Sewage multi-stage purification device for cleaning plastic particles

Abstract

The invention provides a sewage multi-stage purification device for plastic particle cleaning, and relates to the technical field of purification, the sewage multi-stage purification device comprises a tank body, a purification mechanism is arranged in the tank body, the purification mechanism comprises a fixing plate, the outer surface of the fixing plate is fixedly connected with a fixing frame, the inner surface of the fixing frame is rotatably connected with a rotating disc through a bearing, and the rotating disc is fixedly connected with the tank body. The inner surface of the rotating disc is fixedly connected with a magnet, the outer surface of the fixing frame is fixedly connected with a limiting rail, the coil reciprocates in a magnetic field to cut magnetic induction lines, and an electrolytic reaction that organic matter is oxidized and decomposed through an anode and heavy metal ions are reduced through a cathode is formed; gas films and sediment accumulation on the surfaces of the electrode plates are remarkably reduced, high reaction activity is maintained, purification of electrolytic oxidation reduction is achieved, the removal rate of heavy metal ions, surfactants and organic matter in sewage is greatly increased, compared with a single treatment mode, the efficiency is improved, the electrode maintenance cost is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of purification, and in particular to a multi-stage sewage purification device for cleaning plastic particles. Background Art

[0002] Heavy metal compounds such as lead, cadmium, and zinc are used as heat stabilizers in plastic production. Waste products containing heavy metals are mixed in during the recycling of recycled plastics, and industrial dust containing heavy metals is adsorbed on the surface. In the field of plastic particle cleaning, the presence of metal pollutants in wastewater poses a severe challenge to the treatment process. When conventional electrolysis is used to treat plastic cleaning wastewater containing heavy metal ions and organic matter, the electrode surface is prone to form a gas film due to continuous oxygen and hydrogen evolution, and the accumulation of metal hydroxide precipitation leads to electrode passivation, requiring frequent maintenance. A single stirring method is difficult to form a three-dimensional water flow, and the pollutants are not in sufficient contact with the electrode plates and magnetic adsorption components. Treatment blind spots are prone to occur, especially in high-concentration areas. , resulting in high residual levels of heavy metal ions and surfactants, which cannot meet the needs of deep purification. A large number of bubbles generated during the electrolysis process are prone to accumulate and overflow on the liquid surface, interfering with subsequent processes, and the accumulation of foam and impurities on the electrode surface further hinders the electrolysis reaction, resulting in a decrease in treatment efficiency. Traditional heating sterilization relies on an external heat source, has high energy consumption and slow temperature rise, and is difficult to effectively inactivate microorganisms in sewage whose resistance is enhanced due to the presence of metal pollutants. A single treatment process cannot simultaneously achieve heavy metal removal, organic matter decomposition and sterilization and disinfection, resulting in effluent microbial indicators easily exceeding the standard, and the risk of reuse or discharge is high. For this reason, we propose a multi-stage sewage purification device for plastic particle cleaning. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems and to propose a multi-stage sewage purification device for washing plastic particles.

[0004] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a multi-stage sewage purification device for cleaning plastic particles, comprising a tank body, a purification mechanism provided inside the tank body, the purification mechanism comprising a fixed plate, the outer surface of the fixed plate is fixedly connected to a fixed frame, the inner surface of the fixed frame is rotatably connected to a rotating disk via a bearing, the inner surface of the rotating disk is fixedly connected to a magnet, the outer surface of the fixed frame is fixedly connected to a limiting rail, the inner surface of the limiting rail is slidably connected to a sliding frame, the outer surface of the sliding frame is fixedly connected to a coil, the outer surface of the fixed frame is provided with a through hole for the coil to pass through, the inner surface of the tank body is fixedly connected to a support plate, the upper surface of the support plate is fixedly connected to two telescopic rods, and the output ends of the two telescopic rods are fixedly connected to electrode plates.

[0005] Preferably, a stirring mechanism is also provided inside the tank body, and the stirring mechanism includes a rotating frame, the lower surface of the rotating frame is fixedly connected to a support rod, the outer surface of the support rod is fixedly connected to a plurality of stirring blades, the upper surface of the rotating frame is provided with a straight groove, the upper surface of the fixed frame is rotatably connected to the rotating rod through a bearing, the outer surface of the rotating rod is fixedly connected to the first rotating plate, the outer surface of the first rotating plate is rotatably connected to the second rotating plate through a bearing, the lower surface of the second rotating plate is fixedly connected to the connecting rod, the lower surface of the connecting rod is fixedly connected to the third rotating plate, the lower surface of the other end of the third rotating plate is rotatably connected to a slider through a bearing, and 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 supporting rod passes through the electrode plate and is rotatably connected to the electrode plate.

[0007] Preferably, a defoaming mechanism is also provided inside the tank body, and the defoaming mechanism includes a fourth rotating plate, the fourth rotating plate is rotatably connected to the slider through a bearing, the lower surface of the other end of the fourth rotating plate is fixedly connected to a fixed rod, the outer surface of the fixed rod is rotatably connected to a roller through a bearing, a curved groove is provided on the lower surface of the rotating frame, the roller is slidably connected to the curved groove, the lower surface of the fixed rod is fixedly connected to a defoaming frame, and the lower surface of the defoaming frame is fixedly connected to a plurality of defoaming rods.

[0008] Preferably, a circulation heating mechanism is further provided inside the tank body, and the circulation heating mechanism includes a heat-conducting ring, and a plurality of heat-conducting wires are installed on the lower surface of the heat-conducting ring. The inner surface of the tank body is fixedly connected to a positioning plate, and 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, and a water inlet pipe and a water supply pipe are respectively connected on both sides of the transport pipe. A through hole for connecting the water inlet pipe and the water supply pipe is opened on the surface of the positioning plate, and the outer surface of the tank body is connected to a sewage inlet pipe, a drainage pipe, a sewage discharge pipe and an exhaust pipe.

[0009] Preferably, the outer surface of the support plate is rotatably connected to a mounting rod through 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 pipe.

[0010] Preferably, a heat conducting plate 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 plate, an outer surface of the heat conducting rod is provided with a heat insulating sleeve, 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 double-headed motor is installed on the upper surface of the fixed plate, and two output ends of the double-headed motor are fixedly connected to the rotating disk and the mounting rod respectively.

[0013] Preferably, a reduction motor is fixedly connected to the inner surface of the fixing bracket, and an upper surface of the reduction motor is fixedly connected to the rotating rod.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are 1. The present invention proposes a multi-stage sewage purification device for cleaning plastic particles. The magnet on the inner surface of the rotating disk rotates to generate a changing magnetic field, which drives the connecting rod to move through the first rotating plate and the second rotating plate, causing the sliding frame to move linearly along the limit rail. The coil moves back and forth in the magnetic field to cut the magnetic lines of force, generate an induced current, and form an electrolytic reaction of anodic oxidation to decompose organic matter and cathode reduction of heavy metal ions. Due to the pulsed current characteristics, the gas film and precipitation accumulation on the surface of the electrode plate are significantly reduced, maintaining high reaction activity, realizing electrolytic oxidation and reduction purification, and greatly improving the removal rate of heavy metal ions, surfactants and organic matter in sewage. Compared with a single treatment method, the efficiency is improved, and the electrode maintenance cost is reduced, thereby extending the service life of the equipment.

[0015] 2. The present invention proposes a multi-stage sewage purification device for cleaning plastic particles. The reduction motor in the fixed frame continuously drives the 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 in the straight groove of the rotating frame, thereby driving the rotating frame to rotate around the fixed plate. The support rods and stirring blades on the lower surface of the rotating frame stir the sewage to form a three-dimensional water flow, thereby enhancing the contact frequency and uniformity of pollutants with purification components such as electrode plates and magnets, accelerating the electrolysis reaction rate, improving the overall purification effect, effectively avoiding the problem of insufficient treatment due to excessive local concentration, and ensuring stable and efficient purification effect.

[0016] 3. The present invention proposes a multi-stage sewage purification device for cleaning plastic particles. When its stirring mechanism is in operation, the slider drives the fourth rotating plate connected to it to move, and the roller on the fixed rod at the lower end of the fourth rotating plate slides within a limited position in the curved groove on the lower surface of the rotating frame, so that the defoaming frame moves along the straight groove direction and swings to break the bubbles accumulated on the top of the tank body. At the same time, when the rubber defoaming rod on the lower surface of the defoaming frame passes through the electrode plate, it knocks and shakes off the foam and impurities on the surface of the electrode, which not only prevents the bubbles from overflowing and interfering with the treatment process, but also effectively cleans the attachments on the surface of the electrode plate, avoids the decrease in electrode reaction efficiency due to the accumulation of foam and impurities, ensures the continuous and stable operation of the electrode, and reduces the risk of equipment failure.

[0017] 4. The present invention proposes a multi-stage sewage purification device for cleaning plastic particles, in which the output shaft at the other end of the double-headed motor drives the mounting rod to rotate, and the lifting plate is made to reciprocate in the tank body through the fifth rotating plate and the operating rod, forming a cavity negative pressure with the rubber membrane to drive the sewage circulation. At the same time, the heat conducting plate on the inner surface of the fixed frame cuts the magnetic lines under the high-speed rotation of the magnet, generating eddy current and heat. The heat is transferred to the sewage through the heat conducting rod and the heat conducting ring, raising the water temperature to achieve high-temperature sterilization. Electromagnetic induction is used to generate heat by itself, and no additional heating equipment is required, which saves energy and reduces consumption. High-temperature sterilization effectively inactivates harmful microorganisms in sewage and reduces the risk of secondary pollution. It also cooperates with the purification, stirring and defoaming mechanisms to realize the integrated treatment of pollutant removal and sterilization, so that the effluent water quality reaches higher standards and meets reuse or strict discharge requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of a multi-stage sewage purification device for cleaning plastic particles proposed by the present invention; Figure 2 The present invention provides a schematic cross-sectional view of a multi-stage wastewater purification device for cleaning plastic particles; Figure 3 This is a partial cross-sectional structural diagram of a heat-insulating sleeve of a multi-stage wastewater purification device for cleaning plastic particles proposed by the present invention; Figure 4 This is a schematic diagram of the internal structure of a multi-stage wastewater purification device for cleaning plastic particles proposed in the present invention; Figure 5 This is a schematic diagram of the partial structure of the heat conducting plate of a multi-stage wastewater purification device for cleaning plastic particles proposed by the present invention; Figure 6 This is a partial structural diagram of the third rotating plate of a multi-stage sewage purification device for cleaning plastic particles proposed by the present invention; Figure 7 The present invention provides a schematic diagram of the partial structure of a curved trough of a multi-stage sewage purification device for cleaning plastic particles.

[0019] Legend: 1. Tank; 2. Purification mechanism; 201. Fixed plate; 202. Fixed frame; 203. Rotating disk; 204. Magnet; 205. Limit 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 , fixing 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 pipe; 513, exhaust pipe; 6, fifth rotating plate; 7, operating lever; 8, lifting plate; 9, heat-conducting plate; 10, heat-conducting rod; 11, double-headed motor; 12, reduction motor; 13, mounting rod; 14, thermal insulation sleeve. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] like Figure 1-Figure 7 As shown, a multi-stage sewage purification device for cleaning plastic particles includes a tank body 1, and a purification mechanism 2 is arranged inside the tank body 1. The purification mechanism 2 includes a fixed plate 201, the outer surface of the fixed plate 201 is fixedly connected to a fixed frame 202, the inner surface of the fixed frame 202 is rotatably connected to a rotating disk 203 through a bearing, the inner surface of the rotating disk 203 is fixedly connected to a magnet 204, the outer surface of the fixed frame 202 is fixedly connected to a limiting rail 205, the inner surface of the limiting rail 205 is slidably connected to a sliding frame 206, the outer surface of the sliding frame 206 is fixedly connected to a coil 207, and 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 to a support plate 208, the upper surface of the support plate 208 is fixedly connected to two telescopic rods 209, and the output ends of the two telescopic rods 209 are fixedly connected to an electrode plate 210.

[0023] The effect is that the magnet 204 on the inner surface of the rotating disk 203 rotates accordingly, generating a changing magnetic field, 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 moves back and forth in the changing magnetic field, alternately cutting the magnetic flux lines. When the coil 207 cuts the magnetic flux lines, an induced current is generated according to the principle of electromagnetic induction. The current is output in the form of pulses, and the pulse current is output to the 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, thereby starting an electrolysis reaction, and an oxidation reaction occurs at the anode to decompose the wastewater. Organic matter, the cathode promotes the reduction and precipitation of heavy metal ions, thereby achieving preliminary purification of pollutants in sewage. Since the coil 207 generates a pulsed current, a large number of bubbles will not continue to be generated on the surface of the electrode plate 210. During the current conduction stage, the electrode undergoes an electrochemical reaction to generate a small amount of bubbles. During the current disconnection stage, the bubbles have time to detach from the electrode surface, effectively reducing the formation of an air film on the electrode surface. At the same time, the pulsed charging prevents the precipitation of metal hydroxides and other precipitations generated during the electrolysis process from continuing to adhere to the electrode surface. Instead, they are dispersed into the sewage 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.

[0024] like Figure 1-Figure 7 As shown, the interior of the tank body 1 is also provided with a stirring mechanism 3, which includes a rotating frame 301, the lower surface of the rotating frame 301 is fixedly connected to a support rod 302, the outer surface of the support rod 302 is fixedly connected to a plurality of stirring blades 303, the upper surface of the rotating frame 301 is provided with a straight groove 304, the upper surface of the fixed frame 202 is rotatably connected to a rotating rod 305 through a bearing, the outer surface of the rotating rod 305 is fixedly connected to a first rotating plate 306, the outer surface of the first rotating plate 306 is rotatably connected to a second rotating plate 307 through a bearing, the lower surface of the second rotating plate 307 is fixedly connected to a connecting rod 308, the lower surface of the connecting rod 308 is fixedly connected to a third rotating plate 309, the lower surface of the other end of the third rotating plate 309 is rotatably connected to a slider 310 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.

[0025] The effect is that the first rotating plate 306, the second rotating plate 307 and the connecting rod 308 move, causing 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, and the support rod 302 and the stirring blade 303 on the lower surface of the rotating frame 301 stir the sewage, thereby enhancing the contact frequency and uniformity between the pollutants in the sewage and the electrode plate 210, accelerating the chemical reaction rate, and improving the overall purification effect.

[0026] like Figure 1-Figure 7 As shown, a defoaming mechanism 4 is also provided inside the tank body 1, and the defoaming mechanism 4 includes a fourth rotating plate 401, which is rotatably connected to the slider 310 through a bearing, and the lower surface of the other end of the fourth rotating plate 401 is fixedly connected to a fixed rod 402, and the outer surface of the fixed rod 402 is rotatably connected to a roller 403 through a bearing, and a curved groove 404 is provided on the lower surface of the rotating frame 301, and the roller 403 is slidably connected to the curved groove 404, and the lower surface of the fixed rod 402 is fixedly connected to a defoaming frame 405, and the lower surface of the defoaming frame 405 is fixedly connected to a plurality of defoaming rods 406.

[0027] The effect is that the slider 310 drives the fourth rotating plate 401 connected to it for rotation to move, and 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 enables the defoaming frame 405 to move along the direction of the straight groove 304 while swinging at one end, thereby breaking the bubbles accumulated on the top of the tank body 1 and preventing the bubbles from overflowing and interfering with the subsequent processing flow. When the defoaming rod 406 on the lower surface of the defoaming frame 405 passes through the electrode plate 210, the rubber material at its bottom will knock on 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.

[0028] like Figure 1-Figure 7As shown, a circulating heating mechanism 5 is also provided inside the tank body 1, and the circulating heating mechanism 5 includes a heat-conducting ring 501, and a plurality of heat-conducting wires 502 are installed on the lower surface of the heat-conducting ring 501. The inner surface of the tank body 1 is fixedly connected to a positioning plate 504, and a transport pipe 505 is fixedly connected to the center of the positioning plate 504. The inner surface of the transport pipe 505 is provided with a rubber membrane 506, and the two sides of the transport pipe 505 are respectively connected with a water inlet pipe 507 and a water delivery pipe 508. A through hole 509 for connecting the water inlet pipe 507 and the water delivery pipe 508 is provided on the surface of the positioning plate 504. The outer surface of the tank body 1 is connected with a sewage inlet pipe 510, a drainage pipe 511, a sewage pipe 512 and an exhaust pipe 513. The outer surface of the support plate 208 is rotatably connected to the mounting rod 13 through a bearing. The lower surface of the mounting rod 13 is fixedly connected to the fifth rotating plate 6, and the lower surface of the other end of the fifth rotating plate 6 rotates It is connected to an operating rod 7, the other end of the operating rod 7 is rotatably connected to a lifting plate 8, and the lifting plate 8 is slidingly connected to the transport pipe 505. The inner surface of the fixed frame 202 is fixedly connected to a heat conducting plate 9, and the lower surface of the heat conducting plate 9 is provided with a heat conducting rod 10. The outer surface of the heat conducting rod 10 is provided with a heat insulating sleeve 14, and 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, and 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, and the fixed plate 201 is fixedly connected to the tank body 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. The inner surface of the fixed frame 202 is fixedly connected to the reduction motor 12, and the upper surface of the reduction motor 12 is fixedly connected to the rotating rod 305.

[0029] The effect is that the output shaft at the other end of the double-headed motor 11 drives the mounting rod 13 to rotate, and through the transmission of the fifth rotating plate 6 and the operating rod 7, the lifting plate 8 is made to reciprocate up and down in the tank body 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, and the sewage enters the transport pipe 505 through the water inlet pipe 507 under the action of the negative pressure. When the lifting plate 8 moves downward, the rubber membrane 506 is reset, and the sewage in the transport pipe 505 is pressed back into the tank body 1 from the water delivery pipe 508. Both the water inlet pipe 507 and the water delivery pipe 508 are provided with a one-way valve to realize the circulation of sewage in the tank body 1. In 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 a high speed The heat conducting sheet 9 continuously cuts the changing magnetic lines of force. According to the principle of electromagnetic induction, eddy current is generated inside the heat conducting sheet 9. Since the heat conducting sheet 9 has its own resistance, Joule heat is generated when the current passes through, which makes the temperature of the heat conducting sheet 9 rise rapidly. The heat generated by the heat conducting sheet 9 is downwardly conducted through the heat conducting rod 10 connected thereto. The heat insulating sleeve 14 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 transfer the heat as much as possible along the heat conducting rod 10 to the heat conducting ring 501 at the bottom. The heat conducting wire 502 on the lower surface of the heat conducting ring 501 further evenly diffuses the heat into the surrounding sewage, gradually raising the sewage temperature. When the sewage temperature rises to a certain level, the high-temperature sterilization effect is achieved, avoiding interference with subsequent treatment processes and reducing the risk of secondary pollution.

[0030] Working principle: the plastic particle cleaning wastewater to be treated flows into the tank body 1 through the sewage inlet pipe 510. At this time, the double-headed motor 11 on the fixed plate 201 is started, and the output shaft at one end drives the rotating disk 203 to rotate in the fixed frame 202, and the magnet 204 on the inner surface of the rotating disk 203 rotates accordingly. The magnet 204 is arranged in an alternating manner according to the positive and negative poles to generate a changing magnetic field. The reduction motor 12 in the fixed frame 202 drives the rotating rod 305 to rotate, driving the first rotating plate 306 to rotate, and 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 inside 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 20 6 slides in the limit rail 205, so that the coil 207 moves back and forth in the changing magnetic field, alternately cutting the magnetic flux lines. When the coil 207 cuts the magnetic flux lines, an induced current is generated according to the principle of electromagnetic induction. The diodes, capacitors and other components arranged in the external circuit form a rectification and control circuit to rectify, filter and pulse modulate the induced current: the diode component converts the alternating current into direct current, and the capacitor component stabilizes the current output. At the same time, the control circuit realizes the periodic switching of the power on and off of the coil 207, so that the current is output in the form of pulses. The pulse current is output to the 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, thereby starting the electrolysis reaction. The anode undergoes an oxidation reaction to decompose the organic matter in the sewage. The cathode promotes the reduction and precipitation of heavy metal ions, thereby achieving preliminary purification of pollutants in sewage. 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 amount of bubbles. During the current disconnection stage, the bubbles have time to detach from the electrode surface, effectively reducing the formation of an air film on the electrode surface. At the same time, the pulsed charging prevents the precipitation of metal hydroxides and other precipitations generated during the electrolysis process from continuously adhering to the electrode surface. Instead, they are dispersed into the sewage under the action of water flow and stirring during the current interval, thereby avoiding precipitation accumulation and ensuring that the electrode plate 210 maintains high reactivity for a long time. The reduction motor 12 in the fixed frame 202 drives the rotating rod 305 to rotate, driving the first rotating plate 306 and the second rotating plate 307 to rotate. The second rotating plate 307 and the connecting rod 308 move, so that the slider 310 at the lower end of the third rotating plate 309 slides in the straight groove 304 of the rotating frame 301, thereby driving the rotating frame 301 to rotate around the fixed plate 201, and the support rod 302 and the stirring blade 303 on the lower surface of the rotating frame 301 stir the sewage, thereby enhancing the contact frequency and uniformity between the pollutants in the sewage 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 connected thereto to move, and 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 makes the defoaming frame 405 move along the straight groove 304.One end makes a swinging motion to break the bubbles accumulated on the top of the tank body 1 to prevent the bubbles from overflowing and interfering with the subsequent treatment process. When the defoaming rod 406 on the lower surface of the defoaming rack 405 passes through the electrode plate 210, the rubber material at its bottom will knock on 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, ensuring the continuous and stable operation of the electrode plate 210, and performing primary purification through electrolysis at the top. The purified treated water enters the bottom of 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 double-headed motor 11 drives The mounting rod 13 rotates, and the lifting plate 8 is driven by the fifth rotating plate 6 and the operating rod 7 to make the lifting plate 8 reciprocate up and down in the tank body 1. When the lifting plate 8 moves upward, a cavity negative pressure is formed between the lifting plate 8 and the rubber membrane 506 in the transport pipe 505, squeezing the rubber membrane 506 to deform it. Under the action of the negative pressure, the sewage enters the transport pipe 505 through the water inlet pipe 507. When the lifting plate 8 moves downward, the rubber membrane 506 is reset, and the sewage in the transport pipe 505 is pressed back into the tank body 1 through the water delivery pipe 508. Both the water inlet pipe 507 and the water delivery pipe 508 are provided with a one-way valve to realize the circulation of sewage in the tank body 1. In this process, The heat conducting sheet 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 sheet 9 continuously cuts the changing magnetic lines of force. According to the principle of electromagnetic induction, eddy current is generated inside the heat conducting sheet 9. Since the heat conducting sheet 9 itself has resistance, Joule heat is generated when current passes through, causing the temperature of the heat conducting sheet 9 to rise rapidly. The heat generated by the heat conducting sheet 9 is conducted downward through the heat conducting rod 10 connected thereto. The heat insulating sleeve 14 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 of the heat conducting rod 10. Heat ring 501 and heat conducting wire 502 on its lower surface further evenly diffuse heat into the surrounding wastewater, gradually raising the wastewater temperature. When the wastewater temperature reaches a certain level, a high-temperature sterilization effect is achieved, avoiding interference with subsequent treatment processes while reducing the risk of secondary contamination. After multi-stage treatment by 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 are discharged through exhaust pipe 513, completing the entire plastic pellet washing wastewater purification process.

[0031] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A multi-stage wastewater purification device for cleaning plastic particles, comprising a tank (1), characterized in that: A purification mechanism (2) is provided inside the tank body (1), and the purification mechanism (2) comprises a fixed plate (201), the outer surface of the fixed plate (201) is fixedly connected to a fixed frame (202), the inner surface of the fixed frame (202) is rotatably connected to a rotating disk (203) via a bearing, the inner surface of the rotating disk (203) is fixedly connected to a magnet (204), the outer surface of the fixed frame (202) is fixedly connected to a limiting rail (205), the inner surface of the limiting rail (205) is slidably connected to a sliding frame (206), the outer surface of the sliding frame (206) is fixedly connected to a coil (207), and 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 to a support plate (208), the upper surface of the support plate (208) is fixedly connected to two telescopic rods (209), and the output ends of the two telescopic rods (209) are fixedly connected to an electrode plate (210).

2. The multi-stage wastewater purification device for cleaning plastic particles according to claim 1, characterized in that: The tank body (1) is further provided with a stirring mechanism (3), comprising a rotating frame (301), a support rod (302) fixedly connected to the lower surface of the rotating frame (301), a plurality of stirring blades (303) fixedly connected to the outer surface of the support rod (302), a straight groove (304) provided on the upper surface of the rotating frame (301), a rotating rod (305) rotatably connected to the upper surface of the fixed frame (202) via a bearing, a first rotating plate (306) fixedly connected to the outer surface of the rotating rod (305), a second rotating plate (307) rotatably connected to the outer surface of the first rotating plate (306) via a bearing, a connecting rod (308) fixedly connected to the lower surface of the second rotating plate (307), a third rotating plate (309) fixedly connected to the lower surface of the connecting rod (308), a slider (310) rotatably connected to the lower surface of the other end of the third rotating plate (309) via a bearing, and the slider (310) is slidably connected to the straight groove (304).

3. The multi-stage wastewater purification device for cleaning plastic particles according to claim 2, characterized in that: The connecting rod (308) passes through the sliding frame (206) and is rotatably connected to the sliding frame (206); the supporting rod (302) passes through the electrode plate (210) and is rotatably connected to the electrode plate (210).

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

5. The multi-stage wastewater purification device for cleaning plastic particles according to claim 1, characterized in that: A circulating heating mechanism (5) is further provided inside the tank body (1), the circulating heating mechanism (5) comprising a heat-conducting ring (501), a plurality of heat-conducting wires (502) being mounted on the lower surface of the heat-conducting ring (501), a positioning plate (504) being fixedly connected to the inner surface of the tank body (1), a transport pipe (505) being fixedly connected to the center of the positioning plate (504), a rubber membrane (506) being provided on the inner surface of the transport pipe (505), a water inlet pipe (507) and a water delivery pipe (508) being respectively connected on 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 provided on the surface of the positioning plate (504), and a sewage inlet pipe (510), a drainage pipe (511), a sewage discharge pipe (512) and an exhaust pipe (513) are connected to the outer surface of the tank body (1).

6. The multi-stage wastewater purification device for cleaning plastic particles according to claim 1, characterized in that: The outer surface of the support plate (208) is rotatably connected to a mounting rod (13) via a bearing, the lower surface of the mounting rod (13) is fixedly connected to a fifth rotating plate (6), the lower surface of the other end of the fifth rotating plate (6) is rotatably connected to an operating rod (7), the other end of the operating rod (7) is rotatably connected to a lifting plate (8), and the lifting plate (8) is slidably connected to the transport pipe (505).

7. The multi-stage wastewater purification device for cleaning plastic particles according to claim 5, characterized in that: A heat conducting plate (9) is fixedly connected to the inner surface of the fixing frame (202), a heat conducting rod (10) is provided on the lower surface of the heat conducting plate (9), an outer surface of the heat conducting rod (10) is provided with a heat insulating sleeve (14), the heat insulating sleeve (14) is fixedly connected between the fixing plate (201) and the support plate (208), the heat conducting rod (10) is fixedly connected to the heat conducting ring (501), and the heat conducting ring (501) is fixedly connected to the lower surface of the support plate (208).

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

9. The multi-stage wastewater purification device for cleaning plastic particles according to claim 6, characterized in that: A double-headed motor (11) is mounted on the upper surface of the fixed plate (201), and two output ends of the double-headed motor (11) are fixedly connected to the rotating disk (203) and the mounting rod (13), respectively.

10. The multi-stage wastewater purification device for cleaning plastic particles according to claim 1, characterized in that: The inner surface of the fixing frame (202) is fixedly connected to a reduction motor (12), and the upper surface of the reduction motor (12) is fixedly connected to the rotating rod (305).

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