A wastewater purification device for plastic product processing

Abstract

This invention relates to the field of wastewater purification, specifically a wastewater purification device for plastic product processing. It includes a water tank with an aeration pipe, a support column rotatably connected to the center of the tank, and a ring-shaped support body on the outer edge of the upper part of the tank. Multiple discharge ports are arranged in a circular array on the support body. A toothed ring is rotatably connected to the outer edge of the upper surface of the support body, and a drive assembly for rotating the toothed ring is connected to its outer ring. Multiple scrapers are arranged between the inner ring of the toothed ring and the support column. One edge of each scraper has a slope and is inclined towards the bottom of the tank. A guide groove is formed on the upper surface of the scraper and is inclined towards the discharge ports. In this invention, fine impurities are purified and discharged from the top of the tank through aeration and flotation. The rotation of the scrapers drives the wastewater to rotate, causing larger impurities to accumulate at the bottom of the tank and be filtered and discharged through a filter screen, resulting in more thorough wastewater purification.

Description

Technical Field

[0001] This invention relates to the field of wastewater purification, specifically a wastewater purification device for plastic product processing. Background Technology

[0002] Water is used in many stages of plastic product manufacturing. For example, water is used to wash away foreign objects from the surface of raw plastic materials, especially recycled plastics. When plastics are crushed into sheets, there is often a lot of dirt on the surface. During the crushing process, some dirt is detached from the plastic, but the remaining stubborn dirt needs to be removed by washing. Multiple washes are required to meet production requirements. This washing process generates a large amount of wastewater containing various types of contaminants, including plastic particles, mud, dust, and organic pollutants such as grease, ink, glue, plastic additives, food residue, and surfactants.

[0003] The aforementioned wastewater needs to be purified before it can be discharged into the natural environment or reused. Currently, sedimentation is used for purification. Flocculants are added to cause the stains to coagulate and form large flocs, which are then allowed to settle. In terms of efficiency, this purification method requires a long time to allow the stains to coagulate, resulting in low efficiency. In terms of the degree of purification, some pollutants do not coagulate during coagulation and sedimentation and remain floating in the water, resulting in poor treatment intensity.

[0004] Therefore, a wastewater purification device for plastic product processing is proposed to address the above problems. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a wastewater purification device for plastic product processing, including a water tank with an aeration pipe, a support column rotatably connected to the center of the water tank, a ring-shaped support body on the outer ring of the upper end of the water tank, multiple sewage outlets arranged in a circular array on the support body, a toothed ring rotatably connected to the outer edge of the upper end face of the support body, a drive component for driving the rotation of the toothed ring connected to the outer ring of the toothed ring, multiple scrapers arranged between the inner ring of the toothed ring and the support column, a slope on one edge of the scraper, and one edge of the scraper inclined towards the bottom of the water tank, a guide groove is opened on the upper surface of the scraper, and the guide groove is inclined towards the sewage outlet;

[0007] The bottom of the pool is equipped with an injection pipe, and a drain outlet is opened at the center of the bottom of the pool. The bottom of the support column is supported by a support rod at the drain outlet, and a sealing plate is provided below the drain outlet to seal the drain outlet.

[0008] Preferably, the bottom of the pool is provided with a guide funnel for collecting waste, the flared edge of the guide funnel is fixed to the inner side wall of the pool, and the narrowed part of the guide funnel is fixed to the edge of the drain outlet.

[0009] Preferably, each of the flow guide grooves is rotatably connected with a spiral blade, and one end of each spiral blade is fixedly connected with a gear;

[0010] The support body is provided with an end face toothed ring, which meshes with each gear; the spiral blade rotates around the axis of the support column with the scraper, the end face toothed ring rubs the gear to rotate, and drives the spiral blade to rotate.

[0011] Preferably, the upper end face of the support column is provided with an air supply pipe, the outer ring of the air supply pipe is provided with multiple exhaust holes, a hollow ring is fitted on the outer ring of the air supply pipe, the inner ring of the ring is provided with an air inlet hole communicating with the exhaust holes, the outer ring of the ring is provided with multiple branch pipes, each branch pipe extends to the other edge of the scraper, and a row of vertically downward aeration pipes is provided at the other edge of each scraper, and the same row of aeration pipes is connected to the branch pipes above it.

[0012] Preferably, the upper outer ring of the pool is provided with a surrounding plate, the upper surface of the surrounding plate is fixed to the lower surface of the support body, the lower surface of the surrounding plate is sealed to the pool, and the lower surface of the surrounding plate is inclined. A sewage pipe is connected to the low-lying position at the lower end of the surrounding plate.

[0013] Preferably, multiple injection pipes are arranged in a circular array at the bottom of the water tank, with the ends of the injection pipes extending through to the upper surface of the guide funnel.

[0014] Preferably, the bottom of the guide groove on each scraper is higher than the upper surface of the water tank, and one end of each scraper is provided with an arc-shaped guide plate, the upper surface of the guide plate is flush with the inner surface of the guide groove, and the end of the guide plate extends to the top of the drain outlet.

[0015] Preferably, the air outlet on each of the aeration pipes is positioned away from one edge of the scraper to which it is connected.

[0016] Preferably, a channel is horizontally provided at the bottom of the pool, the channel is connected to the drain outlet, and the sealing plate is slidably connected in the channel.

[0017] Preferably, the outer ring of the water tank is provided with a main pipe, which is arranged in a ring shape and connected to multiple injection pipes.

[0018] The advantages of this invention are:

[0019] 1. In this invention, tiny impurities are purified and discharged from the top of the pool by aeration and flotation. The wastewater is rotated by the rotation of the scraper, and larger impurities accumulate at the bottom of the pool and are filtered and discharged by the filter screen at the bottom of the pool, making the wastewater purification more thorough.

[0020] 2. In this invention, the air bubbles generated by the aeration pipe adhere to the dirt, causing the dirt to float on the surface of the wastewater. At the same time, multiple scrapers rotate, with one edge of the scraper digging below the liquid surface. When the scraper scrapes the dirt, the dirt flowing into the guide channel can quickly flow into the discharge port according to the tilt angle of the guide channel. At the same time, the rotation of the scraper generates centrifugal force, which throws the dirt in the guide channel away and flows towards the discharge port, which also helps to quickly discharge the dirt. Attached Figure Description

[0021] Figure 1 This is a first-view perspective perspective view of the wastewater purification device in this invention;

[0022] Figure 2 This is a second-view perspective perspective view of the wastewater purification device in this invention;

[0023] Figure 3 This is a top view of the wastewater purification device in this invention;

[0024] Figure 4 This is a side view of the wastewater purification device in this invention;

[0025] Figure 5 This is a schematic diagram of the circumferential array of multiple scrapers in this invention;

[0026] Figure 6 These are side views of multiple scrapers in this invention;

[0027] Figure 7 This is a perspective view of the scraper in this invention;

[0028] Figure 8 This is a perspective view of the water tank in this invention;

[0029] Figure 9 for Figure 8 A magnified view of a section at point A in the middle;

[0030] Figure 10 This is a top view of the water tank in this invention;

[0031] Figure 11 This is a cross-sectional view of the water tank in this invention.

[0032] In the diagram: 1. Aeration pipe; 2. Water tank; 3. Support column; 4. Support body; 5. Sewage outlet; 6. Gear ring; 7. Scraper; 8. Slope; 9. Guide channel; 10. Injection pipe; 11. Drain outlet; 12. Sealing plate; 13. Gear motor; 14. Drive gear; 15. Mounting groove; 16. Positioning block; 17. Positioning groove; 18. Locking rod; 19. Guide funnel; 20. Spiral blade; 21. Gear; 22. End face gear ring; 23. Air supply pipe; 24. Ring body; 25. Branch pipe; 26. Enclosure plate; 27. Sewage pipe; 28. Guide plate; 29. ​​Channel; 30. Push-pull rod; 31. Main pipe. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] Reference Figure 1 - Figure 10 A wastewater purification device for plastic product processing includes a water tank 2 with an aeration pipe 1, a support column 3 rotatably connected to the center of the water tank 2, a ring-shaped support body 4 with multiple sewage outlets 5 arranged in a circular array on the upper outer ring of the water tank 2, a toothed ring 6 rotatably connected to the outer edge of the upper surface of the support body 4, a drive component for driving the rotation of the toothed ring 6 connected to the outer ring of the toothed ring 6, multiple scrapers 7 between the inner ring of the toothed ring 6 and the support column 3, a slope 8 on one edge of the scraper 7 and an inclined edge of the scraper 7 towards the bottom of the water tank 2, a guide groove 9 on the upper surface of the scraper 7 and an inclined guide groove 9 towards the sewage outlets 5;

[0035] The bottom of the water tank 2 is provided with an injection pipe 10, and a drain outlet 11 is opened at the center of the bottom of the water tank 2. The bottom of the support column 3 is supported by a support rod at the drain outlet 11, and a sealing plate 12 is provided below the drain outlet 11. The sealing plate 12 is used to seal the drain outlet 11.

[0036] In this embodiment of the invention, the driving assembly may consist of a geared motor 13 and a driving gear 14. The output end of the geared motor 13 is fixedly connected to the driving gear 14, which meshes with the gear ring 6, thereby driving the gear ring 6 to rotate slowly on the support 4. Figure 3 As shown, it can drive the toothed ring 6 to rotate counterclockwise;

[0037] Wastewater is injected into the water tank 2 through the injection pipe 10, and the aeration device is driven. The aeration device is connected to the aeration pipe 1 and generates a large number of tiny bubbles. After the wastewater is full, the injection is stopped. Then the toothed ring 6 is driven to rotate. The toothed ring 6 synchronously drives multiple scrapers 7 to rotate around the axis of the support column 3. At the same time, the scrapers 7 also drive the support column 3 to rotate.

[0038] The bubbles generated by the aeration pipe 1 adhere to the dirt, causing the dirt to float on the surface of the wastewater. At the same time, multiple scrapers 7 rotate, and one edge of the scraper 7 scoops into the liquid below the surface. Due to the pushing force of the scraper 7 on the wastewater, the dirt flows along the slope 8 into the guide channel 9, and then flows along the guide channel 9 to the discharge port 5. Finally, it is discharged away through the discharge port 5, thus purifying the wastewater.

[0039] When the scraper 7 scrapes the dirt, the dirt flowing into the guide channel 9 can quickly flow into the drain outlet 5 according to the tilt angle of the guide channel 9. At the same time, the rotation of the scraper 7 generates centrifugal force, which throws the dirt in the guide channel 9 away and flows towards the drain outlet 5, which also helps the dirt to be discharged quickly.

[0040] As multiple scrapers 7 slowly rotate, they simultaneously push the wastewater, creating vortices within the wastewater. These vortices rotate slowly, insufficient to hinder the combination and buoyancy of aeration bubbles with impurities. The slowly rotating wastewater then gathers larger impurities or those too small to float to the surface, converging them at the drain outlet 11. That is, impurities that have sunk to the bottom of the pool 2 are gathered at the drain outlet 11. After wastewater purification is complete, the sealing plate 12 is opened, and the purified wastewater is discharged from the drain outlet 11. This allows for the rapid removal of impurities accumulated at the bottom of the pool 2. Simultaneously, a filter screen is installed at the drain outlet 11 to filter impurities, achieving multi-stage filtration of the wastewater. Specifically, aeration causes small impurities to float and be purified from the top of the pool 2, while the rotation of the scrapers 7 causes the wastewater to rotate, accumulating larger impurities at the bottom of the pool 2, which are then filtered and discharged at the bottom, resulting in more thorough wastewater purification.

[0041] Considering the assembly of the entire wastewater purification device, multiple mounting slots 15 are opened on the upper end face of the support column 3, multiple positioning blocks 16 are set in the inner ring of the toothed ring 6, and multiple positioning slots 17 are opened on the positioning blocks 16. Multiple locking rods 18 are set at both ends of each scraper 7. The locking rods 18 are embedded in the mounting slots 15 and positioning slots 17, connecting the toothed ring 6, scraper 7 and support column 3 together, which facilitates the disassembly and replacement of scraper 7, or the cleaning of stains attached to the slope 8 of scraper 7.

[0042] Reference Figure 1 - Figure 11 The bottom of the water tank 2 is provided with a guide funnel 19 for collecting sewage. The flared edge of the guide funnel 19 is fixed to the inner side wall of the water tank 2, and the constricted part of the guide funnel 19 is fixed to the edge of the drain outlet 11.

[0043] The injection pipe 10 extends through to the top of the guide funnel 19. After the pool 2 is filled with wastewater, the scraper 7 rotates slowly and pushes the wastewater to rotate in the pool 2. Due to the shape of the guide funnel 19, larger debris in the wastewater will flow in accordance with the inclined trend of the guide funnel 19, increasing the tendency of the debris at the bottom of the pool 2 to flow towards the drain outlet 11. This allows more debris to accumulate quickly at the narrowed part of the guide funnel 19, i.e., at the drain outlet 11. When wastewater is discharged from the drain outlet 11, the filter screen can catch the debris in time. After the filter screen is removed, the remaining wastewater in the pool 2 can be discharged quickly, improving the wastewater discharge efficiency.

[0044] The inclined surface of the guide funnel 19 reduces the amount of dirt residue in the pool 2, making it easier to clean the pool 2 later.

[0045] Reference Figure 5 - Figure 7 Each of the flow guide grooves 9 is rotatably connected to a spiral blade 20, and one end of each spiral blade 20 is fixedly connected to a gear 21;

[0046] The support body 4 is provided with an end face toothed ring 22, which meshes with each gear 21; the spiral blade 20 rotates with the scraper 7 around the axis of the support column 3, the end face toothed ring 22 rubs the gear 21 to rotate, and drives the spiral blade 20 to rotate.

[0047] Each spiral blade 20 is equipped with a gear 21 near the end of the drain outlet 5. The gear 21 meshes with the end face toothed ring 22. The toothed ring 6 drives the scraper 7 to rotate around the axis of the support column 3. At the same time, the end face toothed ring 22 rubs the gear 21 to rotate, which drives the spiral blade 20 to rotate. When the spiral blade 20 rotates, it can push the dirt in the guide channel 9 toward the drain outlet 5, increase the discharge speed of the dirt, and prevent the dirt from flowing into the guide channel 9 and accumulating, overflowing the guide channel 9, and flowing back into the water tank 2.

[0048] The rotating spiral blade 20 pushes the dirt in the guide channel 9 to accelerate the removal of dirt. At this time, the operating power of the aeration equipment can be increased to provide more bubbles. The rotation speed of the scraper 7 can also be increased appropriately to scrape off more dirt with attached bubbles per unit time, thereby improving the wastewater purification efficiency.

[0049] Reference Figure 5 - Figure 7 The upper end face of the support column 3 is provided with an air supply pipe 23. Multiple exhaust holes are opened on the outer ring of the air supply pipe 23. A hollow ring 24 is fitted on the outer ring of the air supply pipe 23. An air inlet hole communicating with the exhaust holes is provided on the inner ring of the ring 24. Multiple branch pipes 25 are provided on the outer ring of the ring 24. Each branch pipe 25 extends to the other edge of the scraper 7. A row of vertically downward aeration pipes 1 is provided at the other edge of each scraper 7. The same row of aeration pipes 1 is connected to the branch pipes 25 above it.

[0050] The aeration equipment is connected to the air supply pipe 23, which is connected to multiple branch pipes 25 through the ring body 24. Each branch pipe 25 is connected to a row of aeration pipes 1, and the ring body 24 can rotate around the air supply pipe 23. At the same time, the gas in the air supply pipe 23 can be continuously injected into the ring body 24. Specifically, the gas flows into the multiple branch pipes 25 in sequence along the air supply pipe 23, the exhaust hole, the ring body 24 and the air inlet hole.

[0051] The aeration pipe 1 is fixed on the scraper 7 and rotates around the axis of the support column 3 with the scraper 7. At this time, the bubbles generated by the aeration pipe 1 can be densely distributed in the entire water tank 2, which improves the adhesion effect of bubbles and dirt in the water tank 2. Furthermore, the bubbles discharged from the aeration pipe 1 on the previous scraper 7 combine with the dirt and float to the surface of the liquid. At this time, the subsequent scraper 7 has rotated to the position where the dirt floats. The dirt can quickly slide into the subsequent rotating scraper 7 and be quickly pushed into the drain outlet 5 by the spiral blade 20.

[0052] Reference Figure 1 - Figure 4 ,as well as Figure 11 The upper outer ring of the water tank 2 is provided with a surrounding plate 26. The upper end surface of the surrounding plate 26 is fixed to the lower surface of the support body 4. The lower end surface of the surrounding plate 26 is sealed to the water tank 2, and the lower end surface of the surrounding plate 26 is inclined. The low-lying position at the lower end of the surrounding plate 26 is connected to a sewage pipe 27.

[0053] The enclosure 26, in conjunction with the outer wall of the pool 2, is used to collect the waste flowing down from the drain outlet 5. The waste is concentrated and flows to the low-lying area of ​​the enclosure 26, making it convenient to clean the waste. Then, it is drained away from the wastewater purification device through the drain pipe 27 for subsequent secondary purification.

[0054] Reference Figure 11 Multiple injection pipes 10 are arranged in a circular array at the bottom of the water tank 2, and the ends of the injection pipes 10 extend to the upper surface of the guide funnel 19.

[0055] Setting up multiple injection pipes 10 can improve the efficiency of filling the water tank 2 with wastewater. At the same time, the multiple injection pipes 10 are arranged in a circumferential array. When the wastewater is discharged from the injection pipes 10, the wastewater can form a vortex in the water tank 2 in advance, which concentrates the larger and heavier stains in the wastewater at the drain outlet 11. The rotation direction of the vortex formed by the wastewater is the same as the rotation direction of the multiple scrapers 7, which reduces the resistance of the scrapers 7 in pushing the wastewater to rotate, and also reduces the resistance of the drive component in driving the gear ring 6 to rotate.

[0056] Reference Figure 1 ,as well as Figure 5 - Figure 7The bottom of the guide groove 9 on each scraper 7 is higher than the upper surface of the water tank 2, and one end of each scraper 7 is provided with an arc-shaped guide plate 28. The upper surface of the guide plate 28 is flush with the inner surface of the guide groove 9, and the end of the guide plate 28 extends to the top of the drain outlet 5.

[0057] The end of the guide channel 9 on each scraper 7 near the drain outlet 5 is higher than the upper surface of the pool 2. This ensures that the waste can flow smoothly from the guide channel 9 into the drain outlet 5. At the same time, one end of each scraper 7 is provided with an arc-shaped guide plate 28. That is, the end of each scraper 7 near the drain outlet 5 is provided with an arc-shaped guide plate 28, which catches the last part of the waste flowing from the guide channel 9 into the drain outlet 5, and can accurately guide the waste into the drain outlet 5, preventing the waste from overflowing and flowing back into the pool 2.

[0058] Reference Figure 5 - Figure 7 Each of the aeration pipes 1 has an air outlet located away from one edge of the scraper 7 to which it is connected;

[0059] The exhaust direction of the air outlet on each aeration pipe 1 is opposite to the rotation direction of the scraper 7. After the air outlet 1 on the previous scraper 7 discharges air bubbles, the air bubbles adhere to the dirt and quickly float to the surface of the liquid. The scraper 7 that rotates next will scrape the dirt into the guide channel 9.

[0060] If the exhaust direction of the air outlet on each aeration pipe 1 is the same as the rotation direction of the scraper 7, when the air outlet 1 on the previous scraper 7 discharges air bubbles, the air bubbles adhere to the dirt. At this time, the dirt is still agitated by the air outlet 1 on the previous scraper 7, which separates the dirt from the air bubbles and affects the effect of the air bubbles adhering to the dirt.

[0061] Reference Figure 11 The bottom of the pool 2 is provided with a horizontal channel 29, which is connected to the drain outlet 11, and the sealing plate 12 is slidably connected in the channel 29.

[0062] The channel 29 runs through one side of the pool 2. The inner wall of the channel 29 is also provided with a sliding hole. The sliding hole is set away from the channel 29. A push-pull rod 30 is provided in the sliding hole. One end of the push-pull rod 30 is fixed to the sealing plate 12, and the other end of the push-pull rod 30 is fixed to a hydraulic cylinder. The hydraulic cylinder realizes the movement of the push-pull rod 30, thereby controlling the sealing plate 12 to block the drain outlet 11 and flexibly controlling the opening and closing of the drain outlet 11.

[0063] Reference Figure 8 The outer ring of the water tank 2 is provided with a main pipe 31, which is arranged in a ring shape and connected to multiple injection pipes 10;

[0064] The main pipe 31 connects to multiple injection pipes 10, allowing wastewater to be injected into the water tank 2 simultaneously from multiple injection pipes 10. This makes the wastewater pressure inside each injection pipe 10 tend to be the same. When the wastewater is discharged into the water tank 2, the vortex formed by the rotating wastewater tends to be stable, which helps the dirt to be concentrated and collected at the drain outlet 11.

[0065] Working principle: Wastewater is injected into the water tank 2 through the injection pipe 10 and the aeration device is driven. The aeration device is connected to the aeration pipe 1 and generates a large number of micro bubbles. After the wastewater is full, the injection is stopped and then the toothed ring 6 is driven to rotate. The toothed ring 6 synchronously drives multiple scrapers 7 to rotate around the axis of the support column 3. At the same time, the scrapers 7 also drive the support column 3 to rotate.

[0066] The bubbles generated by the aeration pipe 1 adhere to the dirt, causing the dirt to float on the surface of the wastewater. At the same time, multiple scrapers 7 rotate, and one edge of the scraper 7 scoops into the liquid below the surface. Due to the pushing force of the scraper 7 on the wastewater, the dirt flows into the guide channel 9 along the slope 8, and then flows along the guide channel 9 to the discharge port 5. Finally, it is discharged away through the discharge port 5, thus purifying the wastewater.

[0067] When the scraper 7 scrapes the dirt, the dirt flowing into the guide channel 9 can quickly flow into the drain outlet 5 according to the tilt angle of the guide channel 9. At the same time, the rotation of the scraper 7 generates centrifugal force, which throws the dirt in the guide channel 9 away and flows towards the drain outlet 5, which also helps the dirt to be discharged quickly.

[0068] As multiple scrapers 7 slowly rotate, they simultaneously push the wastewater, creating vortices within the wastewater. These vortices rotate slowly, insufficient to hinder the combination and buoyancy of aeration bubbles with impurities. The slowly rotating wastewater then gathers larger impurities or those too small to float to the surface, converging them at the drain outlet 11. That is, impurities that have sunk to the bottom of the pool 2 are gathered at the drain outlet 11. After wastewater purification is complete, the sealing plate 12 is opened, and the purified wastewater is discharged from the drain outlet 11. This allows for the rapid removal of impurities accumulated at the bottom of the pool 2. Simultaneously, a filter screen is installed at the drain outlet 11 to filter impurities, achieving multi-stage filtration of the wastewater. Specifically, aeration causes small impurities to float and be purified from the top of the pool 2, while the rotation of the scrapers 7 causes the wastewater to rotate, accumulating larger impurities at the bottom of the pool 2, which are then filtered and discharged at the bottom, resulting in more thorough wastewater purification.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wastewater purification device for plastic product processing, characterized in that: The device includes a water tank with an aeration pipe, a support column rotatably connected to the center of the water tank, a ring-shaped support body on the outer ring of the upper end of the water tank, multiple sewage outlets arranged in a circular array on the support body, a toothed ring rotatably connected to the outer edge of the upper end face of the support body, a drive component connected to the outer ring of the toothed ring to drive its rotation, multiple scrapers are arranged between the inner ring of the toothed ring and the support column, the toothed ring synchronously drives the multiple scrapers to rotate around the axis of the support column, and the scrapers also drive the support column to rotate, one edge of the scraper is provided with a slope, and one edge of the scraper is inclined towards the bottom of the water tank, and a guide groove is provided on the upper surface of the scraper, and the guide groove is inclined towards the sewage outlet; The bottom of the pool is equipped with an injection pipe, and a drain outlet is opened at the center of the bottom of the pool. The bottom of the support column is supported by a support rod at the drain outlet, and a sealing plate is provided below the drain outlet to seal the drain outlet. The upper end face of the support column is provided with an air supply pipe. Multiple exhaust holes are opened on the outer ring of the air supply pipe. A hollow ring is fitted on the outer ring of the air supply pipe. An air inlet is provided in the inner ring of the ring and communicates with the exhaust holes. Multiple branch pipes are provided on the outer ring of the ring. Each branch pipe extends to the top of the other edge of the scraper. A row of vertically downward aeration pipes is provided at the other edge of each scraper. The same row of aeration pipes is connected to the branch pipes above it. The bottom of the guide groove on each scraper is higher than the upper surface of the pool, and one end of each scraper is provided with an arc-shaped guide plate. The upper surface of the guide plate is flush with the inner surface of the guide groove, and the end of the guide plate extends above the drain outlet.

2. The wastewater purification device for plastic product processing according to claim 1, characterized in that: The bottom of the pool is provided with a guide funnel for collecting waste. The flared edge of the guide funnel is fixed to the inner wall of the pool, and the narrowed part of the guide funnel is fixed to the edge of the drain outlet.

3. The wastewater purification device for plastic product processing according to claim 1, characterized in that: Each of the aforementioned guide channels is rotatably connected to a spiral blade, and one end of each spiral blade is fixedly connected to a gear; The support body is provided with an end face toothed ring, which meshes with each gear; the spiral blade rotates around the axis of the support column with the scraper, the end face toothed ring rubs the gear to rotate, and drives the spiral blade to rotate.

4. The wastewater purification device for plastic product processing according to claim 2, characterized in that: The upper outer ring of the pool is equipped with a surrounding plate. The upper surface of the surrounding plate is fixed to the lower surface of the support body. The lower surface of the surrounding plate is sealed to the pool and is inclined. A sewage pipe is connected to the low-lying part of the lower end of the surrounding plate.

5. The wastewater purification device for plastic product processing according to claim 4, characterized in that: Multiple injection pipes are arranged in a circular array at the bottom of the water tank, with the ends of the injection pipes extending through to the upper surface of the guide funnel.

6. The wastewater purification device for plastic product processing according to claim 1, characterized in that: The air outlet on each of the aeration pipes is positioned away from one edge of the scraper to which it is connected.

7. The wastewater purification device for plastic product processing according to claim 5, characterized in that: A horizontal channel is provided at the bottom of the pool, which connects to the drain outlet, and a sealing plate is slidably connected within the channel.

8. The wastewater purification device for plastic product processing according to claim 5, characterized in that: The outer ring of the water tank is equipped with a main pipe, which is arranged in a ring shape and connected to multiple injection pipes.

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