Paper pulp dewatering and drying system
By combining a plane filter press, a pulp shearing machine, and a stacker, the problems of high energy consumption and severe fiber loss in pulp dewatering and drying were solved, enabling low-cost production of high-dryness pulp and improving paper quality and transportation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI LIYUANBAO SCI & TECH
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-23
AI Technical Summary
Existing pulp dewatering and drying processes suffer from high energy consumption, high costs, and significant pulp fiber loss, leading to waste in transportation costs and a decline in paper quality.
The pulp dewatering and drying system, consisting of a plane filter press, a pulp shearing machine, and a pulp stacker, improves pulp dryness and reduces fiber loss through high-pressure filtration and thermal drying technologies.
It enables the production of high-dryness pulp with lower energy consumption and cost, reduces transportation costs, improves paper quality and value, and supports energy conservation and carbon reduction goals.
Smart Images
Figure CN224395317U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of pulp dewatering and drying technology, and in particular relates to a pulp dewatering and drying system. Background Technology
[0002] Pulp dewatering and drying is an important process in the production of pulp and paper enterprises, and it is also a key process with very high energy and cost consumption. At the same time, the dewatering and drying process adopted for pulp is not only related to the cost, but also to the strength, folding endurance and other product performance and quality of the paper products produced by dewatering and drying.
[0003] The pulp produced using bamboo, wood, or waste paper as raw materials is generally referred to as "water pulp" in the industry. Its dryness is often only about 3%. If it is directly transported to downstream paper product companies for paper product production, the transportation cost of the pulp is too high. Therefore, in order to reduce the transportation cost of pulp, pulp companies that ship it out of the factory often need to dehydrate and dry it as much as possible to increase the dryness of the pulp.
[0004] Considering factors such as transportation distance, required pulp storage time, and dewatering and drying costs, pulp and paper companies generally use relatively low-cost dewatering and drying processes such as screw dewaterers or belt filter presses when the transportation distance is short and the pulp storage period requirement is not long. However, the aforementioned "watery pulp" can often only be dewatered and dried to a dryness of 30% to 40%. When the transportation distance is long and the pulp storage period requirement is relatively long, pulp and paper companies generally use belt dewatering + high-temperature steam drying process to dewater and dry the pulp to a dryness of over 80%.
[0005] As the international community becomes increasingly urgent in its demands for energy conservation, emission reduction, green and low-carbon transformation and upgrading in economic development, the aforementioned pulp dewatering and drying technology can no longer meet the requirements of the current situation and the cost and quality requirements of market competition.
[0006] According to the currently used pulp dewatering and drying processes in the industry, the higher the dryness of the pulp after dewatering and drying, the greater the reduction in folding endurance. Using mechanical dewatering and drying processes such as spiral or belt dewatering, the pulp dryness can only reach 30% to 40%, which is about 20% to 30% less than that of "water pulp". However, direct transportation still results in a significant waste of transportation costs (the majority of which is water). Although belt dewatering combined with high-temperature steam drying can increase the pulp dryness to over 80%, the energy consumption cost is very high. Moreover, after high-temperature drying and the repeated bending and relative friction of the pulp board with the conveyor rollers during the drying process, the pulp fibers become brittle and easily break, resulting in a significant loss of pulp fiber length. This also greatly reduces the folding endurance of the paper used in papermaking, by about 50% to 60% compared to "water pulp". Transportation costs are greatly reduced, but this seriously affects the quality and value of the pulp.
[0007] China's annual pulp production alone is close to 90 million tons. If the dewatering and drying technology of pulp can be innovated and upgraded, and the dryness of pulp dewatering and drying can be significantly improved with lower energy consumption and cost while reducing folding endurance by less or the same amount, it will create huge space for cost reduction and quality improvement in the pulp and paper industry. It can also make a great contribution to energy conservation and carbon reduction, green and low-carbon transformation of the social economy, and better realization of the "dual carbon" goal. Utility Model Content
[0008] The purpose of this invention is to provide a pulp dewatering and drying system. The technical problem to be solved is to improve the dryness, quality and value of pulp after dewatering and drying with lower cost and less loss of folding endurance.
[0009] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. A pulp dewatering and drying system according to this utility model includes a plane filter press, a pulp board shearing machine, and a pulp board stacking machine; the front end of the pulp board shearing machine is connected and installed at the rear end of the plane filter press, and the front end of the pulp board stacking machine is connected and installed at the rear end of the pulp board shearing machine.
[0010] As an optional embodiment of this utility model, the aforementioned planar filter press in the pulp dewatering and drying system includes a filter press frame, a filter press cloth device, a filter cloth, a filter cloth traction device, a filter press plate, and a filter press hydraulic device. From the front end to the rear end of the planar filter press, the filter press cloth device, the filter press hydraulic device, and the filter cloth traction device are installed sequentially on the filter press frame. The filter press plate is installed on the filter press hydraulic device. The filter cloth is wound around and movably connected to the filter press cloth device, with one end movably connected to the filter cloth traction device above the filter press hydraulic device and the other end movably connected to the filter cloth traction device via the filter press plate.
[0011] The slurry plate shearing machine includes a shearing frame, a fixed shearing blade, a moving shearing blade, and a shearing drive device arranged sequentially from bottom to top. The fixed shearing blade and the shearing drive device are respectively mounted on the shearing frame from bottom to top. The moving shearing blade is connected to the shearing drive device mounted above the fixed shearing blade. The cutting edges of the fixed shearing blade and the moving shearing blade are opposite to each other.
[0012] The slab stacking machine includes a stacking frame, a stacking lifting device, a slab conveying device, and a slab shaping device. The stacking lifting device is connected and installed on the stacking frame, the slab conveying device is connected and installed on the stacking lifting device, and the slab shaping device is connected and installed on the side of the slab conveying device.
[0013] As an optional embodiment of this utility model, the pressure filter hydraulic device in the aforementioned pulp dewatering and drying system is adapted to be a set or multiple sets in series through the filter cloth;
[0014] The filter cloth pressing device and the filter cloth traction device are one set and are adapted to one or more sets of the filter plates, or they are multiple sets connected in parallel and adapted to multiple sets of the filter plates respectively.
[0015] As an optional embodiment of this utility model, the aforementioned pulp dewatering and drying system further includes a gravity dewatering machine; the gravity dewatering machine is connected and installed at the front end of the plane filter press.
[0016] As an optional embodiment of this utility model, the aforementioned pulp dewatering and drying system further includes a thermal drying box; the thermal drying box is connected and installed at the front end of the pulp shearing machine or the rear end of the pulp shearing machine and connected to the front end of the pulp stacking machine.
[0017] As an optional embodiment of this utility model, the gravity dewatering machine in the aforementioned pulp dewatering and drying system is a belt dewatering machine or a screw dewatering machine.
[0018] As an optional embodiment of this utility model, the aforementioned pulp dewatering and drying system is provided with a single-layer or multi-layer drying chain conveyor inside the thermal drying box.
[0019] The hot drying box is heated by a heat pump or by high-temperature steam.
[0020] As an optional embodiment of this utility model, the aforementioned pulp dewatering and drying system further includes a board stacking machine; the board stacking machine is connected and installed at the rear end of the pulp board stacking machine.
[0021] This invention has significant advantages and beneficial effects compared with the prior art. Through the above technical solution, the pulp dewatering and drying system of this invention has at least one of the following advantages and beneficial effects:
[0022] Firstly, by using planar pressure filtration for dewatering, the dryness of the pulp can directly reach 50% to 75%. On this basis, thermal drying can be added to increase the dryness of the pulp to over 80%, and the energy consumption cost of pulp dewatering and drying can be reduced by more than 50%.
[0023] Secondly, through planar pressure filtration dewatering, the dryness of the pulp can directly reach 50% to 75%, which is 20% to 35% higher than the spiral and belt dewatering processes currently commonly used in the industry. The transportation cost of the pulp after dewatering and drying can be reduced by 60%.
[0024] Third, during the dewatering and thermal drying processes, the pulp fibers do not undergo relative friction, kneading, or large-arc bending with the dewatering and thermal drying equipment. As a result, the average fiber length loss of the pulp after dewatering and drying is smaller, and the folding endurance of the paper products processed downstream is higher, which greatly improves the quality and value of the pulp and paper products.
[0025] Fourth, the energy consumption and transportation volume of pulp dewatering and drying are significantly reduced, and the overall production cost is greatly reduced. This can effectively promote energy conservation, carbon reduction, cost reduction, quality improvement and investment enhancement in the pulp and paper industry, as well as the green transformation of production, and better help society achieve its "dual carbon" goals.
[0026] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0027] Figure 1 This is a front view schematic diagram of the structure of Embodiment 1 of this utility model.
[0028] Figure 2 This is a front view schematic diagram of the structure of Embodiment 2 of this utility model.
[0029] Figure 3 This is a front view schematic diagram of the structure of Embodiment 3 of this utility model.
[0030] Figure 4 This is a front view schematic diagram of the structure of Embodiment 4 of this utility model.
[0031] Figure 5 This is a front view schematic diagram of the structure of Embodiment 5 of this utility model.
[0032] Figure 6 This is a front view schematic diagram of the structure of Embodiment Six of this utility model.
[0033] Explanation of icon numbers
[0034] 1: Planar filter press 11: Filter press frame
[0035] 12: Filter cloth pressing device; 13: Filter cloth
[0036] 14: Filter cloth traction device 15: Filter press plate
[0037] 16: Hydraulic filter press unit; 2: Slurry plate shearing machine
[0038] 21: Shearing frame 22: Shearing fixed blade
[0039] 23: Shearing blade 24: Shearing drive unit
[0040] 3: Pulpboard stacker; 31: Stacker frame
[0041] 32: Stacking and lifting device; 33: Pallet conveying device
[0042] 34: Pallet shaping device; 4: Gravity dewatering machine
[0043] 41: Belt dewatering machine 42: Screw dewatering machine
[0044] 5: Heat drying box; 6: Pallet bundling machine Detailed Implementation
[0045] Please see Figure 1 As shown, the pulp dewatering and drying system of Embodiment 1 of this utility model mainly consists of a plane filter press 1, a pulp board shearing machine 2, and a pulp board stacking machine 3; the front end of the pulp board shearing machine 2 is connected and installed at the rear end of the plane filter press 1, and the front end of the pulp board stacking machine 3 is connected and installed at the rear end of the pulp board shearing machine 2.
[0046] The planar filter press 1 includes a filter press frame 11, a filter press cloth device 12, a filter cloth 13, a filter cloth traction device 14, a filter press plate 15, and a filter press hydraulic device 16. From the front end to the rear end of the planar filter press 1, the filter press cloth device 12, the filter press hydraulic device 16, and the filter cloth traction device 14 are installed sequentially on the filter press frame 11. The filter press plate 15 is installed on the filter press hydraulic device 16. The filter cloth 13 is wound around and movably connected to the filter press cloth device 12. One end of the filter cloth 13 is movably connected to the filter cloth traction device 14 above the filter press hydraulic device 16, and the other end is movably connected to the filter cloth traction device 14 via the filter press plate 15.
[0047] The slurry plate shearing machine 2 includes a shearing frame 21, a fixed shearing blade 22, a moving shearing blade 23, and a shearing drive device 24 arranged sequentially from bottom to top. The fixed shearing blade 22 and the shearing drive device 24 are respectively mounted on the shearing frame 21 from bottom to top. The moving shearing blade 23 is connected to the shearing drive device 24 above the fixed shearing blade 22. The cutting edges of the fixed shearing blade 22 and the moving shearing blade 23 are opposite each other. In order to further improve the shearing efficiency of the slurry plate and to shear the slurry plate into multiple smaller sheets laterally and / or longitudinally, the slurry plate shearing machine 2 can also be installed in multiple units along the transverse and / or longitudinal direction of the slurry plate conveying.
[0048] The slab stacking machine 3 includes a stacking frame 31, a stacking lifting device 32, a slab conveying device 33, and a slab shaping device 34. The stacking lifting device 32 is connected and installed on the stacking frame 31, the slab conveying device 33 is connected and installed on the stacking lifting device 32, and the slab shaping device 34 is connected and installed on the side of the slab conveying device 33.
[0049] Example 2:
[0050] Please see Figure 2 As shown, the pulp dewatering and drying system of Embodiment 2 of this utility model is similar to that of Embodiment 1, with the only difference being:
[0051] If the material requiring dewatering and drying is a "water pulp" with a dryness of about 3%, a gravity dewatering machine 4 is added to further improve the processing capacity of the pulp dewatering and drying system. The gravity dewatering machine 4 is a belt dewatering machine 41, which is connected and installed at the front end of the plane filter press 1. After the "water pulp" is pre-dewatered by the belt dewatering machine 41, it is discharged into the filter cloth device 12 of the plane filter press.
[0052] Example 3:
[0053] Please see Figure 3 As shown, the pulp dewatering and drying system of Embodiment 3 of this utility model is similar to that of Embodiment 2, with the only difference being:
[0054] The gravity dewatering machine 4 is a spiral dewatering machine 42.
[0055] To further reduce the moisture content of the pulp and extend its shelf life, a heat drying chamber 5 is added. The heat drying chamber 5 is connected to the front end of the pulp shearing machine 2 or the rear end of the pulp shearing machine 2 and connected to the front end of the pulp stacking machine 3. The heat drying chamber 5 is equipped with a multi-layer drying chain conveyor, and a heat pump is used to supply heat for drying the pulp.
[0056] Example 4:
[0057] Please see Figure 4 As shown, the pulp dewatering and drying system of Embodiment 4 of this utility model is similar to that of Embodiment 1, with the only difference being:
[0058] To facilitate handling and better achieve standardized packing or loading for transportation, a pallet tying machine 6 was added; the pallet tying machine 6 is connected and installed at the rear end of the plywood stacking machine 3.
[0059] Example 5:
[0060] Please see Figure 5 As shown, the pulp dewatering and drying system of Embodiment 5 of this utility model is similar to that of Embodiment 1, with the only difference being:
[0061] When the filter press hydraulic device 16 is installed through the filter cloth 13, the filter press plates 15 are each installed in two sets connected in parallel, one above and one below. The filter press cloth device 12 and the filter cloth traction device 14 can be installed in two sets connected in parallel, one above and one below, respectively, and are adapted to the two sets of filter press plates 15 connected in parallel, one above and one below (not shown in the figure).
[0062] To further enhance the pulp dewatering and drying capacity, the hydraulic filter press 16 is installed in series with two sets of filter cloth 13. Example Six:
[0063] Please see Figure 6 As shown, the pulp dewatering and drying system of Embodiment Six of this utility model is similar to that of Embodiment One, except that:
[0064] In order to further improve the pulp dewatering and drying capacity and avoid the pulp board bending during the dewatering process from affecting the folding endurance of the paper, the filter press hydraulic device 16 is installed in three sets in series with the filter cloth 13, and the filter plates 15 in the three sets of filter press hydraulic devices 16 are installed in two pieces, one on top and one on the bottom. The filter press cloth device 12 and the filter cloth traction device 14 are installed in two sets in parallel, one on top and one on the bottom.
[0065] In addition, when the filter press hydraulic device 16 is installed through multiple sets (such as three sets) of filter cloth 13, the filter press plate 15 installed on each set of filter press hydraulic device 16 can be installed as a set. The filter press cloth device 12 and the filter cloth traction device 14 can be respectively set up to be adapted to multiple sets of filter press hydraulic devices 16 (not shown in the figure).
[0066] The pulp dewatering and drying method of this utility model's pulp dewatering and drying system includes the following steps:
[0067] S1 Start-up System: Start the plane filter press 1, the slurry plate shearing machine 2 and the slurry plate stacking machine 3 respectively to put the system into start-up standby state.
[0068] S2 High-Pressure Dewatering: Low-dryness pulp is fed into the plane filter press 1. The filter cloth device 12 and the filter cloth traction device 14 are started simultaneously. The filter cloth device 12 lays and wraps the low-dryness pulp on the filter cloth 13 and is directly pulled and transported by the filter cloth traction device 14 to the filter hydraulic device 16 and between the filter plates 15 for high-pressure filtration and dewatering at 2-10 MPa. The filter hydraulic device 16 dewaters the low-dryness pulp into pulp plates with a dryness of 50%-75%.
[0069] S3 Slurry Plate Shearing: The filter cloth traction device 14 pulls the filter cloth 13 to move, and the filter cloth 13 conveys the slurry plate with a dryness of 50% to 75% out of the plane filter press 1 and passes between the shearing fixed blade 22 and the shearing moving blade 23 of the slurry plate shearing machine 2. After the filter cloth traction device 14 pulls the filter cloth 13 to run for the length of the filter press 15, it stops running. The shearing drive device 24 of the slurry plate shearing machine 2 drives the shearing moving blade 23 to perform a downward shearing action, and cuts the wet slurry plate into one or more sheets according to the set length.
[0070] S4 Pulp Board Stacking: The stacking lifting device 32 of the pulp board stacking machine 3 raises the board conveying device 33 from the initial stacking position to the initial stacking position. Pulp boards with a dryness of 50% to 75% after being cut by the pulp board shearing machine 2 are conveyed one by one onto the board conveying device 33 of the pulp board stacking machine 3. The board shaping device 34 shapes and aligns the pulp boards conveyed to the board conveying device 33 one by one. The stacking lifting device 32 descends layer by layer as the pulp boards are conveyed into the board conveying device 33 and shaped by the board shaping device 34. When the number of pulp boards stacked on the board conveying device 33 reaches the set number, the stacking lifting device 32 returns to the initial stacking position, and the board conveying device 33 starts to transport the pulp board stack out, which is then transported into the warehouse or packed for transportation.
[0071] In a specific embodiment of the dewatering and drying method of the pulp dewatering and drying system of this utility model, the pulp to be dewatered and dried is "water pulp" with a dryness of 3%, and the target dryness after dewatering is 50%. The filter plate 15 of the plane filter press 1 has a filter length and width of 1.5m, and the stacking of pulp plates after dewatering is set to 200 sheets / stack. The specific steps of the dewatering and drying method are as follows:
[0072] S1 Start-up System: Start the plane filter press 1, the slurry plate shearing machine 2 and the slurry plate stacking machine 3 respectively to put the system into start-up standby state.
[0073] S2 High-Pressure Dewatering: 3% dryness "water pulp" is pumped into the belt dewatering machine 41 for gravity pre-dewatering to 15% dryness. The 15% dryness pulp is discharged into the plane filter press 1. The filter cloth device 12 and the filter cloth traction device 14 start up simultaneously. The filter cloth device 12 lays and wraps the 15% dryness pulp on the filter cloth 13 and is directly pulled and transported by the filter cloth traction device 14 to the filter hydraulic device 16 between the filter plates 15 for high-pressure filtration and dewatering, starting at 2MPa and gradually increasing to 6MPa. The filter hydraulic device 16 dewaters the 15% dryness pulp into pulp plates with 50% dryness.
[0074] S3 Slurry Plate Shearing: The filter cloth traction device 14 pulls the filter cloth 13 to move, and the filter cloth 13 conveys the slurry plate with a dryness of 50% out of the plane filter press 1 and passes between the shearing fixed blade 22 and the shearing moving blade 23 of the slurry plate shearing machine 2. When the filter cloth traction device 14 pulls the filter cloth 13 for 1.5m, that is, after conveying the slurry plate with a length and width of 1.5m away from the plane filter press 1 by a length of 1.5m, it stops running. The shearing drive device 24 of the slurry plate shearing machine 2 drives the shearing moving blade 23 to perform a downward shearing action, and cuts the slurry plate into a standard size slurry plate with a length and width of 1.5m according to the set length of 1.5m.
[0075] S4 Pulp Board Stacking: The stacking lifting device 32 of the pulp board stacking machine 3 raises the board conveying device 33 from the initial stacking position to the initial stacking position. Pulp boards with a dryness of 50% and a length and width of 1.5m, which have been cut by the pulp board shearing machine 2, are conveyed one by one onto the board conveying device 33 of the pulp board stacking machine 3. The board shaping device 34 shapes and aligns the pulp boards conveyed to the board conveying device 33 one by one. The stacking lifting device 32 descends layer by layer as the pulp boards are conveyed into the board conveying device 33 and shaped by the board shaping device 34. When the number of pulp boards stacked on the board conveying device 33 reaches the set 200, the stacking lifting device 32 returns to the initial stacking position, and the board conveying device 33 starts to transport the pulp board stack out. The pulp board stacks are then transported, packed, and shipped.
[0076] In the second specific embodiment of the dewatering and drying method of the pulp dewatering and drying system of this utility model, the pulp to be dewatered and dried is 30% dryness. It is first dewatered to 75% dryness by the plane filter press 1, and then dried to 90% dryness by the hot drying chamber. The filter plate 15 of the plane filter press 1 has a filter length and width of 1.2m. After dewatering, the pulp sheets are stacked at 300 sheets / stack. The dewatering and drying method is similar to the previous embodiment, with the only difference being:
[0077] The pulp with a dryness of 30% is fed into the filter press cloth device 12 in S2. After being subjected to high pressure filtration and dewatering at 10MPa by the filter press hydraulic device 16 of the plane filter press 1, the dryness is 75%.
[0078] The 75% dryness of the pulp board in S4 is first dried to 90% dryness by heat pump in the pulp board drying box 5, and then stacked into a stack of 300 sheets / stack by the pulp board stacking machine 3.
[0079] The pulp boards with a dryness of 90% described in S4 are stacked into a stack of 300 sheets / stack by the pulp board stacking machine 3, and then bound by the stack binding machine 6 with iron wire or plastic binding tape.
[0080] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. 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 utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A pulp dewatering and drying system, characterized by: It includes a plane filter press (1), a slurry plate shearing machine (2), and a slurry plate stacking machine (3); the front end of the slurry plate shearing machine (2) is connected and installed at the rear end of the plane filter press (1), and the front end of the slurry plate stacking machine (3) is connected and installed at the rear end of the slurry plate shearing machine (2).
2. The paper pulp dewatering and drying system of claim 1, wherein: The planar filter press (1) includes a filter press frame (11), a filter press cloth device (12), a filter cloth (13), a filter cloth traction device (14), a filter press plate (15), and a filter press hydraulic device (16). From the front end to the rear end of the planar filter press (1), the filter press cloth device (12), the filter press hydraulic device (16), and the filter cloth traction device (14) are installed sequentially on the filter press frame (11). The filter press plate (15) is installed on the filter press hydraulic device (16). The filter cloth (13) is wound around and movably connected to the filter press cloth device (12). One end of the filter cloth (13) is movably connected to the filter cloth traction device (14) above the filter press hydraulic device (16), and the other end is movably connected to the filter cloth traction device (14) via the filter press plate (15). The slurry shearing machine (2) includes a shearing frame (21), a fixed shearing blade (22), a moving shearing blade (23), and a shearing drive device (24) arranged sequentially from bottom to top. The fixed shearing blade (22) and the shearing drive device (24) are respectively mounted on the shearing frame (21) from bottom to top. The moving shearing blade (23) is connected to the shearing drive device (24) above the fixed shearing blade (22). The cutting edges of the fixed shearing blade (22) and the moving shearing blade (23) are opposite to each other. The slab stacking machine (3) includes a stacking frame (31), a stacking lifting device (32), a slab conveying device (33), and a slab shaping device (34). The stacking lifting device (32) is connected and installed on the stacking frame (31), the slab conveying device (33) is connected and installed on the stacking lifting device (32), and the slab shaping device (34) is connected and installed on the side of the slab conveying device (33).
3. The paper pulp dewatering and drying system of claim 2, wherein: The filter press hydraulic device (16) is a set via the filter cloth (13); or multiple sets are matched in series. The filter cloth pressing device and the filter cloth traction device are a set and are adapted to one or more sets of the filter plates (15), or they are multiple sets in parallel connection and are adapted to multiple sets of the filter plates (15) respectively.
4. The paper pulp dewatering and drying system of claim 1, wherein: It also includes a gravity dewatering machine (4); the gravity dewatering machine (4) is connected and installed at the front end of the plane filter press (1).
5. The paper pulp dewatering and drying system of claim 1, wherein: It also includes a heat drying chamber (5); the heat drying chamber (5) is connected and installed at the front end of the slurry shearing machine (2) or The rear end of the slurry plate shearing machine (2) is connected to the front end of the slurry plate stacking machine (3).
6. The paper pulp dewatering and drying system of claim 4, wherein: The gravity dewatering machine (4) is either a belt dewatering machine (41) or a screw dewatering machine (42).
7. The paper pulp dewatering and drying system of claim 5, wherein: The heat drying box (5) is equipped with a single-layer or multi-layer drying chain conveyor; The hot drying box is heated by a heat pump or by high-temperature steam.
8. The paper pulp dewatering and drying system of claim 1, wherein: Also included is a board bundle strapping machine (6); the board bundle strapping machine (6) is connected and installed at the rear end of the pulp board stacking machine (3).