Extraction device and fiber production device

Abstract

The utility model relates to the field of fiber production, and discloses an extraction device and a fiber production device.The extraction device comprises an extraction box and a suction structure, the extraction box is used for containing an extraction agent and comprises a body part and a silk feeding part which communicate with each other, and the silk feeding part is arranged on the body part in a protruding mode in the first direction; the wire feeding part comprises a sealing layer, a buffer layer and a wire inlet which are arranged in a layered mode in the first direction; the suction structure is at least partially contained in the buffer layer, the length direction of the suction structure intersects with the first direction, and the suction structure is used for sucking the extraction agent in the gas state. And unorganized emission caused by extraction agent volatilization can be reduced.

Description

Technical Field

[0001] This application belongs to the field of fiber production, and particularly relates to an extraction device and a fiber production device. Background Technology

[0002] In the fiber production industry, extraction equipment is one of the key pieces of equipment, and its performance directly affects the quality of fiber products and production efficiency. Currently, traditional extraction equipment suffers from insufficient sealing and inadequate temperature control systems during fiber extraction, leading to the easy volatilization of the extractant during high-temperature seasons and resulting in fugitive emissions. This not only wastes the extractant and increases production costs but also pollutes the production environment, endangers the health of operators, and even poses safety hazards. Utility Model Content

[0003] This application provides an extraction device and a fiber production device that can reduce the volatilization of the extractant and the resulting fugitive emissions.

[0004] On one hand, embodiments of this application provide an extraction device, including an extraction chamber and a suction structure. The extraction chamber is used to contain an extractant. The extraction chamber includes a body part and a fiber insertion part that are connected. The fiber insertion part protrudes from the body part along a first direction and includes a sealing layer, a buffer layer, and a fiber inlet that are layered along the first direction. The suction structure is at least partially contained in the buffer layer, and the length direction of the suction structure intersects with the first direction for suctioning gaseous extractant.

[0005] In some embodiments of this application, the yarn inlet includes a mounting plate, a support plate, and a cover plate. The support plate and the cover plate are rotatably connected. The cover plate and the mounting plate define the yarn inlet. Along a second direction, the cover plate and the support plate are located on one side of the yarn inlet, and the mounting plate is located on the other side of the yarn inlet. One end of the support plate facing away from the cover plate is connected to the main body. The first direction is perpendicular to the second direction.

[0006] In some embodiments of this application, the suction structure is mounted on the cover plate.

[0007] In some embodiments of this application, the cover plate includes a first plate segment and a second plate segment connected at an angle, the first plate segment being rotatably connected to the support plate, and the second plate segment defining the inlet of the yarn with the mounting plate; the suction structure is connected to the first plate segment and the second plate segment.

[0008] In some embodiments of this application, the first plate segment is located on the extension path of the support plate itself, and the mounting plate includes a third plate segment and a fourth plate segment connected together. The third plate segment extends along a first direction, and the fourth plate segment extends along a second direction. The first direction is perpendicular to the second direction. The fourth plate segment is opposite to and spaced apart from the second plate segment to form the wire inlet.

[0009] In some embodiments of this application, along the first direction, the wire inlet is opposite to the body portion; the distance between the support plate and the mounting plate tends to gradually decrease from the body portion toward the wire inlet.

[0010] In some embodiments of this application, the inlet extends along a third direction and is opened at the inlet portion; the suction structure includes a first tube extending along the third direction, the first tube having a plurality of first suction ports along the third direction, at least a portion of the plurality of first suction ports being located on the side of the first tube away from the cover plate.

[0011] In some embodiments of this application, the plurality of first suction ports are opened at equal angles along the circumference of the first tube.

[0012] In some embodiments of this application, the suction structure further includes a second tube extending along the third direction, the second tube being mounted on the mounting plate, and the second tube having a plurality of second suction ports along the third direction, at least a portion of the plurality of second suction ports being located on the side of the second tube away from the mounting plate.

[0013] On the other hand, embodiments of this application also provide a fiber production apparatus, including the extraction apparatus described above.

[0014] The extraction apparatus and fiber production apparatus of this application embodiment are configured by layering a sealing layer, a buffer layer, and an inlet in the fiber feed section, and by incorporating a suction structure within the buffer layer. The sealing layer effectively prevents leakage of the liquid extractant, reducing the source of volatilization; the suction structure uses negative pressure to draw in the gaseous extractant, reducing the gas concentration in the inlet area, and effectively suppressing the fugitive emission of dichloromethane, especially when the ambient temperature rises, thus meeting environmental protection requirements. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the extraction apparatus of some embodiments of this application;

[0017] Figure 2 Show Figure 1 A top view, where the dashed lines represent the internal suction structure;

[0018] Figure 3 An example is shown. Figure 1 A magnified view of a portion of region A in the middle;

[0019] Figure 4 Show Figure 3 A schematic diagram of the middle cover plate in the open position;

[0020] Figure 5 Another example is shown Figure 1 A magnified view of a portion of region A in the middle;

[0021] Figure 6 Show Figure 3 A schematic diagram of the structure of the first tube in the process.

[0022] Figure label:

[0023] 100. Extraction box; 101. Extractant; 102. Sealing layer; 103. Buffer layer; 110. Main body; 111. Yarn outlet; 120. Yarn inlet; 121. Yarn inlet; 122. Support plate; 123. Cover plate; 123a. First plate segment; 123b. Second plate segment; 124. Mounting plate; 124a. Third plate segment; 124b. Fourth plate segment;

[0024] 200, suction structure; 201, first tube body; 202, second tube body; 203, first suction port; X, second direction; Y, third direction; Z, first direction. Detailed Implementation

[0025] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0031] In the description of the embodiments in this application, the technical terms "center," "longitudinal," and "lateral" are used.

[0032] Length, Width, Thickness, Top, Bottom, Front, Back, Left, Right

[0033] "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise"

[0034] The orientation or positional relationship indicated by "axial", "radial", "circumferential", etc., is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating the description of the embodiments of this application and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0035] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] Taking the production process of ultra-high molecular weight polyethylene (UHMWPE) fiber as an example, the production process of UHMWPE fiber typically includes the following key steps:

[0037] 1. Polymerization Reaction: First, UHMWPE is synthesized through free radical polymerization. This process typically involves using chain initiators, such as peroxides, under high temperature and pressure to polymerize ethylene monomers into high molecular weight chains. Because UHMWPE has a very high molecular weight, traditional low-density polyethylene processes are difficult to implement; therefore, special polymerization methods, such as slurry polymerization or solution polymerization, are usually employed.

[0038] 2. Dissolution and Spinning: The polymerized UHMWPE needs to be dissolved in a suitable solvent, such as dichloromethane or decahydronaphthalene. The dissolved polymer solution is then fed into a spinning system and extruded through a spinneret under high temperature and pressure to form long, thin fibers.

[0039] 3. Extraction and Washing: The extruded fibers enter one or more extraction tanks, where the solvent is removed. This step is crucial for fiber quality as it determines the fiber's crystallinity and mechanical properties. When dichloromethane is used as the extractant, its volatility necessitates a robust recovery and treatment system to prevent environmental pollution.

[0040] 4. Drying: The extracted fibers need to be dried to remove residual moisture and other volatile solvents, ensuring that the fibers do not change in performance during subsequent processing.

[0041] 5. Stretching and Heat Setting: The dried fibers undergo further stretching and heat setting to optimize their mechanical properties, such as strength and modulus. This step can be accomplished through multi-stage stretching, with each stage performed at a different temperature to gradually achieve the desired properties.

[0042] 6. Winding and Packaging: Finally, the fibers are wound into rolls and then packaged for transport and storage.

[0043] Extraction is a crucial step in the production of ultra-high molecular weight polyethylene (UHMWPE) fibers, and dichloromethane is commonly used as the extractant. While dichloromethane is an excellent extractant, its drawbacks include a low boiling point and high volatility. With increasingly stringent environmental regulations, the requirements for fugitive dichloromethane emissions are becoming more stringent. Therefore, reducing fugitive dichloromethane emissions during UHMWPE fiber production has become a more critical challenge.

[0044] In winter, when temperatures are low, existing extraction devices can control the concentration of fugitive dichloromethane emissions to a low level. However, as ambient temperatures rise, especially in summer when they approach or even exceed the boiling point of dichloromethane, the concentration of fugitive dichloromethane emissions at the inlet continuously increases, causing environmental pollution.

[0045] In view of this, embodiments of this application provide an extraction device and a fiber production device. By setting a suction structure in the buffer layer near the yarn inlet of the extraction box, the extractant that volatilizes to the buffer layer is promptly drawn and collected, reducing the concentration of extractant that is discharged unorganizedly from the yarn inlet, thereby reducing environmental pollution.

[0046] like Figures 1 to 6 As shown, some embodiments of this application provide an extraction apparatus, including an extraction chamber 100 and a suction structure 200. The extraction chamber 100 is used to contain an extractant 101. The extraction chamber 100 includes a body portion 110 and a fiber inlet portion 120 that are connected to each other. The fiber inlet portion 120 is protruding from the body portion 110 along a first direction Z. The fiber inlet portion 120 includes a sealing layer 102, a buffer layer 103 and a fiber inlet 121 that are layered along the first direction Z. The suction structure 200 is at least partially contained in the buffer layer 103, and the length direction of the suction structure 200 is intersected with the first direction Z for suctioning the gaseous extractant 101.

[0047] In this embodiment, the first direction Z is a vertical direction; for example, the first direction Z is the height direction of the extraction box 100. The second direction X is a horizontal direction and is perpendicular to the first direction Z; for example, the second direction X is the width direction of the extraction box 100. The third direction Y is another horizontal direction and is perpendicular to both the first direction Z and the second direction X; for example, the third direction Y is the length direction of the extraction box 100, which is also the length direction of the suction structure 200, i.e., the extension direction.

[0048] The extraction chamber 100 is the main container for fiber extraction, used to hold the extractant 101 and provide space for fiber introduction and extraction processes.

[0049] In some examples, the extractant 101 can be dichloromethane, acetone, etc.

[0050] The extraction chamber 100 includes a main body 110 and a fiber inlet 120. The main body 110 is the primary area for containing the extractant 101, and its large size provides a sufficient liquid environment for fiber extraction. The fiber inlet 120 is the entrance area for the fiber to enter the extraction chamber 100. Exemplarily, the fiber inlet 120 protrudes along a first direction Z from the top of the main body 110, facilitating the introduction of the fiber into the extraction chamber 100 from above.

[0051] In some examples, the fiber inlet 120 is located on one side of the extraction chamber 100 along the second direction X, and the fiber inlet 120 extends along the third direction Y.

[0052] In another example, the extraction chamber 100 also includes a filament outlet 111, which is disposed opposite to the filament inlet 120 along a second direction X. As an example, the filament outlet 111 and the filament inlet 120 are located on the same side of the body portion 110.

[0053] For example, the filament outlet 111 is a strip-shaped opening along the third direction Y on the body portion 110.

[0054] The yarn inlet 120 is provided with a sealing layer 102, a buffer layer 103, and a yarn inlet 121 arranged sequentially from bottom to top along the first direction Z. The sealing layer 102 is located at the bottom of the yarn inlet 120 and is in direct contact with the extractant 101 of the body part 110. Its function is to reduce leakage of the extractant 101 from the connection between the yarn inlet 120 and the body part 110. As an example, the sealing layer 102 is a liquid layer.

[0055] The buffer layer 103 is disposed above the sealing layer 102 and serves as the intermediate layer of the wire insertion part 120. The buffer layer 103 is an air layer used to accommodate the suction structure 200.

[0056] The fiber inlet 121 is located at the top of the fiber inlet 120 and serves as the channel for the fiber to enter the extraction chamber 100. For example, the fiber inlet 121 can be circular, strip-shaped, or similar. The size of the fiber inlet 121 is designed according to the diameter of the fiber bundle. As an example, the width of the fiber inlet 121 along the second direction X is slightly larger than the outer diameter of the fiber bundle to ensure that the fiber can pass through smoothly, while minimizing the opening area of ​​the fiber inlet 121 to reduce the evaporation of the extractant 101.

[0057] The suction structure 200 reduces the concentration of the gaseous extractant 101 at locations such as the inlet 121 by suctioning it. The suction structure 200 is at least partially housed within the buffer layer 103, and its length direction intersects the first direction Z. In this embodiment, the suction structure 200 is arranged along the third direction Y to facilitate the complete suction of the gaseous extractant 101 at the inlet 121 extending along the third direction Y.

[0058] In one example, the suction structure 200 generates negative pressure via an external vacuum pump or negative pressure source, transporting the gaseous extractant 101 within the buffer layer 103 through pipelines to a subsequent recovery and treatment system, thereby reducing the fugitive emission of the gaseous extractant 101 from the inlet 121 into the external environment. The suction capacity of the suction structure 200 can be adjusted according to production scale and ambient temperature; for example, the suction power can be increased during high temperatures in summer to cope with higher volatilization rates.

[0059] In this embodiment, a triple protection system of "sealing-buffering-suction" is formed by layering a sealing layer 102, a buffer layer 103, and an inlet 121 in the yarn inlet 120, and by setting a suction structure 200 within the buffer layer 103. The sealing layer 102 effectively prevents leakage of the liquid extractant 101, reducing the source of volatilization from the outset; the suction structure 200 reduces the gas concentration in the inlet 121 area by suctioning the gaseous extractant 101 under negative pressure, and can effectively suppress the fugitive emission of dichloromethane, especially when the ambient temperature rises, thus meeting environmental protection requirements.

[0060] In one embodiment of this application, the yarn inlet 120 includes a mounting plate 124, a support plate 122, and a cover plate 123. The support plate 122 and the cover plate 123 are rotatably connected. The cover plate 123 and the mounting plate 124 define a yarn inlet 121. Along the second direction X, the cover plate 123 and the support plate 122 are located on one side of the yarn inlet 121, and the mounting plate 124 is located on the other side of the yarn inlet 121. One end of the support plate 122 facing away from the cover plate 123 is connected to the body portion 110, wherein the first direction Z is perpendicular to the second direction X.

[0061] For example, the support plate 122 and the cover plate 123 can be connected by rotatable connectors such as hinges and pins, allowing the cover plate 123 to rotate relative to the support plate 122 about a rotation axis, thereby enabling the cover plate 123 to open and close. The rotatable connection between the support plate 122 and the cover plate 123 facilitates the installation and adjustment of the internal structure of the extraction chamber 100. For instance, when replacing fiber bundles or performing equipment maintenance, the cover plate 123 can be opened for convenient operation.

[0062] In one example, along the second direction X, the cover plate 123 and the support plate 122 are located on one side (e.g., the left side) of the wire inlet 121, and the mounting plate 124 is located on the other side (e.g., the right side) of the wire inlet 121. The three together form a narrow channel as the wire inlet 121.

[0063] As an example, the mounting plate 124 is fixed to the top of the body part 110, one end of the support plate 122 is connected to the body part 110, and the other end is rotatably connected to the cover plate 123. When the cover plate 123 rotates around the rotation axis, the distance between it and the mounting plate 124 changes. At this time, the wire inlet 121 increases and is used as an inspection port.

[0064] In another example, the wire insertion section 120 also includes two side plates disposed opposite each other along a third direction Y, the two side plates being connected between the mounting plate 124 and the support plate 122 along a second direction X.

[0065] For example, the support plate 122 is fixedly connected to the top of the body part 110 by means of welding, bolting or other methods to the back of the cover plate 123, thereby ensuring the stability of the support plate 122 and providing reliable support for the cover plate 123 and the mounting plate 124.

[0066] In some examples, the mounting plate 124, support plate 122, and cover plate 123 are all made of materials resistant to dichloromethane corrosion, such as 316L stainless steel or polyvinyl chloride (PVC). The support plate 122 and mounting plate 124 need to have high strength to withstand the weight of the cover plate 123 and the installation load of the suction structure 200, and their thickness is typically 5-10 mm. The cover plate 123 can be appropriately thinned to reduce weight and facilitate rotation; its thickness is typically 3-5 mm.

[0067] By setting a rotatable support plate 122 and cover plate 123, and a fixed mounting plate 124, an adjustable fiber inlet 121 is formed. The rotatable cover plate 123 facilitates fiber installation and equipment maintenance, and improves the ease of operation.

[0068] In some embodiments, the sealing layer 102 comprises a liquid, and the sealing layer 102 and the extractant 101 are disposed in layers, with the extractant 101 being at least partially located within the body portion 110.

[0069] The sealing layer 102 is a liquid that is immiscible with the extractant 101 and has a different density. Through the layered arrangement of the liquid sealing layer 102 and the extractant 101, a physical isolation barrier is formed.

[0070] For example, the extractant 101 is dichloromethane, and the sealing layer 102 can be water, silicone oil (such as polydimethylsiloxane), etc. As an example, water is immiscible with dichloromethane and has a lower density than dichloromethane, so it can float above the dichloromethane liquid surface to form a stable stratification.

[0071] The boiling point of the liquid sealing layer 102 is significantly higher than that of dichloromethane, and its own volatilization is negligible, thus avoiding the introduction of new volatile pollutants. For example, the boiling point of water is 100℃, which is much higher than the boiling point of dichloromethane at 39.8℃.

[0072] In some examples, the sealing layer 102 is located below the junction of the support plate 122 and the cover plate 123 along the first direction Z, to prevent liquid from leaking from the gap between the support plate 122 and the cover plate 123.

[0073] Furthermore, in an optional embodiment of this application, the suction structure 200 is mounted on the cover plate 123.

[0074] For example, the suction structure 200 can be fixed to the surface of the cover plate 123 by fasteners such as bolts and clips. Since the cover plate 123 is located on one side of the inlet 121 (such as the left side) and adjacent to the buffer layer 103, installing the suction structure 200 on the cover plate 123 allows the suction structure 200 to be close to the inlet 121, shortening the flow path of the gaseous extractant 101 and improving the suction efficiency.

[0075] The cover plate 123 can rotate relative to the support plate 122 to open. The suction structure 200, installed on the cover plate 123, can rotate with the cover plate 123, exposing the suction structure 200 to the outside, thereby facilitating the installation and maintenance of the suction structure 200. Furthermore, by installing the suction structure 200 on the cover plate 123, during use, the suction structure 200 is positioned close to the yarn inlet 121 to improve suction efficiency. Also, when maintaining the interior of the extraction chamber 100, the cover plate 123 moves the suction structure 200 out of the chamber of the extraction chamber 100, avoiding the maintenance location and facilitating maintenance.

[0076] In addition, in one embodiment of this application, the cover plate 123 includes a first plate segment 123a and a second plate segment 123b connected at an angle. The first plate segment 123a is rotatably connected to the support plate 122, and the second plate segment 123b and the mounting plate 124 define the thread inlet 121. The suction structure 200 is connected to the first plate segment 123a and the second plate segment 123b.

[0077] For example, the included angle A between the first plate segment 123a and the second plate segment 123b ranges from 90° to 150°, forming an L-shaped structure. As an example, A is a range consisting of one or two of 90°, 100°, 110°, 120°, 130°, 140°, and 150°.

[0078] In one example, the first plate segment 123a and the second plate segment 123b can be integrally formed or connected separately. As an example, the end of the first plate segment 123a away from the second plate segment 123b is rotatably connected to the support plate 122.

[0079] For example, the first plate segment 123a and the support plate 122 are connected by a rotatable connector such as a hinge or a pin. As an example, the included angle B between the first plate segment 123a and the support plate 122 can be equal to or less than 180 degrees.

[0080] In some examples, the suction structure 200 is a single component that is connected to both the first plate segment 123a and the second plate segment 123b, i.e., the suction structure 200 is connected at the angle between the first plate segment 123a and the second plate segment 123b.

[0081] In other examples, the suction structure 200 comprises multiple components, some of which are connected to the first plate segment 123a and others to the second plate segment 123b. As an example, the suction structure 200 includes multiple suction nozzles extending in a third direction Y, with some of the nozzles mounted on the first plate segment 123a and others connected to the second plate segment 123b.

[0082] In the embodiments of this application, the first plate segment 123a and the second plate segment 123b connected at an angle can increase the width of the buffer layer 103 while reducing the size of the inlet 121, thereby facilitating the installation of the suction structure 200 and the internal maintenance of the extraction box 100, and reducing the evaporation area of ​​the inlet 121 and the evaporation concentration of the extractant 101.

[0083] In some embodiments of this application, the first plate segment 123a is located on the extension path of the support plate 122 itself; the mounting plate 124 includes a connected third plate segment 124a and a fourth plate segment 124b, the third plate segment 124a extends along a first direction Z, and the fourth plate segment 124b extends along a second direction X, the first direction Z being perpendicular to the second direction X; the fourth plate segment 124b is opposite to and spaced apart from the second plate segment 123b to form a wire inlet 121.

[0084] In one example, the support plate 122 may be parallel to, at an acute angle to, or at an obtuse angle to the first direction Z. The first plate segment 123a is located on the extension path of the support plate 122 itself, such that the extension trend of the first plate segment 123a is consistent with that of the support plate 122, that is, the angle between the first plate segment 123a and the first direction Z is the same as the angle between the support plate 122 and the first direction Z.

[0085] For example, the second plate segment 123b extends along the second direction X, and the second plate segment 123b may be parallel to the second direction X or have an angle with the second direction X.

[0086] The third plate segment 124a extends along the first direction Z. One end of the third plate segment 124a is fixedly connected to the top of the main body 110, and the other end is connected to the fourth plate segment 124b. The height of the third plate segment 124a matches the height of the wire insertion part 120, and is used to support the fourth plate segment 124b and adjust the vertical position of the wire insertion port 121. The height of the third plate segment 124a is the length of the third plate segment 124a along the first direction Z.

[0087] The fourth segment 124b extends along the second direction X, extending from the end of the third segment 124a toward the inlet 121. The length of the fourth segment 124b is adapted to the length of the second segment 123b. The fourth segment 124b and the second segment 123b are positioned opposite each other and spaced apart. The horizontal gap between them is the inlet 121, through which the fiber bundle enters the extractant 101 in the body section 110.

[0088] Furthermore, in some embodiments of this application, along the first direction Z, the wire inlet 121 is opposite to the body portion 110; the distance between the support plate 122 and the mounting plate 124 tends to gradually decrease from the body portion 110 toward the wire inlet 121.

[0089] The fiber inlet 121 is located directly above the body part 110, allowing the fiber to enter the extractant 101 of the body part 110 vertically or nearly vertically, ensuring that the fiber bundle is subjected to uniform force during the extraction process and avoiding uneven extraction caused by tilting.

[0090] In some examples, the mounting plate 124 is vertically arranged, and the end of the support plate 122 away from the body portion 110 tends to tilt towards the mounting plate 124; alternatively, the ends of the support plate 122 and the mounting plate 124 away from the body portion 110 tend to move closer to each other. The gradually decreasing distance between the support plate 122 and the mounting plate 124 reduces the opening area at the inlet 121, thereby reducing the volatilization of the extractant 101.

[0091] The gradually decreasing distance between the support plate 122 and the mounting plate 124 can guide the gaseous extractant 101 toward the suction structure 200, making it easier for the suction structure 200 to draw in the gas.

[0092] In some embodiments of this application, the inlet 121 extends along the third direction Y and is opened in the inlet portion 120; the suction structure 200 includes a first tube 201 extending along the third direction Y, the first tube 201 having a plurality of first suction ports 203 along the third direction Y, at least part of the plurality of first suction ports 203 being located on the side of the first tube 201 away from the cover plate 123.

[0093] For example, the wire inlet 121 has a rectangular, zigzag, or wavy shape along the third direction Y.

[0094] The first tube 201 can be a cylindrical tube or a prismatic tube. As an example, the material of the first tube 201 can be 316L stainless steel, polyvinyl chloride (PVC), etc.

[0095] The first pipe body 201 can be one or more segments. The two ends of the first pipe body 201 along the third direction Y can be blocked or opened.

[0096] For example, the plurality of first suction ports 203 may be arranged in a straight line, a curved line, or a discrete arrangement along the third direction Y on the first tube body 201.

[0097] Multiple first suction ports 203 may be partially or entirely oriented toward the side away from the cover plate 123, and the side of the first tube 201 closest to the cover plate 123 is connected to the cover plate 123 to improve suction efficiency. For example, the first suction ports 203 may be oriented toward one or more of the thread inlet 121, the mounting plate 124, and the sealing layer 102.

[0098] For example, the shape of the first suction port 203 can be circular, rectangular, or elongated, etc.

[0099] In this embodiment, the suction structure 200 adopts a first tube 201 and a first suction port 203 structure, which facilitates the installation of the suction structure 200, has a lower cost than multiple suction nozzles, and has a better suction effect.

[0100] In some embodiments of this application, a plurality of first suction ports 203 are opened at equal angles along the circumference of the first tube 201.

[0101] Multiple first suction ports 203 are opened at equal angles along the circumference of the first tube 201. As an example, two adjacent first suction ports 203 are opened at intervals of 45° or 60°, so that the first suction ports 203 are evenly distributed in the circumferential direction of the tube. This ensures that the first tube 201 has a uniform suction capacity in the entire circumferential direction and avoids airflow imbalance caused by the first suction ports 203 being concentrated in a certain area.

[0102] The first suction port 203, which is circumferentially distributed at equal angles, ensures the uniformity of airflow and avoids suction blind spots. Especially when the inlet port 121 has a long length along the third direction Y, it can effectively control the emission concentration over the entire width range.

[0103] In one embodiment of this application, the suction structure 200 further includes a second tube 202 extending along a third direction Y. The second tube 202 is mounted on the mounting plate 124. The second tube 202 has a plurality of second suction ports along the third direction Y. At least part of the plurality of second suction ports is located on the side of the second tube 202 away from the mounting plate 124.

[0104] The second tube 202 has a similar structure to the first tube 201, and is also located within the buffer layer 103. Multiple second suction ports are provided along the third direction Y. The second tube 202 is arranged parallel to the first tube 201, and the second tube 202 and the first tube 201 are located on opposite sides of the thread inlet 121. For example, the first tube 201 is located on one side of the cover plate 123, and the second tube 202 is located on one side of the mounting plate 124.

[0105] For example, the second suction port of the second tube 202 and the first suction port 203 of the first tube 201 are arranged in an up-down opposite layout. This allows the suction structure 200 to simultaneously draw gaseous extractant 101 from both the upper and lower sides of the inlet 121, thereby improving suction efficiency.

[0106] In one example, the first tube 201 and the second tube 202 are connected to the same vacuum pump or a separate vacuum pump via their respective pipes, and their pumping power can be adjusted as needed. For example, in the high temperatures of summer, the pumping power of the second tube 202 is increased to focus on pumping high-concentration gases near the sampler surface; in the low temperatures of winter, the pumping power of the two is kept in balance to maintain a stable emission control effect.

[0107] This application also provides a fiber production apparatus, including the extraction apparatus described in the above embodiments.

[0108] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. An extraction apparatus, characterized in that, include: An extraction box for containing an extractant, the extraction box comprising a connected body and a fiber inlet, the fiber inlet protruding from the body along a first direction, the fiber inlet comprising a sealing layer, a buffer layer and a fiber inlet disposed in layers along the first direction; A suction structure, at least partially housed within the buffer layer, is provided with its length direction intersecting the first direction, for suctioning gaseous extractant.

2. The extraction apparatus according to claim 1, characterized in that, The yarn inlet includes a mounting plate, a support plate, and a cover plate. The support plate and the cover plate are rotatably connected. The cover plate and the mounting plate define the yarn inlet. Along the second direction, the cover plate and the support plate are located on one side of the yarn inlet, and the mounting plate is located on the other side of the yarn inlet. The end of the support plate facing away from the cover plate is connected to the main body, wherein the first direction is perpendicular to the second direction.

3. The extraction apparatus according to claim 2, characterized in that, The suction structure is installed on the cover plate.

4. The extraction apparatus according to claim 3, characterized in that, The cover plate includes a first plate segment and a second plate segment connected at an angle. The first plate segment is rotatably connected to the support plate, and the second plate segment and the mounting plate define the wire inlet. The suction structure is connected to the first plate segment and the second plate segment.

5. The extraction apparatus according to claim 4, characterized in that, The first plate segment is located on the extension path of the support plate itself in the longitudinal direction. The mounting plate includes a third plate segment and a fourth plate segment connected together. The third plate segment extends along a first direction, and the fourth plate segment extends along a second direction. The first direction is perpendicular to the second direction. The fourth plate segment is opposite to and spaced apart from the second plate segment to form the wire inlet.

6. The extraction apparatus according to claim 2, characterized in that, Along the first direction, the wire inlet is opposite to the body portion; The distance between the support plate and the mounting plate tends to gradually decrease from the body portion toward the wire inlet.

7. The extraction apparatus according to claim 2, characterized in that, The inlet extends in a third direction and is located at the inlet portion; The suction structure includes a first tube extending along the third direction, the first tube having a plurality of first suction ports along the third direction, at least a portion of the plurality of first suction ports being located on the side of the first tube away from the cover plate.

8. The extraction apparatus according to claim 7, characterized in that, The plurality of first suction ports are opened at equal angles along the circumference of the first tube.

9. The extraction apparatus according to claim 7, characterized in that, The suction structure further includes a second tube extending along the third direction. The second tube is mounted on the mounting plate. The second tube has a plurality of second suction ports along the third direction. At least a portion of the plurality of second suction ports are located on the side of the second tube away from the mounting plate.

10. A fiber production apparatus, characterized in that, The extraction apparatus includes any one of claims 1 to 9.

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