Impregnation swelling system

Abstract

The utility model relates to an impregnation swelling system, which comprises a first impregnation module, a second impregnation module, a regulation and control module and a slurry module, the first impregnation module comprises an impregnation container, and a guide roller and a slurry plate are integrally impregnated in the impregnation container; the second dipping module comprises a conveying mechanism, at least three liquid squeezing assemblies and a plurality of spraying mechanisms, the liquid squeezing assemblies are arranged at intervals in the conveying direction of the conveying mechanism and used for squeezing out part of the solvent in the pulp board, and the spraying mechanisms are arranged between at least two adjacent liquid squeezing assemblies; the regulation and control module comprises a supporting plate and a tooth-shaped compression roller matched with the supporting plate, and the tooth-shaped compression roller is used for extruding redundant solvent in the pulp board so as to regulate the mass ratio of the solvent to fibers in the pulp board; the pulp porridge module comprises first crushing equipment, and the first crushing equipment is used for crushing the pulp board into pulp porridge; the system can meet the implementation requirements of a new dipping and swelling process, is more environment-friendly and energy-saving, is more uniform in swelling, and can ensure that the mass ratio of fibers to a solvent in slurry congee meets the process requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of regenerated cellulose fiber production, in particular to an impregnation swelling system. Background Art

[0002] The existing production process of lyocell fiber usually includes the steps of mixing NMMO solution with cellulose pulp and swelling (impregnation swelling), dissolution, filtration, spinning and NMMO recovery. Among them, swelling is a relatively important step, specifically referring to the phenomenon that cellulose absorbs solvent in the solvent and expands in volume. The quality of swelling is directly related to the effect and quality of subsequent dissolution.

[0003] At present, in the production process of lyocell fiber, there are a variety of swelling systems, which can realize different swelling processes respectively. However, the existing swelling systems usually have problems such as high energy consumption, heavy dust, environmental pollution, uneven swelling and inability to guarantee the quality ratio. For example, a commonly used swelling system usually includes a crusher, a paddle mixer, a feeding hopper, a screw pump and a pre-dissolution kettle connected in sequence. When in use, the dry pulp board is first processed into small pulp blocks by the crusher, which are then fed into the paddle mixer by a conveyor belt after being weighed. At the same time, an appropriate amount of solvent (such as NMMO solution) is added to the paddle mixer to mix the crushed pulp with the solvent. After that, the paddle mixer rotates to mix the materials while pushing them into the screw pump feeding hopper, and then they are sent to the pre-dissolution kettle through the screw pump. The pre-dissolution kettle is further stirred to allow the fibers and the solvent to be fully immersed and swelled to form a pulp porridge. Finally, the pulp porridge is sent to a thin film evaporator through a screw pump for vacuum dehydration and dissolution. In practice, the dry pulp crushing process has high energy consumption, heavy dust, and environmental pollution; at the same time, there are dead corners in the process of mixing the crushed pulp with the solvent, which easily leads to uneven mixing, resulting in uneven swelling in the swelling system. In addition, it is difficult for this system to ensure that the mass ratio of fiber to solvent in the pulp porridge meets the process requirements. Therefore, there is an urgent need to develop a swelling system that is more environmentally friendly and energy-saving, has more uniform swelling, and can guarantee the mass ratio. Summary of the Invention

[0004] The first aspect of the present invention is to solve the problems of the existing swelling system such as high energy consumption, heavy dust, environmental pollution, uneven swelling and failure to guarantee the mass ratio. A new swelling system is provided, which is not only more environmentally friendly and energy-saving, but also more uniform in swelling and can guarantee the mass ratio. The main concept is:

[0005] A dipping and swelling system comprises a first dipping module, a second dipping module, a regulating module and a pulp porridge module, wherein the first dipping module comprises a dipping container and a guide roller, the guide roller is provided with a needle for inserting a pulp plate in the circumferential direction, the dipping container is used to contain a solvent, the guide roller is rotatably installed above or inside the dipping container, and the guide roller is used to drive the pulp plate to move forward along the dipping container; the second dipping module comprises a conveying mechanism, a plurality of squeezing components and a plurality of spraying mechanisms arranged downstream of the dipping container, the conveying mechanism is used to receive the upstream pulp plate and drive the pulp plate to be conveyed forward, the squeezing components are used to move along the conveying mechanism The pulp board is arranged at intervals in the feeding direction, and the extrusion assembly is used to squeeze out part of the solvent in the pulp board. The spraying mechanism is provided between at least two adjacent extrusion assemblies, and the spraying mechanism is used to spray the solvent onto the pulp board; the regulating module includes a support plate arranged downstream of the conveying mechanism and a toothed pressure roller arranged above the support plate, the support plate is used to support the pulp board, and there is a gap between the toothed pressure roller and the support plate for the pulp board to pass through, the toothed pressure roller is used to squeeze out excess solvent in the pulp board to adjust the mass ratio of solvent to fiber in the pulp board; the pulp porridge module includes a first crushing device arranged downstream of the regulating module, and the first crushing device is used to crush the pulp board into pulp porridge.This system can meet the implementation requirements of a new impregnation and swelling process, wherein, by configuring a first impregnation module and configuring an impregnation container and a guide roller in the first impregnation module, the unbroken pulp sheet can be immersed in the solvent liquid surface of the impregnation container as a whole, and the pulp sheet can be moved below the liquid surface of the solvent, so that the pulp sheet is indifferently in contact with the solvent, so that the pulp sheet can absorb the solvent more evenly and expand more evenly; by configuring a second impregnation module and configuring a conveying mechanism, a liquid squeezing component and a spraying mechanism that cooperate with each other in the second impregnation module, not only can part of the solvent in the impregnated pulp sheet be squeezed out, the penetration of the solvent in the pulp sheet can be increased by pressing, and dead corners of contact between the pulp sheet and the solvent can be prevented; and the ability of the pulp sheet to absorb the solvent again can be increased, so spraying the solvent on the pulp sheet after pressing can significantly increase the contact uniformity between the pulp sheet fibers and the solvent, making the impregnation more uniform, and can increase the mass ratio of the solvent to the fiber in the pulp sheet, so that the mass ratio is greater than the process requirements ; By configuring the control module and configuring a support plate and a toothed pressure roller adapted to the support plate in the control module, the toothed pressure roller and the support plate can be used to cooperate to squeeze the pulp plate, squeeze out the excess solvent in the pulp plate, reduce the mass ratio of solvent to fiber in the pulp plate, and finally meet the process requirements; finally, the pulp plate that meets the process requirements can be crushed into pulp porridge through the pulp porridge module. Since the pulp plate has been soaked and swollen evenly at this time, the crushing process will not cause pollution, the power required for crushing is smaller, and the crushing is more uniform, which can effectively solve the drawbacks of the prior art of pre-crushing dry pulp plates; in addition, compared with the prior art, the system can also ensure that the fibers are fully and evenly contacted with the solvent and expand, and the expansion is more uniform. It can be continuously fed and produced without batch differences of the intermittent swelling method, and can greatly reduce energy consumption, making the production process more energy-efficient. In addition, the system can also effectively adjust the mass ratio of the pulp porridge, effectively ensuring that the mass ratio of fiber to solvent in the pulp porridge meets the process requirements.

[0006] Furthermore, the first impregnation module further includes a plurality of rollers rotatably mounted above or within the impregnation container. A gap is formed between the rollers and the impregnation container for the pulp sheet to pass through. The rollers are alternately arranged with guide rollers. The rollers are used to squeeze the pulp sheet and prevent it from arching and deforming as it moves forward. The rollers are used to restrain the pulp sheet downward, ensuring that it moves below the liquid level in the impregnation container, thereby achieving more complete, uniform, and efficient impregnation of the uncomminuted pulp sheet.

[0007] Preferably, the two ends of the immersion container are respectively constructed as slope structures.

[0008] Preferably, the inclination angle of the slope-shaped structure is less than 15°.

[0009] The second aspect of the present invention aims to solve the problem of coordinated cooperation between the conveying process and the extrusion process. Preferably, the conveying mechanism includes a driving roller, a driven roller, and a conveyor belt tensioned between the driving roller and the driven roller; the extrusion assembly includes a pressure roller and an idler roller, the idler roller is arranged on the inner side of the conveyor belt, the pressure roller is arranged above the conveying mechanism, and the corresponding idler roller has a gap between the pressure roller and the upper surface of the conveyor belt for the pulp sheet to pass through. The pulp sheet is squeezed by the cooperation between the pressure roller and the idler roller, so that the conveying and extrusion processes of the pulp sheet can be coordinated.

[0010] Preferably, the conveyor belt is a high-strength mesh belt with a temperature resistance exceeding 80° C. This can stably and steadily support the pulp plate and facilitate the smooth recovery of the extruded solvent.

[0011] Preferably, the spraying mechanism uses a spray pipe with a nozzle or spray hole configured on the side of the spray pipe. Each spray pipe is connected to a delivery pump through a pipeline. The delivery pump is connected to a solvent collection tank for storing solvent. The solvent collection tank is equipped with a filter. The delivery pump delivers the filtered solvent to the spray pipe through the pipeline, and the solvent is discharged from the nozzle or spray hole of the spray pipe, thereby achieving the purpose of spraying the pulp board.

[0012] Preferably, the toothed roller has multiple toothed protrusions in the circumferential direction, and the side of each toothed protrusion facing away from the center of the roller is a blunt structure, so that the contact area between the toothed protrusion and the pulp sheet is larger, thereby achieving the purpose of squeezing the pulp sheet.

[0013] Preferably, a plurality of toothed pressing rollers are arranged along the length direction of the support plate, so as to realize multi-stage extrusion of the pulp plate.

[0014] In order to solve the problem of facilitating the recovery of excess solvent, preferably, the support plate is constructed with a leakage hole to ensure that the squeezed solvent can smoothly flow out through the leakage hole and be discharged into the solvent collection tank below.

[0015] Furthermore, it also includes a solvent collection tank, the conveying mechanism and / or the supporting plate are arranged above the solvent collection tank, and the solvent collection tank is used to recover the solvent.

[0016] Furthermore, the porridge module also includes an extrusion device and a second crushing device. The extrusion device is connected to the output end of the first crushing device and is used to extrude the porridge and form block porridge. The second crushing device is connected to the extrusion device and is used to crush the block porridge.

[0017] Preferably, the extrusion equipment is a variable pitch screw extruder.

[0018] The third aspect of the present invention aims to solve the problem of accurately controlling the mass ratio of solvent to fiber in the pulp sheet to ensure that this mass ratio meets process requirements. Furthermore, the control module also includes a vertical adjustment mechanism, and the toothed pressure roller is arranged above the support plate by the vertical adjustment mechanism, so that the gap between the toothed pressure roller and the support plate is adjustable. In actual use, the gap between the toothed pressure roller and the support plate can be adjusted according to actual needs. This not only meets the needs of pulp sheets of different thicknesses and different processes, significantly improving the versatility of the impregnation and swelling system and process, but also can accurately control the mass ratio of solvent to fiber in the pulp sheet to ensure that this mass ratio meets process requirements.

[0019] Furthermore, the first impregnation module further includes a vertical adjustment mechanism, and the guide roller is arranged above the impregnation container in a liftable manner through the vertical adjustment mechanism, so that the gap between the guide roller and the impregnation container is adjustable.

[0020] Furthermore, the first impregnation module further includes a vertical adjustment mechanism, and the roller is arranged above the impregnation container in a liftable manner through the vertical adjustment mechanism, so that the gap between the roller and the impregnation container is adjustable.

[0021] Furthermore, the second impregnation module further includes a vertical adjustment mechanism, and the pressure roller is arranged above the support roller in a liftable manner through the vertical adjustment mechanism, so that the gap between the pressure roller and the support roller is adjustable.

[0022] Preferably, the vertical adjustment mechanism includes a movable frame, an adjustment power, and a guide structure, wherein the guide structure includes a guide portion and a sliding portion that adapt to each other, the guide portion being arranged in the vertical direction and mounted on the support frame, the sliding portion being movably constrained to the guide portion, and the movable frame being connected to the sliding portion; the adjustment power is transmission-connected to the movable frame for driving the movable frame to vertically lift and lower, and the movable frame is configured with an assembly hole. The assembly hole allows for convenient assembly of a toothed pressure roller, guide roller, rotating roller, or pressure roller, etc.

[0023] Compared with the existing technology, the impregnation and swelling system provided by the utility model can meet the implementation requirements of a new impregnation and swelling process. It is not only more environmentally friendly and energy-saving, and can achieve continuous production, but also has more uniform swelling and can ensure that the mass ratio of fiber to solvent in the porridge meets the process requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a structural schematic diagram of a pulp plate impregnated and swelled by using an impregnation and swelling system provided by the utility model.

[0025] Figure 2 The utility model is a structural schematic diagram of a soaking and swelling system for producing porridge.

[0026] Figure 3In an impregnation swelling system provided in Example 2 of the present invention, both ends of the toothed pressure roller are respectively installed on a main view of a vertical adjustment mechanism.

[0027] Figure 4 In the immersion swelling system provided in Example 2 of the present invention, both ends of the toothed pressure roller are respectively installed at Figure 3 Side view of the vertical adjustment mechanism shown.

[0028] Figure 5 In an impregnation swelling system provided in Example 2 of the present invention, both ends of the toothed pressure roller are respectively installed on a main view of another vertical adjustment mechanism.

[0029] Figure 6 In the immersion swelling system provided in Example 2 of the present invention, both ends of the toothed pressure roller are respectively installed at Figure 5 Front view of the vertical adjustment mechanism shown.

[0030] Figure 7 In an impregnation swelling system provided in Example 3 of the present utility model, both ends of the guide roller are respectively installed on a main view of a vertical adjustment mechanism.

[0031] Figure 8 In the immersion swelling system provided in Example 3 of the present invention, both ends of the guide roller are respectively installed at Figure 7 Front view of the vertical adjustment mechanism shown.

[0032] Figure 9 In an impregnation swelling system provided in Example 4 of the present utility model, both ends of the pressure roller are respectively installed on a main view of a vertical adjustment mechanism.

[0033] Figure 10 In the immersion swelling system provided in Example 4 of the present invention, both ends of the pressing roller are respectively installed at Figure 9 Front view of the vertical adjustment mechanism shown.

[0034] Figure 11 In an immersion swelling system provided in Example 5 of the present utility model, both ends of the roller are respectively installed on a main view of a vertical adjustment mechanism.

[0035] Explanation of the marks in the figure: first impregnation module 1, impregnation container 11, guide roller 12, needling 13, rotating roller 13; second impregnation module 2, active roller 21, driven roller 22, conveyor belt 23, extrusion component 24, pressure roller 25, support roller 26; control module 3, support plate 31, toothed pressure roller 32, toothed protrusion 33; porridge module 4, first crushing equipment 41, extrusion equipment 42, second crushing equipment 43, screw conveyor 44; supporting frame 5, spraying mechanism 51, solvent collection tank 52, bearing 53; vertical adjustment mechanism 6, movable frame 60, assembly hole 601, limit hole 602, adjustment power 61, coupling 62, screw 63, limit block 631, threaded hole 64, guide rail 65, slider 66, guide hole 67, guide rod 68, movable frame 69; pulp plate 7. DETAILED DESCRIPTION

[0036] Example 1

[0037] This embodiment provides a fiber impregnation and swelling system, comprising a first impregnation module 1, a second impregnation module 2, a control module 3 and a porridge module 4, wherein:

[0038] like Figure 1 As shown, the first impregnation module 1 includes an impregnation container 11 for holding a solvent, a guide roller 12, and a rotating roller 14. The impregnation container 11 only needs to be able to hold the solvent, and this embodiment does not limit its specific shape. For example, the impregnation container 11 may include a front portion, a rear portion, a bottom portion, and two end portions. The front portion and the rear portion are arranged opposite each other, and the two end portions are arranged opposite each other and connected to the front portion and the rear portion, respectively. The front portion, the rear portion, and the lower ends of the two end portions are respectively connected to the bottom portion, so as to form a trough-shaped container. Figure 1 In practice, the two ends of the immersion container 11 can be constructed as slope structures, such as Figure 1 As shown, the slurry sheet 7 is guided along the bottom of the impregnation container 11 without causing the slurry sheet to arch when encountering obstacles, thereby preventing the slurry sheet from accumulating or clogging. In practice, the sloped structure can have an inclination angle (i.e., the angle with the horizontal plane) of less than 15°, ensuring a smooth transition between the end and the bottom, thereby facilitating the movement of the expanded slurry sheet along the bottom of the impregnation container 11 without causing the slurry sheet to arch when encountering obstacles.

[0039] In this embodiment, the guide roller 12 can be installed above or inside the dipping container 11 through the bearing 53. Figure 1 As shown, in practice, the guide roller 12 can be installed on the impregnation container 11 or on the support frame, so that the guide roller 12 has the freedom to rotate relative to the impregnation container 11. Figure 1 As shown, the guide roller 12 includes a roller and a needle 13 provided on the surface of the roller. The roller is constructed as a cylindrical structure, and the end of the needle 13 away from the roller is constructed as a pointed structure, as shown in FIG. Figure 1 As shown, each needle puncture 13 can be evenly distributed along the surface of the roller so as to be more evenly inserted into the pulp sheet. There is a gap between the guide roller 12 and the impregnation container 11. When in use, the pulp sheet 7 can pass between the impregnation container 11 and the guide roller 12, and the needle puncture 13 on the guide roller 12 can be continuously inserted into the pulp sheet. On the one hand, not only can the guide roller 12 drive the pulp sheet to move forward below the liquid surface of the solvent through the needle puncture 13, preventing the pulp sheet and the guide roller 12 from sliding relative to each other, but also the residence time of the pulp sheet in the impregnation container 11 can be accurately controlled to obtain a more accurate and better impregnation effect. On the other hand, the needle puncture 13 can be inserted into the interior of the pulp sheet. When the needle puncture 13 exits the pulp sheet, puncture holes will be formed on the pulp sheet. The external solvent can penetrate into the interior of the pulp sheet more dispersedly and evenly through the puncture holes, which not only improves the impregnation efficiency, but also ensures that the pulp sheet can be more fully and evenly impregnated with the solvent without being crushed, which is conducive to achieving a better impregnation effect. Thirdly, by driving the pulp plate forward through the guide roller 12, the effects of continuous feeding and continuous operation can be achieved, which can significantly improve efficiency.

[0040] like Figure 1 As shown, in this embodiment, the roller 14 can also be rotatably mounted above or inside the dipping container 11 via a bearing 53, so that the roller 14 has the freedom to rotate relative to the dipping container 11. Similarly, the roller 14 can be mounted on the dipping container 11 or the supporting frame. For example, the roller 14 is also constructed as a cylindrical structure, and there is also a gap between the roller 14 and the dipping container 11, as shown in FIG. Figure 1 As shown, when in use, the pulp sheet 7 can pass between the impregnation container 11 and the roller 14, and the roller 14 can restrain and squeeze the pulp sheet downward. When the pulp sheet passes through the roller 14, the pressure of the roller 14 can increase the penetration of the solvent in the pulp sheet; at the same time, part of the solvent in the pulp sheet can also be squeezed out in the solvent, so that the pulp sheet has a certain suction force. After the pulp sheet passes through the roller 14, the pulp sheet can reabsorb the solvent, which is beneficial to improving the impregnation efficiency and making the impregnation more complete, and it is not easy to have an impregnation dead corner.

[0041] During implementation, the number of guide rollers 12 can be determined according to actual needs. Similarly, the number of rotating rollers 14 and the relative position relationship between the rotating rollers 14 and the guide rollers 12 can also be determined according to actual needs. For example, in a preferred embodiment, a plurality of rotating rollers 14 are further arranged above the impregnation container 11, and the rotating rollers 14 and the guide rollers 12 are arranged alternately, such as Figure 1As shown, through the alternating cooperation between the rotating roller 14 and the guide roller 12, especially in the process of the pulp sheet reabsorbing the solvent, it just passes through the guide roller 12. Even puncture holes that penetrate deep into the interior of the pulp sheet can be formed on the pulp sheet after passing through the guide roller 12, which cooperates with the suction force during the expansion of the pulp sheet, which is conducive to achieving a more uniform and efficient impregnation effect; when the pulp sheet with puncture holes moves to the next rotating roller 14, under the pressure of the rotating roller 14, the solvent can penetrate into the interior of the pulp sheet through the puncture holes, thereby completing the impregnation of the uncrushed pulp sheet more fully, more evenly and more efficiently.

[0042] For example, in this embodiment, a guide roller 12 is provided at the middle position of the dipping container 11. Figure 1 As shown, the pulp sheet can fit the bottom of the immersion container 11 and continue to move forward under the liquid surface. At the same time, guide rollers 12 are also provided at both ends of the immersion container 11, so that the pulp sheet can better fit the two ends of the immersion container 11. At the same time, a rotating roller 14 is also provided between the adjacent two guide rollers 12. Figure 1 As shown, the rotating roller 14 can be used in conjunction with the guide roller 12, which is conducive to completing the impregnation of the uncrushed pulp board more fully, evenly and efficiently. Figure 1 As shown, one or more rollers 14 are further configured upstream of the upstream guide roller 12 to limit and constrain the dry pulp sheet so that the dry pulp sheet can be flatly transported and smoothly flatly transported into the impregnation container 11. Correspondingly, one or more rollers 14 are further configured downstream of the downstream guide roller 12, as shown in FIG. Figure 1 As shown, it is ensured that the pulp sheet can be smoothly and stably laid flat and fed into the downstream conveying mechanism.

[0043] In one embodiment, the roller of the guide roller 12 can be an electric roller (that is, the power is configured inside the roller) so that the electric roller can be used to drive the entire guide roller 12 to rotate at a set speed. In another embodiment, the first impregnation module 1 also includes a first motor, which is connected to the guide roller 12 for driving the guide roller 12 to rotate. The first motor can be a servo motor or a stepper motor. The first motor can be connected to the guide roller 12 through a first transmission mechanism such as a gear transmission mechanism, a belt transmission mechanism, or a chain transmission mechanism. In this embodiment, the impregnation container 11 is constructed in a flat shape, so that the guide roller 12 can drive the pulp plate 7 in the impregnation container 11 to move forward, and can not pass through the front and rear of the impregnation container 11, so there is no need to consider the sealing, which is conducive to simplifying the structure. In practice, the roller 14 may not be powered; it can simply rotate freely driven by the pulp sheet. However, in a preferred embodiment, the roller 14 can actively rotate to reduce stress on the pulp sheet and prevent it from breaking or becoming blocked. In one embodiment, the roller 14 can be a motorized roller. In this case, the power is internal to the roller 14, eliminating the need for an external power source. In another embodiment, the first impregnation module 1 further includes a second motor, which can be connected to the roller 14 via a second transmission mechanism such as a gear transmission mechanism, a belt transmission mechanism, or a chain transmission mechanism to drive the roller 14 to actively rotate.

[0044] In this embodiment, the second impregnation module 2 includes a conveying mechanism arranged downstream of the impregnation container 11, at least three squeezing components 24 and a plurality of spraying mechanisms 51, such as Figure 1 As shown, the conveying mechanism is mainly used to receive the upstream pulp board and drive the pulp board to continue to be conveyed forward. The conveying mechanism may include an active roller 21, a driven roller 22 and a conveyor belt 23 tensioned on the active roller 21 and the driven roller 22, as shown in FIG. Figure 1 As shown, the conveyor belt 23 can preferably adopt a high-strength mesh belt with a temperature resistance of over 80°C, such as a stainless steel mesh belt, which can stably and steadily support the pulp plate and allow the squeezed solvent to fall smoothly so that the solvent can be recovered smoothly. Therefore, in a more complete solution, the second impregnation module 2 also includes a solvent collection tank 52, such as Figure 1 As shown, the conveying mechanism can be positioned above the solvent collection tank 52, allowing the solvent collection tank 52 to catch any falling solvent, thereby achieving the purpose of collecting the solvent. In practice, the conveying mechanism also includes a third motor, which is in transmission connection with the driving roller 21 to drive the conveyor belt 23 in a circular motion. In practice, the third motor can preferably be a servo motor or a stepper motor. A transition plate can also be positioned between the impregnation container 11 and the upper surface of the conveying mechanism to facilitate smoother entry of the pulp sheet within the impregnation container 11 into the conveying mechanism.

[0045] In the embodiment, the liquid squeezing components 24 are arranged at intervals along the conveying direction of the conveying mechanism, and the liquid squeezing components 24 are used to squeeze out part of the solvent in the pulp plate, such as Figure 1 As shown, the spraying mechanism 51 is provided between at least two adjacent squeezing assemblies 24, and the spraying mechanism 51 is used to spray a solvent, such as NMMO solution, onto the pulp plate 7. In implementation, the squeezing assembly 24 includes a pressing roller 25 and a supporting roller 26, as shown in FIG. Figure 1 As shown, the idler 26 is arranged on the inner side of the conveyor belt 23, and the pressure roller 25 is arranged above the conveying mechanism, and the conveyor belt 23 passes between the idler 26 and the pressure roller 25, and there is a gap between the pressure roller 25 and the conveyor belt 23 for the pulp sheet to pass through, and the pulp sheet is squeezed by the cooperation of the pressure roller 25 and the idler 26. Specifically, the idler 26 can be connected to the support frame 5 through the bearing 53. Similarly, the pressure roller 25 can also be connected to the support frame 5 through the bearing 53. In some embodiments, the pressure roller 25 in the extrusion assembly 24 may not be equipped with power, but in a preferred embodiment, the second impregnation module 2 further includes a fourth motor, which is in transmission connection with the pressure roller 25 in the extrusion assembly 24 for driving the pressure roller 25 to rotate. During implementation, the number of extrusion assemblies 24 can be determined according to actual needs. For example, Figure 1 As shown, the second impregnation module 2 is equipped with three squeezing components 24, and a spraying mechanism 51 is provided between two adjacent squeezing components 24. Figure 1 As shown, the spray mechanism 51 utilizes a spray pipe with nozzles or orifices configured on the sides. Each spray pipe is connected to a delivery pump via a pipeline, which in turn is connected to a container for storing solvent, which may be a solvent collection tank 52 equipped with a filter. The delivery pump delivers the filtered solvent via a pipeline to the spray pipe, where it exits through the nozzles or orifices of the spray pipe, thereby spraying the pulp sheet. During use, the squeezing assembly 24 cooperates with the spray mechanism 51, causing the press roller 25 to squeeze out some of the solvent from the solvent-soaked pulp sheet, which then absorbs the sprayed solvent. Repeated use of this method ensures more uniform impregnation of the solvent and fiber, resulting in more complete swelling.

[0046] In addition, during implementation, a spray mechanism 51 may also be configured upstream of the guide roller 12 in the first impregnation module 1, such as Figure 1 As shown, the spraying mechanism 51 is also connected to the conveyor through a pipeline. The spraying mechanism 51 is used to spray the solvent onto the pulp board before the pulp board enters the impregnation container 11. The sprayed solvent can be a fresh solvent, which is more conducive to the solvent penetrating into the dry and uncrushed pulp board, and is conducive to more complete and uniform impregnation.

[0047] In this embodiment, the control module 3 includes a support plate 31 arranged downstream of the conveying mechanism and a toothed pressure roller 32 arranged above the support plate 31. Figure 1As shown, the support plate 31 is used to support the pulp plate, and the pulp plate passes between the toothed pressure roller 32 and the support plate 31. The toothed pressure roller 32 is used to squeeze out the excess solvent in the pulp plate 7 so that the mass ratio of the solvent to the fiber in the pulp plate meets the process requirements. During implementation, the support plate 31 can preferably adopt a stainless steel plate with leakage holes to ensure that the squeezed solvent can flow out smoothly through the leakage holes and be discharged into the solvent collection tank 52 below. Therefore, in a more complete embodiment, a solvent collection tank 52 is also provided below the support plate 31, and the solvent collection tank 52 is used to collect the solvent. During implementation, a solvent collection tank 52 can be provided for each of the conveying mechanism and the control module 3, or the conveying mechanism and the control module 3 can share a solvent collection tank 52.

[0048] In this embodiment, the toothed pressure roller 32 includes a roller and a plurality of toothed protrusions 33 arranged in the circumferential direction of the roller. The toothed protrusions 33 can be evenly arranged, and the side of the toothed protrusions 33 away from the center of the roller is a blunt head structure, such as Figure 1 As shown, the contact area between the toothed protrusions 33 and the pulp sheet is larger, achieving the purpose of squeezing the pulp sheet. During implementation, the toothed pressure roller 32 can be connected to the carrier frame 5 and / or the support plate 31 via a bearing 53, so that the toothed pressure roller 32 has the freedom to rotate relative to the support plate 31. In addition, the control module 3 also includes a fifth motor, which can preferably be a servo motor or a stepper motor. The fifth motor is connected to the toothed pressure roller 32 via a transmission mechanism such as a coupling, a gear transmission mechanism, a belt transmission mechanism, or a chain transmission mechanism to drive the toothed pressure roller 32 to rotate at a set speed.

[0049] During implementation, the number of toothed pressure rollers 32 can be determined according to actual needs. Preferably, a plurality of toothed pressure rollers 32 are arranged along the moving direction of the pulp plate 7, such as Figure 1 As shown, multi-stage extrusion of the pulp sheet can be achieved by multiple toothed pressure rollers 32. Through multi-stage extrusion, on the one hand, part of the solvent can be squeezed out step by step, thereby gradually improving the mass ratio of the solvent to the fiber in the pulp sheet, making it easier to control the mass ratio of the solvent to the fiber in the pulp sheet to the process requirements, and not prone to the problem of too much pressure causing the mass ratio to be lower than the process requirements, which can effectively improve the accuracy and reliability of this process; on the other hand, the pulp sheet can be pressed more evenly and dispersedly, ensuring a more even distribution of the solvent inside the pulp sheet, and preventing the situation where the local solvent content is very high and the local solvent content is very low, which can further ensure the quality and effect of the impregnation and swelling. As an example, Figure 1 As shown, two toothed pressure rollers 32 are arranged along the moving direction of the pulp plate 7.

[0050] like Figure 1 and Figure 2As shown, in this embodiment, the porridge module 4 includes a first crushing device 41, an extrusion device 42 and a second crushing device 43 arranged downstream of the support plate 31, wherein Figure 1 and Figure 2 As shown, the support plate 31 is connected to the inlet of the first crushing device 41, and the first crushing device 41 is mainly used to crush the pulp plate into pulp porridge; Figure 1 and Figure 2 As shown, the extrusion device 42 is connected to the output end of the first crushing device 41, and is used to squeeze the porridge and form a block of porridge. During implementation, the extrusion device 42 ensures that the crushed loose porridge is squeezed to a certain extent, and the squeezing degree is such that the porridge is formed into blocks but the solvent does not flow out. Therefore, in this embodiment, the extrusion device 42 preferably adopts a variable pitch screw extruder, such as Figure 1 and Figure 2 The second crushing device 43 is connected to the extrusion device 42 and is used to crush the block porridge. Figure 1 and Figure 2 As shown, during implementation, the first crushing equipment 41 can adopt existing equipment, and the first crushing equipment 41 can be preferably equipped with a toothed crushing roller or a comb-type crushing roller; accordingly, the second crushing equipment 43 can also adopt existing equipment, and the second crushing equipment 43 can also be preferably equipped with a toothed crushing roller or a comb-type crushing roller.

[0051] In a more complete solution, the porridge module 4 further includes a screw conveyor 44 connected to the second crushing device 43, such as Figure 2 As shown, the screw conveyor 44 is used to smoothly feed the porridge into the downstream thin film evaporator.

[0052] In order to achieve a better impregnation effect, the system also includes a controller. At the same time, a first temperature sensor and a first heater are provided in the impregnation container 11. The first heater can preferably be an electric heater. The first temperature sensor and the first heater are respectively connected to the controller to ensure that the temperature of the solvent in the impregnation container 11 can be accurately controlled to ensure a better impregnation effect.

[0053] Similarly, a second temperature sensor and a second heater are provided within the solvent collection tank 52. The second heater can preferably be an electric heater. The second temperature sensor and the second heater are respectively connected to a controller to precisely control the temperature of the solvent within the solvent collection tank 52. In practice, the delivery pump can be connected to the solvent collection tank 52 to supply solvent to the spray mechanism 51 from the solvent collection tank 52. During normal production, the prepared solvent can be continuously added to the immersion container 11.

[0054] The process of treating the pulp board using the impregnation swelling system provided in this embodiment is as follows:

[0055] (1) The pulp sheet in roll or sheet form is flatly conveyed to the impregnation container 11. The impregnation container 11 is filled with solvent. The pulp sheet 7 is flatly conveyed into one end of the impregnation container 11 and is immersed in the liquid surface as a whole. The pulp sheet 7 continues to move forward under the liquid surface and leaves the solvent from the other end of the impregnation container 11. Figure 1 or Figure 2 As shown, in this process, the pulp sheet is brought into contact with the solvent indiscriminately, achieving a better impregnation and swelling effect.

[0056] (2) The pulp sheet 7 leaving the solvent moves horizontally into the conveyor belt and is transported along the conveyor belt. Figure 1 or Figure 2 As shown; during the conveying process, the conveyed pulp sheet is squeezed at least three times by the squeezing component 24, and between two adjacent squeezing processes, the solvent is sprayed onto the pulp sheet by the spraying mechanism 51, so that the mass ratio of the solvent to the fiber is greater than the process requirements.

[0057] (3) The pulp sheet 7 moves forward with the transmission belt to the support plate 31, and the pulp sheet is squeezed by the toothed pressing roller 32 matched with the support plate 31 to squeeze out the excess solvent in the pulp sheet so that the mass ratio of the solvent to the fiber in the pulp sheet meets the process requirements, such as Figure 1 or Figure 2 shown.

[0058] (4) The pulp sheet 7 is fed into the first crushing device 41, and the pulp sheet is crushed into pulp porridge by the first crushing device 41.

[0059] (5) The porridge is input into the extrusion device 42 and extruded into block-shaped porridge.

[0060] (6) The block pulp is fed into the second crushing device 43, and the block pulp is crushed by the second crushing device 43, and can be fed into the downstream thin film evaporator through the screw conveyor 44 for evaporation and dissolution. This system has at least the following advantages: First, the process of first impregnating the pulp plate and then crushing it avoids the disadvantages of dust pollution, uneven crushing, and huge power consumption caused by crushing the dry pulp plate. Second, in this process, the pulp plate is immersed in the solvent indiscriminately, ensuring that the pulp plate absorbs the solvent uniformly and expands uniformly. Third, this system uses a pressure roller 25 to press the impregnated and expanded pulp plate to promote full contact between the solvent and the fiber, and the production control is simple and reliable. Fourth, this system can continuously feed and produce, without batch differences of the intermittent swelling method. Fifth, this system avoids the high energy-consuming process of stirring high-viscosity pulp in the reactor container in the existing lyocell fiber production process to achieve full mixing and swelling of the fiber and the solvent, which is more energy-efficient than the existing production method. Sixth, this system can also realize full-process automatic control, which reduces the use of manpower compared with the existing lyocell fiber production swelling process and greatly reduces costs.

[0061] Example 2

[0062] The main difference between the present embodiment 2 and the above-mentioned embodiment 1 is that in the impregnation and swelling system provided in the present embodiment, the toothed pressing roller 32 is arranged above the supporting plate 31 in a liftable manner. Figure 3-Figure 6 As shown, the gap between the toothed pressure roller 32 and the support plate 31 can be adjusted according to actual needs, which can not only meet the needs of pulp boards of different thicknesses and different processes, significantly improve the versatility of the impregnation swelling system and process, but also accurately control the mass ratio of solvent to fiber in the pulp board to ensure that the mass ratio meets the process requirements.

[0063] During implementation, the support plate 31 can be fixedly mounted on the carrier 5. The carrier 5 is used to support the support plate 31. The support plate 31 can be arranged horizontally, such as Figure 1-Figure 2 In order to set the toothed pressure roller 32 to be liftable above the support plate 31, during implementation, the control module 3 also includes a vertical adjustment mechanism 6, such as Figure 3-Figure 6 As shown, the vertical adjustment mechanism 6 includes a movable frame 60, an adjustment power 61, and a guide structure, wherein the guide structure includes a guide portion and a sliding portion that are adapted to each other. The guide portion is arranged in the vertical direction and is directly or indirectly provided on the support frame 5. The sliding portion is movably constrained to the guide portion. The movable frame 60 is connected to the sliding portion to prevent the movable frame 60 from rotating relative to the sliding portion. The adjustment power 61 is in transmission connection with the movable frame 60 to drive the movable frame 60 to move vertically. During implementation, the vertical adjustment mechanism 6 is respectively provided at both ends of the toothed pressure roller 32, and the two ends of the toothed pressure roller 32 are respectively connected to the movable frame 60, so that the adjustment power 61 can be used to drive the movable frame 60 to move vertically, and the vertical movement of the movable frame 60 can drive the toothed pressure roller 32 to move vertically, thereby achieving the purpose of adjusting the size of the gap between the toothed pressure roller 32 and the support plate 31.

[0064] In one embodiment, the adjustment power 61 can be a motor. In this case, the vertical adjustment mechanism 6 further includes a screw 63. Figure 3 and Figure 4 As shown, the movable frame 60 is provided with a threaded hole 64 adapted to the screw 63. The movable frame 60 is threadedly connected to the screw 63. The screw 63 is arranged vertically, and one end of the screw 63 is connected to the motor. For example, the screw 63 can be connected to the motor through a coupling 62. When in use, the motor drives the screw 63 to rotate. Due to the cooperation between the guide part and the sliding part, the movable frame 60 can be vertically raised and lowered under the drive of the screw 63. In practice, the guide structure has various embodiments. For example, when the guide part adopts a guide rail 65, the sliding part is a slider 66 adapted to the guide rail 65. In this case, the motor can be fixedly installed on the carrier frame 5, as shown in FIG. Figure 3 and Figure 4As shown. For another example, when the guide portion is a guide hole 67 constructed in the carrier 5, the sliding portion can be a guide rod 68 adapted to the guide hole 67. The guide rod 68 vertically passes through the guide hole 67. The guide rod 68 cooperates with the guide hole 67 to achieve the guiding function. In addition, when the guide portion is a guide groove constructed in the carrier 5, the sliding portion can be a guide block adapted to the guide groove. The guide groove and the guide block cooperate to achieve the guiding function.

[0065] In another embodiment, Figure 5 and Figure 6 As shown, the adjustment power 61 adopts a motor, the vertical adjustment mechanism 6 also includes a screw 63, the carrier 5 is constructed with a threaded hole 64 adapted to the screw 63, the screw 63 is arranged vertically and is threadedly connected to the threaded hole 64, the movable frame 60 is provided with a limiting hole 602, the diameter of the limiting hole 602 is larger than the diameter of the screw 63, the lower end of the screw 63 passes through the limiting hole 602, the screw 63 can rotate relative to the limiting hole 602, and the lower end of the screw 63 is provided with a limiting block 631 for limiting, as shown in FIG. Figure 5 and Figure 6 As shown, the upper end of the screw 63 is connected to the motor through the coupling 62. The guide portion adopts a guide hole 67 constructed on the carrier 5, and correspondingly, the sliding portion adopts a guide rod 68 adapted to the guide hole 67, as shown in FIG. Figure 5 and Figure 6 As shown, the upper ends of the guide rods 68 are fixed to the movable frames 69, and the lower ends of the guide rods 68 can be connected to the movable frames 60. The motor is fixedly mounted on the movable frames 69. When in use, the motor drives the screw 63 to rotate, thereby driving the movable frame 60, the screw 63, the guide rods 68 and the motor to rise and fall vertically together.

[0066] In order to facilitate assembly, during implementation, the movable frame 60 is also provided with an assembly hole 601, such as Figure 3 or Figure 5 As shown, during assembly, the toothed pressure roller 32 can be connected to the assembly hole 601 through the bearing 53, thereby conveniently completing the installation of the toothed pressure roller 32. During implementation, the movable frame 60 can also adopt a bearing seat.

[0067] Furthermore, in another embodiment, the adjusting power 61 may be a pneumatic cylinder, which is in transmission connection with the movable frame 60 so as to be driven by the pneumatic cylinder to vertically raise and lower the movable frame 60. In this case, in a more perfect embodiment, a travel switch is further provided, and a controller is connected to the travel switch and the adjusting power 61 so that the travel switch and the adjusting power 61 cooperate to control the height of the movable frame 60, thereby achieving the purpose of adjusting the gap between the toothed pressure roller 32 and the support plate 31.

[0068] In practice, when the toothed pressure roller 32 is equipped with an independent fifth motor, the fifth motor can be mounted on the movable frame 60 of the vertical adjustment mechanism 6, so that the fifth motor can be raised and lowered synchronously with the movable frame 60 and the toothed pressure roller 32, ensuring stable transmission between the fifth motor and the toothed pressure roller 32. When the power source of the toothed pressure roller 32 is internally configured (for example, when the roller of the toothed pressure roller 32 is a motorized roller), the toothed pressure roller 32 can be connected to the movable frame 60 via the bearing 53.

[0069] Example 3

[0070] The main difference between this embodiment 3 and the above embodiment 2 is that in the impregnation and swelling system provided in this embodiment, the guide roller 12 is arranged above the impregnation container 11 in a liftable manner, so that the gap between the guide roller 12 and the impregnation container 11 is adjustable. Figure 7 and Figure 8 As shown, the installation height of the guide roller 12 can be adjusted according to factors such as the thickness of the pulp sheet below the liquid surface, so that the installation height of the guide roller 12 is adapted to the thickness of the pulp sheet after expansion, so as to reserve an adaptive space between the guide roller 12 and the impregnation container 11. This not only ensures that the expanded pulp sheet can move smoothly along the predetermined space without problems such as arching and clogging, but also effectively controls the depth of the puncture hole, thereby achieving a more sufficient and uniform impregnation effect.

[0071] During implementation, the first impregnation module 1 further configures the guide roller 12 with the vertical adjustment mechanism 6, such as Figure 7 and Figure 8 As shown, the guide roller 12 can be raised and lowered by the vertical adjustment mechanism 6 to adjust the gap between the guide roller 12 and the impregnation container 11. In practice, the two ends of the guide roller 12 are respectively provided with the vertical adjustment mechanism 6, as shown in FIG. Figure 7 and Figure 8 As shown, both ends of the guide roller 12 are connected to a movable frame 60 in the vertical adjustment mechanism 6. Adjustment power 61 can be used to drive the movable frame 60 vertically upward and downward. The vertical movement of the movable frame 60 drives the guide roller 12 vertically upward and downward, thereby adjusting the gap between the guide roller 12 and the impregnation container 11. In practice, the vertical adjustment mechanism 6 can be implemented using the structure described above, which will not be further described here. The guide roller 12 can be connected to the mounting hole 601 of the movable frame 60 via a bearing 53.

[0072] During implementation, when the guide roller 12 is equipped with an independent first motor, the first motor can be installed on the movable frame 60 of the vertical adjustment mechanism 6, so that the first motor can be raised and lowered synchronously with the movable frame 60 and the guide roller 12, ensuring stable transmission of the first motor and the guide roller 12.

[0073] Example 4

[0074] In order to further solve the problem of promoting sufficient contact between the solvent and the fiber, the main difference between the present embodiment 4 and the above-mentioned embodiment 2 is that in the impregnation and swelling system provided by the present embodiment, the pressure roller 25 in the liquid squeezing assembly 24 can be raised and lowered above the conveying mechanism, so that the distance between the pressure roller 25 and the roller 26 (or the conveyor belt 23) can be adjusted. Figure 9 and Figure 10 As shown, on the one hand, the squeezing force of the squeezing assembly 24 on the pulp sheet can be effectively adjusted to meet the impregnation and swelling requirements of different occasions. On the other hand, the pressing roller 25 can more accurately squeeze the impregnated and expanded pulp sheet, increasing the penetration effect of the solvent in the pulp sheet, further promoting full contact between the solvent and the fibers, avoiding the existence of unimpregnated fibers (white cores), and making production control simple and reliable.

[0075] During implementation, the second impregnation module 2 is further provided with the vertical adjustment mechanism 6 for the pressure roller 25 in the liquid squeezing assembly 24, so that the pressure roller 25 can be raised and lowered by the vertical adjustment mechanism 6 to adjust the gap between the pressure roller 25 and the conveying mechanism. During implementation, the vertical adjustment mechanism 6 is provided at both ends of the pressure roller 25. Figure 9 and Figure 10 As shown, both ends of the pressure roller 25 are connected to a movable frame 60 in the vertical adjustment mechanism 6. Adjustment power 61 can be used to drive the movable frame 60 to vertically raise and lower the pressure roller 25. The vertical raising and lowering of the movable frame 60 also drives the pressure roller 25 to vertically raise and lower the pressure roller 25, effectively adjusting the distance between the pressure roller 25 and the conveyor mechanism. In practice, the vertical adjustment mechanism 6 can be implemented using the structure described above, which will not be further described here. The pressure roller 25 can be connected to the assembly hole 601 of the movable frame 60 via a bearing 53.

[0076] During implementation, when the extrusion assembly 24 in the second impregnation module 2 is equipped with an independent fourth motor, the fourth motor can be installed on the movable frame 60 of the vertical adjustment mechanism 6, so that the fourth motor can be raised and lowered synchronously with the movable frame 60 and the pressure roller 25, ensuring stable transmission of the fourth motor and the pressure roller 25.

[0077] Example 5

[0078] The main difference between this embodiment 5 and the above embodiment 2 is that in the impregnation and swelling system provided by this embodiment, the rotating roller 14 in the first impregnation module 1 is arranged above the impregnation container 11 in a liftable manner. Figure 11 As shown, the distance between the roller 14 and the impregnation container 11 is adjustable, which can reserve an adaptive space between the roller 14 and the impregnation container 11 to ensure that the pulp plate moves smoothly along the predetermined space, and can achieve the required extrusion force and extrusion effect, thereby facilitating a more sufficient and uniform impregnation effect.

[0079] During implementation, the first impregnation module 1 further configures the roller 14 with the vertical adjustment mechanism 6, as shown in FIG. Figure 11 As shown, the roller 14 can be raised and lowered by the vertical adjustment mechanism 6 to adjust the distance between the roller 14 and the impregnation container 11. In practice, the vertical adjustment mechanism 6 is provided at both ends of the roller 14. Figure 11 As shown, both ends of the roller 14 are connected to a movable frame 60 in the vertical adjustment mechanism 6. Adjustment power 61 is used to drive the movable frame 60 vertically upward and downward, and the vertical movement of the movable frame 60 drives the roller 14 vertically upward and downward, effectively adjusting the distance between the roller 14 and the dipping container 11. In practice, the vertical adjustment mechanism 6 can be implemented using the structure described above and will not be further described here. The roller 14 is connected to the mounting hole 601 of the movable frame 60 via the bearing 53.

[0080] During implementation, when the roller 14 in the first impregnation module 1 is equipped with an independent second motor, the second motor can be installed on the movable frame 60 of the vertical adjustment mechanism 6, so that the second motor can be raised and lowered synchronously with the movable frame 60 and the roller 14, ensuring stable transmission of the second motor and the roller 14.

[0081] The above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An impregnation swelling system, characterized in that: The invention comprises a first impregnation module, a second impregnation module, a control module and a pulp porridge module, wherein the first impregnation module comprises an impregnation container and a guide roller, wherein the guide roller is provided with a needle for inserting a pulp plate in the circumferential direction, the impregnation container is used to contain the solvent, and the guide roller is rotatably installed above or inside the impregnation container, and the guide roller is used to drive the pulp plate to move forward along the impregnation container; The second impregnation module includes a conveying mechanism, a plurality of squeezing assemblies, and a plurality of spraying mechanisms disposed downstream of the impregnation container. The conveying mechanism is used to receive the upstream pulp sheet and drive the pulp sheet forward. The squeezing assemblies are arranged at intervals along the conveying direction of the conveying mechanism. The squeezing assemblies are used to squeeze out part of the solvent in the pulp sheet. The spraying mechanism is provided between at least two adjacent squeezing assemblies. The spraying mechanism is used to spray the solvent onto the pulp sheet. The control module includes a support plate arranged downstream of the conveying mechanism and a toothed pressing roller arranged above the support plate, the support plate is used to support the pulp sheet, and there is a gap between the toothed pressing roller and the support plate for the pulp sheet to pass through, and the toothed pressing roller is used to squeeze out excess solvent in the pulp sheet to adjust the mass ratio of solvent to fiber in the pulp sheet; The pulp porridge module includes a first crushing device arranged downstream of the regulating module, and the first crushing device is used for crushing the pulp plate into pulp porridge.

2. The impregnation swelling system according to claim 1, characterized in that The first impregnation module also includes a plurality of rollers, which are rotatably installed above or inside the impregnation container. A gap is formed between the rollers and the impregnation container for the pulp plate to pass through. The rollers and guide rollers are arranged alternately. The rollers are used to prevent the pulp plate from arching and deforming when moving forward.

3. The impregnation swelling system according to claim 1, characterized in that The conveying mechanism includes an active roller, a driven roller and a conveyor belt tensioned on the active roller and the driven roller; the liquid squeezing assembly includes a pressure roller and an idler roller, the idler roller is arranged on the inner side of the conveyor belt, the pressure roller is arranged above the conveying mechanism and corresponds to the idler roller, and there is a gap between the pressure roller and the upper surface of the conveyor belt for the pulp sheet to pass through, and the pulp sheet is squeezed by the cooperation of the pressure roller and the idler roller.

4. The impregnation swelling system according to claim 3, characterized in that The conveyor belt adopts a high-strength mesh belt with a temperature resistance exceeding 80°C; Alternatively, the spray mechanism uses a spray pipe with a nozzle or spray hole configured on its side. Each spray pipe is connected to a delivery pump through a pipeline, and the delivery pump is connected to a solvent collection tank for storing the solvent, and the solvent collection tank is provided with a filter.

5. The impregnation swelling system according to claim 1, characterized in that The toothed pressure roller has a plurality of toothed protrusions in the circumferential direction of the roller, and the side of each toothed protrusion facing away from the center of the roller is a blunt head structure; Alternatively, a plurality of toothed pressing rollers are arranged along the length direction of the support plate.

6. The impregnation swelling system according to claim 1, characterized in that The control module further includes a vertical adjustment mechanism, and the toothed pressure roller is lifted and lowered above the support plate by the vertical adjustment mechanism, so that the gap between the toothed pressure roller and the support plate is adjustable.

7. The impregnation swelling system according to claim 2, characterized in that: The first impregnation module further includes a vertical adjustment mechanism, and the guide roller is arranged above the impregnation container in a liftable manner through the vertical adjustment mechanism, so that the gap between the guide roller and the impregnation container is adjustable; And / or, the first impregnation module further includes a vertical adjustment mechanism, and the roller is arranged above the impregnation container in a liftable manner by the vertical adjustment mechanism, so that the gap between the roller and the impregnation container is adjustable; And / or, the second impregnation module further includes a vertical adjustment mechanism, and the pressure roller is arranged above the support roller in a liftable manner through the vertical adjustment mechanism, so that the gap between the pressure roller and the support roller is adjustable.

8. The impregnation swelling system according to claim 6 or 7, characterized in that: The vertical adjustment mechanism includes a movable frame, an adjusting power, and a guide structure, wherein the guide structure includes a guide part and a sliding part that adapt to each other, the guide part is arranged in the vertical direction and is set on the supporting frame, the sliding part is movably constrained to the guide part, and the movable frame is connected to the sliding part; the adjusting power is transmission-connected to the movable frame for driving the movable frame to vertically lift and lower, and the movable frame is constructed with an assembly hole.

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