Recycling device and method for papermaking concentrated white water

Abstract

The invention belongs to the technical field of papermaking, and discloses a papermaking concentrated white water recycling device which comprises a shell mechanism and further comprises a driving motor installed on one side of the shell mechanism. The transmission mechanism is arranged on an output shaft of the driving motor and rotationally connected to the inner wall of the protective shell, the transmission mechanism comprises a first gear, a second gear, a third gear, a gear ring and a rotating rod, and the first gear is fixedly installed on the output shaft of the driving motor. Through cooperation of the transmission mechanism, the filtering mechanism, the limiting mechanism and other structures, movement of the transmission mechanism drives the limiting mechanism and the cleaning mechanism installed on the limiting mechanism to rotate, and the cleaning mechanism obliquely points to the filter cylinder, so that the speed of papermaking concentrated white water falling down along the feeding pipe to enter the filter screen can be increased through pressure; therefore, the rapid filtering effect is achieved.

Description

Technical Field

[0001] This invention belongs to the field of papermaking technology, specifically a device and method for recycling concentrated white water from papermaking. Background Technology

[0002] Papermaking white water refers to wastewater generated during the pulping and papermaking process, including pulping and cooking waste liquor, washing wastewater, bleaching wastewater, and paper machine white water. Paper machine white water specifically refers to wastewater from the papermaking system, primarily containing large amounts of fine fibers, fillers, and other suspended solids, as well as sizing agents, preservatives, and reinforcing agents. It also contains a significant amount of soluble colloidal substances. While its dissolved COD and BOD levels are relatively low, its suspended solids content is high and varies considerably. The discharge volume of papermaking white water is substantial; untreated discharge not only pollutes the environment but also wastes water resources.

[0003] The recycling and treatment methods for concentrated white water from papermaking mainly include various technologies such as physical, chemical, and biological methods. Filtration is a simple and effective method for white water recycling, removing suspended solids through physical filtration, and has the advantages of low investment and high efficiency. The core of the filtration method lies in the filter element. After prolonged use, the filter element will accumulate many impurities, thereby reducing the filtration effect. It needs to be disassembled for cleaning or replacement, making it unsuitable for long-term use. Disassembly can also be inconvenient. Therefore, improvements are made to address these issues. Summary of the Invention

[0004] To address the problem mentioned in the background art that filter cartridges cannot be used for extended periods when filtering concentrated white water from papermaking, this invention provides a device and method for recycling concentrated white water from papermaking.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a recycling device for concentrated white water from papermaking, comprising a housing mechanism, and further comprising: a drive motor mounted on one side of the housing mechanism; a transmission mechanism disposed on the output shaft of the drive motor and rotatably connected to the inner wall of the protective housing, the transmission mechanism comprising a first gear, a second gear, a third gear, a gear ring, and a rotating rod, the first gear being fixedly mounted on the output shaft of the drive motor, the second gear meshing with the first gear, the third gear meshing with the second gear, the gear ring meshing with the third gear, the second gear and the rotating rod being rotatably connected to the protective housing, the rotating rod being fixedly mounted on the axis of the third gear; a filter mechanism disposed on the housing mechanism; limiting mechanisms connected to the transmission mechanism and symmetrically distributed at both ends of the filter mechanism, the limiting mechanisms comprising a connecting ring and a rotating ring, the rotating ring being fixedly connected to the gear ring, the inner and outer sides of the connecting ring being rotatably connected to the filter mechanism and the rotating ring respectively through sealed bearings; and a cleaning mechanism connected to the inner sides of the two limiting mechanisms and in contact with the filter mechanism.

[0006] Preferably, the filtration mechanism includes a filter cylinder and a discharge pipe. The filter cylinder is fixedly connected to the first gear, and the discharge pipe is rotatably connected to the inner wall of the filter cylinder at the end away from the first gear through a sealed bearing. The end of the filter cylinder near the first gear is closed.

[0007] Preferably, the cleaning mechanism includes a fixed component, a movable block, a spring, and a brush. The fixed component is rotatably connected to the connecting ring. The movable block is slidably connected inside the fixed component. The spring is located inside the fixed component and its two ends are respectively connected to the fixed component and the movable block. The brush is fixedly installed on the side of the movable block away from the spring. The movable block is always in contact with the surface of the filter cartridge.

[0008] Preferably, the connecting ring includes a ring body and a positioning hole and a limiting groove formed on the ring body. The limiting groove is an arc-shaped groove with the positioning hole as the center. The fixing component includes a fixing sleeve block and a connecting shaft and a positioning post installed on the fixing sleeve block. The connecting shaft and the positioning post are symmetrically distributed at both ends of the fixing sleeve block. The connecting shaft is located inside the positioning hole, and the positioning post is slidably connected to the inside of the limiting groove.

[0009] Preferably, the surface of the filter cartridge is provided with holes, and a filter screen is disposed inside the holes.

[0010] Preferably, the housing mechanism includes a protective housing, a waste discharge pipe, and a feed pipe. The feed pipe is installed on the top of the protective housing, the waste discharge pipe is installed on the bottom of the protective housing, and the drive motor is installed on the side of the protective housing. The width of the feed pipe is equal to the distance between the two fixed sleeves closest to the feed pipe. When one of the fixed sleeves contacts the feed pipe, the top of the adjacent fixed sleeve is located below the opposite side of the contact side of the feed pipe.

[0011] Preferably, the discharge pipe extends to one closed end of the filter cartridge, and the end of the discharge pipe inside the filter cartridge is semi-circular with its concave surface facing upwards.

[0012] Preferably, the cleaning mechanism is arranged in a ring on opposite sides of the two connecting rings, and the movable block and brush are in contact with the surface of the filter cartridge under the elastic force of the spring.

[0013] Preferably, the rotating rod rotates in the same direction as the connecting ring, the filter cylinder rotates in the opposite direction to the connecting ring, and the discharge pipe is fixedly connected to the protective shell.

[0014] A method for recycling concentrated white water from papermaking, specifically the recycling process is as follows: S1: Start the drive motor to drive the filter mechanism and limit mechanism through the transmission mechanism; S2: The filter cartridge and the connecting ring rotate in opposite directions, causing the cleaning mechanism to tilt when it is driven past the rotating rod. When it continues to rotate, the cleaning mechanism is squeezed and rotated by the feed pipe, and then tilts in the other direction. S3: Papermaking concentrated white water is injected into the top of the filter cylinder through the feed pipe. The white water is filtered by the filter screen on the surface of the filter cylinder. Impurities are stored on the surface of the filter cylinder and are thrown away by centrifugal force after rotating out of the filtration area. The filtered water falls into the discharge pipe and is discharged away.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes the coordination of a transmission mechanism, a filtration mechanism, and a limiting mechanism. The movement of the transmission mechanism drives the limiting mechanism and the cleaning mechanism mounted on the limiting mechanism to rotate. The cleaning mechanism is tilted towards the filter cylinder, thereby increasing the speed at which the concentrated white water from papermaking falling along the feed pipe enters the filter screen through pressure, thus achieving a rapid filtration effect.

[0016] This invention utilizes a combination of fixed components, movable blocks, and springs to ensure that the movable block fits against the surface of the filter cartridge. The filter cartridge rotates in the opposite direction to the cleaning mechanism, and the movement of the filter cartridge is coordinated with the weight of the white water. When the cleaning mechanism rotates and squeezes the white water, the spring is compressed due to the reaction force, and the movable block enters the fixed component. Excess white water flows along the gap between the movable block and the filter cartridge, and excess white water is also pressed into the filter screen under its own weight. This prevents excessive pressure from causing white water to overflow in the direction of the cleaning mechanism's rotation, thus ensuring effective recycling.

[0017] This invention uses the combination of the limiting groove and the positioning column to restrict the rotation of the fixed sleeve block. The spring is close to the filter cylinder. When the fixed sleeve block is squeezed and flipped by the feed pipe, the filter cylinder and the cleaning mechanism rotate in opposite directions, thus forming a spring to remove impurities from the surface of the filter cylinder. At the same time, it works in conjunction with the centrifugal force of the rotating filter cylinder to promote the separation of impurities. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the outer casing mechanism of the present invention; Figure 3 This is a detailed structural diagram of the transmission mechanism of the present invention; Figure 4 This is a partial view of the internal structure of the outer shell mechanism of the present invention; Figure 5 For the present invention Figure 4 A magnified diagram is shown in section A. Figure 6 This is a detailed structural diagram of the cleaning mechanism of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure of B in the middle; Figure 8 This is a schematic diagram showing the cooperation between the filtration mechanism, the limiting mechanism, and the cleaning mechanism of the present invention; Figure 9 This is a detailed structural diagram of the filtration mechanism of the present invention.

[0019] In the diagram: 1. Outer shell mechanism; 101. Protective outer shell; 102. Waste discharge pipe; 103. Feed pipe; 2. Drive motor; 3. Transmission mechanism; 301. First gear; 302. Second gear; 303. Third gear; 304. Gear ring; 305. Rotating rod; 4. Filtering mechanism; 401. Filter cartridge; 402. Discharge pipe; 5. Limiting mechanism; 501. Connecting ring; 5011. Ring body; 5012. Positioning hole; 5013. Limiting groove; 502. Rotating ring; 6. Cleaning mechanism; 601. Fixing component; 6011. Fixing sleeve; 6012. Connecting shaft; 6013. Positioning post; 602. Movable block; 603. Spring; 604. Brush. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 9As shown, the present invention provides a recycling device for concentrated white water from papermaking, including a housing mechanism 1, and a drive motor 2 installed on one side of the housing mechanism 1; a transmission mechanism 3 disposed on the output shaft of the drive motor 2 and rotatably connected to the inner wall of the protective housing 101, the transmission mechanism 3 including a first gear 301, a second gear 302, a third gear 303, a gear ring 304, and a rotating rod 305, the first gear 301 being fixedly installed on the output shaft of the drive motor 2, the second gear 302 meshing with the first gear 301, the third gear 304 being fixedly installed with the first gear 302, the second gear 302 meshing with the first gear 301, the third gear 305 being fixedly installed with the first gear 302, the second gear 302 meshing with the first gear 301, the third gear 302 being fixedly installed with the first gear 302, the second gear 302 meshing with the first gear 302, the third gear 303 ... 03 meshes with the second gear 302, and the gear ring 304 meshes with the third gear 303. Both the second gear 302 and the rotating rod 305 are rotatably connected to the protective housing 101. The rotating rod 305 is fixedly mounted on the shaft of the third gear 303. A filter mechanism 4 is provided on the housing mechanism 1. Limiting mechanisms 5 are connected to the transmission mechanism 3 and symmetrically distributed at both ends of the filter mechanism 4. The limiting mechanism 5 includes a connecting ring 501 and a rotating ring 502. The rotating ring 502 is fixedly connected to the gear ring 304. The inner and outer sides of the connecting ring 501 are respectively connected via… A sealed bearing is rotatably connected to the filter mechanism 4 and the rotating ring 502; a cleaning mechanism 6 is connected to the inner side of the two limiting mechanisms 5 and in contact with the filter mechanism 4. The filter mechanism 4 includes a filter cylinder 401 and a discharge pipe 402. The filter cylinder 401 is fixedly connected to the first gear 301. The discharge pipe 402 is rotatably connected to the inner wall of the end of the filter cylinder 401 away from the first gear 301 through a sealed bearing. The end of the filter cylinder 401 near the first gear 301 is closed. The surface of the filter cylinder 401 is provided with holes, and a filter screen is provided inside the holes. The structure 1 includes a protective shell 101, a waste discharge pipe 102, and a feed pipe 103. The feed pipe 103 is installed on the top of the protective shell 101, the waste discharge pipe 102 is installed on the bottom of the protective shell 101, and the drive motor 2 is installed on the side of the protective shell 101. The width of the feed pipe 103 is equal to the distance between the two fixing blocks 6011 closest to the feed pipe 103. When one of the fixing blocks 6011 contacts the feed pipe 103, the top of the adjacent fixing block 6011 is located below the opposite side of the contact side of the feed pipe 103. Start the drive motor 2, which drives the first gear 301 to rotate via its output shaft. Since the second gear 302 is rotatably connected to the protective housing 101, and the rotating rod 305 is rotatably connected to the protective housing 101 and fixedly connected to the third gear 303, the rotation of the first gear 301 sequentially drives the second gear 302, the third gear 303, and the gear ring 304 to rotate. Because the gear ring 304 is fixedly connected to the connecting ring 501, and the filter cartridge 401 is fixedly connected to the first gear 301, the cleaning mechanism 6 is also driven to rotate by the connecting ring 501. The cleaning mechanism 6 tilts towards the filter cartridge 401, thereby increasing the speed at which the concentrated white water from papermaking falling along the feed pipe 103 enters the filter screen through pressure, thus achieving a rapid filtration effect; the filtered... White water falls from the filter screen at the top of the filter cylinder 401 into the discharge pipe 402 and is discharged. When the cleaning mechanism 6 passes the feed pipe 103 and is squeezed and tilted in the opposite direction by the feed pipe 103, the impurities on the surface of the filter cylinder 401 are peeled off by the centrifugal force of the rotation of the filter cylinder 401 under the push of the cleaning mechanism 6 and fall into the protective shell 101. Then it can be discharged through the impurity discharge pipe 102. The cleaning mechanism 6, which has been reversed, can be squeezed by the rotating rod 305 and then returned to the correct position during rotation. The rotating rod 305 and the connecting ring 501 rotate in the same direction. When the cleaning mechanism 6 passes the rotating rod 305, the friction of the rotating rod 305 can push the movable block 602 into the fixed component 601, ensuring that the cleaning mechanism 6 can pass the rotating rod 305 smoothly.

[0022] like Figure 6 , 7 As shown in Figure 8, the cleaning mechanism 6 includes a fixed component 601, a movable block 602, a spring 603, and a brush 604. The fixed component 601 is rotatably connected to the inner wall of the connecting ring 501. The movable block 602 is slidably connected to the inside of the fixed component 601. The spring 603 is located inside the fixed component 601 and its two ends are respectively connected to the fixed component 601 and the movable block 602. The brush 604 is fixedly installed on the side of the movable block 602 away from the spring 603. The movable block 602 is always in contact with the surface of the filter cartridge 401. The design of the fixed component 601, movable block 602, and spring 603 allows for telescopic movement, enabling the movable block 602 to conform to the surface of the filter cartridge 401. The filter cartridge 401 rotates in the opposite direction to the cleaning mechanism 6. The movement of the filter cartridge 401 is coordinated with the weight of the white water. When the cleaning mechanism 6 rotates and squeezes the white water, the spring 603 is compressed due to the reaction force, and the movable block 602 enters the interior of the fixed component 601. Excess white water flows downwards and to the left along the gap between the movable block 602 and the filter cartridge 401. Figure 8 As shown in the diagram, excess white water can also be pressed into the filter screen under its own weight, thereby preventing excessive pressure from causing white water to overflow in the direction of the rotation of the cleaning mechanism 6, ensuring the recycling effect. The brush 604 set can further improve the removal effect of impurities.

[0023] like Figure 4 , 5 As shown in Figure 8, the connecting ring 501 includes a ring body 5011 and a positioning hole 5012 and a limiting groove 5013 opened on the ring body 5011. The limiting groove 5013 is an arc-shaped groove with the positioning hole 5012 as the center. The fixing component 601 includes a fixing sleeve 6011 and a connecting shaft 6012 and a positioning post 6013 installed on the fixing sleeve 6011. The connecting shaft 6012 and the positioning post 6013 are symmetrically distributed at both ends of the fixing sleeve 6011. The connecting shaft 6012 is located inside the positioning hole 5012, and the positioning post 6013 is slidably connected to the inside of the limiting groove 5013. The cooperation between the limiting groove 5013 and the positioning post 6013 restricts the rotation of the fixed sleeve 6011. Regardless of how the fixed sleeve 6011 rotates, the spring 603 remains firmly against the filter cartridge 401. When the fixed sleeve 6011 is pressed by the feed pipe 103, the angle between the fixed sleeve 6011 and the surface of the filter cartridge 401 decreases, meaning that after the fixed sleeve 6011 flips, it does not contact the feed pipe 103, thus facilitating its passage. However, when the fixed sleeve 6011 flips, as... Figure 8 The cleaning mechanism 6 shown at the right end has a spring 603 that removes impurities from the surface of the filter cartridge 401 because the filter cartridge 401 rotates in the opposite direction to the cleaning mechanism 6, thus promoting the separation of impurities.

[0024] like Figure 1 , 6 As shown in Figure 9, the discharge pipe 402 extends to the closed end of the filter cylinder 401. The end of the discharge pipe 402 located inside the filter cylinder 401 is semi-circular with the concave surface facing upward. White water falls through the filter screen at the top of the filter cylinder 401, and the semi-circular discharge pipe 402 located inside the filter cylinder 401 can receive it, thus facilitating the discharge of the filtered white water.

[0025] like Figure 3 , 4 As shown in Figure 8, the cleaning mechanism 6 is arranged in a ring on the opposite side of the two connecting rings 501. The movable block 602 and the brush 604 are in contact with the surface of the filter cartridge 401 under the elastic force of the spring 603. The rotating rod 305 rotates in the same direction as the connecting ring 501, while the filter cartridge 401 rotates in the opposite direction to the connecting ring 501. The discharge pipe 402 is fixedly connected to the protective shell 101. Figure 8The two adjacent cleaning mechanisms 6 at both ends of the cleaning mechanism 6 that are in contact with the feed pipe 103 are the positioning columns 6013 located at both ends of the limiting groove 5013. The limiting groove 5013 limits the positioning column 6013 to ensure the rotation range of the fixed sleeve block 6011, so that the movable block 602 can always contact the surface of the filter cartridge 401.

[0026] Working principle and usage process of this invention: Start the drive motor 2, and drive the first gear 301 to rotate through the output shaft of the drive motor 2. When the first gear 301 rotates, it drives the second gear 302, the third gear 303, and the gear ring 304 to rotate in sequence. The gear ring 304 drives the connecting ring 501 to rotate. The cleaning mechanism 6 is also driven to rotate by the connecting ring 501. The cleaning mechanism 6 forms an acute angle with the white water falling area, so that the pressure can promote the speed at which the concentrated white water of papermaking falling along the feed pipe 103 enters the filter screen, thereby achieving the effect of rapid filtration. After filtration, the white water falls along the filter screen at the top of the filter cylinder 401 into the discharge pipe 402 and is discharged. When the cleaning mechanism 6 passes over the feed pipe 103 and is squeezed and tilted in the opposite direction by the feed pipe 103, the impurities on the surface of the filter cylinder 401 are peeled off under the push of the cleaning mechanism 6. At the same time, the centrifugal force of the rotation of the filter cylinder 401 improves the effect of separating impurities. The impurities fall into the protective shell 101 and can then be discharged through the impurity discharge pipe 102. The limiting groove 5013 limits the positioning column 6013 to ensure the rotation range of the fixed sleeve 6011, so that the movable block 602 can always contact the surface of the filter cartridge 401. When the fixed sleeve 6011 is squeezed and flipped by the feed pipe 103, the angle between the fixed sleeve 6011 and the surface of the filter cartridge 401 becomes smaller, that is, the fixed sleeve 6011 does not contact the feed pipe 103 after flipping, thus facilitating the passage of the fixed sleeve 6011. The rotating rod 305 rotates in the same direction as the connecting ring 501. When the cleaning mechanism 6 passes the rotating rod 305, the movable block 602 can be pushed into the fixed component 601 by the friction of the rotating rod 305, ensuring that the cleaning mechanism 6 can pass the rotating rod 305 smoothly. After passing the rotating rod 305, the cleaning mechanism 6 returns to the initial state to press in white water.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for recycling concentrated white water from papermaking, comprising a housing mechanism (1), characterized in that: It also includes, A drive motor (2) is installed on one side of the housing mechanism (1); The transmission mechanism (3) is mounted on the output shaft of the drive motor (2) and rotatably connected to the inner wall of the protective housing (101). The transmission mechanism (3) includes a first gear (301), a second gear (302), a third gear (303), a gear ring (304), and a rotating rod (305). The first gear (301) is fixedly mounted on the output shaft of the drive motor (2). The second gear (302) meshes with the first gear (301). The third gear (303) meshes with the second gear (302). The gear ring (304) meshes with the third gear (303). The second gear (302) and the rotating rod (305) are both rotatably connected to the protective housing (101). The rotating rod (305) is fixedly mounted on the axis of the third gear (303). The filter mechanism (4) is disposed on the outer casing mechanism (1). A limiting mechanism (5) is connected to the transmission mechanism (3) and symmetrically distributed at both ends of the filter mechanism (4). The limiting mechanism (5) includes a connecting ring (501) and a rotating ring (502). The rotating ring (502) is fixedly connected to the toothed ring (304). The inner and outer sides of the connecting ring (501) are rotatably connected to the filter mechanism (4) and the rotating ring (502) respectively through sealed bearings. A cleaning mechanism (6) is connected to the inside of the two limiting mechanisms (5) and in contact with the filtering mechanism (4).

2. The recycling device for concentrated white water from papermaking according to claim 1, characterized in that: The filtration mechanism (4) includes a filter cylinder (401) and a discharge pipe (402). The filter cylinder (401) is fixedly connected to the first gear (301). The discharge pipe (402) is rotatably connected to the inner wall of the end of the filter cylinder (401) away from the first gear (301) through a sealed bearing. The end of the filter cylinder (401) near the first gear (301) is closed.

3. The recycling device for concentrated white water from papermaking according to claim 2, characterized in that: The cleaning mechanism (6) includes a fixed component (601), a movable block (602), a spring (603), and a brush (604). The fixed component (601) is rotatably connected to the connecting ring (501). The movable block (602) is slidably connected inside the fixed component (601). The spring (603) is located inside the fixed component (601) and its two ends are respectively connected to the fixed component (601) and the movable block (602). The brush (604) is fixedly installed on the side of the movable block (602) away from the spring (603). The spring and movable block (602) are always in contact with the surface of the filter cartridge (401).

4. The recycling device for concentrated white water from papermaking according to claim 3, characterized in that: The connecting ring (501) includes a ring body (5011) and a positioning hole (5012) and a limiting groove (5013) opened on the ring body (5011). The limiting groove (5013) is an arc-shaped groove with the positioning hole (5012) as the center. The fixing component (601) includes a fixing sleeve (6011) and a connecting shaft (6012) and a positioning post (6013) installed on the fixing sleeve (6011). The connecting shaft (6012) and the positioning post (6013) are symmetrically distributed at both ends of the fixing sleeve (6011). The connecting shaft (6012) is located inside the positioning hole (5012), and the positioning post (6013) is slidably connected to the inside of the limiting groove (5013).

5. The recycling device for concentrated white water from papermaking according to claim 2, characterized in that: The surface of the filter cartridge (401) is provided with holes, and a filter screen is provided inside the holes.

6. The recycling device for concentrated white water from papermaking according to claim 4, characterized in that: The outer casing mechanism (1) includes a protective casing (101), a waste discharge pipe (102), and a feed pipe (103). The feed pipe (103) is installed on the top of the protective casing (101), the waste discharge pipe (102) is installed on the bottom of the protective casing (101), and the drive motor (2) is installed on the side of the protective casing (101). The width of the feed pipe (103) is equal to the distance between the two fixing blocks (6011) closest to the feed pipe (103). When one of the fixing blocks (6011) contacts the feed pipe (103), the top of the adjacent fixing block (6011) is located below the opposite side of the contact side of the feed pipe (103).

7. The recycling device for concentrated white water from papermaking according to claim 2, characterized in that: The discharge pipe (402) extends to the closed end of the filter cylinder (401). The end of the discharge pipe (402) inside the filter cylinder (401) is semi-circular with the concave surface facing upward.

8. The recycling device for concentrated white water from papermaking according to claim 3, characterized in that: The cleaning mechanism (6) is arranged in a ring on the opposite side of the two connecting rings (501), and the movable block (602) and the brush (604) are in contact with the surface of the filter cartridge (401) under the elastic force of the spring (603).

9. The recycling device for concentrated white water from papermaking according to claim 7, characterized in that: The rotating rod (305) rotates in the same direction as the connecting ring (501), the filter cylinder (401) rotates in the opposite direction to the connecting ring (501), and the discharge pipe (402) is fixedly connected to the protective shell (101).

10. A method for recycling concentrated white water from papermaking, characterized in that, The specific recycling method is as follows: S1: Start the drive motor (2) to drive the filter mechanism (4) and the limiting mechanism (5) through the transmission mechanism (3); S2: The filter cartridge (401) and the connecting ring (501) rotate in opposite directions, causing the cleaning mechanism (6) to tilt when it is driven past the rotating rod (305). When it continues to rotate, the cleaning mechanism (6) is squeezed and rotated by the feed pipe (103), and then tilts in another direction. S3: Papermaking concentrated white water is injected into the top of the filter cylinder (401) through the feed pipe (103). The white water is filtered by the filter screen on the surface of the filter cylinder (401). Impurities are stored on the surface of the filter cylinder (401) and are thrown away by centrifugal force after leaving the filtration area. The filtered water falls into the discharge pipe (402) and is discharged away.

Images