Paper pulp wastewater treatment device for handmade paper production line

Abstract

A disclosed paper pulp wastewater treatment apparatus for a handmade paper production line comprises a standing sedimentation tank, the top end of the standing sedimentation tank is provided with a top water inlet tank, one side of the top water inlet tank is provided with a water inlet pipe, and the top water inlet tank is provided with a wastewater filtering mechanism; the wastewater filtering mechanism comprises a rotating groove coaxially formed in the inner bottom wall of the top water inlet pool, a multi-time filtering piece is arranged on the inner side of the rotating groove and comprises a rotating cylinder rotationally installed on the inner side of the rotating groove, a rotating sealing ring is arranged between the outer wall of the rotating cylinder and the inner wall of the rotating groove, and two limiting plates are installed in the circumferential direction of the rotating cylinder; the limiting plate is used for limiting the rotating cylinder; in the working process, when wastewater enters the rotating cylinder through the arrangement, large impurities are filtered at the large-diameter filter holes, fiber impurities are filtered at the small-diameter filter holes, and finally the wastewater is discharged into the standing sedimentation tank to be subjected to flocculation standing sedimentation, so that three filters are connected in series, and the wastewater filtering treatment effect is improved.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically a pulp wastewater treatment device for a handmade paper production line. Background Technology

[0002] Handmade paper, as a distinctive product that carries traditional intangible cultural heritage techniques, is made from natural plants such as mulberry bark, wheat straw, and bamboo through multiple processes including soaking, steaming, pulping, papermaking, and pressing. The production process generates a large amount of pulp wastewater, which has become a key bottleneck restricting the green and sustainable development of the handmade paper industry. Handmade paper production is both traditional and unique, resulting in wastewater with complex and fluctuating composition. Key pollutants include natural polymers such as pulp fibers, lignin, and hemicellulose, as well as paper additives (such as polyacrylamide and modified starch) and cooking alkali. This leads to wastewater characterized by high CODcr concentrations, high suspended solids content, high viscosity, and poor biodegradability. In some handmade paper production lines, the CODcr concentration can reach as high as 25,000 mg / L. Direct discharge would severely pollute surrounding water bodies and soil, damaging the ecological environment. Currently, the treatment of pulp wastewater from handmade paper production lines generally involves filtration using multi-screen filters to remove impurities of different sizes. However, this method has the following drawbacks: Because the filter screen is fixed, impurities in the wastewater easily adhere to the surface of the filter screen when the wastewater passes through. The filter screen at the same height as the water flow may be quickly blocked. The filter holes at the higher part of the filter screen need to wait for impurities to accumulate at the lower filter screen before the water flow height can increase before the filtration work can be performed. This causes the lower filter holes to become blocked, reducing the filtration efficiency and slowing down the wastewater treatment speed. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the present invention provides a pulp wastewater treatment device for handmade paper production lines, which effectively solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a pulp wastewater treatment device for a handmade paper production line, comprising a settling tank, a top water inlet tank installed at the top of the settling tank, a water inlet pipe installed on one side of the top water inlet tank, and a wastewater filtration mechanism installed on the top water inlet tank. The wastewater filtration mechanism includes a rotating trough coaxially formed on the bottom wall of the top inlet pool, with multiple filter elements arranged on the inner side of the rotating trough; The multiple filter element includes a rotating cylinder rotatably installed inside the rotating groove. A rotating sealing ring is provided between the outer wall of the rotating cylinder and the inner wall of the rotating groove. Two limiting plates are installed in the circumferential direction of the rotating cylinder, and the limiting plates are used to limit the rotation of the rotating cylinder. Large-diameter filter holes are evenly distributed on the rotating drum. These large-diameter filter holes are used to filter out larger impurities in the pulp wastewater. A baffle is fixedly installed inside the rotating cylinder. The baffle is flush with the bottom plate of the top water inlet tank. A middle cylinder is coaxially installed at the bottom end of the baffle. Small diameter filter holes are evenly opened around the circumference of the middle cylinder. The small diameter filter holes are used to filter paper fibers in pulp wastewater. The rotating cylinder is equipped with a rotation drive component, and the inner side of the middle cylinder is equipped with a filter control component.

[0005] Preferably, the bottom of the rotating cylinder is provided with a base support, and a fixing frame is symmetrically installed between the base support and the top water inlet pool. A drain pipe is eccentrically installed at the bottom end of the base support.

[0006] Preferably, the top of the rotating cylinder is provided with symmetrical impurity removal grooves, and a top cover is bolted to the impurity removal groove.

[0007] Preferably, the rotation drive includes a bottom shaft coaxially mounted at the bottom end of the middle cylinder, the bottom shaft extending through to the bottom support, fan blades mounted at equal angles on the axial direction of the bottom shaft, the fan blades being located below the drain pipe, crossbars symmetrically mounted on both sides of the rotating cylinder, the crossbars being located inside the top water inlet pool, sled rods being equidistantly mounted at the bottom end of the crossbars, and a height positioning component being provided inside the bottom shaft.

[0008] Preferably, the filter control component includes a stop block disposed inside the middle cylinder, a top plate disposed above the stop block, a cone block disposed above the top plate, a pull rod fixedly installed at the top of the cone block, the top of the pull rod extending through to the top of the rotating cylinder, a movable groove being formed inside the stop block, a movable plate being movably installed inside the movable groove, two guide rods being symmetrically installed at the top of the movable plate, the tops of the guide rods being fixedly connected to the top plate, support springs being symmetrically installed at the bottom of the movable plate, the bottoms of the support springs being fixedly connected to the inner bottom wall of the movable groove, and a locking connector being provided between the stop block and the cone block.

[0009] Preferably, a bottom rod is fixedly installed at the bottom end of the stop block. A longitudinal cavity is opened inside the bottom rod, and the longitudinal cavity is connected to the movable groove. A transverse groove is symmetrically opened on both sides of the bottom end of the longitudinal cavity. A transverse positioning rod is movably installed inside the transverse groove. A movable block is movably installed inside the longitudinal cavity. Two connecting rods are symmetrically hinged at the bottom end of the movable block, and the bottom ends of the two connecting rods are respectively hinged to the two transverse positioning rods.

[0010] Preferably, a double-sided toothed plate is fixedly installed at the top of the movable block, and a single-sided toothed plate is symmetrically arranged on both sides of the double-sided toothed plate. The single-sided toothed plate is fixedly installed at the bottom of the movable plate, and a gear is meshed between the single-sided toothed plate and the double-sided toothed plate. The gear is rotatably installed inside the longitudinal cavity.

[0011] Preferably, the height positioning component includes a rod groove formed inside the bottom shaft, the bottom rod is inserted into the rod groove, and annular positioning grooves are formed at equal intervals on the inner wall of the rod groove, and the transverse positioning rod is inserted into the annular positioning groove.

[0012] Preferably, the locking connector includes a limiting shaft coaxially mounted on the bottom end of the cone block, a rotating plate symmetrically mounted on the bottom end of the limiting shaft, a locking block mounted on the rotating plate, a fixing plate symmetrically mounted on the top end of the block, and a locking groove provided on the fixing plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1) During operation, when wastewater enters the rotating drum, it is filtered for larger impurities at the large-diameter filter holes, and for fibrous impurities at the small-diameter filter holes. Finally, it is discharged into the settling tank for flocculation and settling, thus realizing three filters in series and improving the wastewater filtration and treatment effect. 2) During operation, the bottom support is fixedly connected to the top water inlet pool, so that the water discharged into the set sedimentation tank is fixed in position and located above the fan blades. Under the impact of the water flow, the fan blades are pushed, which drives the rotating cylinder to rotate as a whole. This in turn drives the crossbar and the climbing bar to move in the top water inlet pool, which moves larger impurities in the top water inlet pool, ensuring smooth filtration of the large diameter filter holes and improving filtration efficiency. 3) During operation, the filter control components are installed in the middle cylinder. During the filtration of fibers, the baffle moves slowly downward, causing the small-diameter filter holes to open continuously from top to bottom. This prevents the small-diameter filter holes from being blocked from bottom to top, which would cause wastewater to accumulate in the middle cylinder. It facilitates wastewater discharge and effectively extends the service life of the small-diameter filter holes. It also prevents the filter holes from being completely blocked quickly when fully opened during filtration, thus improving the filtration utilization rate of the filter holes. 4) During operation, the drainage speed is slowed down by blocking the small diameter filter holes above the cone block. The water pressure above the cone block increases and pushes it downward. Then, through various transmission structures, the horizontal positioning rod moves and disengages from the annular positioning groove. After the block moves downward a certain distance, the horizontal positioning rod moves outward to fix the position of the block again. This allows the small diameter filter holes to open continuously from top to bottom according to the amount of fiber impurities in the wastewater, thereby improving filtration efficiency. 5) During operation, the set pull rod pushes the cone block downward to disengage the transverse positioning rod from the annular positioning groove. Then, the pull rod rotates to make the locking block engage in the groove. Then, the stop block is pulled upward to push the filtered fibers that adhere to the inner wall of the middle cylinder into the upper part of the partition for easy fiber collection and processing. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of a pulp wastewater treatment device for a handmade paper production line according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the settling tank and the top inlet tank of the present invention; Figure 3 This is a schematic diagram of the connection structure between the multiple filter element and the top water inlet tank of the present invention; Figure 4 This is a schematic diagram of the structure of the multiple-filter element of the present invention; Figure 5 This is a schematic diagram of the filter control component structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the stop block of the present invention; Figure 7 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 8 For the present invention Figure 6 Enlarged structural diagram at point B.

[0016] In the diagram: 1. Sedimentation tank; 2. Top inlet tank; 3. Inlet pipe; 4. Wastewater filtration mechanism; 401. Rotary trough; 402. Base support; 403. Fixing frame; 404. Drain pipe; 405. Multiple filter elements; 4051. Rotating cylinder; 4052. Limiting plate; 4053. Impurity removal trough; 4054. Top cover; 4055. Large-diameter filter holes; 4056. Baffle plate; 4057. Middle cylinder; 4058. Small-diameter filter holes; 406. Rotation drive element; 4061. Bottom shaft; 4062. Fan blade; 4063. Crossbar; 4064. Plow rod; 407. Filtration control element; 4071. Stop block; 4072. Top plate; 4073. 4074. Cone block; 4075. Tie rod; 4076. Bottom rod; 4077. Movable groove; 4078. Movable plate; 4079. Guide rod; 40710. Support spring; 40711. Longitudinal cavity; 40712. Transverse groove; 40713. Transverse positioning rod; 40714. Movable block; 40715. Connecting rod; 40716. Double-sided toothed plate; 40717. Single-sided toothed plate; 40718. Gear; 408. Height positioning component; 4081. Rod groove; 4082. Annular positioning groove; 409. Locking connector; 4091. Limiting shaft; 4092. Rotating plate; 4093. Locking block; 4094. Fixing plate; 4095. Locking groove. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0018] Example 1, by Figure 1-8 The present invention relates to a pulp wastewater treatment device for a handmade paper production line, comprising a settling tank 1, a top water inlet tank 2 installed at the top of the settling tank 1, a water inlet pipe 3 installed on one side of the top water inlet tank 2, and a wastewater filtration mechanism 4 installed on the top water inlet tank 2.

[0019] The wastewater filtration mechanism 4 includes a rotating trough 401 coaxially opened on the bottom wall of the top water inlet pool 2, and multiple filter elements 405 are provided on the inner side of the rotating trough 401. The multiple-stage filter element 405 includes a rotating cylinder 4051 rotatably mounted inside the rotating groove 401. A rotating sealing ring is provided between the outer wall of the rotating cylinder 4051 and the inner wall of the rotating groove 401. Two limiting plates 4052 are installed circumferentially on the rotating cylinder 4051 to limit the rotation of the rotating cylinder 4051. Large-diameter filter holes 4055 are evenly opened on the rotating cylinder 4051 to filter larger impurities in the pulp wastewater. A partition plate 4056 is fixedly installed inside the rotating cylinder 4051. 6 is flush with the bottom plate of the top water inlet tank 2. The bottom end of the partition plate 4056 is coaxially installed with the middle cylinder 4057. Small diameter filter holes 4058 are evenly opened in the circumference of the middle cylinder 4057. The small diameter filter holes 4058 are used to filter paper fibers in pulp wastewater. When the wastewater enters the rotating cylinder 4051, larger impurities are filtered at the large diameter filter holes 4055, and fiber impurities are filtered at the small diameter filter holes 4058. Finally, it is discharged into the settling tank 1 for flocculation and settling, realizing three filters in series to improve the wastewater filtration treatment effect. A rotation drive component 406 is provided on the rotating cylinder 4051, a filter control component 407 is provided on the inner side of the middle cylinder 4057, and a symmetrical impurity removal groove 4053 is provided on the top of the rotating cylinder 4051. A top cover 4054 is bolted to the impurity removal groove 4053.

[0020] The bottom of the rotating cylinder 4051 is provided with a base support 402, and a fixing frame 403 is symmetrically installed between the base support 402 and the top water inlet pool 2. A drain pipe 404 is eccentrically installed at the bottom end of the base support 402. The rotation drive component 406 includes a bottom shaft 4061 coaxially mounted at the bottom end of the central cylinder 4057. The bottom shaft 4061 extends through to the bottom support 402. Fan blades 4062 are mounted at equal angles along the axial direction of the bottom shaft 4061, located below the drain pipe 404. Crossbars 4063 are symmetrically mounted on both sides of the rotating cylinder 4051, located inside the top water inlet 2. Plow rods 4064 are equidistantly mounted at the bottom ends of the crossbars 4063. The interior of 4061 is equipped with a height positioning component 408. The bottom support 402 is fixedly connected to the top water inlet pool 2, so that the water discharged into the settling tank 1 is fixed in position and located above the fan blade 4062. Under the impact of the water flow, a thrust is applied to the fan blade 4062, which pushes the rotating cylinder 4051 to rotate as a whole. This, in turn, drives the crossbar 4063 and the sled bar 4064 to move in the top water inlet pool 2, dislodging larger impurities in the top water inlet pool 2 and ensuring smooth filtration of the large-diameter filter holes 4055.

[0021] The filter control component 407 includes a baffle 4071 disposed inside the middle cylinder 4057. During fiber filtration, the baffle 4071 slowly moves downwards, causing the small-diameter filter holes 4058 to open continuously from top to bottom, preventing the small-diameter filter holes 4058 from becoming clogged from bottom to top and causing wastewater accumulation inside the middle cylinder 4057, thus facilitating wastewater discharge. A top plate 4072 is disposed above the baffle 4071, and a cone 4073 is disposed above the top plate 4072. A pull rod 4 is fixedly installed at the top of the cone 4073. 074, the top end of the pull rod 4074 extends through to the top of the rotating cylinder 4051, the inside of the stop block 4071 is provided with a movable groove 4077, the movable groove 4077 is movably installed with a movable plate 4078 inside, the top end of the movable plate 4078 is symmetrically installed with two guide rods 4079, the top end of the guide rods 4079 is fixedly connected to the top plate 4072, the bottom end of the movable plate 4078 is symmetrically installed with a support spring 40710, the bottom end of the support spring 40710 is fixedly connected to the inner bottom wall of the movable groove 4077, and a locking connector 409 is provided between the stop block 4071 and the cone block 4073; A bottom rod 4075 is fixedly installed at the bottom end of the stop block 4071. A longitudinal cavity 40711 is formed inside the bottom rod 4075, which is connected to a movable groove 4077. Transverse grooves 40712 are symmetrically formed on both sides of the bottom end of the longitudinal cavity 40711. A transverse positioning rod 40713 is movably installed inside the transverse groove 40712. A movable block 40714 is movably installed inside the longitudinal cavity 40711. Two connecting rods 40715 are symmetrically hinged to the bottom end of the movable block 40714. The bottom ends of the two connecting rods 40715 are respectively hinged to the two transverse positioning rods 40713. A double-sided toothed plate 40716 is fixedly installed at the top end of the movable block 40714. Single-sided toothed plates 407 are symmetrically arranged on both sides of the double-sided toothed plate 40716. 17. A single-sided toothed plate 40717 is fixedly installed at the bottom of the movable plate 4078. A gear 40718 meshes between the single-sided toothed plate 40717 and the double-sided toothed plate 40716. The gear 40718 is rotatably installed inside the longitudinal cavity 40711. After the small-diameter filter hole 4058 above the cone block 4073 is blocked, the drainage speed slows down. The water pressure above the cone block 4073 increases, pushing it to move downward. Then, through various transmission structures, the transverse positioning rod 40713 moves and disengages from the annular positioning groove 4082. After the stop block 4071 moves downward a certain distance, the transverse positioning rod 40713 moves outward to fix the position of the stop block 4071 again. This allows the small-diameter filter hole 4058 to open continuously from top to bottom according to the amount of fiber impurities in the wastewater.

[0022] The height positioning component 408 includes a rod groove 4081 opened inside the bottom shaft 4061, a bottom rod 4075 inserted into the rod groove 4081, and annular positioning grooves 4082 are equally spaced on the inner wall of the rod groove 4081, and a transverse positioning rod 40713 is inserted into the annular positioning groove 4082.

[0023] The locking connector 409 includes a limiting shaft 4091 coaxially mounted on the bottom end of the cone block 4073. A rotating plate 4092 is symmetrically mounted on the bottom end of the limiting shaft 4091. A locking block 4093 is mounted on the rotating plate 4092. A fixing plate 4094 is symmetrically mounted on the top end of the stop block 4071. A slot 4095 is provided on the fixing plate 4094. The pull rod 4074 pushes the cone block 4073 downward, causing the transverse positioning rod 40713 to disengage from the annular positioning groove 4082. Then, the pull rod 4074 rotates to cause the locking block 4093 to engage with the slot 4095. Then, the stop block 4071 is pulled upward to facilitate pushing the filtered fibers that adhere to the inner wall of the middle cylinder 4057 into the spacer 4056 for easy fiber collection and processing.

[0024] Working principle: In the original state, the top wall of the movable plate 4078 is in contact with the inner top wall of the movable groove 4077, and the support spring 40710 is in a compressed state, while the transverse positioning rod 40713 is inserted into the topmost annular positioning groove 4082. In the initial stage, pulp wastewater is introduced into the top inlet pool 2 through the inlet pipe 3. After the wastewater is filtered through the large-diameter filter holes 4055 on the circumference of the rotating cylinder 4051, the larger impurities remain in the inner cavity of the top inlet pool 2 outside the rotating cylinder 4051. The wastewater after the first filtration enters the middle cylinder 4057 and undergoes a second filtration through the small-diameter filter holes 4058 located above the cone block 4073 in the middle cylinder 4057 to filter the waste fibers in the wastewater. After the second filtration, the remaining wastewater enters the space below the partition plate 4056 and then enters the bottom tray 402. Finally, it is discharged downward from the drain pipe 404. The waste fiber impurities filtered out will adhere to the inner wall of the middle cylinder 4057. When wastewater is discharged downward from the drain pipe 404, it impacts the surface of the fan blade 4062, thereby applying a thrust to the fan blade 4062, which in turn drives the rotating cylinder 4051 to rotate as a whole. During the rotation, the crossbar 4063 and the shovel bar 4064 in the top water inlet pool 2 rotate synchronously, thereby removing larger impurities inside the top water inlet pool 2 and ensuring that the filtration of larger impurities in the wastewater is carried out normally. As the filtration volume of the small-diameter filter holes 4058 above the cone block 4073 increases, the amount of filtered impurities increases, causing the small-diameter filter holes 4058 to become clogged, thus slowing down the filtration speed. This, in turn, increases the pressure on the cone block 4073, causing it to move downwards. After the movable plate 4078 moves downwards, it pushes the single-sided toothed plate 40717 downwards. Then, under the transmission of the gear 40718, it drives the double-sided toothed plates 40716 downwards, causing the movable block 40714 to move upwards. After that, the two connecting rods 40715 pull the two transverse positioning rods 40713 towards the longitudinal cavity. 40711 moves internally and disengages from the annular positioning groove 4082. Then, the stop block 4071 moves downward under its own action. After moving downward a certain distance, the number of small-diameter filter holes 4058 that can be filtered increases, which speeds up the wastewater filtration. The water pressure at the top of the cone block 4073 decreases, and the cone block 4073 moves back under the elastic force of the support spring 40710. This then drives the transverse positioning rod 40713 to move outward again and engage with the annular positioning groove 4082 at the corresponding height, thus re-fixing the stop block 4071. The above operation is repeated continuously during the filtration process. After the wastewater is filtered twice, it enters the settling tank 1 for flocculation and settling, thus achieving the third separation of impurities. After wastewater treatment is completed, larger impurities inside the top inlet tank 2 are treated. Then, the cone block 4073 is pushed downwards to its limit position by the pull rod 4074, so that the locking block 4093 and the locking groove 4095 are at the same height, and the transverse positioning rod 40713 is disengaged from the annular positioning groove 4082. Then, the cone block 4073 is rotated by the pull rod 4074, so that the locking block 4093 engages with the locking groove 4095. Then, the pull rod 4074 is pulled upwards, which in turn pulls the stop block 4071 upwards. During the upward movement, The fibrous impurities adhering to the inner wall of the middle cylinder 4057 are pushed upward into the space above the partition 4056. Then, the top cover 4054 is opened, and the fibrous impurities in the rotating cylinder 4051 are processed. After processing, the stop block 4071 is pushed back, and the pull rod 4074 is rotated to unlock the locking block 4093 from the locking groove 4095. At this time, the cone block 4073 moves upward relative to the stop block 4071, and the transverse positioning rod 40713 is re-engaged with the uppermost annular positioning groove 4082, completing the reinstallation and facilitating subsequent use.

[0025] 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.

[0026] 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 pulp wastewater treatment device for a handmade paper production line, comprising a settling tank (1), characterized in that: The top of the settling tank (1) is equipped with a top water inlet tank (2), a water inlet pipe (3) is installed on one side of the top water inlet tank (2), and a wastewater filtration mechanism (4) is installed on the top water inlet tank (2). The wastewater filtration mechanism (4) includes a rotating trough (401) coaxially opened on the bottom wall of the top water inlet pool (2), and multiple filter elements (405) are provided on the inner side of the rotating trough (401). The multiple filter element (405) includes a rotating cylinder (4051) rotatably mounted inside the rotating groove (401). A rotating sealing ring is provided between the outer wall of the rotating cylinder (4051) and the inner wall of the rotating groove (401). Two limiting plates (4052) are installed in the circumferential direction of the rotating cylinder (4051). The limiting plates (4052) are used to limit the rotation of the rotating cylinder (4051). Large-diameter filter holes (4055) are evenly provided on the rotating cylinder (4051). The large-diameter filter holes (4055) are used to filter out large-volume impurities in pulp wastewater. A partition (4056) is fixedly installed inside the rotating cylinder (4051). The partition (4056) is flush with the bottom plate of the top water inlet pool (2). A middle cylinder (4057) is coaxially installed at the bottom end of the partition (4056). Small diameter filter holes (4058) are evenly opened in the circumference of the middle cylinder (4057). The small diameter filter holes (4058) are used to filter paper fibers in pulp wastewater. A rotation drive (406) is provided on the rotating cylinder (4051), and a filter control (407) is provided on the inner side of the middle cylinder (4057).

2. The pulp wastewater treatment device for a handmade paper production line according to claim 1, characterized in that: The bottom of the rotating cylinder (4051) is provided with a base support (402), and a fixing frame (403) is symmetrically installed between the base support (402) and the top water inlet pool (2). A drain pipe (404) is eccentrically installed at the bottom end of the base support (402).

3. The pulp wastewater treatment device for a handmade paper production line according to claim 1, characterized in that: The top of the rotating cylinder (4051) is symmetrically provided with impurity removal grooves (4053), and a top cover (4054) is bolted onto the impurity removal grooves (4053).

4. The pulp wastewater treatment device for a handmade paper production line according to claim 1, characterized in that: The rotating drive component (406) includes a bottom shaft (4061) coaxially mounted at the bottom end of the middle cylinder (4057). The bottom shaft (4061) extends through to the bottom support (402). Fan blades (4062) are installed at equal angles on the axial direction of the bottom shaft (4061). The fan blades (4062) are located below the drain pipe (404). Crossbars (4063) are symmetrically installed on both sides of the rotating cylinder (4051). The crossbars (4063) are located inside the top water inlet pool (2). Plow rods (4064) are installed at equal intervals at the bottom end of the crossbars (4063). A height positioning component (408) is provided inside the bottom shaft (4061).

5. The pulp wastewater treatment device for a handmade paper production line according to claim 1, characterized in that: The filter control component (407) includes a stop block (4071) disposed inside the middle cylinder (4057), a top plate (4072) disposed above the stop block (4071), a cone block (4073) disposed above the top plate (4072), a pull rod (4074) fixedly mounted on the top of the cone block (4073), the top of the pull rod (4074) extending through to the top of the rotating cylinder (4051), and a movable groove (4077) formed inside the stop block (4071). The movable plate (4078) is installed inside the movable plate (4078). Two guide rods (4079) are symmetrically installed on the top of the movable plate (4078). The top of the guide rods (4079) is fixedly connected to the top plate (4072). Support springs (40710) are symmetrically installed on the bottom of the movable plate (4078). The bottom of the support springs (40710) is fixedly connected to the inner bottom wall of the movable groove (4077). A locking connector (409) is provided between the stop block (4071) and the cone block (4073).

6. The pulp wastewater treatment device for a handmade paper production line according to claim 5, characterized in that: The bottom end of the stop block (4071) is fixedly installed with a bottom rod (4075). The bottom rod (4075) has a longitudinal cavity (40711) inside. The longitudinal cavity (40711) is connected to the movable groove (4077). The bottom end of the longitudinal cavity (40711) has symmetrical transverse grooves (40712) on both sides. The transverse positioning rod (40713) is movably installed inside the transverse groove (40712). The longitudinal cavity (40711) has a movable block (40714) movably installed inside. The bottom end of the movable block (40714) is symmetrically hinged with two connecting rods (40715). The bottom ends of the two connecting rods (40715) are respectively hinged to the two transverse positioning rods (40713).

7. The pulp wastewater treatment device for a handmade paper production line according to claim 6, characterized in that: The top of the movable block (40714) is fixedly installed with a double-sided toothed plate (40716), and a single-sided toothed plate (40717) is symmetrically arranged on both sides of the double-sided toothed plate (40716). The single-sided toothed plate (40717) is fixedly installed at the bottom of the movable plate (4078). A gear (40718) meshes between the single-sided toothed plate (40717) and the double-sided toothed plate (40716). The gear (40718) is rotatably installed inside the longitudinal cavity (40711).

8. The pulp wastewater treatment device for a handmade paper production line according to claim 4, characterized in that: The height positioning component (408) includes a rod groove (4081) opened inside the bottom shaft (4061), a bottom rod (4075) inserted into the rod groove (4081), and annular positioning grooves (4082) are equidistantly opened on the inner wall of the rod groove (4081), and a transverse positioning rod (40713) is inserted into the annular positioning groove (4082).

9. The pulp wastewater treatment device for a handmade paper production line according to claim 5, characterized in that: The locking connector (409) includes a limiting shaft (4091) coaxially mounted on the bottom end of the cone block (4073), a rotating plate (4092) symmetrically mounted on the bottom end of the limiting shaft (4091), a locking block (4093) mounted on the rotating plate (4092), and a fixing plate (4094) symmetrically mounted on the top end of the stop block (4071), with a locking groove (4095) provided on the fixing plate (4094).

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