Hollow fiber wet and hot integrated spinning device

Abstract

The utility model relates to the technical field of spinning equipment, and particularly discloses a hollow fiber wet and hot integrated spinning device. The technical problem that existing wet spinning equipment and hot spinning equipment are independent and cannot be rapidly switched is solved. The device comprises a batching mechanism, a thermostatic bath and a wire collecting mechanism, and the batching mechanism realizes differential fluid path switching of hot-process high-temperature melting and wet-process low-temperature casting membrane liquid through combination of double wire outlet pipelines, a three-way valve, a gear pump and a metering pump; the stirring tank adopts a double-layer temperature control structure, and is combined with a heating pipe and a godet wheel in a thermostatic bath, so that the temperature environment requirements of two processes are met. In addition, the device is provided with a lifting mechanism and a moving mechanism, the height of the stirring shaft and the yarn collecting position can be adjusted, and the device is matched with a detachable spinning wheel assembly to flexibly adapt to fiber conveying paths of different technologies. According to the device, through integrated design, quick switching or synchronous operation of a wet process and a hot process can be realized without additional hardware.

Description

A hollow fiber wet-heat integrated spinning device Technical Field

[0001] This utility model relates to the field of spinning equipment technology, and in particular to a hollow fiber wet-heat integrated spinning device. Background Technology

[0002] Hollow fiber membranes, as a key separation membrane, play an irreplaceable role in modern industry and daily life. In wastewater treatment and reuse, they can efficiently remove impurities, microorganisms, and macromolecular pollutants from wastewater, achieving water purification and recycling, and contributing to environmental protection. In pure water production, they can precisely remove various fine impurities, ions, bacteria, and viruses from water, producing high-quality pure water that meets the stringent water quality requirements of industries such as electronics and pharmaceuticals. In the chemical industry, they can be used for the separation and purification of mixtures, optimizing chemical production processes and improving product purity and production efficiency. Currently, the mainstream preparation processes for hollow fiber membranes are non-solvent-induced phase separation (wet process, NIPS) and thermally induced phase separation (thermal process, TIPS).

[0003] Taking the patent "CN113957556A, a wet spinning production line for hollow fiber membrane forming" as an example, this patent focuses on wet spinning. Through the coordinated operation of a series of components such as a storage tank, a fiber feeding mechanism, and a coagulation bath, it ensures that the fiber membrane experiences constant tension during production, preventing breakage due to uneven tension and preventing stacking and entanglement during transport, effectively improving the production efficiency and product quality of wet spinning. However, this patent only designs for wet spinning and cannot address the field of thermal spinning. In actual production, different application scenarios have significantly different performance requirements for hollow fiber membranes. For example, in some scenarios with specific requirements for membrane porosity and pore size distribution, hollow fiber membranes prepared by thermal spinning are more advantageous; while in some applications that emphasize membrane flux and antifouling performance, wet-spun products are more suitable. When companies need to flexibly adjust their production processes according to market demand, switching between wet and thermal processes, this equipment, which can only perform a single process, becomes inadequate.

[0004] On the one hand, if a company wants to operate both processes, it must purchase two completely independent sets of production equipment. This not only means high equipment procurement costs but also requires a large amount of space to house the equipment, increasing the company's operating costs. On the other hand, the operating procedures and process parameters of the two types of equipment are completely different, requiring operators to receive separate professional training to become familiar with and master their respective operating methods. This undoubtedly increases the workload of operators and also places higher demands on the company's human resource management. Moreover, due to the independence of the equipment, it is impossible to operate the two processes simultaneously, leaving significant room for improvement in production efficiency and resource utilization. Summary of the Invention

[0005] In view of this, this utility model provides a hollow fiber wet and hot integrated spinning device to solve the technical problem that traditional wet spinning requires non-solvent exchange between low-temperature casting solution and coagulation bath, while hot spinning requires phase separation between high-temperature molten spinning solution and low-temperature coagulation bath. The two processes are independent and cannot be switched quickly.

[0006] This utility model provides a hollow fiber wet-heat integrated spinning device, comprising: a feeding mechanism, including a mixing tank mounted on a mounting base and a mixing shaft disposed inside the mixing tank; a constant temperature tank, disposed on one side of the feeding mechanism and having a heating tube and a guide wheel inside; and a take-up mechanism, including a take-up motor mounted on a take-up frame and a take-up roller connected to the take-up motor; wherein, the mixing tank is further provided with a yarn outlet pipe communicating with the constant temperature tank, and the end of the yarn outlet pipe is provided with a spinneret; the yarn outlet pipe includes a first yarn outlet tube and a second yarn outlet tube; wherein, the end of the first yarn outlet tube is provided with a first three-way valve, and the beginning of the second yarn outlet tube is provided with a second three-way valve; the outlet of the first three-way valve and the inlet of the second three-way valve are respectively connected to the inlet and outlet of a gear pump and a metering pump; by switching the use of the gear pump and the metering pump, wet-heat integrated spinning operation is realized.

[0007] Preferably, the mounting base is provided with a lifting mechanism; the stirring shaft is mounted on the lifting mechanism and can move closer to or further away from the stirring tank based on the lifting mechanism.

[0008] Preferably, the lifting mechanism includes a lifting base and a lifting seat that moves up and down based on a lifting shaft on the lifting base via a lifting sleeve; the lifting seat is also provided with a first threaded sleeve that is drivenly connected to a first screw on the lifting base; the first screw is driven manually or electrically.

[0009] Preferably, the stirring shaft is driven by a stirring motor located on the top of the lifting seat; the top of the stirring tank is also provided with a tank cover, and the stirring shaft can rotate based on the tank cover; the stirring tank has at least one feed inlet.

[0010] Preferably, the take-up mechanism is mounted on the moving mechanism and can move in a plane based on the moving mechanism; the moving mechanism includes a moving base and a moving seat that moves based on a moving shaft on the moving base via a moving sleeve; the moving seat is also provided with a second threaded sleeve that is drivenly connected to a second screw on the moving base; the second screw is driven manually or electrically.

[0011] Preferably, the mixing tank includes an outer shell and an inner liner disposed inside the outer shell via a placement rack; a gap is provided between the inner liner and the outer shell, and a heating tube is provided at the bottom and / or side of the inner liner and the outer shell.

[0012] Preferably, it also includes a plurality of baths disposed at the rear end of the constant temperature bath; the plurality of baths are configured as heating baths and / or cooling baths; the baths are provided with a plurality of spinning wheels for adjusting the transmission path of hollow fibers.

[0013] Preferably, the spinning wheels are arranged in groups, and each group of spinning wheels includes at least three independent spinning wheels; the guide wheel is detachably arranged from the bath and the constant temperature bath to adjust the installation position.

[0014] Preferably, it also includes a drying mechanism; the drying mechanism is located at the front end of the spinning mechanism, and the hollow fibers reciprocate in the drying area through a number of spinning wheels.

[0015] Preferably, the drying mechanism includes a drying chamber and a drying area disposed at the bottom of the drying chamber; the drying chamber is provided with a plurality of electric heating tubes and a plurality of air outlets for discharging heat; the top of the drying chamber is provided with an exhaust fan to assist in discharging heat to the drying area.

[0016] The hollow fiber wet-heat integrated spinning device provided by this utility model has the following beneficial effects:

[0017] This invention effectively solves the technical problem of traditional wet and thermal spinning equipment being independent and unable to switch quickly. Specifically, by setting up dual-outlet pipes and a three-way valve assembly in the batching mechanism, the power output of the gear pump and metering pump can be flexibly switched to achieve differentiated transport paths for high-temperature melting spinning solution (thermal) and low-temperature casting solution (wet). Simultaneously, the mixing tank adopts a double-layer temperature control structure and a heating or cooling bath, allowing the same equipment to meet both the environmental requirements of the wet low-temperature coagulation bath and the high-temperature melting and rapid cooling phase separation process of the thermal process. This design requires no additional hardware; by simply switching the fluid path and adjusting the temperature control system, the two processes can be quickly switched or reused on the same device. Compared to traditional independent equipment, it saves more than 50% in equipment investment costs and space occupation, while reducing the number of operators and the time spent on process switching, significantly improving production flexibility and efficiency, and providing enterprises with an efficient and economical solution to meet diverse market demands. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0019] Figure 1 is a schematic diagram of a hollow fiber wet-heat integrated spinning device;

[0020] Figure 2 is a schematic diagram of the batching mechanism;

[0021] Figure 3 is a structural schematic diagram of the batching mechanism from another angle;

[0022] Figure 4 is a schematic diagram of the drying mechanism;

[0023] Figure 5 is a schematic diagram of the moving mechanism;

[0024] Figure 6 is a structural schematic diagram of the lifting mechanism;

[0025] Parts and component numbers in the diagram:

[0026] 100- Batching mechanism, 110- Mounting base, 121- Mixing tank, 122- Bucket cover, 123- Feed inlet, 124- Mixing shaft, 125- First wire outlet tube, 126- Second wire outlet tube, 127- First three-way valve, 128- Second three-way valve, 129- Spinneret, 131- Gear pump, 132- Metering pump;

[0027] 200-Constant temperature bath, 210-Heating tube, 220-Guide roller, 230-Bath, 231-Spinning roller;

[0028] 300-Take-up mechanism, 310-Take-up frame, 311-Take-up motor, 312-Take-up roller;

[0029] 410-Lifting base, 411-Lifting sleeve, 412-Lifting shaft, 413-Lifting seat, 414-First screw, 415-First threaded sleeve;

[0030] 510-Moving base, 511-Moving sleeve, 512-Moving shaft, 513-Moving seat, 514-Second screw, 515-Second threaded sleeve;

[0031] 600-Drying mechanism, 610-Drying box, 611-Electric heating element, 612-Air outlet, 620-Drying area, 630-Exhaust fan. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0033] Example 1

[0034] Please refer to Figure 1. This embodiment of the invention provides a hollow fiber wet-heat integrated spinning device. Currently available hollow fiber membrane production equipment suffers from a significant technical limitation: it cannot flexibly switch between wet spinning (NIPS) and thermal spinning (TIPS) processes, nor can it achieve simultaneous operation of these two processes. This limitation necessitates the separate use of the equipment, thus complicating the entire production process. This complexity not only increases production costs but also makes operation cumbersome, negatively impacting production efficiency and economic benefits.

[0035] Therefore, this embodiment provides a hollow fiber wet and hot integrated spinning device that can solve the above problems. This device realizes flexible switching and synchronous operation of wet spinning and hot spinning processes.

[0036] In this embodiment, please refer to Figures 1 and 2. The integrated wet and hot spinning device includes a feeding mechanism 100, a constant temperature bath 200, and a take-up mechanism 300. The feeding mechanism 100 includes a mixing tank 121 mounted on a mounting base 110 and a mixing shaft 124 disposed inside the mixing tank 121. The constant temperature bath 200 is disposed on one side of the feeding mechanism 100 and has a heating tube 210 and a guide wheel 220 inside. The take-up mechanism 300 includes a take-up motor 311 mounted on a take-up frame 310 and a take-up roller 312 connected to the take-up motor 311. The mixing... The tank 121 is also equipped with a yarn outlet pipe that connects to the constant temperature bath 200. The end of the yarn outlet pipe is equipped with a spinneret 129. The yarn outlet pipe includes a first yarn outlet tube 125 and a second yarn outlet tube 126. The end of the first yarn outlet tube 125 is equipped with a first three-way valve 127, and the beginning of the second yarn outlet tube 126 is equipped with a second three-way valve 128. The outlet of the first three-way valve 127 and the inlet of the second three-way valve 128 are respectively connected to the inlet and outlet of the gear pump 131 and the metering pump 132. By switching the use of the gear pump 131 and the metering pump 132, wet and hot integrated spinning operation can be realized.

[0037] In operation, the materials to be reacted are first placed into the mixing tank 121, and the stirring shaft 124 is started to thoroughly mix the materials to ensure uniform mixing. Next, the heating tube 210 in the constant temperature bath 200 is turned on to adjust the temperature to a suitable spinning temperature, providing a stable thermal environment for subsequent spinning operations. Simultaneously, the take-up motor 311 is ensured to operate normally, driving the take-up roller 312 to rotate, ready to receive the spun yarn. Once the materials are uniformly mixed in the mixing tank 121 and the constant temperature bath 200 reaches the set temperature, according to actual spinning requirements, the first three-way valve 127 and the second three-way valve 128 are switched, and either the gear pump 131 or the metering pump 132 is selected appropriately. This allows the materials to be ejected from the spinneret 129 through the yarn outlet pipe, completing the spinning process in a humid and hot environment. The ejected yarn, guided by the guide wheel 220, is finally wound onto the take-up roller 312, completing the integrated humid and hot spinning operation.

[0038] When wet spinning (NIPS) is required:

[0039] The polymer and solvent are mixed in the mixing tank 121 at a low temperature (typically room temperature or slightly above room temperature) to form a homogeneous casting solution. A stirring shaft 124 ensures thorough mixing. The low-temperature casting solution is delivered to the spinneret 129 via a second filament outlet tube 126 and a second three-way valve 128 by a metering pump 132. The casting solution is extruded through the spinneret 129 into the coagulation bath (typically water or a non-solvent) of the constant temperature bath 200. The non-solvent in the coagulation bath exchanges with the solvent in the casting solution, initiating polymer phase separation and forming a solid hollow fiber membrane. The constant temperature bath 200 maintains a low temperature environment (e.g., 20-50°C) via a heating tube 210 to control the phase separation rate. The formed fibers are drawn out through a guide roller 220 and further cleaned or heat-treated in the bath 230 described below. Finally, the fibers are uniformly wound by a take-up mechanism 300.

[0040] When thermal spinning (TIPS) is required:

[0041] The stirring tank 121 is heated by the heating tube 210, raising the polymer temperature above its melting point (e.g., 150-250°C) to melt it. High-speed stirring by the stirring shaft 124 ensures melt homogeneity. The high-temperature molten spinning solution is delivered to the spinneret 129 via the first exit tube 125 and the first three-way valve 127, under high pressure by the gear pump 131. The melt extruded from the spinneret 129 enters the low-temperature coagulation bath (e.g., an ice-water mixture) of the constant temperature bath 200. Rapid cooling causes phase separation in the polymer solution, forming a polymer-rich phase (solid film) and a solvent-rich phase (pores), which eventually solidify into a film. After cooling and solidifying in the coagulation bath, the fibers are drawn out through the guide roller 220 and subsequently undergo solvent extraction in the bath 230 to remove residual solvent, forming a porous structure.

[0042] Furthermore, in this embodiment, the low temperature can be achieved using a cryogenic coolant circulation pump. This pump circulates the cryogenic coolant within the coagulation bath system, carrying away the heat generated during coagulation and maintaining the low-temperature environment of the coagulation bath. Both the bath 230 and the constant temperature bath 200 are equipped with circulation pipes at their bottoms that can be connected to the cryogenic coolant circulation pump. The cryogenic coolant circulation pump is typically used in conjunction with refrigeration equipment to achieve stable temperature control, and the flow rate and temperature of the coolant can be adjusted as needed.

[0043] Alternatively, an ice bath or cold water bath can be used. This typically involves placing a container filled with a freezing bath inside a larger container filled with ice or cold water, allowing the freezing bath to cool down through heat transfer. This method is simple, easy to implement, and inexpensive, but its disadvantages include a slow cooling rate and difficulty in precisely controlling the temperature.

[0044] Further, please refer to Figures 3 and 6. The mounting base 110 is provided with a lifting mechanism; the stirring shaft 124 is disposed on the lifting mechanism and can move closer to or further away from the stirring tank 121 based on the lifting mechanism.

[0045] The stirring element can move up and down with the lifting frame to achieve directional mixing across the entire height range. For example, high-level stirring promotes controlled surface solvent evaporation (NIPS mode requires reduced evaporation, TIPS mode requires uniform heating). Or, low-level stirring strengthens the shear force in the high-concentration area at the bottom to prevent sedimentation (e.g., PVDF / paraffin oil systems are prone to stratification).

[0046] It also allows for variable shear rate, which can be adjusted by changing the fluid shear gradient through adjusting the position of the agitator, thus optimizing the mixing efficiency of fluids with different viscosities (TIPS high-temperature melt requires high shear, while NIPS solution requires low shear to prevent air bubbles). This solves the "dead zone" problem of traditional fixed agitators, significantly improving mixing efficiency.

[0047] Further, referring to Figure 6, the lifting mechanism includes a lifting base 410 and a lifting seat 413 that moves up and down based on a lifting shaft 412 on the lifting base 410 via a lifting sleeve 411; the lifting seat 413 is also provided with a first threaded sleeve 415 that is pulsatorically connected to a first screw 414 on the lifting base 410; the first screw 414 is driven manually or electrically. The stirring shaft 124 is driven by a stirring motor disposed on the top of the lifting seat 413.

[0048] In use, the first screw 414 is driven to rotate manually or electrically. The first screw 414 cooperates with the first threaded sleeve 415, causing the lifting seat 413 to move up and down along the lifting shaft 412, thereby driving the stirring shaft 124 and the stirring component to move up and down, so as to realize the stirring operation of the stirring component at different height positions.

[0049] The stirring motor provides power for the rotation of the stirring shaft 124. It can adjust the stirring speed according to different mixing needs and coordinate with the lifting action of the stirring components to further optimize the mixing effect of various systems, meet more complex mixing process requirements, and show higher adaptability and efficiency in actual production applications.

[0050] Please refer to Figure 3. The top of the mixing tank 121 is also provided with a bucket cover 122, and the mixing shaft 124 can rotate based on the bucket cover 122; the mixing tank 121 is provided with at least one feed inlet 123.

[0051] The lid 122 can seal the mixing tank 121 when needed, or it can be opened when needed.

[0052] During use, different materials can be added to the mixing tank 121 through the feed inlet 123. Multiple feed inlets allow for the simultaneous or separate feeding of various materials, improving feeding efficiency. The lid 122 prevents materials from splashing out during mixing, ensuring a clean production environment. It also reduces the amount of external impurities entering the mixing tank 121, ensuring the purity of the mixture. Furthermore, the mixing shaft 124 rotates based on the lid 122, making its installation and fixation more stable. This effectively reduces shaking during mixing, further improving the stability and reliability of the mixing process and ensuring smooth operation.

[0053] Further, please refer to Figures 1 and 5. The take-up mechanism 300 is mounted on the moving mechanism and can move in a plane based on the moving mechanism. The moving mechanism includes a moving base 510 and a moving seat 513 that moves based on a moving shaft 512 on the moving base 510 via a moving sleeve 511. The moving seat 513 is also provided with a second threaded sleeve 515 that is pulverically connected to a second screw 514 on the moving base 510. The second screw 514 is driven manually or electrically.

[0054] In use, operators can choose to manually or electrically drive the second screw 514 according to actual wire take-up needs. If manual drive is selected, rotating the second screw 514 causes the second threaded sleeve 515 to move the moving seat 513 along the moving shaft 512 on the moving base 510, thereby adjusting the position of the wire take-up mechanism 300 on the plane and changing the wire take-up angle to meet different production requirements. If electric drive is selected, the motor drives the second screw 514 to rotate, which can also accurately control the planar movement of the wire take-up mechanism 300, adjust the wire take-up angle more efficiently, improve the automation level and ease of operation of the wire take-up operation, and adapt to diverse production scenarios.

[0055] Furthermore, the mixing tank 121 includes an outer shell and an inner liner disposed inside the outer shell by a placement rack; a gap is provided between the inner liner and the outer shell, and a heating tube 210 is provided at the bottom and / or side of the inner liner and the outer shell.

[0056] This allows the heating element 210 to heat the space between the inner liner and the outer shell, thereby indirectly heating the substances inside the inner liner. This indirect heating method ensures more uniform heating of the reactants within the inner liner, preventing localized overheating or undercooling and improving the stability and consistency of the reaction. Furthermore, the spacer design allows for the placement of insulation or heating materials within the space, helping to reduce heat loss, improve heating efficiency, and lower energy consumption.

[0057] At the same time, this structure also facilitates the installation, maintenance and replacement of the heating tube 210. When the heating tube 210 malfunctions, it can be repaired more easily, ensuring the normal operation of the mixing tank 121 and thus meeting the strict temperature control requirements of different chemical reactions.

[0058] Further, please refer to Figure 1, it also includes a plurality of bath tanks 230 disposed at the rear end of the constant temperature bath 200; the plurality of bath tanks 230 are configured as heating tanks and / or cooling tanks; the bath tanks 230 are provided with a plurality of spinning wheels 231 for adjusting the transmission path of hollow fibers.

[0059] In this embodiment, with the addition of the constant temperature bath 200, at least four baths 230 can be set up. By combining the functions of the four baths 230, complex fiber structure design and performance optimization can be achieved.

[0060] Case 1: High-performance lithium battery separator (TIPS)

[0061] Tank 1: -20℃ silicone oil bath (instantaneous phase separation to form micropores);

[0062] Tank 2: 85℃ hot water bath (to improve PVDF crystallinity and optimize closed-cell temperature);

[0063] Tank 3: 60℃ ethanol bath (to remove paraffin oil residue);

[0064] Tank 4: 40℃ bath containing Al2O3 nanoparticles (surface coating to enhance thermal stability).

[0065] Case 2: Non-Intended Transfusion Sheet (NIPS)

[0066] Tank 1: 25℃ water bath (to form an asymmetric pore structure);

[0067] Tank 2: 50℃ water bath (gradient phase separation to enlarge finger pores);

[0068] Tank 3: 65℃ isopropanol bath (displacement DMF);

[0069] Tank 4: 30℃ PEG solution bath (surface hydrophilic modification).

[0070] Furthermore, the spinning wheels 231 are arranged in groups, and each group of spinning wheels 231 includes at least three independent spinning wheels 231; the guide wheel 220 is detachably arranged with the bath 230 and the constant temperature bath 200 to adjust the installation position.

[0071] This allows for flexible adjustment of the hollow fiber transmission path between the bath 230 and the constant temperature bath 200, meeting the precise requirements of different limiting membrane production processes for fiber orientation and position. By changing the installation position of the guide roller 220 relative to the bath 230 and the constant temperature bath 200, precise control of the fiber processing time and angle in different temperature and solution environments can be achieved. This better optimizes the asymmetric pore structure, finger pore size, solvent replacement effect, and surface hydrophilic modification degree of the hemodialysis membrane, improving the overall performance and quality stability of the hemodialysis membrane to meet diverse clinical needs.

[0072] Furthermore, please refer to Figures 1 and 4, the system also includes a drying mechanism 600; the drying mechanism 600 is located at the front end of the spinning mechanism 300, and the hollow fibers are reciprocated in the drying zone 620 by a plurality of spinning wheels 231.

[0073] Furthermore, the drying mechanism 600 includes a drying chamber 610 and a drying area 620 disposed at the bottom of the drying chamber 610; the drying chamber 610 is provided with a plurality of electric heating tubes 611 and a plurality of air outlets 612 for discharging heat; the top of the drying chamber 610 is provided with an exhaust fan 630 to assist in discharging heat to the drying area 620.

[0074] During use, the heating element 611 is turned on to generate heat. This heat is quickly and evenly distributed in the drying zone 620 through the air outlet 612 and the exhaust fan 630. Driven by the spinning wheel 231, the hollow fibers reciprocate within the drying zone 620, ensuring they receive heat comprehensively and effectively removing residual moisture or solvents from the fiber surface and interior. This ensures the hemodialysis membrane has the appropriate dryness, preventing performance degradation due to moisture residue. After drying, the hollow fibers are collected in the fiber collection mechanism 300, guaranteeing stable quality and reliable performance of the collected hemodialysis membrane, providing strong support for subsequent clinical applications.

[0075] In this embodiment, the drying mechanism 600 can remove residual solvents or moisture. For example, after wet spinning, the fibers may retain a large amount of solvent (such as NMP, DMF) or moisture (such as water in the water bath) after coagulation or stretching in a water bath. For example, aramid wet spinning requires the removal of DMF solvent, and viscose fibers require the removal of impurities such as zinc sulfate from the coagulation bath. Alternatively, it can be used with dry spinning assistance. Even in dry spinning (where the solvent evaporates through hot air), the drying mechanism 600 can further ensure that the residual solvent level is below the safety standard (e.g., medical fibers require solvent residue <100ppm). By heating (hot air), the moisture in the solvent evaporates, meeting the requirements of subsequent processing (such as textiles, dyeing) or product performance (such as insulation, water resistance).

[0076] It can also achieve heat setting and structural optimization, such as the crystallization strengthening of synthetic fibers: during the drying process of polyester, nylon, etc. (at a temperature higher than the glass transition temperature, such as 100-180℃), the molecular chains are further oriented and crystallized through thermal motion, improving strength and rigidity. For example, the relaxation setting of elastic fibers: when spandex is dried (such as at 150-200℃), the curled structure is fixed under no tension or low tension, restoring high elasticity.

[0077] Furthermore, a pressure assembly is specifically installed at the air inlet on the top or side of the mixing tank 121. During actual use, the mixing tank can be tightly sealed by the lid 122 to ensure a stable internal environment. This pressure assembly allows for the convenient introduction of nitrogen or compressed air into the mixing tank 121 to achieve the desired process requirements.

[0078] The pressure assembly serves two main purposes: First, it can be used to pressurize casting solutions. Due to the high viscosity of casting solutions, ordinary driving force is often insufficient to ensure smooth flow; therefore, additional pressure is applied through a stirring tank to propel the flow. Second, the pressure assembly can also be used to isolate air and prevent the oxidation of certain polymeric materials at high temperatures. For example, during the melting process of ECTFE (ethylene-chlorotrifluoroethylene copolymer), nitrogen (N2) is introduced to protect the material and prevent high-temperature oxidation. In this way, the pressure assembly not only improves production efficiency but also ensures the stability of product quality.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hollow fiber wet-heat integrated spinning device, characterized in that, include: The batching mechanism (100) includes a mixing tank (121) mounted on a mounting base (110) and a stirring shaft (124) disposed inside the mixing tank (121); a constant temperature bath (200) is disposed on one side of the batching mechanism (100) and has a heating tube (210) and a guide wheel (220) inside; the take-up mechanism (300) includes a take-up motor (311) mounted on a take-up frame (310) and a take-up roller (312) connected to the take-up motor (311); wherein, the mixing tank (121) is also provided with a wire outlet tube that communicates with the constant temperature bath (200). The spinning tube is provided with a spinneret (129) at its end; the spinning tube includes a first spinning tube (125) and a second spinning tube (126); wherein, the first spinning tube (125) is provided with a first three-way valve (127) at its end, and the second spinning tube (126) is provided with a second three-way valve (128) at its beginning end; the outlet of the first three-way valve (127) and the inlet of the second three-way valve (128) are respectively connected to the inlet and outlet of a gear pump (131) and a metering pump (132); by switching the use of the gear pump (131) and the metering pump (132), wet and hot integrated spinning operation can be realized.

2. The hollow fiber wet-heat integrated spinning device according to claim 1, characterized in that, The mounting base (110) is provided with a lifting mechanism; the stirring shaft (124) is mounted on the lifting mechanism and can move closer to or further away from the stirring tank (121) based on the lifting mechanism.

3. The hollow fiber wet-heat integrated spinning device according to claim 2, characterized in that, The lifting mechanism includes a lifting base (410) and a lifting seat (413) that moves up and down based on a lifting shaft (412) on the lifting base (410) via a lifting sleeve (411); the lifting seat (413) is also provided with a first threaded sleeve (415) that is throttlely connected to a first screw (414) on the lifting base (410); the first screw (414) is driven manually or electrically.

4. The hollow fiber wet-heat integrated spinning device according to claim 3, characterized in that, The stirring shaft (124) is driven by a stirring motor located on the top of the lifting seat (413); the top of the stirring tank (121) is also provided with a bucket cover (122), and the stirring shaft (124) can rotate based on the bucket cover (122); the stirring tank (121) has at least one feed inlet (123).

5. The hollow fiber wet-heat integrated spinning device according to claim 1, characterized in that, The take-up mechanism (300) is mounted on the moving mechanism and can move in a plane based on the moving mechanism; the moving mechanism includes a moving base (510) and a moving seat (513) that moves based on a moving shaft (512) on the moving base (510) via a moving sleeve (511); the moving seat (513) is also provided with a second threaded sleeve (515) that is throttledly connected to a second screw (514) on the moving base (510); the second screw (514) is driven manually or electrically.

6. The hollow fiber wet-heat integrated spinning device according to claim 1, characterized in that, The mixing tank (121) includes an outer shell and an inner liner disposed inside the outer shell by a placement rack; a gap is provided between the inner liner and the outer shell, and a heating tube (210) is provided at the bottom and / or side of the inner liner and the outer shell.

7. The hollow fiber wet-heat integrated spinning device according to claim 1, characterized in that, It also includes a plurality of baths (230) disposed at the rear end of the constant temperature bath (200); the plurality of baths (230) are configured as heating tanks and / or cooling tanks; the baths (230) are provided with a plurality of spinning wheels (231) for adjusting the transmission path of hollow fibers.

8. The hollow fiber wet-heat integrated spinning device according to claim 7, characterized in that, The spinning wheels (231) are arranged in groups, and each group of spinning wheels (231) includes at least three independent spinning wheels (231); the guide wheel (220) is detachably arranged with the bath (230) and the constant temperature bath (200) to adjust the installation position.

9. The hollow fiber wet-heat integrated spinning device according to claim 1, characterized in that, It also includes a drying mechanism (600); the drying mechanism (600) is located at the front end of the spinning mechanism (300), and the hollow fibers reciprocate in the drying area (620) through a number of spinning wheels (231).

10. A hollow fiber wet-heat integrated spinning device according to claim 9, characterized in that, The drying mechanism (600) includes a drying chamber (610) and a drying area (620) disposed at the bottom of the drying chamber (610); the drying chamber (610) is provided with a plurality of electric heating tubes (611) and a plurality of air outlets (612) for discharging heat; the top of the drying chamber (610) is provided with an exhaust fan (630) to assist in discharging heat to the drying area (620).

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