Vibration pre-separation magnetic medium recovery device and method

Abstract

The invention discloses a vibration pre-separation magnetic medium recovery device and method, which is used for recovering a magnetic medium from wastewater mixed with the magnetic medium and sludge, and comprises a wastewater channel; the vibration device is connected with the wastewater channel and is used for applying vibration to the wastewater in the wastewater channel so as to promote the separation of the magnetic medium and the sludge; at least one part of the annular flexible conveying belt is located in the wastewater channel, the annular flexible conveying belt is used for adsorbing and conveying a magnetic medium, and a plurality of protruding structures are arranged on the outer surface of the annular flexible conveying belt; the at least one magnetic part is fixedly arranged on the inner side of the annular flexible conveying belt and is used for generating a magnetic field, so that the magnetic medium is adsorbed on the outer surface of the annular flexible conveying belt; and the driving mechanism drives the annular flexible conveying belt to operate. Magnetic media and sludge are fully dissociated through vibration pre-separation, stable conveying of the magnetic media is achieved through the annular flexible conveying belt with the protruding structure, and the problems that in the prior art, magnetic media are not fully recycled, and the recycling rate is low are solved.

Description

Technical Field

[0001] This invention belongs to the technical field of water treatment equipment, and particularly relates to a magnetic media recovery device and method with vibration pre-separation. Background Technology

[0002] In wastewater purification processes, magnetic separation technology is often used to recover magnetic media from sludge for recycling. Existing magnetic media recovery equipment typically includes a permanent magnet drum and a permanent magnet corrugated roller. Permanent magnets are installed inside the drum, attracting magnetic media from the wastewater through a magnetic field. As the drum rotates to a position without magnets, the magnetic media separates from the drum and is attracted by the corrugated roller, then is recovered after rinsing with flushing water. However, because the deflocculation step in the pretreatment process often fails to completely separate the magnetic media from the sludge, some magnetic media remains adhered to the sludge, resulting in insufficient adsorption by the permanent magnet drum and a low recovery rate. Furthermore, the magnetic media adsorbed on the smooth drum surface is easily retained due to magnetic attraction and is readily washed away by wastewater and sludge, leading to a low final recovery rate. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a magnetic medium recovery device and method with vibration pre-separation. The magnetic medium is fully separated from the sludge by vibration pre-separation, and the magnetic medium is stably transported by a ring flexible conveyor belt with a raised structure, thus solving the problems of insufficient magnetic medium recovery and low recovery rate in the prior art.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a vibration pre-separation magnetic media recovery device for recovering magnetic media from wastewater containing a mixture of magnetic media and sludge, comprising:

[0005] Wastewater channel, used to contain and transport wastewater;

[0006] A vibration device, connected to the wastewater channel, is used to apply vibration to the wastewater in the wastewater channel to promote the separation of magnetic media and sludge;

[0007] An annular flexible conveyor belt, at least a portion of which is located within the wastewater channel, is used to adsorb and transport magnetic media. The outer surface of the annular flexible conveyor belt is provided with multiple protruding structures.

[0008] At least one magnetic component is fixedly disposed on the inner side of the annular flexible conveyor belt to generate a magnetic field, causing the magnetic medium to be adsorbed onto the outer surface of the annular flexible conveyor belt.

[0009] And a drive mechanism, which is driven by a drive pulley that cooperates with the annular flexible conveyor belt to drive the annular flexible conveyor belt to operate.

[0010] Furthermore, the vibration frequency applied by the vibration device matches the natural frequency of the magnetic medium to excite the magnetic medium to resonate, thereby causing the magnetic medium to aggregate and distribute in a direction perpendicular to the wastewater flow.

[0011] Furthermore, the protruding structures are distributed along the movement direction of the annular flexible conveyor belt, and are used to apply mechanical force to the magnetic medium adsorbed on it when the annular flexible conveyor belt moves, so that the magnetic medium can run stably with the annular flexible conveyor belt.

[0012] Furthermore, the protruding structure is a strip-shaped protrusion extending along the width direction of the annular flexible conveyor belt, and its cross-sectional shape is one of sawtooth, rectangular or triangular.

[0013] Furthermore, the height of the protruding structure does not exceed half the thickness of the annular flexible conveyor belt substrate.

[0014] Furthermore, it also includes a magnetic tensioning wheel, which is disposed on the inner side of the annular flexible conveyor belt and located between two adjacent magnetic components, maintaining a preset gap with the magnetic components on both sides, for supporting and tensioning the annular flexible conveyor belt.

[0015] Furthermore, it also includes a desorption mechanism disposed at the end of the travel of the annular flexible conveyor belt outside the area covered by the magnetic element, for peeling the magnetic medium off the annular flexible conveyor belt.

[0016] Furthermore, the desorption mechanism includes a brush and / or a scraper that are in contact with the outer surface of the annular flexible conveyor belt.

[0017] Furthermore, it also includes a flushing and collecting device, which is located below the desorption mechanism, for catching the magnetic medium that falls after being peeled off, and for conveying the magnetic medium out along the water flow under the flushing action of the water flow.

[0018] A magnetic medium recovery method using a vibration pre-separation magnetic medium recovery device includes the following steps:

[0019] Step S1: Feeding and Resonance Pre-Separation

[0020] Wastewater mixed with magnetic media and sludge is fed into the wastewater channel. At the same time, the vibration device is activated to apply vibration to the wastewater in the wastewater channel that matches the natural frequency of the magnetic media. This excites the magnetic media to resonate, causing it to aggregate and distribute in a direction perpendicular to the flow of wastewater, thereby fully dissociating the magnetic media adhering to the sludge.

[0021] Step S2: Magnetic Adsorption

[0022] Start the drive mechanism to drive the ring flexible conveyor belt to rotate through the drive pulley. At the same time, the magnetic field generated by the magnetic component fixed on the inner side of the ring flexible conveyor belt will efficiently adsorb the magnetic media that have been pre-separated by resonance and distributed in the wastewater to the outer surface of the ring flexible conveyor belt.

[0023] Step S3: Raised surface assists in stable conveying

[0024] As the annular flexible conveyor belt operates, the magnetic medium adsorbed on its outer surface overcomes the adsorption stagnation effect of the strong magnetic field under the thrust applied by multiple protrusions distributed along the direction of movement of the conveyor belt, and runs stably with the annular flexible conveyor belt to the end of the journey away from the area covered by the magnetic components.

[0025] Step S4: Desorption and Collection

[0026] At the location where the magnetic component is no longer covered, the magnetic medium is peeled off from the outer surface of the annular flexible conveyor belt by a desorption mechanism, and the peeled magnetic medium is collected by a washing and collecting device.

[0027] Beneficial Effects: This invention, by installing a vibration device on the wastewater channel, applies vibration to the wastewater before magnetic adsorption, causing the magnetic media adhering to the sludge to fully dissociate, thus solving the problem of insufficient adsorption caused by the adhesion of magnetic media to sludge in existing technologies, and significantly improving the recovery rate of magnetic media. Simultaneously, matching the vibration frequency with the natural frequency of the magnetic media excites the magnetic media to resonate and form an aggregated distribution, further enhancing the pre-separation effect, allowing the magnetic media to enter the adsorption area in a high-density state, improving adsorption efficiency. The outer surface of the annular flexible conveyor belt is provided with a raised structure, which applies a thrust along the direction of movement to the magnetic media adsorbed on it during conveyor belt operation, effectively overcoming the adsorption stagnation effect under the action of a strong magnetic field, ensuring stable transport of the magnetic media to the desorption position. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 A schematic diagram of a structure in which magnetic media aggregate and distribute in a direction perpendicular to the flow of wastewater due to vibration;

[0030] Figure 3 This is a schematic diagram of the structure of a ring-shaped flexible conveyor belt. Detailed Implementation

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] like Figure 1As shown, a vibration pre-separation magnetic media recovery device is used to recover magnetic media from wastewater mixed with magnetic media and sludge. It includes: a wastewater channel 1 for containing and conveying wastewater; a vibration device 2 connected to the wastewater channel 1 for applying vibration to the wastewater in the wastewater channel 1 to promote the separation of magnetic media and sludge; and an annular flexible conveyor belt 3, at least a portion of which is located within the wastewater channel 1 for adsorbing and conveying the magnetic media, such as... Figure 3 As shown, the outer surface of the annular flexible conveyor belt 3 is provided with multiple protrusions 31; at least one magnetic element 4 is fixedly disposed on the inner side of the annular flexible conveyor belt 3 to generate a magnetic field, causing the magnetic medium to be adsorbed onto the outer surface of the annular flexible conveyor belt 3; and a driving mechanism is provided, which drives a drive pulley 5 that cooperates with the annular flexible conveyor belt 3, and a driven pulley 9 that cooperates with the annular flexible conveyor belt 3 to drive the annular flexible conveyor belt 3 to rotate. In this invention, the wastewater channel 1 is used to contain and transport the mixed wastewater to be treated, and the vibration device 2 is rigidly connected to the wastewater channel 1 to apply mechanical vibration to the wastewater before the magnetic adsorption step. The mechanical energy generated by the vibration device 2 gives the solid particles in the wastewater additional kinetic energy. Since the magnetic medium is usually magnetite powder and there are differences in density, particle size and surface physicochemical properties between it and sludge, the two have different motion responses under vibration, thereby causing the mutually adhered magnetic medium and sludge to move relative to each other, achieving preliminary separation. A portion of the annular flexible conveyor belt 3 is immersed in the wastewater channel 1. Magnetic components 4 fixed to its inner side generate a magnetic field, attracting the dissociated magnetic medium to the outer surface of the conveyor belt. The raised structure 31 on the outer surface of the conveyor belt plays a crucial role during operation: when the magnetic medium is attracted to the conveyor belt surface by a strong magnetic field, friction alone is insufficient to ensure synchronous movement with the conveyor belt. The raised structure 31, embedded in the magnetic medium layer, directly transmits the conveyor belt's motion to the magnetic medium, applying a mechanical force along the direction of motion. This means that during conveyor belt operation, a thrust is applied along the direction of motion to the magnetic medium adsorbed on it, preventing the magnetic medium from stagnating or accumulating under the strong magnetic field and ensuring stable transport of the magnetic medium. The drive mechanism drives the annular flexible conveyor belt 3 at a speed of 0.1-1 m / s via the drive pulley 5, enabling continuous operation. This invention combines vibration pre-separation with raised-assisted conveying, solving the problem of insufficient adsorption caused by the adhesion of magnetic medium to sludge, and also addressing the technical challenge of poor transport on smooth surfaces, thus achieving efficient recovery of the magnetic medium.

[0033] like Figure 2As shown, the vibration frequency applied by the vibration device 2 matches the natural frequency of the magnetic medium to excite the magnetic medium to resonate, thereby causing the magnetic medium to aggregate and distribute in the direction perpendicular to the wastewater flow. When the applied vibration frequency is close to the natural frequency of the magnetic medium, the magnetic medium resonates, and the amplitude increases significantly. In the resonant state, the relative motion between the magnetic medium and the sludge is most intense, and the adhesive structure is effectively destroyed. At the same time, the resonance causes the magnetic medium to aggregate and distribute in the direction perpendicular to the wastewater flow, thereby forming a local high-density area and improving the efficiency of subsequent magnetic adsorption.

[0034] like Figure 3 As shown, the protruding structure 31 is distributed along the movement direction of the annular flexible conveyor belt 3, and is used to apply a mechanical force to the magnetic medium adsorbed on it when the annular flexible conveyor belt 3 moves, so that the magnetic medium can run stably with the annular flexible conveyor belt 3. When the magnetic field generated by the magnetic component 4 acts on the magnetic medium, the magnetic medium is subjected to a magnetic force pointing towards the surface of the conveyor belt, and this magnetic force makes the magnetic medium tightly adhere to the surface of the conveyor belt. For a smooth conveyor belt, the static friction between the magnetic medium and the conveyor belt is the only driving force for the magnetic medium to move with the belt, but under the action of a strong magnetic field, the magnetic medium may agglomerate, forming a thicker magnetic medium layer. There is relative movement between the particles inside, resulting in a speed difference between the surface magnetic medium and the surface of the conveyor belt, causing the magnetic medium to stagnate or accumulate. In this invention, the protruding structure 31 is continuously or intermittently distributed along the direction of movement of the conveyor belt. When the conveyor belt is running, the protruding structure 31 is like a tooth embedded in the magnetic medium layer, directly transmitting the movement of the conveyor belt to the magnetic medium and applying a thrust along the direction of movement. This thrust is independent of the friction force and can effectively overcome the stagnation effect caused by magnetic adsorption, ensuring that the magnetic medium layer moves synchronously with the conveyor belt as a whole, and ensuring that the magnetic medium is transported stably and continuously.

[0035] The protruding structure 31 is a strip-shaped protrusion extending along the width direction of the annular flexible conveyor belt 3, thereby forming a continuous transverse baffle. When the conveyor belt is running, it applies a uniform transverse thrust to the magnetic medium layer, avoiding local accumulation caused by concentrated thrust. Its cross-sectional shape is one of sawtooth, rectangular or triangular. Among them, sawtooth protrusion can prevent excessive accumulation of magnetic medium at the root of the protrusion; rectangular protrusion has a thrust surface perpendicular to the surface of the conveyor belt, and the thrust is direct and uniform, which is suitable for magnetic media with larger particle size or strong adhesion; triangular protrusion has both thrust and a certain peeling effect, and its tip can be inserted into the bottom of the magnetic medium layer, which helps to prevent excessive adhesion between the magnetic medium and the conveyor belt while pushing.

[0036] Preferably, the height of the protrusion structure 31 is 0.5mm to 2mm. When the protrusion height is within this range, the protrusion can be effectively embedded inside the magnetic medium layer and make full contact with the material layer to exert a thrust effect. If the protrusion height is less than 0.5mm, it cannot penetrate the material layer and the thrust effect is insufficient. If the protrusion height is greater than 2mm, the top of the protrusion may exceed the material layer, which not only reduces the thrust efficiency but may also cause excessive accumulation of magnetic medium on the material-facing surface of the protrusion.

[0037] Preferably, the spacing between adjacent protrusions 31 is 5mm to 15mm. If the spacing is too small, such as less than 5mm, the protrusions are too dense, and the magnetic medium is not easy to fall into the gap between the protrusions. Instead, there will be an empty phenomenon at the top of the protrusion, which will affect the adsorption stability. If the spacing is too large, such as greater than 15mm, the magnetic medium between adjacent protrusions will not receive the thrust, and local stagnation may occur.

[0038] The total thickness of the annular flexible conveyor belt 3 is no more than 5mm, ensuring that the conveyor belt has sufficient flexibility. The height of the protrusion structure 31 does not exceed half the thickness of the substrate of the annular flexible conveyor belt 3. The protrusion structure 31 is integrally formed or fixedly connected to the substrate. When the conveyor belt bends, the root of the protrusion bears a large bending stress. If the protrusion is too high, the stress concentration at the root will be aggravated, which may easily lead to cracking or falling off of the root of the protrusion. The height of the protrusion is controlled within half the thickness of the substrate to ensure the reliability of the protrusion structure.

[0039] The present invention also includes a magnetic tensioning wheel 6, which is disposed on the inner side of the annular flexible conveyor belt 3 and located between two adjacent magnetic components 4, maintaining a preset gap with the magnetic components 4 on both sides. The preset gap can be 5mm, and it is used to support and tension the annular flexible conveyor belt 3. The magnetic tensioning wheel 6, disposed between adjacent magnetic components, serves two purposes: firstly, it supports and tensions the annular flexible conveyor belt 3, ensuring a tight fit between the conveyor belt and the magnetic components 4; secondly, the tensioning wheel itself is magnetic, which can compensate for weak magnetic field areas between adjacent magnetic components 4, making the magnetic field distribution on the surface of the conveyor belt more continuous and uniform, and preventing the magnetic medium from falling off at the gaps.

[0040] The invention also includes a desorption mechanism 7, located at the end of the travel of the annular flexible conveyor belt 3 outside the coverage area of ​​the magnetic component 4, for peeling the magnetic medium off the annular flexible conveyor belt 3. When the conveyor belt travels to the area outside the coverage area of ​​the magnetic component 4, the magnetic field strength weakens or disappears, the magnetic medium loses its magnetic attraction and tends to fall off under the action of gravity. The desorption mechanism 7 is located at this position and can actively intervene in the desorption process to ensure that the magnetic medium completely leaves the conveyor belt and avoids recycling losses caused by the rotation of the conveyor belt.

[0041] More specifically, this invention provides an embodiment in which the desorption mechanism 7 includes a brush and / or a scraper, the brush and / or scraper contacting the outer surface of the annular flexible conveyor belt 3. The brush, through the elastic contact of its bristles, can sweep away the magnetic medium, suitable for magnetic media with small particle sizes and easy airborne properties; the scraper can forcibly scrape off firmly adhered magnetic media. Both can be used individually or in combination to ensure thorough desorption.

[0042] The invention also includes a rinsing and collecting device 8, located below the desorption mechanism 7, for catching the magnetic medium that falls after desorption and conveying it out along the water flow under the flushing action of the water. The desorbed magnetic medium falls into the rinsing and collecting device under gravity and is then conveyed out along the water flow direction under the flushing action of the water. The water flow not only serves a conveying function but also performs secondary cleaning of the recovered magnetic medium, further removing residual trace amounts of sludge and improving the purity of the recovered magnetic medium.

[0043] The desorbed magnetic medium falls into the collection tank of the flushing and collecting device 8 under the action of gravity, and the flushing water flows at a certain speed and direction (e.g., Figure 1 The water is sprayed from the center (downward and to the right), forming a directional water flow within the collection trough. The magnetic media moves with the water flow and is eventually discharged from the outlet. Importantly, the water flow acts as a transport medium, gathering and directionally transporting the dispersed magnetic media to the collection point, achieving continuous discharge. Furthermore, the water flow performs a secondary cleaning of the magnetic media, further removing residual trace amounts of sludge and improving the purity of the recovered magnetic media. It is important to note that the flow rate and velocity of the rinsing water can be adjusted according to the settling characteristics of the magnetic media to ensure that the magnetic media remains suspended or semi-suspended within the collection trough, preventing sedimentation and accumulation. The outlet of the rinsing and collection device 8 can be connected to subsequent magnetic media dewatering and drying equipment, thus forming a complete recycling production line.

[0044] A magnetic medium recovery method using a vibration pre-separation magnetic medium recovery device includes the following steps:

[0045] Step S1: Feeding and Resonance Pre-Separation

[0046] Wastewater containing magnetic media and sludge is fed into wastewater channel 1. At the same time, vibration device 2 is activated to apply vibration to the wastewater in wastewater channel 1 that matches the natural frequency of the magnetic media. This excites the magnetic media to resonate, causing it to aggregate and distribute in a direction perpendicular to the flow of wastewater, thereby fully dissociating the magnetic media adhering to the sludge.

[0047] Step S2: Magnetic Adsorption

[0048] The drive mechanism is activated, and the annular flexible conveyor belt 3 is driven to rotate through the drive pulley 5. At the same time, the magnetic field generated by the magnetic component 4 fixedly set inside the annular flexible conveyor belt 3 is used to efficiently adsorb the magnetic media that have been pre-separated by resonance and distributed in the wastewater to the outer surface of the annular flexible conveyor belt 3.

[0049] Step S3: Raised surface assists in stable conveying

[0050] As the annular flexible conveyor belt 3 operates, the magnetic medium adsorbed on its outer surface overcomes the adsorption stagnation effect of the strong magnetic field under the thrust applied by multiple protrusions 31 distributed along the direction of movement of the conveyor belt, and runs stably with the annular flexible conveyor belt 3 to the end of the journey away from the area covered by the magnetic component 4.

[0051] Step S4: Desorption and Collection

[0052] At the location detached from the area covered by the magnetic component 4, the magnetic medium is peeled off from the outer surface of the annular flexible conveyor belt 3 by the desorption mechanism 7, and the peeled magnetic medium is collected by the washing and collecting device 8.

[0053] This invention addresses the problem of insufficient adsorption caused by adhesion between the magnetic media and sludge in existing technologies by installing a vibration device on the wastewater channel. This vibration, applied before magnetic adsorption, fully dissociates the magnetic media adhering to the sludge, significantly improving the recovery rate of the magnetic media. Simultaneously, matching the vibration frequency with the natural frequency of the magnetic media excites resonance and aggregation, further enhancing the pre-separation effect. This allows the magnetic media to enter the adsorption zone at a high density, improving adsorption efficiency. The outer surface of the annular flexible conveyor belt features raised structures that apply a thrust along the direction of motion to the magnetic media adsorbed on it during belt operation. This effectively overcomes the adsorption stagnation effect under strong magnetic fields, ensuring stable transport of the magnetic media to the desorption position.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A vibration pre-separation magnetic media recovery device for recovering magnetic media from wastewater containing a mixture of magnetic media and sludge, characterized in that: include: Wastewater channel (1) is used to contain and transport wastewater; Vibration device (2), connected to the wastewater channel (1), is used to apply vibration to the wastewater in the wastewater channel (1) to promote the separation of magnetic medium and sludge; An annular flexible conveyor belt (3), at least a portion of which is located within the wastewater channel (1), is used to adsorb and transport magnetic media. The outer surface of the annular flexible conveyor belt (3) is provided with a plurality of protrusion structures (31). At least one magnetic component (4) is fixedly disposed on the inner side of the annular flexible conveyor belt (3) to generate a magnetic field, so that the magnetic medium is adsorbed onto the outer surface of the annular flexible conveyor belt (3). And a drive mechanism, which is driven by a drive pulley (5) that cooperates with the annular flexible conveyor belt (3) to drive the annular flexible conveyor belt (3) to operate.

2. The magnetic medium recovery device with vibration pre-separation according to claim 1, characterized in that: The vibration device (2) applies a vibration frequency that matches the natural frequency of the magnetic medium to excite the magnetic medium to resonate, thereby causing the magnetic medium to aggregate and distribute in a direction perpendicular to the flow of wastewater.

3. The magnetic medium recovery device with vibration pre-separation according to claim 1, characterized in that: The protruding structure (31) is distributed along the movement direction of the annular flexible conveyor belt (3) and is used to apply mechanical force to the magnetic medium adsorbed on it when the annular flexible conveyor belt (3) moves, so that the magnetic medium can run stably with the annular flexible conveyor belt (3).

4. A magnetic medium recovery device with vibration pre-separation according to claim 1 or 3, characterized in that: The protrusion structure (31) is a strip-shaped protrusion extending along the width direction of the annular flexible conveyor belt (3), and its cross-sectional shape is one of sawtooth, rectangular or triangular.

5. The magnetic medium recovery device with vibration pre-separation according to claim 4, characterized in that: The height of the protruding structure (31) does not exceed half the thickness of the substrate of the annular flexible conveyor belt (3).

6. The magnetic medium recovery device with vibration pre-separation according to claim 1, characterized in that: It also includes a magnetic tensioning wheel (6), which is disposed on the inner side of the annular flexible conveyor belt (3) and located between two adjacent magnetic components (4), maintaining a preset gap with the magnetic components (4) on both sides, for supporting and tensioning the annular flexible conveyor belt (3).

7. The magnetic medium recovery device with vibration pre-separation according to claim 1, characterized in that: It also includes a desorption mechanism (7), which is located at the end of the travel of the annular flexible conveyor belt (3) outside the coverage area of ​​the magnetic element (4), for peeling the magnetic medium off the annular flexible conveyor belt (3).

8. The magnetic medium recovery device with vibration pre-separation according to claim 7, characterized in that: The desorption mechanism (7) includes a brush and / or a scraper that are in contact with the outer surface of the annular flexible conveyor belt (3).

9. A magnetic medium recovery device with vibration pre-separation according to claim 8, characterized in that: It also includes a flushing and collecting device (8), which is located below the desorption mechanism (7) to catch the magnetic medium that falls after being peeled off, and to transport the magnetic medium out along the water flow under the flushing action of the water flow.

10. The magnetic medium recovery method of the vibration pre-separation magnetic medium recovery device according to claim 9, characterized in that: Includes the following steps: Step S1: Feeding and Resonance Pre-Separation Wastewater containing magnetic media and sludge is fed into wastewater channel (1), and vibration device (2) is activated at the same time to apply vibration matching the natural frequency of the magnetic media to the wastewater in wastewater channel (1), thereby exciting the magnetic media to resonate and causing it to aggregate and distribute in the direction perpendicular to the flow of wastewater, thereby fully dissociating the magnetic media adhering to the sludge. Step S2: Magnetic Adsorption Start the drive mechanism and drive the ring flexible conveyor belt (3) to run through the drive pulley (5). At the same time, the magnetic field generated by the magnetic component (4) fixedly set inside the ring flexible conveyor belt (3) will efficiently adsorb the magnetic medium that has been pre-separated by resonance and distributed in the wastewater to the outer surface of the ring flexible conveyor belt (3). Step S3: Raised surface assists in stable conveying As the annular flexible conveyor belt (3) operates, the magnetic medium adsorbed on its outer surface overcomes the adsorption stagnation effect of the strong magnetic field under the thrust applied by the multiple protrusions (31) distributed along the direction of movement of the conveyor belt, and runs stably with the annular flexible conveyor belt (3) to the end of the journey away from the area covered by the magnetic component (4). Step S4: Desorption and Collection At the location detached from the area covered by the magnetic component (4), the magnetic medium is peeled off from the outer surface of the annular flexible conveyor belt (3) by the desorption mechanism (7), and the peeled magnetic medium is collected by the rinsing and collecting device (8).

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