A multi-stage filtration treatment device for acidified wastewater

Abstract

This invention relates to a multi-stage filtration treatment device for acidified wastewater, comprising a housing, a cover plate mounted on the housing, and multiple filter cartridges disposed within the housing. The housing is equipped with a swing cleaning mechanism to prevent clogging of the filter cartridges. The swing cleaning mechanism includes a left-right swing assembly and a brush assembly driven by the left-right swing assembly to perform reciprocating swinging motion. This invention uses two counter-rotating actuating plates in the left-right swing assembly to alternately drive a triangular mating plate with actuating groove to swing. This triangular mating plate directly drives the brush assembly, which is equipped with bristles, to perform horizontal reciprocating motion, causing the bristles to continuously mechanically scrub the surface of the filter plate. This process is completely automatic and can promptly remove sticky impurities adhering to the filter plate, thereby avoiding the problems of filter pore clogging and increased filtration resistance caused by long-term accumulation of impurities, and ensuring stable filtration flux.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage filtration treatment device for acidified wastewater. Background Technology

[0002] Acidification wastewater is a typical wastewater generated in various industrial processes such as electroplating, chemical industry, pharmaceutical industry, and metal processing. It is characterized by strong acidity and complex composition, often containing various impurities such as suspended particles, heavy metal ions, grease, colloids, and unreacted organic matter. If this type of wastewater is discharged directly without proper treatment, it will cause serious pollution to water bodies, soil and ecological environment, and may also corrode drainage pipe networks. Currently, the treatment of acidified wastewater often employs a combination of physical, chemical, and biological methods. Among these, multi-stage filtration, as an important physical pretreatment or advanced treatment method, is widely used to remove suspended solids and some colloidal substances from wastewater. This reduces the load on subsequent treatment units (such as neutralization, sedimentation, adsorption, and membrane separation) and ensures the stable operation of the overall treatment system. A typical multi-stage filtration treatment device for acidified wastewater usually consists of multiple filtration units connected in series. Each unit contains filter media with different pore sizes (such as filter screens, filter cartridges, and filter media layers). Through a gradient filtration method from coarse to fine, impurities of different particle sizes are intercepted step by step. However, in practical applications, existing multi-stage filtration devices have the following significant drawbacks: impurities in acidified wastewater, especially mixtures of sticky particles, grease, and colloidal substances, are very likely to adhere to and deposit on the filter plate surface and deeply clog the filter pores. As the operating time increases, the filtration resistance increases sharply, the throughput decreases, and the treatment efficiency is significantly reduced. When the clogging is severe, it may be necessary to shut down the machine and disassemble the filter plates for cleaning. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-stage filtration treatment device for acidified wastewater.

[0004] The objective of this invention is achieved through the following technical solution: a multi-stage filtration treatment device for acidified wastewater, comprising a housing, a cover plate installed on the housing, and multiple filter core bodies disposed within the housing; The housing is equipped with a swing cleaning mechanism to prevent the filter element from becoming clogged. The swing cleaning mechanism includes a left-right swing component and a brush component driven by the left-right swing component to swing back and forth. The left and right swinging assembly includes a connecting rod rotatably connected to the housing, and the brushing assembly is mounted on the connecting rod; One end of the connecting rod is fixedly connected to a triangular mating plate, and the circumferential surface of the triangular mating plate is provided with multiple actuation grooves; The box body is symmetrically fixedly connected with connecting plates, and a lever plate a and a lever plate b are rotatably connected to the two connecting plates respectively; Both the actuating plate a and the actuating plate b are provided with retractable mating parts. These mating parts can alternately engage with the actuating groove on the triangular mating plate when the actuating plate a and the actuating plate b rotate, so as to drive the triangular mating plate and the connecting rod to reciprocate. A semi-circular limiting plate is also fixedly connected to the actuating plate a. The arc surface of the semi-circular limiting plate cooperates with the side of the triangular mating plate to limit the triangular mating plate when the actuating plate b drives the connecting rod to rotate.

[0005] The brushing assembly includes a mounting plate a fixedly connected to a connecting rod and a mounting plate b detachably connected to the connecting rod, with brush bristles provided on the opposite surfaces of the mounting plate a and the mounting plate b.

[0006] The swing cleaning mechanism also includes a transmission assembly for driving the toggle plate a and the toggle plate b to rotate. The transmission assembly includes a transmission shaft rotatably connected to the housing, two bevel gears a fixedly sleeved on the transmission shaft, and bevel gears b fixedly installed on the rotating shafts of the toggle plate a and the toggle plate b, respectively. The two bevel gears b mesh with the two bevel gears a, respectively.

[0007] The housing is also provided with a support assembly for loading the filter element body. The support assembly includes a plurality of guide grooves symmetrically opened on the inner wall of the housing, a filter box slidably disposed in the guide grooves, and a filter plate detachably covered on the top of the filter box. The filter element body is housed in the filter box, and the filter box and filter plate are located on the swing cleaning path of the brushing assembly.

[0008] It also includes a shaking component for assisting cleaning, the shaking component including a pressing protrusion fixedly connected to one end of the semi-circular limiting plate, a mating protrusion fixedly connected to the bottom of the filter box and corresponding to the path of the pressing protrusion, and an elastic pressing component disposed below the cover plate and capable of pressing the filter plate downward.

[0009] The elastic clamping component includes multiple telescopic rods fixedly connected to the bottom of the cover plate and a pressure plate fixedly connected to the ends of all the telescopic rods, with the bottom of the pressure plate in contact with the surface of the filter plate.

[0010] The housing is also rotatably connected to a stirring shaft, on which multiple stirring blades are fixedly connected. The stirring shaft and the transmission shaft are both driven by the same driving component or by separate driving components.

[0011] The mating parts on the actuating plate a and the actuating plate b include a mating post that is slidably inserted into the interior of the actuating plate, and an elastic member disposed between the mating post and the inner cavity of the actuating plate.

[0012] The top of the cover plate has a liquid inlet, and the side walls of the box body have a catalyst inlet and a drain hole, respectively.

[0013] Compared with the prior art, the advantages of the present invention are as follows: 1. This invention uses two counter-rotating actuating plates in a left-right swinging assembly to alternately drive a triangular mating plate with actuating groove to swing. The triangular mating plate directly drives a brushing assembly with bristles to perform horizontal reciprocating motion, so that the bristles continuously mechanically brush the surface of the filter plate. This process is completely automatic and can promptly remove sticky impurities attached to the filter plate, thereby avoiding the problems of filter pore blockage and increased filtration resistance caused by long-term accumulation of impurities, and ensuring the stability of filtration flux.

[0014] 2. The cleaning mechanism of this invention is not a simple horizontal brushing. On the one hand, the movable mating parts in the left and right swinging components generate high-frequency micro-vibrations during engagement and disengagement, which are transmitted to the bristles, forming a composite cleaning mode of "brushing plus vibration". This is more effective at removing dirt with strong adhesion. On the other hand, the shaking component linked with the swinging mechanism periodically lifts and releases the entire filter box that carries the filter element, causing it to vibrate vertically. This action not only allows the bristles to penetrate deeper into the filter holes for unblocking, but also loosens and removes impurities embedded deep in the filter material through strong vibration, thereby achieving deep cleaning of the filter element. This is an effect that is difficult to achieve with traditional fixed brushing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is the present invention. Figure 1 A sectional view; Figure 3 This is the present invention. Figure 1 Disassembly diagram; Figure 4 This is a schematic diagram of the guide groove structure of the present invention; Figure 5 This is a schematic diagram of the filter element body structure of the present invention; Figure 6 This is a schematic diagram of the left and right swinging component structure of the present invention; Figure 7 This is a schematic diagram of the jitter component structure of the present invention; Figure 8 This is a schematic diagram of the triangular mating plate structure of the present invention; Figure 9 This is a schematic diagram of the mating part structure of the present invention.

[0016] Labeling Explanation: 1. Housing; 101. Cover Plate; 102. Filter Element Body; 2. Connecting Rod; 201. Triangular Fitting Plate; 202. Actuating Groove; 203. Connecting Plate; 204. Actuating Plate a; 205. Actuating Plate b; 206. Fitting Column; 207. Elastic Component; 208. Semi-circular Limiting Plate; 3. Mounting Plate a; 301. Mounting Plate b; 302. Brush Bristle; 4. Drive Shaft; 401. Bevel Gear a; 402. Bevel Gear b; 5. Guide Groove; 501. Filter Box; 502. Filter Plate; 6. Extrusion Protrusion; 601. Fitting Protrusion; 602. Telescopic Rod; 603. Pressure Plate; 7. Stirring Shaft; 701. Stirring Blade; 702. Drive Component; 8. Liquid Inlet; 801. Catalyst Liquid Inlet; 802. Drain Hole. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figure 1-9 The diagram shown is an embodiment of a multi-stage filtration treatment device for acidified wastewater provided by the present invention, including a housing 1, a cover plate 101 installed on the housing 1, and multiple filter core bodies 102 disposed inside the housing 1. The housing 1 is equipped with a swing cleaning mechanism to prevent the filter element body 102 from becoming clogged; The oscillating cleaning mechanism includes a left-right oscillating component and a brushing component driven by the left-right oscillating component to oscillate back and forth. The left and right swinging component includes a connecting rod 2 that is rotatably connected inside the housing 1, and a brushing component is installed on the connecting rod 2; One end of the connecting rod 2 is fixedly connected to a triangular mating plate 201, and the circumferential surface of the triangular mating plate 201 is provided with multiple actuating grooves 202; Connecting plates 203 are symmetrically fixedly connected to the housing 1, and a lever plate a204 and a lever plate b205 are rotatably connected to the two connecting plates 203 respectively; Both the actuating plate a204 and the actuating plate b205 are provided with retractable mating parts. These mating parts can alternately engage with the actuating groove 202 on the triangular mating plate 201 when the actuating plate a204 and the actuating plate b205 rotate, so as to drive the triangular mating plate 201 and the connecting rod 2 to reciprocate. A semi-circular limiting plate 208 is also fixedly connected to the actuating plate a204. The arc surface of the semi-circular limiting plate 208 cooperates with the side of the triangular mating plate 201 to limit the triangular mating plate 201 when the actuating plate b205 drives the connecting rod 2 to rotate. When the actuating plate a204 and the actuating plate b205 alternately drive the triangular mating plate 201 through their mating parts, the connecting rod 2 drives the brushing assembly to automatically and continuously reciprocate, thereby achieving online cleaning of the surface of the filter plate 502 and the bottom of the filter box 501. This effectively prevents the filter holes of the filter plate 502 from becoming clogged, avoids frequent shutdowns for disassembly and cleaning, and significantly improves processing efficiency and device continuity.

[0018] The brushing assembly includes a mounting plate a3 fixedly connected to the connecting rod 2 and a mounting plate b301 detachably connected to the connecting rod 2. Brush bristles 302 are provided on the opposite surfaces of the mounting plate a3 and the mounting plate b301. When the supporting component is located between the two, the oscillating brush bristles 302 can simultaneously perform bidirectional brushing on the upper surface of the filter plate 502 and the bottom of the filter box 501, cleaning without dead corners and improving the thoroughness of cleaning. In addition, the mounting plate b301 is detachable, which provides convenience for maintenance.

[0019] The swing cleaning mechanism also includes a transmission assembly for driving the rotation of the actuating plate a204 and the actuating plate b205. The transmission assembly includes a transmission shaft 4 rotatably connected in the housing 1, two bevel gears a401 fixedly sleeved on the transmission shaft 4, and bevel gears b402 fixedly installed on the rotating shafts of the actuating plate a204 and the actuating plate b205 respectively. The two bevel gears b402 mesh with the two bevel gears a401 respectively. Driven by a drive unit 702, the transmission shaft 4 can be driven synchronously and precisely via a bevel gear pair to rotate the actuating plate a204 and the actuating plate b205 in opposite directions. The power transmission is stable and reliable, ensuring the periodicity and coordination of the swing cleaning action.

[0020] The housing 1 is also provided with a support assembly for loading the filter element body 102. The support assembly includes a plurality of guide grooves 5 symmetrically opened on the inner wall of the housing 1, a filter box 501 slidably disposed in the guide grooves 5, and a filter plate 502 detachably covered on the top of the filter box 501. The filter element body 102 is housed in the filter box 501, and the filter box 501 and the filter plate 502 are located on the swing cleaning path of the brushing assembly. The filter element body 102 is centrally loaded into the filter box 501, which can slide along the guide groove 5, making the entire filter unit easy to install or remove as a whole, greatly facilitating batch replacement or deep maintenance. At the same time, its sliding setting also provides a structural basis for its participation in subsequent shaking actions.

[0021] It also includes a shaking component for assisting cleaning. The shaking component includes a pressing protrusion 6 fixedly connected to one end of the semi-circular limiting plate 208, a mating protrusion 601 fixedly connected to the bottom of the filter box 501 and corresponding to the path of the pressing protrusion 6, and an elastic pressing component disposed below the cover plate 101 and capable of pressing the filter plate 502 downward. When the semi-circular limiting plate 208 drives the extrusion protrusion 6 to rotate, it periodically pushes up the cooperating protrusion 601, causing the entire bearing assembly to be lifted. This action allows the bristles 302 to penetrate deeper into the mesh of the filter plate 502 for unblocking. On the other hand, the bearing assembly is then reset and impacted under the action of the elastic pressing component, generating vertical vibration, which can effectively loosen deep-adhered impurities and double the cleaning effect.

[0022] The elastic clamping component includes multiple telescopic rods 602 fixedly connected to the bottom of the cover plate 101 and a pressure plate 603 fixedly connected to the ends of all the telescopic rods 602. The bottom of the pressure plate 603 is in contact with the surface of the filter plate 502. The telescopic rod 602 and the pressure plate 603 not only provide the reset spring force and motion guidance required when the bearing component shakes, ensuring the stable shaking action, but also continuously press the filter plate 502 with the pressure plate 603 to ensure the sealing of the filter plate 502, while restricting the bearing component to move only in the vertical direction.

[0023] Inside the housing 1, a stirring shaft 7 is rotatably connected. Multiple stirring blades 701 are fixedly connected to the stirring shaft 7. The stirring shaft 7 and the transmission shaft 4 are both driven by the same driving component 702 or by independent driving components. The rotation of the stirring blade 701 can continuously agitate the wastewater in the tank 1, which can prevent suspended solids from settling and promote the thorough and uniform mixing of wastewater with the reagent added through the catalyst inlet 801, thereby improving the efficiency and effect of subsequent chemical treatment and forming a synergy with the filtration function.

[0024] The mating parts on the toggle plate a204 and the toggle plate b205 include a mating post 206 that is slidably inserted into the inside therein, and an elastic member 207 disposed between the mating post 206 and the inner cavity of the toggle plate; Because there is a gap between the mating post 206 and the actuating plate and it is supported by the elastic element 207, it will produce a "yield-reset" micro-movement during the engagement with the actuating groove 202. This micro-movement is transmitted to the brushing assembly, which superimposes a high-frequency slight vibration on the basis of macro-oscillation. This composite motion can more effectively remove adhesive impurities and significantly improve the cleaning efficiency of brushing.

[0025] The top of the cover plate 101 is provided with a liquid inlet 8, and the side wall of the box body 1 is provided with a catalyst liquid inlet 801 and a liquid outlet 802 respectively. Acidified wastewater enters continuously through inlet 8, and catalyst can be precisely added as needed through catalyst inlet 801. The treated clear liquid is discharged in an orderly manner through drain hole 802, ensuring the continuous and controllable operation of the entire filtration process.

[0026] The working principle of this multi-stage filtration treatment device for acidified wastewater is as follows: The acidified wastewater enters the tank 1 through the inlet 8. The impurities in the wastewater are mainly intercepted and filtered by the filter plate 502 and multiple filter cartridges 102 installed in the tank 1. To prevent the filter plate 502 from clogging due to the accumulation of impurities, the device has an automatic swing cleaning mechanism that works continuously. The core driving force of the swing cleaning mechanism comes from the transmission component. When the drive component 702 is activated, it drives the transmission shaft 4 to rotate, which in turn causes the two bevel gears a401 fixed on it to rotate synchronously. The bevel gears a401 mesh with the bevel gears b402 respectively installed on the rotating shafts of the actuating plate a204 and the actuating plate b205, thereby driving the actuating plate a204 and the actuating plate b205 to perform continuous rotational movements in opposite directions. When the actuating plate a204 rotates, its internal mating part (consisting of a slidingly inserted mating post 206 and an elastic element 207 providing elasticity) first contacts and engages with an actuating groove 202 on the circumferential surface of the triangular mating plate 201 at the end of the connecting rod 2. Because there is a play between the mating post 206 and the actuating plates a204 and b205, and it is supported by the elastic element 207, when the mating post 206 slides into or out of the actuating groove 202, it generates a slight radial displacement under the guidance of the groove wall, compressing the elastic element 207. Subsequently, it returns to its original position under the restoring force of the elastic element 207. This subtle "yielding-reset" action is transmitted to the brushing assembly, causing it to superimpose a higher frequency of slight vibration on top of the main body's reciprocating oscillation. The movement of the connecting rod 2, which is fixed to the triangular mating plate 201, causes the connecting rod 2 to rotate counterclockwise at a certain angle. The rotation of the connecting rod 2 directly drives the brushing assembly mounted on it to swing. The brushing assembly consists of a fixed mounting plate a3 and a detachable mounting plate b301. Since the bearing component is located between the two, the bristles 302 on the opposite surfaces of the two brushes brush the surface of the filter plate 502 and the bottom of the filter box 501. During the rotation of the connecting rod 2 driven by the actuating plate a204, the semi-circular limiting plate 208 fixed on the actuating plate a204 will fit the side of the triangular mating plate 201 with its arc surface to provide a temporary limiting effect. As the actuating plate a204 continues to rotate, the mating post 206 in its mating part compresses the elastic element 207 under the action of the inclined plane and disengages from the current actuating groove 202. At the same time, the semi-circular limiting plate 208 also separates from the triangular mating plate 201. Then, the mating part on the continuously rotating actuating plate b205 will engage with another actuating groove 202 on the triangular mating plate 201, pushing the triangular mating plate 201 and the connecting rod 2 to rotate in the opposite direction, causing the brush assembly to rotate and swing clockwise at a certain angle. The actuating plate a204 and the actuating plate b205 work alternately in this way, driving the brush assembly and the bristles 302 on it to swing back and forth continuously, thereby automatically and continuously cleaning the surface of the filter core body 102, effectively preventing the filter holes from clogging. The filter cartridge body 102 is mounted in a slidable support assembly, which includes a filter box 501 slidably disposed on the inner wall of the housing 1 via a guide groove 5 and a filter plate 502 covering its top. The entire assembly is positioned on the swing path of the brush bristles 302 to ensure thorough cleaning. To further improve the cleaning effect, the device is also equipped with a shaking component. When the semi-circular limiting plate 208 rotates with the actuating plate a204, the pressing protrusion 6 fixed at one end of it periodically presses upward against the mating protrusion 601 fixed at the bottom of the filter box 501. This pressing action forces the entire support assembly (filter box 501, filter plate 502 and internal filter cartridge body 102) to overcome elastic compression. The pressure of the component moves upward a short distance along the guide groove 5, allowing the bristles 302 to penetrate deeper into the mesh of the filter plate 502, producing a clearing effect. Subsequently, under the reset force of the elastic pressing component (consisting of the telescopic rod 602 fixed to the bottom of the cover plate 101 and the pressure plate 603), the bearing component quickly resets downward, producing a slight impact. This periodic "lifting-resetting" action causes the bearing component to vibrate vertically, effectively loosening and removing deeply attached impurities. At the same time, the elastic pressing component presses the filter plate 502 downward through the pressure plate 603, ensuring the stability and reset guidance of the bearing component during vertical movement. In addition, the stirring shaft 7 and its stirring blades 701 installed inside the tank 1 rotate under the drive of the drive component 702 to stir the wastewater in the tank 1, promoting the uniform mixing of the wastewater with the reagent that may be added through the catalyst inlet 801. Finally, the filtered and treated wastewater is discharged through the drain hole 802 on the side wall of the tank 1. The entire device realizes continuous filtration and online automatic cleaning of acidified liquid wastewater without the need for shutdown and disassembly. When it is necessary to remove the carrier assembly from the housing 1 for deep maintenance or to replace the filter element body 102, firstly, remove the cover plate 101 on the housing 1, and then remove the mounting plate b301 that is detachably connected to the connecting rod 2. After completing the above steps, the carrier assembly (including the filter box 501, filter plate 502 and the internal filter element body 102) can be smoothly lifted upward from the housing 1 along the guide groove 5.

Claims

1. A multi-stage filtration treatment device for acidified wastewater, comprising a housing (1), a cover plate (101) installed on the housing (1), and multiple filter core bodies (102) disposed in the housing (1). Its features are: The housing (1) is equipped with a swing cleaning mechanism to prevent the filter element body (102) from becoming clogged; The swing cleaning mechanism includes a left-right swing component and a brush component driven by the left-right swing component to swing back and forth. The left and right swinging assembly includes a connecting rod (2) rotatably connected inside the housing (1), and the brushing assembly is installed on the connecting rod (2); One end of the connecting rod (2) is fixedly connected to a triangular mating plate (201), and the circumferential surface of the triangular mating plate (201) is provided with a plurality of actuating grooves (202). The box (1) is symmetrically fixedly connected with connecting plates (203), and the two connecting plates (203) are respectively rotatably connected with a toggle plate a (204) and a toggle plate b (205). Both the actuating plate a (204) and the actuating plate b (205) are provided with retractable mating parts. These mating parts can alternately engage with the actuating groove (202) on the triangular mating plate (201) when the actuating plate a (204) and the actuating plate b (205) rotate, so as to drive the triangular mating plate (201) and the connecting rod (2) to reciprocate. A semi-circular limiting plate (208) is also fixedly connected to the actuating plate a (204). The arc surface of the semi-circular limiting plate (208) cooperates with the side of the triangular mating plate (201) to limit the triangular mating plate (201) when the actuating plate b (205) drives the connecting rod (2) to rotate.

2. The multi-stage filtration treatment device for acidified wastewater according to claim 1, characterized in that: The brushing assembly includes a mounting plate a (3) fixedly connected to the connecting rod (2) and a mounting plate b (301) detachably connected to the connecting rod (2). Brush bristles (302) are provided on the opposite surfaces of the mounting plate a (3) and the mounting plate b (301).

3. The multi-stage filtration treatment device for acidified wastewater according to claim 1, characterized in that: The swing cleaning mechanism also includes a transmission assembly for driving the rotation of the actuating plate a (204) and the actuating plate b (205). The transmission assembly includes a transmission shaft (4) rotatably connected in the housing (1), two bevel gears a (401) fixedly sleeved on the transmission shaft (4), and bevel gears b (402) respectively fixedly installed on the rotating shafts of the actuating plate a (204) and the actuating plate b (205). The two bevel gears b (402) mesh with the two bevel gears a (401) respectively.

4. The multi-stage filtration treatment device for acidified wastewater according to claim 1, characterized in that: The housing (1) is also provided with a support assembly for loading the filter core body (102). The support assembly includes a plurality of guide grooves (5) symmetrically opened on the inner wall of the housing (1), a filter box (501) slidably disposed in the guide grooves (5), and a filter plate (502) detachably covered on the top of the filter box (501). The filter core body (102) is housed in the filter box (501), and the filter box (501) and the filter plate (502) are located on the swing cleaning path of the brushing assembly.

5. The multi-stage filtration treatment device for acidified wastewater according to claim 4, characterized in that: It also includes a shaking component for assisting cleaning, the shaking component including a pressing protrusion (6) fixedly connected to one end of the semi-circular limiting plate (208), a mating protrusion (601) fixedly connected to the bottom of the filter box (501) and corresponding to the path of the pressing protrusion (6), and an elastic pressing component disposed below the cover plate (101) and capable of pressing the filter plate (502) downward.

6. The multi-stage filtration treatment device for acidified wastewater according to claim 5, characterized in that: The elastic clamping component includes a plurality of telescopic rods (602) fixedly connected to the bottom of the cover plate (101) and a pressure plate (603) fixedly connected to the ends of all the telescopic rods (602), the bottom of the pressure plate (603) being in contact with the surface of the filter plate (502).

7. The multi-stage filtration treatment device for acidified wastewater according to claim 3, characterized in that: The housing (1) is also rotatably connected to a stirring shaft (7), and multiple stirring blades (701) are fixedly connected to the stirring shaft (7). The stirring shaft (7) and the transmission shaft (4) are both driven by the same driving component (702) or by independent driving components.

8. The multi-stage filtration treatment device for acidified wastewater according to claim 1, characterized in that: The mating parts on the actuating plate a (204) and the actuating plate b (205) include a mating post (206) slidably inserted therein, and an elastic member (207) disposed between the mating post (206) and the inner cavity of the actuating plate.

9. The multi-stage filtration treatment device for acidified wastewater according to claim 1, characterized in that: The top of the cover plate (101) is provided with a liquid inlet (8), and the side wall of the box body (1) is provided with a catalyst liquid inlet (801) and a liquid outlet (802).

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