A multi-stage split hollow fiber membrane spinning device

Abstract

The utility model discloses a multistage shunt hollow fiber membrane spinning device relates to hollow fiber membrane technical field. This multistage shunt hollow fiber membrane spinning device, including the feeding plate, is seted up with the feed liquid inlet, the core liquid inlet on the feeding plate, the inside of feeding plate is equipped with the flow channel communication with feed liquid inlet, core liquid inlet respectively, the output of feeding plate is seted up with the shunt groove no.

Description

Technical Field

[0001] This utility model relates to the field of hollow fiber membrane technology, and in particular to a multi-stage splitting hollow fiber membrane spinneret. Background Technology

[0002] Hollow fiber membranes are membrane materials with a hollow tubular structure, typically ranging in diameter from a few micrometers to several hundred micrometers. They are characterized by large specific surface area, high separation efficiency, and ease of operation, and are widely used in water treatment, food processing, biomedicine, environmental protection, and many other fields. The hollow fiber membrane spinneret is a key piece of equipment in the production of hollow fiber membranes. Its main function is to extrude the spinning solution and core solution from the spinneret orifice according to specific process requirements, forming hollow fiber membrane filaments with specific structures and properties. Existing spinnerets generally include a feed solution tank, a core solution tank, a transfer pump, a spinneret, and corresponding connecting pipelines. The spinning solution and core solution are separately pumped from the tank to the spinneret, where they converge and are extruded from the spinneret orifice, entering a coagulation bath to solidify and form the membrane.

[0003] Existing spinnerets mostly adopt a single-stage flow channel design and lack a fine distribution structure. During the process of conveying the feed liquid and core liquid to the spinneret orifice, they are easily affected by factors such as uneven flow channel resistance and local turbulence, resulting in differences in fluid flow rate and pressure at different spinneret orifices. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage splitting hollow fiber membrane spinneret, which solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage diversion hollow fiber membrane spinneret, comprising a feed plate, wherein the feed plate is provided with a liquid feed inlet and a core liquid feed inlet, and the feed plate is provided with flow channels communicating with the liquid feed inlet and the core liquid feed inlet respectively, and the output end of the feed plate is provided with a diversion groove corresponding to and communicating with the flow channels;

[0006] The feed plate is stacked in sequence with a first diverter plate, a third diverter plate, and a spinneret plate, and the inner side of the spinneret plate is provided with an air knife.

[0007] The top of the first diversion plate is provided with a receiving groove adapted to the first diversion channel. The top of the first diversion plate is provided with a second diversion channel and a third diversion channel. The third diversion channel is connected to the receiving channel through the second diversion channel. The bottom outer wall of the third diversion channel is provided with a discharge hole.

[0008] The flow divider plate 1 is symmetrically arranged with flow divider plate 2 inside. The middle of flow divider plate 2 is an inclined plate. The outer wall of the inclined plate is provided with flow divider groove 4. The flow divider groove 4 is arrayed on the inclined plate. The flow divider groove 4 is correspondingly arranged below the discharge hole. The bottom outer wall of flow divider plate 1 is provided with discharge port.

[0009] The top outer wall of the spinneret is provided with a liquid collection groove, and the bottom outer wall of the spinneret is provided with a spinneret hole. A flow divider plate three is provided in the liquid collection groove, and a flow divider hole is provided through the outer wall of the flow divider plate three. The flow divider hole is horizontally arrayed on the flow divider plate three.

[0010] Preferably, the air outlet of the air knife is oriented towards the spinneret hole, and the air knife is connected to an external air source.

[0011] Preferably, the third diversion channel, the receiving channel, and the second diversion channel form an S-shaped curved channel.

[0012] Preferably, the feed plate, the first diverter plate, the air knife, the third diverter plate, and the spinneret are fixedly connected by bolts.

[0013] Preferably, the opening of the diversion channel four is directly opposite the discharge hole.

[0014] Preferably, the bottom of the liquid collection tank is connected to the input end of the spinneret hole.

[0015] Compared with related technologies, the multi-stage splitting hollow fiber membrane spinneret provided by this utility model has the following advantages:

[0016] Beneficial effects:

[0017] This utility model provides a multi-stage splitting hollow fiber membrane spinneret, which consists of a splitting channel one, an S-shaped curved channel (receiving channel, splitting channel two, and splitting channel three), an array of splitting channels four on a splitting plate two, and a horizontal array of splitting holes on a splitting plate three, forming a multi-stage splitting system. This avoids the problems of uneven membrane fiber wall thickness and large diameter deviation, improves the mechanical strength and separation performance stability of the hollow fiber membrane, ensures the uniformity of the final formed hollow fiber membrane, and significantly improves the overall quality and performance consistency of the product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a partial anatomical diagram of the structure of this utility model;

[0021] Figure 4This is a schematic diagram of the structure of the diverter plate of this utility model;

[0022] Figure 5 This is a schematic diagram of the reverse side structure of the diverter plate of this utility model;

[0023] Figure 6 This is a schematic diagram of the flow divider structure of this utility model;

[0024] Figure 7 This is a schematic diagram of part of the diverter structure of this utility model.

[0025] In the diagram: 1. Feed plate; 101. Liquid inlet; 102. Core liquid inlet; 103. Flow channel; 104. Diverter 1; 2. Diverter plate 1; 201. Receiving tank; 202. Diverter 2; 203. Diverter 3; 204. Diverter plate 2; 2041. Inclined plate; 2042. Diverter 4; 205. Discharge port; 3. Spinneret; 301. Liquid collection tank; 302. Spinneret hole; 4. Air knife; 5. Diverter plate 3; 501. Diverter hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] Please see Figure 1-7 This utility model provides a technical solution: a multi-stage diversion hollow fiber membrane spinneret, including a feed plate 1, on which a liquid inlet 101 and a core liquid inlet 102 are provided, and the feed plate 1 is provided with flow channels 103 that are respectively connected to the liquid inlet 101 and the core liquid inlet 102. The output end of the feed plate 1 is provided with a diversion groove 104 that is correspondingly connected to the flow channels 103.

[0029] The feed plate 1 is stacked in sequence with the flow divider 1 2, the flow divider 3 5 and the spinneret 3, and the inner side of the spinneret 3 is provided with an air knife 4.

[0030] The top of the diversion plate 1 2 is provided with a receiving groove 201 that is compatible with the diversion channel 1 104. The top of the diversion plate 1 2 is provided with a diversion channel 2 202 and a diversion channel 3 203. The diversion channel 3 203 is connected to the receiving groove 201 through the diversion channel 2 202. The bottom outer wall of the diversion channel 3 203 is provided with a discharge hole.

[0031] Inside the first flow divider 2, there is a second flow divider 204 symmetrically arranged. The middle of the second flow divider 204 is an inclined plate 2041. The outer wall of the inclined plate 2041 is provided with a fourth flow divider 2042. The fourth flow divider 2042 is arrayed on the inclined plate 2041. The fourth flow divider 2042 is correspondingly arranged below the discharge hole. The bottom outer wall of the first flow divider 2 is provided with a discharge port 205.

[0032] The top outer wall of the spinneret 3 is provided with a liquid collection tank 301, and the bottom outer wall of the spinneret 3 is provided with a spinneret hole 302. A flow divider 301 is provided in the liquid collection tank 301. A flow divider hole 501 is provided through the outer wall of the flow divider 301. The flow divider hole 501 is horizontally arrayed on the flow divider 301.

[0033] In this embodiment, the spinning liquid and the core liquid enter the device through the liquid inlet 101 and the core liquid inlet 102 on the feed plate 1, respectively, and are transported along their respective independent flow channels 103, and the initial diversion and distribution are completed at the diversion tank 104.

[0034] The fluid first enters the receiving groove 201 of the first diversion plate 2, and then flows through the S-shaped curved channel formed by the second diversion groove 202 and the third diversion groove 203. The S-shaped curved channel slows down the flow velocity and avoids turbulence, achieving initial diffusion and uniform distribution of the fluid. The fluid then falls through the discharge hole at the bottom of the third diversion groove 203 and onto the inclined diversion plate 204 symmetrically arranged below it. The fourth diversion groove 2042 arrayed on the inclined plate 2041 is directly opposite the discharge hole. The secondary diversion is completed by gravity and channel constraint, ensuring that the fluid is evenly distributed in the width direction, and then output through the discharge port 205.

[0035] The fluid, after being diverted, enters the collection tank 301 at the top of the spinneret 3. The diversion plate 3 5 installed in the tank distributes the fluid evenly through its horizontally arrayed diversion holes 501, forming a stable liquid layer and providing uniform pressure and flow rate for the spinneret.

[0036] The air outlet of the air knife 4 is positioned facing the spinneret 302, and the air knife 4 is connected to an external air source.

[0037] In this embodiment, while the fiber filaments are being extruded, the air knife 4 installed inside the spinneret 3 sprays out a stable airflow that directly acts on the surface of the fiber filaments just exiting the hole, achieving rapid cooling or preliminary drying.

[0038] Among them, the diversion channel 3 203, the receiving channel 201, and the diversion channel 2 202 form an S-shaped curved channel.

[0039] In this embodiment, the fluid first enters the receiving groove 201 of the first diversion plate 2, and then flows through the S-shaped curved channel formed by the second diversion groove 202 and the third diversion groove 203. The S-shaped curved channel slows down the flow rate and avoids turbulence, so as to achieve the initial diffusion and uniform distribution of the fluid.

[0040] The feed plate 1, the first diverter plate 2, the air knife 4, the third diverter plate 5, and the spinneret 3 are fixedly connected by bolts.

[0041] In this implementation scheme, high-strength stainless steel bolts of M6-M8 specifications are used for connection to effectively prevent fluid leakage at the joints of components; at the same time, fluororubber gaskets are installed between the mating surfaces of each component.

[0042] Among them, the opening of the diversion channel 4 2042 is directly opposite the discharge hole.

[0043] In this embodiment, it is ensured that the fluid flowing out of the discharge hole can fall vertically into the diversion channel 2042, and the fluid is prevented from splashing out of the channel.

[0044] The bottom of the liquid collection tank 301 is connected to the input end of the spinneret hole 302.

[0045] In this embodiment, the bottom of the liquid collection tank 301 is designed in a conical shape, which allows the fluid in the tank to naturally converge towards the input end of the spinneret hole 302.

[0046] Working principle: The spinning liquid and the core liquid enter the device through the liquid inlet 101 and the core liquid inlet 102 on the feed plate 1, respectively, and are transported along their respective independent flow channels 103. The initial diversion and distribution are completed at the diversion tank 104.

[0047] The fluid first enters the receiving groove 201 of the first diversion plate 2, and then flows through the S-shaped curved channel formed by the second diversion groove 202 and the third diversion groove 203. The S-shaped curved channel slows down the flow velocity and avoids turbulence, achieving initial diffusion and uniform distribution of the fluid. The fluid then falls through the discharge hole at the bottom of the third diversion groove 203 and onto the inclined diversion plate 204 symmetrically arranged below it. The fourth diversion groove 2042 arrayed on the inclined plate 2041 is directly opposite the discharge hole. The secondary diversion is completed by gravity and channel constraint, ensuring that the fluid is evenly distributed in the width direction, and then output through the discharge port 205.

[0048] The fluid, after being diverted, enters the collection tank 301 at the top of the spinneret 3. The diversion plate 3 5 installed in the tank distributes the fluid evenly through its horizontally arrayed diversion holes 501, forming a stable liquid layer and providing uniform pressure and flow rate for the spinneret.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-stage split-flow hollow fiber membrane spinneret, comprising a feed plate (1), characterized in that: The feed plate (1) is provided with a liquid inlet (101) and a core liquid inlet (102). The feed plate (1) is provided with a flow channel (103) that is connected to the liquid inlet (101) and the core liquid inlet (102) respectively. The output end of the feed plate (1) is provided with a diversion groove (104) that is connected to the flow channel (103). The feed plate (1) is stacked in sequence with a first diversion plate (2), a third diversion plate (5) and a spinneret (3), and the inner side of the spinneret (3) is provided with an air knife (4); The top of the first diversion plate (2) is provided with a receiving groove (201) adapted to the first diversion groove (104). The top of the first diversion plate (2) is provided with a second diversion groove (202) and a third diversion groove (203). The third diversion groove (203) and the receiving groove (201) are connected through the second diversion groove (202). The bottom outer wall of the third diversion groove (203) is provided with a discharge hole. The flow divider plate 1 (2) is symmetrically arranged with flow divider plate 2 (204) inside. The middle of the flow divider plate 2 (204) is an inclined plate (2041). The outer wall of the inclined plate (2041) is provided with flow divider groove 4 (2042). The flow divider groove 4 (2042) is arrayed on the inclined plate (2041). The flow divider groove 4 (2042) is correspondingly arranged below the discharge hole. The bottom outer wall of the flow divider plate 1 (2) is provided with discharge port (205). The top outer wall of the spinneret (3) is provided with a liquid collection tank (301), the bottom outer wall of the spinneret (3) is provided with a spinneret hole (302), a flow divider plate (5) is provided in the liquid collection tank (301), and a flow divider hole (501) is provided through the outer wall of the flow divider plate (5). The flow divider hole (501) is horizontally arrayed on the flow divider plate (5).

2. The multi-stage splitting hollow fiber membrane spinneret according to claim 1, characterized in that: The air outlet of the air knife (4) is positioned facing the spinneret hole (302), and the air knife (4) is connected to an external air source.

3. The multi-stage splitting hollow fiber membrane spinneret according to claim 1, characterized in that: The diversion channel three (203), the receiving channel (201), and the diversion channel two (202) form an S-shaped curved channel.

4. The multi-stage splitting hollow fiber membrane spinneret according to claim 1, characterized in that: The feed plate (1), the first diverter plate (2), the air knife (4), the third diverter plate (5), and the spinneret (3) are fixedly connected by bolts.

5. The multi-stage splitting hollow fiber membrane spinneret according to claim 1, characterized in that: The opening of the diversion channel four (2042) is directly opposite the discharge hole.

6. The multi-stage splitting hollow fiber membrane spinneret according to claim 1, characterized in that: The bottom of the liquid collection tank (301) is connected to the input end of the spinneret hole (302).

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