Magnetic separation equipment for reducing heavy metals in wastewater

Abstract

The invention belongs to the technical field of magnetic separation, particularly relates to magnetic separation equipment for reducing heavy metals in wastewater, and aims to solve the problems that pollutants such as heavy metals and suspended solids in other positions in a separation tank cannot be removed in the prior art, and the magnetism of a magnetic disk affects the scraping of the pollutants such as the heavy metals by a scraping strip. A liquid inlet pipe for injecting wastewater fixedly penetrates through one side of the separation tank, and a liquid outlet pipe for discharging wastewater fixedly penetrates through one side, adjacent to the liquid inlet pipe, of the separation tank; the device further comprises a rotating roller, the rotating roller rotates in the separation tank, and the outer wall of the rotating roller is fixedly sleeved with a plurality of magnetic discs. According to the device, pollutants such as heavy metal and suspended dirt in the separation tank can be fully adsorbed by the magnetic discs through reciprocating swing of the shifting plates, and when the pollutants such as heavy metal and suspended dirt on the fan-shaped magnetic plates are scraped by the scraping plates, the magnetic discs can be separated from the fan-shaped magnetic plates; and the fan-shaped magnetic plate is just powered off, so that the scraping plate can effectively scrape pollutants on the fan-shaped magnetic plate.

Description

Technical Field

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

[0002] Magnetic separation plays a pivotal role in wastewater treatment. With its high efficiency, environmental protection and strong adaptability, it has become an important part of modern wastewater treatment technology. By using the magnetic field to separate magnetic particles or magnetized substances in wastewater, magnetic separation technology can accurately remove pollutants such as heavy metals and suspended matter in wastewater, significantly improving the water quality of wastewater. In addition, magnetic separation technology also has the advantages of small footprint, low operating cost and easy automation control, making it widely used in industrial wastewater treatment, urban sewage treatment and other fields. With the continuous advancement and innovation of technology, magnetic separation technology will play a more important role in the field of wastewater treatment and make greater contributions to the protection of water resources and the ecological environment.

[0003] However, the prior art still has the following shortcomings when magnetically separating sewage: 1. During magnetic separation, the magnetic disk rotates at a fixed position for magnetic separation, so it is impossible to remove pollutants such as heavy metals and suspended matter in other positions in the separation tank, resulting in unsatisfactory magnetic separation efficiency; 2. When the magnetic disk is rotating for magnetic separation, heavy metals, suspended matter and other pollutants are always attached to the magnetic disk. The existing technology generally scrapes off the heavy metals, suspended matter and other pollutants through a scraper. However, the magnetic disk always produces magnetism to the heavy metals, suspended matter and other pollutants. Therefore, after the scraper scrapes them off, the heavy metals, suspended matter and other pollutants are still attached to the magnetic disk, affecting the subsequent magnetic separation operation of the magnetic disk.

[0004] In view of the above problems, the present invention document proposes a magnetic separation device for reducing heavy metals in wastewater. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the existing inability to 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 scraper bar, and to propose a heavy metal magnetic separation device for reducing wastewater.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A magnetic separation device for reducing heavy metals in wastewater, comprising a separation tank, a liquid inlet pipe for injecting wastewater is fixedly penetrated on one side of the separation tank, and a liquid outlet pipe for discharging wastewater is fixedly penetrated on one side of the separation tank adjacent to the liquid inlet pipe; It also includes a rotating roller, which rotates in the separation tank, and 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, which is located on the side of the magnetic disk away from the liquid outlet pipe, and the scraper is bent. The scraper cooperates with the magnetic disk to scrape off the heavy metals and suspended dirt adsorbed on the magnetic disk; It also includes two paddles, which are respectively 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 one side of the separation tank away from the liquid outlet pipe and is used to hold the separated heavy metals and suspended dirt. The magnetic separation structure is arranged on the side of the separation tank away from the liquid inlet pipe, and is used to enable the scraper to easily scrape off the heavy metals and suspended dirt on the magnetic disk; 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; The pushing structure is arranged in the separation tank and is used to push the heavy metals and suspended dirt on the scraper into the separation box; 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 operation of the pushing structure drives the solid-liquid separation structure to operate.

[0007] 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. A plurality of contact blocks are arranged in a ring shape on the side of the third turntable close to the separation tank, and the contact blocks are in contact 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, and the contact blocks cooperate with the contact ring to energize the sector-shaped magnetic plates. The other end of the rotating roller rotates The rotary drum is driven by a synchronous wheel and a synchronous belt to rotate; when the rotary drum 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, and the contact block contacts the contact ring to energize the corresponding sector magnetic plate, and the sector magnetic plate adsorbs pollutants such as heavy metals and suspended dirt. When the contact block enters the notch, the contact block is separated 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.

[0008] In a possible design, the swing structure includes two fixed shafts rotating in the separation tank, the two paddles 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, and a connecting rod is rotatably sleeved on the outer walls of the two first pins, a second turntable is fixed at one end of the rotating roller close to the first motor, a second pin is fixed on the side of the second turntable deviating from the center of the circle, and ends of the two connecting rods close to each other are rotatably sleeved on the outer wall of the second pin, and the second turntable drives the two first turntables to swing back and forth through the connecting rod; the rotating roller synchronously drives the second turntable to rotate, and the second turntable drives the first turntable to swing back and forth through the cooperation of the connecting rod, the first pin and the second pin, and the first turntable drives the paddle to swing through the fixed shaft, which is used 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.

[0009] In a possible design, the pushing structure includes a base plate fixed in the separation tank, and the base plate is located on a side of the magnetic disk away from the liquid outlet pipe, the side of the base plate away from the magnetic disk is rotatably connected to a reciprocating screw, and one end of the reciprocating screw rotates to penetrate one side of the separation tank, a push plate is provided on the top of the scraper, and the two ends of the push plate are respectively slidably matched with the inner walls of the two sides of the separation tank, a rectangular groove is provided in the push plate, a sliding block is slidably connected in the rectangular groove, and the sliding block is threadedly sleeved on the outer wall of the reciprocating screw, and the reciprocating screw drives the push plate to move on the top of the scraper through the sliding block, and the top of the separation tank is fixed with a second motor through a frame, and the output shaft of the second motor is connected to the reciprocating screw through a synchronous wheel and a synchronous belt transmission, the top of the push plate is fixedly embedded with a first magnetic strip, and the top of the separation tank is fixed with a U-shaped frame, and the top of the U-shaped frame 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; 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 to 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 side under the action of the inclined surface; when the push plate moves to the right side 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.

[0010] In a possible design, the solid-liquid separation structure includes a fixed plate fixed to one side of the separation tank, two guide rods are slidably penetrated in the fixed plate, the bottom ends of the two guide rods are fixed with the same pressing plate, a filter screen is fixed in the separation box for placing heavy metals and suspended dirt, and the pressing plate and the filter screen are used to squeeze out the water in the heavy metals and suspended dirt, a reciprocating screw penetrating the fixed plate is fixed to the top of the pressing plate, a nut block is provided on the outer wall thread sleeve of the reciprocating screw, a first bevel gear is provided on the outer wall fixed sleeve of the nut block, 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 between the second bevel gear and the first bevel gear drives the nut block to rotate, and the cooperation between the nut block and the reciprocating screw drives the pressure plate to move up, so that the push plate can push 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 to repeat the magnetic separation.

[0011] 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 reciprocate at a certain angle.

[0012] 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.

[0013] In a possible design, two inclined plates are fixed to the bottom inner wall of the separation tank, and the sides of the two inclined plates that are away from each other are fixedly connected to the inner walls of the two sides of the liquid inlet pipe respectively. The two inclined plates are located on both sides of the rotating roller to make the sediment in the separation tank converge to the middle.

[0014] In a possible design, an air injection cylinder located directly below the separation box is fixed on one side of the separation tank, and a piston plate is sealingly and slidably connected inside the air injection cylinder, and a plurality of tension springs are fixed on the top of the piston plate, and the top ends of the plurality of tension springs are fixedly connected to the top inner wall of the air injection cylinder, so as to make the piston plate move up and reset, and a push rod is fixed on the top of the piston plate, and the top end of the push rod seals and slides through the bottom inner wall and the filter screen of the separation box, 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, and one end of the air guide pipe penetrates one side inner wall and the inclined plate of the separation tank, 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 downward by 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 to 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.

[0015] 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, and a one-way valve is provided on the outer wall of the air guide pipe and the pipe to control the flow direction of the air.

[0016] Beneficial effects: 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 a 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 rings to 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 grooves, and the pollutants are scraped off by the scrapers, which can effectively complete the scraping of pollutants; In the present invention, the two paddles 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 rotating disk, a first pin is fixed at a position deviating from the center of one side of the two first rotating disks, a connecting rod is rotatably sleeved on the outer walls of the two first pins, a second pin is fixed on the side of the second rotating disk 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 rotating disk drives the first rotating disk and the paddle 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; In the present invention, a push plate is provided on the top of the scraper, 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, a first magnetic strip is fixedly embedded on the top of the push plate, and a second magnetic strip is fixed on 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, and pushes 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, and it is convenient for the push plate to continue to push the pollutants into the separation box in the later stage; In the present invention, a piston plate is sealingly and slidably connected inside 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 an inner wall of one side of the separation tank and an 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 flows towards the pollutants deposited at the bottom, so that the deposited pollutants flow in the separation tank, so that the magnetic disk can perform magnetic separation on them, thereby improving the magnetic separation efficiency of sewage.

[0017] In the present invention, the reciprocating swing of the paddle plate enables the magnetic disk to fully absorb 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 fan-shaped magnetic plate, the fan-shaped magnetic plate is just powered off, so that the scraper can effectively scrape off the pollutants on the fan-shaped magnetic plate. In addition, the pollutants can be automatically discharged and the sewage contained therein can be squeezed out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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; Figure 2 A schematic cross-sectional view of a heavy metal magnetic separation device for reducing wastewater provided in Example 1 of the present invention; Figure 3 A schematic diagram of a three-dimensional exploded structure of a first rotating disk, a second rotating disk and a first motor of a heavy metal magnetic separation device for reducing wastewater provided in Example 1 of the present invention; Figure 4 A schematic diagram of a three-dimensional exploded structure of a sector-shaped magnetic plate and a scraper of a heavy metal magnetic separation device for reducing wastewater provided in Example 1 of the present invention; Figure 5 A schematic diagram of a three-dimensional explosion structure of a contact block and a contact ring of a heavy metal magnetic separation device for reducing wastewater provided in Example 1 of the present invention; Figure 6A schematic diagram of a three-dimensional exploded structure of a scraper, a push plate and a U-shaped frame of a heavy metal magnetic separation device for reducing wastewater provided in Example 1 of the present invention; Figure 7 A schematic diagram of a three-dimensional exploded structure of a separation box, a filter screen and a pressing plate of a magnetic separation device for reducing heavy metals in wastewater provided in Example 1 of the present invention; 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 heavy metal magnetic separation device for reducing wastewater provided in Example 1 of the present invention; Fig. 9 A schematic cross-sectional view of a heavy metal magnetic separation device for reducing wastewater provided in Example 2 of the present invention; Fig.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.

[0019] In the figure: 1, separation tank; 2, liquid inlet pipe; 3, liquid outlet pipe; 4, rotating roller; 5, magnetic disk; 6, fan-shaped 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 rod; 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

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0021] Example 1: Reference Figure 1 and Figure 2 , a separation device, which is used in the field of magnetic separation, mainly comprises a separation tank 1, one side of which is fixedly penetrated by a liquid inlet pipe 2, which is used to inject the 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, which is used to discharge the treated wastewater.

[0022] Reference Figure 2 In the separation tank 1, a rotating roller 4 is arranged and can rotate around its axis. A plurality of magnetic disks 5 are fixedly sleeved on the outer wall of the rotating roller 4, and these magnetic disks 5 are used to adsorb heavy metals and suspended dirt in the separation tank 1. In order to ensure that the pollutants on the magnetic disks 5 can be effectively scraped off, a scraper 8 is fixed in the separation tank 1, and it is located on the side of the magnetic disks 5 away from the liquid outlet pipe 3. The scraper 8 is designed in a bent shape, and cooperates with the magnetic disks 5 to effectively scrape off the heavy metals and suspended dirt adsorbed on the magnetic disks 5.

[0023] 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.

[0024] Reference Figure 1-Figure 5 A magnetic separation structure is provided on the side of the separation tank 1 away from the liquid inlet pipe 2. The structure includes a contact ring 19 fixed on the side wall of the separation tank 1, and a notch 20 is provided on one side of the contact ring 19. One end of the rotating roller 4 rotates through the separation tank 1 and is fixed with a third rotating disk 17, and a plurality of contact blocks 18 are arranged in a ring shape on one side of the third rotating disk 17. These contact blocks 18 contact and cooperate with the contact ring 19 to power on and off the magnetic disk 5. The magnetic disk 5 is composed of a plurality of sector-shaped magnetic plates 6, which are arranged in a ring shape and fixed on the outer wall of the rotating roller 4. When the contact blocks 18 contact the contact ring 19, the corresponding sector-shaped magnetic plates 6 are energized and generate magnetism, thereby adsorbing heavy metals and suspended dirt in the wastewater. A plurality of scraping grooves 9 are provided in the scraper 8, and the magnetic disk 5 extends into the scraping grooves 9. The scraper 8 cooperates with the scraping grooves 9 to scrape off the heavy metals and suspended dirt attached to the magnetic disk 5. When the contact block 18 enters the notch 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.

[0025] Reference Figure 2 and Figure 3In order to drive the paddle 11 to swing back and forth, a swinging structure is provided. The structure includes two fixed shafts 10 rotating in the separation tank 1, and the two paddles 11 are 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. 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 deviating 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, and then drives the paddle 11 to swing through the fixed shaft 10.

[0026] Reference Figure 2 , Figure 6 and Figure 7 In 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 penetrates 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.

[0027] Reference Figure 1 , Figure 2 , Figure 6 and Figure 7, the top of the separation tank 1 is fixed with a second motor 23 through a frame, and the output shaft of the second motor 23 is connected to the reciprocating screw 21 through a synchronous wheel and a synchronous belt transmission, so that the second motor 23 drives the reciprocating screw 21. The top of the push plate 24 is fixedly embedded with a first magnetic strip 27, and the top of the separation tank 1 is fixed with a U-shaped frame 28, and the top inner wall of the U-shaped frame 28 is fixed with a second magnetic strip 29. 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 can flow to the right side under the action of the inclined surface. When the push plate 24 moves to the right side 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. A discharge port 30 located above the separation box 31 is provided on the side of the separation tank 1 away from the liquid discharge 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 .

[0028] Reference Figure 2 , Figure 7 and Figure 8 , a solid-liquid separation structure is also provided on the side of the separation tank 1 away from the liquid outlet pipe 3. This structure is used to discharge the wastewater contained in the heavy metals and suspended dirt in the separation box 31. When the pusher structure is in operation, the solid-liquid separation structure can be driven to operate to achieve 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 slidably penetrated in the fixed plate 34, and the bottom ends of the two guide rods 35 are fixed with the same pressing plate 36. A filter screen 32 is fixed in the separation box 31 for placing heavy metals and suspended dirt. The pressing 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 conduit 33. A reciprocating screw 37 that penetrates the fixed plate 34 is fixed on the top of the pressing plate 36, and a nut block 39 is provided on the outer wall thread sleeve of the reciprocating screw 37, and a first bevel gear 38 is provided on the outer wall fixed sleeve of the nut block 39, 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 rod 21 close to the reciprocating screw rod 37 , and the second bevel gear 40 is meshed with the first bevel gear 38 .

[0029] Specifically, 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 conduit 33, and then discharge it to the separation tank 1 through the external water pump to repeat the magnetic separation.

[0030] Reference Figure 3 The radius of the first turntable 12 is greater than the diameter of the second turntable 14. This design is to enable the second turntable 14 to drive the first turntable 12 to swing back and forth at 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 and other mechanisms. When the second turntable 14 rotates, the first turntable 12 swings back and forth through the transmission action of the connecting rod 16, thereby driving the magnetic disk 5 to move back and forth in the wastewater, thereby improving the efficiency of magnetic separation.

[0031] Reference Figure 2 Two inclined plates 47 are fixedly installed on the inner wall of the bottom of the separation tank 1, and the two inclined plates 47 are fixedly connected to the inner walls of the two sides of the liquid inlet pipe 2 on the sides away from each other. The liquid inlet pipe 2 is used to introduce wastewater into the separation tank 1. The two inclined plates 47 are located on both sides of the rotating roller 4, and the rotating roller 4 is provided with a magnetic disk 5 for adsorbing heavy metal particles in the wastewater. The design of the inclined plates 47 makes it possible for the sediment in the wastewater to converge to the middle when the wastewater flows in the separation tank 1, so that the magnetic disk 5 can perform magnetic separation.

[0032] Reference Figure 2 and Figure 7 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. 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.

[0033] Through the design of the above structure, the heavy metal magnetic separation equipment in the reduced wastewater can realize the recycling treatment of sewage, while improving the magnetic separation efficiency of sewage to achieve better treatment effect.

[0034] Example 2: Reference Fig. 9 and Fig.10, based on the improvement of Example 1: In order to improve the magnetic separation efficiency of sewage, a gas injection cylinder 41 is fixed on one side of the separation tank 1, and the gas injection cylinder 41 is located directly below the separation box 31. A piston plate 42 is sealed and slidably connected inside the gas injection cylinder 41, and a plurality of tension springs 44 are fixed on the top of the piston plate 42, and the top of the tension spring 44 is fixedly connected to the top inner wall of the gas injection cylinder 41. In this way, when the piston plate 42 is moved downward by an external force, the tension spring 44 will provide elastic force to move the piston plate 42 upward and reset.

[0035] A push rod 45 is also fixed to the top of the piston plate 42, and the top of the push rod 45 seals and slides through the bottom inner wall of the separation box 31 and the filter screen 32. When the pressure plate 36 moves down to squeeze the pollutants, it will push the push rod 45 down, thereby driving the piston plate 42 to move down in the gas injection cylinder 41.

[0036] 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 penetrates 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 will be injected into the separation tank 1 through the air guide tube 46, and the air will rush to the pollutants settled at the bottom, so that the settled pollutants flow in the separation tank 1, thereby facilitating the magnetic separation of the magnetic disk 5, thereby improving the magnetic separation efficiency of the sewage.

[0037] In addition, in order to allow external gas to enter the gas injection cylinder 41 after the piston plate 42 moves down, so that the piston plate 42 can move up and reset, a pipe 43 is fixedly passed through the piston plate 42. At the same time, in order to control the flow direction of air, the outer walls of the air guide pipe 46 and the pipe 43 are both provided with a one-way valve. In this way, when the piston plate 42 moves down, 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 up, the one-way valve of the pipe 43 opens, allowing external air to enter the gas injection cylinder 41.

[0038] A method for using a magnetic separation device for reducing heavy metals in wastewater comprises the following steps: S1. Inject the mixed flocculant and the sewage with magnetic seeds 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 the heavy metals, suspended matter and other pollutants in the sewage. When the magnetic disk 5 enters the scraping groove 9, the heavy metals, suspended matter and other pollutants attached to it are scraped off by the scraper 8. 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 The contact ring 19 contacts the corresponding sector magnetic plate 6, which is energized to 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 separated from each other, 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, 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 magnetic plate 6 on them is released, so that the scraper 8 can effectively complete the scraping of the pollutants. S2. When the rotating roller 4 rotates to perform magnetic separation, the rotating roller 4 synchronously drives the second rotating disk 14 to rotate, and the second rotating disk 14 drives the first rotating disk 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 rotating disk 12 is greater than the diameter of the second rotating disk 14), and the first rotating disk 12 drives the paddle 11 to swing through the fixed shaft 10, so as to push the sewage in the separation tank 1 toward the magnetic disk 5, so that the magnetic disk 5 can fully adsorb the heavy metals, suspended matter and other pollutants in the separation tank 1, thereby improving the adsorption efficiency; 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 to the first magnetic strip 27, and the push plate 24 moves up, 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 side under the action of the inclined surface. When the push plate 24 moves to the right side 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. 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 pushes 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 conduit 33, and discharge it to the separation tank 1 through the external water pump to repeat the magnetic separation; 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 toward 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.

[0039] However, as is well known to those skilled in the art, the working principles and wiring methods of the second motor 23, the fan-shaped 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 may make any optional selections according to their needs or convenience.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heavy metal magnetic separation device for reducing 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 one side of the separation tank (1) adjacent to the liquid inlet pipe (2); It also includes a rotating roller (4) which rotates in the separation tank (1); 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) and is located on a side of the magnetic disk (5) away from the liquid outlet pipe (3); the scraper (8) is bent, and 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 push plates (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) and is used to contain the separated heavy metals and suspended dirt; A magnetic separation structure is arranged 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 the magnetic disk (5); A swing structure is arranged 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, disposed in the separation tank (1), for pushing 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 containing 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 device for reducing wastewater according to claim 1, characterized in that: The magnetic separation structure comprises a contact ring (19) fixed to 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) rotatingly passes through the separation tank (1) and is fixed with a third rotating disk (17), a plurality of contact blocks (18) being arranged in a ring shape on a side of the third rotating disk (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), the scraper (8) and the scraping grooves (9) cooperating to scrape off heavy metals and suspended dirt attached to the magnetic disk (5), 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 corresponding contact blocks (18), and the contact blocks (18) cooperate with the contact rings (19) to energize the sector-shaped magnetic plates (6). The other end of the rotating roller (4) rotates and passes through the other side of the separation tank (1). A first motor (7) is fixed to the top of the separation tank (1) away from the third turntable (17) through a frame, and 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.

3. The heavy metal magnetic separation device for reducing wastewater according to claim 2, characterized in that: The swing structure comprises two fixed shafts (10) rotating in the separation tank (1); the 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 rotating disk (12); a first pin (13) is fixed at a position deviating from the center of the circle on one side of the two first rotating disks (12); a connecting rod (16) is rotatably sleeved on the outer walls of the two first pins (13); a second rotating disk (14) is fixed at one end of the rotating roller (4) close to the first motor (7); a second pin (15) is fixed at one side of the second rotating disk (14) deviating from the center of the circle; 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 rotating disk (14) drives the two first rotating disks (12) to swing back and forth through the connecting rod (16).

4. The heavy metal magnetic separation device for reducing wastewater according to claim 1, characterized in that: The pusher structure comprises a base plate (22) fixed in the separation tank (1), and the base plate (22) is located on a side of the magnetic disk (5) away from the liquid outlet pipe (3), and 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 through one side of the separation tank (1), and 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 of the two sides of the separation tank (1), and 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), and the reciprocating screw (21) drives the push plate (24) to move on the top of the scraper (8) through the sliding block (26). A second motor (23) is fixed to the top of the separation tank (1) through a frame, and the output shaft of the second motor (23) is connected to the reciprocating screw (21) through a synchronous wheel and a synchronous belt transmission. A first magnetic strip (27) is fixedly embedded on 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 inner wall of the top of the U-shaped frame (28). The magnetic force between the second magnetic strip (29) and the first magnetic strip (27) drives the push plate (24) to move upward. A discharge port (30) located above the separation box (31) is provided on a side of the separation tank (1) away from the liquid discharge 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).

5. The heavy metal magnetic separation device for reducing wastewater according to claim 4, characterized in that: The solid-liquid separation structure comprises a fixed plate (34) fixed to one side of the separation tank (1), two guide rods (35) slidingly penetrated in the fixed plate (34), 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, and a pressure plate (36) penetrating the fixed plate is fixed at the top end of the pressing plate (36). A reciprocating screw (37) is provided with a nut block (39) on the outer wall of the reciprocating screw (37), a first bevel gear (38) is provided on the outer wall of the nut block (39), 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) for driving the reciprocating screw (37) to move up and down.

6. The heavy metal magnetic separation equipment for reducing wastewater according to claim 3, characterized in that: The radius of the first rotating disk (12) is greater than the diameter of the second rotating disk (14).

7. The heavy metal magnetic separation device for reducing wastewater according to claim 5, 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 and is used to discharge the sewage squeezed out of the separation box (31) back into the separation tank (1).

8. The heavy metal magnetic separation equipment for reducing wastewater according to claim 3, 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 middle.

9. The heavy metal magnetic separation device for reducing wastewater according to claim 1, characterized in that: A gas injection cylinder (41) located directly below the separation box (31) is fixed to one side of the separation pool (1); a piston plate (42) is sealingly 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) 5) is sealed and slidably penetrates the bottom inner wall of the separation box (31) and the filter screen (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) penetrates the inner wall of one side 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).

10. The heavy metal magnetic separation device for reducing wastewater according to claim 9, characterized in that: A pipe (43) is fixedly inserted into the piston plate (42) for allowing external gas to enter the lower part 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.

Images