A pulp treatment apparatus for containerboard
By introducing flow restrictors and blade structures into pulp processing equipment to regulate pulp flow rate, and combining filter membranes and scraper blades to improve filtration efficiency, the problems of uneven paper thickness and frequent filter material replacement have been solved, reducing energy costs and improving paper quality and filtration efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANYING INT HLDG CO LTD
- Filing Date
- 2022-04-18
- Publication Date
- 2026-08-04
AI Technical Summary
Existing equipment has a complex control structure for controlling the pulp flow rate in the sizing mechanism, a short service life, and is prone to failure, resulting in uneven paper thickness; the filter material needs to be replaced frequently, which is costly and has low fiber filtration efficiency; the water replenishment method in the pulp flushing tank affects the uniform distribution of fibers and increases energy costs.
The system employs components such as forming wire, sizing mechanism, rinsing tank, white water tank under the wire, post-filtration tank, and multi-disc filter. It regulates the pulp flow rate through flow restrictors and blade structure, improves filtration efficiency by using filter membranes and scraper blades, and rationally utilizes white water and clean water to reduce concentration, ensuring uniform pulp distribution.
It enables automatic adjustment of pulp flow rate, improves paper thickness uniformity, extends filter membrane life, reduces energy costs, and enhances fiber filtration efficiency and paper quality.
Smart Images
Figure CN114808518B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pulp processing technology, and more specifically to a pulp processing device for linerboard. Background Technology
[0002] Papermaking technology is specifically divided into two forms: machine-made and manual. Machine-made papermaking is carried out continuously on a papermaking machine. Pulp suitable for paper quality is diluted with water to a certain concentration, and then initially dewatered on the wire section of the papermaking machine to form a wet sheet. After pressing and dewatering, it is then dried into paper.
[0003] Patent document CN211848618U discloses a device for regulating the flow rate of the headbox in a paper machine, including a sizing mechanism. A first sizing channel is fixedly disposed on the lower end of the side wall of the sizing mechanism. An adjusting cylinder is connected to the end of the first sizing channel away from the sizing mechanism. A second sizing channel is connected to the end of the adjusting cylinder away from the first sizing channel. A hollow cylinder is fixedly disposed on the lower inner wall of the adjusting cylinder. The hollow cylinder is connected to the second sizing channel through a sizing outlet. A main flow outlet is disposed on the upper side wall of the hollow cylinder. A baffle plate matching the opening at the end of the first sizing channel is disposed inside the adjusting cylinder. A frustum-shaped adjusting plug is fixedly disposed on the lower side wall of the baffle plate. The frustum-shaped adjusting plug is matched with the main flow outlet. The beneficial effect of the above device is that it can realize automatic regulation of the pulp outflow speed of the sizing mechanism, ensuring that the outflow speed of the sizing mechanism is always kept within a constant and optimal range, thereby reducing the defect rate of paper forming.
[0004] Existing equipment has a complex control structure for controlling the pulp flow rate in the sizing mechanism. It cannot automatically adjust the pulp flow rate and has a short service life. It is prone to corrosion, which can cause the adjustment function to fail. The pulp in the sizing mechanism is not easy to maintain a uniform distribution, resulting in uneven thickness of the paper on the final forming wire. Existing equipment often requires multiple replacements of filter media during the water filtration process, which consumes a large number of ultrafiltration membranes, resulting in high costs. The filtration efficiency for fibers is low, and the performance is poor. Currently, the water source for the pulp flushing tank in papermaking is clean water and white water from the white water tank under the wire. If clean water is used to replenish the pulp flushing tank, it will increase the amount of clean water used and increase energy costs. If white water from the white water tank under the wire is used to replenish the tank, it will result in high concentration in the pulp flushing tank and on the wire, which is not conducive to the uniform distribution of fibers. Summary of the Invention
[0005] The purpose of this invention is to address the aforementioned problems and deficiencies by providing a pulp processing device for linerboard, thereby improving overall work efficiency.
[0006] The technical problem solved by this invention is:
[0007] (1) When controlling the pulp flow rate of the sizing mechanism, the existing equipment has a complex control structure, cannot automatically adjust the pulp flow rate, and has a short service life. It is easy for the adjustment function to fail due to corrosion, resulting in uneven thickness of the paper on the final forming wire.
[0008] (2) Existing equipment often requires multiple replacements of filter media during the water filtration process, which often consumes a large amount of ultrafiltration membranes, resulting in high costs, low filtration efficiency for fibers, and poor performance.
[0009] (3) Currently, the water sources for replenishing the pulping tank in papermaking are clean water and white water from the white water pool under the wire. If clean water is used to replenish the pulping tank, the amount of clean water used will increase, thus increasing energy costs. If white water from the white water pool under the wire is used to replenish the pulping tank, the concentration in the pulping tank will be high, and the concentration on the wire will be high, which is not conducive to the uniform distribution of fibers.
[0010] The objective of this invention can be achieved through the following technical solution: A pulp treatment device for linerboard includes a forming wire, a sizing mechanism on one side of the top of the forming wire, a rinsing tank on one side of the bottom of the forming wire, a white water tank under the wire on the other side of the bottom of the forming wire, a filtration tank on one side of the forming wire, a multi-disc filter on the other side of the forming wire, and a filter on one side of the multi-disc filter. The sizing mechanism includes a pulp cylinder, with several first blades and second blades arranged inside the pulp cylinder. Several equally spaced and uniformly distributed headstock branch pipes are connected through the bottom of the pulp cylinder. An output pipe is installed at one end of each headstock branch pipe. The headstock branch pipes and the output pipes are connected by a flow-limiting cylinder. The filter includes a filter box, and a filter membrane is installed inside the filter box.
[0011] As a further embodiment of the invention, a gearbox is installed at one end of the slurry cylinder, a drive motor is installed at one end of the gearbox, and a transmission rod and a transmission shaft sleeve are installed at the other end of the gearbox, with the transmission shaft sleeve movably sleeved on the transmission rod.
[0012] As a further aspect of the invention, the first blade is mounted on the outer periphery of the transmission rod, and the first blade is evenly distributed in a clockwise annular array. Several L-shaped transmission frames are fixedly connected to the outer periphery of the transmission shaft sleeve, and several second blades are fixedly connected to the L-shaped transmission frames, and the second blades are evenly distributed in a counterclockwise annular array.
[0013] As a further embodiment of the invention, a flow limiter is installed inside the flow limiting cylinder on the side near the output pipe, and a limit block is installed inside the flow limiting cylinder on the side near the flow limiter.
[0014] As a further aspect of the invention, the end face of the current limiter near the limiting block is inclined and adapted to the limiting block. Several limiting slide rods evenly distributed at equal angles are fixedly connected to the end face of the current limiter near the limiting block. The ends of the limiting slide rods penetrate the bottom edge of the frustum of the limiting block and are slidably connected to the limiting block.
[0015] As a further aspect of the invention, a first magnetic block is embedded in the limiting block, and several second magnetic blocks are embedded in the current limiter in a uniformly distributed manner at equal angles, with the first magnetic block and the second magnetic block repelling each other.
[0016] As a further embodiment of the invention, screw slides are installed on both sides of the filter box, and sealing doors are installed on the other two sides of the filter box. The filter membrane is in the shape of an inverted triangle, and a power roller is provided at each corner of the inner side of the filter membrane.
[0017] As a further embodiment of the invention, a filter box is installed on the top inner side of the filter box, a transfer box for receiving the filtrate is provided on the upper inner side of the filter membrane, a cleaning pipe is installed in the middle inner side of the filter box, a sprayer is installed at the end of the cleaning pipe, and several scraping blades are provided on both sides of the filter membrane in an equidistant and uniformly distributed manner.
[0018] As a further embodiment of the invention, the bottom of the filter box is provided with a filter chamber, the top of the filter chamber is provided with a support partition, and a water filter screen is installed between the support partition and the sealing door.
[0019] As a further embodiment of the invention, a support strip is slidably connected to the upper surface of the support partition, and a water-pressing inclined plate is provided on both sides of the support strip. The middle of both sides of the water-pressing inclined plate is fixedly connected to the support strip through a support column. The water-pressing inclined plate is rotatably connected to the support column through a torsion spring bearing, and the upper end of the water-pressing inclined plate abuts against the support strip.
[0020] The beneficial effects of this invention are:
[0021] (1) By adjusting the rotation of the bolt, the drive ring moves, pushing the connecting rod to move, thereby adjusting the position of the limiting ring on the limiting slide rod, thus adjusting the maximum flow rate allowed by the flow limiter. When the pulp enters the output pipe through the pulp branch pipe and is finally sprayed onto the forming wire, the pressure of the pulp is adjusted by the limiting block. When the pulp pressure is too high, the limiting block is forced to move towards the flow limiter, reducing the gap between the limiting block and the flow limiter, thereby controlling the pulp flow rate within a suitable range, avoiding defects in the final coating and forming due to excessive pressure, and preventing uneven coating. When the pulp is conveyed into the pulp cylinder, the coaxial transmission gear set structure in the gearbox is driven by the drive motor, which makes the transmission shaft sleeve and the transmission rod rotate in opposite directions. This causes the transmission rod and the L-shaped transmission frame to rotate in opposite directions, so that when each first blade rotates clockwise, each second blade rotates counterclockwise. This creates a continuous convection state of the pulp in the pulp cylinder from the center to the outer periphery, keeping the pulp in the pulp cylinder evenly dispersed and not agglomerated. This avoids uneven distribution of pulp on the forming wire, which would cause poor paper forming, thereby improving the uniformity of paper thickness on the forming wire and improving product quality.
[0022] (2) When filtering the filtrate, the filtrate is evenly sprayed onto the upper surface of the filter membrane through the filter box. The water is quickly filtered out through the filter membrane and transported to the post-filtration tank through the transfer box. The fiber residue filtered out by the filter membrane adheres to the filter membrane and moves clockwise under the drive of the power roller. The fiber residue is removed by the scraper. At the same time, the inner side of the filter membrane is sprayed by the sprayer and the high-pressure nozzle, so that the water flow pushes the fiber residue attached to the filter membrane to the outside, which facilitates the scraper to remove and clean it, thereby improving the transfer efficiency of the fiber residue and extending the use effect and service life of the filter membrane. The connecting vertical rod is driven by the screw slide table, the supporting bar is pushed by the connecting vertical rod, and the water pressing plate is pushed by the supporting bar. The water pressing plate presses water on the fiber residue. The water enters the filter chamber through the filter screen and is transferred to the post-filtration tank, thereby further improving the water use efficiency. Then the sealing door is opened to discharge the fiber residue block from the filter box, which facilitates the centralized treatment of the limited residue and improves the treatment efficiency.
[0023] (3) The concentrated pulp is diluted with white water in the pulping tank. The treated pulp is then sent to the sizing mechanism, where it is stirred by the pulping cylinder, the first blade, and the second blade to maintain uniformity. This allows the pulp to be evenly sprayed onto the forming wire, where it is dewatered and formed. The front end of the forming wire undergoes gravity dewatering, and the resulting water is discharged into the pulping tank as part of the white water. The middle and rear parts of the forming wire perform vacuum dewatering, and the water from these parts is discharged into the white water tank below the wire. The water is sent to a multi-disc filter for graded filtration to obtain a clear filtrate. The clear filtrate from the multi-disc filter is then discharged into a filter for further filtration to remove the fibers. The resulting filtered water is discharged into a post-filtration tank for centralized storage. The filtered water stored in the post-filtration tank is then pumped to a pulp flushing tank to reduce the concentration of white water in the pulp flushing tank. This reduces the concentration of the resulting pulp in the pulp flushing tank, ensuring that the pulp concentration on the forming wire is effectively controlled and reduced according to actual needs, thereby improving the stable quality of the final paper product. Attached Figure Description
[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0025] Figure 1 This is a front view of the overall structure of the present invention;
[0026] Figure 2 This is a schematic diagram of the internal structure of the slurry branch pipe of the present invention;
[0027] Figure 3 for Figure 2 Enlarged view of region A in the middle;
[0028] Figure 4 This is a schematic diagram of the internal structure of the slurry container of the present invention;
[0029] Figure 5 This is a perspective view of the filter of the present invention;
[0030] Figure 6 This is a schematic diagram of the internal structure of the filter box of the present invention;
[0031] Figure 7 This is a schematic diagram of the overall structure of the water-pressing inclined plate of the present invention;
[0032] Figure 8 for Figure 6 A schematic diagram of the internal structure of region B;
[0033] In the diagram: 1. Forming mesh; 2. Sizing mechanism; 3. White water tank under the mesh; 4. Sizing tank; 5. Multi-disc filter; 6. Filter; 7. Post-filter tank; 8. Sizing cylinder; 9. Support; 10. Transmission rod; 11. First blade; 12. L-shaped transmission frame; 13. Second blade; 14. Sizing branch pipe; 15. Limiting block; 16. Flow limiting cylinder; 17. Flow limiter; 18. First magnetic block; 19. Second magnetic block; 20. Adjusting bolt; 21. Sealed bearing; 22. Limiting slide rod; 23. Limiting ring; 24. Connecting rod; 25. Transmission groove; 26. Transmission ring; 27. Filter box; 28. Screw slide; 29. Sealing door; 30. Transmission shaft sleeve; 31. Filter box; 32. Power roller; 33. Filter membrane; 34. Scraper; 35. Transfer box; 36. Cleaning pipe; 37. Sprayer; 38. Connecting vertical rod; 39. Support partition; 40. Filter chamber; 41. Water pressure inclined plate; 42. Support bar; 43. Filter screen; 44. Torsion spring bearing; 45. Support column; 46. Spring rod; 47. Gearbox; 48. Drive motor. Detailed Implementation
[0034] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0035] Please see Figure 1-8 As shown: A pulp treatment device for linerboard includes a forming wire 1, a sizing mechanism 2 is provided on one side of the top of the forming wire 1, a sizing tank 4 is provided on one side of the bottom of the forming wire 1, a white water tank 3 is provided on the other side of the bottom of the forming wire 1, a filtration tank 7 is provided on one side of the forming wire 1, a multi-disc filter 5 is provided on the other side of the forming wire 1, and a filter 6 is provided on one side of the multi-disc filter 5. The sizing mechanism 2 includes a pulp cylinder 8, and a plurality of first blades 11 and second blades 13 are provided inside the pulp cylinder 8. A plurality of equally spaced and uniformly distributed headstock branch pipes 14 are connected through the bottom of the pulp cylinder 8. An output pipe is installed at one end of the headstock branch pipe 14. The headstock branch pipe 14 and the output pipe are connected by a flow limiting cylinder 16. The filter 6 includes a filter box 27, and a filter membrane 33 is installed inside the filter box 27.
[0036] In use, the concentrated pulp is diluted with white water in the pulping tank 4, and the treated pulp is sent to the pulping mechanism 2. The pulp is stirred by the pulp cylinder 8, the first blade 11, and the second blade 13 to keep it uniform, thereby spraying the pulp evenly onto the forming wire 1. The pulp is dewatered and formed on the forming wire 1. The front end of the forming wire 1 is gravity dewatered. After gravity dewatering of the pulp by the forming wire 1, the resulting water is discharged into the pulping tank 4 as part of the white water. The middle and rear parts of the forming wire 1 are vacuum dewatered. The water obtained from the middle and rear parts of the forming wire 1 is discharged into the white water tank 3 under the wire. 3. The solution is sent to a multi-disc filter 5 for graded filtration to obtain a clear filtrate. The clear filtrate obtained from the multi-disc filter 5 is then discharged into a filter 6 for further filtration to remove the fibers. The resulting filtered water is discharged into a post-filtration tank 7 for centralized storage. The filtered water stored in the post-filtration tank 7 is then pumped to a pulping tank 4 to reduce the white water concentration in the pulping tank 4, thereby reducing the concentration of the resulting pulp. Specifically, the concentration of the filtrate is less than 0.01%, the white water concentration in the pulping tank is less than 0.4%, the thick pulp concentration is greater than 3%, and the pulp concentration is less than 1%.
[0037] A gearbox 47 is installed at one end of the slurry cylinder 8. The gearbox 47 contains a conventional coaxial transmission gear set structure. A drive motor 48 is installed at the power input end of the gearbox 47 to provide power. A transmission rod 10 and a transmission shaft sleeve 30 are installed at the output end of the gearbox 47. The transmission shaft sleeve 30 is movably sleeved on one end of the transmission rod 10. The coaxial transmission gear set structure includes a first bevel gear plate, a second bevel gear plate, and a third bevel gear plate. The first bevel gear plate is rotatably connected to the end of the gearbox 47 near the slurry cylinder 8. The third bevel gear plate is rotatably connected to the end of the gearbox 47 near the drive motor 48. The second bevel gear plate is rotatably connected to the inner wall of the gearbox 47. The two sides of the second bevel gear plate are respectively connected to the first bevel gear plate and the third bevel gear plate. The gearbox uses a gear meshing transmission. The transmission shaft sleeve 30 passes through the end side of the gearbox 47 and is rotatably connected to the gearbox 47. The transmission shaft sleeve 30 is fixedly connected to the first bevel gear. The transmission rod 10 passes through the shaft of the first bevel gear and maintains a gap with the first bevel gear. The end of the transmission rod 10 is fixedly connected to one side of the third bevel gear. The end of the drive shaft of the drive motor 48 passes through the gearbox 47 and is fixedly connected to the other side of the third bevel gear. In use, the drive motor 48 drives the third bevel gear and the transmission rod 10 to rotate. The third bevel gear drives the second bevel gear and the first bevel gear in sequence, thereby driving the transmission shaft sleeve 30 to rotate and causing the transmission shaft sleeve 30 and the transmission rod 10 to rotate in opposite directions on the same axis.
[0038] The first blade 11 is installed on the outer peripheral side of the transmission rod 10, and the first blade 11 is evenly distributed in a clockwise circular array. The other end of the transmission rod 10 is rotatably connected to the slurry cylinder 8 through the bracket 9 and is coaxial with the slurry cylinder 8. Several L-shaped transmission frames 12 are fixedly connected to the outer periphery of the transmission shaft sleeve 30 and are evenly distributed at equal angles. The side of the L-shaped transmission frame 12 is slidably connected to the inner side wall of the slurry cylinder 8. The second blade 13 is evenly distributed in a counterclockwise circular array, and the second blade 13 is fixedly connected to the side of the L-shaped transmission frame 12 close to the transmission rod 10.
[0039] When the pulp is conveyed into the pulp cylinder 8, the coaxial transmission gear set structure in the gearbox 47 is driven by the drive motor 48, which makes the transmission shaft sleeve 30 and the transmission rod 10 rotate in opposite directions. This causes the transmission rod 10 and the L-shaped transmission frame 12 to rotate in opposite directions, so that when each first blade 11 rotates clockwise, each second blade 13 rotates counterclockwise. This creates a continuous convection state of the pulp in the pulp cylinder 8 from the center to the outer periphery, keeping the pulp in the pulp cylinder 8 evenly dispersed and not agglomerated. This avoids uneven distribution of pulp on the forming wire 1, which would cause poor paper forming, thereby improving the uniformity of paper thickness on the forming wire 1 and improving product quality.
[0040] A flow limiter 17 is installed inside the flow limiting cylinder 16 near the output pipe. The outer periphery of the flow limiter 17 is fixed and sealed to the inner wall of the flow limiting cylinder 16. A limiting block 15 is installed inside the flow limiting cylinder 16 near the flow limiter 17. The limiting block 15 is frustum-shaped, and the end of the frustum of the limiting block 15 points towards the flow limiter 17. The end face of the flow limiter 17 near the limiting block 15 is inclined and adapted to the limiting block 15. Several limiting slide rods 22, evenly distributed at equal angles, are fixedly connected to the end face of the flow limiter 17 near the limiting block 15. The limiting slide rods 22 are parallel to the axis of the flow limiting cylinder 16. The end of the limiting slide rod 22 passes through the bottom edge of the frustum of the limiting block 15 and is slidably connected to the limiting block 15. A first magnetic block 18 is embedded in the limiting block 15. A first magnetic block 18 is embedded in the flow limiter 17. Several second magnetic blocks 19 are evenly distributed at equal angles, and the first magnetic block 18 and the second magnetic block 19 repel each other. Two symmetrically arranged adjusting bolts 20 are embedded inside the end of the flow limiting cylinder 16 near the slurry branch pipe 14. The adjusting bolts 20 are rotatably connected to the flow limiting cylinder 16 through the sealing bearing 21, and the adjusting bolts 20 are sealed to the flow limiting cylinder 16 through the sealing bearing 21. A transmission groove 25 is opened at the end of the adjusting bolt 20 inside the flow limiting cylinder 16. The end of the adjusting bolt 20 is threaded, and a transmission ring 26 is threadedly sleeved at the end of the adjusting bolt 20. The end of the limiting slide rod 22 is slidably connected to the limiting ring 23. The limiting ring 23 and the transmission ring 26 are connected through the connecting rod 24. A sliding groove that is slidably connected to the connecting rod 24 is opened on the inner side wall of the flow limiting cylinder 16 near the transmission groove 25.
[0041] In use, rotating the adjusting bolt 20 drives the transmission ring 26 to move, which in turn moves the connecting rod 24, thereby adjusting the position of the limiting ring 23 on the limiting slide rod 22. This adjusts the maximum flow rate allowed by the flow restrictor 17. When the pulp enters the output pipe through the pulp branch pipe 14 and is finally sprayed onto the forming screen 1, the pressure of the pulp is adjusted by the limiting block 15. When the pressure of the pulp is too high, the limiting block 15 is forced to move towards the flow restrictor 17, reducing the gap between the limiting block 15 and the flow restrictor 17. This controls the pulp flow rate within a suitable range, preventing defects in the final coating and preventing uneven coating due to excessive pressure.
[0042] Both sides of the filter box 27 are equipped with screw slides 28, and the other two sides of the filter box 27 are equipped with sealing doors 29. Synchronous cylinders for opening and closing the sealing doors 29 are installed on both sides of the upper end of the sealing doors 29. The filter membrane 33 is inverted triangular in shape, and power rollers 32 are installed at each corner of the inner side of the filter membrane 33. A filter box 31 is installed on the top inner side of the filter box 27. The filter box 31 is connected to the multi-disc filter 5 through a connecting pipe. A transfer box 35 for receiving the filtrate is installed on the upper inner side of the filter membrane 33. The transfer box 35 is connected to the filtrate... Pool 7 is connected. A cleaning pipe 36 is installed in the middle of the inner side of the filter box 31. A sprayer 37 is installed at the end of the cleaning pipe 36. The sprayer 37 is located inside the filter membrane 33 and is parallel to the side of the filter membrane 33. Several high-pressure nozzles are arranged in an array evenly distributed on the inner surface of the sprayer 37 near the filter membrane 33. Several scraping blades 34 are arranged at equal intervals evenly distributed on both sides of the filter membrane 33. The side of the scraping blade 34 is arc-shaped, and one end of the scraping blade 34 abuts against the side of the filter membrane 33.
[0043] When the filtrate is filtered through filter 6, the filtrate is evenly sprayed onto the upper surface of filter membrane 33 through filter box 31. The water is quickly filtered out through filter membrane 33 and transported to post-filtration tank 7 through transfer box 35. The fiber residue filtered out by filter membrane 33 adheres to filter membrane 33 and moves clockwise under the drive of power roller 32. The fiber residue is removed by scraper blade 34. At the same time, sprayer 37 and high-pressure nozzle spray the inside of filter membrane 33, so that the water flow pushes the fiber residue attached to filter membrane 33 to the outside, so as to facilitate scraping and cleaning by scraper blade 34, thereby improving the transfer efficiency of fiber residue and extending the service life of filter membrane 33.
[0044] The bottom of the filter box 27 is provided with a filter chamber 40, which is connected to the filter tank 7. The top of the filter chamber 40 is provided with a support partition 39. There is a gap between the support partition 39 and the filter box 27 on both sides near the sealing door 29. A filter screen plate 43 is installed between the support partition 39 and the sealing door 29. A support bar 42 is slidably connected to the upper surface of the support partition 39. The support bar 42 is connected to the sliding block of the screw slide table 28 through the connecting vertical rod 38. There are filter screen plates 43 on both sides of the support bar 42. A water-pressing inclined plate 41 is provided. The middle of both sides of the water-pressing inclined plate 41 is fixedly connected to the support bar 42 through the support column 45. The water-pressing inclined plate 41 is rotatably connected to the support column 45 through the torsion spring bearing 44. The upper end of the water-pressing inclined plate 41 abuts against the support bar 42, and the lower end of the water-pressing inclined plate 41 abuts against the upper surface of the support partition 39. The lower end of the water-pressing inclined plate 41 is connected to the lower side of the support bar 42 through the spring rod 46. The spring rod 46 is rotatably connected to the water-pressing inclined plate 41 and the support bar 42 respectively.
[0045] In use, the connecting vertical rod 38 is driven by the screw slide 28, which in turn pushes the support bar 42. The support bar 42 then pushes the water-pressing inclined plate 41, which presses water onto the fiber residue. The water passes through the filter screen 43 into the filter chamber 40 and is then transferred to the post-filtration tank 7, thereby further improving water utilization efficiency. Subsequently, the sealing door 29 is opened to discharge the fiber residue blocks from the filter box 27, facilitating centralized processing of the limited residue and improving processing efficiency.
[0046] The bottom of the water-pressing inclined plate 41 is provided with several guide grooves. The depth of the guide grooves is half the thickness of the water-pressing inclined plate 41. The guide grooves assist the water-pressing inclined plate 41 in guiding the water in the fiber residue, thereby achieving the best water extraction efficiency.
[0047] In use, the concentrated pulp is diluted with white water in the pulping tank 4. The treated pulp is then sent to the pulping mechanism 2, where it is stirred by the pulp cylinder 8, the first blade 11, and the second blade 13 to maintain uniformity. The pulp is then evenly sprayed onto the forming wire 1, where it is dewatered and formed. The front end of the forming wire 1 undergoes gravity dewatering, and the resulting water is discharged into the pulping tank 4 as part of the white water. The middle and rear parts of the forming wire 1 undergo vacuum dewatering. The water obtained from the middle and rear parts of 1 is discharged into the white water tank 3 under the wire mesh. The white water tank 3 is then sent to the multi-disc filter 5 for graded filtration to obtain clear filtrate. The clear filtrate obtained from the multi-disc filter 5 is then discharged into the filter 6 for further filtration to filter out the fibers. The resulting filtered water is discharged into the filter tank 7 for centralized storage. The filtered water stored in the filter tank 7 is then pumped to the pulp flushing tank 4 to reduce the white water concentration in the pulp flushing tank 4, thereby reducing the concentration of the obtained pulp in the pulp flushing tank 4.
[0048] When the pulp is conveyed into the pulp cylinder 8, the coaxial transmission gear set structure in the gearbox 47 is driven by the drive motor 48, causing the transmission shaft sleeve 30 and the transmission rod 10 to rotate coaxially in opposite directions. This, in turn, causes the transmission rod 10 and the L-shaped transmission frame 12 to rotate coaxially in opposite directions. As each first blade 11 rotates clockwise, each second blade 13 rotates counterclockwise, creating a continuous convection flow of the pulp in the pulp cylinder 8 from the center outwards. This ensures that the pulp in the pulp cylinder 8 is evenly dispersed and does not clump, preventing uneven distribution of pulp on the forming wire 1 and resulting in poor paper forming. By rotating the adjusting bolt 20, the transmission ring 26 is moved, pushing the connecting... The rod 24 moves, thereby adjusting the position of the limiting ring 23 on the limiting slide rod 22, thereby adjusting the maximum flow rate allowed by the flow limiter 17. When the pulp enters the output pipe through the pulp branch pipe 14 and is finally sprayed onto the forming wire 1, the pressure of the pulp is adjusted by the limiting block 15. When the pressure of the pulp is too high, the limiting block 15 is forced to move towards the flow limiter 17, reducing the gap between the limiting block 15 and the flow limiter 17, thereby controlling the pulp flow rate within a suitable range, avoiding defects in the final coating due to excessive pressure, preventing uneven coating, thereby improving the uniformity of paper thickness on the forming wire 1 and improving product quality.
[0049] When the filtrate is filtered through filter 6, the filtrate is evenly sprayed onto the upper surface of filter membrane 33 through filter box 31. The water is quickly filtered out through filter membrane 33 and transported to post-filtration tank 7 through transfer box 35. The fiber residue filtered out by filter membrane 33 adheres to filter membrane 33 and moves clockwise under the drive of power roller 32. The fiber residue is removed by scraper blade 34. At the same time, sprayer 37 and high-pressure nozzle spray the inside of filter membrane 33, so that the water flow pushes the fiber residue attached to filter membrane 33 to the outside, thus facilitating the scraper blade. 34. Scraping and cleaning improves the transfer efficiency of fiber residue and extends the service life and working life of filter membrane 33. The connecting vertical rod 38 is driven by the screw slide 28, which in turn pushes the support bar 42. The support bar 42 pushes the water-pressing inclined plate 41, which presses water onto the fiber residue. The water passes through the filter screen 43 into the filter chamber 40 and is transferred to the post-filtration tank 7, thereby further improving the efficiency of water use. Then, the sealing door 29 is opened to discharge the fiber residue block from the filter box 27, which facilitates centralized treatment of the limited residue and improves the treatment efficiency.
[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A pulp treatment apparatus for boxboard paper, characterized by The system includes a forming net (1), a sizing mechanism (2) on one side of the top of the forming net (1), a sizing tank (4) on one side of the bottom of the forming net (1), a white water tank (3) on the other side of the bottom of the forming net (1), a filtration tank (7) on one side of the forming net (1), a multi-disc filter (5) on the other side of the forming net (1), and a filter (6) on one side of the multi-disc filter (5). The sizing mechanism (2) includes a sizing cylinder (8), which has several first blades (11) and second blades (13) inside. The bottom of the sizing cylinder (8) is connected to several equidistant and uniformly distributed sizing branch pipes (14). One end of the sizing branch pipe (14) is equipped with an output pipe. The sizing branch pipe (14) and the output pipe are connected by a flow limiting cylinder (16). The filter (6) includes a filter box (27), which has a filter membrane (33) installed inside. A flow limiter (17) is installed inside the flow limiting cylinder (16) on the side near the output pipe, and a limit block (15) is installed inside the flow limiting cylinder (16) on the side near the flow limiter (17). The end face of the current limiter (17) near the limiting block (15) is inclined and adapted to the limiting block (15). Several limiting slide rods (22) are fixedly connected to the end face of the current limiter (17) near the limiting block (15) and are evenly distributed at equal angles. The end of the limiting slide rod (22) passes through the bottom edge of the frustum of the limiting block (15) and is slidably connected to the limiting block (15). The limiting block (15) is embedded with a first magnetic block (18), and the current limiter (17) is embedded with several second magnetic blocks (19) evenly distributed at equal angles, and the first magnetic block (18) and the second magnetic block (19) repel each other; The bottom of the filter box (27) is provided with a filter chamber (40), the top of the filter chamber (40) is provided with a support partition (39), both sides of the filter box (27) are equipped with screw slides (28), the other two sides of the filter box (27) are equipped with sealing doors (29), and a water filter screen (43) is installed between the support partition (39) and the sealing doors (29). The upper surface of the support partition (39) is slidably connected to a support strip (42). A water-pressing inclined plate (41) is provided on both sides of the support strip (42). The middle of both sides of the water-pressing inclined plate (41) is fixedly connected to the support strip (42) through a support column (45). The water-pressing inclined plate (41) is rotatably connected to the support column (45) through a torsion spring bearing (44). The upper end of the water-pressing inclined plate (41) abuts against the support strip (42).
2. A pulp treatment apparatus for use in the manufacture of containerboard as claimed in claim 1, characterized in that A gearbox (47) is installed at one end of the slurry cylinder (8), a drive motor (48) is installed at one end of the gearbox (47), and a transmission rod (10) and a transmission shaft sleeve (30) are installed at the other end of the gearbox (47). The transmission shaft sleeve (30) is movably sleeved on the transmission rod (10).
3. A pulp treatment apparatus for use in the manufacture of containerboard according to claim 2, characterised in that The first blade (11) is installed on the outer circumferential side of the transmission rod (10), and the first blade (11) is evenly distributed in a clockwise circular array. The outer circumference of the transmission shaft sleeve (30) is fixedly connected with several L-shaped transmission frames (12) evenly distributed at equal angles. Several second blades (13) are fixedly connected on the L-shaped transmission frames (12), and the second blades (13) are evenly distributed in a counterclockwise circular array.
4. A pulp treatment apparatus for use in the manufacture of containerboard as defined in claim 1, characterized in that The filter membrane (33) is in the shape of an inverted triangle, and a power roller (32) is provided at each of the inner corners of the filter membrane (33).
5. A pulp treatment apparatus for use in the manufacture of containerboard as defined in claim 1, characterized in that A filter box (31) is installed on the top inner side of the filter box (27). A transfer box (35) for receiving the filtrate is provided on the upper inner side of the filter membrane (33). A cleaning pipe (36) is installed in the middle inner side of the filter box (27). A sprayer (37) is installed at the end of the cleaning pipe (36). Several scraping blades (34) are provided on both sides of the filter membrane (33) in an equidistant and uniformly distributed manner.