A magnetic powder recovery device for super-magnetic coagulation sewage treatment and a recovery method thereof

Abstract

This invention discloses a magnetic powder recovery device and method for treating supermagnetic coagulation wastewater, relating to the technical field of wastewater treatment. The invention includes multiple crushing chambers disposed inside a treatment tank, each chamber containing a crushing component. A recovery unit, also disposed inside the treatment tank, includes a conveying component, a separation component, and a mixing component. The advantages are: this invention uses crushing rollers to crush the magnetic flocs, and then uses multiple filter plates with decreasing pore diameters from top to bottom to achieve graded crushing of the magnetic flocs, reducing the pressure on individual crushing stages and avoiding the accumulation and clogging of magnetic flocs caused by concentrated crushing. Simultaneously, the synergy of the separation and mixing components not only washes and cleans the surface of the magnetic agglomerates, removing sludge and impurities adhering to the magnetic powder surface, but also allows the adsorption between new magnetic powder and small-diameter magnetic powder to form magnetic agglomerates, improving the recovery rate of small-diameter magnetic powder.

Description

Technical Field

[0001] This invention relates to the technical field of wastewater treatment, and in particular to a magnetic powder recovery device and recovery method for supermagnetic coagulation wastewater treatment. Background Technology

[0002] Due to its advantages of fast settling speed and high pollution removal efficiency, the super magnetic coagulation wastewater treatment process is widely used in municipal sewage upgrading, industrial wastewater deep treatment and other scenarios. After the magnetic powder and pollutants form magnetic flocs, they can be recycled and reused through magnetic powder recovery, thereby reducing treatment costs.

[0003] For example, a magnetic powder recovery device based on magnetic sludge, disclosed in CN221360395U, includes a frame, in which a first collection box, a second collection box and a waste collection box are movably installed through and through, respectively. A first motor is fixedly installed on the outer wall of the frame, and a stirring box is fixedly installed through and through the inner wall of the top of the frame.

[0004] Existing recycling devices typically focus on shearing and crushing the magnetic flocs, lacking a grading structure. This crushing method easily leads to the accumulation of magnetic flocs, causing pipeline blockage and affecting subsequent processes. At the same time, it is prone to splashing and loss when separating and scraping small-diameter magnetic powder, resulting in a low recovery rate of small-diameter magnetic powder. For example, in the aforementioned prior art, the device uses a single shearing blade in a mixing box in conjunction with a single-layer filter plate to achieve the crushing and filtration of magnetic flocs. However, by relying solely on a single permanent magnet to attract magnetic powder, large-sized magnetic flocs are prone to accumulating and getting stuck at the shearing blade. The filter plate is also easily clogged by insufficiently crushed flocs. Furthermore, small-diameter magnetic powder will be mixed inside the sludge and cannot be effectively separated. At the same time, the small-diameter magnetic powder mixed in the sludge has weak magnetism and is prone to detaching from the magnet when subjected to vibration, affecting the overall recovery rate.

[0005] Therefore, there is an urgent need to design a magnetic powder recovery device and recovery method for supermagnetic coagulation wastewater treatment to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a magnetic powder recovery device and method for treating supermagnetic coagulation wastewater, thus solving the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a magnetic powder recovery device for treating supermagnetic coagulation wastewater, comprising multiple crushing chambers disposed inside a treatment tank, and each crushing chamber being provided with a first conveying pipe for conveying magnetic flocs, and further comprising: Each crushing chamber is equipped with a crushing assembly, which has several crushing rollers for crushing magnetic flocs. The recycling unit, located inside the processing tank, includes a conveying component, a separation component, and a mixing component. The processing tank contains a separation chamber. The separation component has two strong magnetic blocks for adsorbing magnetic powder in the sludge. The conveying component is used to convey the crushed sludge and magnetic powder. The separation component is used to separate the magnetic powder from the sludge. The mixing component is used to mix water and new magnetic powder to form a magnetic powder suspension, and then convey the magnetic powder suspension to the separation component to promote the separation and recycling of the magnetic powder. The power chamber is located inside the processing box. The power chamber is equipped with a power unit, which provides power for the operation of the crushing and recycling units.

[0008] Preferably, a controller is fixedly installed on the processing box, a PLC controller is fixedly connected to the controller, a control panel is fixedly connected to the PLC controller, and the control panel and the PLC controller are electrically connected. The control panel controls the start-up, shutdown, and operation status of the crushing component, recycling unit, and power component via a PLC controller.

[0009] Preferably, the crushing assembly includes a transmission rod rotatably connected inside the crushing chamber, a plurality of filter plates are fixedly connected inside the crushing chamber, and the diameter of the filter holes on each filter plate gradually decreases from top to bottom. Each filter plate is rotatably connected to the transmission rod, and a plurality of crushing rollers are rotatably connected to the transmission rod, with every two crushing rollers located on the upper part of each corresponding filter plate. A first conveying pipe is fixedly connected to the feed inlet of the crushing chamber and is used to receive the magnetic flocs conveyed from the sewage treatment tank.

[0010] Preferably, the conveying assembly includes a conveyor belt fixedly connected to the interior of the separation chamber, a second conveying pipe fixedly connected to one side of the separation chamber, and multiple crushing chamber outlets fixedly connected to the second conveying pipe. A spiral conveying rod is rotatably connected inside the second conveying pipe. A first rotating motor is fixedly installed on one side of the separation chamber, and the output end of the first rotating motor passes through the separation chamber and is fixedly connected to the power end of the conveyor belt. A transfer mechanism is provided inside the separation chamber. The second conveying pipe is used to transport the mixture of sludge and magnetic powder onto the conveyor belt.

[0011] Preferably, the transfer mechanism includes a powder discharge pipe and a sludge discharge pipe installed inside the separation chamber. The sludge discharge pipe is located at the lower part of one end of the conveyor belt. An air pump is installed on one side of the processing box. The air pump is used to promote the transfer efficiency of the separated sludge and magnetic powder. A three-way air pipe is fixedly connected to the air pump. The two air outlets of the three-way air pipe are fixedly connected to the powder discharge pipe and the sludge discharge pipe, respectively. A vertical scraper is fixedly connected inside the separation chamber. The vertical scraper is located at the lower part of one end of the conveyor belt.

[0012] Preferably, the separation assembly includes weak magnetic blocks disposed on both sides of the separation chamber, strong magnetic blocks located on both sides of the inner wall of the separation chamber, a linear motor fixedly installed on the upper part of the separation chamber, a connecting frame fixedly installed on the mover of the linear motor, a fixing frame fixedly installed on both sides of the connecting frame, two rotating spring rods fixedly installed on the fixing frame, an inclined scraper fixedly installed on the rotating end of each of the rotating spring rods, and a limiting frame for limiting the position of the inclined scraper fixedly installed on each fixing frame.

[0013] Preferably, the mixing assembly includes a mixing chamber disposed at the lower part of the separation chamber, a stirring element rotatably connected inside the mixing chamber, a water supply pipe fixedly connected to the mixing chamber, a powder storage tank fixedly connected to the mixing chamber, a first magnetic powder pump fixedly installed at the connection between the mixing chamber and the powder storage tank, a third conveying pipe fixedly connected to the mixing chamber, a second magnetic powder pump for conveying magnetic powder suspension fixedly installed on the third conveying pipe, and a spraying mechanism for spraying magnetic powder suspension is provided between the third conveying pipe and the connecting frame.

[0014] Preferably, the spraying mechanism includes a spray pipe fixedly connected to the connecting frame, and several nozzles for spraying magnetic powder suspension onto the strong magnetic block are fixedly connected to both sides of the spray pipe. A telescopic pipe is fixedly connected to one end of the third delivery pipe, and the spray pipe and the telescopic pipe are fixedly connected.

[0015] Preferably, the power assembly includes a second rotating motor fixedly installed on the outside of the power room, a first transmission shaft fixedly connected between the drive end of the second rotating motor and the power room, a second transmission shaft and a third transmission shaft rotatably installed inside the power room, and sprockets fixedly connected to the first transmission shaft, the second transmission shaft and the third transmission shaft, and a transmission chain belt for transmitting power is sleeved between the plurality of sprockets; Multiple first helical gears are fixedly installed on the first transmission shaft, and a second helical gear that meshes with the corresponding first helical gear is fixedly connected to one end of each transmission rod; One end of the second drive shaft passes through the power chamber and is fixedly connected to one end of the second conveying pipe and the screw conveyor rod. One end of the third drive shaft passes through the power chamber and is fixedly connected to one end of the mixing chamber and the agitator.

[0016] A method for recovering magnetic powder used in supermagnetic coagulation wastewater treatment, comprising the above-mentioned magnetic powder recovery device for supermagnetic coagulation wastewater treatment, including the following steps: S1. The magnetic flocculent to be processed is conveyed to the crushing chamber through the first conveying pipe; S2. The power component drives the crushing component to operate, crushing the magnetic flocs and separating the sludge and magnetic powder that are bound together. S3. The separated magnetic powder and sludge are conveyed to the separation chamber via a conveying assembly. S4. During the movement of the magnetic powder in the separation chamber, it is adsorbed by strong magnetic blocks, and then the magnetic powder suspension generated by the mixing component washes away the magnetic powder and collects the sludge. S5. During the flushing process, the new magnetic powder in the magnetic powder suspension adsorbs and agglomerates with the magnetic powder on the strong magnetic block, forming magnetic agglomerates, which are then scraped off and collected by the separation component.

[0017] This invention provides a magnetic powder recovery device and method for treating supermagnetic coagulation wastewater. It offers the following advantages: 1. When recycling magnetic powder, this recycling device uses a crushing component to grade and crush the magnetic flocs, achieving step-by-step crushing from large to small, reducing the pressure of individual crushing stages, avoiding the accumulation of magnetic flocs and pipeline blockage caused by concentrated crushing, and greatly improving crushing efficiency and the stability of continuous equipment operation.

[0018] 2. When this recycling device recycles magnetic powder, the separation component is used to transport the mixture of magnetic powder and sludge. During the transport, the magnetic powder is adsorbed by strong magnetic blocks, realizing the rapid separation of magnetic powder and sludge. During the transport process, the sludge is transported to the sludge discharge pipe by the conveyor belt for sludge recycling.

[0019] 3. When this recycling device recovers magnetic powder, the mixing component is used to spray magnetic powder suspension onto the surface of the strong magnetic block. The magnetic powder suspension washes and cleans the magnetic powder on the surface of the strong magnetic block, efficiently removing residual sludge adsorbed on the surface of the magnetic powder. The new magnetic powder in the magnetic powder suspension is fully dispersed in the water and comes into uniform contact with the small-diameter magnetic powder on the surface of the strong magnetic block, so that magnetic agglomerates are formed between the small-diameter magnetic powder and the new magnetic powder, thereby improving the recovery rate of small-diameter magnetic powder.

[0020] 4. When this recycling device recycles magnetic powder, the linear motor drives the nozzle on the spray pipe to move back and forth, so that the magnetic powder suspension can be evenly sprayed on the surface of the strong magnetic block, achieving full-range cleaning of magnetic powder without dead corners. After spraying, the inclined scraper scrapes the magnetic agglomerates on the strong magnetic block into the powder discharge pipe. At the same time, the air pump introduces high-pressure gas into the powder discharge pipe and the sludge discharge pipe. The high-pressure gas forms an auxiliary thrust on the magnetic agglomerates and sludge in the pipe, accelerating the material flow and improving the transfer efficiency of magnetic powder and sludge.

[0021] In summary, this invention uses crushing rollers to crush magnetic flocs, and then uses multiple filter plates with decreasing pore diameters from top to bottom to achieve graded crushing of the magnetic flocs. This reduces the pressure on individual crushing stages and avoids the accumulation and blockage of magnetic flocs caused by concentrated crushing. At the same time, through the synergy of the separation and mixing components, the surface of the magnetic agglomerates can be washed and cleaned to remove sludge and impurities adhering to the surface of the magnetic powder, and the adsorption between new magnetic powder and small-diameter magnetic powder can form magnetic agglomerates, thereby improving the recovery rate of small-diameter magnetic powder.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0023] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a magnetic powder recovery device for supermagnetic coagulation wastewater treatment proposed in this invention; Figure 2 for Figure 1 A schematic diagram of the structure after rotation at a certain angle; Figure 3 for Figure 2 Internal structure diagram of the processing box; Figure 4 for Figure 3 Schematic diagram of the structure of the middle removal processing box; Figure 5 for Figure 4 A schematic diagram of the structure after rotation at a certain angle; Figure 6 for Figure 5 Schematic diagram of the intermediate crushing chamber; Figure 7 for Figure 6 Schematic diagram of the internal structure of the intermediate crushing chamber; Figure 8 for Figure 7 Schematic diagram of the internal structure of the second conveying pipe; Figure 9 for Figure 4 Schematic diagram of the separation chamber; Figure 10 for Figure 9 Schematic diagram of the internal structure of the separation chamber; Figure 11 for Figure 10 A schematic diagram of the structure after rotation at a certain angle; Figure 12 for Figure 10 Side view in the middle; Figure 13 for Figure 10 Schematic diagram of the structure of the powder discharge pipe and the sludge discharge pipe; Figure 14 for Figure 10 Schematic diagram of the middle connecting frame; Figure 15 for Figure 14 Enlarged schematic diagram of the structure at point A; Figure 16 for Figure 10Schematic diagram of the structure of the mixing chamber; Figure 17 for Figure 10 Schematic diagram of the internal structure of the mixing chamber; Figure 18 for Figure 4 A schematic diagram of the power chamber.

[0024] In the diagram: 1. Processing box; 2. Controller; 3. Crushing chamber; 4. First conveying pipe; 5. Filter plate; 6. Transmission rod; 7. Crushing roller; 8. Second conveying pipe; 9. Screw conveyor rod; 10. Separation chamber; 11. Conveyor belt; 12. First rotating motor; 13. Strong magnetic block; 14. Weak magnetic block; 15. Linear motor; 16. Connecting frame; 17. Nozzle; 18. Nozzle head; 19. Fixing frame; 20. Rotary spring rod; 21. Mixing chamber; 22. Agitator; 23. Conveyor... 24. Water pipe; 25. Powder storage tank; 26. First magnetic powder pump; 27. Third conveying pipe; 28. Second magnetic powder pump; 29. ​​Telescopic pipe; 30. Powder discharge pipe; 31. Sludge discharge pipe; 32. Vertical scraper; 33. Three-way air pipe; 34. Air pump; 35. First drive shaft; 36. First helical gear; 37. Second helical gear; 38. Second drive shaft; 39. Third drive shaft; 40. Sprocket; 41. Power chamber; 42. Second rotating motor; 43. Inclined scraper; 44. Limiting frame. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Example 1: Refer to Figure 1 - Figure 5 A magnetic powder recovery device for super magnetic coagulation wastewater treatment includes multiple crushing chambers 3 disposed inside a treatment tank 1, and each crushing chamber 3 is provided with a first conveying pipe 4 for conveying magnetic flocs. The treatment tank 1 serves as an overall support, improving the overall support stability of the recovery device and achieving stable separation of magnetic powder and sludge. The first conveying pipe 4 is fixedly connected to the feed inlet of the crushing chamber 3. The first conveying pipe 4 is used to receive the magnetic flocs conveyed from the wastewater treatment tank and then convey the magnetic flocs to be processed to the crushing chamber 3 for crushing. Magnetic flocs are aggregates formed by the combination of magnetic powder and sludge in wastewater during the ultramagnetic coagulation wastewater treatment process.

[0027] This recycling device also includes: Each crushing chamber 3 is equipped with a crushing component, and the crushing component is equipped with several crushing rollers 7 for crushing magnetic flocs. Multiple filter plates 5 are fixedly connected inside the crushing chamber 3. The filter plates 5 are used to grade and retain magnetic flocs of different specifications, and work with the crushing rollers 7 to achieve step-by-step crushing. The crushing assembly includes a transmission rod 6 rotatably connected inside the crushing chamber 3, which transmits power to the crushing roller 7 to drive it to operate synchronously. The diameter of the filter holes on each filter plate 5 decreases from top to bottom. Each filter plate 5 and the transmission rod 6 are rotatably connected. By using filter holes of different specifications, the magnetic flocs are processed in layers from large to small, thereby distributing the pressure of a single crushing stage, avoiding blockage caused by concentrated crushing of large-sized magnetic flocs, and improving the degree of crushing fineness, so that the magnetic flocs are crushed more thoroughly. Several crushing rollers 7 are rotatably connected to the transmission rod 6. Every two crushing rollers 7 are located on the upper part of each corresponding filter plate 5. The crushing rollers 7 are used to shear and crush the magnetic flocs retained by the filter plate 5, thereby separating the magnetic flocs into magnetic powder and sludge.

[0028] The recycling unit, located inside the processing tank 1, includes a conveying component, a separation component, and a mixing component. The conveying component is used to convey the crushed sludge and magnetic powder, the separation component is used to separate the magnetic powder and sludge, and the mixing component is used to mix water and new magnetic powder to form a magnetic powder suspension, and then convey the magnetic powder suspension to the separation component to promote the separation and recycling of the magnetic powder. A controller 2 is fixedly installed on the processing box 1. A PLC controller is fixedly connected to the controller 2. A control panel is fixedly connected to the PLC controller. The control panel and the PLC controller are electrically connected to realize the manual operation and control of the equipment on the device. The control panel controls the start-up, shutdown, and operation status of the crushing component, recycling unit, and power component through a PLC controller, enabling automated and coordinated operation of each functional module. It is easy to operate, requires minimal operator intervention, and has a high degree of automation.

[0029] Example 2: Refer to Figure 6 - Figure 12 The difference between this embodiment and embodiment one is that the conveying assembly includes a conveyor belt 11 fixedly connected inside the separation chamber 10, and the processing box 1 is provided with a separation chamber 10, which is used to provide a separation space for magnetic powder and sludge. A second conveying pipe 8 is fixedly connected to one side of the separation chamber 10, and the discharge ports of multiple crushing chambers 3 are also fixedly connected to the second conveying pipe 8. The second conveying pipe 8 is used to collect the mixed liquid after crushing in each crushing chamber 3, and connects the crushing chamber 3 and the separation chamber 10 to realize the closed conveying of the mixed liquid and avoid leakage. The second conveying pipe 8 is rotatably connected to a spiral conveying rod 9, which is used to push the mixture in the second conveying pipe 8 evenly onto the conveyor belt 11 to avoid local accumulation. A first rotating motor 12 is fixedly installed on one side of the separation chamber 10. The output end of the first rotating motor 12 passes through the separation chamber 10 and is fixedly connected to the power end of the conveyor belt 11 to provide power to the conveyor belt 11 and drive it to operate stably. The second conveying pipe 8 is used to convey the mixture of sludge and magnetic powder and to convey it onto the conveyor belt 11.

[0030] In a further embodiment, a transfer mechanism is provided inside the separation chamber 10. The transfer mechanism includes a powder discharge pipe 29 and a sludge discharge pipe 30 provided inside the separation chamber 10. The sludge discharge pipe 30 is located at the lower part of one end of the conveyor belt 11. The powder discharge pipe 29 is used to collect the scraped magnetic agglomerates and transport them to a storage location or put them back into the wastewater treatment tank. The sludge discharge pipe 30 is used to collect the separated sludge and transport it to a subsequent processing location for sludge treatment. An air pump 33 is installed on one side of the processing box 1. The air pump 33 is used to promote the transfer efficiency of the separated sludge and magnetic powder. A three-way air pipe 32 is fixedly connected to the air pump 33. The two air outlets of the three-way air pipe 32 are fixedly connected to the powder discharge pipe 29 and the sludge discharge pipe 30, respectively. The air pump 33 diverts high-pressure gas to the powder discharge pipe 29 and the sludge discharge pipe 30 through the three-way air pipe 32, forming a directional airflow thrust in the powder discharge pipe 29 and the sludge discharge pipe 30, which directly acts on the magnetic agglomerates in the powder discharge pipe 29 and the sludge in the sludge discharge pipe 30, promoting the discharge of magnetic agglomerates and sludge. A vertical scraper 31 is fixedly connected inside the separation chamber 10. The vertical scraper 31 is located at the lower part of one end of the conveyor belt 11. The vertical scraper 31 is used to completely scrape the sludge on the surface of the conveyor belt 11 into the sludge discharge pipe 30, and the scraping is thorough and leaves no residue, so as to avoid the sludge adhering to the conveyor belt 11 and affecting subsequent operations.

[0031] Example 3: Refer to Figure 9 - Figure 18 The difference between this embodiment and embodiment two is that the separation component includes weak magnetic blocks 14 disposed on both sides of the separation chamber 10. The magnetism of the weak magnetic blocks 14 decreases step by step to guide the magnetic agglomerates to fall smoothly into the powder discharge pipe 29. The separation component is equipped with two strong magnetic blocks 13 for adsorbing magnetic powder in sludge. The strong magnetic blocks 13 are located on both sides of the inner wall of the separation chamber 10. The strong magnetic blocks 13 are used to efficiently adsorb magnetic powder in the mixture, so as to realize the rapid separation of magnetic powder and sludge. The strong magnetic blocks 13 are symmetrically installed on the side wall of the separation chamber 10. The adsorption efficiency is high, and the magnetic powder mixed with sludge can be quickly adsorbed to the surface, laying the foundation for subsequent cleaning and agglomeration. A linear motor 15 is fixedly installed on the upper part of the separation chamber 10. A connecting frame 16 is fixedly installed on the mover of the linear motor 15. The linear motor 15 is used to drive the connecting frame 16 to reciprocate, so that the connecting frame 16 moves along the conveyor belt 11. Both sides of the connecting frame 16 are fixedly installed with a fixing frame 19. Two rotating spring rods 20 are fixedly installed on the fixing frame 19. A slanted scraper 42 is fixedly installed on the rotating end of each rotating spring rod 20. A limiting frame 43 for limiting the position of the slanted scraper 42 is fixedly installed on each fixing frame 19. The fixing frame 19 is used to fix the rotating spring rod 20. The rotating spring rod 20 is used to adjust the angle of the inclined scraper 42. The inclined scraper 42 is used to scrape off the magnetic agglomerates on the surface of the strong magnetic block 13 and make them fall into the powder discharge pipe 29. The limiting frame 43 is used to limit the rotation angle of the inclined scraper 42 on the rotating spring rod 20, so as to prevent the inclined scraper 42 from being unable to apply pressure to the surface of the strong magnetic block 13 when scraping off the magnetic agglomerates due to the rotation of the rotating spring rod 20. When the fixed frame 19 moves toward the second conveying pipe 8, and the inclined scraper 42 is not limited by the limiting frame 43 when moving toward the second conveying pipe 8, the inclined scraper 42 will not apply pressure to the strong magnetic block 13, so that it will not scrape off the strong magnetic block 13 when moving toward the second conveying pipe 8. When moving away from the second conveying pipe 8, the inclined scraper 42 is limited by the limiting frame 43 and cannot move. Its end will apply a squeezing force to the surface of the strong magnetic block 13, so that when it moves in the opposite direction, it can scrape off the magnetic agglomerates attached to the surface of the strong magnetic block 13.

[0032] In a further embodiment, the mixing component includes a mixing chamber 21 disposed at the lower part of the separation chamber 10. The mixing chamber 21 is used to provide a mixing space for new magnetic powder and water to prepare a magnetic powder suspension. A stirring element 22 is rotatably connected inside the mixing chamber 21. The stirring element 22 is used to promote the mixing of new magnetic powder and water to form a uniform magnetic powder suspension. A water supply pipe 23 is fixedly connected to the mixing chamber 21, which is used to inject clean water into the mixing chamber 21. A powder storage tank 24 is fixedly connected to the mixing chamber 21, which is used to store new magnetic powder and continuously supply raw materials to the mixing chamber 21, so that the device does not need to be frequently replenished during operation, thereby improving the continuous operation capability of the equipment. A first magnetic powder pump 25 is fixedly installed at the connection between the mixing chamber 21 and the powder storage tank 24. The first magnetic powder pump 25 is used to quantitatively transport the new magnetic powder in the powder storage tank 24 to the mixing chamber 21. The dosage can be adjusted according to the needs, and the magnetic powder concentration in the suspension can be precisely controlled to provide sufficient new magnetic powder for magnetic powder agglomeration. A third conveying pipe 26 is fixedly connected to the mixing chamber 21. The third conveying pipe 26 is used to convey the magnetic powder suspension prepared in the mixing chamber 21. A second magnetic powder pump 27 for conveying the magnetic powder suspension is fixedly installed on the third conveying pipe 26. The third conveying pipe 26 is used to convey the magnetic powder suspension, and the second magnetic powder pump 27 provides power for conveying the magnetic powder suspension.

[0033] A spraying mechanism for spraying magnetic powder suspension is provided between the third conveying pipe 26 and the connecting frame 16. The spraying mechanism includes a spray pipe 17 fixedly connected to the connecting frame 16. Several nozzles 18 for spraying magnetic powder suspension onto the strong magnetic block 13 are fixedly connected to both sides of the spray pipe 17. When the fixed frame 19 moves towards the second conveying pipe 8, the magnetic powder suspension is sprayed onto the surface of the strong magnetic block 13 at a specific angle through the spray pipe 17 and the nozzles 18, so as to achieve the washing of magnetic powder and contact with new magnetic powder. The impact force of the water flow can remove the residual sludge on the surface of the magnetic powder. At the same time, the new magnetic powder is evenly scattered onto the surface of the strong magnetic block 13 with the water flow, promoting the agglomeration of small-diameter magnetic powder. During this process, the linear motor 15 drives the nozzles 18 to move, so as to achieve the comprehensive spraying of the strong magnetic block 13. One end of the third conveying pipe 26 is fixedly connected to the telescopic pipe 28. The nozzle 17 and the telescopic pipe 28 are fixedly connected. The telescopic pipe 28 is used to adapt to the linear motor 15 to drive the reciprocating motion of the nozzle 17, so as to ensure the continuous and stable delivery of the magnetic powder suspension. The telescopic pipe 28 can freely extend, retract and bend without leakage or breakage, ensuring that the suspension delivery is uninterrupted when the spraying mechanism is in motion. In a further embodiment, the power assembly includes a second rotating motor 41 fixedly installed on the outside of the power chamber 40. The second rotating motor 41 is used to provide core power for the entire power assembly. A first transmission shaft 34 is fixedly connected between the drive end of the second rotating motor 41 and the power chamber 40. The first transmission shaft 34 is used to drive the operation of the crushing assembly. The second drive shaft 37 and the third drive shaft 38 are rotatably mounted inside the power chamber 40; and sprockets 39 are fixedly connected to the first drive shaft 34, the second drive shaft 37 and the third drive shaft 38. A transmission chain belt for transmitting power is sleeved between the multiple sprockets 39. The sprockets 39 and the chain belt are used to realize the linkage of the first drive shaft 34, the second drive shaft 37 and the third drive shaft 38, so that one second rotating motor 41 can drive multiple components to operate at the same time, simplifying the power system structure. One end of the second drive shaft 37 passes through the power chamber 40 and is fixedly connected to one end of the second conveying pipe 8 and the screw conveying rod 9. The second drive shaft 37 is used to drive the operation of the screw conveying rod 9, so that the screw conveying rod 9 can convey the mixture in the second conveying pipe 8 to the separation chamber 10. One end of the third drive shaft 38 passes through the power chamber 40 and is fixedly connected to one end of the mixing chamber 21 and the stirring component 22. The third drive shaft 38 is used to drive the operation of the stirring component 22, so that the stirring component 22 can stir and mix the new magnetic powder and water in the mixing chamber 21. Multiple first helical gears 35 are fixedly installed on the first drive shaft 34. Each drive rod 6 has a second helical gear 36 fixedly connected to one end, which meshes with the corresponding first helical gear 35. The first helical gear 35 and the second helical gear 36 are used to change the direction of power transmission, converting the horizontal power of the first drive shaft 34 into the vertical power of the drive rod 6, and driving the crushing roller 7 to rotate.

[0034] The specific working principle of this recycling device is as follows: The operator controls the equipment on the device through the control panel and the PLC controller. During the processing of magnetic flocs, the magnetic flocs to be processed are first conveyed to multiple crushing chambers 3 through multiple first conveying pipes 4. The PLC controller on the controller 2 starts the second rotating motor 41. The power is transmitted to the transmission rod 6 through the first transmission shaft 34, the first helical gear 35 and the second helical gear 36. The transmission rod 6 then drives the crushing rollers 7 on the upper part of each filter plate 5 to rotate synchronously. The crushing rollers 7 crush the magnetic flocs during the rotation. In this process, the filter plates 5 with gradually decreasing pore size from top to bottom are used to achieve graded interception of magnetic flocs. Large-sized magnetic flocs are first intercepted and crushed by the upper large-pore filter plate 5, and then passed through the middle and lower small-pore filter plates 5 for secondary and tertiary crushing to achieve layered crushing, thereby avoiding blockage and accumulation caused by concentrated crushing, and allowing the magnetic flocs to be fully dissociated into a mixture of magnetic powder and sludge. The crushed mixture is collected in the second conveying pipe 8. The second drive shaft 37 drives the screw conveyor 9 to rotate, and pushes the mixture evenly onto the conveyor belt 11 inside the separation chamber 10. The first rotating motor 12 drives the conveyor belt 11 to move smoothly. When the mixture moves on the conveyor belt 11, the strong magnetic field generated by the strong magnetic blocks 13 on both sides of the conveyor belt 11 efficiently adsorbs the magnetic powder in the mixture. The magnetic powder is adsorbed onto the surface of the strong magnetic blocks 13, realizing the rapid separation of magnetic powder and sludge. The sludge continues to move with the conveyor belt 11. After the sludge moves to the end of the conveyor belt 11, it falls into the sludge discharge pipe 30. The sludge adhering to the surface of the conveyor belt 11 is scraped off by the vertical scraper 31. While the magnetic powder is being separated, the mixing component is started, and the water supply pipe 23 adds clean water to the mixing chamber 21. The first magnetic powder pump 25 delivers a quantitative amount of new magnetic powder from the powder storage tank 24 to the mixing chamber 21. The third drive shaft 38 drives the stirring component 22 to rotate, stirring and mixing the water and new magnetic powder in the mixing chamber 21 to form a uniform magnetic powder suspension. At this time, the linear motor 15 drives the connecting frame 16 to move towards the second conveying pipe 8. During this process, the second magnetic powder pump 27 pumps the magnetic powder suspension into the spray pipe 17 through the third conveying pipe 26 and the telescopic pipe 28. The suspension is then precisely sprayed onto the surface of the strong magnetic block 13 through the nozzle 18. The nozzle 18 sprays while the linear motor 15 moves, so that the magnetic powder suspension can be evenly sprayed onto the surface of the strong magnetic block 13. On the one hand, the liquid can remove the sludge remaining on the surface of the magnetic powder. On the other hand, the new magnetic powder is fully dispersed in the water and evenly contacts the magnetic powder on the strong magnetic block 13, which promotes the formation of stable magnetic agglomerates of small-diameter magnetic powder, laying the foundation for subsequent recycling. After spraying is completed, the linear motor 15 drives the connecting frame 16 to return. At this time, the rotating spring rod 20 adaptively adjusts the angle of the inclined scraper 42 so that the inclined scraper 42 always fits the surface of the strong magnetic block 13 and completely scrapes off the magnetic agglomerates. When the inclined scraper 42 scrapes off the strong magnetic block 13, the limiting frame 43 limits the inclined scraper 42. The magnetic agglomerates on the strong magnetic block 13 are scraped onto the weak magnetic block 14 by the inclined scraper 42. The weak magnetic block 14 forms a flexible magnetic field to limit the magnetic agglomerates, which allows the magnetic agglomerates to fall slowly without affecting their descent. The scraped magnetic powder falls into the powder discharge pipe 29, and the sludge collects in the sludge discharge pipe 30. Then, the air pump 33 starts and diverts high-pressure gas to the powder discharge pipe 29 and the sludge discharge pipe 30 through the three-way air pipe 32, forming a directional airflow thrust. The airflow provides additional power for the magnetic agglomerates and sludge, improving the transfer efficiency, and also impacts the sediment in the powder discharge pipe 29 and the sludge discharge pipe 30, preventing the magnetic powder from depositing in the powder discharge pipe 29 and the sludge from hardening and clogging in the sludge discharge pipe 30. This ensures that the magnetic agglomerates can smoothly enter the subsequent recycling bin for reuse, while the sludge is discharged into the subsequent treatment unit for centralized treatment.

[0035] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A magnetic powder recovery device for super-magnetic coagulation sewage treatment, comprising a plurality of breaking chambers (3) arranged in a treatment tank (1), and a first conveying pipe (4) for conveying magnetic floc is arranged on each breaking chamber (3), characterized in that, Also includes: Each crushing chamber (3) is equipped with a crushing component, and the crushing component is equipped with several crushing rollers (7) for crushing magnetic flocs. The recycling unit is located inside the processing box (1) and includes a conveying component, a separation component and a mixing component. The processing box (1) is provided with a separation chamber (10). The separation component is provided with two strong magnetic blocks (13) for adsorbing magnetic powder in the sludge. The conveying component is used to convey the crushed sludge and magnetic powder. The separation component is used to separate the magnetic powder and sludge. The mixing component is used to mix water and new magnetic powder to form a magnetic powder suspension and to convey the magnetic powder suspension to the separation component to promote the separation and recycling of magnetic powder. The power chamber (40) is located inside the processing box (1). The power chamber (40) is equipped with a power assembly, which is used to provide power for the operation of the crushing assembly and the recycling unit.

2. The magnetic powder recovery device for super-magnetic coagulation sewage treatment according to claim 1, characterized in that, A controller (2) is fixedly installed on the processing box (1), a PLC controller is fixedly connected to the controller (2), a control panel is fixedly connected to the PLC controller, and the control panel and the PLC controller are electrically connected. The control panel controls the start-up, shutdown, and operation status of the crushing component, recycling unit, and power component via a PLC controller.

3. The magnetic powder recovery device for super-magnetic coagulation sewage treatment according to claim 1, characterized in that, The crushing assembly includes a transmission rod (6) rotatably connected inside the crushing chamber (3). Multiple filter plates (5) are fixedly connected inside the crushing chamber (3), and the diameter of the filter holes on each filter plate (5) decreases from top to bottom. Each filter plate (5) is rotatably connected to the transmission rod (6). Several crushing rollers (7) are rotatably connected to the transmission rod (6), and every two crushing rollers (7) are located on the upper part of each corresponding filter plate (5). A first conveying pipe (4) is fixedly connected to the feed inlet of the crushing chamber (3). The first conveying pipe (4) is used to receive the magnetic flocs conveyed by the sewage treatment tank.

4. The magnetic powder recovery device for super-magnetic coagulation sewage treatment according to claim 3, characterized in that, The conveying assembly includes a conveyor belt (11) fixedly connected inside the separation chamber (10). A second conveying pipe (8) is fixedly connected to one side of the separation chamber (10), and the discharge ports of multiple crushing chambers (3) are fixedly connected to the second conveying pipe (8). A spiral conveying rod (9) is rotatably connected inside the second conveying pipe (8). A first rotating motor (12) is fixedly installed on one side of the separation chamber (10). The output end of the first rotating motor (12) passes through the separation chamber (10) and is fixedly connected to the power end of the conveyor belt (11). A transfer mechanism is provided inside the separation chamber (10). The second conveying pipe (8) is used to convey the mixture of sludge and magnetic powder and to convey it onto the conveyor belt (11).

5. A magnetic powder recovery device for supermagnetic coagulation wastewater treatment according to claim 3, characterized in that, The transfer mechanism includes a powder discharge pipe (29) and a sludge discharge pipe (30) installed inside the separation chamber (10). The sludge discharge pipe (30) is located at the lower part of one end of the conveyor belt (11). An air pump (33) is installed on one side of the processing box (1). The air pump (33) is used to promote the transfer efficiency of the separated sludge and magnetic powder. A three-way air pipe (32) is fixedly connected to the air pump (33). The two air outlets of the three-way air pipe (32) are fixedly connected to the powder discharge pipe (29) and the sludge discharge pipe (30) respectively. A vertical scraper (31) is fixedly connected inside the separation chamber (10). The vertical scraper (31) is located at the lower part of one end of the conveyor belt (11).

6. A magnetic powder recovery device for supermagnetic coagulation wastewater treatment according to claim 4, characterized in that, The separation assembly includes weak magnetic blocks (14) disposed on both sides of the separation chamber (10), strong magnetic blocks (13) located on both sides of the inner wall of the separation chamber (10), a linear motor (15) fixedly installed on the upper part of the separation chamber (10), a connecting frame (16) fixedly installed on the mover of the linear motor (15), a fixing frame (19) fixedly installed on both sides of the connecting frame (16), two rotating spring rods (20) fixedly installed on the fixing frame (19), a slanted scraper (42) fixedly installed on the rotating end of each of the rotating spring rods (20), and a limiting frame (43) for limiting the position of the slanted scraper (42) fixedly installed on each of the fixing frames (19).

7. A magnetic powder recovery device for supermagnetic coagulation wastewater treatment according to claim 6, characterized in that, The mixing assembly includes a mixing chamber (21) located at the lower part of the separation chamber (10). A stirring element (22) is rotatably connected inside the mixing chamber (21). A water supply pipe (23) is fixedly connected to the mixing chamber (21). A powder storage tank (24) is fixedly connected to the mixing chamber (21). A first magnetic powder pump (25) is fixedly installed at the connection between the mixing chamber (21) and the powder storage tank (24). A third conveying pipe (26) is fixedly connected to the mixing chamber (21). A second magnetic powder pump (27) for conveying magnetic powder suspension is fixedly installed on the third conveying pipe (26). A spraying mechanism for spraying magnetic powder suspension is provided between the third conveying pipe (26) and the connecting frame (16).

8. A magnetic powder recovery device for supermagnetic coagulation wastewater treatment according to claim 7, characterized in that, The spraying mechanism includes a spray pipe (17) fixedly connected to the connecting frame (16). Both sides of the spray pipe (17) are fixedly connected to a plurality of nozzles (18) for spraying magnetic powder suspension liquid onto the strong magnetic block (13). One end of the third delivery pipe (26) is fixedly connected to a telescopic pipe (28). The spray pipe (17) and the telescopic pipe (28) are fixedly connected.

9. A magnetic powder recovery device for supermagnetic coagulation wastewater treatment according to claim 7, characterized in that, The power assembly includes a second rotating motor (41) fixedly installed on the outside of the power chamber (40). A first transmission shaft (34) is fixedly connected between the drive end of the second rotating motor (41) and the power chamber (40). A second transmission shaft (37) and a third transmission shaft (38) are rotatably installed inside the power chamber (40). A sprocket (39) is fixedly connected to the first transmission shaft (34), the second transmission shaft (37), and the third transmission shaft (38). A transmission chain belt for transmitting power is sleeved between the multiple sprockets (39). A plurality of first helical gears (35) are fixedly installed on the first transmission shaft (34), and a second helical gear (36) that meshes with the corresponding first helical gear (35) is fixedly connected to one end of each transmission rod (6). One end of the second drive shaft (37) passes through the power chamber (40) and is fixedly connected to one end of the second conveying pipe (8) and the screw conveyor (9). One end of the third drive shaft (38) passes through the power chamber (40) and is fixedly connected to one end of the mixing chamber (21) and the stirring component (22).

10. A method for recovering magnetic powder for supermagnetic coagulation wastewater treatment, used in the magnetic powder recovery device for supermagnetic coagulation wastewater treatment as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. The magnetic flocs to be processed are transported to the crushing chamber (3) through the first conveying pipe (4); S2. The power component drives the crushing component to operate, crushing the magnetic flocs and separating the sludge and magnetic powder that are bound together. S3. The separated magnetic powder and sludge are conveyed to the separation chamber (10) through the conveying assembly; S4. During the movement of the magnetic powder in the separation chamber (10), it is adsorbed by the strong magnetic block (13), and then the magnetic powder suspension generated by the mixing component washes the magnetic powder and collects the sludge. S5. During the flushing process, the new magnetic powder in the magnetic powder suspension adsorbs and agglomerates with the magnetic powder on the strong magnetic block (13), forming magnetic agglomerates, which are then scraped off and collected by the separation component.

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