A high-efficiency impurity removal, grading, and screening device for paper pulp.

Abstract

This invention relates to the field of papermaking equipment technology and discloses a high-efficiency impurity removal, grading, and screening device for papermaking pulp. It includes a water collection tank and, sequentially arranged on the water collection tank, a pulp recovery component, an impurity screening mechanism, a metal separation structure, and a feeding structure. The impurity screening mechanism includes a screen mounting frame that can be mounted above the water collection tank and a driving component that controls the left-right swaying of the screen mounting frame. A screening screen is detachably installed inside the screen mounting frame. L-shaped frames are fixedly mounted on both the front and rear sides of the top of the water collection tank. Guide grooves are installed on the inner sides of the L-shaped frames. Guide rails that slide and adapt to the guide grooves are fixedly mounted on both the front and rear side walls of the screen mounting frame. This invention has the following advantages and effects: high impurity removal efficiency, integrated functions, good automation, and easy screen maintenance.

Description

Technical Field

[0001] This invention relates to the field of papermaking equipment technology, and in particular to a high-efficiency impurity removal, grading and screening device for papermaking pulp. Background Technology

[0002] In the paper industry, recycled paper (waste paper) is an important source of fiber. After recycled paper is pulped, the pulp contains a large number of impurities, such as plastic flakes, adhesives (light impurities), sand, glass (heavy impurities), staples, paper clips, and other metal objects. If these impurities are not effectively removed, they will seriously affect paper quality, damage papermaking equipment (such as the wire section and press rolls), and reduce production efficiency.

[0003] Existing slurry purification systems typically consist of multiple independent devices connected in series, such as high-consistency desanders, pressure screens, and vibrating frame flat screens. These systems have long process flows, large equipment footprints, and high energy consumption, and also present challenges in slurry transport and concentration adjustment between different devices. Furthermore, traditional vibrating screens are prone to clogging by fibers or impurities, making cleaning and replacement inconvenient and affecting continuous production. Therefore, it is necessary to propose a compact, functionally integrated, and easy-to-operate and maintain high-efficiency impurity removal, grading, and screening device to address these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency impurity removal, grading and screening device for paper pulp, which has the advantages of high impurity removal efficiency, integrated functions, good automation and easy screen maintenance.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a high-efficiency impurity removal, grading and screening device for papermaking pulp, comprising a water collection tank and a pulp recycling component, an impurity screening mechanism, a metal separation structure and a feeding structure arranged sequentially on the water collection tank. The impurity screening mechanism includes a screen mounting frame that can be set above the water collection tank and a driving component for controlling the left and right swaying of the screen mounting frame. A screening screen is detachably installed inside the screen mounting frame. L-shaped frames are fixedly installed on the front and rear sides of the top of the water collection tank. A guide groove is installed on the inner side of the L-shaped frame. Guide rails that slide and adapt to the guide grooves are fixedly installed on the front and rear side walls of the screen mounting frame.

[0006] By adopting the above technical solution, the functions of impurity removal, screening, and slurry recovery are integrated into one, resulting in a compact process. Heavy impurities (such as sand and gravel) in the slurry are intercepted on the screening screen, while good slurry and water pass through the screen into the collection tank below. The screen mounting frame achieves stable reciprocating swaying through the cooperation of guide rails and guide grooves, effectively preventing screen hole blockage and improving screening efficiency.

[0007] A further configuration of the present invention is as follows: the driving component includes a bracket fixedly mounted on the top left side of the water collection tank, a first motor is mounted on the bracket, a rotating rod is mounted on the output end of the first motor, a turntable is fixedly mounted on the other end of the rotating rod, a protruding post is mounted on the side of the turntable, and a connecting frame is hinged between the protruding post and the screen mounting frame.

[0008] By adopting the above technical solution, the first motor drives the rotating rod and the turntable to rotate at a constant speed. Through the convex column and the linkage frame on it, the rotational motion is converted into the horizontal reciprocating linear motion of the screen mounting frame. The structure is simple and reliable, and the vibration frequency can be adjusted by the motor speed.

[0009] A further feature of the present invention is that: each of the four corners of the screen mounting frame is provided with a positioning member for fixing the screen, the positioning member includes a fixing post fixedly installed in the screen mounting frame, and a pressure plate for pressing the screen and a spring are slidably provided on the outside of the fixing post.

[0010] By adopting the above technical solution, when the screening screen needs to be replaced or cleaned, simply lift the pressure plate to compress the spring, remove the old screen, put in the new screen, and then release the pressure plate. The spring force will cause the pressure plate to automatically press the screen edge. This quick-release structure greatly simplifies maintenance operations and shortens downtime.

[0011] A further embodiment of the present invention is that the metal separation structure includes a separation chamber fixed between two L-shaped frames, a grid-shaped magnetic rod is slidably disposed in the separation chamber, fixed rails are installed on both sides of the inner cavity of the separation chamber, sliding grooves adapted to the fixed rails are provided on both sides of the grid-shaped magnetic rod, and a handle is installed on one side of the grid-shaped magnetic rod outside the separation chamber.

[0012] By adopting the above technical solution, the slurry passes through the metal separation structure before flowing into the impurity screening mechanism. The grid-shaped magnetic rod can adsorb ferromagnetic metal impurities in the slurry. When cleaning is required, the operator can pull the magnetic rod out of the separation chamber as a whole through the external handle along the fixed rail, remove the adsorbed metal objects, and then push it back, realizing online cleaning without stopping the machine.

[0013] A further feature of the present invention is that the feeding structure includes a feed inlet slidably disposed above the separation chamber, the separation chamber is provided with a reciprocating structure for controlling the left and right sliding of the feed inlet, and two dispersing blades are rotatably disposed inside the feed inlet.

[0014] By adopting the above technical solution, the feed inlet can slide left and right, so that the slurry can be evenly distributed on the entire width of the screening screen below, avoiding local overload. The built-in dispersing blades can pre-disperse the fiber clumps in the slurry to prevent them from directly clogging the screen holes and improve the screening effect.

[0015] A further provision of the present invention is that the reciprocating structure includes a reciprocating screw and a fixed rod disposed on the side of the feed inlet, and movable blocks are respectively screw-connected to the reciprocating screw and slidably connected to the fixed rod on both sides of the feed inlet.

[0016] By adopting the above technical solution, when the reciprocating screw rotates, it drives the feed port to make a stable reciprocating linear motion along the fixed rod through the screw cooperation with the moving block, resulting in uniform material distribution and precise motion trajectory.

[0017] A further configuration of the present invention is as follows: racks are fixedly mounted on both sides of the top of the separation chamber, a worm is rotatably mounted on the outer wall of the feed inlet, a worm wheel adapted to the worm is installed at the end of the dispersing blade, and a rotating gear adapted to the rack is installed at both ends of the worm.

[0018] By adopting the above technical solution, when the feed inlet moves left and right, the rotating gear on its outer wall will mesh with the fixed rack, thereby driving the worm to rotate. The worm then drives the worm wheel that meshes with it to rotate, ultimately driving the dispersing blades to work. This design is extremely ingenious, so that the power of the dispersing blades comes entirely from the movement of the feed inlet itself, without the need for an additional motor. It realizes pure mechanical kinetic energy transmission and functional linkage, which is energy-saving and reliable.

[0019] A further feature of the present invention is that a connecting rod is rotatably connected to the top of the bracket, a first bevel gear structure is installed between the connecting rod and the reciprocating lead screw, and a second bevel gear structure is installed between the connecting rod and the rotating rod.

[0020] By adopting the above technical solution, the power of the screen drive component (first motor) is transmitted to the connecting rod through the rotating rod and the second bevel gear structure, and then the reciprocating screw is driven to rotate through the first bevel gear structure. This makes the swaying of the screen and the feeding movement of the feed inlet driven by the same motor and mechanically synchronized, ensuring the coordination of the whole machine's movements and further reducing energy consumption and control system complexity.

[0021] A further configuration of the present invention is as follows: the pulp recycling assembly includes a water-filtering conveyor belt, a main gear is installed on the output end of the right side of the water-filtering conveyor belt, a pressure roller is installed on the top of the water collection tank located on the right side of the water-filtering conveyor belt, a driven gear adapted to the main gear is installed at the end of the pressure roller, and a scraping structure is also provided at the right end of the water-filtering conveyor belt.

[0022] By adopting the above technical solution, the screened good pulp and water mixture falls into the water collection tank and is retrieved by the filter-type transmission belt. The pressure roller is passively rotated by meshing with the gear of the transmission belt, squeezing and dewatering the wet pulp on the belt. This design structure is ingenious, using the filter belt's own power to drive the pressure roller, thus achieving the initial dewatering of the recycled pulp.

[0023] A further feature of the present invention is that the scraping structure includes a connecting frame installed at the right end of the water collection tank, a scraper blade that fits against the end face of the water-filtering transmission belt is rotatably mounted on the connecting frame, and a coil spring is provided at both ends of the scraper blade.

[0024] By adopting the above technical solution, the dewatered slurry adheres to the surface of the transmission belt. At the turning point of the transmission belt, it is scraped off and collected by a scraper. The coil spring provides continuous elastic clamping force to the scraper, ensuring that the scraper can closely fit the surface of the transmission belt, adapting to the slight vibrations or unevenness that may occur in the transmission belt, and ensuring that the scraping is clean and thorough.

[0025] The beneficial effects of this invention are:

[0026] 1. This invention ingeniously integrates multiple processes such as metal separation, slurry dispersion, impurity screening, and slurry recovery and dewatering into a compact device. The entire purification process can be completed by the unidirectional flow of the slurry from top to bottom, which greatly shortens the process route, reduces the equipment footprint and slurry transfer energy consumption, and makes the device highly integrated and the process efficient and continuous.

[0027] 2. This invention, through a gear-rack-worm gear mechanical structure, enables the reciprocating movement of the feed inlet to automatically drive the rotation of the internal dispersing blades, achieving "one movement driving two movements"; at the same time, the power of the screen shaking is transmitted to the feed inlet drive mechanism through a bevel gear set, realizing that the core actions of the entire machine are driven and synchronized by a single motor, which greatly simplifies electrical control, reduces energy consumption and equipment costs, reflects a high degree of mechanical design wisdom, and makes the device more energy-efficient and intelligent;

[0028] 3. In this invention, the screen adopts a spring-loaded quick-release structure, and the magnetic rod uses a drawer-type slide rail design, both of which enable quick disassembly and online cleaning, minimizing equipment maintenance downtime and ensuring continuous production. Different screen sizes can be replaced to adapt to different slurry and impurity grading requirements, making the device easy to maintain and highly adaptable. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0030] Figure 1 This is an overall structural diagram of a high-efficiency impurity removal, grading, and screening device for papermaking pulp according to the present invention.

[0031] Figure 2 This is the present invention. Figure 1 Structural diagram of the separation chamber.

[0032] Figure 3 This is the present invention. Figure 2 A diagram showing the installation structure of the grid-like magnetic rods.

[0033] Figure 4 This is the present invention. Figure 1 Structural diagram of the impurity screening mechanism.

[0034] Figure 5 This is the present invention. Figure 4 Structural diagram of the center positioning component.

[0035] Figure 6 This is the present invention. Figure 2 Structural diagram of the central feed inlet.

[0036] Figure 7 This is the present invention. Figure 1 Structural diagram of the pulp recycling unit.

[0037] In the diagram, 1. Water collection tank; 2. Pulp recycling assembly; 21. Filter-type transmission belt; 22. Main gear; 23. Pressure roller; 24. Driven gear; 25. Connecting frame; 26. Scraper; 27. Coil spring; 3. Impurity screening mechanism; 31. Screen mounting frame; 32. Screening screen; 33. L-shaped frame; 34. Guide groove; 35. Guide rail; 36. Support; 37. First motor; 38. Rotating rod; 39. Turntable; 310. Protruding column; 311. Linkage frame; 312. 313. Fixed column; 314. Pressure plate; 4. Spring; 5. Metal separation structure; 41. Separation chamber; 42. Grid-shaped magnetic rod; 43. Fixed rail; 44. Handle; 5. Feeding structure; 51. Feed inlet; 52. Dispersing blade; 53. Reciprocating screw; 54. Fixed rod; 55. Moving block; 56. Rack; 57. Worm; 58. Worm wheel; 59. Rotating gear; 510. Connecting rod; 511. First bevel gear structure; 512. Second bevel gear structure. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] like Figures 1-7As shown, a high-efficiency impurity removal, grading, and screening device for papermaking pulp includes a water collection tank 1 and a pulp recycling component 2, an impurity screening mechanism 3, a metal separation structure 4, and a feeding structure 5 sequentially arranged on the water collection tank 1. The impurity screening mechanism 3 includes a screen mounting frame 31 that can be mounted above the water collection tank 1 and a driving component that controls the left and right swaying of the screen mounting frame 31. A screening screen 32 is detachably installed inside the screen mounting frame 31. L-shaped frames 33 are fixedly installed on both the front and rear sides of the top of the water collection tank 1. The L-shaped frame 33 has a guide groove 34 installed on its inner side, and the front and rear side walls of the screen mounting frame 31 are both fixed with guide rails 35 that slide and adapt to the guide groove 34. The functions of impurity removal, screening, and slurry recovery are integrated into one, and the process is compact. Heavy impurities such as sand and gravel in the slurry are intercepted on the screening screen 32, and good slurry and water enter the water collection tank 1 below through the screen. The screen mounting frame 31 achieves stable reciprocating shaking through the cooperation of the guide rails 35 and the guide groove 34, which effectively prevents the screen holes from clogging and improves the screening efficiency.

[0040] like Figure 4 As shown, the driving component includes a bracket 36 fixedly mounted on the top left side of the water collection tank 1. A first motor 37 is mounted on the bracket 36. A rotating rod 38 is mounted on the output end of the first motor 37. A turntable 39 is fixedly mounted on the other end of the rotating rod 38. A protruding post 310 is mounted on the side of the turntable 39. A connecting frame 311 is hinged between the protruding post 310 and the screen mounting frame 31.

[0041] When the first motor 37 is started, its output shaft drives the rotating rod 38 and the turntable 39 fixed on it to rotate. The protrusions 310 provided on the side of the turntable 39 rotate with the turntable, and through the linkage frame 311 hinged to it, the rotational motion is converted into a stable horizontal reciprocating motion of the screen mounting frame 31 along the guide rail 35 and the guide groove 34, thereby realizing the mechanical vibration screening of the screening screen 32.

[0042] like Figure 5 As shown, the four corners of the screen mounting frame 31 are provided with positioning components for fixing the screen 32. The positioning components include fixing posts 312 fixed in the screen mounting frame 31, and the outside of the fixing posts 312 is slidably provided with pressing plates 313 for pressing the screen 32 and a spring 314 sleeved on them.

[0043] The four corners of the screening screen 32 are fixed by quick-release positioning parts. When the screen needs to be replaced, simply lift the pressure plate 313 upward to compress the spring 314 to remove the old screen. After inserting the new screen, release the pressure plate 313. The rebound force of the spring 314 will cause the pressure plate to automatically reset and press tightly against the flange of the screen edge. The process does not require any tools.

[0044] like Figure 2 , Figure 3As shown, the metal separation structure 4 includes a separation chamber 41 fixed between two L-shaped frames 33. A grid-shaped magnetic rod 42 is slidably arranged inside the separation chamber 41. Fixed rails 43 are installed on both sides of the inner cavity of the separation chamber 41. Sliding grooves adapted to the fixed rails 43 are provided on both sides of the grid-shaped magnetic rod 42. A handle 44 is installed on one side of the grid-shaped magnetic rod 42 outside the separation chamber 41.

[0045] The grid-shaped magnetic rod 42 is inserted into the separation chamber 41 through the sliding grooves on both sides that are adapted to the fixed rail 43. During operation, the slurry flows over its surface and ferromagnetic metal impurities are adsorbed. The entire magnetic rod 42 can be pulled out and cleaned periodically by pulling out the external handle 44. After cleaning, it can be pushed back, realizing online maintenance without stopping the machine.

[0046] like Figure 2 , Figure 3 , Figure 4 , Figure 6 As shown, the feeding structure 5 includes a feed inlet 51 slidably disposed above the separation chamber 41. The separation chamber 41 is provided with a reciprocating structure for controlling the left and right sliding of the feed inlet 51. Two dispersing blades 52 are rotatably disposed inside the feed inlet 51. The reciprocating structure includes a reciprocating screw 53 and a fixed rod 54 disposed on the side of the feed inlet 51. Moving blocks 55 are respectively installed on both sides of the feed inlet 51, which are helically connected to the reciprocating screw 53 and slidably connected to the fixed rod 54. Racks 56 are fixedly mounted on both sides of the top of the separation chamber 41. A worm gear 57 is rotatably disposed on the outer wall of the feed inlet 51. Worm wheels 58 adapted to the worm gear 57 are installed at the ends of the dispersing blades 52. Rotating gears 59 adapted to the racks 56 are installed at both ends of the worm gear 57.

[0047] The feed inlet 51 is mounted on the reciprocating screw 53 and the fixed rod 54 via movable blocks 55 at both ends. When the reciprocating screw 53 rotates, it drives the feed inlet 51 to slide left and right at a uniform speed, so that the slurry is evenly spread on the screen below. The dispersing blades 52 inside the feed inlet 51 are automatically rotated through a worm gear mechanism. The power comes from its ingenious pure mechanical transmission: the rack 56 fixed on the top of the separation chamber 41 meshes with the rotating gear 59 on the side wall of the feed inlet 51. When the feed inlet 51 moves, the rotating gear 59 rotates accordingly, driving the worm 57, which in turn drives the worm wheel 58 that meshes with it, and finally drives the two dispersing blades 52 to rotate, so as to pre-disperse the fiber clumps.

[0048] like Figure 4 As shown, a connecting rod 510 is rotatably connected to the top of the bracket 36. A first bevel gear structure 511 is installed between the connecting rod 510 and the reciprocating lead screw 53, and a second bevel gear structure 512 is installed between the connecting rod 510 and the rotating rod 38.

[0049] The rotating rod 38 that drives the screen to vibrate transmits part of the power to a horizontally arranged connecting rod 510 through a second bevel gear structure 512. The other end of this connecting rod 510 is connected to the reciprocating screw 53 that drives the feed inlet 51 to move through a first bevel gear structure 511. Therefore, by simply starting the main first motor 37, the reciprocating vibration of the screen, the left and right reciprocating movement of the feed inlet, and the rotation of the dispersing blades inside the feed inlet can be driven synchronously via rack and pinion transmission, greatly simplifying the equipment structure and control system and realizing an energy-saving and efficient integrated design.

[0050] like Figure 7 As shown, the pulp recycling assembly 2 includes a water-filtering conveyor belt 21. A main gear 22 is installed on the output end of the right side of the water-filtering conveyor belt 21. A pressure roller 23 is installed on the top of the water collection tank 1 on the right side of the water-filtering conveyor belt 21. A driven gear 24 adapted to the main gear 22 is installed at the end of the pressure roller 23. A scraping structure is also provided at the right end of the water-filtering conveyor belt 21. The scraping structure includes a connecting frame 25 installed at the right end of the water collection tank 1. A scraper 26 that fits against the end face of the water-filtering conveyor belt 21 is rotatably mounted on the connecting frame 25. A coil spring 27 is provided at both ends of the scraper 26.

[0051] The slurry mixture falling into the collection tank 1 is scooped up by the circulating filter conveyor belt 21 and conveyed upwards. At the upper part of the conveyor belt 21, the main gear 22 meshes with the driven gear 24, driving the pressure roller 23 to rotate passively, thereby squeezing and dewatering the wet slurry adhering to the surface of the conveyor belt. The scraper structure located at the turning end of the conveyor belt 21 has scraper blades 26 that are always in close contact with the surface of the conveyor belt under the action of coil springs 27 at both ends, scraping off and collecting the dewatered dry slurry layer.

Claims

1. A high-efficiency impurity removal, grading, and screening device for papermaking pulp, characterized in that: The system includes a water collection tank (1) and a pulp recycling assembly (2), an impurity screening mechanism (3), a metal separation structure (4), and a feeding structure (5) arranged sequentially on the water collection tank (1). The impurity screening mechanism (3) includes a screen mounting frame (31) that can be set above the water collection tank (1) and a drive component that controls the left and right swaying of the screen mounting frame (31). A screen (32) is detachably installed inside the screen mounting frame (31). L-shaped frames (33) are fixedly installed on the front and rear sides of the top of the water collection tank (1). A guide groove (34) is installed on the inner side of the L-shaped frame (33). Guide rails (35) that slide and adapt to the guide grooves (34) are fixedly installed on the front and rear side walls of the screen mounting frame (31).

2. The high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 1, characterized in that: The driving component includes a bracket (36) fixedly mounted on the top left side of the water collection tank (1), a first motor (37) is mounted on the bracket (36), a rotating rod (38) is mounted on the output end of the first motor (37), a turntable (39) is fixedly mounted on the other end of the rotating rod (38), a protruding post (310) is mounted on the side of the turntable (39), and a connecting frame (311) is hinged between the protruding post (310) and the screen mounting frame (31).

3. The high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 2, characterized in that: The four corners of the screen mounting frame (31) are provided with positioning components for fixing the screen (32). The positioning components include fixing posts (312) fixed in the screen mounting frame (31). The fixing posts (312) are slidably provided with pressure plates (313) for pressing the screen (32) and springs (314) sleeved on the outside.

4. The high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 2, characterized in that: The metal separation structure (4) includes a separation chamber (41) fixed between two L-shaped frames (33). A grid-shaped magnetic rod (42) is slidably arranged in the separation chamber (41). Fixed rails (43) are installed on both sides of the inner wall of the separation chamber (41). Sliding grooves adapted to the fixed rails (43) are provided on both sides of the grid-shaped magnetic rod (42). A handle (44) is installed on one side of the grid-shaped magnetic rod (42) outside the separation chamber (41).

5. The high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 4, characterized in that: The feeding structure (5) includes a feed inlet (51) that is slidably disposed above the separation chamber (41). The separation chamber (41) is provided with a reciprocating structure that controls the left and right sliding of the feed inlet (51). Two dispersing blades (52) are rotatably disposed inside the feed inlet (51).

6. The high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 5, characterized in that: The reciprocating structure includes a reciprocating screw (53) and a fixed rod (54) disposed on the side of the feed inlet (51). On both sides of the feed inlet (51), there are movable blocks (55) that are helically connected to the reciprocating screw (53) and slidably connected to the fixed rod (54).

7. The high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 6, characterized in that: The top of the separation chamber (41) is fixed with racks (56) on both sides, the outer wall of the feed inlet (51) is rotatably provided with a worm (57), the end of the dispersing blade (52) is equipped with a worm wheel (58) adapted to the worm (57), and both ends of the worm (57) are equipped with rotating gears (59) adapted to the rack (56).

8. The high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 7, characterized in that: The top of the bracket (36) is rotatably connected to a connecting rod (510), and a first bevel gear structure (511) is installed between the connecting rod (510) and the reciprocating screw (53), and a second bevel gear structure (512) is installed between the connecting rod (510) and the rotating rod (38).

9. The high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 1, characterized in that: The pulp recycling assembly (2) includes a water-filtering conveyor belt (21), a main gear (22) is installed on the output end of the right side of the water-filtering conveyor belt (21), a pressure roller (23) is installed on the top of the water collection tank (1) located on the right side of the water-filtering conveyor belt (21), a driven gear (24) adapted to the main gear (22) is installed at the end of the pressure roller (23), and a scraping structure is also provided at the right end of the water-filtering conveyor belt (21).

10. A high-efficiency impurity removal, grading, and screening device for papermaking pulp according to claim 9, characterized in that: The scraping structure includes a connecting frame (25) installed at the right end of the water collection tank (1). A scraper (26) that fits the end face of the water filter transmission belt (21) is rotatably mounted on the connecting frame (25). Coil springs (27) are provided at both ends of the scraper (26).

Images