Spinneret plate for hollow fiber membrane

Abstract

The utility model discloses a spinneret plate for a hollow fiber membrane, which comprises a top cover plate, a central distribution plate is connected below the top cover plate, a bottom spinneret plate is connected below the central distribution plate, a feed liquid inlet is arranged at the central position of the top cover plate, a plurality of feed liquid control valves are uniformly arranged on two sides of the feed liquid inlet, and the feed liquid control valves are connected with the top cover plate. A first sealing ring is arranged between the feed liquid control valve and the top cover plate; feed liquid flow channels are distributed from the central position of the central distribution plate to the periphery, the tail ends of the feed liquid flow channels are connected with a feed liquid outlet, a core liquid flow channel is arranged at the central position of the side edge of the central distribution plate, and the core liquid flow channel extends to the central position of the central distribution plate and is connected with a core liquid outlet; the tail of the feed liquid flow channel of the bottom spinneret plate is connected with a spinning nozzle, a second sealing ring is arranged between the spinning nozzle and the bottom spinneret plate, the tail of the core liquid outlet is connected with the spinning nozzle, each feed liquid flow channel can be independently adjusted, pressure consistency is guaranteed, and product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow fiber membranes, and particularly relates to a spinneret plate for hollow fiber membranes. Background Technique

[0002] Hollow fiber membranes are the core components of equipment in the fields of water treatment, hemodialysis, seawater desalination, gas separation, liquid separation, etc. They are an important new material used in reverse osmosis membranes, microfiltration membranes, nanofiltration membranes, ultrafiltration membranes, etc., and are gradually being more and more widely used in the fields of environmental protection water treatment, hemodialysis, gas separation, etc. With the improvement of the quality and performance requirements for hollow fiber membranes and the increase in demand, the existing domestic production processes and equipment are increasingly difficult to meet the production needs, and most rely on imports. The production and forming process of hollow fiber membranes can be briefly summarized as injecting the spinning dope and the core liquid into the spinneret from different positions of the spinneret base, and through the special structure inside the spinneret, ejecting hollow fiber filaments - commonly known as membrane filaments - from the spinneret cover.

[0003] The existing porous spinnerets cannot ensure that the dope entering each spinneret hole maintains the same pressure and uniformity, thus affecting the stability and consistency of product quality. Content of the Utility Model

[0004] The purpose of the utility model is to provide a spinneret plate for hollow fiber membranes to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A spinneret plate for hollow fiber membranes, including a top cover plate, a central distribution plate is connected below the top cover plate, a bottom spinneret plate is connected below the central distribution plate, a plurality of fixing holes are opened around the top cover plate, a dope inlet is provided at the center position, a plurality of dope control valves are evenly arranged on both sides of the dope inlet, and a first sealing ring is provided between the dope control valve and the top cover plate; a plurality of fixing holes are opened around the central distribution plate, and dope flow channels are distributed from its center position to the periphery, the end of the dope flow channel is connected to a dope outlet, a core liquid flow channel is provided at the center position of the side of the central distribution plate, and the core liquid flow channel extends to the central position of the central distribution plate and is connected to a core liquid outlet; a plurality of fixing holes are opened around the bottom spinneret plate, the bottom spinneret plate is provided with a dope flow channel at a position corresponding to the dope outlet on the central distribution plate, the end of the dope flow channel is connected to a spinneret head, a second sealing ring is provided between the spinneret head and the bottom spinneret plate, and the end of the core liquid outlet is connected to the spinneret head.

[0006] Preferably, the positions of the fixing holes on the top cover plate, the central distribution plate, and the bottom spinneret plate are the same, and they are fixedly connected by bolts.

[0007] Preferably, a threaded portion is provided at the lower part of the feed liquid control valve, and the threaded portion is threadedly connected to the top cover plate.

[0008] Preferably, a filter screen is provided inside the feed liquid inlet, and the feed liquid enters the lower feed liquid flow channel after being filtered by the filter screen.

[0009] Preferably, the first sealing ring and the second sealing ring are annular sealing rings.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the spinneret plate for hollow fiber membrane of the present utility model, by arranging a plurality of feed liquid control valves, each flow channel can be individually controlled, ensuring the pressure consistency of each flow channel, and improving the stability and product quality. Description of the Drawings

[0011] Figure 1 is the sectional view of the overall structure of the present utility model;

[0012] Figure 2 is the partial sectional view of the present utility model;

[0013] Figure 3 is the top view of the top cover plate of the present utility model;

[0014] Figure 4 is the top view of the central distribution plate of the present utility model;

[0015] Figure 5 is the top view of the bottom spinneret plate of the present utility model;

[0016] In the figure: 1. Top cover plate; 2. Central distribution plate; 3. Bottom spinneret plate; 4. Feed liquid control valve; 401. Threaded portion; 5. Feed liquid inlet; 501. Filter screen; 6. First sealing ring; 7. Core liquid flow channel; 8. Feed liquid flow channel; 9. Feed liquid outlet; 10. Second sealing ring; 11. Spinneret head; 12. Core liquid outlet; 13. Fixing hole. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figures 1-5, the present utility model provides a technical solution: a spinneret plate for hollow fiber membranes, including a top cover plate 1. A plurality of fixing holes 13 are provided around the top cover plate 1. A liquid inlet 5 is provided at the center of the top cover plate 1. A filter screen 501 is provided inside the liquid inlet 5. After the liquid passes through the filter screen 501, impurities are removed to ensure the purity of the liquid. A plurality of liquid control valves 4 are provided on both sides of the liquid inlet 5. A threaded portion 401 is provided at the rod position of the liquid control valve 4. It is connected to the top cover plate 1 through threads and sealed by a first sealing ring 6. The first sealing ring 6 is an annular sealing ring. Each liquid control valve 4 can be adjusted independently to control the flow rate of the liquid in the flow channel. When the flow rate is too fast, the liquid control valve 4 is rotated downward to reduce the space of the flow channel. When the flow rate is too slow, the liquid control valve 4 is rotated upward to increase the space of the flow channel.

[0019] A plurality of fixing holes 13 are provided around the central distribution plate 2. Liquid flow channels 8 are distributed from the central position of the central distribution plate 2 to the surrounding. The end of the liquid flow channel 8 is connected to a liquid outlet 9. After the liquid flows down through the top liquid inlet 5, it falls into the lower liquid flow channel 8 and is guided to the liquid outlet 9 in the liquid flow channel 8. A core liquid flow channel 7 is provided at the center position of the side of the central distribution plate 2. The core liquid flow channel 7 extends horizontally to the central position of the central distribution plate 2 and is connected downward to a core liquid outlet 12.

[0020] A plurality of fixing holes 13 are opened around the bottom spinneret plate 3. The positions of the fixing holes 13 on the top cover plate 1, the central distribution plate 2, and the bottom spinneret plate 3 are the same and are fixedly connected by bolts. A liquid flow channel 8 is provided at the position of the bottom spinneret plate 3 corresponding to the liquid outlet 9 on the central distribution plate 2. The end of the liquid flow channel 8 is connected to a spinneret head 11. A second sealing ring 10 is provided between the spinneret head 11 and the bottom spinneret plate 3. The second sealing ring 10 is an annular sealing ring. The end of the core liquid outlet 12 is connected to the spinneret head 11. The liquid and the core liquid enter the corresponding positions of the spinneret head 11 respectively.

[0021] The liquid flows into the liquid flow channel 8 on the central distribution plate 2 through the liquid inlet 5. After being guided by the liquid flow channel 8, it flows into the liquid outlet 9 at the end, and then flows from the liquid outlet 9 into the liquid flow channel 8 provided on the bottom spinneret plate 3. After being guided by the liquid flow channel 8, it flows into the corresponding position of the spinneret head 11 at the end.

[0022] The core liquid flows into the central distribution plate 2 through the core liquid flow channel 7 and enters the core liquid outlet 12 connected at the end. It flows through the core liquid outlet 12 into the corresponding position of the spinneret head 11 at the end of the core liquid flow channel 7 provided on the lower spinneret plate 3. The liquid and the core liquid are extruded through the spinneret head 11 to form a hollow fiber membrane.

[0023] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A spinneret for hollow fiber membranes, comprising a top cover plate (1), a central distribution plate (2) is connected below the top cover plate (1), and a bottom spinneret plate (3) is connected below the central distribution plate (2), characterized in that: A plurality of fixing holes (13) are formed around the top cover plate (1), and a liquid inlet (5) is provided at the central position. A plurality of liquid control valves (4) are evenly arranged on both sides of the liquid inlet (5). A first sealing ring (6) is provided between the liquid control valve (4) and the top cover plate (1); A plurality of fixing holes (13) are formed around the central distribution plate (2), and liquid flow channels (8) are distributed from its central position to the periphery. The end of the liquid flow channel (8) is connected to a liquid outlet (9). A core liquid flow channel (7) is provided at the central position of the side of the central distribution plate (2), and the core liquid flow channel (7) extends to the central position of the central distribution plate (2) and is connected to a core liquid outlet (12); A plurality of fixing holes (13) are formed around the bottom spinneret plate (3). A liquid flow channel (8) is provided at the position of the bottom spinneret plate (3) corresponding to the liquid outlet (9) on the central distribution plate (2). The end of the liquid flow channel (8) is connected to a spinneret head (11). A second sealing ring (10) is provided between the spinneret head (11) and the bottom spinneret plate (3). The end of the core liquid outlet (12) is connected to the spinneret head (11).

2. The spinneret for hollow fiber membrane according to claim 1, characterized in that: The positions of the fixing holes (13) on the top cover plate (1), the central distribution plate (2) and the bottom spinneret plate (3) are the same, and they are fixedly connected by bolts.

3. The spinneret for hollow fiber membrane according to claim 1, wherein: A threaded portion (401) is provided below the liquid control valve (4), and the threaded portion (401) is threadedly connected to the top cover plate (1).

4. The spinneret for hollow fiber membrane according to claim 1, characterized in that: A filter screen (501) is provided inside the liquid inlet (5), and the liquid passes through the filter screen (501) and then enters the lower liquid flow channel (8).

5. A spinneret for hollow fiber membranes according to claim 1, characterized in that: The first sealing ring (6) and the second sealing ring (10) are annular sealing rings.

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