Corrugated paper production sewage treatment equipment and treatment method thereof

Abstract

This invention relates to the field of corrugated paper production technology, and discloses a wastewater treatment device and method for corrugated paper production. The device includes a wastewater tank with a waste residue recovery mechanism at its top and a receiving platform. A stirring chamber is formed between the outer wall of a water-separating cylinder and the inner wall of an inlet cylinder. A slag discharge port is located at the top of the water-separating cylinder above a material discharge basin. A spiral conveyor extends into the material discharge basin, and a stirring and collecting mechanism is installed within the stirring chamber. This wastewater treatment device and method for corrugated paper production uses a scraper to scrape material from the surface of a filter screen through circumferential rotation, reducing filter screen clogging and improving wastewater filtration efficiency. Simultaneously, a high-speed rotating screen plate perpendicular to the water flow direction intercepts slag in the wastewater, allowing the slag to be recovered and discharged into the material discharge basin, achieving solid-liquid wastewater separation.

Description

Technical Field

[0001] This invention relates to the field of corrugated paper production technology, and in particular to a wastewater treatment device and treatment method for corrugated paper production. Background Technology

[0002] Corrugated cardboard is a multi-layered bonded structure, consisting of at least one corrugated core layer and one cardboard layer. The production process of corrugated cardboard includes the preparation of fiber pulp, the gluing of the cardboard, the preparation of the corrugated core, the corrugated cardboard forming process, wastewater treatment, and the cutting, embossing, or coating of the corrugated cardboard.

[0003] Wastewater treatment in corrugated paper production is an essential step in the process, aiming to reduce the pollutant content in the wastewater to meet discharge standards or reuse requirements. However, in actual wastewater treatment, the presence of numerous fine paper fibers in the wastewater easily leads to blockages, affecting treatment efficiency and hindering the recycling of these fibers. Therefore, we propose an improvement: a wastewater treatment device and method for corrugated paper production. Summary of the Invention

[0004] In view of the problems of clogging that easily occurs in the existing wastewater treatment process for corrugated paper production, which affects wastewater treatment efficiency and makes it inconvenient to recycle fiber paper scraps, this invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a wastewater treatment device and method for corrugated paper production. The purpose is to scrape the filter screen surface by rotating the scraper to reduce the clogging of the filter screen and improve the filtration efficiency of wastewater. At the same time, the high-speed rotating screen plate intercepts the slag in the wastewater perpendicular to the water flow direction, so that the slag is recovered into the discharge basin and discharged, thereby realizing the separation of solid and liquid wastewater.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a wastewater treatment device and treatment method for corrugated paper production, comprising a wastewater tank, a waste residue recycling mechanism provided on the top of the wastewater tank, a collection platform installed on the top of the wastewater tank, a collection cylinder placed above the collection platform, the waste residue recycling mechanism comprising a conveying pipe, a drive box installed at one end of the conveying pipe, a spiral conveying rod assembled inside the conveying pipe, a discharge pipe installed at the end of the conveying pipe near the collection cylinder, and a dropping basin connected to the end of the conveying pipe away from the discharge pipe;

[0007] The material discharge basin is fitted with a water-separating cylinder, which is further fitted with a water inlet cylinder. The water inlet cylinder is fixedly connected to the inner wall of the sewage tank. The end of the conveying pipe away from the discharge pipe is fitted with an end plate. A stirring chamber is formed between the outer wall of the water-separating cylinder and the inner wall of the water inlet cylinder. Several filter screens are embedded in a circular array inside the end plate, and the filter screens are located inside the stirring chamber. A slag discharge port is opened at the top of the water-separating cylinder, located above the material discharge basin. The spiral conveying rod extends into the material discharge basin. A stirring and collecting mechanism is provided inside the stirring chamber. The stirring and collecting mechanism includes mesh plates distributed in a circular array. One side of the mesh plate contacts the inner wall of the water inlet cylinder, and the other side of the mesh plate contacts the outer wall of the water-separating cylinder. A scraper is connected to the side of the mesh plate near the end plate. A first motor is installed on one side of the drive box. The first motor is used to drive the spiral conveying rod and several mesh plates to rotate. A sealing plate is installed at the end of the water-separating cylinder away from the conveying pipe, and the top of the sealing plate is connected to the inner wall of the water inlet cylinder.

[0008] In a preferred embodiment of the wastewater treatment equipment and method for corrugated paper production described in this invention, the end plate is movably connected to a toothed ring, one end of which extends into the inlet cylinder, the outer wall of which is movably fitted with the inner wall of the inlet cylinder, one end of a plurality of mesh plates is connected to the toothed ring, and the other end of the plurality of mesh plates is connected via a connecting rod, the outer wall of which is fitted with the inner wall of the inlet cylinder.

[0009] As a preferred embodiment of the wastewater treatment equipment and treatment method for corrugated paper production described in this invention, wherein: two meshing toothed discs are movably installed in the drive box, the output shaft of the first motor is drivenly connected to one of the toothed discs, one end of the spiral conveyor rod is coaxially connected to one of the toothed discs, the other end of the spiral conveyor rod is movably connected to the discharge basin, and the end of the discharge basin is connected to the sealing plate.

[0010] As a preferred embodiment of the wastewater treatment equipment and treatment method for corrugated paper production described in this invention, the conveying pipe is fitted with a connecting seat, a connecting plate is installed on one side of the connecting seat, a toothed column is movably connected to the top of the connecting plate, the toothed column is movably connected to the water inlet cylinder, the toothed column is meshed with a toothed ring, one of the toothed discs is concentrically connected to a drive shaft, the drive shaft movably extends to the outside of the drive box, the end of the drive shaft is movably connected to the connecting plate, and the drive shaft and the end of the toothed column are connected by a synchronous belt drive.

[0011] As a preferred embodiment of the wastewater treatment equipment and treatment method for corrugated paper production described in this invention, wherein: a first support plate is sleeved on the bottom of the inlet cylinder, the bottom of the first support plate is connected to the inner wall of the wastewater tank, the side wall of the first support plate is attached to the inner wall of the wastewater tank, a second support plate is installed on one side of the sealing plate, and the bottom of the second support plate is connected to the inner wall of the wastewater tank.

[0012] As a preferred embodiment of the wastewater treatment equipment and treatment method for corrugated paper production described in this invention, the axis of the conveying pipe forms a 30° angle with the horizontal line of the wastewater tank, the inlet cylinder and the water separator cylinder are concentrically distributed, and the axis of the water separator cylinder is collinear with the axis of the conveying pipe.

[0013] In a preferred embodiment of the wastewater treatment equipment and method for corrugated paper production described in this invention, a cleaning component is provided in the middle of the slag discharge port. The cleaning component includes at least one scraper, which moves vertically to scrape the material from the wire mesh.

[0014] As a preferred embodiment of the wastewater treatment equipment and treatment method for corrugated paper production according to the present invention, the cleaning component further includes a fixed base with an I-shaped cross-section. The two ends of the fixed base are respectively connected to the inner side of the slag discharge port. Scrapers are provided on both sides of the fixed base. A movable opening is provided inside the fixed base, and a toothed roller is movably installed in the movable opening. A rack assembly is provided on the side of the scraper near the toothed roller. The toothed roller meshes with the rack assembly. One end of the toothed roller movably extends to the outside of the sealing plate. A second motor for driving the toothed roller to rotate is installed outside the sealing plate.

[0015] As a preferred embodiment of the wastewater treatment method for corrugated paper production described in this invention, the wastewater treatment method for corrugated paper production includes: a wastewater treatment stage: wastewater in the wastewater tank enters from the bottom of the mixing chamber, is initially filtered by several filter screens, and is discharged from the end plate. A first motor drives several screens to rotate circumferentially, a scraper scrapes the filter screens, the screens rotate circumferentially to intercept waste residue, and when passing above the slag discharge port, the waste residue falls naturally into the slag discharge basin. A first motor drives a spiral conveyor rod to rotate, and the waste residue is fed into the conveying pipe and discharged into the discharge pipe and falls into the receiving cylinder.

[0016] Self-cleaning stage: The first motor changes its drive mode and drives several mesh plates to rotate sequentially to the top of the cleaning component. At the same time, the second motor drives the toothed roller to rotate in the forward direction, and the scraper moves upward to scrape and clean the side wall of the mesh plate. The second motor drives the toothed roller to rotate in the reverse direction, and the scraper moves downward to reset.

[0017] The beneficial effects of this invention are:

[0018] 1. This invention scrapes material from the surface of the filter screen by rotating the scraper bar in a circular motion, thereby reducing the likelihood of clogging and improving the filtration efficiency of wastewater. At the same time, the high-speed rotating screen plate intercepts slag in the wastewater perpendicular to the water flow direction, allowing the slag to be recovered and discharged into the discharge basin, thus achieving the separation of solid and liquid wastewater.

[0019] 2. This invention achieves a non-clogging corrugated paper wastewater treatment effect by setting up a cleaning component to scrape and clean the surface of the screen plate from top to bottom, and the rotation of the screen plate to clean the filter screen in a circular motion.

[0020] 3. This invention utilizes the rotation of the spiral conveyor rod to simultaneously control the rotation of the toothed column by the first motor, thereby achieving the effect of several mesh plates rotating circumferentially to intercept waste residue, thus realizing the energy efficiency of the sewage treatment equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] in:

[0023] Figure 1 This is a schematic diagram of the overall structure of the wastewater treatment equipment and treatment method for corrugated paper production according to the present invention.

[0024] Figure 2 This is a side view of the wastewater treatment equipment and treatment method for corrugated paper production according to the present invention.

[0025] Figure 3 This is a schematic diagram of the mixing and collecting mechanism of the wastewater treatment equipment and treatment method for corrugated paper production of the present invention.

[0026] Figure 4 This is a cross-sectional structural schematic diagram of the waste residue recycling mechanism of the wastewater treatment equipment and treatment method for corrugated paper production of the present invention.

[0027] Figure 5 This is a cross-sectional view of the inlet cylinder of the wastewater treatment equipment and treatment method for corrugated paper production of the present invention.

[0028] Figure 6 This is a schematic diagram of the assembly structure of the water-proof cylinder and cleaning components of the wastewater treatment equipment and treatment method for corrugated paper production of the present invention.

[0029] Figure 7 This is a schematic diagram of the cleaning component of the wastewater treatment equipment and treatment method for corrugated paper production of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Wastewater tank; 2. Collection platform; 3. Collection cylinder; 4. Waste residue recycling mechanism; 41. Conveying pipe; 42. Screw conveyor; 43. Discharge pipe; 44. Drop basin; 5. Drive box; 51. Gear disc; 52. First motor; 6. Water inlet cylinder; 7. Mixing and collecting mechanism; 71. Mesh plate; 72. Connecting rod; 73. Scraper; 74. Gear ring; 75. Gear column; 76. Connecting plate; 77. Connecting seat; 78. Drive shaft; 8. Water separator; 81. Slag outlet; 9. Cleaning components; 91. Scraper; 92. Fixed seat; 93. Movable outlet; 94. Gear roller; 95. Gear rack assembly; 10. End plate; 11. Filter screen; 12. Sealing plate; 13. First support plate; 14. Second support plate; 15. Second motor. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Example 1

[0034] Reference Figure 1-7This invention provides a wastewater treatment device and method for corrugated paper production, comprising a wastewater tank 1, a waste residue recycling mechanism 4 at the top of the wastewater tank 1, a collection platform 2 at the top of the wastewater tank 1, and a collection cylinder 3 placed above the collection platform 2. The waste residue recycling mechanism 4 includes a conveying pipe 41, a drive box 5 at one end of the conveying pipe 41, and a spiral conveying rod 42 inside the conveying pipe 41. A discharge pipe 43 is installed at one end of the receiving cylinder 3, and a discharge basin 44 is connected to the end of the conveying pipe 41 away from the discharge pipe 43. A water separator 8 is fitted over the discharge basin 44, and a water inlet cylinder 6 is fitted over the water separator 8. The water inlet cylinder 6 is fixedly connected to the inner wall of the sewage tank 1, and the water separator 8 is fixedly connected to the inner wall of the sewage tank 1. An end plate 10 is sleeved on the end of the conveying pipe 41 away from the discharge pipe 43. A stirring chamber is formed between the outer wall of the water separator 8 and the inner wall of the water inlet cylinder 6. Several filter screens 1 are embedded in the end plate 10 in a ring array. 1. The filter screen 11 is located inside the mixing chamber. A slag discharge port 81 is opened at the top of the water separator 8, located above the material discharge basin 44. The spiral conveyor rod 42 extends into the material discharge basin 44. A mixing and collecting mechanism 7 is provided inside the mixing chamber. The mixing and collecting mechanism 7 includes mesh plates 71 arranged in a circular array. One side of the mesh plate 71 contacts the inner wall of the water inlet cylinder 6, and the other side of the mesh plate 71 contacts the outer wall of the water separator 8. A scraper 73 is connected to the side of the mesh plate 71 near the end plate 10. The drive box 5... A first motor 52 is installed on the side, which drives the spiral conveyor rod 42 and several mesh plates 71 to rotate. A sealing plate 12 is installed at the end of the water separator 8 away from the conveying pipe 41. The top of the sealing plate 12 is connected to the inner wall of the water inlet cylinder 6, so that the sealing plate 12 blocks the upper stirring chamber. When the wastewater enters, it enters from several stirring chambers below and exits at several filter screens 11 below. This setting prevents the liquid part of the wastewater from flowing down from the slag outlet 81 into the material drop basin 44.

[0035] Combined with appendix Figure 1-4The end plate 10 is movably connected to a toothed ring 74, the movable connecting component being a bearing sleeve. One end of the toothed ring 74 extends into the water inlet cylinder 6, and the outer wall of the toothed ring 74 is movably fitted with the inner wall of the water inlet cylinder 6, the movable fitting component being a bearing sleeve. One end of several mesh plates 71 is connected to the toothed ring 74, and the other end of several mesh plates 71 is connected via a connecting rod 72. The outer wall of the connecting rod 72 is fitted with the inner wall of the water inlet cylinder 6, the movable fitting component being a bearing sleeve. Two meshing toothed discs 51 are movably installed inside the drive box 5. The output shaft of the first motor 52 is drivenly connected to one of the toothed discs 51. One end of the spiral conveyor rod 42 is coaxially connected to one of the toothed discs 51. The other end is movably connected to the material drop basin 44. The movable connection part is a bearing seat. The end of the material drop basin 44 is connected to the sealing plate 12 and fixed by bolts. The conveying pipe 41 is sleeved with a connecting seat 77. A connecting plate 76 is installed on one side of the connecting seat 77. A toothed column 75 is movably connected to the top of the connecting plate 76. The movable connection part is a bearing seat. The toothed column 75 is movably connected to the water inlet cylinder 6. The toothed column 75 meshes with the toothed ring 74. One of the toothed discs 51 is concentrically connected to a drive shaft 78. The drive shaft 78 movably extends to the outside of the drive box 5. The end of the drive shaft 78 is movably connected to the connecting plate 76. The drive shaft 78 and the end of the toothed column 75 are connected by a synchronous belt drive.

[0036] Combined with appendix Figure 1 and Figure 2 The bottom of the inlet cylinder 6 is fitted with a first support plate 13. The bottom of the first support plate 13 is connected to the inner wall of the sewage tank 1. The side wall of the first support plate 13 is in contact with the inner wall of the sewage tank 1. A second support plate 14 is installed on one side of the sealing plate 12. The bottom of the second support plate 14 is connected to the inner wall of the sewage tank 1, so that the wastewater is intercepted by the first support plate 13 and enters from the bottom stirring chamber. The axis of the conveying pipe 41 forms a 30° angle with the horizontal line of the sewage tank 1. The inlet cylinder 6 and the water-separating cylinder 8 are concentrically distributed. The axis of the water-separating cylinder 8 is collinear with the axis of the conveying pipe 41.

[0037] Example 2

[0038] Reference Figure 5-7 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0039] A cleaning component 9 is provided in the middle of the slag discharge port 81. The cleaning component 9 includes at least one scraper 91, which moves vertically to scrape the material from the screen plate 71. The cleaning component 9 also includes a fixing seat 92, which has an I-shaped cross-section. The two ends of the fixing seat 92 are respectively connected to the inner side of the slag discharge port 81. Scrapers 91 are provided on both sides of the fixing seat 92. A movable opening 93 is provided inside the fixing seat 92, and a toothed roller 94 is movably installed in the movable opening 93. A rack assembly 95 is provided on the side of the scraper 91 near the toothed roller 94. The toothed roller 94 and the rack assembly 95 The toothed roller 94 is engaged with the sealing plate 12. A second motor 15 is installed outside the sealing plate 12 to drive the toothed roller 94 to rotate. The scraper 91 has an L-shaped structure and is limited by meshing with the toothed roller 94. The I-shaped structure of the fixed seat 92 is used to limit the vertical movement of the two scrapers 91. When each screen plate 71 rotates to above the slag discharge port 81, it is exactly between the two scrapers 91. When the two scrapers 91 move vertically upward, they scrape off the filter residue on the outer wall of the screen plate 71. The scraped filter residue falls into the discharge basin 44.

[0040] The remaining structure is the same as that in Example 1.

[0041] Example 3

[0042] Reference Figure 1-7 This is the third embodiment of the present invention, which differs from the second embodiment in that:

[0043] A method for treating wastewater from corrugated paper production includes:

[0044] Wastewater treatment stage: Wastewater in wastewater tank 1 enters from the bottom of the mixing chamber, and after preliminary filtration by several filter screens 11, it is discharged from the end plate 10. The first motor 52 drives several screen plates 71 to rotate in a circular motion, and the scraper 73 scrapes the filter screens 11. The screen plates 71 rotate in a circular motion to intercept waste residue. When passing above the slag discharge port 81, the waste residue falls naturally into the slag discharge basin 44. The first motor 52 drives the screw conveyor 42 to rotate, and the waste residue is fed into the discharge pipe 43 in the conveying pipe 41 and falls into the collection cylinder 3. During wastewater filtration, the scraper 73 rotates in a circular motion to scrape the surface of the filter screens 11 to reduce the clogging of the filter screens 11 and improve the filtration efficiency of wastewater. At the same time, the high-speed rotating screen plates 71 intercept the slag in the wastewater perpendicular to the water flow direction. When the slag accumulates on the surface of the screen plates 71, it falls into the slag discharge basin 44 for recycling under its own gravity.

[0045] Self-cleaning stage: The first motor 52 changes its drive mode and drives several mesh plates 71 to rotate sequentially to the top of the cleaning component 9. At the same time, the second motor 15 drives the toothed roller 94 to rotate in the forward direction, and the scraper 91 moves upward to scrape and clean the side wall of the mesh plate 71. The second motor 15 drives the toothed roller 94 to rotate in the reverse direction, and the scraper 91 moves downward to reset. The first motor 52 is in servo motor control mode, which can clean the surface of the mesh plate 71. The rotation of the mesh plate 71 also cleans the filter screen 11, achieving a non-clogging corrugated paper wastewater treatment effect.

[0046] The remaining structure is the same as that in Example 2.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A wastewater treatment device for corrugated paper production, comprising a wastewater tank (1), characterized in that: The top of the sewage tank (1) is provided with a waste residue recycling mechanism (4), the top of the sewage tank (1) is provided with a collection platform (2), a collection cylinder (3) is placed on the top of the collection platform (2), the waste residue recycling mechanism (4) includes a conveying pipe (41), a drive box (5) is installed at one end of the conveying pipe (41), a spiral conveying rod (42) is installed inside the conveying pipe (41), a discharge pipe (43) is installed at the end of the conveying pipe (41) near the collection cylinder (3), and a drop basin (44) is connected to the end of the conveying pipe (41) away from the discharge pipe (43). The material discharge basin (44) is covered by a water-separating cylinder (8), and the water-separating cylinder (8) is covered by a water inlet cylinder (6). The water inlet cylinder (6) is fixedly connected to the inner wall of the sewage tank (1). The water-separating cylinder (8) is fixedly connected to the inner wall of the sewage tank (1). An end plate (10) is sleeved on the end of the conveying pipe (41) away from the discharge pipe (43). A stirring chamber is formed between the outer wall of the water-separating cylinder (8) and the inner wall of the water inlet cylinder (6). Several filter screens (11) are embedded in the end plate (10) in a circular array. The filter screens (11) are located in the stirring chamber. A slag discharge port (81) is opened at the top of the water-separating cylinder (8). The slag discharge port (81) is located above the material discharge basin (44). The spiral conveying rod (42) extends... The material is fed into the discharge basin (44). A mixing and collecting mechanism (7) is provided in the mixing chamber. The mixing and collecting mechanism (7) includes mesh plates (71) arranged in a ring array. One side of the mesh plate (71) is in contact with the inner wall of the water inlet cylinder (6), and the other side of the mesh plate (71) is in contact with the outer wall of the water separator cylinder (8). A scraper (73) is connected to the side of the mesh plate (71) near the end plate (10). A first motor (52) is installed on one side of the drive box (5). The first motor (52) is used to drive the spiral conveying rod (42) and several mesh plates (71) to rotate. A sealing plate (12) is installed at the end of the water separator cylinder (8) away from the conveying pipe (41). The top of the sealing plate (12) is connected to the inner wall of the water inlet cylinder (6).

2. The wastewater treatment equipment for corrugated paper production according to claim 1, characterized in that: The end plate (10) is movably connected to a toothed ring (74), one end of which extends into the water inlet cylinder (6). The outer wall of the toothed ring (74) is movably engaged with the inner wall of the water inlet cylinder (6). One end of several mesh plates (71) is connected to the toothed ring (74), and the other end of several mesh plates (71) is connected by a connecting rod (72). The outer wall of the connecting rod (72) is in contact with the inner wall of the water inlet cylinder (6).

3. The wastewater treatment equipment for corrugated paper production according to claim 2, characterized in that: Two meshing gear discs (51) are movably installed inside the drive box (5). The output shaft of the first motor (52) is connected to one of the gear discs (51) for transmission. One end of the spiral conveyor rod (42) is coaxially connected to one of the gear discs (51). The other end of the spiral conveyor rod (42) is movably connected to the discharge basin (44). The end of the discharge basin (44) is connected to the sealing plate (12).

4. The wastewater treatment equipment for corrugated paper production according to claim 3, characterized in that: The conveying pipe (41) is fitted with a connecting seat (77). A connecting plate (76) is installed on one side of the connecting seat (77). A toothed column (75) is movably connected to the top of the connecting plate (76). The toothed column (75) is movably connected to the water inlet cylinder (6). The toothed column (75) meshes with the toothed ring (74). One of the toothed discs (51) is concentrically connected to a drive shaft (78). The drive shaft (78) movably extends to the outside of the drive box (5). The end of the drive shaft (78) is movably connected to the connecting plate (76). The drive shaft (78) and the end of the toothed column (75) are connected by a synchronous belt drive.

5. The wastewater treatment equipment for corrugated paper production according to claim 4, characterized in that: The bottom of the water inlet cylinder (6) is fitted with a first support plate (13), the bottom of the first support plate (13) is connected to the inner wall of the sewage tank (1), the side wall of the first support plate (13) is attached to the inner wall of the sewage tank (1), and a second support plate (14) is installed on one side of the sealing plate (12), the bottom of the second support plate (14) is connected to the inner wall of the sewage tank (1).

6. The wastewater treatment equipment for corrugated paper production according to claim 5, characterized in that: The axis of the conveying pipe (41) forms a 30° angle with the horizontal line of the sewage tank (1). The water inlet cylinder (6) and the water separator cylinder (8) are concentrically distributed, and the axis of the water separator cylinder (8) is collinear with the axis of the conveying pipe (41).

7. The wastewater treatment equipment for corrugated paper production according to claim 6, characterized in that: A cleaning component (9) is provided in the middle of the slag discharge port (81). The cleaning component (9) includes at least one scraper (91), which moves vertically to scrape the material from the screen plate (71).

8. The wastewater treatment equipment for corrugated paper production according to claim 7, characterized in that: The cleaning component (9) also includes a fixed base (92), the fixed base (92) has an I-shaped cross-section, the two ends of the fixed base (92) are respectively connected to the inside of the slag outlet (81), scrapers (91) are provided on both sides of the fixed base (92), and a movable opening (93) is provided in the fixed base (92). A toothed roller (94) is movably installed in the movable opening (93). A rack assembly (95) is provided on the side of the scraper (91) near the toothed roller (94). The toothed roller (94) meshes with the rack assembly (95). One end of the toothed roller (94) movably extends to the outside of the sealing plate (12). A second motor (15) for driving the toothed roller (94) to rotate is installed outside the sealing plate (12).

9. A method for treating wastewater in corrugated paper production, using the wastewater treatment equipment described in any one of claims 1-8, characterized in that: include: Wastewater treatment stage: Wastewater in the wastewater tank (1) enters from the bottom of the mixing chamber, is initially filtered by several filter screens (11), and is discharged from the end plate (10). The first motor (52) drives several screens (71) to rotate in a circle, and the scraper (73) scrapes the filter screens (11). The screens (71) rotate in a circle to intercept waste residue. When the waste residue passes above the slag discharge port (81), it falls naturally into the slag discharge basin (44). The first motor (52) drives the spiral conveyor rod (42) to rotate. The waste residue is fed into the conveying pipe (41) and then into the discharge pipe (43) and falls into the collection cylinder (3). Self-cleaning stage: The first motor (52) changes its drive mode and drives several mesh plates (71) to rotate sequentially to the top of the cleaning component (9). At the same time, the second motor (15) drives the toothed roller (94) to rotate in the forward direction and the scraper (91) moves upward to scrape and clean the side wall of the mesh plate (71). The second motor (15) drives the toothed roller (94) to rotate in the reverse direction and the scraper (91) moves downward to reset.

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