A wastewater purification and recycling device and a production method of color imitation parchment paper

Abstract

The present application relates to wastewater treatment technical field, disclose a kind of wastewater purification recycling device, including purification box, the overall profile of purification box is circular arc, the bottom end of purification box is fixedly connected with arc filter plate, the side of purification box is fixedly connected with water inlet pipe, water inlet pipe is located above arc filter plate, the both sides of purification box are fixedly connected with filter-pressing storehouse body, the bottom of purification box is fixedly connected with collection box, the side of collection box is fixedly connected with water outlet pipe, the inside of purification box is provided with swing scraping assembly, by swing scraping assembly, drive screen scraper reciprocating swing along arc filter plate surface, the fiber of interception is continuously cleaned, prevent fiber from plugging filter hole, guarantee filtering efficiency, make arc filter plate surface always maintain good permeability, realize wastewater stable filtration, simultaneously fiber is orderly pushed to both sides filter-pressing storehouse body, create conditions for subsequent recovery.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a wastewater purification and reuse device and a method for producing colored imitation parchment paper. Background Technology

[0002] The production process of colored imitation parchment paper mainly includes pulping, dyeing, papermaking, impregnation, pressing, drying and calendering. Among them, the dyeing, impregnation and pressing processes generate a large amount of mixed wastewater containing fine fibers, dyes and chemical auxiliaries.

[0003] Wastewater purification and reuse equipment is installed between the sizing and molding processes or between the pressing and drying processes in the production line. It is used to collect and treat wastewater containing dyes and fine fibers generated during the production process. Through a multi-stage purification method combining physical filtration, chemical flocculation and biological adsorption, it effectively removes suspended solids, color and organic matter from the wastewater, so that the treated water quality meets the production reuse standards. This significantly reduces the consumption of fresh water and the discharge loss of dyes and auxiliaries. At the same time, it improves the color uniformity and fiber retention rate of colored imitation parchment paper, achieving the dual goals of water conservation, emission reduction and resource recycling.

[0004] When treating fine fibers in wastewater, existing technologies often use flat filter plates or cylindrical filter screens for physical interception. Wastewater is forced through the filter layer by gravity or external pressure, while the fibers are trapped on the surface of the filter media. To maintain filtration efficiency, manual cleaning at regular intervals or a simple scraper mechanism is usually used for unidirectional scraping to achieve regeneration and continuous use of the filter media.

[0005] In existing technologies, when treating fine fibers in wastewater, filter plates or cylindrical screens are typically used for physical interception. However, the fibers easily clog the filter pores quickly, leading to a significant decrease in filtration throughput. To maintain filtration efficiency, manual cleaning is often required periodically, which is cumbersome and affects continuous production. In addition, the wet fibers separated from the wastewater have a high moisture content, and additional dewatering equipment is needed after the fibers are separated from the wastewater. This results in frequent material transfers, making it difficult to form a continuous and compact integrated operation with the filtration process, thus affecting wastewater treatment efficiency.

[0006] Therefore, the present invention provides a wastewater purification and reuse device and a method for producing colored imitation parchment paper. Summary of the Invention

[0007] To overcome the shortcomings of the prior art: to solve at least one technical problem raised in the background art.

[0008] The technical solution adopted by the present invention to solve its technical problem is as follows: The wastewater purification and reuse device of the present invention includes a purification box, the overall outline of which is arc-shaped. An arc-shaped filter plate is fixedly connected to the bottom of the purification box. A water inlet pipe is fixedly connected to the side of the purification box and is located above the arc-shaped filter plate. Filter press chambers are symmetrically fixedly connected to both sides of the purification box. A collection box is fixedly connected to the bottom of the purification box. A water outlet pipe is fixedly connected to one side of the collection box. A swing scraping assembly is provided inside the purification box. The swing scraping assembly includes a screen scraper. One end of the screen scraper is attached to the inner wall of the purification box. The screen scraper can continuously clean the fibers on the surface of the arc-shaped filter plate by repeated swinging. Back scraping assemblies are provided on both sides of the screen scraper. Each back scraping assembly includes an arc-shaped back scraper that can move along the surface of the screen scraper. Filter press chambers are provided inside each chamber for squeezing and dewatering the fibers.

[0009] Preferably, the oscillating scraper assembly also includes a motor, which is fixedly installed on the outer wall of the purification chamber. The output shaft of the motor is fixedly connected to a main rotating shaft, which is rotatably connected to the interior of the purification chamber. A oscillating rod is fixedly connected to the outer wall of the main rotating shaft, and one end of the oscillating rod is fixedly connected to the end of the screen scraper away from the purification chamber.

[0010] Preferably, each of the back-scraping components also includes a pair of guide rods, which are respectively fixedly connected to the top of the screen scraper. The inner walls of the arc-shaped back-scraping blades are slidably connected to and adapted to the screen scraper. The tips of the two arc-shaped back-scraping blades are respectively attached to the two sides of the screen scraper. A clamping shaft is fixedly connected to one side of the screen scraper. A rotating shaft is rotatably connected to the inner walls of both ends of the clamping shaft. A gear is fixedly connected to both ends of the rotating shaft. A rack plate is symmetrically fixedly connected to the top of each arc-shaped back-scraping blade. The gear can mesh with the teeth of the rack plate. Gear assemblies that can drive the gear to rotate are provided on both sides of the inside of the purification box.

[0011] Preferably, the gear assembly includes two sets of arc-shaped toothed plates, which are respectively fixedly connected to the inner walls on both sides of the purification chamber, and the teeth of the two sets of arc-shaped toothed plates can mesh with the teeth of the two sets of gears.

[0012] Preferably, discharge ports are provided on both sides of the purification chamber, and arc-shaped grooves are provided inside both sides of the purification chamber. Arc-shaped baffles are slidably connected to the inner walls of the arc-shaped grooves. Protrusions are fixedly connected to the inner surfaces of the arc-shaped baffles, and springs are fixedly connected to the sides of the arc-shaped baffles. One end of the springs is fixedly connected to the inner wall of the arc-shaped grooves. The two filter press chambers are respectively in contact with and connected to the two discharge ports.

[0013] Preferably, each filter press assembly includes a bearing housing, which is fixedly connected to the inner wall of the filter press chamber. A filter press plate is fixedly connected to the outer wall of the bearing housing shaft, and a flow guide plate is fixedly connected to the outer wall of the filter press chamber. A transmission assembly for driving the bearing housing shaft to rotate is provided between the arc-shaped baffle and the bearing housing shaft. A suction pump is fixedly installed on the top of the purification chamber, and suction pipes are fixedly connected to both ends of the suction pump. The end of the suction pipe away from the suction pump is fixedly connected to the top of the filter press chamber. A recovery box is provided outside the suction pipe.

[0014] Preferably, each transmission component includes an arc-shaped guide rod seat, which is fixedly connected to the outer wall of the diversion plate. An arc-shaped toothed plate II is slidably connected to the outer wall of the guide rod of the arc-shaped guide rod seat. A gear II is fixedly connected to one end of the shaft of the bearing seat. The teeth of the arc-shaped toothed plate II can mesh with the teeth of the gear II.

[0015] Preferably, a side plate is fixedly connected to one side of the arc-shaped toothed plate II, a connecting rod is fixedly connected to one side of the side plate, a telescopic rod is fixedly connected to one end of the connecting rod, a push ball is fixedly connected to the output end of the telescopic rod, the push ball is located on one side of the side plate, and a spring II is fixedly connected between one side of the arc-shaped toothed plate II and the inner wall of the arc-shaped guide rod seat.

[0016] A wastewater purification and reuse device is provided, and a method for producing colored imitation parchment paper adapted to the device is proposed, comprising the following steps: S1: Pulping and dyeing: Pulping the paper fibers and adding dyes to obtain colored pulp; S2: Sizing and Forming: The colored paste and sizing agent are mixed and then fed into the forming process to form a wet paper web; S3: Wastewater collection and purification: Collect mixed wastewater containing fibers and dyes generated during the sizing and molding processes, and pass it into a wastewater purification and reuse device for treatment; S4: Resource Recycling and Fiber Recovery: The wastewater purified by filtration in the wastewater purification and reuse device is transported back to the pulping or dilution process for recycling. At the same time, the fiber blocks formed after dewatering by pressure filtration inside the device are collected and reused in the pulping process or transported for disposal. S5: Post-processing and forming: The wet paper web formed in S2 is sequentially pressed, dried, calendered and wound to finally obtain the colored imitation parchment paper finished product.

[0017] A method for producing colored imitation parchment paper includes the following steps: Y1: Wastewater filtration: Wastewater enters the purification chamber through the inlet pipe, is filtered through the arc-shaped filter plate, and the clean water flows into the collection box, while the fibers are intercepted on the surface of the arc-shaped filter plate. Y2: Swinging scraper: The motor drives the main shaft and swing arm to swing back and forth, causing the screen scraper to swing left and right along the surface of the arc-shaped filter plate, pushing the intercepted fibers to both sides; Y3: Back scraping and pushing: When the screen scraper swings to the filter press chamber, the gear assembly drives the gear to rotate, which drives the rack plate and the arc-shaped back scraper to move along the surface of the screen scraper, pushing the fibers into the filter press chamber; Y4: Opening and closing of discharge: When the screen scraper swings, the guide rod pushes the protrusion, which drives the arc-shaped baffle to slide along the arc-shaped groove and open the discharge port; after the screen scraper leaves, the spring drives the arc-shaped baffle to reset and close. Y5: Filter press dewatering: When the arc-shaped baffle is reset, the transmission component drives the arc-shaped toothed plate two to slide, driving the gear two and bearing seat to rotate, so that the filter press plate squeezes the fiber to dewater. The wastewater flows into the collection box through the diversion plate, and the suction pump sucks the residual water to the recovery box. The dewatered fiber block is left to be cleaned.

[0018] The beneficial effects of this invention are as follows: 1. The present invention discloses a method for producing colored imitation parchment paper, which uses a swinging scraper assembly to drive the screen scraper to swing back and forth along the surface of the arc-shaped filter plate, continuously cleaning the intercepted fibers, preventing the fibers from clogging the filter holes, ensuring filtration efficiency, keeping the surface of the arc-shaped filter plate always with good permeability, achieving stable filtration of wastewater, and at the same time pushing the fibers orderly to both sides of the filter press chamber, creating conditions for subsequent recycling.

[0019] 2. The method for producing colored imitation parchment paper according to the present invention uses a reverse scraping assembly. When the screen scraper swings away from the surface of the arc-shaped filter plate and swings to the filter press chambers on both sides, it triggers the arc-shaped reverse scraper to move along the surface of the screen scraper, thoroughly scraping off the fibers stuck on it and pushing them into the filter press chamber. This avoids the repeated accumulation or re-carrying of fibers on the screen scraper, ensuring that the fibers are completely transferred to the filter press chamber, improving the fiber collection rate and the thoroughness of cleaning.

[0020] 3. The method for producing colored imitation parchment paper according to the present invention uses a filter press assembly to squeeze and dehydrate the wet fibers entering the filter press chamber, separate the residual wastewater in the fibers, reduce the moisture content of the fibers, and facilitate subsequent centralized collection, treatment or reuse. At the same time, the squeezed water flows back to the collection box and is reused in production together with the wastewater filtered by the arc-shaped filter plate through the water outlet pipe, realizing the dual recovery of water resources and fiber resources. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a schematic diagram of the internal structure of the purification chamber in this invention; Figure 3 This is a schematic diagram of the structure of the screen scraper in this invention; Figure 4 This is a schematic diagram of the structure of the arc-shaped anti-scraper in this invention; Figure 5 This is the present invention. Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the structure of the arc-shaped baffle in this invention; Figure 7 This is a schematic diagram of the structure of the filter plate in this invention; Figure 8 This is a schematic diagram of the ball-pushing structure in this invention; Figure 9 This is a schematic diagram of the structure of two arc-shaped toothed plates in this invention; Figure 10 This is a schematic diagram of the structure of the drainage plate in this invention.

[0023] In the diagram: 1. Purification chamber; 2. Arc-shaped filter plate; 3. Inlet pipe; 4. Screen scraper; 5. Arc-shaped reverse scraper; 6. Filter press chamber; 7. Collection box; 8. Main shaft; 9. Swing rod; 10. Motor; 11. Clamping shaft; 12. Shaft; 13. Gear 1; 14. Arc-shaped toothed plate 1; 15. Rack plate; 16. Guide rod; 17. Discharge port; 18. Arc-shaped baffle; 19. Protrusion; 20. Arc-shaped chute; 21. Spring 1; 22. Bearing seat; 23. Filter press plate; 24. Drainage plate; 25. Gear 2; 26. Arc-shaped toothed plate 2; 27. Arc-shaped guide rod seat; 28. Side plate; 29. ​​Connecting rod; 30. Telescopic rod; 31. Push ball; 32. Spring 2; 33. Suction pipe; 34. Suction pump; 35. Recovery chamber; 36. Outlet pipe. Detailed Implementation

[0024] 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.

[0025] like Figures 1 to 10As shown, the present invention provides a technical solution: a wastewater purification and reuse device, including a purification chamber 1, the overall outline of the purification chamber 1 being arc-shaped, an arc-shaped filter plate 2 fixedly connected to the bottom end of the purification chamber 1, an inlet pipe 3 fixedly connected to the side of the purification chamber 1, the inlet pipe 3 being located above the arc-shaped filter plate 2, filter press chambers 6 symmetrically fixedly connected to both sides of the purification chamber 1, a collection box 7 fixedly connected to the bottom of the purification chamber 1, an outlet pipe 36 fixedly connected to one side of the collection box 7, a swing scraping assembly inside the purification chamber 1, the swing scraping assembly including a screen scraper 4, one end of the screen scraper 4 being attached to the inner wall of the purification chamber 1, the screen scraper 4 being able to continuously clean the fibers on the surface of the arc-shaped filter plate 2 by repeated swinging, a back scraping assembly being provided on both sides of the screen scraper 4, the back scraping assembly including an arc-shaped back scraper 5 that can move along the surface of the screen scraper 4, and a filter press assembly for squeezing and dewatering the fibers being provided inside the filter press chambers 6.

[0026] During operation: In the production process of colored imitation parchment paper, after pulping, dyeing, sizing and forming, a large amount of mixed wastewater containing fine fibers, dyes and chemical auxiliaries will be generated. The wastewater is introduced into the purification chamber 1 through the water inlet pipe 3. Since the overall outline of the purification chamber 1 is arc-shaped, the wastewater will naturally gather at the arc-shaped filter plate 2 and pass through the filter holes of the arc-shaped filter plate 2 under the action of gravity. The surface of the arc-shaped filter plate 2 will gradually intercept and accumulate fine fibers. During wastewater filtration, the oscillating scraper assembly begins to move. One end of the screen scraper 4 oscillates along the inner wall of the purification chamber 1. The screen scraper 4 first oscillates to the left, and then moves along the surface of the arc-shaped filter plate 2, pushing the fibers intercepted on the surface of the arc-shaped filter plate 2 towards the left side of the purification chamber 1. The fibers remain on one side of the screen scraper 4. Since the inner wall of the screen scraper 4 is also equipped with multiple filter holes, the wastewater being filtered will not be carried away by the screen scraper 4. When the screen scraper 4 oscillates to near the left filter press chamber 6, the back scraping assembly is triggered and begins to operate. One of the arc-shaped back scrapers 5 moves along the side of the screen scraper 4 where the fibers remain, gradually pushing the fibers into the interior of the left filter press chamber 6 during the movement. When the screen scraper 4 oscillates to the left limit position inside the purification chamber 1, the screen scraper 4 reverses direction and continues to oscillate towards the right side inside the purification chamber 1. The intercepted fibers will continue to be pushed towards the right filter chamber 6 along the surface of the arc-shaped filter plate 2. The fibers will also remain on the other side of the screen scraper 4. When the screen scraper 4 swings to near the right filter chamber 6, the right-side back scraping component is triggered. The corresponding arc-shaped back scraper 5 moves along the side where the fibers remain on the screen scraper 4, pushing the fibers into the right filter chamber 6. This back-and-forth swinging continues, and the screen scraper 4 alternately cleans the fibers on the surface of the arc-shaped filter plate 2 on both sides, and sends the collected fibers into the left and right filter chambers 6 respectively. At the same time, the filter pressing component inside the filter chamber 6 squeezes and dehydrates the fibers. The wastewater filtered by the arc-shaped filter plate 2 will flow into the collection box 7, while the squeezed wastewater will flow back to the bottom of the purification box 1 and flow into the collection box 7. Finally, it will be discharged through the outlet pipe 36 and reused in production. The dehydrated flocculent fibers are collected for subsequent treatment or reuse. In the above embodiments, the oscillating scraping assembly drives the screen scraper 4 to oscillate back and forth along the surface of the arc-shaped filter plate 2, continuously cleaning the intercepted fibers, preventing fiber blockage of the filter holes, ensuring filtration efficiency, and maintaining good permeability on the surface of the arc-shaped filter plate 2 to achieve stable wastewater filtration. Simultaneously, it orderly pushes the fibers to the two side filter press chambers 6, creating conditions for subsequent recycling. Through the reverse scraping assembly, when the screen scraper 4 oscillates away from the surface of the arc-shaped filter plate 2 and oscillates to the two side filter press chambers 6, it triggers the arc-shaped reverse scraper 5 to move along the surface of the screen scraper 4, removing the fibers trapped on it. The fibers are thoroughly scraped off and pushed into the filter press chamber 6, preventing the fibers from repeatedly accumulating or being carried back on the screen scraper 4. This ensures that the fibers are completely transferred to the filter press chamber 6, improving the fiber collection rate and the thoroughness of cleaning. Through the filter press assembly, the wet fibers entering the filter press chamber 6 are squeezed and dehydrated, separating the residual wastewater in the fibers and reducing the moisture content of the fibers. This facilitates subsequent centralized collection, treatment, or reuse. At the same time, the squeezed-out water flows back to the collection box 7 and is reused in production along with the wastewater filtered by the arc-shaped filter plate 2 through the water outlet pipe 36, achieving dual recovery of water and fiber resources.

[0027] like Figures 2 to 3 As shown, the oscillating scraper assembly also includes a motor 10, which is fixedly installed on the outer wall of the purification chamber 1. The output shaft of the motor 10 is fixedly connected to a main rotating shaft 8, which is rotatably connected to the interior of the purification chamber 1. A swaying rod 9 is fixedly connected to the outer wall of the main rotating shaft 8, and one end of the swaying rod 9 is fixedly connected to the end of the screen scraper 4 away from the purification chamber 1.

[0028] During operation: After the motor 10 starts, its output shaft drives the main rotating shaft 8 to rotate alternately in both directions inside the purification chamber 1. When the main rotating shaft 8 rotates, it drives the rocker arm 9 fixedly connected to its outer wall to swing synchronously. The swing of the rocker arm 9 will drive one end of the screen scraper 4 to swing along the inner wall of the purification chamber 1. When the main rotating shaft 8 rotates to the left, the rocker arm 9 drives the screen scraper 4 to swing to the left. The screen scraper 4 moves along the surface of the arc-shaped filter plate 2 and pushes the intercepted fibers to the left. When the screen scraper 4 reaches the left limit position, the motor 10 rotates in the opposite direction, and the main rotating shaft 8 drives the rocker arm 9 to rotate to the right. The screen scraper 4 then swings to the right, similarly pushing the fibers to the right. In this way, through the periodic forward and reverse rotation of the motor 10, the screen scraper 4 can continuously swing back and forth between the left and right sides to complete the uninterrupted cleaning of the surface of the arc-shaped filter plate 2.

[0029] like Figures 3 to 6 As shown, each of the back scraping components also includes a pair of guide rods 16. The two pairs of guide rods 16 are respectively fixedly connected to the top of the screen scraper 4. The inner walls of the arc-shaped back scraper 5 are slidably connected to and adapted to the screen scraper 4. The tips of the two arc-shaped back scrapers 5 are respectively attached to the two sides of the screen scraper 4. A clamping shaft 11 is fixedly connected to one side of the screen scraper 4. A rotating shaft 12 is rotatably connected to the inner walls of both ends of the clamping shaft 11. A gear 13 is fixedly connected to both ends of the rotating shaft 12. A rack plate 15 is symmetrically fixedly connected to the top of each arc-shaped back scraper 5. The gear 13 can mesh with the teeth of the rack plate 15. Gear assemblies that can drive the gear 13 to rotate are provided on both sides of the interior of the purification box 1.

[0030] During operation: The screen scraper 4 passes over the surface of the arc-shaped filter plate 2 and continues to swing to the left along the inside of the purification chamber 1. When it is about to swing to the left side of the filter press chamber 6, the gear assembly is triggered, causing one set of gears 13 to start rotating. When this set of gears 13 rotates, it will drive the rack plate 15 that meshes with it to move. When the rack plate 15 moves, it drives the corresponding arc-shaped reverse scraper 5 to move along the side of the screen scraper 4 that collects fibers. During the movement, the inner wall of the arc-shaped reverse scraper 5 slides along the guide rod 16 that is fixedly connected to the top of the screen scraper 4. The guide rod 16 limits and guides the movement direction of the arc-shaped reverse scraper 5 to ensure its smooth movement, thereby gradually scraping away the fibers stuck on the surface and pushing them into the interior of the left filter press chamber 6. Similarly, when the screen scraper 4 swings to the right and is about to approach the right filter press chamber 6, the gear assembly on the other side drives the corresponding gear 13 to rotate, driving the other set of rack plates 15 and arc-shaped reverse scraper 5 to move. The arc-shaped reverse scraper 5 also slides along the corresponding guide rod 16, pushing the fibers collected on the other side of the screen scraper 4 into the right filter press chamber 6.

[0031] like Figures 5 to 6 As shown, the gear assembly includes two sets of arc-shaped toothed plates 14, which are fixedly connected to the inner walls on both sides of the purification chamber 1. The teeth of the two sets of arc-shaped toothed plates 14 can mesh with the teeth of the two sets of gears 13 respectively.

[0032] During operation: When the screen scraper 4 swings to the left and is about to approach the left filter press chamber 6, one set of gears 13 gradually approaches the arc-shaped toothed plate 14 on the inner left side of the purification chamber 1. When the teeth of gear 13 and arc-shaped toothed plate 14 begin to mesh, as the screen scraper 4 continues to swing to the left, gear 13 is forced to rotate under the drive of arc-shaped toothed plate 14. When gear 13 rotates, it drives the rack plate 15 that meshes with it to move. The rack plate 15 then drives the corresponding arc-shaped reverse scraper 5 to move along the side of the screen scraper 4 where the fibers are collected, thereby removing the fibers from the screen scraper 4. The fibers are pushed into the left filter press chamber 6. Similarly, when the screen scraper 4 swings to the right and is about to approach the right filter press chamber 6, another set of gears 13 meshes with the arc-shaped toothed plate 14 on the inner wall of the right side of the purification chamber 1 and is also driven to rotate, thereby triggering the right arc-shaped reverse scraper 5 to move along the other side surface of the screen scraper 4 and push the fibers into the right filter press chamber 6. When the screen scraper 4 swings away from the limit position and returns, the gears 13 and the arc-shaped toothed plate 14 mesh in the opposite direction, and the arc-shaped reverse scraper 5 moves in the opposite direction to reset, waiting for the next swing trigger.

[0033] like Figures 6 to 7As shown, discharge ports 17 are provided on both sides of the purification chamber 1, and arc-shaped grooves 20 are provided inside both sides of the purification chamber 1. Arc-shaped baffles 18 are slidably connected to the inner walls of the arc-shaped grooves 20. Protrusions 19 are fixedly connected to the inner surfaces of the arc-shaped baffles 18. Springs 21 are fixedly connected to the sides of the arc-shaped baffles 18. One end of the springs 21 is fixedly connected to the inner wall of the arc-shaped grooves 20. The two filter press chambers 6 are respectively connected to the two discharge ports 17.

[0034] During operation: In the initial state, the arc-shaped baffle 18 blocks the discharge port 17 to prevent unfiltered wastewater from flowing directly into the filter press chamber 6. When the screen scraper 4 swings to the left side of the filter press chamber 6, the guide rod 16 will push against the outer wall of the protrusion 19, causing the arc-shaped baffle 18 to slide along the inner wall of the arc-shaped groove 20 and compress the spring 21, causing it to deform. This gradually opens the discharge port 17. At this time, the arc-shaped reverse scraper 5 moves along the surface of the screen scraper 4, thereby enabling... The fiber is smoothly pushed into the discharge port 17 and enters the left filter press chamber 6. Similarly, when the screen scraper 4 swings to the right filter press chamber 6, the right guide rod 16 pushes open the right arc baffle 18, opening the right discharge port 17. The right arc reverse scraper 5 then pushes the fiber into the right filter press chamber 6. When the screen scraper 4 swings away in the opposite direction, the guide rod 16 disengages from the protrusion 19, and the spring 21 rebounds, causing the arc baffle 18 to reset and re-seal the discharge port 17.

[0035] like Figures 7 to 10 As shown, each filter press assembly includes a bearing seat 22, which is fixedly connected to the inner wall of the filter press chamber 6. Filter press plates 23 are fixedly connected to the outer wall of the shaft of the bearing seat 22. A flow guide plate 24 is fixedly connected to the outer wall of the filter press chamber 6. A transmission assembly for driving the shaft of the bearing seat 22 to rotate is provided between the arc-shaped baffle 18 and the shaft of the bearing seat 22. A suction pump 34 is fixedly installed on the top of the purification chamber 1. Suction pipes 33 are fixedly connected to both ends of the suction pump 34. The end of the suction pipe 33 away from the suction pump 34 is fixedly connected to the top of the filter press chamber 6. A recovery box 35 is provided outside the suction pipe 33.

[0036] During operation: When the screen scraper 4 swings to the left and drives the arc-shaped baffle 18 to slide along the inner wall of the arc-shaped chute 20, gradually opening the discharge port 17, the fibers on the surface of the screen scraper 4 are pushed into the left filter press chamber 6 by the arc-shaped reverse scraper 5; when the screen scraper 4 rotates away in the opposite direction, the arc-shaped baffle 18 slides in the opposite direction under the elastic force of the spring 21, closing the discharge port 17 again. During this process, the transmission assembly drives the shaft of the bearing seat 22 to rotate, thereby driving the filter press plate 23 to rotate around the shaft of the bearing seat 22. When the filter press plate 23 rotates... The filter press moves closer to the inner wall of the filter press chamber 6, causing the water-containing fibers to be squeezed between the filter press plate 23 and the filter press chamber 6. During the squeezing process, the wastewater in the fibers is discharged through the filter holes of the filter press plate 23 and flows into the collection box 7 along the guide plate 24 for collection. When the screen scraper 4 swings to the right, its working principle is the same as that on the left. At the same time, the suction pump 34 sucks the top of the filter press chamber 6 through the suction pipe 33 to extract the residual water and humid air generated during the squeezing process and transport them to the recovery box 35. The dehydrated fiber blocks are left in the filter press chamber 6 for subsequent cleaning.

[0037] like Figures 7 to 9 As shown, each transmission component includes an arc-shaped guide rod seat 27, which is fixedly connected to the outer wall of the diversion plate 24. An arc-shaped toothed plate 26 is slidably connected to the outer wall of the guide rod of the arc-shaped guide rod seat 27. A gear 25 is fixedly connected to one end of the shaft of the bearing seat 22. The teeth of the arc-shaped toothed plate 26 can mesh with the teeth of the gear 25.

[0038] During operation: When the arc-shaped baffle 18 slides in the opposite direction to close the discharge port 17 again, it will drive the arc-shaped toothed plate 26 to slide along the guide rod of the arc-shaped guide rod seat 27. When the arc-shaped toothed plate 26 slides, its teeth drive the gear 25 meshing with it to rotate. The gear 25 then drives the shaft of the bearing seat 22 to rotate synchronously, thereby causing the filter press plate 23 to rotate towards the inner wall of the filter press chamber 6 to squeeze and dewater the fibers.

[0039] like Figures 8 to 9 As shown, a side plate 28 is fixedly connected to one side of the arc-shaped toothed plate 26, a connecting rod 29 is fixedly connected to one side of the side plate 28, a telescopic rod 30 is fixedly connected to one end of the connecting rod 29, a push ball 31 is fixedly connected to the output end of the telescopic rod 30, the push ball 31 is located on one side of the side plate 28, and a spring 32 is fixedly connected between one side of the arc-shaped toothed plate 26 and the inner wall of the arc-shaped guide rod seat 27.

[0040] During operation: When the arc-shaped baffle 18 slides along the inner wall of the arc-shaped groove 20, opening the discharge port 17, the sliding of the arc-shaped baffle 18 will drive the telescopic rod 30 and the push ball 31 to move together via the connecting rod 29. At this time, the telescopic rod 30 is in a retracted state, and the push ball 31 will not contact the side plate 28. When the arc-shaped baffle 18 slides back to its original position, closing the discharge port 17, the telescopic rod 30 extends, pushing the push ball 31 towards the side plate 28. As the arc-shaped baffle 18 continues to slide back to its original position, the push ball 31 can contact the side of the side plate 28 and push the arc-shaped groove 28. The second toothed plate 26 slides along the guide rod of the arc-shaped guide rod seat 27. When the second toothed plate 26 slides, it drives the gear 25 meshing with it to rotate. The gear 25 drives the shaft of the bearing seat 22 to rotate, thereby causing the filter press plate 23 to squeeze and dewater the fibers. When the second toothed plate 26 slides, it will squeeze the second spring 32 to deform. When the second toothed plate 26 slides to the limit position, the telescopic rod 30 retracts, and the push ball 31 disengages from the side plate 28. At this time, the second toothed plate 26 slides back to its original position under the elastic force of the second spring 32, so that the filter press plate 23 returns to its initial state.

[0041] A wastewater purification and reuse device is provided, and a method for producing colored imitation parchment paper adapted to the device is proposed, comprising the following steps: S1: Pulping and dyeing: Pulping the paper fibers and adding dyes to obtain colored pulp; S2: Sizing and Forming: The colored paste and sizing agent are mixed and then fed into the forming process to form a wet paper web; S3: Wastewater collection and purification: Collect mixed wastewater containing fibers and dyes generated during the sizing and molding processes, and pass it into a wastewater purification and reuse device for treatment; S4: Resource Recycling and Fiber Recovery: The wastewater purified by filtration in the wastewater purification and reuse device is transported back to the pulping or dilution process for recycling. At the same time, the fiber blocks formed after dewatering by pressure filtration inside the device are collected and reused in the pulping process or transported for disposal. S5: Post-processing and forming: The wet paper web formed in S2 is sequentially pressed, dried, calendered and wound to finally obtain the colored imitation parchment paper finished product.

[0042] A method for producing colored imitation parchment paper includes the following steps: Y1: Wastewater filtration: Wastewater enters the purification chamber 1 through the inlet pipe 3, is filtered through the arc-shaped filter plate 2, and the clean water flows into the collection box 7. The fibers are intercepted on the surface of the arc-shaped filter plate 2. Y2: Swing scraper: Motor 10 drives the main shaft 8 and swing rod 9 to swing back and forth, causing the screen scraper 4 to swing left and right along the surface of the arc-shaped filter plate 2, pushing the intercepted fibers to both sides; Y3: Back scraping and pushing: When the screen scraper 4 swings to the filter press chamber 6, the gear assembly drives the gear 13 to rotate, driving the rack plate 15 and the arc-shaped back scraper 5 to move along the surface of the screen scraper 4, pushing the fiber into the filter press chamber 6. Y4: Opening and closing of discharge: When the screen scraper 4 swings, the guide rod 16 pushes the protrusion 19, which drives the arc baffle 18 to slide along the arc groove 20 and open the discharge port 17; after the screen scraper 4 leaves, the spring 21 drives the arc baffle 18 to reset and close. Y5: Filter press dewatering: When the arc-shaped baffle 18 is reset, the arc-shaped toothed plate 26 is driven to slide through the transmission component, which drives the gear 25 and the bearing seat 22 to rotate, so that the filter press plate 23 squeezes the fiber to dewater. The wastewater flows into the collection box 7 through the diversion plate 24, and the suction pump 34 sucks the residual water to the recovery box 35. The dewatered fiber block is left to be cleaned.

[0043] 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 and recycling device comprising a purification tank, characterized in that: The overall outline of the purification chamber is arc-shaped. An arc-shaped filter plate is fixedly connected to the bottom of the purification chamber. A water inlet pipe is fixedly connected to the side of the purification chamber and is located above the arc-shaped filter plate. Filter press chambers are symmetrically fixedly connected to both sides of the purification chamber. A collection box is fixedly connected to the bottom of the purification chamber, and a water outlet pipe is fixedly connected to one side of the collection box. A swing scraping assembly is set inside the purification chamber. The swing scraping assembly includes a screen scraper. One end of the screen scraper is attached to the inner wall of the purification chamber. The screen scraper can continuously clean the fibers on the surface of the arc-shaped filter plate by repeated swinging. Back scraping assemblies are set on both sides of the screen scraper. Each back scraping assembly includes an arc-shaped back scraper that can move along the surface of the screen scraper. Filter press chambers are set inside each chamber to squeeze and dewater the fibers.

2. The device for purifying and recycling wastewater according to claim 1, characterized in that: The oscillating scraper assembly also includes a motor, which is fixedly installed on the outer wall of the purification chamber. The output shaft of the motor is fixedly connected to a main rotating shaft, which is rotatably connected to the interior of the purification chamber. A oscillating rod is fixedly connected to the outer wall of the main rotating shaft, and one end of the oscillating rod is fixedly connected to the end of the screen scraper away from the purification chamber.

3. The device according to claim 2, wherein: Each back-scraping assembly also includes a pair of guide rods, which are fixedly connected to the top of the screen scraper. The inner walls of the arc-shaped back-scraping plates are slidably connected to and adapted to the screen scraper. The tips of the two arc-shaped back-scraping plates are respectively attached to the two sides of the screen scraper. A clamping shaft is fixedly connected to one side of the screen scraper. A rotating shaft is rotatably connected to the inner walls of both ends of the clamping shaft. Gear 1 is fixedly connected to both ends of the rotating shaft. A rack plate is symmetrically fixedly connected to the top of each arc-shaped back-scraping plate. Gear 1 can mesh with the teeth of the rack plate. Gear assemblies that can drive gear 1 to rotate are provided on both sides of the inside of the purification box.

4. The device for purifying and reusing wastewater according to claim 3, characterized in that: The gear assembly includes two sets of arc-shaped gear plates, which are fixedly connected to the inner walls on both sides of the purification chamber. The teeth of the two sets of arc-shaped gear plates can mesh with the teeth of the two sets of gears.

5. The device for purifying and reusing wastewater according to claim 4, characterized in that: Both sides of the purification chamber have discharge ports, and both sides of the purification chamber have arc-shaped grooves. The inner walls of the arc-shaped grooves are slidably connected to arc-shaped baffles. The inner surfaces of the arc-shaped baffles are fixedly connected to protrusions, and the sides of the arc-shaped baffles are fixedly connected to springs. One end of the springs is fixedly connected to the inner wall of the arc-shaped grooves. The two filter press chambers are respectively connected to the two discharge ports.

6. The device for purifying and reusing wastewater according to claim 5, characterized in that: Each filter press assembly includes a bearing housing, which is fixedly connected to the inner wall of the filter press chamber. Filter press plates are fixedly connected to the outer wall of the bearing housing shaft, and a flow guide plate is fixedly connected to the outer wall of the filter press chamber. A transmission assembly that drives the bearing housing shaft to rotate is provided between the arc-shaped baffle and the bearing housing shaft. A suction pump is fixedly installed on the top of the purification chamber, and suction pipes are fixedly connected to both ends of the suction pump. The end of the suction pipe away from the suction pump is fixedly connected to the top of the filter press chamber. A recovery box is provided outside each suction pipe.

7. The wastewater purification and reuse device according to claim 6, characterized in that: All transmission components include arc-shaped guide rod seats, which are fixedly connected to the outer wall of the diversion plate. Arc-shaped toothed plates are slidably connected to the outer wall of the guide rod of the arc-shaped guide rod seat. One end of the shaft of the bearing seat is fixedly connected to a gear, and the teeth of the arc-shaped toothed plates can mesh with the teeth of the gears.

8. The wastewater purification and reuse device according to claim 7, characterized in that: A side plate is fixedly connected to one side of the arc-shaped toothed plate II. A connecting rod is fixedly connected to one side of the side plate. A telescopic rod is fixedly connected to one end of the connecting rod. A push ball is fixedly connected to the output end of the telescopic rod. The push ball is located on one side of the side plate. A spring II is fixedly connected between one side of the arc-shaped toothed plate II and the inner wall of the arc-shaped guide rod seat.

9. A wastewater purification and reuse device according to any one of claims 1-8 is hereby proposed, along with a method for producing colored imitation parchment paper adapted to the device. Includes the following steps, characterized in that: S1: Pulping and dyeing: Pulping the paper fibers and adding dyes to obtain colored pulp; S2: Sizing and Forming: The colored paste and sizing agent are mixed and then fed into the forming process to form a wet paper web; S3: Wastewater collection and purification: Collect mixed wastewater containing fibers and dyes generated during the sizing and molding processes, and pass it into a wastewater purification and reuse device for treatment; S4: Resource Recycling and Fiber Recovery: The wastewater purified by filtration in the wastewater purification and reuse device is transported back to the pulping or dilution process for recycling. At the same time, the fiber blocks formed after dewatering by pressure filtration inside the device are collected and reused in the pulping process or transported for disposal. S5: Post-processing and forming: The wet paper web formed in S2 is sequentially pressed, dried, calendered and wound to finally obtain the colored imitation parchment paper finished product.

10. A method for producing colored imitation parchment paper according to claim 9, comprising the following steps, characterized in that: Y1: Wastewater filtration: Wastewater enters the purification chamber through the inlet pipe, is filtered through the arc-shaped filter plate, and the clean water flows into the collection box, while the fibers are intercepted on the surface of the arc-shaped filter plate. Y2: Swinging scraper: The motor drives the main shaft and swing arm to swing back and forth, causing the screen scraper to swing left and right along the surface of the arc-shaped filter plate, pushing the intercepted fibers to both sides; Y3: Back scraping and pushing: When the screen scraper swings to the filter press chamber, the gear assembly drives the gear to rotate, which drives the rack plate and the arc-shaped back scraper to move along the surface of the screen scraper, pushing the fibers into the filter press chamber; Y4: Opening and closing of discharge: When the screen scraper swings, the guide rod pushes the protrusion, which drives the arc-shaped baffle to slide along the arc-shaped groove and open the discharge port; after the screen scraper leaves, the spring drives the arc-shaped baffle to reset and close. Y5: Filter press dewatering: When the arc-shaped baffle is reset, the transmission component drives the arc-shaped toothed plate two to slide, driving the gear two and bearing seat to rotate, so that the filter press plate squeezes the fiber to dewater. The wastewater flows into the collection box through the diversion plate, and the suction pump sucks the residual water to the recovery box. The dewatered fiber block is left to be cleaned.

Images