A kind of waste water treatment equipment containing glue for impregnated paper production

Abstract

The application relates to the technical field of impregnated paper production wastewater treatment, and discloses a glue-containing wastewater treatment equipment for impregnated paper production. The equipment comprises a glue separation reaction cylinder, the glue separation reaction cylinder is provided with a water inlet pipe and a water outlet pipe, an inner heat conduction cylinder is arranged in the glue separation reaction cylinder, an outer cooling cylinder is arranged at the outer side of the inner heat conduction cylinder, a glue separation cavity is formed between the inner heat conduction cylinder and the outer cooling cylinder, a glue collecting cylinder is arranged at the bottom of the glue separation cavity, and a scraping and discharging assembly is arranged in the glue separation cavity; the scraping and discharging assembly is provided with a floating plate connected with an extension shaft, an extension plate is arranged on the side of the floating plate facing the outer cooling cylinder, a guide-in cambered surface is arranged at the front end of the floating plate, and the rotating plate is provided with a contact plate for driving a covering flap on the glue collecting cylinder, so that the separated glue is gathered in the extrusion groove and scraped off by a glue scraping plate, and is guided into the glue collecting cylinder when the covering flap is opened; the glue is first extruded and gathered into larger glue lumps or glue strips before being scraped off, and the stability of the glue separation from the water body is improved.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology in impregnated paper production, and more particularly to a device for treating glue-containing wastewater in impregnated paper production. Background Technology

[0002] In the impregnated paper production process, the base paper usually needs to be impregnated with melamine resin, urea-formaldehyde resin, phenolic resin or composite resin solution, and then dried, cut, changed glue and cleaned. In the above process, glue-containing wastewater is generated. This type of wastewater contains resin colloids, free formaldehyde, urea, melamine, additives and fine paper fibers. The pollutants not only have a high organic load, but also have adhesiveness and film-forming properties, and can easily form a film on the inner wall of the treatment equipment, pipelines, filter components and the surface of subsequent fillers.

[0003] In existing technologies, for melamine-impregnated paper or similar adhesive-containing wastewater, there are combined processes using polycondensation reaction, pressure filtration, oxidative coagulation, and biochemical treatment. There are also devices that use reaction tanks, sedimentation tanks, filtration devices, and advanced oxidation devices in series to treat adhesive-containing wastewater. These solutions can usually reduce the content of COD, ammonia nitrogen, formaldehyde, or suspended solids in the overall process. However, their main focus is still on chemical reactions and downstream treatment processes. The colloids in the adhesive-containing wastewater may still be dispersed in a fine colloidal state before entering the above-mentioned treatment units. During the flow process, the colloids are easy to adhere to the wall surface and gradually form a film, leading to subsequent equipment blockage, difficulty in scraping, and frequent maintenance. Therefore, the prominent shortcoming of existing equipment is that the fine resin colloids in the adhesive-containing wastewater cannot be effectively squeezed, aggregated, and directionally scraped out in the front-end treatment space. This causes the colloids to easily form an irregular film on the inner wall of the reactor. Ordinary scrapers can only scrape off the film on the wall surface and cannot simultaneously complete the colloid squeezing and aggregation, centralized collection, opening of the collection channel, prevention of colloid backflow, and continuous pressure discharge. Summary of the Invention

[0004] This application proposes a wastewater treatment device for impregnated paper production containing adhesive, which has the advantage of squeezing and agglomerating fine colloids into larger colloids or strips before scraping, thereby improving the stability of colloid separation from water. This solves the problem in existing wastewater treatment devices containing adhesive that fine colloids easily form a film on the colloid separation chamber or reactor wall, and that ordinary scraping structures cannot simultaneously achieve the functions of squeezing and agglomerating colloids, centralized colloid guiding, preventing backflow and collecting colloids, and continuous colloid discharge.

[0005] To achieve the above objectives, this application adopts the following technical solution: a wastewater treatment device for impregnated paper production containing glue, comprising a glue separation reaction cylinder, wherein the glue separation reaction cylinder is provided with an inlet pipe and an outlet pipe, an inner heat-conducting cylinder is provided inside the glue separation reaction cylinder, an outer cooling cylinder is provided outside the inner heat-conducting cylinder, a glue separation cavity is formed between the inner heat-conducting cylinder and the outer cooling cylinder, a glue collection cylinder is provided at the bottom of the glue separation cavity, and a scraping assembly is provided inside the glue separation cavity; a drive source is provided at the top of the glue separation reaction cylinder, the drive source is connected to a drive shaft extending into the glue separation cavity, an extension arm is provided on the drive shaft, a connecting rod is movably provided inside the extension arm, a telescopic shaft is provided below the connecting rod, the scraping assembly has a floating plate connected to the telescopic shaft, and an extension arm is provided on the side of the floating plate facing the outer cooling cylinder. The floating plate has an inlet arc surface at its front end and a contraction arc surface at its bottom that curves toward the inner wall of the outer cooling cylinder. A water passage gap that gradually narrows along the rotation direction is formed between the contraction arc surface and the inner wall of the outer cooling cylinder. An extrusion groove with a gradually narrowing glue outlet is formed on the contraction arc surface. A concentrating plate is provided at the end of the floating plate away from the inlet arc surface. A collection groove corresponding to the glue outlet of the extrusion groove is provided on the concentrating plate. A scraper is provided on one side of the concentrating plate that contacts the inner wall of the outer cooling cylinder. A rotating plate is rotatably provided on the scraper. The rotating plate is provided with a contact plate for actuating the cover flap on the glue collection cylinder, so that the precipitated glue is collected by the extrusion groove and scraped off by the scraper, and then introduced into the glue collection cylinder when the cover flap is opened.

[0006] Furthermore, the top of the floating plate is provided with a mounting hole, the bottom of the telescopic shaft extends into the mounting hole, a return spring is provided in the mounting hole, one end of the return spring is connected to the bottom of the telescopic shaft, and the other end of the return spring is connected to the bottom of the inner wall of the mounting hole. The bottom of the telescopic shaft is provided with a limiting flange, and the opening of the mounting hole is provided with a limiting step corresponding to the limiting flange, so that the floating plate can float and retract relative to the telescopic shaft when the glue scraping is obstructed, and the cooperation of the limiting flange and the limiting step restricts the telescopic shaft from coming out of the mounting hole.

[0007] Furthermore, the guide arc surface is disposed at the front end of the floating plate along the rotation direction. The guide arc surface is tapered in the top view and forms an arc-shaped guide surface in the side. The guide arc surface is used to guide the glue-containing wastewater in the glue separation chamber into the water passage gap.

[0008] Furthermore, the extrusion groove extends along the rotation direction of the floating plate, and the width of the end of the extrusion groove away from the guide arc surface gradually decreases. The inlet width of the extrusion groove is greater than the outlet width of the extrusion groove, so that the glue-containing wastewater entering the extrusion groove is subjected to step-by-step extrusion during the flow process and the colloids are aggregated into clumps.

[0009] Furthermore, the concentrating plate is located on the side of the shrinking arc surface away from the guiding arc surface, and the collecting groove is configured in multiple sets and arranged at intervals along the height direction of the concentrating plate. The collecting groove is used to receive the colloid after it has been squeezed and gathered by the extrusion groove, and to guide the colloid to the side where the scraper is located.

[0010] Furthermore, the scraper is disposed on the side of the concentrator plate near the inner wall of the outer cooling cylinder. The scraper extends along the inner wall of the outer cooling cylinder, and the scraping side of the scraper is in elastic contact with the inner wall of the outer cooling cylinder to scrape off the adhesive film adhering to the inner wall of the outer cooling cylinder.

[0011] Furthermore, a bonding plate is provided at one top end of the rotating plate, which is in contact with the surface of the scraper plate. The contact plate is located at the end of the rotating plate away from the bonding plate and is curved. The top of the glue collection cylinder has a glue inlet, which is located below the glue guiding trajectory formed by the rotating plate rotating with the floating plate. When the floating plate rotates to above the glue collection cylinder, the contact plate first contacts and pushes the covering flap, and the glue guiding end of the rotating plate then passes over the glue inlet of the glue collection cylinder.

[0012] Furthermore, the covering flaps are configured in three groups, which are arranged sequentially along the covering path of the top glue inlet of the glue collection cylinder, and any group of covering flaps can rotate to cover the top glue inlet. When the floating plate rotates above the glue collection cylinder, the contact plate pushes the first group of covering flaps located at the top glue inlet to flip towards the inside of the glue collection cylinder, so that the glue guided by the rotating plate enters the glue collection cylinder, and the second group of covering flaps moves to the covering position of the top glue inlet. A limit stop is provided at the rotating connection of the covering flaps, and the limit stop is used to restrict the covering flaps from flipping in the opposite direction to the glue separation chamber.

[0013] Furthermore, a temporary storage box is connected to the lower part of the glue collection cylinder, and a glue discharge port is provided on one side of the temporary storage box. A pressure discharge screw is provided inside the temporary storage box, and the lower end of the pressure discharge screw extends into the temporary storage box. The pressure discharge screw is driven to rotate by a glue discharge drive component to press the glue in the glue collection cylinder downward into the temporary storage box. The temporary storage box is provided with a glue guide bottom surface extending towards the glue discharge port. The glue guide bottom surface is connected to the glue discharge port, so that the glue pressed into the temporary storage box by the pressure discharge screw turns along the glue guide bottom surface and is discharged from the glue discharge port.

[0014] Furthermore, a groove is formed inside the extension arm, and the connecting rod is slidably disposed in the groove. A mounting plate is provided on the inner wall of one end of the groove, and a telescopic rod is provided on the mounting plate. One end of the telescopic rod is connected to the connecting rod, and a buffer spring is sleeved on the telescopic rod. One end of the buffer spring abuts against the mounting plate, and the other end of the buffer spring abuts against the connecting rod, so that the connecting rod can extend and retract along the extension arm for buffering. One end of the water outlet pipe is connected to a post-treatment unit.

[0015] The beneficial effects of this invention are as follows:

[0016] This application provides a wastewater treatment device for impregnated paper production containing adhesive. By introducing an arc-shaped, shrinking arc-shaped, and gradually narrowing extrusion groove, it achieves the effect of squeezing and aggregating fine adhesives into larger adhesive clumps or strips before scraping, thereby improving the stability of adhesive separation from water.

[0017] This application provides a wastewater treatment device for impregnated paper production containing adhesive. The device forms a continuous adhesive guiding path through a concentrating plate, a collecting tank, a scraper plate, and a rotating plate. This allows the adhesive that has been squeezed and aggregated, as well as the adhesive film on the inner wall of the outer cooling cylinder, to be collected along the same movement path and guided to the adhesive collecting cylinder, thus preventing the adhesive from being scraped off and redispersed in the adhesive separation chamber.

[0018] This application provides a wastewater treatment device for impregnated paper production containing adhesive. By actuating the cover flap via the contact plate, the scraped adhesive enters the collection cylinder when the floating plate moves above the collection cylinder. The backflow of adhesive is reduced by the cooperation of the cover flap and the limiting block.

[0019] This application provides a wastewater treatment device for impregnated paper production containing adhesive. The device provides vertical floating relief and radial extension and buffering through a reset spring and a buffer spring, respectively. This ensures that the floating plate, the scraper plate and the inner wall of the outer cooling cylinder can maintain scraping contact with the adhesive, and can reduce jamming and wear when there is a thick adhesive film or foreign object obstruction. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention from a first perspective;

[0022] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention from a second perspective;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the inner heat-conducting cylinder, outer cooling cylinder, and gelation cavity of the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the gelation cavity of the present invention;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the floating plate of the present invention;

[0026] Figure 6 This is a schematic diagram showing the flow direction of the liquid in contact with the contraction arc surface of the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the glue collection cylinder of the present invention;

[0028] Figure 8 This is a partial cross-sectional three-dimensional structural diagram of the glue collection cylinder of the present invention;

[0029] Figure 9 For the present invention Figure 4 Enlarged 3D structural diagram at point A.

[0030] In the diagram: 1. Glue separation reaction cylinder; 2. Water inlet pipe; 3. Water outlet pipe; 4. Inner heat conduction cylinder; 5. Outer cooling cylinder; 6. Glue separation chamber; 7. Drive source; 8. Drive shaft; 9. Extension arm; 10. Connecting rod; 11. Telescopic shaft; 12. Mounting hole; 13. Return spring; 14. Floating plate; 15. Extension plate; 16. Inlet arc surface; 17. Contraction arc surface; 18. Extrusion groove; 19. Concentrating plate; 20. Glue scraper; 21. Collection groove; 22. Rotating plate; 23. Adhesion plate; 24. Contact plate; 25. Glue collection cylinder; 26. Glue discharge port; 27. Cover flap; 28. Temporary storage box; 29. ​​Pressure discharge screw; 30. Mounting plate; 31. Telescopic rod; 32. Buffer spring; 33. Post-processing unit. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1, as Figures 1 to 4As shown, a wastewater treatment device for glue-containing materials in impregnated paper production includes a glue separation reaction cylinder 1. The side of the glue separation reaction cylinder 1 is provided with an inlet pipe 2 and an outlet pipe 3. The inlet pipe 2 is used to introduce the glue-containing wastewater generated during the impregnated paper production process into the glue separation reaction cylinder 1, and the outlet pipe 3 is used to guide the wastewater after the front-end glue separation scraper to the post-treatment unit 33. The post-treatment unit 33 can adopt a coagulation sedimentation, oxidation treatment, biochemical treatment or a combination thereof. The post-treatment unit 33 belongs to the subsequent conventional treatment part, and will not be described in detail here.

[0033] like Figure 3 and Figure 4 As shown, the gelation reaction cylinder 1 is equipped with an inner heat-conducting cylinder 4 and an outer cooling cylinder 5. The outer cooling cylinder 5 is located outside the inner heat-conducting cylinder 4, and a gelation cavity 6 is formed between the inner heat-conducting cylinder 4 and the outer cooling cylinder 5. This embodiment is suitable for impregnated paper production wastewater containing melamine-modified urea-formaldehyde resin, melamine-formaldehyde resin, urea-formaldehyde resin, or a mixture of the above resins. The inner heat-conducting cylinder 4 can conduct heat gently through hot water, low-pressure steam condensate, or an electric heating structure to maintain the wastewater temperature near the inner heat-conducting cylinder 4 at 35°C. The outer cooling cylinder 5 can be cooled by a cooling water jacket or a cooling water circulation pipe, maintaining the temperature of the wastewater near the inner wall of the outer cooling cylinder 5 between 15°C and 35°C. This creates a temperature difference environment within the gelation chamber 6, with a higher temperature near the inner heat-conducting cylinder 4 and a lower temperature near the outer cooling cylinder 5. This temperature difference environment promotes the enrichment and precipitation of resin colloids in the glue-containing wastewater near the inner wall of the outer cooling cylinder 5, forming a film. The preferred temperature difference between the inner heat-conducting cylinder 4 and the outer cooling cylinder 5 is 10°C to 25°C. When the temperature difference is less than 10°C, the viscosity change and film formation tendency of the colloids near the wall are not obvious; when the temperature difference is greater than 25°C, the local colloids tend to solidify too quickly, increasing the scraping resistance. The residence time of the glue-containing wastewater in the gelation chamber 6 is preferably 3 minutes to 15 minutes, allowing the colloids near the wall to gradually adhere to the inner wall of the outer cooling cylinder 5 under the influence of temperature difference, low-speed flow, and subsequent extrusion, providing conditions for subsequent scraping and collection.

[0034] like Figures 1 to 4As shown, a drive source 7 is installed at the top of the gelation reaction cylinder 1. The drive source 7 can be a geared motor. The output end of the drive source 7 is connected to a drive shaft 8. The drive shaft 8 extends into the gelation chamber 6 along the height direction of the gelation reaction cylinder 1. An extension arm 9 is installed on the drive shaft 8. The extension arm 9 extends toward the inner wall of the outer cooling cylinder 5. A connecting rod 10 is movably installed inside the extension arm 9. A telescopic shaft 11 is installed below the connecting rod 10. The telescopic shaft 11 is used to connect to and drive the floating plate 14. The bottom outer periphery of the telescopic shaft 11 can be set as a polygonal segment or a transmission segment with protrusions. The mounting hole 12 is provided with a polygonal hole or keyway hole that mates with it. Through the mating structure, the telescopic shaft 11 can transmit the circumferential rotational power of the drive shaft 8 to the floating plate 14. At the same time, the floating plate 14 can still float and retract along the axial direction of the telescopic shaft 11 within the mounting hole 12. When the drive source 7 is working, the drive shaft 8, the extension arm 9, the connecting rod 10 and the telescopic shaft 11 drive the floating plate 14 to rotate circumferentially along the gelation cavity 6, so that the floating plate 14 can pass through different positions on the inner wall of the outer cooling cylinder 5 in sequence during the rotation, and continuously process the gelation.

[0035] like Figure 5 , Figure 6 and Figure 9 As shown, the scraping assembly includes a floating plate 14. An extension plate 15 is provided on the side of the floating plate 14 facing the outer cooling cylinder 5. An induction arc surface 16 is provided at the front end of the floating plate 14. A contraction arc surface 17 is formed at the bottom of the floating plate 14, which bends towards the inner wall of the outer cooling cylinder 5. The induction arc surface 16 is gradually narrowed in the top view and forms an arc-shaped guide surface in the side view. Under the rotation of the floating plate 14, the glue-containing wastewater is first guided by the induction arc surface 16 into the space between the floating plate 14 and the inner wall of the outer cooling cylinder 5, and then enters the water passage gap formed between the contraction arc surface 17 and the inner wall of the outer cooling cylinder 5. The water passage gap gradually narrows along the rotation direction of the floating plate 14, so that the fine colloids in the water flow are compressed and polymerized when passing through this area.

[0036] Multiple sets of extrusion grooves 18 are formed on the surface of the shrinking arc surface 17. The extrusion grooves 18 extend along the rotation direction of the floating plate 14, and gradually narrow at the end away from the inlet arc surface 16. After the glue-containing wastewater enters the extrusion groove 18, as the width of the extrusion groove 18 gradually decreases, the colloidal particles are squeezed step by step and move closer to each other, thus gradually transforming from a fine dispersed state into larger colloidal clumps or sheet-like films. This process mainly relies on low-speed extrusion, channel shrinkage, and groove end convergence to achieve colloidal concentration, thereby avoiding the re-dispersal of already formed colloidal clumps. The inlet width of the extrusion groove 18 is determined according to the maximum paper fiber clump diameter allowed to pass through the front-end filter or grid. The inlet width of the compression tank 18 is greater than the diameter of the largest paper fiber cluster to prevent paper fibers from bridging and clogging directly at the inlet. The outlet width of the compression tank 18 is less than the inlet width but greater than the diameter of the largest paper fiber cluster, so that the colloid can be squeezed and aggregated step by step without completely blocking the outlet. If the outlet width of the compression tank 18 is too large, the colloid will not aggregate sufficiently and will easily continue to disperse with the water flow. If the outlet width of the compression tank 18 is too small, paper fibers and large colloid clusters will easily cause bridging and clogging. Therefore, the inlet width, outlet width, and tank depth of the compression tank 18 can be routinely adjusted according to the wastewater viscosity, colloid concentration, paper fiber entrainment amount, and front-end filter particle size.

[0037] like Figure 5 and Figure 6 As shown, a concentrating plate 19 is provided at the end of the floating plate 14 away from the guide arc surface 16. Multiple sets of collection grooves 21 are formed on the surface of the concentrating plate 19. The collection grooves 21 correspond to the glue outlet end of the extrusion groove 18 and are used to receive the glue after it has been squeezed and gathered by the extrusion groove 18, and guide the glue to the side of the concentrating plate 19 close to the scraper plate 20. Through the continuous arrangement of the extrusion groove 18 and the collection grooves 21, the glue no longer relies solely on gravity to settle, but is actively introduced, compressed and concentrated in the rotation path of the floating plate 14, thereby improving the directionality of glue collection.

[0038] A scraper 20 is provided on the side of the concentrating plate 19 near the inner wall of the outer cooling cylinder 5. The scraper 20 extends along the inner wall of the outer cooling cylinder 5, and the scraping side of the scraper 20 contacts the inner wall of the outer cooling cylinder 5. The scraper 20 is used to scrape off the adhesive film attached to the inner wall of the outer cooling cylinder 5, and at the same time receive the adhesive from the collection tank 21. The scraper 20 can be made of corrosion-resistant elastic material or metal matrix composite elastic scraping edge structure, so that it can maintain the scraping function and also make some clearance when contacting thick adhesive film or small paper fiber clumps.

[0039] A rotating plate 22 is rotatably mounted on the scraper 20. A bonding plate 23 is located at one top end of the rotating plate 22, and the bonding plate 23 is in contact with the surface of the scraper 20. A contact plate 24 is located at the end of the rotating plate 22 away from the bonding plate 23. The contact plate 24 is curved. The rotating plate 22 is used to receive the adhesive film or clump scraped off by the scraper 20 and guides the colloid to the bottom area of ​​the gelation chamber 6 as the floating plate 14 continues to rotate. The top of the collection cylinder 25 has a colloid inlet. The glue inlet of 25 is located below the glue guiding trajectory formed by the rotating plate 22 as the floating plate 14 rotates; when the floating plate 14 rotates to the top of the glue collection cylinder 25, the contact plate 24 first contacts and pushes the cover flap 27, and the glue guiding end of the rotating plate 22 then passes over the glue inlet of the glue collection cylinder 25, so that the glue on the rotating plate 22 falls into the glue collection cylinder 25 after the cover flap 27 is opened. This sequence of first removing the cover and then guiding the glue can prevent the glue from being blocked by the cover flap 27 and remaining in the glue separation chamber 6.

[0040] like Figure 7 and Figure 8 As shown, a collection cylinder 25 is provided at the bottom of the gelation chamber 6. A cover flap 27 is rotatably installed at the top inlet of the collection cylinder 25. Three sets of cover flaps 27 are arranged sequentially along the covering path of the top inlet of the collection cylinder 25. Any set of cover flaps 27 can rotate to cover the top inlet of the collection cylinder 25. When in the covering position, the cover flaps 27 block the top inlet of the collection cylinder 25 to reduce the backflow of colloid from the collection cylinder 25 into the gelation chamber 6 due to water flow disturbance. When the floating plate 14 rotates above the collection cylinder 25, the contact plate 24 first contacts the first set of cover flaps 27 located at the top inlet of the collection cylinder 25 and pushes the first set of cover flaps 27 to rotate inwards towards the inside of the collection cylinder 25, allowing the colloid film, strip, or clump guided by the rotating plate 22 to enter the collection cylinder 25. After the first set of cover flaps 27 is pushed open, the second set of cover flaps 27 moves to the original covering position of the first set of cover flaps 27, continuing to cover the top glue inlet of the glue collection cylinder 25; subsequently, the third set of cover flaps 27 continues to take the position of the second set of cover flaps 27, thus forming an alternating opening and reciprocating covering of the three sets of cover flaps 27. Through the above structure, this application does not rely on a single cover flap 27 to immediately return to the horizontal covering position by its own weight after opening, but utilizes the alternating covering relationship of the three sets of cover flaps 27 to ensure that the top glue inlet of the glue collection cylinder 25 can still be covered after glue is guided, thereby reducing glue backflow. A limiting block can be set at the rotating connection of the cover flaps 27. The limiting block is used to restrict the cover flaps 27 from flipping back towards the glue separation chamber 6, so that the cover flaps 27 maintain a stable sealing position when alternating covering.

[0041] like Figure 7 and Figure 8As shown, a temporary storage box 28 is connected to the lower part of the glue collection cylinder 25. A glue discharge port 26 is provided on one side of the temporary storage box 28. A pressure discharge screw 29 is provided inside the temporary storage box 28. The lower end of the pressure discharge screw 29 extends into the temporary storage box 28. The pressure discharge screw 29 can be driven to rotate by a glue discharge drive component provided at the bottom of the glue collection cylinder 25. The pressure discharge screw 29 is used to apply downward pressure to the glue film, glue strip or glue clump entering the glue collection cylinder 25, so that the glue enters the temporary storage box 28 from the glue collection cylinder 25. After the pressure discharge screw 29 presses the glue downward into the temporary storage box 28, the glue entering laterally continues to be subjected to the axial pressure of the pressure discharge screw 29, so that the glue at the bottom of the temporary storage box 28 moves towards the glue discharge port 26, thereby completing the turning process from vertical pressure discharge to lateral discharge. The glue discharge port 26 can be connected to a glue discharge valve or a glue residue collection container. Through this structure, the glue will not remain at the bottom of the glue separation chamber 6 for a long time, and it is not easy to harden and blockage.

[0042] like Figure 4 and Figure 9 As shown, a groove is provided inside the extension arm 9, and the connecting rod 10 is slidably disposed in the groove. An installation plate 30 is provided on the inner wall of one end of the groove, and a telescopic rod 31 is provided on the installation plate 30. One end of the telescopic rod 31 is connected to the connecting rod 10, and a buffer spring 32 is sleeved on the telescopic rod 31. One end of the buffer spring 32 abuts against the installation plate 30, and the other end abuts against the connecting rod 10. When the floating plate 14 or the scraper plate 20 is blocked by a thick adhesive film, local adhesive clumps, or paper fibers, the connecting rod 10 can generate radial buffer along the extension arm 9, reducing the rigid impact between the scraper assembly and the outer cooling cylinder 5. It can also allow the floating plate 14 to temporarily bypass the obstruction without affecting the overall scraping process.

[0043] like Figure 5 As shown, the top of the floating plate 14 is provided with a mounting hole 12, and the bottom of the telescopic shaft 11 extends into the mounting hole 12. A return spring 13 is provided in the mounting hole 12. One end of the return spring 13 is connected to the bottom of the telescopic shaft 11, and the other end is connected to the bottom of the inner wall of the mounting hole 12. A limiting flange is provided at the bottom of the telescopic shaft 11, and a limiting step corresponding to the limiting flange is provided at the opening of the mounting hole 12. The limiting flange can abut against the limiting step when the telescopic shaft 11 moves outward relative to the mounting hole 12 to the limit position, thereby preventing the telescopic shaft 11 from coming out of the mounting hole 12. Through the return spring 13, the floating plate 14 can float and retract to a certain extent in the vertical or inclined direction. When the scraper 20 encounters a thick adhesive film, the floating plate 14 can retract a short distance and reset after passing the obstacle. The buffer spring 32 mainly provides radial buffering, and the return spring 13 mainly provides floating reset. The two together improve the operational reliability of the scraper assembly.

[0044] Working principle of this application: During operation, the glue-containing wastewater enters the glue-separation reaction cylinder 1 through the inlet pipe 2 and flows into the glue-separation chamber 6 between the inner heat-conducting cylinder 4 and the outer cooling cylinder 5. The inner heat-conducting cylinder 4 gently conducts heat to the wastewater, while the outer cooling cylinder 5 keeps the area near the outer wall at a lower temperature. The resin colloid gradually accumulates and precipitates near the inner wall of the outer cooling cylinder 5. After the drive source 7 is started, the drive shaft 8 drives the extension arm 9, connecting rod 10, telescopic shaft 11, and floating plate 14 to rotate. The glue-containing wastewater is first introduced into the water passage gap between the contraction arc surface 17 and the outer cooling cylinder 5 through the inlet arc surface 16, and then enters the gradually narrowing extrusion groove 18 where it is squeezed and collected. The collected colloid enters the collection groove 21 on the concentration plate 19 and is guided by the scraper 20. The scraper 20 simultaneously scrapes off the colloid film on the inner wall of the outer cooling cylinder 5, and the colloid is then rotated by the rotating plate 22. As the floating plate 14 continues to rotate, when the contact plate 24 rotates to the top of the glue collection cylinder 25, the contact plate 24 first pushes the cover flap 27 to open into the glue collection cylinder 25. Then, the guide end of the rotating plate 22 passes over the glue inlet of the glue collection cylinder 25, and the glue enters the glue collection cylinder 25 and falls into the temporary storage box 28. Then, it is pushed to the glue discharge port 26 by the pressure discharge screw 29 and discharged. After the above-mentioned front-end glue separation and scraping, the wastewater enters the post-treatment unit 33 through the water outlet pipe 3. Since the glue in it has been squeezed and agglomerated and partially discharged, the risk of glue clogging in the post-treatment unit 33 is reduced. The same rotation action completes the introduction of glue-containing wastewater, squeezing and agglomerating glue, scraping glue, guiding glue, opening the cover into the cylinder, preventing backflow and pressing and discharging glue. This solves the problem that the glue is easy to adhere to the wall and form a film in the existing glue-containing wastewater treatment equipment and that the ordinary scraping structure is difficult to collect and discharge.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wastewater treatment device for impregnated paper production containing adhesive, comprising an adhesive separation reaction cylinder (1), wherein the adhesive separation reaction cylinder (1) is provided with an inlet pipe (2) and an outlet pipe (3), characterized in that, The gelation reaction cylinder (1) is provided with an inner heat-conducting cylinder (4), and an outer cooling cylinder (5) is provided on the outside of the inner heat-conducting cylinder (4). A gelation cavity (6) is formed between the inner heat-conducting cylinder (4) and the outer cooling cylinder (5). A gel collection cylinder (25) is provided at the bottom of the gelation cavity (6). A scraping assembly is provided inside the gelation cavity (6). A drive source (7) is provided at the top of the gelation reaction cylinder (1). The drive source (7) is connected to a drive shaft (8) that extends into the gelation chamber (6). An extension arm (9) is provided on the drive shaft (8). A connecting rod (10) is movably provided inside the extension arm (9). A telescopic shaft (11) is provided below the connecting rod (10). The scraping assembly has a floating plate (14) connected to the telescopic shaft (11). An extension plate (15) is provided on the side of the floating plate (14) facing the outer cooling cylinder (5). An inlet arc surface (16) is provided at the front end of the floating plate (14). A contraction arc surface (17) is formed at the bottom of the floating plate (14) and bends towards the inner wall of the outer cooling cylinder (5). The contraction arc surface (17) and the inner wall of the outer cooling cylinder (5) form a gradually increasing distance along the rotation direction. The water passage gap gradually narrows. The contraction arc surface (17) is provided with an extrusion groove (18) with a gradually narrowing glue outlet. The floating plate (14) is provided with a concentration plate (19) at one end away from the guide arc surface (16). The concentration plate (19) is provided with a collection groove (21) corresponding to the glue outlet of the extrusion groove (18). A scraper (20) is provided on one side of the concentration plate (19) and contacts the inner wall of the outer cooling cylinder (5). A rotating plate (22) is rotatably provided on the scraper (20). The rotating plate (22) is provided with a contact plate (24) for moving the cover flap (27) on the glue collection cylinder (25). The precipitated glue is collected by the extrusion groove (18) and scraped off by the scraper (20). When the cover flap (27) is opened, it is introduced into the glue collection cylinder (25).

2. The wastewater treatment equipment for impregnated paper production according to claim 1, characterized in that, The floating plate (14) has a mounting hole (12) at its top. The bottom of the telescopic shaft (11) extends into the mounting hole (12). A return spring (13) is provided in the mounting hole (12). One end of the return spring (13) is connected to the bottom of the telescopic shaft (11), and the other end of the return spring (13) is connected to the bottom of the inner wall of the mounting hole (12). A limiting flange is provided at the bottom of the telescopic shaft (11), and a limiting step corresponding to the limiting flange is provided at the opening of the mounting hole (12). This allows the floating plate (14) to float and retract relative to the telescopic shaft (11) when the glue scraping is obstructed, and the telescopic shaft (11) is restricted from coming out of the mounting hole (12) by the cooperation of the limiting flange and the limiting step.

3. The wastewater treatment equipment for impregnated paper production according to claim 1, characterized in that, The inlet arc surface (16) is disposed at the front end of the floating plate (14) along the rotation direction. The inlet arc surface (16) is tapered in the top view and forms an arc-shaped guide surface in the side. The inlet arc surface (16) is used to guide the glue-containing wastewater in the glue separation chamber (6) into the water passage gap.

4. The wastewater treatment equipment for impregnated paper production according to claim 1, characterized in that, The extrusion groove (18) extends along the rotation direction of the floating plate (14), and the width of the end of the extrusion groove (18) away from the guide arc surface (16) gradually decreases. The inlet width of the extrusion groove (18) is greater than the outlet width of the extrusion groove (18), so that the glue-containing wastewater entering the extrusion groove (18) is subjected to step-by-step extrusion during the flow process and the colloids are aggregated into clumps.

5. The wastewater treatment equipment for impregnated paper production according to claim 1, characterized in that, The concentrating plate (19) is located on the side of the contraction arc surface (17) away from the inlet arc surface (16). The collecting groove (21) is set in multiple groups and arranged at intervals along the height direction of the concentrating plate (19). The collecting groove (21) is used to receive the colloid after it has been squeezed and gathered by the extrusion groove (18) and guide the colloid to the side where the scraper plate (20) is located.

6. The wastewater treatment equipment for impregnated paper production according to claim 1, characterized in that, The scraper (20) is disposed on the side of the central plate (19) near the inner wall of the outer cooling cylinder (5). The scraper (20) extends along the inner wall of the outer cooling cylinder (5). The scraping side of the scraper (20) is in elastic contact with the inner wall of the outer cooling cylinder (5) to scrape off the adhesive film attached to the inner wall of the outer cooling cylinder (5).

7. The adhesive-containing wastewater treatment equipment for impregnated paper production according to claim 6, characterized in that, The rotating plate (22) has a bonding plate (23) at one top end, which is in contact with the surface of the scraper plate (20). The contact plate (24) is located at the end of the rotating plate (22) away from the bonding plate (23) and is bent. The glue collection cylinder (25) has a glue inlet at the top and is located below the glue guiding trajectory formed by the rotating plate (22) rotating with the floating plate (14). When the floating plate (14) rotates to the top of the glue collection cylinder (25), the contact plate (24) first contacts and pushes the cover flap (27), and the glue guiding end of the rotating plate (22) then passes over the glue inlet of the glue collection cylinder (25).

8. The adhesive-containing wastewater treatment equipment for impregnated paper production according to claim 7, characterized in that, The covering flaps (27) are configured in three groups. The three groups of covering flaps (27) are arranged sequentially along the covering path of the top glue inlet of the glue collection cylinder (25), and any group of covering flaps (27) can rotate to cover the top glue inlet. When the floating plate (14) rotates to the top of the glue collection cylinder (25), the contact plate (24) pushes the first group of covering flaps (27) located at the top glue inlet to flip towards the inside of the glue collection cylinder (25), so that the glue guided by the rotating plate (22) enters the glue collection cylinder (25), and the second group of covering flaps (27) moves to the covering position of the top glue inlet. A limit stop is provided at the rotating connection of the covering flaps (27), and the limit stop is used to restrict the covering flaps (27) from flipping in the opposite direction to the glue separation chamber (6).

9. The wastewater treatment equipment for impregnated paper production according to claim 1, characterized in that, A temporary storage box (28) is connected to the bottom of the glue collection cylinder (25). A glue discharge port (26) is provided on one side of the temporary storage box (28). A pressure discharge screw (29) is provided inside the temporary storage box (28). The lower end of the pressure discharge screw (29) extends into the temporary storage box (28). The pressure discharge screw (29) is driven to rotate by a glue discharge drive component to press the glue in the glue collection cylinder (25) downward into the temporary storage box (28). A glue guide bottom surface is provided inside the temporary storage box (28) extending toward the glue discharge port (26). The glue guide bottom surface is connected to the glue discharge port (26) so that the glue pressed into the temporary storage box (28) by the pressure discharge screw (29) turns along the glue guide bottom surface and is discharged from the glue discharge port (26).

10. The wastewater treatment equipment for impregnated paper production according to claim 1, characterized in that, The extension arm (9) has a groove, and the connecting rod (10) is slidably disposed in the groove. An installation plate (30) is provided on the inner wall of one end of the groove. A telescopic rod (31) is provided on the installation plate (30). One end of the telescopic rod (31) is connected to the connecting rod (10). A buffer spring (32) is sleeved on the telescopic rod (31). One end of the buffer spring (32) abuts against the installation plate (30), and the other end of the buffer spring (32) abuts against the connecting rod (10), so that the connecting rod (10) can extend and retract along the extension arm (9) for buffering. One end of the water outlet pipe (3) is connected to a post-treatment unit (33).

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