Preparation system of lyocell cross-linked short fibers

Abstract

The utility model belongs to the field of lyocell fibers, and particularly relates to a preparation system of lyocell cross-linked short fibers. Comprising; the spraying module is used for spraying a cross-linking agent to the lyocell short fibers; the heating module is mounted at the rear end of the spraying module, and the heating module is used for heating and crosslinking the Lyocell short fibers; and the conveying module is used for conveying the Lyocell short fibers, so that the Lyocell short fibers sequentially pass through the spraying module and the heating module.

Description

Technical Field

[0001] The utility model belongs to the field of Lyocell fibers, and particularly relates to a preparation system for Lyocell cross-linked staple fibers. Background Art

[0002] Lyocell fiber is a highly crystalline and highly oriented regenerated cellulose fiber, which is prepared by physical dissolution and regeneration using N-methylmorpholine-N-oxide (NMMO) as a solvent. Due to its high crystallinity and orientation degree, the transverse binding force between fiber microfibrils is weak. After absorbing water and swelling in the wet state, under the action of mechanical external force, microfibrils are easily peeled off from the fiber surface, resulting in fibrillation. The fibrillation tendency of Lyocell fiber severely restricts its diversified applications and development.

[0003] In order to solve the problem of improving the fibrillation of Lyocell fiber, cross-linking treatment of the fiber is required. In the prior art, the main method for producing Lyocell cross-linked fiber is to immerse the fiber tow in a cross-linking agent solution or spray the cross-linking agent solution on the fiber filament tow, and then enter a high-temperature device for cross-linking reaction. However, obviously, there are certain deficiencies in this production method. The deficiencies are mainly reflected in that the production speed of the fiber filament tow is relatively fast, which results in the fiber filament tow not being able to fully contact with the cross-linking agent solution, and thus the cross-linking effect of Lyocell fiber is poor.

[0004] In order to solve the above technical problems, some manufacturers cut the Lyocell fiber filament tow to form Lyocell staple fibers. The cut Lyocell staple fibers can fully contact with the cross-linking agent solution, thereby achieving a better cross-linking effect. However, due to the lack of a production system adapted to Lyocell staple fibers in the prior art, the preparation of Lyocell staple fibers completely requires manual operation, resulting in low efficiency. Summary of the Utility Model

[0005] The utility model provides a preparation system for Lyocell cross-linked staple fibers, and its purpose is to solve the problems in the prior art

[0006] To achieve the above purpose, the utility model provides a preparation system for Lyocell cross-linked staple fibers, including: a spraying module, which is used to spray a cross-linking agent on the Lyocell staple fibers;

[0007] a heating module, which is installed at the rear end of the spraying module and is used to heat and cross-link the Lyocell staple fibers;

[0008] a conveying module, which is used to convey the Lyocell staple fibers so that the Lyocell staple fibers pass through the spraying module and the heating module in sequence.

[0009] In this solution, lyocell staple fibers are placed on the conveying module, and the conveying module can realize the conveying and movement of the lyocell staple fibers. At the same time, the spraying module sprays the crosslinking agent onto the lyocell staple fibers, and the crosslinking agent is mixed with the lyocell staple fibers. After the crosslinking agent is mixed with the lyocell staple fibers, the conveying device transports the lyocell staple fibers into the heating module, and the heating module heats and crosslinks the lyocell staple fibers, and finally the lyocell crosslinked fibers are prepared.

[0010] Preferably, in order to make the mixing effect of the lyocell staple fibers and the crosslinking agent better, the spraying module described in this solution includes a plurality of spraying units, and the plurality of spraying units are arranged, and each spraying unit can spray independently.

[0011] In this solution, the lyocell staple fibers are sprayed sequentially by a plurality of spraying units, so that the lyocell staple fibers can come into contact with the crosslinking agent multiple times. Therefore, the mixing and contact of the lyocell staple fibers and the crosslinking agent are more sufficient, and the mixing effect of the lyocell staple fibers and the crosslinking agent is better, and a better crosslinking effect can be achieved.

[0012] Preferably, this solution further includes a water washing module, and the water washing module is arranged at the front end of the spraying module and / or the rear end of the heating module.

[0013] In this solution, a water washing module is arranged at the front end of the spraying module, and the water washing module can remove the impurity solvent in the lyocell staple fibers, thereby avoiding the influence of the impurity solvent on the mixing effect of the lyocell staple fibers and the crosslinking agent. In this solution, a water washing module is arranged at the rear end of the heating module, and the water washing module can remove the excess crosslinking agent in the lyocell staple fibers, thereby realizing the recovery of the crosslinking agent.

[0014] In this solution, the water washing module is used to separate the lyocell staple fibers from the crosslinking agent and the solvent. Compared with other separation methods, the structure is simpler and the efficiency is higher.

[0015] Preferably, in order to solve the problem of liquid leakage, this solution further includes a recovery module, and the recovery module is arranged below the conveying module.

[0016] In this solution, the lyocell staple fibers are located on the conveying module, and the excess liquid remaining on the lyocell staple fibers can pass through the conveying module and enter the recovery module. The liquid enters the recovery module to realize the recovery of the liquid, and at the same time, the problem of liquid leakage is also solved.

[0017] Preferably, in order to realize the recovery of the crosslinking agent, the recovery module described in this solution includes a first recovery unit, and the first recovery unit is arranged below the spraying module, and the first recovery unit is used to recover the crosslinking agent.

[0018] In this solution, a first recovery unit is arranged below the spraying module. After the crosslinking agent spraying unit sprays the crosslinking agent onto the lyocell staple fibers, the first recovery unit can recover the sprayed crosslinking agent, realizing the recovery of the crosslinking agent. By means of the first recovery unit, the crosslinking agent can be recovered without leakage.

[0019] Preferably, the recovery module in this solution includes a second recovery unit, and the second recovery unit is arranged below the water washing module.

[0020] When the water washing module washes the lyocell staple fibers, the cleaning water adhered to the lyocell staple fibers is recovered by the second recovery unit, solving the problem of cleaning water leakage.

[0021] Preferably, in order to separate the lyocell staple fibers from the liquid adhered to the lyocell staple fibers, this solution further includes a separation module, and the separation module is used to separate the lyocell staple fibers from the liquid.

[0022] Preferably, in order to separate the excess crosslinking agent from the lyocell staple fibers after spraying the crosslinking agent onto the lyocell staple fibers. This solution preferably includes a first separation unit in the separation module, and at least one first separation unit is installed at the rear end of each spraying unit.

[0023] In this solution, a first separation unit is arranged at the rear end of each spraying unit every time, so the first separation unit can separate the lyocell staple fibers from the crosslinking agent sprayed onto the lyocell staple fibers, realizing the recovery of the crosslinking agent and improving the utilization rate of the crosslinking agent.

[0024] Preferably, in order to separate the cleaning water from the lyocell staple fibers, the separation module in this solution includes a second separation unit, and the second separation unit is installed at the rear end of the water washing module.

[0025] In this solution, when the lyocell staple fibers pass through the water washing module, the lyocell staple fibers pass through the second separation unit, and the second separation unit separates the lyocell staple fibers from the cleaning water, realizing the recovery of the cleaning water.

[0026] Preferably, in order to solve the problem that the conveying module blocks the flow of the crosslinking agent, this solution preferably uses a mesh conveyor belt as the conveying module.

[0027] In this solution, the conveying module is set as a mesh conveyor belt, and the crosslinking agent can pass through the mesh conveyor belt for recovery, solving the problem that the conveying module blocks the flow of the crosslinking agent.

[0028] The beneficial effects of the present utility model are as follows: In this solution, lyocell staple fibers are placed in the conveying module, and the conveying module can realize the conveying and movement of the lyocell staple fibers. At the same time, the spraying module sprays the crosslinking agent onto the lyocell staple fibers, and the crosslinking agent is mixed with the lyocell staple fibers. After the crosslinking agent is mixed with the lyocell staple fibers, the conveying device transports the lyocell staple fibers into the heating module, and the heating module heats and crosslinks the lyocell staple fibers, and finally forms lyocell crosslinked fibers. Brief Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of a preparation system for lyocell crosslinked staple fibers.

[0030] The reference numerals include: conveying module 1, spraying unit 2, first recovery unit 3, first separation unit 4, heating module 5, water washing module 6, second recovery unit 7, second separation unit 8. Detailed Embodiments

[0031] In order to make the objectives, technical solutions and advantages of the embodiments clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0032] It should be noted that all actions of obtaining signals, information or data in this application are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located and obtaining authorization from the owner of the corresponding device.

[0033] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" are defined according to the own contour of the corresponding component parts. The terms such as "first, second" used in the present disclosure are used to distinguish one element from another element, and do not have sequence and importance.

[0034] Embodiment

[0035] Basically as shown in the attached Figure 1 As shown, a preparation system for lyocell crosslinked staple fibers is mainly used to crosslink lyocell staple fibers. The preparation system for lyocell crosslinked staple fibers in the embodiments of the present disclosure includes a conveying module 1, a spraying module, a heating module 5, a recovery module, a separation module and a water washing module 6.

[0036] The conveying module 1 is specifically preferably a mesh conveyor belt, which mainly includes a mesh belt, driving rollers, supporting rollers, a driving motor and a frame. The driving rollers, supporting rollers and driving motor are all installed on the frame. The driving rollers and supporting rollers are respectively arranged at both ends, and a mesh belt is arranged between the driving rollers and the supporting rollers as the driving power. The driving roller is in transmission connection with the output shaft of the driving motor. That is to say, when the driving motor works, the driving motor drives the driving roller to rotate. Since the mesh belt is installed on the driving roller, when the driving roller rotates, the mesh belt rotates accordingly. The upper surface of the mesh belt is used for evenly laying and placing Lyocell staple fibers. The structure of the mesh conveyor belt can also refer to the conventional mesh conveyor belt in the prior art.

[0037] It should be noted that since the conveying module 1 in the embodiment of the present disclosure uses a mesh conveyor belt, when the crosslinking agent is sprayed onto the Lyocell staple fibers, the crosslinking agent can drip downward from the gaps of the mesh belt, the crosslinking agent will not be blocked, and the crosslinking agent can be recycled, improving the recycling amount of the crosslinking agent.

[0038] It can be understood that: in the embodiment of the present disclosure, the conveying module 1 is preferably a mesh conveyor belt. However, obviously in some other embodiments, the conveying module 1 can also be other conveying devices in the prior art, such as a chain plate conveyor belt, etc.

[0039] In the embodiment of the present disclosure, the spraying module is installed above the conveying module 1. The spraying module is used to spray the crosslinking agent onto the top of the conveying module 1, so that the crosslinking agent is in full contact with the Lyocell staple fibers. The crosslinking agent can specifically be the crosslinking agent used for crosslinking Lyocell fibers in the prior art. In order to ensure that the spraying module can be stably installed above the conveying module 1, during implementation, the spraying module can be installed on a bracket or a ceiling, etc., to realize the stable installation of the spraying module and be located above the conveying module 1.

[0040] It should be noted that: since the Lyocell staple fibers are laid on the mesh belt, after the spraying module sprays out the crosslinking agent, the Lyocell staple fibers and the crosslinking agent can be in full contact. Compared with the contact between the Lyocell fiber bundle and the crosslinking agent, the mixing effect of the crosslinking agent is better.

[0041] After the crosslinking agent is sprayed onto the Lyocell staple fibers, in order to solve the problem of waste of the crosslinking agent, it is necessary to involve the recycling of the crosslinking agent. At the same time, after washing with water, it is also necessary to recycle the cleaning water, crosslinking agent and other solvents. Therefore, in the embodiment of the present disclosure, the recycling module is arranged below the conveying module 1. When the crosslinking agent, cleaning water or other solvents drip onto the conveying module 1, the crosslinking agent, cleaning water or other solvents pass through the conveying module 1 and drip onto the recycling module, realizing the recycling of the crosslinking agent, cleaning water or other solvents.

[0042] In the embodiments of the present disclosure, the spraying module specifically includes a number of spraying units 2, and the spraying units 2 are uniformly arranged and installed on the top of the conveying module 1. In the embodiments of the present disclosure, it is more preferable that the spraying module includes three spraying units 2, and the three spraying units 2 are uniformly arranged and installed. The three spraying units 2 can spray the Lyocell staple fibers three times. The spraying unit 2 can be a conventional nozzle or other spraying device in the prior art, as long as it is ensured that the crosslinking agent can be sprayed onto the Lyocell staple fibers.

[0043] Meanwhile, in order to correspond to the three spraying units 2, in the embodiments of the present disclosure, the recovery module includes three first recovery units 3, and the three first recovery units 3 correspond to the three spraying units 2 to ensure that the crosslinking agent sprayed by the spraying unit 2 can be accurately recovered. The first recovery unit 3 is specifically preferably a recovery tank, and the recovery tank is arranged below the spraying unit 2. The recovery tank is used to receive the crosslinking agent, thereby solving the problem of crosslinking agent leakage and increasing the recovery amount of the crosslinking agent.

[0044] It can be understood that in the embodiments of the present disclosure, a first recovery unit 3 is configured below each spraying unit 2 to recover the crosslinking agent. However, obviously, in some other embodiments, if the size of the first recovery unit 3 is set to be large enough, the number of the first recovery units 3 can be reduced. For example, if the receiving area of the first recovery unit 3 is set to be able to fully fit the bottom of the entire conveying module 1, in this case, the crosslinking agent sprayed by the three spraying units 2 can be recovered by one first recovery unit 3.

[0045] In order to ensure that after each spraying, the Lyocell staple fibers can be separated from the crosslinking agent to realize the recovery of the crosslinking agent. In the embodiments of the present disclosure, a separation module is configured, and the separation module includes a first separation unit 4. The first separation unit 4 is preferably a pressing roller. In the embodiments of the present disclosure, at least one first separation unit 4 is provided at the rear end of each spraying unit 2. After the spraying module sprays the crosslinking agent onto the Lyocell staple fibers, the first separation unit 4 separates the crosslinking agent from the Lyocell staple fibers.

[0046] Taking an application scenario as an example: when the Lyocell staple fibers are sprayed with the crosslinking agent by the spraying unit 2, the first separation unit 4 separates the crosslinking agent from the Lyocell staple fibers. Through the three spraying units 2, the Lyocell staple fibers are sprayed with the crosslinking agent three times, and the crosslinking agent is separated three times through the first separation unit 4. Through the three-time spraying of the crosslinking agent, the mixing effect of the crosslinking agent and the Lyocell staple fibers is better.

[0047] In order to ensure a better separation effect between Lyocell staple fibers and the crosslinking agent, in the embodiments of the present disclosure, it is preferably to arrange three first separation units 4 at the rear end of the third spraying unit 2, and realize squeezing the Lyocell staple fibers three times through three first recovery units 3, so that the separation effect between the Lyocell staple fibers and the crosslinking agent is better, and the recovery amount of the crosslinking agent is higher.

[0048] The first separation unit 4 in the embodiments of the present disclosure is a pressing roller, and two pressing rollers are arranged, one on the top and the other on the bottom. The pressing rollers can be installed on the frame. The gap between the upper and lower pressing rollers allows the mesh belt in the conveying module 1 to pass through. Each pressing roller is in transmission connection with a driving motor. The driving motor drives the pressing roller to rotate.

[0049] Taking an application scenario as an example: When the Lyocell staple fibers are on the surface of the mesh belt, the Lyocell staple fibers pass through the gap between the upper and lower pressing rollers. The pressing rollers realize the separation of the Lyocell staple fibers from the adhered crosslinking agent.

[0050] In the embodiments of the present disclosure, the conveying module 1 passes through the heating device, and the heating device is preferably a steam heating device. When the Lyocell staple fibers move into the heating device, the Lyocell staple fibers enter the interior of the heating device. The heating device realizes the crosslinking reaction of the Lyocell staple fibers.

[0051] When the Lyocell staple fibers are heated by the heating device and the crosslinking reaction is completed, the Lyocell staple fibers are output from the outlet of the heating device. After the Lyocell staple fibers are output from the heating device, in order to clean the crosslinking agent remaining on the Lyocell staple fibers, a water washing module 6 is arranged at the rear end of the heating device in the embodiments of the present disclosure. The water washing module 6 can spray cleaning water on the Lyocell staple fibers to realize the separation of the remaining crosslinking agent from the Lyocell fibers. The water washing module 6 can also be a nozzle or a sprinkler head in the prior art. It only needs to ensure that it can spray cleaning water.

[0052] In order to recover the mixed liquid of the cleaning water and the crosslinking agent cleaned out, the recovery module in the embodiments of the present disclosure includes a second recovery unit 7, and the second recovery unit 7 is installed below the water washing module 6.

[0053] Taking an application scenario as an example: After the water washing module 6 sprays cleaning water on the Lyocell staple fibers, the cleaning water and the remaining crosslinking agent pass through the conveying module 1 and enter the second recovery unit 7, and the second recovery unit 7 recovers the cleaning water and the crosslinking agent.

[0054] In order to separate the cleaning water and the Lyocell staple fibers more thoroughly, the separation module in the embodiments of the present disclosure includes a second separation unit 8, and the second separation unit 8 is installed at the rear end of the water washing module 6. The second separation unit 8 can realize the separation of the Lyocell staple fibers from the cleaning water. The second separation unit 8 in the embodiments of the present disclosure also includes pressing rollers arranged up and down, which will not be elaborated in the embodiments of the present disclosure.

[0055] Before the lyocell staple fibers are sprayed by the spraying module, a large amount of impurities (usually impurity solution) will remain on the surface of the lyocell staple fibers. Therefore, in order to separate the impurities from the lyocell staple fibers, a water washing module 6 is also provided in front of the spraying module. The water washing module 6 is used to separate the lyocell staple fibers from the impurities. In the embodiment of the present disclosure, in order to recover the cleaned impurities, a second recovery unit 7 is also provided below the water washing module 6. At the same time, a second separation unit 8 is also provided corresponding to the water washing module.

[0056] The following is a more detailed description through specific embodiments: When it is necessary to crosslink the lyocell staple fibers, first place the lyocell staple fibers on the conveying module 1, and the conveying module 1 moves the lyocell staple fibers. The lyocell staple fibers first pass through the spraying module, and the spraying module sprays the crosslinking agent onto the lyocell staple fibers. Then the lyocell staple fibers and the crosslinking agent are separated by the first separation module. After that, the lyocell staple fibers enter the heating device, and the heating device realizes the heating crosslinking of the lyocell staple fibers.

[0057] The above are only the embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A preparation system for lyocell cross-linked staple fibers, characterized in that: Comprising; A spraying module for spraying a crosslinking agent onto lyocell staple fibers; A heating module installed at the rear end of the spraying module for heating and crosslinking the lyocell staple fibers; A conveying module for conveying the lyocell staple fibers so that the lyocell staple fibers pass through the spraying module and the heating module in sequence.

2. The preparation system of the lyocell cross-linked staple fiber according to claim 1, characterized in that: The spraying module includes a plurality of spraying units arranged in a row, and each of the spraying units can spray independently.

3. The preparation system of the lyocell cross-linked staple fiber according to claim 1, wherein: It further includes a water washing module provided at the front end of the spraying module and / or the rear end of the heating module.

4. The preparation system of the lyocell crosslinked staple fiber according to any one of claims 1 to 3, characterized in that: It further includes a recovery module provided below the conveying module.

5. The preparation system of the lyocell cross-linked staple fiber according to claim 4, characterized in that: The recovery module includes a first recovery unit provided below the spraying module for recovering the crosslinking agent.

6. The preparation system of the lyocell crosslinked staple fiber according to any one of claims 1 to 3, characterized in that: It further includes a separation module for separating the lyocell staple fibers from the liquid.

7. The preparation system of the lyocell crosslinked staple fiber according to claim 6, characterized in that: The separation module includes a first separation unit, and at least one first separation unit is installed at the rear end of each spraying unit.

8. The preparation system of the lyocell cross-linked staple fiber according to claim 1, characterized in that: The conveying module is a mesh conveyor belt.

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