the filter cloth, thereby effectively protecting the quality and filtering effect of the filter cloth.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment devices, specifically an integrated multi-stage filtration treatment device for tailings wastewater. Background Technology

[0002] A large amount of tailings wastewater is generated during the mining process. This type of wastewater must be effectively treated to meet the standards before it can be discharged. Solid-liquid separation is the core link in the tailings wastewater treatment process. Among them, the filter press has become one of the most widely used equipment in the field of solid-liquid separation of tailings wastewater due to its advantages such as high dewatering efficiency and low filter cake moisture content.

[0003] Plate and frame filter presses, as the mainstream type of filter press, mainly consist of a frame, multiple parallel filter plates, a pressing mechanism, a feeding mechanism, and a discharging mechanism. Their working principle is as follows: the pressing mechanism presses multiple filter plates together, forming sealed filter chambers between adjacent plates. Filter cloth is placed on both sides of each filter plate. A high-pressure feed pump delivers tailings wastewater into each filter chamber. Under the action of pressure difference, the filtrate passes through the filter cloth into the filtrate channel inside the filter plate and is collected and discharged. Solid particles are trapped on the surface of the filter cloth and gradually accumulate to form a filter cake. When the filter cake reaches the set thickness or the filtration pressure reaches the upper limit, feeding stops, and the moisture content of the filter cake can be further reduced through diaphragm pressing. Then, the filter plates are loosened, and the filter cake is discharged using its own gravity combined with vibration, knocking, or scraper devices. After discharge, the filter cloth is cleaned, preparing for the next working cycle.

[0004] However, when treating tailings wastewater with high fine particle content and high viscosity, the aforementioned fixed filter cloth filter press has gradually revealed the following insurmountable technical defects: First, fine tailings particles and viscous colloids are very easy to embed inside the filter cloth fibers, resulting in excessive adhesion between the filter cake and the filter cloth. Existing unloading methods such as vibration and knocking can only remove large pieces of filter cake on the surface, leaving 10%-20% of fine particles in the gaps between the filter cloth fibers. This requires manual cleaning at regular intervals, which is labor-intensive and seriously affects production efficiency. At the same time, frequent rapping can also cause filter plate deformation and filter cloth tearing, significantly shortening the service life of the equipment.

[0005] Secondly, in traditional filter presses, the filter cloth is fixedly installed on the filter plate. The same position of the filter cloth is continuously used in the filtration process, which causes fine particles to gradually accumulate on the filter cloth, clogging the pores of the filter cloth fibers. This results in a sharp increase in filtration resistance, a significant decrease in filtration efficiency, a reduction in the service life of the filter cloth, and a serious waste of filter cloth resources. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an integrated multi-stage filtration treatment device for tailings wastewater, including a track frame, a hydraulic assembly on the track frame, several plates slidingly arranged on the track frame along its length, filter cloths with replaceable filtration positions connected to the plates via a rolling mechanism, and a cleaning mechanism for rinsing both sides of the filter cloths on the underside of the plates.

[0007] The rolling mechanism includes two support arms that are fixedly installed on the upper side of the plate frame and arranged symmetrically in front and behind. Two rolling rollers arranged vertically are rotatably arranged between the two support arms. The two ends of the filter cloth are wound between the two rolling rollers and the filter cloth passes around the lower part of the plate frame.

[0008] During filtration, the plates are pressed together, and the wastewater flows through the filter cloth into the inside of the plates. When cleaning the filter cake, the roller is rotated to move the filter cloth and change the filtration position.

[0009] The cleaning mechanism includes two rinsing rollers located at the bottom of the plate frame. Water-permeable holes are provided on the outer side of the rinsing rollers, and the rinsing rollers are connected to a water pump. The front and back sides of the filter cloth are respectively attached to the cylindrical surfaces of the two rinsing rollers.

[0010] Tailings wastewater is filtered by changing the filter cloth at the filtration position and rinsing both sides.

[0011] Preferably, the support arm located at the front is fixedly equipped with two excitation motors, and the output shafts of the excitation motors are fixedly connected to the corresponding rollers.

[0012] Preferably, the two excitation motors rotate in coordination, so that the two rollers convey the filter cloth to change the filtration position when cleaning the filter cake.

[0013] Preferably, when most of the filter cloth is wound on one of the rollers, the winding roller is replaced with an unwinding roller, and the filter cloth is then placed on the plate frame.

[0014] Preferably, two sets of rotating booms are rotatably arranged between the front and rear support arms, and each set of rotating booms consists of two symmetrically arranged front and rear.

[0015] Preferably, two clamping rollers are rotatably connected between the two rotating arms in the same group, and the clamping rollers are used to clamp the filter cloth.

[0016] Preferably, a water-blocking frame is provided at the lower part of the plate frame, the rinsing roller is rotatably connected to the water-blocking frame, and a guide roller is rotatably connected to the left side inside the water-blocking frame.

[0017] Preferably, two water-retaining tiles are fixedly connected to the water-retaining frame, each located inside a corresponding flushing roller, and the water-retaining tiles are connected to the water pump.

[0018] Preferably, when the filter cloth covers the lower half of the right flushing roller, the corresponding water-blocking tile blocks the water-permeable holes in the upper half of the right flushing roller; when the filter cloth covers the upper half of the left flushing roller, the corresponding water-blocking tile blocks the water-permeable holes in the lower half of the left flushing roller.

[0019] Preferably, a cloth pressing frame is slidably provided on both the left and right sides of the plate frame, and a spiral spring is provided between the cloth pressing frame and the plate frame. After the cloth pressing frame presses the filter cloth, it is flush with the plate frame.

[0020] The beneficial effects of this invention are as follows: First, this invention uses two rollers to wind the filter cloth, allowing the filter cloth to wrap around the lower part of the plate frame. During filtration, wastewater flows through the filter cloth into the plate frame to complete solid-liquid separation. When cleaning the filter cake, the rollers are driven to rotate to move the filter cloth and change the filtration position, so that the filter cloth is changed after each filtration, ensuring that filtration always takes place in a new filter cloth area. At the same time, during the movement of the filter cloth, the filter cake on the filter cloth automatically falls off due to the change in path, avoiding the use of mechanical methods such as vibration and knocking for unloading. This effectively protects the quality and filtration effect of the filter cloth and extends its service life.

[0021] Second, this invention uses two rinsing rollers to contact the filter cloth. The rinsing rollers not only guide the filter cloth to change direction at the bottom of the plate frame, but also spray high-pressure water outward through the water-permeable holes on the outside of the rinsing rollers via a water pump, thereby rinsing the moving filter cloth. The cylindrical surfaces of the two rinsing rollers are respectively attached to the front and back of the filter cloth, so that the rinsing rollers can simultaneously rinse the front and back of the filter cloth in two directions, which significantly improves the cleaning effect of the filter cloth and ensures the reuse capability of the filter cloth.

[0022] Third, the present invention uses clamping rollers set on the support arm to clamp the filter cloth. When most of the filter cloth is wound on one of the rollers, the winding roller is changed to unwinding. At the same time, the rotating arm drives the clamping roller to swing, so that the filter cloth is released to the other side of the plate frame, realizing the filter cloth changing side to adhere to the plate frame, thereby making full use of both sides of the filter cloth to participate in the filtration process, avoiding waste of filter cloth resources, and improving the utilization rate of filter cloth.

[0023] Fourth, this invention employs water-blocking tiles fixed to the water-blocking frame and located within the corresponding rinsing rollers to selectively block the water-permeable holes on the inner side of the rinsing rollers. This prevents water from spraying from the semi-circular water-permeable holes of the rinsing rollers that do not contact the filter cloth. Instead, the rinsing water is concentrated and sprayed out from the semi-circular water-permeable holes that are in contact with the filter cloth, thus fully spraying the cleaning water onto the surface of the filter cloth to be cleaned. This ensures both the full utilization of water resources and the sufficient water pressure for rinsing the filter cloth, thereby improving rinsing efficiency. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the track frame, hydraulic assembly, plate frame and filter cloth in this invention;

[0027] Figure 3 This is a schematic diagram of the structure of the plate frame, roller, excitation motor and pressing frame in this invention;

[0028] Figure 4 This is a partial cross-sectional view of the plate frame, support arm, clamping roller and winding roller in this invention;

[0029] Figure 5 This is a schematic diagram of the structure of the roller, rotating arm, filter cloth and excitation motor in this invention;

[0030] Figure 6 This is a partial structural diagram of the support arm, the winding roller, the excitation motor, and the clamping roller in this invention;

[0031] Figure 7 This is a schematic diagram of the structure of the pressure frame in this invention;

[0032] Figure 8 This is a schematic diagram of the structure of the water-blocking frame, flushing roller, guide roller and water-blocking tile in this invention;

[0033] Figure 9 This is a schematic diagram of the structure of the filter cloth, rinsing roller and guide roller in this invention;

[0034] Figure 10 This is a partial cross-sectional view of the flushing roller and the water-retaining tile in this invention.

[0035] In the diagram: 1. Track frame; 2. Hydraulic assembly; 3. Plate frame; 4. Rolling mechanism; 5. Cleaning mechanism; 6. Filter cloth; 31. Pressing frame; 41. Support arm; 42. Rolling roller; 51. Washing roller; 52. Water baffle frame; 411. Rotating arm; 412. Clamping roller; 421. Excitation motor; 511. Water baffle; 521. Guide roller. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0037] See Figure 1 , Figure 2 and Figure 3An integrated multi-stage filtration treatment device for tailings wastewater includes a track frame 1, a hydraulic assembly 2 on the track frame 1, several plate frames 3 slidably arranged along the length of the track frame 1, filter cloths 6 with replaceable filtration positions connected to the plate frames 3 through a rolling mechanism 4, and a cleaning mechanism 5 for rinsing both sides of the filter cloths 6 on the lower side of the plate frames 3.

[0038] During filtration, the hydraulic assembly 2 pushes the leftmost plate frame 3 to the right, causing the plate frames 3 to press against each other. This causes the filter cloths 6 on the two adjacent plate frames 3 to move closer together, and the gap between the two filter cloths 6 forms a sealed filter chamber. Then, the high-pressure feed pump sends the tailings wastewater into each filter chamber. Under the action of pressure difference, the filtrate passes through the filter cloth 6 and enters the filtrate flow channel inside the plate frame 3, and finally collects and is discharged. Solid particles are trapped on the surface of the filter cloth 6 and gradually accumulate to form a filter cake. When the filter cake reaches the set thickness or the filtration pressure reaches the upper limit, the feeding stops, and the moisture content of the filter cake can be further reduced by the diaphragm pressing on the plate frame 3.

[0039] Then, the hydraulic assembly 2 is reset, and the automatic frame shifting mechanism on the track frame 1 pulls the plate frame 3 to the left one by one. At the same time, the filter cake moves the filter cloth 6 by its own gravity in conjunction with the rolling mechanism 4, so that the filter cake falls efficiently and the filter cloth 6 is replaced with a new filter position corresponding to the plate frame 3. While the filter cloth 6 is being conveyed, the cleaning mechanism 5 washes both sides of the filter cloth 6 in two directions, which significantly improves the cleaning effect of the filter cloth 6 and ensures the reusability of the filter cloth 6.

[0040] It should be noted that the above-mentioned automatic frame shifting mechanism, hydraulic assembly 2, plate frame 3, and high-pressure feed pump are all common structures in traditional filter presses, and will not be described in detail in this article.

[0041] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 The rolling mechanism 4 includes two support arms 41 fixedly mounted on the upper side of the plate frame 3 and arranged symmetrically in front and behind. Two rollers 42 arranged vertically are rotatably arranged between the two support arms 41. The two ends of the filter cloth 6 are wound between the two rollers 42, and the filter cloth 6 passes around the lower part of the plate frame 3.

[0042] In the early stage of use of the filter cloth 6, the reverse side of the filter cloth 6 is attached to the plate frame 3. During filtration, the plates frame 3 are pressed together, and the wastewater enters from the front side of the filter cloth 6 and exits from the reverse side of the filter cloth 6. Then it flows into the interior of the plate frame 3, trapping solid particulate impurities on the front side of the filter cloth 6.

[0043] In the early stages of using the filter cloth 6, the upper roller 42 is for winding and the lower roller 42 is for unwinding. Thus, when cleaning the filter cake, rotating the two rollers 42 causes the upper roller 42 to wind up the filter cloth 6 and the lower roller 42 to unwind the filter cloth 6, thereby moving the filter cloth 6 and changing the position of the filter cloth 6 corresponding to the plate frame 3, thus changing the filtration position of the filter cloth 6.

[0044] Furthermore, during the movement of the filter cloth 6, the filter cake on the filter cloth 6 automatically falls off due to the change in path, avoiding the use of mechanical methods such as vibration and knocking for unloading, thereby effectively protecting the quality and filtration effect of the filter cloth 6 and extending the service life of the filter cloth 6.

[0045] See Figure 3 , Figure 4 , Figure 8 and Figure 9 The cleaning mechanism 5 includes two rinsing rollers 51 located at the bottom of the plate frame 3. The rinsing rollers 51 have water-permeable holes on their outer sides and are connected to a water pump. The front and back sides of the filter cloth 6 are respectively attached to the cylindrical surfaces of the two rinsing rollers 51.

[0046] During the process of changing the filtration position of the moving filter cloth 6, the rinsing roller 51 plays a guiding role in changing the direction of the filter cloth 6 at the bottom of the plate frame 3, so that in this embodiment, the filter cloth 6 located on the right side of the plate frame 3 moves downward and the filter cloth 6 located on the left side of the plate frame 3 moves upward.

[0047] In this embodiment, two rinsing rollers 51 are arranged horizontally on the lower part of the plate frame 3 and vertically. Therefore, the filter cloth 6 moves downward and passes around the lower half of the right rinsing roller 51. Then the filter cloth 6 moves upward and passes around the upper half of the left rinsing roller 51, so that the right rinsing roller 51 is in contact with the reverse side of the filter cloth 6 and the left rinsing roller 51 is in contact with the front side of the filter cloth 6.

[0048] During the movement of the filter cloth 6, high-pressure water is sprayed outward through the water-permeable holes on the outside of the rinsing roller 51 by a water pump, thereby rinsing the moving filter cloth 6. The cylindrical surfaces of the two rinsing rollers 51 are respectively attached to the front and back of the filter cloth 6, so that the rinsing rollers 51 can simultaneously rinse the front and back of the filter cloth 6 in two directions, which significantly improves the cleaning effect of the filter cloth 6 and ensures the reusability of the filter cloth 6.

[0049] In order to maintain the tension of the filter cloth 6 within a specified range while moving the filter cloth 6, the present invention provides the following structure: (See attached diagram) Figure 4 , Figure 5 and Figure 6 Two excitation motors 421 are fixedly installed on the support arm 41 at the front. The output shaft of the excitation motor 421 is fixedly connected to the corresponding roller 42. The excitation motors 421 rotate in coordination, so that the two rollers 42 convey the filter cloth 6 to change the filtration position when cleaning the filter cake.

[0050] In this embodiment, the excitation motor 421 is an electric motor with an integrated torque monitoring function, so that when the roller 42 rotates and moves the filter cloth 6, the tension of the filter cloth 6 is maintained within a specified range.

[0051] To fully utilize both sides of the filter cloth 6 and enable the filtrate to pass through the filter cloth 6 from the front to the back and from the back to the front, the present invention provides the following structure: (See attached diagram) Figure 3 , Figure 4 , Figure 5 and Figure 6 Two sets of rotating arms 411 are rotatably arranged between the front and rear support arms 41. Each set of rotating arms 411 consists of two symmetrically arranged front and rear arms. Two clamping rollers 412 are rotatably connected between the two rotating arms 411 in the same set. The clamping rollers 412 are used to clamp the filter cloth 6.

[0052] When most of the filter cloth 6 is wound on one of the rollers 42, that is, when all the filter cloth 6 on the unwinding roller 42 is released in this embodiment, the two sets of rotating arms 411 are manually rotated. The rotating arms 411 drive the clamping roller 412 to swing, so that the filter cloth 6 on the winding roller 42 moves to the right side of the plate frame 3 and is released. Then the filter cloth 6 is wound around the lower part of the plate frame 3 and wound on another roller 42.

[0053] This allows the filter cloth 6 to be re-wound and unwound, thus enabling the filter cloth 6 to be re-attached to the plate frame 3. When filtering again, the filtrate enters from the reverse side of the filter cloth 6 and exits from the front side into the plate frame 3, thereby making full use of both sides of the filter cloth 6 in the filtration process, avoiding waste of filter cloth 6 resources, and improving the utilization rate of filter cloth 6.

[0054] In this embodiment, a screw is threaded onto the front rotating arm 411, and an arc-shaped groove is provided on the front support arm 41. The screw passes through the arc-shaped groove. After rotating the rotating arm 411, the rotating arm 411 is locked onto the support arm 41 by rotating the screw, thereby realizing the replacement of the filter cloth 6.

[0055] To prevent cleaning water from splashing everywhere and to change the orientation of the lower filter cloth 6, the present invention has the following structure: (See attached diagram) Figure 3 , Figure 8 and Figure 9 A water-blocking frame 52 is provided at the lower part of the plate frame 3. The flushing roller 51 is rotatably connected to the water-blocking frame 52. A guide roller 521 is rotatably connected to the left side inside the water-blocking frame 52.

[0056] In this embodiment, when filtering the filtrate through the front side of the filter cloth 6, the filter cloth 6 passes around the lower part of the right flushing roller 51, the upper part of the left flushing roller 51, and the lower part of the guide roller 521 in sequence, and finally the filter cloth 6 is wound upward along the left side of the water-blocking frame 52 onto the roller 42; when filtering the filtrate through the back side of the filter cloth 6, the filter cloth 6 is wound in the same way, so that the front side of the filter cloth 6 is attached to the lower part of the right flushing roller 51, and the back side of the filter cloth 6 is attached to the upper part of the left flushing roller 51.

[0057] To facilitate efficient rinsing of both sides of the filter cloth 6, the present invention features the following structure: (See attached diagram) Figure 8 , Figure 9 and Figure 10 Two water-blocking tiles 511 are fixedly connected to the water-blocking frame 52, each located inside the corresponding flushing roller 51. The water-blocking tiles 511 are connected to the water pump. The filter cloth 6 covers the lower half of the right flushing roller 51, and the corresponding water-blocking tile 511 blocks the water-permeable holes in the upper half of the right flushing roller 51. The filter cloth 6 covers the upper half of the left flushing roller 51, and the corresponding water-blocking tile 511 blocks the water-permeable holes in the lower half of the left flushing roller 51.

[0058] The water-retaining tiles 511 inside the corresponding rinsing roller 51 selectively block the water-permeable holes on the inner side of the rinsing roller 51, so that the water-permeable holes of the rinsing roller 51 that do not contact the filter cloth 6 are blocked by the water-retaining tiles 511 and do not spray water. That is, the water-retaining tiles 511 inside the right rinsing roller 51 block the water-permeable holes on its upper part; the water-retaining tiles 511 inside the left rinsing roller 51 block the water-permeable holes on its lower part, so that the rinsing water is concentrated and sprayed out from the water-permeable holes that are in contact with the filter cloth 6, so that the cleaning water is fully sprayed onto the surface of the filter cloth 6 to be cleaned, which not only ensures the full utilization of water resources, but also ensures the spray water pressure for rinsing the filter cloth 6, thereby improving the rinsing efficiency.

[0059] See Figure 3 , Figure 4 and Figure 7 The filter cloth 6 is pressed by a pressure frame 31 on both the left and right sides of the plate frame 3. A spiral spring is installed between the pressure frame 31 and the plate frame 3. After the pressure frame 31 presses the filter cloth 6, it is flush with the plate frame 3.

[0060] When the plate frame 3 separates from the plate frame 3, the helical spring pushes the pressure frame 31 away from the plate frame 3 by its own elastic force, so that the pressure frame 31 moves away from the filter cloth 6, and the filter cloth 6 can move smoothly. During filtration, the plate frame 3 and the plate frame 3 are pressed together, so that the two adjacent plate frames 3 drive the pressure frame 31 on them to move synchronously, so that the pressure frame 31 and the pressure frame 31 are pressed together, and the pressure frame 31 presses against the filter cloth 6, limiting the filter cloth 6.

[0061] In this embodiment, a slot is provided on the vertical section of the pressing frame 31, so that when the pressing frame 31 is pressed onto the filter cloth 6, the wastewater passes through the slot on the pressing frame 31 and comes into contact with the filter cloth 6 to achieve filtration.

[0062] It should be noted that a sealing strip is fixedly installed on the side of the pressure frame 31 near the plate frame 3, so that the pressure frame 31 fits against the filter cloth 6, which can seal the upper and lower positions of the plate frame 3 and prevent water leakage from the plate frame 3 during filtration.

[0063] Although this invention adds structures such as a rolling mechanism 4, a cleaning mechanism 5, a rotating arm 411, and a pressing frame 31 to the traditional filter press, slightly increasing the initial investment cost, it enables the filter cloth 6 to automatically change its filtration position and efficiently remove the filter cake, avoiding mechanical unloading damage to the filter cloth 6. At the same time, it can simultaneously and efficiently wash both sides of the moving filter cloth 6, and can flip the filter cloth 6 to achieve double-sided filtration, thereby significantly extending the service life of the filter cloth 6, significantly reducing the overall operating cost, and thus enabling rapid profit generation, making it highly practical.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage filtration treatment device for tailings wastewater, comprising a track frame, a hydraulic assembly mounted on the track frame, and a plurality of plate frames slidably mounted on the track frame along its length, characterized in that, The plate frame is connected to a filter cloth with a replaceable filtration position via a rolling mechanism, and a cleaning mechanism for rinsing both sides of the filter cloth is provided on the lower side of the plate frame. The rolling mechanism includes two support arms that are fixedly installed on the upper side of the plate frame and arranged symmetrically in front and behind. Two rolling rollers arranged vertically are rotatably arranged between the two support arms. The two ends of the filter cloth are wound between the two rolling rollers and the filter cloth passes over the lower part of the plate frame. Two sets of rotating booms are rotatably arranged between the front and rear support arms, and each set of rotating booms consists of two symmetrically arranged front and rear arms. Two clamping rollers are rotatably connected between the two rotating arms in the same group. The clamping rollers are used to clamp the filter cloth. The plate frame is slidably provided with a cloth pressing frame on both the left and right sides. A spiral spring is provided between the cloth pressing frame and the plate frame. After the cloth pressing frame presses the filter cloth, it is flush with the plate frame. During filtration, the plates and frames are pressed together, and the wastewater flows through the filter cloth into the inside of the plates and frames. When cleaning the filter cake, the roller is rotated to move the filter cloth and change the filtration position. The cleaning mechanism includes two rinsing rollers located at the bottom of the plate frame. Water-permeable holes are provided on the outer side of the rinsing rollers, and the rinsing rollers are connected to a water pump. The front and back sides of the filter cloth are respectively attached to the cylindrical surfaces of the two rinsing rollers. The tailings wastewater is filtered by changing the filter cloth at the filtration position and rinsing both sides.

2. The integrated multi-stage filtration treatment device for tailings wastewater according to claim 1, characterized in that, The support arm located at the front is fixedly equipped with two excitation motors, and the output shafts of the excitation motors are fixedly connected to the corresponding rollers.

3. The integrated multi-stage filtration treatment device for tailings wastewater according to claim 2, characterized in that, The two excitation motors rotate in tandem, causing the two rollers to convey the filter cloth and change the filtration position while cleaning the filter cake.

4. The integrated multi-stage filtration treatment device for tailings wastewater according to claim 2, characterized in that, When most of the filter cloth is wound on one of the rollers, the winding roller is replaced with an unwinding roller, and the filter cloth is then placed on the plate frame.

5. The integrated multi-stage filtration treatment device for tailings wastewater according to claim 1, characterized in that, A water-blocking frame is provided at the lower part of the plate frame, and the flushing roller is rotatably connected to the water-blocking frame. A guide roller is rotatably connected to the left side inside the water-blocking frame.

6. The integrated multi-stage filtration treatment device for tailings wastewater according to claim 5, characterized in that, Two water-blocking tiles are fixedly connected to the water-blocking frame, each located inside a corresponding flushing roller, and the water-blocking tiles are connected to the water pump.

7. The integrated multi-stage filtration treatment device for tailings wastewater according to claim 6, characterized in that, When the filter cloth covers the lower half of the right flushing roller, the corresponding water-blocking tile blocks the water-permeable holes in the upper half of the right flushing roller; when the filter cloth covers the upper half of the left flushing roller, the corresponding water-blocking tile blocks the water-permeable holes in the lower half of the left flushing roller.

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