Spinning nozzle capable of preparing multi-channel hollow fiber membrane
The novel spineret design for producing multi-channel hollow fiber membranes addresses the lack of existing technologies by ensuring uniform distribution of core and casting liquids, resulting in membranes with enhanced mechanical strength and surface area.
Patent Information
- Application Number
- CN202422200257.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The prior art cannot prepare a multi-channel hollow fiber membrane, resulting in insufficient compressive performance of the membrane wire, easy to damage, and short service life.
A spinneret is designed, including a cast film liquid module, a core liquid module and a cover plate. Through the design of the cast film liquid distribution catheter groove and a core liquid needle, the cast film liquid and the core liquid are sprayed out simultaneously, forming a multi-channel hollow fiber membrane, enhancing the media to provide lining support, and the surface of the film wire is wave or zigzag, which increases the surface area.
The preparation of multi-porous hollow fiber membranes is realized, which improves the mechanical strength and compressive resistance of the membrane wires and extends the service life.
Smart Images
Figure CN223103147U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of membrane separation, and in particular, to a spinneret for preparing a hollow fiber membrane with multiple channels. Background Art
[0002] A hollow fiber membrane is a membrane with a fibrous shape and self-supporting function. Due to its unique advantages, it has been widely used in the field of water treatment. The preparation methods of hollow fiber membranes include the non-solvent induced phase separation method and the thermally induced phase separation method. In the non-solvent induced phase separation method, the casting solution and the core liquid are injected into the spinneret from different positions of the spinneret. Through the special structure inside the spinneret, after being ejected from the spinneret, the hollow fiber membrane filaments are obtained through subsequent treatments such as coagulation and rinsing. Therefore, the spinneret is a key component of the hollow fiber membrane production equipment.
[0003] The spinneret consists of a spinneret casting solution module and a spinneret cover plate. The spinneret casting solution module is provided with a feed liquid inlet and a core liquid inlet. Inside the spinneret, there are a core liquid flow channel and a casting solution pipeline. The core liquid and the casting solution are jointly extruded from the spinneret and form hollow fiber membrane filaments after gelation. In addition, by changing the core liquid flow channel into a braided tube channel and co-extruding the braided tube and the casting solution through the spinneret, hollow fiber membrane filaments with a braided tube as the internal support can be obtained after gelation. The above-mentioned spinnerets can only prepare hollow fiber membranes with a single channel, that is, there is only one flowing pipeline in one hollow fiber membrane filament. Currently, there is no spinneret that can prepare hollow fiber membranes with multiple channels.
[0004] Due to the presence of many small channels in the multi-channel hollow fiber membrane filaments, when in use, gas / liquid enters through the multiple small channels and then diffuses to the outer skin of the membrane filaments, making the membrane filaments have stronger compressive performance, better pressure resistance, the membrane layer is not easily damaged or ruptured, and the service life is longer. Therefore, there is an urgent need to develop a spinneret for preparing hollow fiber membranes with multiple channels. Summary of the Invention
[0005] Technical Problem: The technical problem to be solved by the utility model is to provide a spinneret for preparing a hollow fiber membrane with multiple channels, which can prepare multi-channel inner lining reinforced hollow fiber membrane filaments at one time. The membrane layer of the hollow fiber membrane filaments has many small hollow channels, making the pressure resistance of the membrane filaments better; the membrane filaments have an inner lining reinforced braided tube, the membrane layer is an integral structure, the mechanical strength of the membrane filaments is higher, and the membrane layer is not easily damaged or ruptured. The surface of the prepared hollow membrane filaments presents a wavy or serrated shape, which can increase the membrane surface area.
[0006] Technical Solution: To solve the above technical problem, the technical solution adopted in the embodiment of the utility model is: a spinneret for preparing a hollow fiber membrane with multiple channels, including;
[0007] Spinneret casting solution module, on which there are a casting solution inlet and a casting solution outlet. Inside the spinneret casting solution module, there is a through casting solution cavity. Both the casting solution inlet and the casting solution outlet are connected to the casting solution cavity. At the outlet of the casting solution cavity, there is a casting solution distribution duct groove, which extends to the casting solution outlet, so that the casting solution can only be ejected from the casting solution outlet after being distributed through the casting solution distribution duct groove, and a hollow fiber membrane filament with an irregular surface having the same shape as the distribution duct groove is obtained.
[0008] Further, the spinneret casting solution module is provided with a seal ring A groove for placing the seal ring A, so that the sealing effect between the spinneret casting solution module and the spinneret core liquid module is better, and to prevent the casting solution from entering the enhanced medium conduit channel.
[0009] Spinneret core liquid module, the core liquid component is provided with an enhanced medium conduit channel, a core liquid needle tube and a core liquid distributor. On the side of the core liquid distributor close to the spinneret cover plate, there is a seal ring B groove, and a seal ring B is arranged in the seal ring B groove. Inside the core liquid distributor, there is a core liquid cavity, and the core liquid cavity is provided with a core liquid feed pipe interface, and the core liquid feed pipe interface is connected to the core liquid cavity. The enhanced medium conduit channel penetrates through the core liquid cavity and extends on one side surface of the core liquid distributor, and the other end of the enhanced medium conduit channel is flush with the other side surface of the core liquid distributor; the core liquid needle tube is connected to the core liquid cavity and extends in the same direction as the enhanced medium conduit channel, ensuring that the core liquid can only be ejected through the core liquid needle tube after being evenly distributed in the core liquid cavity; the core liquid distributor is provided with a through threaded hole for assembling and fixing with the spinneret casting solution module and the spinneret cover plate.
[0010] The core liquid needle tubes are evenly distributed around the enhanced medium conduit channel, which can be one week or multiple weeks.
[0011] Further, a flow dividing block is arranged in the core liquid cavity, which can make the core liquid more evenly distributed in the core liquid cavity.
[0012] Further, on the side of the core liquid distributor close to the spinneret cover plate, there is a seal ring B groove, and a seal ring B is arranged in the seal ring B groove, so that the sealing effect between the spinneret core liquid module and the spinneret cover plate is better, preventing the core liquid from leaking outwards, and making the core liquid only ejectable through the core liquid needle tube.
[0013] Further, at the enhanced medium conduction inlet, there is a seal ring C groove for placing the seal ring C, so that the sealing effect between the spinneret core liquid module and the spinneret cover plate is better.
[0014] Spinneret cover plate, on which there are an enhanced medium conduit inlet and a core liquid feed pipe.
[0015] The spinneret casting solution module is provided with threaded holes. The spinneret core liquid module and the spinneret cover plate are both provided with through ports. The spinneret cover plate, sealing ring C, sealing ring B, spinneret core liquid module, and spinneret casting solution module are sequentially fixed tightly together by bolts. After assembly and fixation, the spinneret cover plate, sealing ring C, sealing ring B, and spinneret core liquid module form a sealed core liquid cavity. The core liquid can only enter the core liquid cavity from the core liquid feed pipe. After the core liquid is evenly distributed in the core liquid cavity, it can only be ejected through the core liquid needle tube. The spinneret core liquid module and the spinneret casting solution module form a sealed cavity. The casting solution can only enter from the casting solution inlet and is ejected from the casting solution outlet after being distributed in the casting solution cavity.
[0016] The reinforcing medium conduit channel and the core liquid needle tube penetrate through the casting solution cavity and are flush with the casting solution outlet, so that the reinforcing medium, core liquid, and casting solution are ejected from the spinneret together.
[0017] Further, the casting solution distribution duct groove is serrated, arc-shaped, rectangular, etc.
[0018] Further, the side of the spinneret casting solution module close to the spinneret core liquid module is provided with a sealing ring A groove, and a sealing ring A is arranged in the sealing ring A groove 16.
[0019] Further, the diameter of the reinforcing medium conduit is 1 - 3 mm.
[0020] Further, the small diameter of the casting solution outlet 10 is 2 - 5 mm, and the large diameter is 0.1 - 1 mm larger than the small diameter 24. The small diameter refers to the diameter of the imaginary circle of the smallest contour of the casting solution outlet, and the large diameter refers to the diameter of the imaginary circle of the largest contour of the casting solution outlet.
[0021] Further, the diameter of the core liquid needle tube is 0.1 - 0.5 mm.
[0022] Further, the spinneret is used to prepare MABR membrane filaments, ultrafiltration membrane filaments, microfiltration membrane filaments, etc.
[0023] Beneficial effects: Compared with the prior art, the technical solution of the present utility model has the following beneficial effects: The present utility model can prepare porous channel inner lining reinforced hollow fiber membrane filaments. The obtained membrane filaments are supported by an inner lining reinforcing medium and have many small channels. The mechanical strength of the membrane filaments is higher, the compressive performance is stronger, and the pressure resistance is better.
[0024] The surface of the hollow fiber membrane filaments prepared by the present utility model is wavy or serrated, which can increase the membrane surface area.
[0025] The structure of the present utility model is simple, and the manufacturing process is simple. During the spinning production process, the reinforcing medium, core liquid, and casting solution are ejected simultaneously and formed at one time, and the performance of the membrane filaments is excellent. Brief Description of the Drawings
[0026] Figure 1 is the three - dimensional combined drawing of the present utility model;
[0027] Figure 2 is the schematic view from another angle of the three - dimensional combined drawing of the present utility model;
[0028] Figure 3 is the three - dimensional exploded view of the present utility model;
[0029] Figure 4 is the front view of the present utility model;
[0030] Figure 5 is the rear view of the present utility model;
[0031] Figure 6 is the three - dimensional drawing of the spinneret casting solution module of the present utility model;
[0032] Figure 7 is the front view of the spinneret casting solution module of the present utility model:
[0033] Figure 8 is the three - dimensional drawing of the spinneret core liquid module of the present utility model;
[0034] Figure 9 is the three - dimensional drawing from another angle of the spinneret core liquid module of the present utility model;
[0035] Figure 10 is the rear view of the spinneret core liquid module of the present utility model;
[0036] Figure 11 is the front view of the spinneret core liquid module of the present utility model.
[0037] Figure 12 is the schematic view of the outlet surface of the spinneret casting solution module of the present utility model.
[0038] In the figure: 1. Spinneret casting solution module; 2. Threaded hole; 3. Spinneret core liquid module; 4. Spinneret cover plate; 5. Core liquid feed pipe; 6. Casting solution inlet; 7. Reinforcing medium conduit inlet; 8. Core liquid needle tube; 9. Reinforcing medium conduit channel; 10. Casting solution outlet; 11. Bolt; 12. Seal ring A; 13. Seal ring B; 14. Seal ring C; 15. Casting solution distribution duct groove; 16. Seal ring A groove body; 17. Shunt block; 18. Seal ring B groove body; 19. Seal ring C groove body; 20. Core liquid distributor; 21. Casting solution cavity; 22. Core liquid cavity; 23. Core liquid feed pipe interface; 24. Small diameter; 25. Large diameter. Detailed Embodiments
[0039] The technical solutions of the present utility model will be described in detail below in conjunction with the drawings.
[0040] Please refer to Figure 1-11 , the present utility model provides a spinneret for preparing a multi-channel hollow fiber membrane, including;
[0041] The spinneret casting solution module 1 is provided with a casting solution inlet 6 and a casting solution outlet 10. A through casting solution cavity is arranged inside the spinneret casting solution module 1. The casting solution inlet 6 and the casting solution outlet 10 are both communicated with the casting solution cavity. A casting solution distribution duct groove 15 is arranged at the outlet of the casting solution cavity. The casting solution distribution duct groove can be set into irregular shapes such as serrated, arc-shaped, rectangular, etc.( Figure 6 is set to be serrated), the casting solution distribution duct groove 15 extends to the casting solution outlet 10. After the casting solution is distributed through the casting solution distribution duct groove 15, it is sprayed out from the casting solution outlet 10. The prepared hollow fiber membrane has an irregular filament surface, increasing the surface area of the filament. At the same time, the spinneret casting solution module 1 is provided with a threaded hole 2 for assembling and fixing with the spinneret core liquid module 3;
[0042] Further, the spinneret casting solution module 1 is provided with a seal ring A groove body for placing the seal ring A, so that the sealing effect between the spinneret casting solution module 1 and the spinneret core liquid module 3 is better, preventing the casting solution from entering the reinforcing medium duct channel 9.
[0043] The spinneret core liquid module 3, the core liquid element 3 is provided with a reinforcing medium duct channel 9, a core liquid needle tube 8 and a core liquid distributor 20. A core liquid cavity 22 is arranged inside the core liquid distributor 20. The core liquid cavity is provided with a core liquid feed pipe interface 23, and the core liquid feed pipe interface 23 is communicated with the core liquid cavity 22. The reinforcing medium duct channel 9 penetrates through the core liquid cavity 22 and extends on one side of the core liquid distributor 20. The other end of the reinforcing medium duct channel 9 is flush with the other side of the core liquid distributor 20; the core liquid needle tube 8 is communicated with the core liquid cavity and extends in the same direction as the reinforcing medium duct channel 9, ensuring that the core liquid can only be sprayed out through the core liquid needle tube after being evenly distributed in the core liquid cavity; the core liquid distributor 20 is provided with a through threaded hole 2 for assembling and fixing with the spinneret casting solution module 1 and the spinneret cover plate 4;
[0044] The core liquid needle tubes 8 are evenly distributed around the reinforcing medium duct channel 9;
[0045] Further, a flow dividing block 17 is arranged in the core liquid cavity, which can make the core liquid more evenly distributed in the core liquid cavity.
[0046] Further, the core liquid distributor 20 is provided with a seal ring B groove body 18 for placing the seal ring B, so that the sealing effect between the spinneret core liquid module 3 and the spinneret cover plate 4 is better, preventing the core liquid from leaking outwards, so that the core liquid can only be sprayed out through the core liquid needle tube 8.
[0047] A spinneret cover plate 4, on which there are an enhanced medium conduit inlet 7 and a core liquid feed pipe 5;
[0048] The spinneret casting solution module 1, the spinneret core liquid module 3, and the spinneret cover plate 4 are tightly fixed together by bolts 11. After assembly and fixation, the spinneret cover plate 4 and the spinneret core liquid module 3 form a sealed cavity. The core liquid can only enter the core liquid cavity from the core liquid feed pipe 5. After being evenly distributed in the core liquid cavity, the core liquid can only be ejected through the core liquid needle tube 8; the spinneret core liquid module 3 and the spinneret casting solution module 1 form a sealed cavity. The enhanced medium conduit channel 9 and the core liquid needle tube 8 both pass through the casting solution cavity and are flush with the casting solution outlet. The casting solution can only enter from the casting solution inlet and is ejected from the casting solution outlet after being distributed in the casting solution cavity;
[0049] Furthermore, the diameter of the enhanced medium conduit is 1 - 3 mm, which can increase the strength of the hollow fiber membrane filaments on the one hand and make the hollow fiber membrane filaments more straight on the other hand.
[0050] Furthermore, the small diameter 24 of the casting solution outlet 10 is 2 - 5 mm, and the large diameter 25 is 0.1 - 1 mm larger than the small diameter 24.
[0051] Furthermore, the diameter of the core liquid needle tube is 0.1 - 0.5 mm.
[0052] Furthermore, the core liquid needle tubes are evenly distributed around the circumference of the enhanced medium conduit, and the core liquid needle tubes can be distributed in one or more circles around the circumference of the enhanced medium conduit.
[0053] Furthermore, the spinneret is used for preparing MABR membrane filaments, ultrafiltration membrane filaments, microfiltration membrane filaments, etc.
[0054] The spinneret provided by the present utility model can be used for preparing MABR membrane filaments, ultrafiltration membrane filaments, and microfiltration membrane filaments.
[0055] Usage method: The enhanced medium enters from the enhanced medium conduit inlet 7 and exits from the enhanced medium conduit channel 9. The core liquid enters from the core liquid feed pipe 5, is evenly distributed in the core liquid cavity, and then is ejected from the core liquid needle tube 8. The casting solution enters from the casting solution inlet 6, is evenly distributed in the casting solution cavity, and then is ejected from the casting solution outlet 10. The enhanced medium, the core liquid, and the casting solution are ejected simultaneously through the spinneret of the present utility model. Then, the ejected membrane filaments are successively subjected to vapor phase transformation in the air gap, phase separation in the coagulation bath, rinsing and drying, and then a modification solution is coated on the surface, such as coating silicone resin or liquid silicone rubber plus a crosslinking agent. After crosslinking reaction and curing, hollow fiber membrane filaments with porous channels are prepared.
[0056] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above specific embodiments, and the above specific embodiments and the descriptions in the specification are only for further explaining the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the claims and their equivalents.
Claims
1. A spinneret for preparing a porous hollow fiber membrane, characterized in that, Comprising: A spinneret casting solution module (1), on which there are a casting solution inlet (6) and a casting solution outlet (10). Inside the spinneret casting solution module (1), there is a through casting solution cavity (21). The casting solution inlet (6) and the casting solution outlet (10) are both connected to the casting solution cavity (21). Inside the outlet of the casting solution cavity (21), there is a casting solution distribution duct groove (15), and the casting solution distribution duct groove (15) extends to the casting solution outlet (10); A spinneret core liquid module (3), which has a reinforcing medium duct channel (9), a core liquid needle tube (8), and a core liquid distributor (20). On the side of the core liquid distributor (20) close to the spinneret cover plate (4), there is a sealing ring B groove (18). Inside the sealing ring B groove, there is a sealing ring B (13). Inside the core liquid distributor (20), there is a core liquid cavity (22). The core liquid cavity is provided with a core liquid feed pipe interface (23), and the core liquid feed pipe interface (23) is connected to the core liquid cavity (22). The reinforcing medium duct channel (9) penetrates through the core liquid cavity (22) and extends on one side surface of the core liquid distributor (20). The other end of the reinforcing medium duct channel (9) is flush with the other side surface of the core liquid distributor (20). At the inlet of the reinforcing medium duct channel (9), there is a sealing ring C groove (19), and inside the sealing ring C groove (19), there is a sealing ring C (14); The core liquid needle tube (8) is connected to the core liquid cavity (22) and extends in the same direction as the reinforcing medium duct channel (9), ensuring that after the core liquid is evenly distributed in the core liquid cavity (22), it can only be ejected through the core liquid needle tube (8); A spinneret cover plate (4), on which there are a reinforcing medium duct inlet (7) and a core liquid feed pipe (5); The spinneret casting solution module (1) is provided with threaded holes (2), and the spinneret core liquid module (3) and the spinneret cover plate (4) are both provided with through holes. Through bolts (11), the spinneret cover plate (4), the sealing ring C (14), the sealing ring B (13), the spinneret core liquid module (3), and the spinneret casting solution module (1) are tightly fixed together. And after assembly and fixation, the spinneret cover plate (4), the sealing ring C (14), and the sealing ring B (13) form a closed core liquid cavity (22) with the spinneret core liquid module (3). The core liquid can only enter the core liquid cavity (22) from the core liquid feed pipe (5). After the core liquid is evenly distributed in the core liquid cavity (22), it can only be ejected through the core liquid needle tube (8); The spinneret core liquid module (3) and the spinneret casting solution module (1) form a closed casting solution cavity (21). The casting solution can only enter from the casting solution inlet (6) and is ejected from the casting solution outlet (10) after being distributed in the casting solution cavity (21); The reinforcing medium duct channel (9) and the core liquid needle tube (8) penetrate through the casting solution cavity (21) and are flush with the casting solution outlet (10).
2. The spinneret for preparing a porous hollow fiber membrane according to claim 1, characterized in that, The casting solution distribution duct groove (15) is serrated.
3. The spinneret for preparing a porous hollow fiber membrane according to claim 1, characterized in that, The casting solution distribution duct groove (15) is arc-shaped.
4. The spinneret for preparing a porous hollow fiber membrane according to claim 1, characterized in that, The side of the spinneret casting solution module (1) close to the spinneret core liquid module (3) is provided with a sealing ring A groove (16), and a sealing ring A (12) is arranged in the sealing ring A groove (16).
5. The spinneret for preparing a porous-channel hollow fiber membrane according to claim 1, characterized in that, A flow dividing block (17) is arranged in the core liquid cavity to make the core liquid more evenly distributed in the core liquid cavity (22).
6. The spinneret for preparing a porous hollow fiber membrane according to claim 1, characterized in that, The diameter of the reinforcing medium conduit channel (9) is 1-3 mm.
7. The spinneret for preparing a porous hollow fiber membrane according to claim 1, characterized in that, The small diameter (24) of the casting solution outlet (10) is 2-5 mm, and the large diameter (25) is 0.1-1 mm larger than the small diameter (24).
8. The spinneret for preparing a porous hollow fiber membrane according to claim 1, characterized in that, The diameter of the core liquid needle tube (8) is 0.1-0.5 mm.
9. The spinneret for preparing a porous hollow fiber membrane according to claim 1, characterized in that, The core liquid needle tubes (8) are evenly distributed around the circumference of the reinforcing medium conduit channel (9).
10. The spinneret for preparing a porous hollow fiber membrane according to claim 1, characterized in that, The spinneret is used to prepare MABR membrane filaments, ultrafiltration membrane filaments, and microfiltration membrane filaments.