Paper dyeing production system and paper dyeing method

Abstract

The invention discloses a paper dyeing production system and a paper dyeing method. The paper dyeing production system comprises a paper feeding device; the dyeing and drying assembly comprises a dyeing device and a first drying device, the dyeing device comprises a first compression roller and a second compression roller, a first slurry storage tank is formed between the upper side of the first compression roller and the first paper surface of the paper, and a second slurry storage tank is formed between the upper side of the second compression roller and the second paper surface of the paper; and a paper delivery device. Paper needing to be dyed enters the dyeing device to be dyed, when the color of the paper needs to be switched, only the dyeing device and a small number of other structures need to be cleaned, and compared with cleaning of papermaking equipment, the paper dyeing production system is short in cleaning downtime, the water consumption and the wastewater treatment capacity are greatly reduced, and the cost is reduced. Therefore, paper of different colors can be quickly switched and produced, the switching cost is low, and production of small-batch paper of different colors can be met.

Description

Technical Field

[0001] The invention relates to the technical field of paper production, and in particular to a paper dyeing production system and a paper dyeing method. Background Art

[0002] The traditional production of colored paper is carried out during the papermaking process. The dye of the required color is added to the pulp and mixed in the papermaking equipment to produce paper products of the corresponding color. This method of producing colored paper has at least the following shortcomings: during production, the dye will dye multiple devices in the papermaking equipment. If you need to produce paper of another color, you need to stop production and clean the entire papermaking equipment, which greatly reduces production efficiency. In addition, a large amount of water is required for cleaning, and the wastewater after cleaning needs to be treated to meet environmental protection requirements, and the cleaning cost is high. Therefore, the current method of manufacturing colored paper is mostly suitable for mass production of paper of the same color. When it is necessary to switch to produce paper of different colors, the switching cost is high, which is not conducive to meeting customers' small-scale and differentiated needs. Summary of the invention

[0003] The main purpose of the present invention is to provide a paper dyeing production system and a paper dyeing method, aiming to solve the technical problem of high switching cost when switching colors in the method of manufacturing colored paper in the prior art.

[0004] To achieve the above object, the present invention provides a paper dyeing production system, comprising:

[0005] A paper feeding device, which is used to continuously feed the paper forward;

[0006] A dyeing and drying component is arranged at the front side of the paper feeding device, the dyeing and drying component includes a dyeing device and a first drying device, the first drying device is arranged at the front side of the dyeing device, the dyeing device includes a first dyeing frame, the first dyeing frame is provided with a first pressing roller and a second pressing roller parallel to each other, the axes of the first pressing roller and the second pressing roller are extended in the left-right direction, the first pressing roller and the second pressing roller are arranged front and back and close to each other, the first pressing roller and the second pressing roller can pass through the paper from top to bottom and press the paper, a first pulp storage tank is formed between the upper side of the first pressing roller and the first paper surface of the paper, a second pulp storage tank is formed between the upper side of the second pressing roller and the second paper surface of the paper, the first pulp storage tank can store a first dye pulp to dye the first paper surface, the The second pulp storage tank is capable of storing a second dyeing slurry to dye the second paper surface, the dyeing device further comprises two first end sealing plates and two second end sealing plates, the two first end sealing plates are respectively arranged at the left and right ends of the first pulp storage tank, the two second end sealing plates are respectively arranged at the left and right ends of the second pulp storage tank, the first end sealing plate is used to block the first dyeing slurry at the left and right ends of the first pulp storage tank, the second end sealing plate is used to block the second dyeing slurry at the left and right ends of the second pulp storage tank, the dyeing device further comprises a first pulp feeding pipe and a second pulp feeding pipe, the first pulp feeding pipe is provided with a first pulp feeding port for adding the first dyeing slurry to the first pulp storage tank, the second pulp feeding pipe is provided with a second pulp feeding port for adding the second dyeing slurry to the second pulp storage tank, and the first drying device is used to dry the dyed paper;

[0007] A paper discharging device is arranged at the front side of the dyeing and drying component, and is used for delivering the dyed paper.

[0008] The paper to be dyed enters from the paper feeding device and is transported forward to the dyeing and drying component; the dyeing device includes two first pressing rollers and a second pressing roller, and the paper passes through the first pressing roller and the second pressing roller; the upper side of the first pressing roller and the first paper surface of the paper form a first pulp storage tank, and the first pulp feeding port of the first pulp feeding pipe can add the first dye pulp into the first pulp storage tank, and the two first end sealing plates block the first dye pulp at the left and right ends of the first pulp storage tank, so that the first dye pulp can be stored in the first pulp storage tank to a certain depth; the upper side of the second pressing roller and the second paper surface of the paper form a second pulp storage tank, and the first end sealing plates of the first pulp feeding pipe can ... The second slurry delivery port of the second slurry delivery pipe can add the second dye slurry into the second slurry storage tank, and the two second end sealing plates block the second dye slurry at the left and right ends of the second slurry storage tank, so that the second dye slurry can be stored in the second slurry storage tank to a certain depth; in the process of conveying paper, the first dye slurry and the second dye slurry can be attached to the first paper surface and the second paper surface of the paper respectively for dyeing, and the dye slurry is made flatter on the paper surface under the relative pressure of the first pressing roller and the second pressing roller; then the dyed paper enters the first drying device to dry the dye; finally, the paper is sent out from the paper discharge device to complete the dyeing.

[0009] The paper dyeing production system separates dyeing from the existing method of manufacturing colored paper. The paper to be dyed enters the dyeing device for dyeing. When the color of the paper needs to be switched, only the dyeing device and a small amount of other structures need to be cleaned. Compared with the existing papermaking equipment for cleaning, the paper dyeing production system has a short cleaning downtime, and the water consumption and wastewater treatment volume are greatly reduced, thereby achieving rapid switching to produce papers of different colors with low switching costs, which can meet the production of small batches of papers of different colors. In addition, the colors of the first dye pulp and the second dye pulp can be the same or different, and the first dye pulp and the second dye pulp can be both added or one of them can be added to achieve dyeing of paper with a variety of different effects.

[0010] Preferably, the paper dyeing production system also includes a surface treatment drying component, which is arranged between the dyeing and drying component and the paper output device, and the surface treatment drying component includes a surface treatment device and a second drying device, and the second drying device is arranged on the front side of the surface treatment device. The surface treatment device is used to apply a surface treatment agent to the surface of the dyed paper, and the second drying device is used to dry the paper after the surface treatment agent is applied.

[0011] The dyed paper enters the surface treatment drying component, and the surface treatment device applies a surface treatment agent to the surface of the dyed paper, which can protect the surface of the dyed paper. Then the paper enters the second drying device to dry the surface treatment agent.

[0012] Preferably, the surface treatment device includes a surface treatment frame, on which a third pressure roller and a fourth pressure roller parallel to each other are provided, the axes of the third pressure roller and the fourth pressure roller both extend in the left-right direction, the third pressure roller and the fourth pressure roller are arranged front to back and close to each other, the third pressure roller and the fourth pressure roller can pass through the paper from top to bottom and press the paper, a third pulp storage tank is formed between the upper side of the third pressure roller and the first paper surface of the paper, a fourth pulp storage tank is formed between the upper side of the fourth pressure roller and the second paper surface of the paper, the third pulp storage tank can store a surface treatment agent to apply the surface treatment agent to the first paper surface, and the fourth pulp storage tank can store a surface treatment agent to apply the surface treatment agent to the second paper surface.

[0013] The upper side of the third pressing roller and the first paper surface of the paper form a third pulp storage tank, and the upper side of the fourth pressing roller and the second paper surface of the paper form a fourth pulp storage tank. The surface treatment agent is added into the third pulp storage tank and the fourth pulp storage tank. During the transportation of the paper, the surface treatment agent can be attached to the first paper surface and the second paper surface of the paper, and the surface treatment agent is made flatter on the paper surface under the relative pressure of the third pressing roller and the fourth pressing roller.

[0014] Preferably, the first drying device comprises a first drying rack, a plurality of first drying cylinders are arranged on the first drying rack, the plurality of first drying cylinders are arranged in an up-and-down staggered manner from back to front, a first drying net is further provided on the first drying rack, the first drying net is wound around the plurality of first drying cylinders, paper can pass through between the plurality of first drying cylinders and dry the paper, and the first drying net is used to press the paper onto the first drying cylinders;

[0015] The dyeing and drying assembly also includes a pre-drying device, which is arranged between the dyeing device and the first drying device. The pre-drying device is provided with a pre-drying chamber, and the pre-drying chamber is used for the paper to pass through and be pre-dried before entering the first drying device.

[0016] The structure of multiple first drying cylinders can improve the drying efficiency and reduce the space occupied by the first drying device. After the paper is dyed, due to the high humidity, if it passes directly through the first drying cylinder and the first drying net, it is easy to leave marks of the first drying net on the paper, resulting in an uneven surface of the paper. Therefore, the paper first passes through the pre-drying chamber of the pre-drying device. The pre-drying chamber pre-dries the paper to reduce moisture without affecting the flatness of the paper surface, so that the paper does not leave or leaves fewer marks when it passes through the first drying cylinder and the first drying net.

[0017] Preferably, the dyeing device also includes two first material receiving troughs, which are respectively arranged on the lower side of the outer sides of the two first end sealing plates and the two second end sealing plates, and the first material receiving troughs are used to receive the first dye slurry overflowing from the upper side of the first end sealing plate in the first slurry storage tank and to receive the second dye slurry overflowing from the upper side of the second end sealing plate in the second slurry storage tank.

[0018] The first dyeing slurry and the second dyeing slurry are continuously added into the first slurry storage tank and the second slurry storage tank, and the liquid level of the first dyeing slurry reaches the height of overflowing the first end sealing plate, and the liquid level of the second dyeing slurry reaches the height of overflowing the second end sealing plate. The first dyeing slurry overflows from the upper side of the first end sealing plate and is received by the first material receiving trough, and the second dyeing slurry overflows from the upper side of the second end sealing plate and is received by the first material receiving trough. In this way, the liquid level of the first dyeing slurry in the first slurry storage tank is kept basically unchanged, and the liquid level of the second dyeing slurry in the second slurry storage tank is kept basically unchanged, so that the time for the paper to pass through the dyeing slurry and the dyeing effect remain basically the same, thereby improving the color consistency.

[0019] In another aspect, the present invention further provides a paper dyeing method using the above paper dyeing production system, the paper dyeing method comprising the following steps:

[0020] S1: putting the paper roll to be dyed into the paper feeding device, leading the paper through between the first pressing roller and the second pressing roller, the first pressing roller and the second pressing roller pressing the paper, so that the first pulp storage tank is formed between the first paper surface of the paper and the upper side of the first pressing roller, and the second pulp storage tank is formed between the second paper surface of the paper and the upper side of the second pressing roller;

[0021] S2: the first slurry delivery port continuously adds the first dye slurry to the first slurry storage tank, so that the first slurry is stored in the first slurry storage tank, and the first slurry exceeding the height of the first end sealing plate overflows from the upper side of the first end sealing plate to maintain the liquid level of the first slurry in the first slurry storage tank;

[0022] And / or, the second slurry delivery port continuously adds the second slurry to the second slurry storage tank, so that the first slurry storage tank is filled with the second slurry, and the second slurry exceeding the height of the second end sealing plate overflows from the upper side of the second end sealing plate to maintain the liquid level of the second slurry in the second slurry storage tank;

[0023] S3: rotating the first pressing roller and the second pressing roller to pull the paper to be transported from top to bottom, so that the first paper surface of the paper is immersed in the first dyeing slurry for dyeing, and the second paper surface of the paper is immersed in the second dyeing slurry for dyeing;

[0024] S4: The dyed paper is transported to the first drying device for drying;

[0025] S5: The dried paper is transported to the paper discharging device for delivery.

[0026] By using the paper dyeing method, the first dyeing pulp in the first pulp storage tank can dye the first paper surface of the paper, and the second dyeing pulp in the second pulp storage tank can dye the second paper surface of the paper.

[0027] Preferably, in step S2, the first slurry feeding port and the second slurry feeding port respectively add a first dye slurry to the first slurry storage tank and add a second dye slurry to the second slurry storage tank, the first dye slurry and the second dye slurry have the same color, and the depth of the first dye slurry in the first slurry storage tank is different from the depth of the second dye slurry in the second slurry storage tank.

[0028] When the colors of the first dye pulp and the second dye pulp are the same, and the depth of the first dye pulp in the first pulp storage tank is different from the depth of the second dye pulp in the second pulp storage tank, the paper is immersed in the first dye pulp and the second dye pulp for different times, so that the first paper surface and the second paper surface can achieve a dyeing effect with different color depths.

[0029] Preferably, in step S2, the first slurry feeding port and the second slurry feeding port add a first dye slurry to the first slurry storage tank and add a second dye slurry to the second slurry storage tank respectively, and the first dye slurry and the second dye slurry have different colors.

[0030] When the colors of the first dye paste and the second dye paste are different, a dyeing effect of different colors of the first paper surface and the second paper surface can be achieved.

[0031] Preferably, the edge of the paper is close to the corresponding first end sealing plate and the second end sealing plate, so as to separate the first dye paste and the second dye paste at the edge of the paper;

[0032] The first slurry delivery port is located above the first slurry storage tank, and the second slurry delivery port is located above the second slurry storage tank;

[0033] After step S5, the edge of the paper is cut off.

[0034] The edge of the paper is arranged close to the first end seal plate and the second end seal plate, which can reduce the distance between the edge of the paper and the first end seal plate and the second end seal plate, so that the paper conveying is not affected, and the first dyeing slurry and the second dyeing slurry can be separated as much as possible, reducing the first dyeing slurry and the second dyeing slurry from flowing from the edge of the paper and the gap between the first end seal plate and the second end seal plate, affecting the color of the other paper surface. The first slurry delivery port is located above the first slurry storage tank, and the second slurry delivery port is located above the second slurry storage tank. Combined with the first dyeing slurry and the second dyeing slurry overflowing from the left and right sides, the newly added first dyeing slurry and the second dyeing slurry will flow to the left and right sides, even if the first dyeing slurry and the second dyeing slurry are mixed in the edge gap of the paper, they will remain on both sides instead of flowing to the middle, so as not to affect the color of the middle area of ​​the paper. In addition, after the dyeing is completed, the edge of the paper will be cut off, so that even if the first dyeing slurry and the second dyeing slurry are mixed at the edge of the paper and dye the edge of the paper, after the edge of the paper is cut off, the retained paper can achieve the desired different color effects of the first paper surface and the second paper surface.

[0035] Preferably, the first dye paste and the second dye paste overflowing from the upper side of the first end sealing plate and the upper side of the second end sealing plate are collected, and the collected first dye paste and the second dye paste are adjusted to other colors before being used for dyeing.

[0036] The first dye slurry and the second dye slurry of different colors must be continuously added and overflowed during the dyeing process to maintain the dyeing effect of the first paper surface and the second paper surface, and the usage amount is large; therefore, the first dye slurry and the second dye slurry are collected after overflowing, and then can be adjusted to other required colors, and then used for dyeing other color papers, thereby realizing the reuse of dye slurries and reducing material waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0038] Figure 1 It is a structural schematic diagram of the paper dyeing production system of the present invention;

[0039] Figure 2 It is a structural schematic diagram of the dyeing device of the present invention;

[0040] Figure 3 It is a schematic structural diagram of the dyeing device, the pre-drying device and the first drying device of the present invention.

[0041] In the accompanying drawings: 1-paper feeding device, 2-dyeing device, 21-first dyeing frame, 22-first pressing roller, 221-first pulp storage tank, 23-second pressing roller, 231-second pulp storage tank, 241-first end sealing plate, 242-second end sealing plate, 25-first material receiving trough, 26-first pulp feeding pipe, 261-first pulp feeding port, 27-second pulp feeding pipe, 271-second pulp feeding port, 28-first movable frame, 281-opening and closing drive unit, 3-first drying device, 32-first drying cylinder, 33-first dryer net, 4-surface treatment device, 5-second drying device, 6-paper discharging device, 7-pre-drying device, 71-pre-drying chamber, 8-paper.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications, such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] like Figures 1 to 3 As shown, a paper dyeing production system includes a paper feeding device 1, a dyeing and drying component, a surface treatment and drying component and a paper discharging device 6.

[0047] The paper feed device 1 is used for continuously conveying the paper 8 forward. The paper feed device 1 can adopt the existing paper feed device 1, and the paper 8 to be dyed is placed in the paper feed device 1 in a roll, and the paper 8 can be continuously conveyed forward for production by pulling out the paper roll.

[0048] The dyeing and drying assembly is arranged at the front side of the paper feeding device 1, and the dyeing and drying assembly includes a dyeing device 2 and a first drying device 3. The first drying device 3 is arranged at the front side of the dyeing device 2. The dyeing device 2 includes a first dyeing frame 21. Figure 2The first dyeing frame 21 is provided with a first pressing roller 22 and a second pressing roller 23 which are parallel to each other. The axes of the first pressing roller 22 and the second pressing roller 23 extend in the left-right direction. The first pressing roller 22 and the second pressing roller 23 are arranged front to back and close to each other. The first pressing roller 22 and the second pressing roller 23 can pass through the paper 8 from top to bottom and press the paper 8. A first pulp storage tank 221 is formed between the upper side of the first pressing roller 22 and the first paper surface of the paper 8, and a second pulp storage tank 231 is formed between the upper side of the second pressing roller 23 and the second paper surface of the paper 8. The first pulp storage tank 221 can store the first dye pulp to dye the first paper surface, and the second pulp storage tank 231 can store the second dye pulp to dye the second paper surface. The dyeing device 2 also includes two first end sealing plates 241 and two The first end sealing plate 242 is provided, the two first end sealing plates 241 are respectively provided at the left and right ends of the first pulp storage tank 221, the two second end sealing plates 242 are respectively provided at the left and right ends of the second pulp storage tank 231, the first end sealing plate 241 is used to block the first dyeing pulp at the left and right ends of the first pulp storage tank 221, the second end sealing plate 242 is used to block the second dyeing pulp at the left and right ends of the second pulp storage tank 231, the dyeing device 2 also includes a first pulp feeding pipe 26 and a second pulp feeding pipe 27, the first pulp feeding pipe 26 is provided with a first pulp feeding port 261 for adding the first dyeing pulp to the first pulp storage tank 221, the second pulp feeding pipe 27 is provided with a second pulp feeding port 271 for adding the second dyeing pulp to the second pulp storage tank 231, and the first drying device 3 is used to dry the dyed paper 8. The first dyeing frame 21 is provided with two first driving motors, and the two first driving motors can respectively drive the first pressing roller 22 and the second pressing roller 23 to rotate towards each other, so as to press the paper 8 and pull it forward. The surface of at least one of the first pressing roller 22 and the second pressing roller 23 is provided with elastic material, so that the first pressing roller 22 and the second pressing roller 23 can better clamp the paper 8. The first end sealing plate 241 and the second end sealing plate 242 on the same side can be separately arranged or integrally arranged.

[0049] The paper discharging device 6 is arranged at the front side of the dyeing and drying assembly, and is used to deliver the dyed paper 8. The paper discharging device 6 can be an existing paper discharging device 6, and the dyed paper 8 can be discharged and rolled into a paper roll, or sent to other equipment for cutting and other processing.

[0050] The paper 8 to be dyed enters from the paper feeding device 1 and is transported forward to the dyeing and drying component; the dyeing device 2 includes two first pressing rollers 22 and a second pressing roller 23, and the paper 8 passes between the first pressing roller 22 and the second pressing roller 23; the upper side of the first pressing roller 22 and the first paper surface of the paper 8 form a first pulp storage tank 221, and the first pulp delivery port 261 of the first pulp delivery pipe 26 can add the first dye pulp into the first pulp storage tank 221. The two first end sealing plates 241 block the first dye pulp at the left and right ends of the first pulp storage tank 221, so that the first dye pulp can be stored in the first pulp storage tank 221 to a certain depth; the upper side of the second pressing roller 23 and the second paper surface of the paper 8 form a second pulp storage tank 221. 31, the second slurry delivery port 271 of the second slurry delivery pipe 27 can add the second dye slurry into the second slurry storage tank 231, and the two second end sealing plates 242 block the second dye slurry at the left and right ends of the second slurry storage tank 231, so that the second dye slurry can be stored in the second slurry storage tank 231 to a certain depth, and the dyeing is more stable; during the transportation process of the paper 8, the first dye slurry and the second dye slurry can be attached to the first paper surface and the second paper surface of the paper 8 respectively for dyeing, and the dye slurry on the paper surface is made flatter under the relative pressure of the first pressing roller 22 and the second pressing roller 23; then the dyed paper 8 enters the first drying device 3 to dry the dye; finally, the paper 8 is sent out from the paper discharge device 6 to complete the dyeing.

[0051] The paper dyeing production system separates dyeing from the existing method of manufacturing colored paper 8. The paper 8 that needs to be dyed enters the dyeing device 2 for dyeing. When the color of the paper 8 needs to be switched, only the dyeing device 2 and a small amount of other structures need to be cleaned. Compared with the existing cleaning papermaking equipment, the paper dyeing production system has a short cleaning downtime, and the water consumption and wastewater treatment volume are greatly reduced, thereby achieving rapid switching to produce papers 8 of different colors. The switching cost is low, and the production of small batches of papers 8 of different colors can be met. In addition, the colors of the first dye pulp and the second dye pulp can be the same or different, and the first dye pulp and the second dye pulp can be both added or one of them can be added to achieve dyeing of paper 8 with a variety of different effects.

[0052] In some specific embodiments, the paper dyeing production system further includes a surface treatment drying component, which is disposed between the dyeing drying component and the paper discharging device 6. The surface treatment drying component includes a surface treatment device 4 and a second drying device 5, which is disposed at the front side of the surface treatment device 4. The surface treatment device 4 is used to apply a surface treatment agent to the surface of the dyed paper 8, and the second drying device 5 is used to dry the paper 8 after the surface treatment agent is applied. The surface treatment agent can be an existing water-repellent agent, which can increase the water resistance of the surface of the paper 8 after dyeing, or an existing surface treatment agent that can enhance the surface strength of the paper 8 or improve the glossiness, etc., and can be selected according to actual needs.

[0053] The dyed paper 8 enters the surface treatment drying assembly, and the surface treatment device 4 applies a surface treatment agent to the surface of the dyed paper 8, and the surface treatment agent can protect the surface of the dyed paper 8, and then the paper 8 enters the second drying device 5 to dry the surface treatment agent. The structure of the second drying device 5 can be the same as that of the first drying device 3, and can adopt cylinder contact drying, non-contact pre-drying + cylinder contact drying, or only non-contact drying.

[0054] Furthermore, the surface treatment device 4 includes a surface treatment frame, on which a third pressure roller and a fourth pressure roller parallel to each other are provided, the axes of the third pressure roller and the fourth pressure roller both extend in the left-right direction, the third pressure roller and the fourth pressure roller are arranged front to back and close to each other, the third pressure roller and the fourth pressure roller can pass through the paper 8 from top to bottom and press the paper 8, a third pulp storage tank is formed between the upper side of the third pressure roller and the first paper surface of the paper 8, a fourth pulp storage tank is formed between the upper side of the fourth pressure roller and the second paper surface of the paper 8, the third pulp storage tank can store a surface treatment agent to apply the surface treatment agent to the first paper surface, and the fourth pulp storage tank can store a surface treatment agent to apply the surface treatment agent to the second paper surface.

[0055] The upper side of the third pressing roller and the first paper surface of the paper 8 form a third pulp storage tank, and the upper side of the fourth pressing roller and the second paper surface of the paper 8 form a fourth pulp storage tank. The surface treatment agent is added to the third pulp storage tank and the fourth pulp storage tank. During the transportation of the paper 8, the surface treatment agent can be attached to the first paper surface and the second paper surface of the paper 8, and the surface treatment agent is made flatter on the paper surface under the pressure of the third pressing roller and the fourth pressing roller. The structure and principle of the surface treatment device 4 in this embodiment are basically the same as the structure and principle of the dyeing device 2. In other embodiments, the surface treatment device 4 can also apply the surface treatment agent to the surface of the paper 8 by spraying or other methods.

[0056] In some specific embodiments, the number of dyeing and drying components is one group; or the number of dyeing and drying components is two or more groups, and the surface treatment drying component is arranged in front of the frontmost dyeing and drying component. Two or more groups of dyeing and drying components can dye the paper 8 multiple times, so that the color of the paper 8 is closer to the target color.

[0057] In some specific embodiments, referring to Figure 3 The first drying device 3 includes a first drying frame, on which a plurality of first drying cylinders 32 are arranged in an up-and-down staggered manner from back to front, and a first drying net 33 is also provided on the first drying frame, the first drying net 33 is wound around the plurality of first drying cylinders 32, between which the plurality of first drying cylinders 32 can pass the paper 8 and dry the paper 8, and the first drying net 33 is used to press the paper 8 onto the first drying cylinders 32;

[0058] The dyeing and drying assembly also includes a pre-drying device 7, which is arranged between the dyeing device 2 and the first drying device 3. The pre-drying device 7 is provided with a pre-drying chamber 71, which is used for the paper 8 to pass through and be pre-dried before entering the first drying device 3.

[0059] The structure of multiple first drying cylinders 32 can improve the drying efficiency and reduce the space occupied by the first drying device 3. The structure of the first drying cylinder 32 and the first drying net 33 is the existing structure. A heating source such as a heating wire or steam is arranged in the first drying cylinder 32 to heat the first drying cylinder 32. The paper 8 is attached to the first drying cylinder 32 to achieve drying. The multiple first drying cylinders 32 are arranged in an alternating manner up and down, which can reduce the space occupied by the site.

[0060] After the paper 8 is dyed, due to the high humidity, if it directly passes through the first drying cylinder 32 and the first drying net 33, it is easy to leave marks of the first drying net 33 on the paper 8, resulting in an uneven surface of the paper 8. Therefore, the paper 8 first passes through the pre-drying chamber 71 of the pre-drying device 7. The pre-drying chamber 71 pre-dries the paper 8 to reduce moisture without affecting the flatness of the surface of the paper 8, so that the paper 8 does not leave or leaves fewer marks when it passes through the first drying cylinder 32 and the first drying net 33.

[0061] Furthermore, the pre-drying device 7 is an electric heating wire, gas or infrared heating furnace. The electric heating wire, gas or infrared heating furnace structure heats the pre-drying chamber 71, and the paper 8 is dried after passing through the pre-drying chamber 71.

[0062] In other embodiments, the first drying device 3 is provided with a drying chamber, and the drying chamber is used for passing and drying the paper soaked in the dye slurry. The first drying device 3 is an electric heating wire, a gas or an infrared heating furnace, and the electric heating wire, the gas or the infrared heating furnace structure heats the drying chamber, and the paper soaked in the dye slurry directly enters the drying chamber for drying, and the paper passes through the drying chamber to achieve non-contact drying, avoiding uneven printing on the paper surface caused by contact drying of the drying cylinder.

[0063] In some specific embodiments, the dyeing device 2 also includes two first material receiving troughs 25, which are respectively arranged on the lower side of the outer sides of the two first end sealing plates 241 and the two second end sealing plates 242, and the first material receiving troughs 25 are used to receive the first dye slurry overflowing from the upper side of the first end sealing plate 241 in the first slurry storage tank 221 and to receive the second dye slurry overflowing from the upper side of the second end sealing plate 242 in the second slurry storage tank 231.

[0064] The first dyeing slurry and the second dyeing slurry are continuously added to the first slurry storage tank 221 and the second slurry storage tank 231, and the liquid level of the first dyeing slurry reaches a height that overflows the first end sealing plate 241, and the liquid level of the second dyeing slurry reaches a height that overflows the second end sealing plate 242. The first dyeing slurry overflows from the upper side of the first end sealing plate 241 and is received by the first material receiving trough 25, and the second dyeing slurry overflows from the upper side of the second end sealing plate 242 and is received by the first material receiving trough 25. In this way, the liquid level of the first dyeing slurry in the first slurry storage tank 221 is kept basically unchanged, and the liquid level of the second dyeing slurry in the second slurry storage tank 231 is kept basically unchanged, so that the time for the paper 8 to pass through the dyeing slurry and the dyeing effect remain basically the same, thereby improving the color consistency.

[0065] In some specific embodiments, the first end sealing plate 241 and the second end sealing plate 242 are both fixed relatively to the first dyeing frame 21, the first end sealing plate 241 and the second end sealing plate 242 are arranged on the upper side between the first pressing roller 22 and the second pressing roller 23, the first pressing roller 22 is arranged on the rear side of the second pressing roller 23, the circumferential surface of the first pressing roller 22 abuts against the rear side of the first end sealing plate 241, the shape of the rear side surface of the first end sealing plate 241 is matched with the shape of the first pressing roller 22, the circumferential surface of the second pressing roller 23 abuts against the front side of the second end sealing plate 242, and the shape of the rear side surface of the second end sealing plate 242 is matched with the shape of the second pressing roller 23.

[0066] In some specific embodiments, the dyeing device 2 further includes a dye slurry storage body, which is used to store dye slurries. When the first dye slurry and the second dye slurry are of the same color, the first slurry delivery pipe 26 and the second slurry delivery pipe 27 can be connected to the same dye slurry storage body. The first slurry delivery pipe 26 and the second slurry delivery pipe 27 are both provided with a slurry delivery switch valve, which can control whether the first slurry delivery pipe 26 and the second slurry delivery pipe 27 deliver slurry.

[0067] In some specific embodiments, a first movable frame 28 is rotatably connected to the first dyeing frame 21, the second pressure roller 23 is arranged on the first dyeing frame 21, and the first pressure roller 22 is arranged on the first movable frame 28. An opening and closing drive unit 281 is connected between the first dyeing frame 21 and the first movable frame 28. The opening and closing drive unit 281 can drive the first movable frame 28 to rotate so that the first pressure roller 22 and the second pressure roller 23 are relatively close or relatively far away. The first dyeing frame 21 and the first movable frame 28 are both provided with first drive motors, and the two first drive motors are transmission-connected to the first pressure roller 22 and the second pressure roller 23 in a one-to-one correspondence.

[0068] Before production begins, the first pressing roller 22 and the second pressing roller 23 are separated, and after the paper 8 is placed between the first pressing roller 22 and the second pressing roller 23, the opening and closing driving unit 281 drives the first movable frame 28 to rotate, so that the first pressing roller 22 and the second pressing roller 23 are close to clamp the paper 8 and form the first pulp storage tank 221, which facilitates the feeding of the paper 8. The opening and closing driving unit 281 can be a rubber pneumatic tire, a cylinder or a hydraulic cylinder.

[0069] In some specific embodiments, the first slurry feeding port 261 faces the first slurry storage tank 221 or the side wall of the first pressing roller 22 close to the first slurry storage tank 221, and the second slurry feeding port 271 faces the second slurry storage tank 231 or the side wall of the second pressing roller 23 close to the first slurry storage tank 221. When the first slurry feeding port 261 faces the first pressing roller 22 and the second slurry feeding port 271 faces the second pressing roller 23, the first dyeing slurry first falls on the first pressing roller 22 and then flows into the first slurry storage tank 221, and the second dyeing slurry first falls on the second pressing roller 23 and then flows into the second slurry storage tank 231, so that the liquid levels in the first slurry storage tank 221 and the second slurry storage tank 231 are more stable and the dyeing is more uniform.

[0070] In another aspect of the present invention, a paper dyeing method using the above paper dyeing production system is provided, and the paper dyeing method comprises the following steps:

[0071] S1: Put the paper roll to be dyed into the paper feeding device 1, draw out the paper 8 through the first pressing roller 22 and the second pressing roller 23, the first pressing roller 22 and the second pressing roller 23 press the paper 8, so that a first pulp storage tank 221 is formed between the first paper surface of the paper 8 and the upper side of the first pressing roller 22, and a second pulp storage tank 231 is formed between the second paper surface of the paper 8 and the upper side of the second pressing roller 23;

[0072] S2: The first slurry delivery port 261 continuously adds the first dye slurry to the first slurry storage tank 221, so that the first dye slurry is stored in the first slurry storage tank 221, and the first dye slurry exceeding the height of the first end sealing plate 241 overflows from the upper side of the first end sealing plate 241 to maintain the liquid level of the first dye slurry in the first slurry storage tank 221;

[0073] And / or, the second slurry delivery port 271 continuously adds the second slurry to the second slurry storage tank 231, so that the second slurry is stored in the first slurry storage tank 221, and the second slurry exceeding the height of the second end sealing plate 242 overflows from the upper side of the second end sealing plate 242 to maintain the liquid level of the second slurry in the second slurry storage tank 231;

[0074] S3: rotating the first pressing roller 22 and the second pressing roller 23 to pull the paper 8 to be transported from top to bottom, the first paper surface of the paper 8 is immersed in the first dyeing slurry for dyeing, and the second paper surface of the paper 8 is immersed in the second dyeing slurry for dyeing;

[0075] S4: The dyed paper 8 is transported to the first drying device 3 for drying;

[0076] S5: The dried paper 8 is transported to the paper discharging device 6 for delivery.

[0077] By using the paper dyeing method, the first dye pulp in the first pulp storage tank 221 can dye the first paper surface of the paper 8 , and the second dye pulp in the second pulp storage tank 231 can dye the second paper surface of the paper 8 .

[0078] The present invention can achieve different dyeing effects:

[0079] Embodiment 1:

[0080] In step S2 , the first slurry delivery port 261 adds the first dye slurry to the first slurry storage tank 221 , or the second slurry delivery port 271 adds the second dye slurry to the second slurry storage tank 231 , so as to achieve a single-side dyeing effect on the paper 8 .

[0081] Embodiment 2:

[0082] In step S2, the first slurry delivery port 261 and the second slurry delivery port 271 respectively add the first dyeing slurry to the first slurry storage tank 221 and add the second dyeing slurry to the second slurry storage tank 231, the first dyeing slurry and the second dyeing slurry have the same color, and the depth of the first dyeing slurry in the first slurry storage tank 221 is different from the depth of the second dyeing slurry in the second slurry storage tank 231. The difference in depth can be adjusted by the height of the upper side of the first end sealing plate 241 and the second end sealing plate 242.

[0083] When the colors of the first dye paste and the second dye paste are the same, and the depth of the first dye paste in the first slurry storage tank 221 is different from the depth of the second dye paste in the second slurry storage tank 231, the paper 8 is immersed in the first dye paste and the second dye paste for different times, so that the first paper surface and the second paper surface can achieve a dyeing effect with different shades of color.

[0084] Embodiment three:

[0085] In step S2, the first slurry feeding port 261 and the second slurry feeding port 271 respectively add the first dye slurry to the first slurry storage tank 221 and add the second dye slurry to the second slurry storage tank 231, the first dye slurry and the second dye slurry have the same color, the depth of the first dye slurry in the first slurry storage tank 221 is the same as the depth of the second dye slurry in the second slurry storage tank 231, so that the double-sided dyeing effect of the paper 8 can be achieved, and the color depth of both sides is the same.

[0086] Embodiment 4:

[0087] In step S2, the first slurry delivery port 261 and the second slurry delivery port 271 add the first dyeing slurry to the first slurry storage tank 221 and add the second dyeing slurry to the second slurry storage tank 231 respectively, and the first dyeing slurry and the second dyeing slurry have different colors.

[0088] When the colors of the first dye paste and the second dye paste are different, a dyeing effect of different colors of the first paper surface and the second paper surface can be achieved.

[0089] Furthermore, the edge of the paper 8 is close to the corresponding first end sealing plate 241 and the second end sealing plate 242, so as to separate the first dye paste and the second dye paste at the edge of the paper 8;

[0090] The first slurry delivery port 261 is located above the first slurry storage tank 221, and the second slurry delivery port 271 is located above the second slurry storage tank 231;

[0091] After step S5 , the edge portion of the paper 8 is cut off.

[0092] The edge of the paper 8 is arranged close to the first end seal plate 241 and the second end seal plate 242, which can reduce the distance between the edge of the paper 8 and the first end seal plate 241 and the second end seal plate 242. Preferably, the distance between the edge of the paper 8 and the first end seal plate 241 and the second end seal plate 242 is 3-10 mm, which does not affect the conveyance of the paper 8, and can separate the first dyeing slurry and the second dyeing slurry as much as possible, reducing the first dyeing slurry and the second dyeing slurry from flowing through the gap between the edge of the paper 8 and the first end seal plate 241 and the second end seal plate 242 to affect the color of the other paper surface. The first slurry delivery port 261 is located above the first slurry storage tank 221, and the second slurry delivery port 271 is located above the second slurry storage tank 231. Combined with the first dyeing slurry and the second dyeing slurry overflowing from the left and right sides, the newly added first dyeing slurry and the second dyeing slurry will flow to the left and right sides. Even if the first dyeing slurry and the second dyeing slurry are mixed in the gap at the edge of the paper 8, they will remain on both sides instead of flowing to the middle, so as not to affect the color of the middle area of ​​the paper 8. In addition, after dyeing is completed, the edge portion of the paper 8 will be cut off. In this way, even if the first dye paste and the second dye paste are mixed at the edge of the paper 8 and dye the edge portion of the paper 8 with other colors, after the edge portion of the paper 8 is cut off, the remaining paper 8 can achieve the desired different color effects for the first paper surface and the second paper surface.

[0093] Furthermore, the first dye paste and the second dye paste overflowing from the upper side of the first end sealing plate 241 and the upper side of the second end sealing plate 242 are collected, and the collected first dye paste and the second dye paste are adjusted to other colors before being used for dyeing.

[0094] The first dye slurry and the second dye slurry of different colors must be continuously added and overflowed during the dyeing process to maintain the dyeing effect of the first paper surface and the second paper surface, and the usage amount is large; therefore, the first dye slurry and the second dye slurry are collected after overflowing, and then can be adjusted to other required colors, and then used for dyeing other color papers, thereby realizing the reuse of dye slurries and reducing material waste.

[0095] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A paper dyeing production system, characterized in that: include: A paper feeding device (1) for continuously feeding paper (8) forward; A dyeing and drying component is arranged at the front side of the paper feeding device (1), the dyeing and drying component comprises a dyeing device (2) and a first drying device (3), the first drying device (3) is arranged at the front side of the dyeing device (2), the dyeing device (2) comprises a first dyeing frame (21), the first dyeing frame (21) is provided with a first pressing roller (22) and a second pressing roller (23) which are parallel to each other, the axes of the first pressing roller (22) and the second pressing roller (23) both extend in the left-right direction, the first pressing roller (22) and the second pressing roller (23) are arranged in the right-left direction, The second pressing rollers (23) are arranged front to back and close to each other. The first pressing roller (22) and the second pressing roller (23) can pass through the paper (8) from top to bottom and press the paper (8). A first pulp storage tank (221) is formed between the upper side of the first pressing roller (22) and the first paper surface of the paper (8). A second pulp storage tank (231) is formed between the upper side of the second pressing roller (23) and the second paper surface of the paper (8). The first pulp storage tank (221) can store a first dyeing pulp to dye the first paper surface. The second pulp storage tank (231) can store the second dyeing slurry for dyeing the second paper surface, the dyeing device (2) also includes two first end sealing plates (241) and two second end sealing plates (242), the two first end sealing plates (241) are respectively arranged at the left and right ends of the first pulp storage tank (221), and the two second end sealing plates (242) are respectively arranged at the left and right ends of the second pulp storage tank (231), the first end sealing plates (241) are used to block the first dyeing slurry at the left and right ends of the first pulp storage tank (221), and the second end sealing plates (242) are used to block the first dyeing slurry at the left and right ends of the first pulp storage tank (221). 42) is used to block the second dyeing slurry at the left and right ends of the second slurry storage tank (231), the dyeing device (2) also includes a first slurry feeding pipe (26) and a second slurry feeding pipe (27), the first slurry feeding pipe (26) is provided with a first slurry feeding port (261) for adding the first dyeing slurry to the first slurry storage tank (221), the second slurry feeding pipe (27) is provided with a second slurry feeding port (271) for adding the second dyeing slurry to the second slurry storage tank (231), and the first drying device (3) is used to dry the dyed paper (8); A paper discharging device (6) is arranged on the front side of the dyeing and drying component, and the paper discharging device (6) is used to deliver the dyed paper (8).

2. The paper dyeing production system according to claim 1, characterized in that: The paper dyeing production system further comprises a surface treatment drying component, wherein the surface treatment drying component is arranged between the dyeing drying component and the paper discharging device (6), wherein the surface treatment drying component comprises a surface treatment device (4) and a second drying device (5), wherein the second drying device (5) is arranged at the front side of the surface treatment device (4), wherein the surface treatment device (4) is used for applying a surface treatment agent to the surface of the dyed paper (8), and wherein the second drying device (5) is used for drying the paper (8) after the surface treatment agent is applied.

3. The paper dyeing production system according to claim 2, characterized in that: The surface treatment device (4) comprises a surface treatment frame, on which a third pressing roller and a fourth pressing roller are provided which are parallel to each other, the axes of the third pressing roller and the fourth pressing roller both extend in the left-right direction, the third pressing roller and the fourth pressing roller are arranged front to back and close to each other, the third pressing roller and the fourth pressing roller can pass through the paper (8) from top to bottom and press the paper (8), a third pulp storage tank is formed between the upper side of the third pressing roller and the first paper surface of the paper (8), a fourth pulp storage tank is formed between the upper side of the fourth pressing roller and the second paper surface of the paper (8), the third pulp storage tank can store a surface treatment agent to apply the surface treatment agent to the first paper surface, and the fourth pulp storage tank can store a surface treatment agent to apply the surface treatment agent to the second paper surface.

4. The paper dyeing production system according to claim 1, characterized in that: The first drying device (3) comprises a first drying frame, on which a plurality of first drying cylinders (32) are arranged in an up-and-down staggered manner from back to front, and the first drying frame is also provided with a first drying net (33), the first drying net (33) is wound around the plurality of first drying cylinders (32), between which the plurality of first drying cylinders (32) can pass paper (8) and dry the paper (8), and the first drying net (33) is used to press the paper (8) onto the first drying cylinder (32); The dyeing and drying assembly further comprises a pre-drying device (7), wherein the pre-drying device (7) is arranged between the dyeing device (2) and the first drying device (3), and the pre-drying device (7) is provided with a pre-drying chamber (71), wherein the pre-drying chamber (71) is used for allowing the paper (8) to pass through and be pre-dried before entering the first drying device (3).

5. The paper dyeing production system according to claim 1, characterized in that: The dyeing device (2) further comprises two first material receiving troughs (25), the two first material receiving troughs (25) being respectively arranged at the lower side of the outer sides of the two first end sealing plates (241) and the two second end sealing plates (242), the first material receiving troughs (25) being used for receiving the first dyeing slurry overflowing from the upper side of the first end sealing plate (241) in the first slurry storage tank (221) and receiving the second dyeing slurry overflowing from the upper side of the second end sealing plate (242) in the second slurry storage tank (231).

6. A paper dyeing method, characterized in that: Using the paper dyeing production system according to any one of claims 1 to 5, the paper dyeing method comprises the following steps: S1: placing a paper roll to be dyed onto the paper feeding device (1), leading the paper (8) through between the first pressing roller (22) and the second pressing roller (23), the first pressing roller (22) and the second pressing roller (23) pressing the paper (8), so that the first pulp storage tank (221) is formed between the first paper surface of the paper (8) and the upper side of the first pressing roller (22), and the second pulp storage tank (231) is formed between the second paper surface of the paper (8) and the upper side of the second pressing roller (23); S2: the first slurry delivery port (261) continuously adds the first dye slurry to the first slurry storage tank (221), so that the first dye slurry is stored in the first slurry storage tank (221), and the first dye slurry exceeding the height of the first end sealing plate (241) overflows from the upper side of the first end sealing plate (241) to maintain the liquid level of the first dye slurry in the first slurry storage tank (221); and / or, the second slurry delivery port (271) continuously adds the second dye slurry to the second slurry storage tank (231), so that the second dye slurry is stored in the first slurry storage tank (221), and the second dye slurry exceeding the height of the second end sealing plate (242) overflows from the upper side of the second end sealing plate (242) to maintain the liquid level of the second dye slurry in the second slurry storage tank (231); S3: rotating the first pressing roller (22) and the second pressing roller (23) to pull the paper (8) to be transported from top to bottom, so that the first paper surface of the paper (8) is immersed in the first dyeing slurry for dyeing, and the second paper surface of the paper (8) is immersed in the second dyeing slurry for dyeing; S4: the dyed paper (8) is transported to the first drying device (3) for drying; S5: The dried paper (8) is transported to the paper discharging device (6) for delivery.

7. The paper dyeing method according to claim 6, characterized in that: In the step S2, the first slurry feeding port (261) and the second slurry feeding port (271) respectively add a first dyeing slurry to the first slurry storage tank (221) and add a second dyeing slurry to the second slurry storage tank (231), the first dyeing slurry and the second dyeing slurry have the same color, and the depth of the first dyeing slurry in the first slurry storage tank (221) is different from the depth of the second dyeing slurry in the second slurry storage tank (231).

8. The paper dyeing method according to claim 6, characterized in that: In the step S2, the first slurry delivery port (261) and the second slurry delivery port (271) respectively add a first dyeing slurry to the first slurry storage tank (221) and add a second dyeing slurry to the second slurry storage tank (231), and the first dyeing slurry and the second dyeing slurry have different colors.

9. The paper dyeing method according to claim 8, characterized in that: The edge of the paper (8) is close to the corresponding first end sealing plate (241) and the second end sealing plate (242), so as to separate the first dye paste and the second dye paste at the edge of the paper (8); The first slurry delivery port (261) is located above the first slurry storage tank (221), and the second slurry delivery port (271) is located above the second slurry storage tank (231); After step S5, the edge of the paper (8) is cut off.

10. The paper dyeing method according to claim 9, characterized in that: The first dye paste and the second dye paste overflowing from the upper side of the first end sealing plate (241) and the upper side of the second end sealing plate (242) are collected, and the collected first dye paste and the second dye paste are adjusted to other colors before being used for dyeing.

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