Wastewater treatment device for water pollution prevention and control

Abstract

The invention relates to a wastewater treatment device for water pollution prevention and control. The wastewater treatment device comprises a filtering tank, a top cover detachably connected to the top of the filtering tank, a driving part detachably connected to the bottom of the filtering tank and a plurality of filtering elements arranged in the filtering tank, the pretreatment assembly is arranged in an inner cavity of the top cover and is used for crushing slightly soluble salt crystals and granular solid impurities in the wastewater; the bearing assembly is arranged in the inner cavity of the filtering tank and is used for loading the filtering element; and the dredging assembly is arranged in the bearing assembly and used for dredging the bearing assembly. According to the invention, before wastewater enters the main filtering area, the driving piece is used for creatively driving the extrusion bottom plate to rotate, and then the crushing pressing plate is periodically pushed by the pushing bulges on the extrusion bottom plate, so that the crushing pressing plate performs violent reciprocating stamping and shearing on the wastewater and impurities contained in the wastewater, and crystals and particles which are easy to cause blockage can be crushed and refined in advance in the pretreatment process; the load of a subsequent filter unit is reduced, and the blocking rate of the filter plate and the filter element is fundamentally relieved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment device for water pollution prevention and control. Background Technology

[0002] With increasingly stringent environmental protection requirements, wastewater generated in industrial production and daily life must be effectively treated before being discharged or reused. Wastewater treatment is a key link in water pollution prevention and control. Among them, physical filtration technology is widely used because of its simple operation and relatively low cost. In existing technologies, common wastewater treatment devices usually include filtration units, which use filter screens, filter plates, filter cartridges or porous filter media to remove suspended solids, some colloids and other impurities in wastewater through interception to achieve the purpose of purification.

[0003] However, in actual operation, especially when treating certain industrial wastewater (such as wastewater from chemical, pharmaceutical, mining, and food processing industries), the wastewater often contains slightly soluble salt crystals formed by hardness ions (such as calcium carbonate and calcium sulfate) and large particulate solid impurities. When these substances directly enter the filtration unit, there are obvious technical defects: specifically, crystalline substances and coarse particulate impurities are very easy to quickly deposit and adhere when flowing through the surface or internal pores of the filter media; the crystals may also continue to grow and stick together with the particulate impurities, causing physical blockage of the pores of the filter media or the formation of a dense filter cake on the surface in a short time. This not only drastically increases the filtration resistance, leading to increased energy consumption, but also seriously shortens the service life of the filter media, requiring frequent backwashing or replacement, increasing operation and maintenance costs and downtime. Summary of the Invention

[0004] The purpose of this invention is to provide a wastewater treatment device for water pollution prevention and control.

[0005] The objective of this invention is achieved through the following technical solution: a wastewater treatment device for water pollution prevention and control, comprising a filter tank, a top cover detachably connected to the top of the filter tank, a drive component detachably connected to the bottom of the filter tank, and multiple filter elements disposed inside the filter tank.

[0006] It also includes a pretreatment component, which is disposed in the inner cavity of the top cover for crushing slightly soluble salt crystals and particulate solid impurities in wastewater; the pretreatment component includes a crushing chamber detachably connected to the top cover, a crushing pressure plate disposed vertically in the crushing chamber, an extrusion base plate rotatably disposed in the inner cavity of the top cover and located below the crushing pressure plate, and a first elastic reset mechanism disposed between the crushing pressure plate and the crushing chamber.

[0007] A support assembly is disposed in the inner cavity of the filter tank for loading the filter element;

[0008] A dredging component, disposed within the bearing component, is used to dredge the bearing component;

[0009] The output shaft of the driving component is connected to the extrusion base plate to drive its rotation; the rotation of the extrusion base plate can drive the crushing plate to perform reciprocating stamping motion through a pushing action.

[0010] The pretreatment assembly also includes a plurality of push protrusions fixedly connected to the upper surface of the extrusion base plate and arranged in a circular array, and a limiting ring fixed to the inner cavity of the top cover and located below the extrusion base plate; the crushing plate is slidably connected to the inner wall of the crushing chamber through a plurality of guide blocks fixedly connected to its surface; the push protrusions correspond to the positions of the guide blocks, and a plurality of first through holes are provided through the crushing plate and the extrusion base plate.

[0011] The first elastic reset unit includes a plurality of first elastic elements, which are disposed between the crushing pressure plate and the crushing chamber; a sealing sleeve is provided on the outside of the first elastic elements.

[0012] The supporting assembly includes a filter box slidably connected to the inner wall of the filter tank and a filter plate detachably connected to the top of the filter box, and the plurality of filter cartridges are disposed inside the filter box.

[0013] The unblocking assembly includes a connecting column that is vertically slidably connected to the filter plate, an unblocking plate that is fixedly connected to the bottom of the connecting column and located in the filter box, and a plurality of unblocking cones that are fixedly connected to one end of the unblocking plate; a second elastic element is provided between the unblocking plate and the top of the filter element.

[0014] The unblocking assembly also includes a track ring fixedly connected to the upper end of the connecting column, and the surface of the track ring is provided with a curved track groove; a plurality of contact columns are fixedly connected to the lower surface of the extrusion base plate, and the lower end of the contact column slides in contact with the track ring.

[0015] The unblocking plate has multiple second through holes, and the positions of the second through holes are staggered with the positions of the filter holes on the filter plate; the position of the unblocking cone corresponds vertically to the positions of the filter holes on the filter plate.

[0016] The output shaft of the drive unit extends upward through the bottom of the filter box and is detachably connected to the extrusion base plate; multiple stirring rods are fixedly connected to the output shaft section located below the filter box; a drain pipe and a reagent injection pipe are respectively connected to the wall of the filter tank, and a control valve is provided on both the drain pipe and the reagent injection pipe.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] 1. This invention creatively utilizes a driving component to rotate the extrusion base plate before the wastewater enters the main filtration zone. This plate, through its push-up protrusions, periodically pushes the crushing plate, subjecting the wastewater and its impurities to intense reciprocating pressure and shearing. This pretreatment process can pre-crush and refine crystals and particles that are prone to clogging, reducing the load on subsequent filtration units and fundamentally alleviating the clogging rate of filter plates and filter elements. This significantly extends their service life and reduces the frequency of replacement.

[0019] 2. This invention designs a synchronous automatic unblocking mechanism. When the driving component drives the extrusion base plate to rotate, it simultaneously drives the contact column on its lower surface to rotate. Through the periodic cooperation between the contact column and the special track groove on the track ring, the unblocking cone can be automatically controlled to accurately insert and withdraw from the filter plate's filter holes, achieving uninterrupted physical unblocking. This mechanism can automatically remove the deposits in the filter holes during the filtration process, avoid the densification of the filter cake, maintain the stability of the filtration flux, reduce the increase in system pressure difference and energy consumption caused by blockage, and reduce the frequency of having to stop for manual cleaning or backwashing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0021] Figure 2 This is a split diagram of an embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the filter tank and top cover of the present invention;

[0023] Figure 4 This is an exploded view of the top cover and pretreatment components of the present invention;

[0024] Figure 5 This is a split view of the preprocessing components of the present invention;

[0025] Figure 6 This is an exploded view of the carrier component and the filter tank of the present invention;

[0026] Figure 7 This is a split view of the load-bearing component and the unblocking component of the present invention;

[0027] Figure 8 This is a diagram showing the fit between the contact post and the trajectory ring of the present invention.

[0028] Labeling Explanation: 1. Filter Tank; 101. Top Cover; 102. Drive Component; 103. Filter Element; 2. Crushing Chamber; 201. Crushing Plate; 202. Extrusion Bottom Plate; 203. Pushing Protrusion; 204. Limiting Ring; 205. Guide Block; 206. First Through Hole; 207. First Elastic Component; 208. Sealing Sleeve; 3. Filter Box; 301. Filter Plate; 4. Connecting Column; 401. Unblocking Plate; 402. Unblocking Cone; 403. Second Elastic Component; 5. Track Ring; 501. Track Groove; 502. Contact Column; 6. Second Through Hole; 7. Stirring Rod; 701. Drain Pipe; 702. Chemical Dosing Pipe. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0030] like Figure 1-8 The diagram shown is a schematic representation of an embodiment of a wastewater treatment device for water pollution prevention provided by the present invention, including a filter tank 1, a top cover 101 detachably connected to the top of the filter tank 1, a drive component 102 detachably connected to the bottom of the filter tank 1, and a plurality of filter elements 103 disposed in the filter tank 1.

[0031] It also includes a pretreatment component, which is disposed in the inner cavity of the top cover 101 for crushing slightly soluble salt crystals and particulate solid impurities in wastewater; the pretreatment component includes a crushing chamber 2 detachably connected to the top cover 101, a crushing pressure plate 201 vertically movable in the crushing chamber 2, an extrusion base plate 202 rotatably disposed in the inner cavity of the top cover 101 and located below the crushing pressure plate 201, and a first elastic reset mechanism disposed between the crushing pressure plate 201 and the crushing chamber 2;

[0032] A support assembly is disposed in the inner cavity of the filter tank 1 and is used to load the filter element 103;

[0033] The unblocking component is installed inside the load-bearing component and is used to unblock the load-bearing component.

[0034] The output shaft of the drive component 102 is connected to the extrusion base plate 202 to drive it to rotate; the rotation of the extrusion base plate 202 can drive the crushing plate 201 to perform reciprocating stamping motion through the pushing action.

[0035] This solution achieves integrated treatment by setting up pretreatment components, load-bearing components, and unblocking components, all driven by a single drive unit 102. Its core benefits are: the drive unit 102 drives the rotatable extrusion base plate 202, which in turn drives the vertically movable crushing plate 201 to perform efficient reciprocating pressing motion through mechanical pushing. This forces the crushing of slightly soluble salt crystals and particulate impurities before the wastewater enters the main filtration zone, preventing clogging of subsequent filtration units from the source. At the same time, this drive also drives the operation of the unblocking components, realizing the integration of crushing pretreatment and self-cleaning functions of the filtration system. The structure is compact and energy consumption is reduced.

[0036] The pretreatment assembly also includes a plurality of push protrusions 203 fixedly connected to the upper surface of the extrusion base plate 202 and arranged in a ring array, and a limiting ring 204 fixed to the inner cavity of the top cover 101 and located below the extrusion base plate 202; the crushing plate 201 is slidably connected to the inner wall of the crushing chamber 2 through a plurality of guide blocks 205 fixedly connected to its surface; the push protrusions 203 and the guide blocks 205 are positioned correspondingly, and a plurality of first through holes 206 are provided through the crushing plate 201 and the extrusion base plate 202;

[0037] The scheme further defines the push protrusion 203, the limiting ring 204, the guide block 205, and the first through hole 206. Its beneficial effects are reflected in the following: the push protrusion 203 of the annular array corresponds to the guide block 205 on the crushing plate 201, which can accurately convert the continuous rotation of the extrusion base plate 202 into a stable and regular vertical reciprocating impact of the crushing plate 201, and the crushing action is reliable; the limiting ring 204 provides stable rotational support and axial limitation for the extrusion base plate 202; the through hole 206 is aligned on the crushing plate 201 and the extrusion base plate 202, which ensures the smooth flow and pressure release of wastewater in the pretreatment chamber, making it easier for impurities to be sheared and crushed when flowing through the through hole, thereby improving the pretreatment efficiency.

[0038] The first elastic reset unit includes a plurality of first elastic elements 207, which are disposed between the crushing plate 201 and the crushing chamber 2; a sealing sleeve 208 is provided on the outside of the first elastic element 207.

[0039] The scheme specifies the first elastic reset unit, including the first elastic element 207 and the sealing sleeve 208. Its beneficial effects are: the first elastic element 207 provides a stable and continuous reset force for the crushing plate 201, ensuring rapid return to position after each push, and guaranteeing the frequency and force of the crushing; the sealing sleeve 208, which is sleeved on the outside of the first elastic element 207, can effectively prevent fine particles and crystals in the wastewater from entering and adhering to or jamming the first elastic element 207, ensuring its sensitivity and service life during long-term operation, and maintaining the reliability of the pretreatment components.

[0040] The supporting components include a filter box 3 that is slidably connected to the inner wall of the filter tank 1 and a filter plate 301 that is detachably connected to the top of the filter box 3, and multiple filter elements 103 are disposed inside the filter box 3.

[0041] The solution defines the supporting components as filter box 3 and filter plate 301. Its advantages are: the filter box 3, which is slidably connected to the inner wall of the filter tank 1, is easy to remove from the tank as a whole, thus facilitating batch replacement, cleaning or maintenance of the filter element 103; the filter plate 301, which is detachably connected to the top of the filter box 3, undertakes the task of initially intercepting large particulate impurities, and its detachable design also facilitates individual cleaning or replacement; this modular design improves the maintainability of the entire filtration system.

[0042] The unblocking assembly includes a connecting column 4 vertically slidably connected to the filter plate 301, an unblocking plate 401 fixedly connected to the bottom end of the connecting column 4 and located in the filter box 3, and a plurality of unblocking cones 402 fixedly connected to one end of the unblocking plate 401; a second elastic element 403 is provided between the unblocking plate 401 and the top end of the filter element 103.

[0043] The solution clarifies the key components of the unblocking assembly, including the connecting column 4, the unblocking plate 401, the unblocking cone 402, and the second elastic element 403. Its beneficial effects are: the connecting column 4, vertically slidably connected to the filter plate 301, transmits the upper drive to the unblocking plate 401 located within the filter box 3; the multiple unblocking cones 402 fixed on the unblocking plate 401 can accurately align with the filter holes on the filter plate 301; and the second elastic element 403, located between the unblocking plate 401 and the top of the filter element 103, provides an upward restoring force for the unblocking plate 401. This structure lays the mechanical foundation for subsequent periodic automatic unblocking.

[0044] The unblocking assembly also includes a track ring 5 fixedly connected to the upper end of the connecting column 4, and the surface of the track ring 5 is provided with a curved track groove 501; a plurality of contact columns 502 are fixedly connected to the lower surface of the extrusion base plate 202, and the lower end of the contact column 502 slides in contact with the track ring 5.

[0045] This design adds a track ring 5, a track groove 501, and a contact post 502. Its core beneficial effect and working principle are as follows: The track ring 5, fixed to the upper end of the connecting post 4, has a curved track groove 501 on its surface, which cooperates with the contact post 502 fixed to the lower surface of the extrusion base plate 202 to form a clever motion conversion mechanism. When the contact post 502 rotates with the extrusion base plate 202, its lower end slides along the surface of the track ring 5. At a specific stage when it slides into the track groove 501, it releases the downward pressure on the track ring 5, triggering the upward unblocking action of the unblocking component. After sliding out of the groove, it resumes downward pressure, causing the unblocking component to reset. This realizes the automatic and periodic conversion of the continuous rotation of the drive component 102 into the up-and-down interlacing motion of the unblocking cone 402, with a high degree of automation.

[0046] The unblocking plate 401 has multiple second through holes 6, and the positions of the second through holes 6 are staggered with the positions of the filter holes on the filter plate 301; the position of the unblocking cone 402 corresponds vertically to the positions of the filter holes on the filter plate 301.

[0047] This solution supplements the second through hole 6 on the unblocking plate 401 and clarifies the positional relationship between the unblocking cone 402 and the filter hole. Its beneficial effects are: the multiple second through holes 6 on the unblocking plate 401 are staggered with the filter hole of the filter plate 301, which ensures that even during the up-and-down movement of the unblocking plate 401, wastewater can flow smoothly into the filter element 103 below through these staggered second through holes 6, avoiding the unblocking action from blocking the normal filtration process; at the same time, the precise vertical correspondence between the unblocking cone 402 and the filter hole of the filter plate 301 ensures that each upward movement can effectively insert into the filter hole for cleaning, resulting in a direct and efficient unblocking effect.

[0048] The output shaft of the drive unit 102 extends upward through the bottom of the filter box 3 and is detachably connected to the extrusion base plate 202; multiple stirring rods 7 are fixedly connected to the output shaft section located below the filter box 3; a drain pipe 701 and a reagent injection pipe 702 are respectively connected to the tank wall of the filter tank 1; and control valves are provided on both the drain pipe 701 and the reagent injection pipe 702.

[0049] This design specifies the connection path of the output shaft of the drive component 102 and adds a stirring rod 7, a drain pipe 701, and a chemical dosing pipe 702. Its advantages are as follows: the output shaft of the drive component 102 extends upwards through the bottom of the filter box 3 and connects to the extrusion base plate 202; this integrated transmission design simplifies the structure. The stirring rod 7, located on the shaft section below the filter box 3, rotates continuously, powerfully agitating the water at the bottom of the tank to prevent sludge deposition. Furthermore, when chemicals are added through the chemical dosing pipe 702, the stirring rod 7 quickly promotes uniform mixing of the chemicals and wastewater, enhancing the chemical reaction or flocculation effect. The drain pipe 701 is used to discharge the purified water, and the control valves on each pipe facilitate precise process control. This further expands the functionality of the device, enabling coordinated operation of multiple stages such as crushing, filtering, dredging, mixing, and chemical dosing.

[0050] The working principle of the device of the present invention is as follows:

[0051] First, connect the wastewater pipe to the pipe in crushing chamber 2. The wastewater is first injected into the detachably connected crushing chamber 2 inside the top cover 101 through the pipe in crushing chamber 2. The drive unit 102 is started, and its output shaft drives the extrusion base plate 202 connected to it to rotate in the inner cavity of the top cover 101. The device has two working modes, which can be switched through simple mechanical operation:

[0052] First mode (crushing pretreatment mode): When it is necessary to crush crystals and particulate matter in wastewater, ensure that the crushing chamber 2 is fixed in the top cover 101 by fasteners; drive component 102 drives the extrusion base plate 202 to rotate in the forward direction; multiple push protrusions 203 fixed to the upper surface of the extrusion base plate 202 and arranged in a circular array rotate accordingly; when the rotating push protrusions 203 pass by and push the guide block 205 on the surface of the crushing plate 201, the crushing plate 201 is pushed upward, and its top contacts the inner cavity top wall of the crushing chamber 2, thus crushing the wastewater and its contained slightly soluble salt crystals and particles retained between them. Solid impurities are subjected to strong compression and crushing; as the pusher protrusion 203 rotates, the crushing plate 201 is pressed down and reset under the restoring force of the first elastic element 207 (externally protected by a sealing sleeve 208) located between it and the crushing chamber 2, completing one impact cycle; during this process, the first through hole 206 aligned with the crushing plate 201 and the extrusion base plate 202 provides a flow channel for wastewater and assists the water flow in carrying impurities through under drastic pressure changes, thereby achieving effective crushing and refinement of impurities in repeated impact cycles; subsequently, the pretreated wastewater is discharged downward into the filter tank 1;

[0053] Second mode (direct filtration mode): When the influent has few impurities and no crushing is required, the fasteners fixing the crushing chamber 2 can be unscrewed, allowing it to rotate freely within the top cover 101. At this time, the drive unit 102 drives the extrusion base plate 202 to rotate in the opposite direction. Since the crushing chamber 2 is not fixed, when the extrusion base plate 202 reverses, the contact action between the push protrusion 203 on it and the guide block 205 will drive the crushing pressure plate 201 and the entire crushing chamber 2 connected to it to rotate together, while the crushing pressure plate 201 will not generate vertical pressing motion. At this time, the rotating crushing pressure plate 201 and the crushing chamber 2 mainly play the role of stirring and mixing. After simple mixing in the chamber, the wastewater can directly enter the next stage, thereby saving energy consumption in the crushing step.

[0054] Regardless of the mode, the wastewater then enters the main body of the filter tank 1. The wastewater is first initially intercepted by the filter plate 301 at the top of the filter box 3, which is slidably connected to the filter tank 1, and then flows into the filter box 3 for deep filtration through multiple filter elements 103. The purified water is discharged through the drain pipe 701 on the tank wall. When it is necessary to add chemicals to the purified wastewater for mixing, the chemicals can be added through the chemical injection pipe 702.

[0055] The automatic unblocking mechanism operating synchronously with the filtration process is as follows: Multiple contact columns 502, rotating together with the extrusion base plate 202, have a movement trajectory divided into two stages. During most of the rotation cycle, the lower end of the contact column 502 contacts and slides against the upper surface (plane) of the trajectory ring 5 fixed to the upper end of the connecting column 4. In this stage, the contact column 502 continuously presses down on the trajectory ring 5, thereby compressing the second elastic element 403 between the unblocking plate 401 and the top of the filter element 103 through the connecting column 4, keeping the entire unblocking mechanism (including the unblocking plate 401 and the unblocking cone 402) in a depressed low position. At this time, the unblocking cone 402 is not inserted into the filter holes of the filter plate 301. When the contact column 502 rotates to align with a specific curved trajectory groove 501 on the trajectory ring 5, it slides into the groove 501. At this moment, the downward pressure of the contact column 502 on the trajectory ring 5 is instantly released; the compressed second elastic element 403 then releases its elastic potential energy and rebounds upwards. The unblocking plate 401, connecting column 4, and track ring 5 are pushed upward as a whole. This upward movement causes the unblocking cone 402 fixed on the unblocking plate 401 to move precisely upward, so that it is inserted into the corresponding filter hole of the upper filter plate 301, thereby achieving forced unblocking. When the contact column 502 continues to rotate with the extrusion base plate 202 and slides out of the track groove 501, its lower end contacts the upper surface of the track ring 5 again and resumes downward pressure, recompressing the second elastic element 403, so that the unblocking assembly is reset to the low position and the unblocking cone 402 exits the filter hole. This cycle repeats, realizing the periodic automatic unblocking of the filter hole of the filter plate 301. The second through hole 6 opened on the unblocking plate 401 is staggered with the filter hole of the filter plate 301, ensuring that the water can still pass smoothly when the unblocking plate moves up and down. In addition, the stirring rod 7 installed on the output shaft of the drive component 102 located below the filter box 3 rotates continuously, which can accelerate the mixing of the agent and wastewater, and at the same time effectively prevent the sedimentation of sludge at the bottom of the tank.

[0056] In summary, this device, through a single drive unit 102, not only achieves flexible switching between pretreatment working modes (crushing or stirring), but also simultaneously drives the periodic automatic unblocking of the filter layer and the continuous stirring of the filter tank 1 to prevent sedimentation and accelerate the mixing of the reagents.

Claims

1. A wastewater treatment device for water pollution prevention and control, comprising a filter tank (1), a top cover (101) detachably connected to the top of the filter tank (1), a drive unit (102) detachably connected to the bottom of the filter tank (1), and a plurality of filter elements (103) disposed in the filter tank (1). Its features are, Also includes: A pretreatment component is provided in the inner cavity of the top cover (101) for breaking up slightly soluble salt crystals and particulate solid impurities in wastewater. The pretreatment assembly includes a crushing chamber (2) detachably connected to the top cover (101), a crushing pressure plate (201) vertically movable in the crushing chamber (2), a pressing bottom plate (202) rotatably disposed in the inner cavity of the top cover (101) and located below the crushing pressure plate (201), and a first elastic reset mechanism disposed between the crushing pressure plate (201) and the crushing chamber (2); A carrier assembly is disposed in the inner cavity of the filter tank (1) for loading the filter element (103). A dredging component, disposed within the bearing component, is used to dredge the bearing component; The output shaft of the driving component (102) is driven to the extrusion base plate (202) to drive it to rotate; the rotation of the extrusion base plate (202) can drive the crushing plate (201) to perform reciprocating stamping motion through the pushing action.

2. The wastewater treatment device for water pollution prevention and control according to claim 1, characterized in that: The pretreatment component also includes a plurality of push protrusions (203) fixedly connected to the upper surface of the extrusion base plate (202) and arranged in a ring array, and a limiting ring (204) fixed to the inner cavity of the top cover (101) and located below the extrusion base plate (202); the crushing plate (201) is slidably connected to the inner wall of the crushing chamber (2) through a plurality of guide blocks (205) fixedly connected to its surface; the push protrusions (203) are positioned corresponding to the guide blocks (205), and a plurality of first through holes (206) are provided on both the crushing plate (201) and the extrusion base plate (202).

3. The wastewater treatment device for water pollution prevention and control according to claim 2, characterized in that: The first elastic reset unit includes a plurality of first elastic elements (207), the first elastic elements (207) are disposed between the crushing pressure plate (201) and the crushing chamber (2); the first elastic elements (207) are covered with a sealing sleeve (208).

4. The wastewater treatment device for water pollution prevention and control according to claim 3, characterized in that: The supporting assembly includes a filter box (3) slidably connected to the inner wall of the filter tank (1) and a filter plate (301) detachably connected to the top of the filter box (3), and the plurality of filter elements (103) are disposed inside the filter box (3).

5. A wastewater treatment device for water pollution prevention and control according to claim 4, characterized in that: The unblocking assembly includes a connecting column (4) vertically slidably connected to the filter plate (301), an unblocking plate (401) fixedly connected to the bottom end of the connecting column (4) and located in the filter box (3), and a plurality of unblocking cones (402) fixedly connected to one end of the unblocking plate (401); a second elastic element (403) is provided between the unblocking plate (401) and the top end of the filter element (103).

6. The wastewater treatment device for water pollution prevention and control according to claim 5, characterized in that: The unblocking assembly also includes a track ring (5) fixedly connected to the upper end of the connecting column (4), and the surface of the track ring (5) is provided with a curved track groove (501); a plurality of contact columns (502) are fixedly connected to the lower surface of the extrusion base plate (202), and the lower end of the contact column (502) slides in contact with the track ring (5).

7. A wastewater treatment device for water pollution prevention and control according to claim 6, characterized in that: The unblocking plate (401) has multiple second through holes (6), and the positions of the second through holes (6) are staggered with the positions of the filter holes on the filter plate (301); the position of the unblocking cone (402) corresponds vertically to the positions of the filter holes on the filter plate (301).

8. A wastewater treatment device for water pollution prevention and control according to claim 7, characterized in that: The output shaft of the drive unit (102) extends through the bottom of the filter box (3) and is detachably connected to the extrusion base plate (202); multiple stirring rods (7) are fixedly connected to the output shaft section located below the filter box (3); a drain pipe (701) and a reagent injection pipe (702) are respectively connected to the tank wall of the filter tank (1); control valves are provided on both the drain pipe (701) and the reagent injection pipe (702).

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