A magnetic separation device for reducing heavy metals in wastewater

Abstract

The present invention belongs to the field of magnetic separation technology, and in particular to a heavy metal magnetic separation device for reducing heavy metals in wastewater. In view of the problem that the existing heavy metals, suspended matter and other pollutants in other positions in the separation tank cannot be removed, and the magnetism of the magnetic disk affects the scraping of heavy metals and other pollutants by the scraper, the following scheme is proposed, including a separation tank, one side of the separation tank is fixedly penetrated by a liquid inlet pipe for injecting wastewater, and the side of the separation tank adjacent to the liquid inlet pipe is fixedly penetrated by a liquid outlet pipe for discharging wastewater; and also including a rotating roller, which rotates in the separation tank, and the outer wall of the rotating roller is fixedly sleeved with multiple magnetic disks. In the present invention, the reciprocating swing of the paddle plate can make the magnetic disk fully adsorb the heavy metals, suspended matter and other pollutants in the separation tank, and when the scraper scrapes the heavy metals, suspended matter and other pollutants on the fan-shaped magnetic plate, the fan-shaped magnetic plate is just powered off, so that the scraper can effectively scrape the pollutants on the fan-shaped magnetic plate.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic separation, in particular to a heavy metal magnetic separation device for reducing wastewater. Background Art

[0002] Magnetic separation plays a crucial role in wastewater treatment. Its high efficiency, environmental friendliness, and adaptability have made it a crucial component of modern wastewater treatment technology. By utilizing magnetic fields to separate magnetic particles or magnetized materials from wastewater, magnetic separation technology can precisely remove pollutants such as heavy metals and suspended solids, significantly improving wastewater quality. Furthermore, magnetic separation technology offers advantages such as a small footprint, low operating costs, and ease of automated control, making it widely used in industrial and municipal wastewater treatment. With continued technological advancement and innovation, magnetic separation technology will play an even more important role in wastewater treatment, making a greater contribution to protecting water resources and the ecological environment.

[0003] However, the existing technology still has the following shortcomings when magnetically separating sewage:

[0004] 1. During magnetic separation, the magnetic disk rotates at a fixed position for magnetic separation, so it is unable to remove pollutants such as heavy metals and suspended matter in other locations in the separation tank, resulting in unsatisfactory magnetic separation efficiency;

[0005] 2. When the magnetic disk rotates for magnetic separation, heavy metals, suspended matter and other pollutants are always attached to the disk. The existing technology generally uses a scraper to scrape off heavy metals, suspended matter and other pollutants. However, the magnetic disk always produces magnetism to heavy metals, suspended matter and other pollutants. Therefore, after the scraper scrapes them off, heavy metals, suspended matter and other pollutants are still attached to the disk, affecting the subsequent magnetic separation operation of the disk.

[0006] In response to the above problems, the present invention document proposes a magnetic separation device for reducing heavy metals in wastewater. Summary of the Invention

[0007] The purpose of the present invention is to solve the shortcomings of the existing magnetic separation equipment that cannot remove heavy metals, suspended matter and other pollutants in other locations in the separation tank, and the magnetism of the magnetic disk affects the scraping of heavy metals and other pollutants by the scraping bar, and to propose a heavy metal magnetic separation equipment for reducing wastewater.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A magnetic separation device for reducing heavy metals in wastewater comprises a separation tank, a liquid inlet pipe for injecting wastewater is fixedly passed through one side of the separation tank, and a liquid outlet pipe for discharging wastewater is fixedly passed through the side of the separation tank adjacent to the liquid inlet pipe;

[0010] The device further comprises a rotating roller, which rotates in the separation tank. The outer wall of the rotating roller is fixedly sleeved with a plurality of magnetic disks for adsorbing heavy metals and suspended dirt in the separation tank. A scraper is fixed in the separation tank and is located on a side of the magnetic disk away from the liquid outlet pipe. The scraper is bent and cooperates with the magnetic disk to scrape off the heavy metals and suspended dirt adsorbed on the magnetic disk.

[0011] It also includes two paddles, which are located on both sides of the magnetic disk and are used to push the wastewater in the separation tank toward the magnetic disk. A separation box is welded on the side of the separation tank away from the liquid outlet pipe to hold the separated heavy metals and suspended dirt;

[0012] The magnetic separation structure is set on the side of the separation tank away from the liquid inlet pipe, which is used to make the scraper easily scrape off heavy metals and suspended dirt on the magnetic disk;

[0013] The swing structure is arranged in the separation tank and is used to drive the two paddles to swing back and forth, and the magnetic separation structure can drive the swing structure to operate;

[0014] The pushing structure is set in the separation tank and is used to push the heavy metals and suspended dirt on the scraper into the separation box;

[0015] The solid-liquid separation structure is arranged on the side of the separation tank away from the liquid outlet pipe, and is used to discharge the wastewater contained in the heavy metals and suspended dirt in the separation box, and the pushing structure drives the solid-liquid separation structure to operate when it is in operation.

[0016] In one possible design, the magnetic separation structure includes a contact ring fixed on the side of the separation tank away from the liquid inlet pipe, and a notch is provided on one side of the contact ring. One end of the rotating roller rotates through the separation tank and is fixed with a third turntable. The third turntable is close to the separation tank and has a plurality of contact blocks arranged in a ring shape, and the contact blocks contact and cooperate with the contact ring. A plurality of scraping grooves are provided in the scraper, and the magnetic disk extends into the scraping grooves. The scraper cooperates with the scraping grooves to scrape off heavy metals and suspended dirt attached to the magnetic disk. The magnetic disk is composed of a plurality of sector-shaped magnetic plates, and the plurality of sector-shaped magnetic plates are arranged in a ring shape and fixed on the outer wall of the rotating roller. A plurality of sector-shaped magnetic plates placed at the same angle cooperate with corresponding contact blocks. The contact blocks cooperate with the contact ring to energize the sector-shaped magnetic plates. The other end of the rotating roller rotates The first motor is fixed to the frame on the side of the top of the separation tank away from the third turntable, and the output shaft of the first motor is connected to the outer wall of the rotating roller through a synchronous wheel and a synchronous belt. When the rotating roller rotates, the sector magnetic plate and the contact block are synchronously driven to rotate, and the sector magnetic plate and the contact block correspond to each other. The contact block contacts the contact ring and energizes the corresponding sector magnetic plate. The sector magnetic plate adsorbs pollutants such as heavy metals and suspended dirt. When the contact block enters the gap, the contact block disengages from the contact ring, and the corresponding sector magnetic plate is powered off. At this time, the sector magnetic plate just moves into the scraping groove, and the heavy metals, suspended dirt and other pollutants are scraped off by the scraper. Therefore, when scraping the pollutants, the adsorption of the sector magnetic plate on them is released, so that the scraper can effectively complete the scraping of the pollutants.

[0017] The two levers are connected along the longitudinal axis to the rotation of the linkage set, wherein the two levers have the first pivot place and the second pivot places, a space is defined between the end of the two levers and the second end of the levers, and the two levers are connected along the longitudinal axis to the rotation of the linkage set.

[0018] The cam is secured to the top of the drive means and is secured to the chassis at the bottom of the drive means and is adapted to move the cam forwardly to the chassis at the top of the drive means. A second magnetic strip is fixed to the inner wall of the part, and the magnetic force between the second magnetic strip and the first magnetic strip drives the push plate to move up, and a discharge port located above the separation box is provided on the side of the separation tank away from the liquid discharge pipe, and the push plate cooperates with the discharge port to discharge the heavy metals and suspended dirt on the scraper into the separation box; the reciprocating screw drives the push plate to move back and forth through the cooperation of the sliding block and the push plate, and pushes the pollutants on the scraper into the separation box through the discharge port; when the push plate moves toward the rotating roller to push the material again, the second magnetic strip generates a magnetic attraction force on the first magnetic strip, and the push plate moves up, so that a gap is generated between the push plate and the scraper, so that the pollutants on the scraper flow to the right under the action of the inclined surface; when the push plate moves to the right again, the magnetic attraction between the second magnetic strip and the first magnetic strip is released, and the push plate contacts the top of the scraper under the action of gravity, and the push plate can push the pollutants into the separation box again.

[0019] In one possible design, the solid-liquid separation structure includes a fixed plate fixed to one side of the separation tank, two guide rods are slidably passed through the fixed plate, the bottom ends of the two guide rods are fixed with the same pressure plate, a filter is fixed in the separation box for placing heavy metals and suspended dirt, and the pressure plate and the filter cooperate to squeeze out the water in the heavy metals and suspended dirt, a reciprocating screw passing through the fixed plate is fixed to the top of the pressure plate, the outer wall thread sleeve of the reciprocating screw is provided with a nut block, the outer wall fixed sleeve of the nut block is provided with a first bevel gear, and the first bevel gear rotates on the top of the fixed plate, and the reciprocating screw is close to the reciprocating screw. A second bevel gear is fixed to one end of the screw, and the second bevel gear is meshed with the first bevel gear to drive the reciprocating screw to rise and fall; when the reciprocating screw rotates to drive the push plate to push the pollutants into the separation box, the cooperation of the second bevel gear and the first bevel gear drives the nut block to rotate, and the cooperation of the nut block and the reciprocating screw drives the pressure plate to move up, so that the push plate pushes the pollutants into the separation box. When the push plate moves toward the rotating roller, the reciprocating screw drives the pressure plate to move down to squeeze the pollutants in the separation box, so as to squeeze out the water in the pollutants and discharge it to the outside through the drainage duct, and then discharge it to the separation tank through the external water pump for repeated magnetic separation.

[0020] In a possible design, the radius of the first turntable is greater than the diameter of the second turntable, so that the second turntable rotates one circle to drive the first turntable to swing back and forth at a certain angle.

[0021] In a possible design, a drainage conduit is fixedly passed through the bottom of the separation box, and the drainage conduit is connected to an external water pump for discharging the sewage squeezed out of the separation box back into the separation tank.

[0022] In one possible design, two inclined plates are fixed to the inner wall of the bottom of the separation tank. The sides of the two inclined plates that are away from each other are fixedly connected to the inner walls on both sides of the liquid inlet pipe. The two inclined plates are located on both sides of the rotating roller and are used to make the sediment in the separation tank converge to the middle.

[0023] The top of the piston rod is fixed with a push rod, and the top of the push rod seals and slides through the bottom inner wall of the separation box and the filter screen, and the push rod cooperates with the pressure plate to drive the piston plate to move downward, and an air guide pipe is fixed on one side of the air injection cylinder, one end of the air guide pipe passes through the inner wall of one side of the separation tank and the inclined plate, and the piston plate cooperates with the air guide pipe to inject the air in the air injection cylinder into the separation tank; when the pressure plate moves down to the separation box to squeeze the pollutants, the pressure plate pushes the piston plate down through the push rod, and the piston plate injects the air in the air injection cylinder into the separation tank through the air guide pipe, and rushes towards the pollutants deposited at the bottom, so that the deposited pollutants flow in the separation tank, so that the magnetic disk can carry out magnetic separation on them, thereby improving the magnetic separation efficiency of sewage.

[0024] In a possible design, a pipe is fixedly passed through the piston plate to allow external gas to enter the bottom of the piston plate. The air guide pipe and the outer wall of the pipe are both provided with a one-way valve to control the flow direction of the air.

[0025] Beneficial effect: In the present invention, the magnetic separation structure includes a contact ring fixed on the side of the separation tank away from the liquid inlet pipe, a notch is provided on one side of the contact ring, a plurality of contact blocks are arranged in a ring shape on the side of the third turntable close to the separation tank, a plurality of scraping grooves are provided in the scraper, the magnetic disk is composed of a plurality of sector-shaped magnetic plates, and the plurality of sector-shaped magnetic plates are fixed in a ring shape on the outer wall of the rotating roller, and the plurality of sector-shaped magnetic plates placed at the same angle cooperate with the corresponding contact blocks; when the rotating roller rotates, the sector-shaped magnetic plates and the contact blocks are synchronously driven to rotate, the contact blocks contact the contact ring and energize the corresponding sector-shaped magnetic plates, and when the contact blocks enter the notch, the corresponding sector-shaped magnetic plates are de-energized, and at this time the sector-shaped magnetic plates just move into the scraping groove, and the pollutants are scraped off by the scrapers, which can effectively complete the scraping of pollutants;

[0026] In the present invention, the two paddle plates are respectively fixedly sleeved on the outer walls of the two fixed shafts, one end of the two fixed shafts rotates through one side of the separation tank and is fixed with a first turntable, a first pin is fixed at a position deviating from the center of one side of the two first turntables, the outer walls of the two first pins are rotatably sleeved with a connecting rod, a second pin is fixed on the side of the second turntable deviating from the center of the circle, and the ends of the two connecting rods close to each other are sleeved on the outer walls of the second pin; the second turntable drives the first turntable and the paddle plate to swing back and forth through the cooperation of the connecting rod, the first pin and the second pin, so as to push the sewage in the separation tank toward the magnetic disk, so that the magnetic disk can fully adsorb pollutants such as heavy metals and suspended dirt in the separation tank, thereby improving the adsorption efficiency;

[0027] In the present invention, a push plate is provided on the top of the scraper, and a sliding block is slidably connected to the push plate through a rectangular groove, and the sliding block is threadedly sleeved on the outer wall of the reciprocating screw, and a first magnetic strip is fixedly embedded on the top of the push plate, and a second magnetic strip is fixed to the top of the separation tank through a U-shaped frame; the reciprocating screw drives the push plate to move back and forth through the cooperation of the sliding block and the push plate, pushing the pollutants on the scraper into the separation box, and the second magnetic strip generates a magnetic attraction force on the first magnetic strip to drive the push plate to move up, so that the pollutants on the scraper flow to the right under the action of the inclined surface, making it convenient for the push plate to continue to push the pollutants into the separation box in the later stage;

[0028] In the present invention, a piston plate is sealingly and slidingly connected in the gas injection cylinder, a push rod is fixed on the top of the piston plate, an air guide tube is fixed on one side of the gas injection cylinder, one end of the air guide tube passes through the inner wall of one side of the separation tank and the inclined plate, and a pipe is fixedly passed through the piston plate; when the pressure plate moves down to the separation box to squeeze the pollutants, the pressure plate pushes the piston plate down through the push rod, and the piston plate injects the air in the gas injection cylinder into the separation tank through the air guide tube, and rushes to the pollutants deposited at the bottom, so that the deposited pollutants flow in the separation tank, so that the magnetic disk can magnetically separate them, thereby improving the magnetic separation efficiency of sewage.

[0029] In the present invention, the reciprocating swing of the paddle plate can enable the magnetic disk to fully adsorb pollutants such as heavy metals and suspended dirt in the separation tank, and when the scraper scrapes off the heavy metals, suspended dirt and other pollutants on the sector-shaped magnetic plate, the sector-shaped magnetic plate is just powered off, so that the scraper can effectively scrape off the pollutants on the sector-shaped magnetic plate. In addition, it can automatically discharge the pollutants and squeeze out the sewage contained therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the three-dimensional structure of a heavy metal magnetic separation device for reducing wastewater provided in Example 1 of the present invention;

[0031] Figure 2 This is a schematic cross-sectional view of a heavy metal magnetic separation device for reducing wastewater provided in Example 1 of the present invention;

[0032] Figure 3 A schematic diagram of a three-dimensional exploded structure of a first turntable, a second turntable, and a first motor of a magnetic separation device for reducing heavy metals in wastewater provided by Example 1 of the present invention;

[0033] Figure 4 A schematic diagram of a three-dimensional exploded structure of a sector-shaped magnetic plate and a scraper of a magnetic separation device for reducing heavy metals in wastewater provided in Example 1 of the present invention;

[0034] Figure 5 A schematic diagram of a three-dimensional exploded structure of a contact block and a contact ring of a magnetic separation device for reducing heavy metals in wastewater provided in Example 1 of the present invention;

[0035] Figure 6 A schematic diagram of a three-dimensional exploded structure of a scraper, a pusher plate, and a U-shaped frame of a magnetic separation device for reducing heavy metals in wastewater provided in Example 1 of the present invention;

[0036] Figure 7 A schematic diagram of a three-dimensional exploded structure of a separation box, a filter screen, and a pressure plate of a magnetic separation device for reducing heavy metals in wastewater provided in Example 1 of the present invention;

[0037] Figure 8 A schematic diagram of a three-dimensional exploded structure of a first bevel gear, a nut block, and a second bevel gear of a magnetic separation device for reducing heavy metals in wastewater provided by Example 1 of the present invention;

[0038] Figure 9 This is a schematic cross-sectional view of a magnetic separation device for reducing heavy metals in wastewater provided in Example 2 of the present invention;

[0039] Figure 10 This is a schematic cross-sectional structural diagram of an air injection cylinder of a heavy metal magnetic separation device for reducing wastewater provided in Example 2 of the present invention.

[0040] Figure: 1, separation tank; 2, liquid inlet pipe; 3, liquid outlet pipe; 4, rotating roller; 5, magnetic disk; 6, sector magnetic plate; 7, first motor; 8, scraper; 9, scraper groove; 10, fixed shaft; 11, paddle plate; 12, first turntable; 13, first pin; 14, second turntable; 15, second pin; 16, connecting rod; 17, third turntable; 18, contact block; 19, contact ring; 20, notch; 21, reciprocating screw; 22, base plate; 23, second motor; 24, push plate; 2 5. Rectangular groove; 26. Sliding block; 27. First magnetic strip; 28. U-shaped frame; 29. Second magnetic strip; 30. Discharge port; 31. Separation box; 32. Filter screen; 33. Drain duct; 34. Fixed plate; 35. Guide rod; 36. Press plate; 37. Reciprocating screw; 38. First bevel gear; 39. Nut block; 40. Second bevel gear; 41. Gas injection cylinder; 42. Piston plate; 43. Pipeline; 44. Tension spring; 45. Push rod; 46. Air guide tube; 47. Inclined plate. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] Example 1: Reference Figure 1 and Figure 2 , separation equipment, which is used in the field of magnetic separation, mainly includes a separation tank 1, one side of which is fixedly penetrated by a liquid inlet pipe 2 for injecting wastewater to be treated into the separation tank 1. On the side adjacent to the liquid inlet pipe 2, the separation tank 1 is also fixedly penetrated by a liquid outlet pipe 3 for discharging the treated wastewater.

[0043] Reference Figure 2 Within separation tank 1, a rotating roller 4 is positioned and rotatable about its axis. Multiple magnetic disks 5 are fixedly mounted on the outer wall of the rotating roller 4. These disks 5 are used to adsorb heavy metals and suspended solids within separation tank 1. To ensure that contaminants on the disks 5 are effectively scraped away, a scraper 8 is fixed within separation tank 1, located on the side of the disks 5 facing away from the liquid outlet pipe 3. The scraper 8 has a curved design and, in conjunction with the disks 5, effectively scrapes away any heavy metals and suspended solids adsorbed on them.

[0044] Reference Figure 2 In order to further improve the separation efficiency, two paddles 11 are respectively arranged on both sides of the magnetic disk 5. The two paddles 11 are used to push the wastewater in the separation tank 1 toward the magnetic disk 5, ensuring that the heavy metals and suspended pollutants in the wastewater can fully contact the magnetic disk 5 and be adsorbed.

[0045] Reference Figure 1-Figure 5A magnetic separation structure is installed on the side of the separation tank 1 away from the liquid inlet pipe 2. This structure includes a contact ring 19 fixed to the sidewall of the separation tank 1, with a notch 20 on one side. A rotating roller 4 rotates through the separation tank 1 and is fixed to a third turntable 17. Multiple contact blocks 18 are arranged in a ring on one side of the third turntable 17. These contact blocks 18 contact and cooperate with the contact ring 19 to power the magnetic disk 5 on and off. The magnetic disk 5 is composed of multiple sector-shaped magnetic plates 6 arranged in a ring and fixed to the outer wall of the rotating roller 4. When the contact blocks 18 come into contact with the contact ring 19, the corresponding sector-shaped magnetic plate 6 is energized and generates magnetism, thereby attracting heavy metals and suspended impurities in the wastewater. A scraper 8 is provided with multiple scraping grooves 9, into which the magnetic disk 5 extends. The scraper 8 and the scraping grooves 9 work together to scrape off heavy metals and suspended impurities adhering to the magnetic disk 5. When the contact block 18 enters the gap 20, it breaks contact with the contact ring 19, and the corresponding sector magnetic plate 6 is powered off. At this time, the sector magnetic plate 6 just moves into the scraping groove 9 of the scraper 8, and the scraper 8 scrapes off the heavy metals and suspended dirt.

[0046] Reference Figure 2 and Figure 3 In order to drive the paddle 11 to swing back and forth, a swinging structure is provided. This structure includes two fixed shafts 10 that rotate within the separation tank 1, and two paddles 11 are fixedly sleeved on the outer walls of the two fixed shafts 10. One end of each fixed shaft 10 rotates through one side of the separation tank 1 and is fixed with a first turntable 12. A first pin 13 is fixed to one side of the two first turntables 12 at a position offset from the center of the circle. A second turntable 14 is fixed to the end of the rotating roller 4 close to the first motor 7, and a second pin 15 is fixed to the side of the second turntable 14 offset from the center of the circle. One end of the two connecting rods 16 is respectively rotatably sleeved on the outer walls of the two first pins 13, and the other end is rotatably sleeved on the outer wall of the second pin 15. When the rotating roller 4 rotates, the second turntable 14 is synchronously driven to rotate. The second turntable 14 drives the two first turntables 12 to swing back and forth through the cooperation of the connecting rod 16, the first pin 13 and the second pin 15, thereby driving the paddle 11 to swing through the fixed shaft 10.

[0047] Reference Figure 2 、 Figure 6 and Figure 7In order to push the heavy metals and suspended dirt on the scraper 8 into the separation box 31, a pushing structure is provided. The specific implementation of the pushing structure is as follows: In the separation tank 1, a base plate 22 is fixed, and the base plate 22 is located on the side of the magnetic disk 5 away from the liquid outlet pipe 3. The side of the base plate 22 away from the magnetic disk 5 is rotatably connected to the reciprocating screw 21, and one end of the reciprocating screw 21 rotates and passes through one side of the separation tank 1. A push plate 24 is provided on the top of the scraper 8, and the two ends of the push plate 24 are respectively slidably matched with the inner walls on both sides of the separation tank 1 to ensure that the push plate 24 can move smoothly in the separation tank 1. A rectangular groove 25 is provided in the push plate 24, and a sliding block 26 is slidably connected in the rectangular groove 25, and the sliding block 26 is threadedly sleeved on the outer wall of the reciprocating screw 21. In this way, when the reciprocating screw 21 rotates, the push plate 24 can be driven to move on the top of the scraper 8 through the sliding block 26.

[0048] Reference Figure 1 、 Figure 2 、 Figure 6 and Figure 7 A second motor 23 is fixed to the top of the separation tank 1 via a frame. The output shaft of the second motor 23 is connected to the reciprocating screw 21 via a synchronous pulley and a synchronous belt, enabling the second motor 23 to drive the reciprocating screw 21. A first magnetic strip 27 is fixedly embedded in the top of the push plate 24. A U-shaped frame 28 is fixed to the top of the separation tank 1, and a second magnetic strip 29 is fixed to the top inner wall of the U-shaped frame 28. When the push plate 24 moves toward the rotating roller 4 to push material again, the second magnetic strip 29 generates a magnetic attraction force on the first magnetic strip 27, causing the push plate 24 to move upward, creating a gap between the push plate 24 and the scraper 8, allowing contaminants on the scraper 8 to flow to the right due to the inclined surface. When the push plate 24 moves to the right again, the magnetic attraction between the second magnetic strip 29 and the first magnetic strip 27 is released, and the push plate 24 contacts the top of the scraper 8 under the action of gravity, and the push plate 24 can push the contaminants into the separation box 31 again. A discharge port 30 located above the separation box 31 is provided on the side of the separation tank 1 away from the liquid outlet pipe 3 , and the push plate 24 cooperates with the discharge port 30 to discharge heavy metals and suspended dirt on the scraper 8 into the separation box 31 .

[0049] Reference Figure 2 、 Figure 7 and Figure 8On the side of the separation tank 1 away from the liquid outlet pipe 3, a solid-liquid separation structure is also provided. This structure is used to discharge the wastewater contained in the heavy metals and suspended dirt in the separation box 31. When the pushing structure is in operation, it can drive the solid-liquid separation structure to operate, thereby realizing the discharge of wastewater and the collection of solids. The specific implementation of the solid-liquid separation structure is as follows: a fixed plate 34 is fixed on one side of the separation tank 1, and two guide rods 35 are slidingly inserted into the fixed plate 34. The bottom ends of the two guide rods 35 are fixed with the same pressure plate 36. A filter screen 32 is fixed in the separation box 31 for placing heavy metals and suspended dirt. The pressure plate 36 cooperates with the filter screen 32 to squeeze out the water in the heavy metals and suspended dirt and discharge it to the outside through the drainage duct 33. A reciprocating screw 37 that passes through the fixed plate 34 is fixed to the top of the pressure plate 36. The outer wall thread sleeve of the reciprocating screw 37 is provided with a nut block 39. The outer wall fixed sleeve of the nut block 39 is provided with a first bevel gear 38, and the first bevel gear 38 rotates on the top of the fixed plate 34. A second bevel gear 40 is fixed to one end of the reciprocating screw 21 close to the reciprocating screw 37 , and the second bevel gear 40 is meshed with the first bevel gear 38 .

[0050] Specifically, when the reciprocating screw 21 rotates and drives the push plate 24 to push the contaminants into the separation box 31, the second bevel gear 40 cooperates with the first bevel gear 38 to drive the nut block 39 to rotate. The nut block 39 cooperates with the reciprocating screw 37 to drive the pressure plate 36 upward, facilitating the push plate 24 to push the contaminants into the separation box 31. When the push plate 24 moves toward the rotating roller 4, the reciprocating screw 37 drives the pressure plate 36 downward to squeeze the contaminants in the separation box 31, thereby squeezing out the water in the contaminants and discharging it to the outside through the drainage pipe 33. The water is then discharged to the separation tank 1 through an external water pump to repeat the magnetic separation.

[0051] Reference Figure 3 The radius of the first turntable 12 is greater than the diameter of the second turntable 14. This design allows the second turntable 14 to drive the first turntable 12 to reciprocate through a certain angle when the second turntable 14 rotates one circle. Specifically, the rotation of the second turntable 14 is connected to the first turntable 12 through a connecting rod or other mechanism. When the second turntable 14 rotates, the transmission action of the connecting rod 16 causes the first turntable 12 to reciprocate, thereby driving the magnetic disk 5 to reciprocate in the wastewater, thereby improving the efficiency of magnetic separation.

[0052] Reference Figure 2 Two inclined plates 47 are fixedly mounted on the bottom inner wall of the separation tank 1. The sides of these inclined plates 47, facing away from each other, are fixedly connected to the inner walls of the liquid inlet pipe 2. The liquid inlet pipe 2 is used to introduce wastewater into the separation tank 1. The two inclined plates 47 are located on either side of a rotating roller 4, which is equipped with a magnetic disk 5 for adsorbing heavy metal particles in the wastewater. The design of the inclined plates 47 ensures that as the wastewater flows through the separation tank 1, the sediment in the wastewater will converge in the center, facilitating magnetic separation by the magnetic disk 5.

[0053] Reference Figure 2 and Figure 7 The bottom of the separation box 31 is fixed with a drainage conduit 33, which is connected to an external water pump. When the sewage in the separation box 31 is treated, the water pump will discharge the sewage back into the separation tank 1 through the drainage conduit 33 for circulation treatment.

[0054] Through the design of the above structure, the heavy metal magnetic separation equipment for reducing wastewater can realize the recycling treatment of sewage, while improving the magnetic separation efficiency of sewage to achieve better treatment effect.

[0055] Example 2: Reference Figure 9 and Figure 10 This is an improvement on Example 1: To enhance the efficiency of magnetic separation of wastewater, an air injection cylinder 41 is further fixed to one side of the separation tank 1, located directly below the separation box 31. A piston plate 42 is sealingly and slidably connected to the interior of the air injection cylinder 41. Multiple tension springs 44 are fixed to the top of the piston plate 42, and the top ends of the tension springs 44 are fixedly connected to the top inner wall of the air injection cylinder 41. This way, when the piston plate 42 is moved downward by an external force, the tension springs 44 provide the elastic force to move the piston plate 42 upward and return it to its original position.

[0056] A push rod 45 is fixed to the top of the piston plate 42, and the top end of the push rod 45 slides through the bottom inner wall of the separation box 31 and the filter 32. When the pressure plate 36 moves down to squeeze the pollutants, it pushes the push rod 45 down, thereby driving the piston plate 42 to move down in the gas injection cylinder 41.

[0057] An air guide tube 46 is fixed to one side of the air injection cylinder 41, and one end of the air guide tube 46 passes through the inner wall of one side of the separation tank 1 and the inclined plate 47. When the piston plate 42 moves downward, the air in the air injection cylinder 41 is injected into the separation tank 1 through the air guide tube 46. The air will rush to the pollutants settled at the bottom, causing the settled pollutants to flow within the separation tank 1, thereby facilitating magnetic separation of the pollutants by the magnetic disk 5, thereby improving the magnetic separation efficiency of the wastewater.

[0058] In addition, to allow outside air to enter the gas injection cylinder 41 after the piston plate 42 moves downward, allowing the piston plate 42 to move upward and reset, a pipe 43 is fixedly inserted into the piston plate 42. At the same time, to control the direction of air flow, one-way valves are installed on the outer walls of the air guide pipe 46 and the pipe 43. Thus, when the piston plate 42 moves downward, the one-way valve of the air guide pipe 46 opens, allowing air to flow from the gas injection cylinder 41 to the separation tank 1; and when the piston plate 42 moves upward, the one-way valve of the pipe 43 opens, allowing outside air to enter the gas injection cylinder 41.

[0059] A method for using a magnetic separation device for reducing heavy metals in wastewater comprises the following steps:

[0060] S1. The sewage mixed with flocculant and magnetic seed is injected into the separation tank 1 through the liquid inlet pipe 2. The first motor 7 drives the rotating roller 4 and the magnetic disk 5 to rotate through the synchronous wheel and the synchronous belt. The magnetic disk 5 absorbs heavy metals, suspended matter and other pollutants in the sewage. When the magnetic disk 5 enters the scraping groove 9, the scraper 8 scrapes off the heavy metals, suspended matter and other pollutants attached to it. In addition, when the rotating roller 4 rotates, the sector magnetic plate 6 and the contact block 18 are synchronously driven to rotate, and the sector magnetic plate 6 and the contact block 18 correspond to each other. Since the contact block 18 When the contact block 18 enters the notch 20, the contact block 18 and the contact ring 19 are disengaged, and the corresponding sector-shaped magnetic plate 6 is powered on. The sector-shaped magnetic plate 6 can adsorb pollutants such as heavy metals and suspended matter in the separation tank 1. When the contact block 18 enters the notch 20, the contact block 18 and the contact ring 19 are disengaged, and the corresponding sector-shaped magnetic plate 6 is powered off. At this time, the sector-shaped magnetic plate 6 just moves into the scraping groove 9, and the heavy metals, suspended matter and other pollutants are scraped off by the scraper 8. Therefore, when scraping off the pollutants, the adsorption of the sector-shaped magnetic plate 6 on them is released, and the scraper 8 can effectively complete the scraping of the pollutants.

[0061] S2. When the rotating roller 4 rotates to perform magnetic separation, the rotating roller 4 synchronously drives the second turntable 14 to rotate. The second turntable 14 drives the first turntable 12 to swing back and forth through the cooperation of the connecting rod 16, the first pin 13 and the second pin 15 (the radius of the first turntable 12 is greater than the diameter of the second turntable 14). The first turntable 12 drives the paddle 11 to swing through the fixed shaft 10, which is used to push the sewage in the separation tank 1 toward the magnetic disk 5, so that the magnetic disk 5 can fully adsorb pollutants such as heavy metals and suspended matter in the separation tank 1, thereby improving the adsorption efficiency;

[0062] S3. After the scraper 8 scrapes off the pollutants, the second motor 23 drives the reciprocating screw 21 to rotate through the synchronous wheel and the synchronous belt. The reciprocating screw 21 drives the push plate 24 to move back and forth through the cooperation of the sliding block 26 and the push plate 24, and pushes the pollutants on the scraper 8 into the separation box 31 through the discharge port 30. When the push plate 24 moves toward the rotating roller 4 to push the material again, the second magnetic strip 29 generates a magnetic attraction force on the first magnetic strip 27, and the push plate 24 moves upward, so that a gap is generated between the push plate 24 and the scraper 8, so that the pollutants on the scraper 8 flow to the right under the action of the inclined surface. When the push plate 24 moves to the right again, the magnetic attraction between the second magnetic strip 29 and the first magnetic strip 27 is released, and the push plate 24 contacts the top of the scraper 8 under the action of gravity, and the push plate 24 can push the pollutants into the separation box 31 again.

[0063] S4, and when the reciprocating screw 21 rotates to drive the push plate 24 to push the pollutants into the separation box 31, the cooperation between the second bevel gear 40 and the first bevel gear 38 drives the nut block 39 to rotate, and the cooperation between the nut block 39 and the reciprocating screw 37 drives the pressure plate 36 to move upward, so that the push plate 24 can push the pollutants into the separation box 31. When the push plate 24 moves toward the rotating roller 4, the reciprocating screw 37 drives the pressure plate 36 to move downward to squeeze the pollutants in the separation box 31, so as to squeeze out the water in the pollutants and discharge it to the outside through the drainage pipe 33, and then discharge it to the separation tank 1 through the external water pump to repeat the magnetic separation;

[0064] S5. When the pressure plate 36 moves down to the separation box 31 to squeeze the pollutants, the pressure plate 36 pushes the piston plate 42 downward through the push rod 45. The piston plate 42 injects the air in the air injection cylinder 41 into the separation tank 1 through the air guide pipe 46, and flows towards the pollutants settled at the bottom, so that the settled pollutants flow in the separation tank 1, allowing the magnetic disk 5 to magnetically separate them, thereby improving the magnetic separation efficiency of sewage.

[0065] However, as is well known to those skilled in the art, the working principles and wiring methods of the second motor 23, the sector magnetic plate 6 and the first motor 7 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A magnetic separation device for reducing heavy metals in wastewater, characterized in that: It comprises a separation tank (1), wherein a liquid inlet pipe (2) for injecting wastewater is fixedly penetrated on one side of the separation tank (1), and a liquid outlet pipe (3) for discharging wastewater is fixedly penetrated on a side of the separation tank (1) adjacent to the liquid inlet pipe (2); It also includes a rotating roller (4) that rotates in the separation tank (1), and a plurality of magnetic disks (5) are fixedly sleeved on the outer wall of the rotating roller (4) for adsorbing heavy metals and suspended dirt in the separation tank (1). A scraper (8) is fixed in the separation tank (1), which is located on a side of the magnetic disk (5) away from the liquid outlet pipe (3), and the scraper (8) is bent. The scraper (8) cooperates with the magnetic disk (5) to scrape off the heavy metals and suspended dirt adsorbed on the magnetic disk (5); It also includes two paddles (11), which are respectively located on both sides of the magnetic disk (5) and are used to push the wastewater in the separation tank (1) toward the magnetic disk (5). A separation box (31) is welded on the side of the separation tank (1) away from the liquid outlet pipe (3) to hold the separated heavy metals and suspended dirt; A magnetic separation structure is provided on a side of the separation tank (1) away from the liquid inlet pipe (2), and is used to enable a scraper (8) to easily scrape off heavy metals and suspended dirt on a magnetic disk (5); the magnetic separation structure comprises a contact ring (19) fixed on a side of the separation tank (1) away from the liquid inlet pipe (2), a notch (20) being provided on one side of the contact ring (19), one end of the rotating roller (4) rotating through the separation tank (1) and fixed with a third turntable (17), a plurality of contact blocks (18) being arranged in a ring shape on a side of the third turntable (17) close to the separation tank (1), and the contact blocks (18) and the contact ring (19) being in contact with each other, a plurality of scraping grooves (9) being provided in the scraper (8), and the magnetic disk (5) extending into the scraping grooves (9), and the scraper (8) Cooperating with the scraping groove (9), the heavy metals and suspended dirt attached to the magnetic disk (5) are scraped off. The magnetic disk (5) is composed of a plurality of sector-shaped magnetic plates (6), and the plurality of sector-shaped magnetic plates (6) are arranged in a ring shape and fixed on the outer wall of the rotating roller (4). The plurality of sector-shaped magnetic plates (6) placed at the same angle cooperate with the corresponding contact blocks (18). The contact blocks (18) cooperate with the contact ring (19) to energize the sector-shaped magnetic plates (6). The other end of the rotating roller (4) rotates through the other side of the separation tank (1). The top of the separation tank (1) is away from the side of the third turntable (17) and is fixed with a first motor (7) through a frame. The output shaft of the first motor (7) is connected to the outer wall of the rotating roller (4) through a synchronous wheel and a synchronous belt transmission. A swing structure is provided in the separation tank (1) and is used to drive the two paddles (11) to swing back and forth, and the magnetic separation structure can drive the swing structure to operate; A pushing structure is provided in the separation tank (1) and is used for pushing heavy metals and suspended dirt on the scraper (8) into the separation box (31); the pushing structure comprises a base plate (22) fixed in the separation tank (1), and the base plate (22) is located on the side of the magnetic disk (5) away from the liquid outlet pipe (3), the side of the base plate (22) away from the magnetic disk (5) is rotatably connected to a reciprocating screw (21), and one end of the reciprocating screw (21) rotates and passes through one side of the separation tank (1), a pushing plate (24) is provided on the top of the scraper (8), and the two ends of the pushing plate (24) are respectively slidably matched with the inner walls of both sides of the separation tank (1), a rectangular groove (25) is provided in the pushing plate (24), a sliding block (26) is slidably connected in the rectangular groove (25), and the sliding block (26) is threadedly sleeved on the outer wall of the reciprocating screw (21), and the reciprocating screw (21) is slidably engaged with the inner walls of both sides of the separation tank (1), and a rectangular groove (25) is provided in the pushing plate (24), and a sliding block (26) is slidably connected in the rectangular groove (25), and the sliding block (26) is threadedly sleeved on the outer wall of the reciprocating screw (21), and the reciprocating screw (21) is slidably engaged with the inner walls of the separation tank (1). The block (26) drives the push plate (24) to move on the top of the scraper (8), the top of the separation tank (1) is fixed with a second motor (23) through a frame, the output shaft of the second motor (23) and the reciprocating screw (21) are connected through a synchronous wheel and a synchronous belt transmission, the top of the push plate (24) is fixed with a first magnetic strip (27), the top of the separation tank (1) is fixed with a U-shaped frame (28), the top inner wall of the U-shaped frame (28) is fixed with a second magnetic strip (29), and the magnetic force between the second magnetic strip (29) and the first magnetic strip (27) drives the push plate (24) to move upward, the side of the separation tank (1) away from the liquid outlet pipe (3) is provided with a discharge port (30) located above the separation box (31), and the push plate (24) cooperates with the discharge port (30) to discharge heavy metals and suspended dirt on the scraper (8) into the separation box (31); The solid-liquid separation structure is arranged on a side of the separation tank (1) away from the liquid outlet pipe (3) and is used to discharge wastewater contained in heavy metals and suspended pollutants in the separation box (31). When the pushing structure is in operation, it drives the solid-liquid separation structure to operate.

2. The heavy metal magnetic separation equipment for reducing wastewater according to claim 1, characterized in that: The swing structure includes two fixed shafts (10) rotating in the separation tank (1), two dial plates (11) are respectively fixedly sleeved on the outer walls of the two fixed shafts (10), one end of the two fixed shafts (10) rotates through one side of the separation tank (1) and is fixed with a first turntable (12), a first pin (13) is fixed at a position deviating from the center of the circle on one side of the two first turntables (12), and a connecting rod (16) is rotatably sleeved on the outer walls of the two first pins (13), a second turntable (14) is fixed on one end of the rotating roller (4) close to the first motor (7), a second pin (15) is fixed on the side of the second turntable (14) deviating from the center of the circle, and ends of the two connecting rods (16) close to each other are rotatably sleeved on the outer walls of the second pin (15), and the second turntable (14) drives the two first turntables (12) to swing back and forth through the connecting rod (16).

3. The heavy metal magnetic separation equipment for reducing wastewater according to claim 1, characterized in that: The solid-liquid separation structure includes a fixed plate (34) fixed to one side of the separation tank (1), two guide rods (35) slidingly penetrate the fixed plate (34), and the bottom ends of the two guide rods (35) are fixed with a same pressing plate (36). A filter screen (32) is fixed in the separation box (31) for placing heavy metals and suspended dirt, and the pressing plate (36) cooperates with the filter screen (32) to squeeze out water in the heavy metals and suspended dirt. The top of the pressing plate (36) is fixed with a filter screen (32) penetrating the fixed plate. The reciprocating screw (37) of the reciprocating screw (34) is provided with a nut block (39) on the outer wall thread sleeve of the reciprocating screw (37), and the outer wall fixed sleeve of the nut block (39) is provided with a first bevel gear (38), and the first bevel gear (38) rotates on the top of the fixed plate (34), and a second bevel gear (40) is fixed to one end of the reciprocating screw (21) close to the reciprocating screw (37), and the second bevel gear (40) is engaged with the first bevel gear (38) for driving the reciprocating screw (37) to move up and down.

4. The heavy metal magnetic separation equipment for reducing wastewater according to claim 2, characterized in that: The radius of the first rotating disk (12) is greater than the diameter of the second rotating disk (14).

5. The heavy metal magnetic separation equipment for reducing wastewater according to claim 3, characterized in that: A drainage conduit (33) is fixedly passed through the bottom of the separation box (31), and the drainage conduit (33) is connected to an external water pump for discharging the sewage squeezed out of the separation box (31) back into the separation tank (1).

6. The heavy metal magnetic separation equipment for reducing wastewater according to claim 2, characterized in that: Two inclined plates (47) are fixed to the inner wall of the bottom of the separation tank (1). The two inclined plates (47) are fixedly connected to the inner walls of the liquid inlet pipe (2) on the sides away from each other. The two inclined plates (47) are located on both sides of the rotating roller (4) and are used to make the sediment in the separation tank (1) converge to the center.

7. The heavy metal magnetic separation equipment for reducing wastewater according to claim 1, characterized in that: A gas injection cylinder (41) located just below the separation box (31) is fixed to one side of the separation pool (1). A piston plate (42) is sealed and slidably connected inside the gas injection cylinder (41). A plurality of tension springs (44) are fixed to the top of the piston plate (42). The top ends of the plurality of tension springs (44) are fixedly connected to the top inner wall of the gas injection cylinder (41) for moving the piston plate (42) upward and resetting. A push rod (45) is fixed to the top of the piston plate (42). The push rod (45) is fixed to the top of the piston plate (42). 5) is sealed and slides through the bottom inner wall of the separation box (31) and the filter (32), and the push rod (45) cooperates with the pressure plate (36) to drive the piston plate (42) to move downward. An air guide tube (46) is fixed to one side of the air injection cylinder (41), and one end of the air guide tube (46) passes through one side inner wall of the separation tank (1) and the inclined plate (47). The piston plate (42) cooperates with the air guide tube (46) to inject the air in the air injection cylinder (41) into the separation tank (1).

8. The heavy metal magnetic separation equipment for reducing wastewater according to claim 7, characterized in that: A pipe (43) is fixedly passed through the piston plate (42) for allowing external gas to enter the bottom of the piston plate (42). The outer walls of the air guide pipe (46) and the pipe (43) are both provided with one-way valves for controlling the flow direction of the air.

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