A multi-stage wastewater purification device for washing plastic granules

Abstract

This invention provides a multi-stage wastewater purification device for washing plastic granules, relating to the field of purification technology. It includes a tank with a purification mechanism inside. The purification mechanism includes a fixed plate, a fixed frame fixedly connected to the outer surface of the fixed plate, a rotating disk rotatably connected to the inner surface of the fixed frame via bearings, a magnet fixedly connected to the inner surface of the rotating disk, and a limit rail fixedly connected to the outer surface of the fixed frame. In this invention, a coil reciprocates in a magnetic field, cutting magnetic lines of force and forming an electrolytic reaction involving anodic oxidation to decompose organic matter and cathodic reduction of heavy metal ions. Due to the pulsed current characteristics, the gas film and sediment buildup on the electrode plate surface are significantly reduced, maintaining high reactivity and achieving electrolytic oxidation-reduction purification. This significantly improves the removal rate of heavy metal ions, surfactants, and organic matter in wastewater, increasing efficiency compared to single-treatment methods, reducing electrode maintenance costs, and extending equipment lifespan.

Description

Technical Field

[0001] This invention relates to the field of purification technology, and in particular to a multi-stage wastewater purification device for washing plastic particles. Background Technology

[0002] In plastic production, heavy metal compounds such as lead, cadmium, and zinc are used as heat stabilizers. The presence of heavy metal-containing waste products and industrial dust adsorbed on surfaces during plastic recycling poses a significant challenge to the treatment process in plastic particle cleaning. Conventional electrolytic methods for treating plastic cleaning wastewater containing heavy metal ions and organic matter are prone to problems. The electrode surface is susceptible to gas film formation due to continuous oxygen and hydrogen evolution, and the accumulation of metal hydroxide deposits leads to electrode passivation, requiring frequent maintenance. A single stirring method is insufficient to create a three-dimensional water flow, resulting in inadequate contact between pollutants and the electrode plates and magnetic adsorption components, especially in high-concentration areas where treatment blind spots may occur. This results in high levels of heavy metal ions and surfactant residues, failing to meet the requirements for deep purification. The large number of bubbles generated during electrolysis easily accumulate and overflow on the liquid surface, interfering with subsequent processes. Furthermore, the accumulation of foam and impurities on the electrode surface further hinders the electrolysis reaction, leading to a decrease in treatment efficiency. Traditional heating sterilization relies on external heat sources, resulting in high energy consumption and slow heating, making it difficult to effectively inactivate microorganisms in wastewater that have become more resistant due to the presence of metal pollutants. A single treatment process cannot simultaneously achieve heavy metal removal, organic matter decomposition, and sterilization, leading to easy exceedances of effluent microbial indicators and high risks of reuse or discharge. Therefore, we propose a multi-stage wastewater purification device for plastic particle washing. Summary of the Invention

[0003] The purpose of this invention is to solve the above-mentioned problems by providing a multi-stage wastewater purification device for washing plastic particles.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage wastewater purification device for washing plastic particles, comprising a tank, wherein a purification mechanism is provided inside the tank, the purification mechanism includes a fixed plate, a fixed frame is fixedly connected to the outer surface of the fixed plate, a rotating disk is rotatably connected to the inner surface of the fixed frame via a bearing, a magnet is fixedly connected to the inner surface of the rotating disk, a limit rail is fixedly connected to the outer surface of the fixed frame, a sliding frame is slidably connected to the inner surface of the limit rail, a coil is fixedly connected to the outer surface of the sliding frame, a through hole for the coil to pass through is provided on the outer surface of the fixed frame, a support plate is fixedly connected to the inner surface of the tank, two telescopic rods are fixedly connected to the upper surface of the support plate, and an electrode plate is fixedly connected to the output ends of the two telescopic rods.

[0005] Preferably, the tank body is further provided with a stirring mechanism, which includes a rotating frame. A support rod is fixedly connected to the lower surface of the rotating frame, and multiple stirring blades are fixedly connected to the outer surface of the support rod. A straight groove is formed on the upper surface of the rotating frame. A rotating rod is rotatably connected to the upper surface of the fixed frame through a bearing. A first rotating plate is fixedly connected to the outer surface of the rotating rod. A second rotating plate is rotatably connected to the outer surface of the first rotating plate through a bearing. A connecting rod is fixedly connected to the lower surface of the second rotating plate. A third rotating plate is fixedly connected to the lower surface of the connecting rod. A slider is rotatably connected to the lower surface of the other end of the third rotating plate through a bearing. The slider is slidably connected to the straight groove.

[0006] Preferably, the connecting rod passes through the sliding frame and is rotatably connected to the sliding frame, and the support rod passes through the electrode plate and is rotatably connected to the electrode plate.

[0007] Preferably, the interior of the tank is further provided with a defoaming mechanism, which includes a fourth rotating plate. The fourth rotating plate is rotatably connected to the slider via a bearing. A fixing rod is fixedly connected to the lower surface of the other end of the fourth rotating plate. A roller is rotatably connected to the outer surface of the fixing rod via a bearing. A curved groove is formed on the lower surface of the rotating frame. The roller is slidably connected to the curved groove. A defoaming frame is fixedly connected to the lower surface of the fixing rod. Multiple defoaming rods are fixedly connected to the lower surface of the defoaming frame.

[0008] Preferably, the tank body is further provided with a circulating heating mechanism, which includes a heat-conducting ring. Multiple heat-conducting wires are installed on the lower surface of the heat-conducting ring. A positioning plate is fixedly connected to the inner surface of the tank body. A transport pipe is fixedly connected to the center of the positioning plate. A rubber membrane is provided on the inner surface of the transport pipe. A water inlet pipe and a water delivery pipe are respectively connected to both sides of the transport pipe. A through hole for connecting the water inlet pipe and the water delivery pipe is opened on the surface of the positioning plate. A sewage inlet pipe, a drain pipe, a sewage discharge pipe, and an exhaust pipe are connected to the outer surface of the tank body.

[0009] Preferably, the outer surface of the support plate is rotatably connected to a mounting rod via a bearing, the lower surface of the mounting rod is fixedly connected to a fifth rotating plate, the lower surface of the other end of the fifth rotating plate is rotatably connected to an operating rod, the other end of the operating rod is rotatably connected to a lifting plate, and the lifting plate is slidably connected to the transport pipeline.

[0010] Preferably, a heat-conducting sheet is fixedly connected to the inner surface of the fixing frame, a heat-conducting rod is provided on the lower surface of the heat-conducting sheet, a heat-insulating sleeve is sleeved on the outer surface of the heat-conducting rod, the heat-insulating sleeve is fixedly connected between the fixing plate and the support plate, the heat-conducting rod is fixedly connected to a heat-conducting ring, and the heat-conducting ring is fixedly connected to the lower surface of the support plate.

[0011] Preferably, the rotating frame is rotatably connected to the fixed plate via a bearing, and the fixed plate is fixedly connected to the tank body.

[0012] Preferably, a dual-head motor is mounted on the upper surface of the fixing plate, and the two output ends of the dual-head motor are fixedly connected to the rotating disk and the mounting rod, respectively.

[0013] Preferably, a geared motor is fixedly connected to the inner surface of the fixed frame, and the upper surface of the geared motor is fixedly connected to the rotating rod.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0015] 1. This invention proposes a multi-stage wastewater purification device for washing plastic particles. The magnets on the inner surface of the rotating disk rotate, generating a changing magnetic field. This magnetic field is driven by the first and second rotating plates, which in turn drive the connecting rod to move, causing the sliding frame to move linearly along the limiting rail. The coil reciprocates in the magnetic field, cutting the magnetic lines of force and generating an induced current. This forms an electrolytic reaction that decomposes organic matter through anodic oxidation and reduces heavy metal ions through cathodic reduction. Due to the pulsed current characteristics, the gas film and sediment buildup on the electrode plate surface are significantly reduced, maintaining high reactivity and achieving electrolytic oxidation-reduction purification. This significantly improves the removal rate of heavy metal ions, surfactants, and organic matter in wastewater. Compared with single treatment methods, this method is more efficient, reduces electrode maintenance costs, and extends the service life of the equipment.

[0016] 2. This invention proposes a multi-stage wastewater purification device for washing plastic particles. A geared motor within the fixed frame continuously drives a rotating rod. Through the linkage of the first rotating plate, the second rotating plate, and the connecting rod, the slider at the lower end of the third rotating plate slides within the straight groove of the rotating frame, thereby causing the rotating frame to rotate around the fixed plate. The support rod and stirring blades on the lower surface of the rotating frame agitate the wastewater, forming a three-dimensional water flow. This enhances the contact frequency and uniformity between pollutants and purification components such as electrode plates and magnets, accelerates the electrolysis reaction rate, improves the overall purification effect, effectively avoids insufficient treatment due to excessively high local concentrations, and ensures stable and efficient purification.

[0017] 3. This invention proposes a multi-stage wastewater purification device for washing plastic granules. When the stirring mechanism is running, the slider drives the fourth rotating plate connected to it to move. The roller on the fixed rod at the lower end of the fourth rotating plate slides within the curved groove on the lower surface of the rotating frame, causing the defoaming frame to move along the straight groove and swing, breaking up the bubbles accumulated at the top of the tank. At the same time, when the rubber defoaming rod on the lower surface of the defoaming frame passes the electrode plate, it knocks off the foam and impurities on the electrode surface by tapping, which not only prevents bubbles from overflowing and interfering with the processing process, but also effectively cleans the deposits on the electrode plate surface, avoiding the decrease in electrode reaction efficiency caused by the accumulation of foam and impurities, ensuring the continuous and stable operation of the electrode, and reducing the risk of equipment failure.

[0018] 4. This invention proposes a multi-stage wastewater purification device for washing plastic granules. The output shaft of the other end of the dual-head motor drives the mounting rod to rotate. Through the fifth rotating plate and the operating rod, the lifting plate reciprocates in the tank, forming a cavity negative pressure with the rubber membrane to drive wastewater circulation. At the same time, the heat-conducting plate on the inner surface of the fixed frame cuts the magnetic lines of force under the high-speed rotation of the magnet, generating eddy currents and heating. The heat is transferred to the wastewater through the heat-conducting rod and heat-conducting ring, raising the water temperature to achieve high-temperature sterilization. It utilizes electromagnetic induction to generate heat on its own, eliminating the need for additional heating equipment, saving energy and reducing consumption. High-temperature sterilization effectively inactivates harmful microorganisms in the wastewater, reducing the risk of secondary pollution. In conjunction with the purification, stirring, and defoaming mechanisms, it achieves integrated treatment of pollutant removal and sterilization, enabling the effluent water quality to reach higher standards and meet reuse or strict discharge requirements. Attached Figure Description

[0019] Figure 1 This invention provides a front view of a multi-stage wastewater purification device for washing plastic particles.

[0020] Figure 2 This invention provides a cross-sectional structural schematic diagram of a multi-stage wastewater purification device for washing plastic particles.

[0021] Figure 3 This invention provides a partial cross-sectional view of the heat insulation sleeve of a multi-stage wastewater purification device for washing plastic particles.

[0022] Figure 4 This invention provides a schematic diagram of the internal structure of a multi-stage wastewater purification device for washing plastic particles.

[0023] Figure 5 This invention provides a partial structural diagram of a heat-conducting sheet in a multi-stage wastewater purification device for washing plastic particles.

[0024] Figure 6 This invention provides a partial structural diagram of the third rotating plate in a multi-stage wastewater purification device for washing plastic particles.

[0025] Figure 7 This invention presents a partial structural diagram of a curved trough in a multi-stage wastewater purification device for washing plastic particles.

[0026] Legend: 1. Tank; 2. Purification mechanism; 201. Fixing plate; 202. Fixing frame; 203. Rotating disc; 204. Magnet; 205. Limiting rail; 206. Sliding frame; 207. Coil; 208. Support plate; 209. Telescopic rod; 210. Electrode plate; 3. Stirring mechanism; 301. Rotating frame; 302. Support rod; 303. Stirring blade; 304. Straight groove; 305. Rotating rod; 306. First rotating plate; 307. Second rotating plate; 308. Connecting rod; 309. Third rotating plate; 310. Sliding block; 4. Defoaming mechanism; 401. Fourth rotating plate; 402. 1. Fixed rod; 403. Roller; 404. Curved groove; 405. Defoaming rack; 406. Defoaming rod; 5. Circulating heating mechanism; 501. Heat-conducting ring; 502. Heat-conducting wire; 504. Positioning plate; 505. Transport pipe; 506. Rubber membrane; 507. Water inlet pipe; 508. Water delivery pipe; 509. Through hole; 510. Sewage inlet pipe; 511. Drainage pipe; 512. Sewage discharge pipe; 513. Exhaust pipe; 6. Fifth rotating plate; 7. Operating rod; 8. Lifting plate; 9. Heat-conducting sheet; 10. Heat-conducting rod; 11. Double-headed motor; 12. Gear motor; 13. Mounting rod; 14. Heat insulation sleeve. Detailed Implementation

[0027] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0029] like Figures 1-7 As shown, a multi-stage wastewater purification device for washing plastic particles includes a tank 1. A purification mechanism 2 is installed inside the tank 1. The purification mechanism 2 includes a fixed plate 201. A fixed frame 202 is fixedly connected to the outer surface of the fixed plate 201. A rotating disk 203 is rotatably connected to the inner surface of the fixed frame 202 via a bearing. A magnet 204 is fixedly connected to the inner surface of the rotating disk 203. A limiting rail 205 is fixedly connected to the outer surface of the fixed frame 202. A sliding frame 206 is slidably connected to the inner surface of the limiting rail 205. A coil 207 is fixedly connected to the outer surface of the sliding frame 206. A through hole for the coil 207 to pass through is opened on the outer surface of the fixed frame 202. A support plate 208 is fixedly connected to the inner surface of the tank 1. Two telescopic rods 209 are fixedly connected to the upper surface of the support plate 208. An electrode plate 210 is fixedly connected to the output end of the two telescopic rods 209.

[0030] The effect is that the magnet 204 on the inner surface of the rotating disk 203 rotates accordingly, generating a changing magnetic field. The sliding frame 206 moves linearly along the limiting rail 205. At this time, the connecting rod 308 can drive the sliding frame 206 to slide within the limiting rail 205, thereby causing the coil 207 to reciprocate in the changing magnetic field, alternately cutting the magnetic field lines. When the coil 207 cuts the magnetic field lines, an induced current is generated according to the principle of electromagnetic induction. The current is output in the form of pulses. The pulsed current is output to the two electrode plates 210, making one electrode plate 210 positively charged as the anode and the other negatively charged as the cathode, thus initiating the electrolysis reaction. An oxidation reaction occurs at the anode, decomposing the pollutants in the wastewater. Organic matter and the cathode promote the reduction and precipitation of heavy metal ions, achieving preliminary purification of pollutants in wastewater. Since the coil 207 generates a pulsed current, a large number of bubbles will not be continuously generated on the surface of the electrode plate 210. During the current conduction stage, the electrode undergoes an electrochemical reaction to generate a small number of bubbles. During the current disconnection stage, the bubbles have time to detach from the electrode surface, effectively reducing the formation of gas film on the electrode surface. At the same time, the pulsed charging ensures that the precipitates such as metal hydroxides generated during the electrolysis process will not continuously adhere to the electrode surface, but will be dispersed into the wastewater under the action of water flow and stirring during the current interval, avoiding precipitation accumulation and ensuring that the electrode plate 210 maintains high reactivity for a long time.

[0031] like Figures 1-7 As shown, a stirring mechanism 3 is also provided inside the tank 1. The stirring mechanism 3 includes a rotating frame 301. A support rod 302 is fixedly connected to the lower surface of the rotating frame 301. Multiple stirring blades 303 are fixedly connected to the outer surface of the support rod 302. A straight groove 304 is opened on the upper surface of the rotating frame 301. A rotating rod 305 is rotatably connected to the upper surface of the fixed frame 202 through a bearing. A first rotating plate 306 is fixedly connected to the outer surface of the rotating rod 305. A second rotating plate 307 is rotatably connected to the outer surface of the first rotating plate 306 through a bearing. A connecting rod 308 is fixedly connected to the lower surface of the second rotating plate 307. A third rotating plate 309 is fixedly connected to the lower surface of the connecting rod 308. A slider 310 is rotatably connected to the lower surface of the other end of the third rotating plate 309 through a bearing. The slider 310 is slidably connected to the straight groove 304. The connecting rod 308 passes through the sliding frame 206 and is rotatably connected to the sliding frame 206. The support rod 302 passes through the electrode plate 210 and is rotatably connected to the electrode plate 210.

[0032] The effect is that the movement of the first rotating plate 306, the second rotating plate 307 and the connecting rod 308 causes the slider 310 at the lower end of the third rotating plate 309 to slide in the straight groove 304 of the rotating frame 301, thereby driving the rotating frame 301 to rotate around the fixed plate 201. The support rod 302 and the stirring blade 303 on the lower surface of the rotating frame 301 stir the sewage, enhance the contact frequency and uniformity between pollutants in the sewage and the electrode plate 210, accelerate the chemical reaction rate and improve the overall purification effect.

[0033] like Figures 1-7 As shown, the interior of the tank 1 is also equipped with a defoaming mechanism 4. The defoaming mechanism 4 includes a fourth rotating plate 401, which is rotatably connected to the slider 310 via a bearing. A fixing rod 402 is fixedly connected to the lower surface of the other end of the fourth rotating plate 401. A roller 403 is rotatably connected to the outer surface of the fixing rod 402 via a bearing. A curved groove 404 is provided on the lower surface of the rotating frame 301. The roller 403 is slidably connected to the curved groove 404. A defoaming frame 405 is fixedly connected to the lower surface of the fixing rod 402. Multiple defoaming rods 406 are fixedly connected to the lower surface of the defoaming frame 405.

[0034] The effect is that the slider 310 drives the fourth rotating plate 401, which is rotatably connected to it, to move. The roller 403 on the fixed rod 402 at the lower end of the fourth rotating plate 401 slides within the curved groove 404 on the lower surface of the rotating frame 301. This causes the defoaming frame 405 to move along the straight groove 304 while swinging at one end, breaking up the bubbles accumulated at the top of the tank 1 and preventing the bubbles from overflowing and interfering with the subsequent processing. When the defoaming rod 406 on the lower surface of the defoaming frame 405 passes the electrode plate 210, the rubber material at its bottom will knock the electrode plate 210, effectively shaking off the foam and impurities attached to the surface of the electrode plate 210, avoiding their accumulation and affecting the electrode reaction efficiency, and ensuring the continuous and stable operation of the electrode plate 210.

[0035] like Figures 1-7As shown, the tank body 1 is also equipped with a circulating heating mechanism 5. The circulating heating mechanism 5 includes a heat-conducting ring 501. Multiple heat-conducting wires 502 are installed on the lower surface of the heat-conducting ring 501. A positioning plate 504 is fixedly connected to the inner surface of the tank body 1. A transport pipe 505 is fixedly connected to the center of the positioning plate 504. A rubber membrane 506 is provided on the inner surface of the transport pipe 505. A water inlet pipe 507 and a water delivery pipe 508 are respectively connected to both sides of the transport pipe 505. A through hole 509 for connecting the water inlet pipe 507 and the water delivery pipe 508 is opened on the surface of the positioning plate 504. A sewage inlet pipe 510, a drain pipe 511, a sewage discharge pipe 512, and an exhaust pipe 513 are connected to the outer surface of the tank body 1. An installation rod 13 is rotatably connected to the outer surface of the support plate 208 through a bearing. A fifth rotating plate 6 is fixedly connected to the lower surface of the installation rod 13. The lower surface of the other end of the fifth rotating plate 6 rotates. An operating lever 7 is connected, and a lifting plate 8 is rotatably connected to the other end of the operating lever 7. The lifting plate 8 is slidably connected to the transport pipe 505. A heat-conducting sheet 9 is fixedly connected to the inner surface of the fixed frame 202. A heat-conducting rod 10 is provided on the lower surface of the heat-conducting sheet 9. A heat-insulating sleeve 14 is sleeved on the outer surface of the heat-conducting rod 10. The heat-insulating sleeve 14 is fixedly connected between the fixed plate 201 and the support plate 208. The heat-conducting rod 10 is fixedly connected to the heat-conducting ring 501. The heat-conducting ring 501 is fixedly connected to the lower surface of the support plate 208. The rotating frame 301 is rotatably connected to the fixed plate 201 through a bearing. The fixed plate 201 is fixedly connected to the tank 1. A double-headed motor 11 is installed on the upper surface of the fixed plate 201. The two output ends of the double-headed motor 11 are fixedly connected to the rotating disk 203 and the mounting rod 13, respectively. A reduction motor 12 is fixedly connected to the inner surface of the fixed frame 202. The upper surface of the reduction motor 12 is fixedly connected to the rotating rod 305.

[0036] The effect is as follows: the output shaft of the other end of the dual-head motor 11 drives the mounting rod 13 to rotate. Through the transmission of the fifth rotating plate 6 and the operating rod 7, the lifting plate 8 moves up and down reciprocally inside the tank 1. When the lifting plate 8 moves upward, a cavity negative pressure is formed between it and the rubber membrane 506 in the transport pipe 505, squeezing the rubber membrane 506 to deform it. Under the action of negative pressure, the sewage enters the transport pipe 505 through the inlet pipe 507. When the lifting plate 8 moves downward, the rubber membrane 506 returns to its original position, pushing the sewage in the transport pipe 505 back into the tank 1 from the water delivery pipe 508. Both the inlet pipe 507 and the water delivery pipe 508 are equipped with one-way valves to realize the circulation of sewage in the tank 1. During this process, the heat-conducting plate 9 on the inner surface of the fixing frame 202 is located directly below the magnet 204. As the magnet 204 rotates at high speed... As the heat-conducting plate 9 moves, it continuously cuts the changing magnetic lines of force. According to the principle of electromagnetic induction, eddy currents are generated inside the heat-conducting plate 9. Due to the resistance of the heat-conducting plate 9 itself, Joule heating is generated when the current passes through it, causing the temperature of the heat-conducting plate 9 to rise rapidly. The heat generated by the heat-conducting plate 9 is conducted downward through the heat-conducting rod 10 connected to it. The heat insulation sleeve 14, which is fitted on the outer surface of the heat-conducting rod 10, is fixed between the fixing plate 201 and the support plate 208. Its function is to reduce the loss of heat to the surrounding environment and to transfer the heat as much as possible along the heat-conducting rod 10 to the bottom heat-conducting ring 501. The heat-conducting wire 502 on the lower surface of the heat-conducting ring 501 further diffuses the heat evenly into the surrounding sewage, gradually increasing the sewage temperature. When the sewage temperature rises to a certain level, a high-temperature sterilization effect is achieved, avoiding interference with subsequent treatment processes and reducing the risk of secondary pollution.

[0037] Working principle: Wastewater from washing plastic granules flows into tank 1 through wastewater inlet pipe 510. At this time, the dual-head motor 11 on the fixed plate 201 starts, and its output shaft drives the rotating disk 203 to rotate within the fixed frame 202. The magnets 204 on the inner surface of the rotating disk 203 rotate accordingly. The magnets 204, with their positive and negative poles alternately arranged, generate a changing magnetic field. The reduction motor 12 inside the fixed frame 202 drives the rotating rod 305 to rotate, causing the first rotating plate 306 to rotate. The first rotating plate 306 then drives one end of the second rotating plate 307 to rotate around the rotating rod 305. The other end of the connecting rod 308 is inside the sliding frame 206, and the sliding frame 206 moves linearly along the limit rail 205. At this time, the connecting rod 308 can drive the sliding frame 207... 6. Sliding within the limiting rail 205, the coil 207 reciprocates in the changing magnetic field, alternately cutting magnetic field lines. When the coil 207 cuts the magnetic field lines, an induced current is generated according to the principle of electromagnetic induction. The diodes, capacitors, and other components in the external circuit form a rectification and control circuit to rectify, filter, and pulse-modulate the induced current: the diodes convert alternating current to direct current, the capacitors stabilize the current output, and the control circuit periodically switches the coil 207 between energization and de-energization, causing the current to be output in pulse form. The pulsed current is output to the two electrode plates 210, making one electrode plate positively charged as the anode and the other negatively charged as the cathode, thus initiating the electrolysis reaction. Oxidation occurs at the anode, decomposing the organic matter in the wastewater. The cathode promotes the reduction and precipitation of heavy metal ions, achieving preliminary purification of pollutants in wastewater. Because the coil 207 generates a pulsed current, a large number of bubbles are not continuously generated on the surface of the electrode plate 210. During the current conduction phase, the electrode undergoes an electrochemical reaction, producing a small number of bubbles. During the current disconnection phase, the bubbles have time to detach from the electrode surface, effectively reducing the formation of a gas film on the electrode surface. Simultaneously, the pulsed charging ensures that precipitates such as metal hydroxides generated during electrolysis do not continuously adhere to the electrode surface, but are dispersed into the wastewater during the current intervals under the action of water flow and stirring, preventing sediment accumulation and ensuring that the electrode plate 210 maintains high reactivity over a long period. The reduction motor 12 inside the fixing frame 202 drives the rotating rod 305 to rotate, causing the first rotating plate 306 and the second rotating rod 305 to rotate. The movement of the second rotating plate 307 and connecting rod 308 causes the slider 310 at the lower end of the third rotating plate 309 to slide within the straight groove 304 of the rotating frame 301, thereby driving the rotating frame 301 to rotate around the fixed plate 201. The support rod 302 and stirring blade 303 on the lower surface of the rotating frame 301 agitate the wastewater, enhancing the contact frequency and uniformity between pollutants in the wastewater and the electrode plate 210, accelerating the chemical reaction rate, and improving the overall purification effect. When the stirring mechanism 3 is running, the slider 310 drives the fourth rotating plate 401, which is rotatably connected to it, to move. The roller 403 on the fixed rod 402 at the lower end of the fourth rotating plate 401 slides within the curved groove 404 on the lower surface of the rotating frame 301, which allows the defoaming frame 405 to move along the direction of the straight groove 304.One end of the device performs a swinging motion to break up the bubbles accumulated at the top of the tank 1, preventing them from overflowing and interfering with subsequent processing. When the defoaming rod 406 on the lower surface of the defoaming rack 405 passes the electrode plate 210, the rubber material at its bottom strikes the electrode plate 210, effectively shaking off the foam and impurities adhering to the surface of the electrode plate 210, preventing their accumulation from affecting the electrode reaction efficiency, and ensuring the continuous and stable operation of the electrode plate 210. Primary purification is carried out at the top through electrolysis. The purified treated water enters below the support plate 208 through the valve body in the through hole 509 for subsequent heating, disinfection, and purification. The output shaft at the other end of the dual-head motor 11 drives... Rotating the mounting rod 13, through the transmission of the fifth rotating plate 6 and the operating rod 7, causes the lifting plate 8 to reciprocate up and down inside the tank 1. When the lifting plate 8 moves upward, a negative pressure cavity is formed between it and the rubber membrane 506 inside the transport pipe 505, squeezing the rubber membrane 506 and deforming it. Under the action of negative pressure, sewage enters the transport pipe 505 through the inlet pipe 507. When the lifting plate 8 moves downward, the rubber membrane 506 returns to its original position, pushing the sewage in the transport pipe 505 back into the tank 1 through the delivery pipe 508. Both the inlet pipe 507 and the delivery pipe 508 are equipped with one-way valves to realize the circulation of sewage within the tank 1. The heat-conducting plate 9 on the inner surface of the fixing frame 202 is located directly below the magnet 204. As the magnet 204 rotates at high speed, the heat-conducting plate 9 continuously cuts the changing magnetic lines of force. According to the principle of electromagnetic induction, eddy currents are generated inside the heat-conducting plate 9. Due to the resistance of the heat-conducting plate 9 itself, Joule heating is generated when the current passes through it, causing the temperature of the heat-conducting plate 9 to rise rapidly. The heat generated by the heat-conducting plate 9 is conducted downward through the heat-conducting rod 10 connected to it. The heat insulation sleeve 14 fitted on the outer surface of the heat-conducting rod 10 is fixed between the fixing plate 201 and the support plate 208. Its function is to reduce the heat loss to the surrounding environment and to transfer the heat as much as possible along the heat-conducting rod 10 to the bottom of the heating plate. The heat-conducting ring 501 and the heat-conducting wire 502 on its lower surface further diffuse heat evenly into the surrounding wastewater, gradually increasing the wastewater temperature. When the wastewater temperature rises to a certain level, a high-temperature sterilization effect is achieved, avoiding interference with subsequent treatment processes and reducing the risk of secondary pollution. After multi-stage treatment by the purification mechanism 2, stirring mechanism 3, defoaming mechanism 4, and circulating heating mechanism 5, the purified water is discharged from tank 1 through drain pipe 511. Sludge and impurities generated during the treatment process are discharged through drain pipe 512, and gases generated during the reaction process are discharged from exhaust pipe 513, completing the entire purification process for wastewater from plastic particle washing.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A multi-stage sewage purification device for plastic particle cleaning, comprising a tank body (1), characterized in that: The inside of the tank body (1) is provided with a purification mechanism (2), the purification mechanism (2) includes a fixed plate (201), the outer surface of the fixed plate (201) is fixedly connected with a fixed frame (202), the inner surface of the fixed frame (202) is rotatably connected with a rotating disc (203) through a bearing, the inner surface of the rotating disc (203) is fixedly connected with a magnet (204), the outer surface of the fixed frame (202) is fixedly connected with a limiting rail (205), the inner surface of the limiting rail (205) is slidably connected with a sliding frame (206), the outer surface of the sliding frame (206) is fixedly connected with a coil (207), the outer surface of the fixed frame (202) is provided with a through hole for the coil (207) to pass through, the inner surface of the tank body (1) is fixedly connected with a support plate (208), the upper surface of the support plate (208) is fixedly connected with two telescopic rods (209), the output ends of the two telescopic rods (209) are fixedly connected with an electrode plate (210), the inside of the tank body (1) is also provided with a stirring mechanism (3), the stirring mechanism (3) includes a rotating frame (301), the lower surface of the rotating frame (301) is fixedly connected with a support rod (302), the outer surface of the support rod (302) is fixedly connected with a plurality of stirring blades (303), the upper surface of the rotating frame (301) is provided with a straight slot (304), the upper surface of the fixed frame (202) is rotatably connected with a rotating rod (305) through a bearing, the outer surface of the rotating rod (305) is fixedly connected with a first rotating plate (306), the outer surface of the first rotating plate (306) is rotatably connected with a second rotating plate (307) through a bearing, the lower surface of the second rotating plate (307) is fixedly connected with a connecting rod (308), the lower surface of the connecting rod (308) is fixedly connected with a third rotating plate (309), the lower surface of the other end of the third rotating plate (309) is rotatably connected with a sliding block (310) through a bearing, the sliding block (310) is slidably connected with the straight slot (304), the connecting rod (308) penetrates through the sliding frame (206) and is rotatably connected with the sliding frame (206), the support rod (302) penetrates through the electrode plate (210) and is rotatably connected with the electrode plate (210), the outer surface of the support plate (208) is rotatably connected with a mounting rod (13) through a bearing, the lower surface of the mounting rod (13) is fixedly connected with a fifth rotating plate (6), the lower surface of the other end of the fifth rotating plate (6) is rotatably connected with an operating rod (7), the other end of the operating rod (7) is rotatably connected with a lifting plate (8),The lifting plate (8) is in sliding connection with the transportation pipeline (505), the upper surface of the fixed plate (201) is provided with a double-head motor (11), the two output ends of the double-head motor (11) are fixedly connected with a rotating disc (203) and a mounting rod (13) respectively, the double-head motor (11) is started, one end output shaft drives the rotating disc (203) to rotate in the fixed frame (202), the magnet (204) on the inner surface of the rotating disc (203) rotates, the magnet (204) is arranged alternately according to the positive and negative poles, a changing magnetic field is generated, the speed reducer (12) in the fixed frame (202) drives the rotating rod (305) to rotate, drives the first rotating plate (306) to rotate, the first rotating plate (306) drives one end of the second rotating plate (307) to rotate around the rotating rod (305), the other end of the connecting rod (308) is in the inside of the sliding frame (206), and the sliding frame (206) moves linearly along the limiting rail (205), at this time, the connecting rod (308) can drive the sliding frame (206) to slide in the limiting rail (205), so that the coil (207) reciprocates in the changing magnetic field, and alternately cuts the magnetic induction lines, when the coil (207) cuts the magnetic induction lines, according to the electromagnetic induction principle, an induced current is generated, diodes, capacitors and other elements arranged in an external circuit form a rectification and control circuit, the induced current is rectified, filtered and pulse modulated: the diode element converts alternating current into direct current, the capacitor element stabilizes current output, simultaneously, the control circuit realizes periodic switching of the coil (207) power on and power off, so that the current is output in the form of pulse, the pulse current is output to two electrode plates (210), so that one electrode plate (210) is positively charged as an anode, and the other is negatively charged as a cathode, and then an electrolysis reaction is started, an oxidation reaction occurs at the anode, and organic matter in sewage is decomposed.

2. The multi-stage sewage purification device for cleaning plastic particles according to claim 1, characterized in that: The inside of the tank body (1) is further provided with a defoaming mechanism (4), the defoaming mechanism (4) comprises a fourth rotating plate (401), the fourth rotating plate (401) is rotatably connected with the sliding block (310) through a bearing, and the lower surface of the other end of the fourth rotating plate (401) is fixedly connected with a fixed rod (402); the outer surface of the fixed rod (402) is rotatably connected with a roller (403) through a bearing; the lower surface of the rotating frame (301) is provided with a curved groove (404); the roller (403) is slidably connected with the curved groove (404); and the lower surface of the fixed rod (402) is fixedly connected with a defoaming frame (405), and the lower surface of the defoaming frame (405) is fixedly connected with a plurality of defoaming rods (406).

3. The multi-stage sewage purification device for cleaning plastic particles according to claim 1, characterized in that: The inside of the tank body (1) is further provided with a circulating heating mechanism (5), the circulating heating mechanism (5) comprises a heat-conducting ring (501), the lower surface of the heat-conducting ring (501) is provided with a plurality of heat-conducting wires (502), the inner surface of the tank body (1) is fixedly connected with a positioning plate (504), the center of the positioning plate (504) is fixedly connected with a conveying pipeline (505), the inner surface of the conveying pipeline (505) is provided with a rubber film (506), and the two sides of the conveying pipeline (505) are respectively and communicatively provided with a water inlet pipeline (507) and a water outlet pipeline (508); the surface of the positioning plate (504) is provided with a through hole (509) for communicating the water inlet pipeline (507) and the water outlet pipeline (508); and the outer surface of the tank body (1) is communicatively provided with a sewage inlet pipe (510), a drain pipe (511), a sewage discharge pipe (512) and an exhaust pipe (513).

4. The multi-stage sewage purification device for cleaning plastic particles according to claim 3, characterized in that: The inner surface of the fixed frame (202) is fixedly connected with a heat-conducting sheet (9), the lower surface of the heat-conducting sheet (9) is provided with a heat-conducting rod (10), the outer surface of the heat-conducting rod (10) is sleeved with a heat insulation sleeve (14), the heat insulation sleeve (14) is fixedly connected between the fixed plate (201) and the supporting plate (208), the heat-conducting rod (10) is fixedly connected with the heat-conducting ring (501), and the heat-conducting ring (501) is fixedly connected to the lower surface of the supporting plate (208).

5. The multi-stage sewage purification device for cleaning plastic particles according to claim 2, characterized in that: The rotating frame (301) is rotatably connected with the fixed plate (201) through a bearing, and the fixed plate (201) is fixedly connected with the tank body (1).

6. The multi-stage sewage purification device for cleaning plastic particles according to claim 1, characterized in that: The inner surface of the fixed frame (202) is fixedly connected with a speed reducer (12), and the upper surface of the speed reducer (12) is fixedly connected with the rotating rod (305).

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