Spinning assembly and spinning device

Abstract

The utility model provides a spinning assembly and a spinning device, and relates to the technical field of hollow fiber membrane production. The spinneret assembly comprises a spinneret plate and a spinneret. A membrane casting liquid distribution cavity is defined by the spinneret plate, and the membrane casting liquid distribution cavity is divided into a plurality of sub-distribution cavities through partition structures. And a core liquid injection port and a membrane casting liquid injection port are respectively formed in the spinning nozzle. A plurality of spinning nozzles are arranged in each sub-distribution cavity, a plurality of core liquid runners and a plurality of membrane casting liquid runners are defined by the spinneret plate, the plurality of core liquid runners are communicated with the core liquid injection ports of the plurality of spinning nozzles in a one-to-one correspondence manner, each membrane casting liquid runner is communicated with the sub-distribution cavity, and the membrane casting liquid injection port of each spinning nozzle is communicated with the sub-distribution cavity. The spinneret assembly provided by the utility model is divided into the plurality of sub-distribution cavities, so that the non-directionality and flowing space of the membrane casting liquid are reduced, and meanwhile, the spinneret plate is provided with the plurality of membrane casting liquid runners at the position of each sub-distribution cavity, so that the pressure of the membrane casting liquid is more stable.

Description

Technical Field

[0001] The present application relates to the technical field of hollow fiber membrane production, and in particular to a spinning assembly and a spinning device. Background Art

[0002] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art known to those skilled in the art.

[0003] In the existing hollow fiber membrane spinning assembly, multiple spinnerets share a casting liquid distribution cavity in the spinneret. Since the space of the casting liquid distribution cavity is large and the casting liquid has a certain viscosity, the flow of the casting liquid after flowing into the casting liquid distribution cavity has a large degree of non-directionality and the pressure stability is also poor, which is not conducive to the spinning of the spinneret, and thus affects the quality of the finished hollow fiber membrane. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a spinning assembly and a spinning device, aiming to solve the technical problem that the flow of the casting liquid after flowing into the casting liquid distribution chamber has great non-directionality and poor pressure stability.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a spinning assembly, comprising:

[0007] A spinneret defines a casting liquid distribution cavity, wherein a baffle structure is provided in the casting liquid distribution cavity, and the baffle structure divides the casting liquid distribution cavity into a plurality of sub-distribution cavities;

[0008] A spinneret is provided with a core liquid injection port at one end and a casting liquid injection port at the outer peripheral side of the spinneret;

[0009] In each of the sub-distribution chambers, there are multiple spinnerets, and the spinneret plate also defines multiple core liquid flow channels and multiple casting liquid flow channels. The multiple core liquid flow channels are connected one-to-one with the core liquid injection ports of the multiple spinnerets, each of the casting liquid flow channels is connected with the sub-distribution chamber, and the casting liquid injection port of each spinneret is connected with the sub-distribution chamber.

[0010] In one of the embodiments of the first aspect, the spinneret includes a first plate body and a second plate body connected to each other, a plurality of grooves are provided on the side of the first plate body facing the second plate body, a barrier portion is provided between each two adjacent grooves, and a plurality of the barrier portions constitute the barrier structure, and the second plate body is used to close the plurality of the grooves to form a plurality of the sub-distribution cavities.

[0011] In one embodiment of the first aspect, the barrier structure is a cross structure, and the cross structure divides the casting liquid distribution chamber into four sub-distribution chambers.

[0012] In one of the embodiments of the first aspect, the spinneret assembly further includes a first temperature sensor, the spinneret plate further defines a hot runner, the spinneret plate is provided with a liquid inlet connected to one end of the hot runner, and a liquid outlet connected to the other end of the hot runner, and the spinneret plate is provided with a first detection port connected to the hot runner, and the first temperature sensor is arranged through the first detection port for detecting the current temperature of the spinneret plate.

[0013] In one embodiment of the first aspect, each of the spinnerets has a spinneret, and a plurality of tapered outlets are provided on the spinneret plate. The plurality of tapered outlets correspond one-to-one to the spinnerets of the plurality of spinnerets, and a cone angle of each tapered outlet is α, satisfying: 60°≤α≤80°.

[0014] In the second aspect, an embodiment of the present application also provides a spinning device, comprising a core liquid conveying component, a casting liquid conveying component, a filtering component and the spinning component described in any of the above embodiments, wherein the core liquid conveying component and the casting liquid conveying component are respectively connected to one end of the filtering component, the core liquid conveying component is used to input the core liquid into the filtering component, the casting liquid conveying component is used to input the casting liquid into the filtering component, and the other end of the filtering component is arranged on the spinneret, for filtering the core liquid and inputting it into the core liquid flow channel, and for filtering the casting liquid and inputting it into the casting liquid flow channel.

[0015] In one embodiment of the second aspect, the filter assembly includes a filter chamber, a core liquid filter element, a casting liquid filter element and an adapter. The adapter is connected between the filter chamber and the spinneret and defines a core liquid filtration channel and a casting liquid filtration channel. The filter chamber defines a core liquid filtration cavity and a casting liquid filtration cavity. The core liquid delivery assembly and the casting liquid delivery assembly are respectively connected to the filter chamber. The core liquid filter element is arranged in the core liquid filtration cavity, and the casting liquid filter element is arranged in the casting liquid filtration cavity.

[0016] In one embodiment of the second aspect, the adapter and the spinneret jointly define a casting liquid distribution channel, a first core liquid distribution channel and a second core liquid distribution channel, the casting liquid distribution channel is connected to the casting liquid filtration channel, each of the casting liquid channels is connected to the casting liquid distribution channel, the first core liquid distribution channel and the second core liquid distribution channel are respectively connected to the core liquid filtration channel, wherein a part of the core liquid channels is connected to the first core liquid distribution channel, and the other part of the core liquid channels is connected to the second core liquid distribution channel.

[0017] In one of the embodiments of the second aspect, the core liquid delivery component includes a first core liquid delivery tube, a second core liquid delivery tube and a second temperature sensor, the second core liquid delivery tube is connected to the filter component, the first core liquid delivery tube is connected to the outer peripheral side of the second core liquid delivery tube, the second core liquid delivery tube is provided with a second detection port, and the second temperature sensor is arranged through the second detection port for detecting the current temperature of the core liquid in the second core liquid delivery tube.

[0018] In one embodiment of the second aspect, the casting liquid conveying assembly includes a first casting liquid conveying pipe, a second casting liquid conveying pipe and a third temperature sensor, the second casting liquid conveying pipe is connected to the filter assembly, the first casting liquid conveying pipe is connected to the outer peripheral side of the second casting liquid conveying pipe, the second casting liquid conveying pipe is provided with a third detection port, and the third temperature sensor is arranged through the third detection port for detecting the current temperature of the casting liquid in the second casting liquid conveying pipe.

[0019] Beneficial effects of this application:

[0020] The present application provides a spinneret assembly that divides the casting liquid distribution chamber into multiple sub-distribution chambers by providing a baffle structure within the chamber. Compared to a single casting liquid distribution chamber, the multiple sub-distribution chambers reduce the non-directionality and flow space of the casting liquid. Furthermore, the spinneret is provided with multiple casting liquid flow channels at each sub-distribution chamber, improving the pressure stability of the casting liquid. This allows the spinneret to spin more evenly and stably, thereby improving the quality of the finished hollow fiber membrane.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Shows a schematic diagram of the three-dimensional structure of the spinning device in some embodiments of the present application;

[0024] Figure 2 Shown Figure 1 Schematic diagram of the enlarged structure of area A in the middle;

[0025] Figure 3 Schematic diagram of the three-dimensional exploded structure of the spinneret assembly in some embodiments of the present application is shown;

[0026] Figure 4 A schematic cross-sectional view of a spinneret assembly and an adapter in some embodiments of the present application is shown;

[0027] Figure 5 Another cross-sectional structural diagram of the spinneret assembly and the adapter in some embodiments of the present application is shown;

[0028] Figure 6 Schematic diagram of a partial cross-sectional structure of a spinneret assembly in some embodiments of the present application is shown;

[0029] Figure 7 A schematic cross-sectional structural diagram of a filter assembly in some embodiments of the present application is shown.

[0030] Description of main component symbols:

[0031] 1000-spinning device; 100-spinning assembly; 110-spinning plate; 111-first plate body; 112-second plate body; 113-blocking structure; 1131-blocking part; 114-molding liquid distribution chamber; 1141-sub-distribution chamber; 115-core liquid flow channel; 116-molding liquid flow channel; 1171-liquid inlet; 1172-liquid outlet; 1173-first detection port; 1174-conical outlet; 120-spinneret; 121-core liquid injection port; 122-molding liquid injection port; 123-spinning nozzle; 130-first temperature sensor; 140-first sealing member; 150-second sealing member; 200-core liquid delivery assembly; 210- First core liquid delivery pipe; 220-second core liquid delivery pipe; 221-second detection port; 230-second temperature sensor; 300-casting liquid delivery assembly; 310-first casting liquid delivery pipe; 320-second casting liquid delivery pipe; 321-third detection port; 330-third temperature sensor; 400-filter assembly; 410-filter chamber; 411-core liquid filter cavity; 412-casting liquid filter cavity; 420-core liquid filter element; 430-film liquid filter element; 440-adapter; 441-core liquid filtration flow channel; 442-casting liquid filtration flow channel; 443-casting liquid distribution flow channel; 444-first core liquid distribution flow channel; 445-second core liquid distribution flow channel. DETAILED DESCRIPTION

[0032] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0035] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0036] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] Hollow fiber membranes are membrane materials with high specific surface area and excellent separation properties. Their unique hollow structure allows fluid to flow between the inner and outer surfaces of the membrane, making them widely used in fields such as water treatment, gas separation, and biomedical engineering. During hollow fiber membrane production, core liquid and casting solution are fed into a spinneret. The casting solution is then distributed to each spinneret through a casting solution distribution chamber. The core liquid is then encapsulated by the casting solution and ejected from the spinneret. This process then undergoes a phase conversion reaction with the core liquid to form the hollow fiber membrane.

[0038] In the existing spinning assembly, multiple spinnerets share a casting liquid distribution cavity in the spinneret. Since the space of the casting liquid distribution cavity is large and the casting liquid has a certain viscosity, the flow of the casting liquid after flowing into the casting liquid distribution cavity is highly non-directional and the pressure stability is also poor, which is not conducive to the spinneret to spin.

[0039] In addition, the current production process of hollow fiber membranes also has the following defects: First, the spinneret used in the production process of hollow fiber membranes is a precision component. When the core liquid and the casting liquid contain a large amount of solid impurities and a large volume, it is easy to cause the spinneret to become clogged, affecting the quality of the spinning. Second, when the spinneret ejects the hollow fiber membrane through the outlet of the spinneret, the hollow fiber membrane easily contacts the spinneret and causes broken wires. Third, the core liquid and the casting liquid are prone to passive cooling after being input into the spinneret, resulting in difficulty in the flow of the core liquid and the casting liquid, and the different feed pressures of the spinneret cause process distortion. Fourth, there is a lack of temperature monitoring of the core liquid and the casting liquid input into the spinneret. The temperature of the casting liquid and the core liquid is an extremely important parameter in the production process of hollow fiber membranes. Different temperatures will affect the pore size and porosity of the hollow fiber membrane, thereby affecting the filtration performance of the hollow fiber membrane.

[0040] In order to solve the above technical problems, Figure 1 and Figure 3 As shown, in the first aspect, an embodiment of the present application provides a spinning assembly 100, which relates to the technical field of hollow fiber membrane production and is mainly used in a spinning device 1000 for producing hollow fiber membranes.

[0041] Combine Figures 4 to 6 As shown, the spinneret 100 provided in this embodiment includes a spinneret 110 and a spinneret 120. The spinneret 110 defines a casting liquid distribution chamber 114. A baffle structure 113 is provided in the casting liquid distribution chamber 114. The baffle structure 113 divides the casting liquid distribution chamber 114 into a plurality of sub-distribution chambers 1141. A core liquid injection port 121 is provided at one end of the spinneret 120, and a casting liquid injection port 122 is provided on the outer peripheral side of the spinneret 120.

[0042] In each sub-distribution cavity 1141, there are multiple spinnerets 120, and the spinneret 110 also defines multiple core liquid flow channels 115 and multiple casting liquid flow channels 116. The multiple core liquid flow channels 115 are connected one-to-one with the core liquid injection ports 121 of the multiple spinnerets 120, each casting liquid flow channel 116 is connected with the sub-distribution cavity 1141, and the casting liquid injection port 122 of each spinneret 120 is connected with the sub-distribution cavity 1141.

[0043] It should be noted that the core liquid flow channel 115 can input core liquid into the spinneret 120 through the core liquid injection port 121, and the casting liquid flow channel 116 is used to input casting liquid into the sub-distribution cavity 1141, so that the sub-distribution cavity 1141 can input casting liquid into the spinneret 120 through the casting liquid injection port 122, and finally the core liquid is sprayed out from the spinneret 120 in a manner that the casting liquid wraps the core liquid. "A plurality of core liquid flow channels 115 are connected to the core liquid injection ports 121 of the plurality of spinnerets 120 in a one-to-one correspondence" means that the core liquid flow channels 115 and the spinnerets 120 are in a one-to-one correspondence, and each core liquid flow channel 115 is connected to a core liquid injection port 121.

[0044] It is understandable that the spinneret assembly 100 provided in this embodiment, by providing a baffle structure 113 in the casting liquid distribution chamber 114, can achieve the purpose of dividing the casting liquid distribution chamber 114 into a plurality of sub-distribution chambers 1141. Compared with sharing a single casting liquid distribution chamber 114, the use of a partition design to divide the casting liquid distribution chamber 114 into a plurality of sub-distribution chambers 1141 can reduce the non-directionality and flow space of the casting liquid. At the same time, the spinneret 110 is provided with a plurality of casting liquid flow channels 116 at the position of each sub-distribution chamber 1141, thereby improving the pressure stability of the casting liquid. As a result, the spinneret 120 is made more uniform and stable during spinning, thereby improving the quality of the finished hollow fiber membrane.

[0045] like Figure 3 As shown, in one embodiment, the spinneret 110 includes a first plate body 111 and a second plate body 112 connected to each other, and a plurality of grooves are provided on the side of the first plate body 111 facing the second plate body 112, and a barrier portion 1131 is provided between each two adjacent grooves, and the plurality of barrier portions 1131 form a barrier structure 113, and the second plate body 112 is used to close the plurality of grooves to form a plurality of sub-distribution cavities 1141.

[0046] In this embodiment, a plurality of grooves are provided on the first plate 111 , each two adjacent grooves are separated by a barrier 1131 , and the plurality of grooves are closed by the second plate 112 to form a plurality of sub-distribution chambers 1141 .

[0047] Continue reading Figure 3 For example, the baffle structure 113 can be a cross structure, which divides the casting liquid distribution chamber 114 into four sub-distribution chambers 1141. Each sub-distribution chamber 1141 can be provided with twelve core liquid flow channels 115, twelve spinnerets 120 and four casting liquid flow channels 116. In this way, the entire spinneret assembly 100 has a total of forty-eight spinnerets. Of course, the baffle structure 113 can also be a straight structure to achieve the purpose of dividing the casting liquid distribution chamber 114 into two sub-distribution chambers 1141. In addition, the baffle structure 113 can also be a polygonal structure, such as a triangle, a quadrilateral (parallelogram, square, rectangle, etc.), a pentagon, a hexagon, etc., and no specific restrictions are imposed on the structure of the baffle structure 113 and the number of the above-mentioned flow channels and spinnerets 120.

[0048] like Figure 1 、 Figure 4 and Figure 5As shown, in one embodiment, the spinneret assembly 100 further includes a first temperature sensor 130, the spinneret 110 further defines a hot runner, the spinneret 110 is provided with a liquid inlet 1171 connected to one end of the hot runner, and a liquid outlet 1172 connected to the other end of the hot runner, and the spinneret 110 is provided with a first detection port 1173 connected to the hot runner, and the first temperature sensor 130 is arranged through the first detection port 1173 for detecting the current temperature of the spinneret 110.

[0049] For the convenience of description, the liquid is hot water as an example. It can be understood that the hot water supply device can be connected to the hot water supply device through the liquid inlet 1171 and the liquid outlet 1172 respectively. The hot water supply device inputs hot water into the hot runner through the liquid inlet 1171, so that the hot water and the spinneret 110 undergo heat exchange. Then, the hot water after absorbing the cold energy flows back to the hot water supply device through the liquid outlet 1172, so as to realize the circulation heating of the spinneret 110 to play a heat preservation role. At the same time, the current temperature of the spinneret 110 is detected by the first temperature sensor 130, so as to adjust the temperature of the hot water according to the current temperature of the spinneret 110. This can effectively improve the situation where the casting liquid and the core liquid are passively cooled after flowing through the spinneret 110, resulting in flow difficulties.

[0050] like Figure 6 As shown, in one embodiment, each spinneret 120 has a spinneret 123, and a plurality of conical outlets 1174 are provided on the spinneret plate 110. The plurality of conical outlets 1174 correspond one-to-one to the spinnerets 123 of the plurality of spinnerets 120, and the cone angle of each conical outlet 1174 is α, satisfying: 60°≤α≤80°.

[0051] Exemplarily, the cone angle α of the tapered wire outlet 1174 can be selected from any value of 60°, 62°, 65°, 69°, 70°, 75°, 76°, 77°, 78°, 80° or any value in a range consisting of any two of them, without specific limitation.

[0052] In this embodiment, by controlling the cone angle α of the conical outlet 1174 within the range of 60° to 80°, a certain swing space is provided for the hollow fiber membrane ejected from the spinneret 120, thereby reducing the influence of the spinneret 110 on the spinning process, making it less likely for the hollow fiber membrane to come into contact with the spinneret 110 and break.

[0053] like Figure 6As shown, further, the spinneret assembly 100 also includes a first seal 140 and a second seal 150. At the position of each spinneret 120, the first seal 140 is arranged around the core liquid flow channel 115 and abuts between one end of the spinneret 120 and the spinneret plate 110, and the second seal 150 is arranged around the conical outlet 1174 and abuts between the outer peripheral side of the spinneret 120 and the spinneret 110.

[0054] In this embodiment, a sealed space can be formed between the spinneret 110 and the end of the spinneret 120 by the first sealing member 140, thereby reducing the risk of the core liquid leaking into the sub-distribution cavity 1141, so that it can be stably input into the spinneret 120 through the core liquid injection port 121. At the same time, a seal can be formed between the sub-distribution cavity 1141 and the tapered outlet 1174 by the second sealing member 150, thereby reducing the possibility of the casting liquid leaking from the sub-distribution cavity 1141 to the tapered outlet 1174, so that it can be stably input into the spinneret 120 through the casting liquid injection port 122, so that the casting liquid can wrap the core liquid and be ejected from the spinneret 120.

[0055] It should be noted that when the spinneret 110 includes a first plate body 111 and a second plate body 112, the tapered outlet 1174 can be opened on the side of the second plate body 112 facing away from the first plate body 111. The core liquid flow channel 115 and the casting liquid flow channel 116 can be provided on the first plate body 111, the first sealing member 140 abuts between the first plate body 111 and the end of the spinneret 120 facing the first plate body 111, and the second sealing member 150 abuts between the second plate body 112 and the outer peripheral side of the spinneret 120.

[0056] like Figure 1 、 Figure 4 and Figure 5 As shown, in the second aspect, an embodiment of the present application provides a spinning device 1000, comprising a core liquid conveying component 200, a casting film liquid conveying component 300, a filter component 400 and the spinning component 100 in any embodiment of the above-mentioned first aspect, the core liquid conveying component 200 and the casting film liquid conveying component 300 are respectively connected to one end of the filter component 400, the core liquid conveying component 200 is used to input the core liquid into the filter component 400, the casting film liquid conveying component 300 is used to input the casting film liquid into the filter component 400, and the other end of the filter component 400 is arranged on the spinneret 110, for filtering the core liquid and inputting it into the core liquid flow channel 115, and for filtering the casting film liquid and inputting it into the casting film liquid flow channel 116.

[0057] In this embodiment, a filter assembly 400 is provided between the conveying assembly and the spinneret 110. The filter assembly 400 can filter the core liquid and input it into the core liquid flow channel 115. At the same time, it can filter the casting liquid and input it into the casting liquid flow channel 116. The solid impurity content of the filtered core liquid and casting liquid is significantly reduced, thereby reducing the risk of clogging of the spinneret 120.

[0058] like Figure 4 、 Figure 5 and Figure 7 As shown, in one embodiment, the filter assembly 400 includes a filter chamber 410, a core liquid filter element 420, a casting film liquid filter element 430 and an adapter 440. The adapter 440 is connected between the filter chamber 410 and the spinneret 110, and defines a core liquid filter outflow channel 441 and a casting film liquid filter outflow channel 442. Each core liquid flow channel 115 is connected to the core liquid filter outflow channel 441, and each casting film liquid flow channel 116 is connected to the casting film liquid filter outflow channel 442. The filter chamber 410 defines a core liquid filter cavity 411 and a casting film liquid filter cavity 412. The core liquid conveying assembly 200 and the casting film liquid conveying assembly 300 are respectively connected to the filter chamber 410. The core liquid filter element 420 is disposed in the core liquid filter cavity 411, and the casting film liquid filter element 430 is disposed in the casting film liquid filter cavity 412. In this way, the core liquid can be filtered through the core liquid filter element 420 and the core liquid filter cavity 411 to remove solid impurities in the core liquid, and the casting liquid membrane can be filtered through the casting liquid filter element 430 and the casting liquid filter cavity 412 to remove solid impurities in the casting liquid.

[0059] like Figure 4 、 Figure 5 and Figure 7 As shown, further, the core liquid filter element 420 is respectively arranged in the core liquid filter cavity 411 and the core liquid filter outflow channel 441, and there is a gap between the core liquid filter element 420 and the side wall of the core liquid filter cavity 411, and the core liquid filter element 420 is sealed and fitted with the inner wall of the core liquid filter outflow channel 441, and the casting film liquid filter element 430 is respectively arranged in the casting film liquid filter cavity 412 and the casting film liquid filter outflow channel 442, and there is a gap between the casting film liquid filter element 430 and the side wall of the casting film liquid filter cavity 412, and the casting film liquid filter element 430 is sealed and fitted with the inner wall of the casting film liquid filter outflow channel 442.

[0060] For the convenience of description, the core liquid conveying component 200 and the casting film liquid conveying component 300 are collectively referred to as the conveying component, the casting film liquid and the core liquid are collectively referred to as the material liquid, the core liquid filter chamber 411 and the casting film liquid filter chamber 412 are collectively referred to as the filter chamber, the core liquid filter outflow channel 441 and the casting film liquid filter outflow channel 442 are collectively referred to as the filter outflow channel, and the core liquid filter element 420 and the casting film liquid filter element 430 are collectively referred to as the filter element.

[0061] In this embodiment, since there is a gap between the filter element and the side wall of the filter cavity, the feed liquid input into the filter cavity from the conveying component can smoothly enter the filter element and the pressure is the same everywhere. At the same time, since the filter element is sealed and fits with the inner wall of the filter outlet channel, all the feed liquid is input into the spinneret 110 after external pressure filtration, so that solid impurities are blocked outside the filter element.

[0062] For example, a seal may be provided around the outer circumference of the filter element to achieve a sealed fit between the filter element and the inner wall of the filter outlet channel. Of course, an interference fit may also be used to achieve the same sealing effect.

[0063] like Figure 4 、 Figure 5 and Figure 7 As shown, further, the adapter 440 and the spinneret 110 jointly define a casting liquid distribution channel 443, a first core liquid distribution channel 444 and a second core liquid distribution channel 445. The casting liquid distribution channel 443 is connected to the casting liquid filtration channel 442, and each casting liquid channel 116 is connected to the casting liquid distribution channel 443. The first core liquid distribution channel 444 and the second core liquid distribution channel 445 are respectively connected to the core liquid filtration channel 441. One part of the multiple core liquid flow channels 115 is connected to the first core liquid distribution channel 444, and another part of the multiple core liquid flow channels 115 is connected to the second core liquid distribution channel 445.

[0064] In this embodiment, since the casting liquid distribution channel 443 is connected to the casting liquid filtration channel 442, each casting liquid channel 116 is connected to the casting liquid distribution channel 443, so that the filtered casting liquid is evenly distributed to multiple sub-distribution chambers 1141, making the pressure of the casting liquid more stable. Since the first core liquid distribution channel 444 and the second core liquid distribution channel 445 are respectively connected to the core liquid filtration channel 441, a portion of the core liquid channels 115 in the multiple core liquid channels 115 are respectively connected to the first core liquid distribution channel 444, and another portion of the core liquid channels 115 in the multiple core liquid channels 115 are respectively connected to the second core liquid distribution channel 445. In this way, the filtered core liquid is evenly distributed to multiple spinnerets 120, making the pressure of the core liquid more stable. As a result, the spinning quality of the spinneret 120 is improved, thereby improving the quality of the finished hollow fiber membrane.

[0065] like Figure 1 and Figure 2As shown, in one embodiment, the core liquid delivery component 200 includes a first core liquid delivery tube 210, a second core liquid delivery tube 220 and a second temperature sensor 230. The second core liquid delivery tube 220 is connected to the filter component 400, the first core liquid delivery tube 210 is connected to the outer peripheral side of the second core liquid delivery tube 220, and a second detection port 221 is opened on the second core liquid delivery tube 220. The second temperature sensor 230 is arranged through the second detection port 221 for detecting the current temperature of the core liquid in the second core liquid delivery tube 220.

[0066] In this embodiment, the first core liquid delivery tube 210 facilitates docking with the core liquid feed channel of the previous process to enable the core liquid to be fed into the spinning device 1000. The second temperature sensor 230 can detect the current temperature of the core liquid flowing from the first core liquid delivery tube 210 into the second core liquid delivery tube 220, thereby monitoring the temperature fluctuation of the core liquid, so as to timely regulate the temperature of the core liquid to maintain optimal flow properties of the core liquid.

[0067] like Figure 2 As shown, further, the second detection port 221 is located at one end of the second core liquid delivery tube 220 away from the filter assembly 400, and the first core liquid delivery tube 210 is arranged close to the second detection port 221, which can improve the detection accuracy of the second temperature sensor 230 so as to more accurately regulate the temperature of the core liquid.

[0068] like Figure 1 and Figure 2 As shown, in one embodiment, the casting liquid conveying component 300 includes a first casting liquid conveying pipe 310, a second casting liquid conveying pipe 320 and a third temperature sensor 330. The second casting liquid conveying pipe 320 is connected to the filter component 400, the first casting liquid conveying pipe 310 is connected to the outer peripheral side of the second casting liquid conveying pipe 320, and a third detection port 321 is provided on the second casting liquid conveying pipe 320. The third temperature sensor 330 is arranged through the third detection port 321 for detecting the current temperature of the casting liquid in the second casting liquid conveying pipe 320.

[0069] In this embodiment, the provision of the first casting liquid delivery pipe 310 facilitates docking with the casting liquid feed channel of the previous process to enable the casting liquid to be fed into the spinneret 1000. The third temperature sensor 330 can detect the current temperature of the casting liquid flowing from the first casting liquid delivery pipe 310 into the second casting liquid delivery pipe 320, thereby monitoring the temperature fluctuation of the casting liquid, so as to timely regulate the temperature of the casting liquid to maintain optimal flow properties.

[0070] like Figure 2As shown, further, the third detection port 321 is located at one end of the second casting liquid delivery pipe 320 away from the filter assembly 400, and the first casting liquid delivery pipe 310 is arranged close to the second detection port 221, so as to improve the detection accuracy of the third temperature sensor 330 so as to more accurately regulate the temperature of the casting liquid.

[0071] It should be noted that the above two embodiments can be combined, that is, the first core liquid delivery pipe 210, the second core liquid delivery pipe 220, the second temperature sensor 230, the first casting liquid delivery pipe 310, the second casting liquid delivery pipe 320 and the third temperature sensor 330 are set at the same time, so as to monitor the temperature fluctuations of the core liquid and the casting liquid at the same time, which will not be repeated here.

[0072] It should be understood that since the spinning device 1000 provided in this embodiment has the spinning assembly 100 in any embodiment of the first aspect above, it has all the beneficial effects of the spinning assembly 100, which will not be described in detail here.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A spinning assembly, characterized in that include: A spinneret (110) defines a casting liquid distribution chamber (114), wherein a baffle structure (113) is provided in the casting liquid distribution chamber (114), and the baffle structure (113) divides the casting liquid distribution chamber (114) into a plurality of sub-distribution chambers (1141); A spinneret (120) is provided with a core liquid injection port (121) at one end, and a casting liquid injection port (122) is provided on the outer peripheral side of the spinneret (120); In each of the sub-distribution chambers (1141), a plurality of spinnerets (120) are provided, and the spinneret (110) further defines a plurality of core liquid flow channels (115) and a plurality of casting liquid flow channels (116). The plurality of core liquid flow channels (115) are connected one-to-one with the core liquid injection ports (121) of the plurality of spinnerets (120), each of the casting liquid flow channels (116) is connected with the sub-distribution chamber (1141), and the casting liquid injection port (122) of each of the spinnerets (120) is connected with the sub-distribution chamber (1141).

2. The spinning assembly according to claim 1, characterized in that The spinneret (110) includes a first plate body (111) and a second plate body (112) connected to each other, wherein the first plate body (111) is provided with a plurality of grooves on one side facing the second plate body (112), and a barrier portion (1131) is provided between each two adjacent grooves, and the plurality of barrier portions (1131) constitute the barrier structure (113), and the second plate body (112) is used to close the plurality of grooves to form a plurality of sub-distribution chambers (1141).

3. The spinning assembly according to claim 2, characterized in that The baffle structure (113) is a cross structure, and the cross structure divides the casting liquid distribution chamber (114) into four sub-distribution chambers (1141).

4. The spinning assembly according to any one of claims 1 to 3, characterized in that The spinneret assembly further includes a first temperature sensor (130), and the spinneret (110) further defines a hot runner. The spinneret (110) is provided with a liquid inlet (1171) connected to one end of the hot runner, and a liquid outlet (1172) connected to the other end of the hot runner, and the spinneret (110) is provided with a first detection port (1173) connected to the hot runner. The first temperature sensor (130) is arranged through the first detection port (1173) for detecting the current temperature of the spinneret (110).

5. The spinning assembly according to any one of claims 1 to 3, characterized in that Each of the spinnerets (120) has a spinneret (123), and a plurality of conical outlets (1174) are provided on the spinneret plate (110). The plurality of conical outlets (1174) correspond one-to-one to the spinnerets (123) of the plurality of spinnerets (120), and the cone angle of each conical outlet (1174) is α, satisfying the following: 60°≤α≤80°.

6. A spinning device, characterized in that It comprises a core liquid conveying component (200), a casting liquid conveying component (300), a filter component (400) and a spinning component according to any one of claims 1 to 5, wherein the core liquid conveying component (200) and the casting liquid conveying component (300) are respectively connected to one end of the filter component (400), the core liquid conveying component (200) is used to input the core liquid into the filter component (400), the casting liquid conveying component (300) is used to input the casting liquid into the filter component (400), and the other end of the filter component (400) is arranged on the spinneret (110) for filtering the core liquid and inputting it into the core liquid flow channel (115), and for filtering the casting liquid and inputting it into the casting liquid flow channel (116).

7. The spinning device according to claim 6, characterized in that The filter assembly (400) includes a filter chamber (410), a core liquid filter element (420), a casting film liquid filter element (430) and an adapter (440). The adapter (440) is connected between the filter chamber (410) and the spinneret (110), and defines a core liquid filter outflow channel (441) and a casting film liquid filter outflow channel (442). The filter chamber (410) defines a core liquid filter cavity (411) and a casting film liquid filter cavity (412). The core liquid conveying assembly (200) and the casting film liquid conveying assembly (300) are respectively connected to the filter chamber (410). The core liquid filter element (420) is arranged in the core liquid filter cavity (411), and the casting film liquid filter element (430) is arranged in the casting film liquid filter cavity (412).

8. The spinning device according to claim 7, characterized in that The adapter (440) and the spinneret (110) jointly define a casting liquid distribution channel (443), a first core liquid distribution channel (444) and a second core liquid distribution channel (445), wherein the casting liquid distribution channel (443) is connected to the casting liquid filtration channel (442), and each of the casting liquid channels (116) is connected to the casting liquid distribution channel (443), and the first core liquid distribution channel (444) and the second core liquid distribution channel (445) are respectively connected to the core liquid filtration channel (441), wherein a part of the core liquid channel (115) is connected to the first core liquid distribution channel (444), and another part of the core liquid channel (115) is connected to the second core liquid distribution channel (445).

9. The spinning device according to claim 6, characterized in that The core liquid delivery component (200) includes a first core liquid delivery tube (210), a second core liquid delivery tube (220) and a second temperature sensor (230), wherein the second core liquid delivery tube (220) is connected to the filter component (400), the first core liquid delivery tube (210) is connected to the outer peripheral side of the second core liquid delivery tube (220), and the second core liquid delivery tube (220) is provided with a second detection port (221), and the second temperature sensor (230) is arranged through the second detection port (221) for detecting the current temperature of the core liquid in the second core liquid delivery tube (220).

10. The spinning device according to claim 6, characterized in that The casting liquid conveying component (300) includes a first casting liquid conveying pipe (310), a second casting liquid conveying pipe (320) and a third temperature sensor (330), wherein the second casting liquid conveying pipe (320) is connected to the filter component (400), the first casting liquid conveying pipe (310) is connected to the outer peripheral side of the second casting liquid conveying pipe (320), and the second casting liquid conveying pipe (320) is provided with a third detection port (321), and the third temperature sensor (330) is arranged through the third detection port (321) for detecting the current temperature of the casting liquid in the second casting liquid conveying pipe (320).

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