Spinning solution filtering device

Abstract

The utility model provides a spinning solution filtering device, which comprises a tank body, a filtering device, a filtering device and a filtering device, wherein a feeding hole and a discharging hole which are communicated with the inside and the outside of the tank body are respectively formed in the bottom and the top of the tank body; the filter sticks are arranged in the tank body, the upper ends of the filter sticks are located at the discharge port end, the lower ends of the filter sticks are located at the feed port end, a gap is formed between the filter sticks and the feed port, and a spinning solution enters the tank body from the feed port, flows into the filter sticks to be filtered and then flows out from the discharge port. According to the utility model, the interval design between the lower end of the filter stick and the feed port allows the spinning stock solution to fully diffuse after entering the tank body and uniformly flow into the filter stick under the action of gravity, so that each filter stick can uniformly participate in the filtering process, the filtering area and the filtering efficiency are maximized, and the yield of the spinning stock solution is improved. According to the spinning solution filtering device, impurities can be effectively removed, so that the purity of the spinning solution is improved, the quality of final fibers is directly influenced, the strength and the uniformity of the fibers are improved, and meanwhile, the surface smoothness of products is also improved.

Description

Technical Field

[0001] This utility model belongs to the field of spinning production technology, specifically, it relates to a spinning solution filtration device. Background Technology

[0002] Spinning solutions are liquid materials used in the production of synthetic fibers, typically composed of high-molecular-weight polymers and solvents or molten polymers. Depending on the spinning method, spinning solutions can be classified as solution spinning solutions, melt spinning solutions, gel spinning solutions, and emulsion or suspension spinning solutions. The properties of the spinning solution directly affect the quality and application of the fiber; therefore, precise control of its composition and preparation process is a crucial aspect of fiber production.

[0003] To ensure the purity of the spinning solution, it is usually necessary to filter it before spinning to remove impurities. In existing technology, commonly used spinning solution filtration devices typically include a storage tank and several filter elements. The solution enters the storage tank through the inlet, then impurities are removed by the filter elements, and finally it is discharged from the outlet.

[0004] However, traditional filtration devices suffer from low filtration efficiency and poorly designed filter elements, failing to adequately intercept impurities in the spinning solution, leading to unstable quality of the final spun yarn. Furthermore, filter elements are prone to clogging by impurities in the spinning solution over prolonged use, resulting in decreased filtration efficiency and requiring frequent replacement or cleaning, increasing maintenance costs and downtime. In addition, the complex structure of traditional filtration devices, especially the filter elements, makes thorough cleaning difficult, complicating regular maintenance and impacting production efficiency.

[0005] In view of the above, this utility model is hereby proposed. Utility Model Content

[0006] This utility model provides a spinning solution filtration device to improve filtration efficiency, reduce filter rod clogging, extend the service life of the filtration device, ensure consistent flow rate, facilitate cleaning and maintenance, and improve the quality of the final product.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A spinning solution filtration device, comprising:

[0009] The tank body has an inlet and an outlet at the bottom and top, respectively, that connect the inside and outside of the tank body;

[0010] Several filter rods are installed inside the tank. The upper end of the filter rod is located at the discharge port and the lower end is located at the inlet port, with a gap between them. The spinning solution enters the tank from the inlet port, flows into the filter rod for filtration, and then flows out from the discharge port.

[0011] Furthermore, the feed inlet is located on the bottom wall of the tank, and there is a gap between the filter rods and the bottom wall of the tank.

[0012] Furthermore, a lower liquid-passing plate is horizontally placed above the feed inlet of the tank body, which is vertically opposite to the bottom wall of the tank body. The lower liquid-passing plate and the bottom wall of the tank body form a liquid inlet cavity. Several lower liquid-passing holes are opened on the lower liquid-passing plate to connect the inside and outside of the liquid inlet cavity. Several filter rods are arranged above the lower liquid-passing plate and are spaced apart from the lower liquid-passing plate. The spinning raw liquid enters the liquid inlet cavity from the feed inlet, and the spinning raw liquid in the liquid inlet cavity flows into the filter rods for filtration after passing through the lower liquid-passing holes.

[0013] Furthermore, the lower ends of the filter rods and the lower liquid passage holes of the lower liquid passage plate are respectively arranged vertically opposite each other.

[0014] Furthermore, the diameter of the lower liquid passage hole is greater than or equal to the diameter of the filter rod and less than or equal to the diameter of the feed inlet.

[0015] Furthermore, at least one of the several liquid-passing holes is arranged vertically opposite to the feed inlet.

[0016] Furthermore, the outer peripheral wall of the lower liquid-passing plate is circumferentially abutting against the inner peripheral side wall of the tank, and the distance between the lower ends of the filter rods and the lower liquid-passing plate is less than the minimum distance between the filter rods and the inner peripheral side wall of the tank.

[0017] Furthermore, adjacent filter rods are spaced apart, and the distance between adjacent filter rods is less than the minimum distance between the filter rod and the inner circumferential sidewall of the tank.

[0018] Furthermore, a reverse flushing port connecting the inside and outside of the tank is provided on the peripheral side wall of the tank body, and the lower end of the filter rod is set higher than the feed inlet of the tank body and lower than the reverse flushing port.

[0019] Furthermore, a liquid-passing plate is horizontally placed below the discharge port inside the tank, which is vertically opposite to the top wall of the tank. The liquid-passing plate and the top wall of the tank form a liquid discharge cavity. Several liquid-passing holes are opened on the liquid-passing plate to connect the inside and outside of the liquid inlet cavity. The upper ends of several filter rods respectively block several of the liquid-passing holes and are connected to the liquid-passing plate. The spinning raw liquid filtered by the filter rods flows through the liquid-passing holes to the liquid discharge cavity and flows out from the discharge port.

[0020] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0021] In this invention, the spacing between the lower end of the filter rod and the feed inlet allows the spinning solution to diffuse sufficiently after entering the tank. This design ensures that each filter rod participates in the filtration process uniformly, maximizing the filtration area and efficiency.

[0022] In addition, by setting a gap between the filter rod and the feed inlet, large particles of impurities in the raw liquid have time to settle to the bottom of the tank before entering the filter rod, preventing them from directly entering the filter rod and causing blockage. In this way, fine particles of impurities will enter the filter rod for filtration, thereby reducing the risk of blockage and extending the service life of the filter rod.

[0023] Furthermore, the spacing design of the filter rods helps to slow down the flow rate of the raw liquid, keeping it stable during the filtration process. This avoids excessive pressure drop caused by excessive flow rate, thus ensuring a uniform flow rate of the raw liquid at the outlet and promoting the continuity and stability of subsequent spinning processes.

[0024] In addition, the spaced design makes the filter rods easier to disassemble and clean. Impurities mainly accumulate at the bottom of the tank below the filter rods, eliminating the need for complicated disassembly operations during cleaning, reducing equipment downtime and improving overall production efficiency.

[0025] The spinning solution filtration device of this invention can effectively remove impurities, thereby improving the purity of the spinning solution. This directly affects the quality of the final fiber, improving the strength and uniformity of the fiber, and also improving the surface smoothness of the product.

[0026] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0028] Figure 1 This is a schematic diagram of the assembly structure of the spinning solution filtration device of this utility model;

[0029] Figure 2 The diagram below shows the assembly structure of the lower liquid-passing plate in the spinning solution filtration device of this utility model.

[0030] In the picture:

[0031] 1. Tank body; 11. Top wall of tank body; 12. Bottom wall of tank body; 13. Inlet; 14. Outlet; 15. Side wall of tank body; 2. Filter rod; 21. Lower end of filter rod; 22. Upper end of filter rod; 23. First partition; 3. Lower liquid plate; 31. Lower liquid hole; 32. Outer periphery of lower liquid plate; 33. Second partition; 4. Upper liquid plate; 41. Upper liquid hole; 5. Backwash port.

[0032] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0036] like Figure 1 , Figure 2 As shown, this utility model provides a spinning solution filtration device. Specifically, the main structure of the filtration device is a tank 1, which consists of a top wall 11, a bottom wall 12, and side walls 15. The bottom wall 12 has an inlet 13 for inputting the spinning solution, and the top wall 11 has an outlet 14 for discharging the filtered solution. By setting the inlet 13 and outlet 14 at the bottom and top of the tank respectively, a bottom-up liquid flow path is formed. The solution is filtered through the filter rod 2 under the combined action of gravity and liquid flow pressure, enhancing the filtration efficiency. The filter rod 2 is a metal sintered felt filter rod, which is a porous media filter material made of multiple layers of metal fiber mesh sintered at high temperature. This material is usually made of stainless steel fiber, which is bonded together through a sintering process to form a robust structure with good air permeability.

[0037] The feed inlet 13 is located on the bottom wall 12 of the tank and communicates with the outside of the tank 1. The raw liquid enters the tank 1 through the piping system. The bottom feed design helps large particles of impurities settle during the flow, reducing the risk of them directly entering the filter rod 2 and extending the service life of the filter rod 2. The discharge outlet 14 is located on the top wall 11 of the tank, through which the filtered spinning raw liquid is discharged. The top discharge design ensures that the raw liquid flows out after thorough filtration, ensuring high-purity product quality.

[0038] Several filter rods 2 are vertically arranged inside the tank 1. The upper end 22 of each filter rod is located near the outlet 14, and the lower end 21 of each filter rod is located above the inlet 13, with a gap between them. The structure of the filter rod 2 provides a large filtration area, allowing impurities in the spinning solution to be effectively trapped during flow. The gap between the lower end 21 of the filter rod and the inlet 13 helps control the flow rate, ensuring stable passage through the filter rod 2 and thus optimizing the filtration effect. In addition, the gap between the lower end 21 of the filter rod and the inlet 13 allows impurities in the spinning solution to settle to the bottom of the tank before entering the filter rod 2, thereby reducing the risk of filter rod 2 clogging, improving filtration efficiency, and extending the service life of the filter rod 2.

[0039] The spinning solution enters the tank 1 through the inlet 13 and flows inside the tank 1 under gravity. When the liquid reaches the lower end 21 of the filter rod 2, it needs to settle before entering the filter rod 2 due to the gap. Impurities in the solution are trapped by the filter rod 2, and the filtered liquid flows out through the upper end 22 of the filter rod 2 and is finally discharged through the outlet 14. This device has a simple and compact structure and effectively utilizes gravity and liquid pressure for filtration. The layout of the tank 1 and filter rod 2 optimizes the filtration efficiency, reduces maintenance frequency and cost, and is suitable for spinning solutions of various viscosities. This design not only improves the filtration efficiency and effect but also extends the service life of the equipment and reduces operating costs.

[0040] The spacing design between the lower end 21 of the filter rod 2 and the feed inlet 13 in this utility model allows the spinning solution to fully diffuse after entering the tank 1 and flow evenly into the interior of the filter rod 2 under the action of gravity. This design ensures that each filter rod 2 can participate in the filtration process evenly, maximizing the filtration area and efficiency.

[0041] The feed inlet 13 is located on the bottom wall 12 of the tank. This design aims to optimize the flow path of the spinning solution and improve filtration efficiency. The position of the feed inlet 13 allows the spinning solution to enter from the bottom of the tank 1.

[0042] Furthermore, a first gap 23 is provided between the filter rod 2 and the bottom wall 12 of the tank. The presence of the first gap 23 serves multiple purposes. First, it provides sufficient space for the spinning solution to undergo initial settling after entering the tank. Larger particles of impurities have a chance to settle to the bottom under gravity at this stage, thereby reducing the possibility of larger particles of impurities entering the filter rod 2. This not only reduces the risk of clogging of the filter rod 2, but also reduces the frequency and cost of maintenance.

[0043] Furthermore, the spaced design allows the liquid to maintain a relatively stable velocity during flow, avoiding eddies and turbulence caused by velocity variations. This stable flow condition helps improve the uniformity of filtration, enabling each filter rod 2 to participate more evenly in the filtration process. The stable liquid flow also reduces the mechanical stress on the filter rod 2 structure, extending its service life.

[0044] In this invention, a lower liquid-passing plate 3 is horizontally arranged above the feed inlet 13. This lower liquid-passing plate 3 is vertically opposite to the bottom wall 12 of the tank, forming a liquid inlet chamber. The liquid inlet chamber plays a role in stabilizing the flow and uniformly distributing the liquid throughout the filtration process.

[0045] The lower liquid-passing plate 3 has several lower liquid-passing holes 31. The design of these lower liquid-passing holes 31 allows the spinning solution in the liquid inlet chamber to flow evenly. After the solution enters the liquid inlet chamber from the feed port 13, it enters the filter rod 2 through the lower liquid-passing holes 31 for filtration. The presence of the lower liquid-passing holes 31 helps to regulate the flow speed and direction of the solution, preventing turbulence inside the tank. This avoids direct impact of the liquid flow on the filter rod and protects the integrity of the filter rod structure.

[0046] Several filter rods 2 are positioned above the lower liquid-passing plate 3, with a first gap 23 between them. The presence of the first gap 23 provides a buffer space for the spinning solution before it flows into the filter rods 2, allowing the liquid to flow more smoothly into the filter rods 2. This design not only helps reduce the mechanical stress and wear of the filter rods 2, but also improves filtration efficiency and product quality.

[0047] Furthermore, in the spinning solution filtration device of this invention, the lower ends 21 of several filter rods 2 are respectively arranged vertically opposite to several lower liquid passage holes 31 of the lower liquid passage plate 3. This design ensures the flow efficiency and filtration effect of the spinning solution when it flows into the filter rods 2 through precise alignment.

[0048] The lower end 21 of the filter rod is directly aligned with the lower liquid passage 31. This configuration ensures that the raw liquid can immediately enter the filter rod 2 for filtration after passing through the lower liquid passage 31. This direct alignment helps maximize the efficiency of the liquid flow path and reduces lateral flow and turbulence that may occur when the liquid enters the filter rod 2. In this way, the liquid can enter the filter rod 2 in a stable and direct manner, reducing the possibility of the liquid losing kinetic energy or direction during flow.

[0049] This design also ensures that each filter rod 2 receives the incoming spinning solution evenly, allowing each filter rod 2 to fully perform its filtration function. This uniformity not only improves the overall filtration efficiency but also reduces the local load on the filter rod 2, minimizing the risk of premature failure of individual filter rods 2.

[0050] In the spinning solution filtration device of this utility model, the diameter of the lower liquid passage hole 31 on the lower liquid passage plate 3 is designed to be greater than or equal to the diameter of the filter rod 2 and less than or equal to the diameter of the feed inlet 13.

[0051] The diameter of the lower liquid passage 31 is greater than or equal to the diameter of the filter rod 2. This design ensures that the raw liquid is not blocked when passing through the lower liquid passage 31, guaranteeing that the liquid can flow smoothly into the interior of the filter rod 2 for filtration. This feature reduces fluid resistance, thereby improving flow efficiency. The diameter of the lower liquid passage 31 is less than or equal to the diameter of the feed inlet 13, ensuring that the liquid flow rate and pressure are balanced during the liquid feeding process. This design prevents turbulence caused by excessive flow rate, helps maintain the stability of the liquid flow, and thus protects the structural integrity of the filter rod 2.

[0052] The selection of the pore size of the lower liquid passage 31 in this invention directly affects the uniformity of filtration. By setting a reasonable pore size, it is ensured that the raw liquid can be evenly distributed to each filter rod 2, avoiding situations where the local pressure is too high or too low, thereby ensuring that each filter rod can fully exert its filtration capacity.

[0053] In the spinning solution filtration device of this utility model, a lower liquid passage hole 31 is designed on the lower liquid passage plate 3, wherein at least one lower liquid passage hole is arranged vertically opposite to the feed inlet 13.

[0054] By aligning at least one lower liquid outlet 31 with the feed inlet 13 vertically, the spinning solution can flow directly into the lower liquid outlet 31 after entering the tank 1, and then into the filter rod 2 for filtration. This design minimizes the residence time of the liquid in the tank, avoiding unnecessary lateral flow and liquid stagnation.

[0055] The vertically aligned design makes the liquid flow path more direct and efficient. The spinning solution does not need to undergo unnecessary flow and reverse flow within tank 1, thus reducing liquid kinetic energy loss and improving filtration efficiency. Furthermore, the directly aligned liquid flow path reduces turbulence and eddies caused by complex liquid flow paths, thereby maintaining the stability and consistency of the liquid flow. This helps protect filter rod 2 from uneven pressure and extends its service life.

[0056] In this utility model, the outer peripheral wall 32 of the lower liquid-passing plate 3 is circumferentially abutting against the inner peripheral side wall 15 of the tank body, and the gap between the lower end 21 of the filter rod 2 and the lower liquid-passing plate 3 is less than the minimum gap between the filter rod 2 and the inner peripheral side wall of the tank body 1.

[0057] The outer peripheral wall 32 of the lower liquid-passing plate 3 circumferentially abuts against the inner peripheral side wall 15 of the tank, ensuring the stable positioning of the lower liquid-passing plate 3 within the tank. The gap between the lower end 21 of the filter rod 2 and the lower liquid-passing plate 3 is designed to be small, ensuring that the raw liquid can directly flow into the filter rod 2 for filtration after flowing out of the lower liquid-passing hole 31. This compact spacing design reduces liquid retention and lateral flow between the lower liquid-passing plate 3 and the filter rod 2, ensuring the directness and consistency of the liquid flow. The larger gap between the filter rod 2 and the inner peripheral side wall 15 of the tank avoids the boundary effect of the liquid flow near the tank peripheral side wall 15, preventing the formation of unnecessary eddies and turbulence in this area, thereby improving the stability of the filtration process.

[0058] Furthermore, in the spinning solution filtration device of this invention, the filter rods 2 are spaced apart, and the distance between adjacent filter rods is less than the minimum distance between the filter rod 2 and the inner peripheral sidewall 15 of the tank. This design improves filtration efficiency and device stability by optimizing the arrangement of the filter rods 2.

[0059] The spacing design between adjacent filter rods 2 ensures that the liquid can be evenly distributed around each filter rod 2. By reducing the distance between adjacent filter rods 2, the filtration area per unit volume is increased, allowing the spinning solution to come into contact with more filter media during the filtration process.

[0060] The spacing between adjacent filter rods 2 is smaller than the minimum spacing between filter rod 2 and the inner peripheral sidewall 15 of the tank, ensuring that the main flow direction of the liquid inside the tank is in the area between the filter rods. This design restricts the flow of liquid near the tank sidewall, thereby reducing turbulence and energy loss caused by boundary effects. Furthermore, by ensuring that the liquid mainly flows between the filter rods 2, efficient filtration through the filter rods 2 is ensured. The relatively large spacing between the filter rods 2 and the tank sidewall 15 provides an additional buffer zone, preventing liquid buildup and turbulence at the sidewall.

[0061] In this utility model, a reverse flushing port 5 is provided on the peripheral side wall 15 of the tank body, which connects the inside and outside of the tank body, and the lower end 21 of the filter rod 2 is higher than the feed inlet 13 of the tank body and lower than the reverse flushing port 5.

[0062] The backwash port 5 is located above the lower end 21 of the filter rod 2. This allows the backwash liquid to fully contact the filter rod 2 during backwashing, especially since there are more impurities and deposits near the lower end 21 of the filter rod. The backwash port 5, being located above the lower end 21 of the filter rod 2, can focus on rinsing the area near the lower end 21 of the filter rod.

[0063] Alternatively, as one embodiment of this technical solution, a water inlet is provided at the top of the tank 1, through which water is introduced into the tank to clean the inside of the tank 1. The cleaned liquid can flow out through the feed inlet 13 and the reverse flushing inlet 5, thereby achieving top-down flushing of the tank.

[0064] The lower end 21 of the filter rod is positioned above the feed inlet 13. This design prevents impurities deposited at the bottom of the tank from directly entering the filter rod 2, thus avoiding clogging during filtration. Simultaneously, this height difference allows the backwash fluid to effectively remove blockages through the lower end of the filter rod 2 during backwashing.

[0065] The flushing fluid is injected from outside the tank 1 through the backwash port 5 and flows along the direction of the filter rod 2, carrying away particulate matter and impurities adhering to the surface of the filter rod. This process does not require disassembling the filter rod, reducing the difficulty of cleaning and downtime, and improving the operating efficiency of the equipment.

[0066] Furthermore, in the spinning solution filtration device of this utility model, an upper liquid-passing plate 4 is horizontally arranged below the discharge port 14 inside the tank. The upper liquid-passing plate is vertically opposite to the top wall 11 of the tank to form a liquid outlet chamber. The upper liquid-passing plate 4 has a plurality of upper liquid-passing holes 41. The upper end 22 of the filter rod 2 respectively blocks these upper liquid-passing holes 41 and is connected to the upper liquid-passing plate 4.

[0067] Specifically, both the upper end 22 of the filter rod 2 and the internal cavity of the upper liquid passage 41 are threaded. During installation, the filter rod 2 is screwed into the upper liquid passage 41 to form a secure threaded connection. Alternatively, the upper liquid passage 41 on the upper liquid passage plate 4 is slightly larger than the diameter of the upper end 22 of the filter rod 2, allowing the upper end 22 of the filter rod to be inserted into the upper liquid passage 41. Alternatively, the upper end 22 of the filter rod 2 has a flange, which is bolted to the corresponding flange hole on the upper liquid passage plate 4. Alternatively, snaps or retaining rings are designed on the upper liquid passage 41 and the upper end 22 of the filter rod 2 to allow for quick insertion and fixation of the filter rod 2.

[0068] The upper liquid-passing plate 4 forms an independent liquid outlet chamber below the top wall 11 of the tank. This structure effectively guides the filtered spinning solution from the filter rod 2 to the outlet 14. This design ensures that the solution can flow into the outlet chamber through the upper liquid-passing hole 41 at a stable flow rate and pressure, thereby improving the overall filtration efficiency.

[0069] The opening of the liquid inlet 41 allows the filtered raw liquid to pass through smoothly and flow into the liquid outlet chamber. The arrangement and size of these holes are carefully designed to ensure that the raw liquid flows out of the filter rod 2 evenly and quickly collects in the liquid outlet chamber.

[0070] The upper end 22 of filter rod 2 directly blocks the upper liquid passage 41. This design allows the raw liquid to directly enter the upper liquid passage 41 after filtration by the filter rod. This arrangement reduces the residence time of the liquid before entering the outlet chamber, lowers the risk of turbulence, and ensures a smooth outflow process. The filtered raw liquid can quickly flow through the upper liquid passage 41 into the outlet chamber, ensuring a direct and efficient flow path. After the liquid collects in the outlet chamber, it is discharged from the outlet 14. The entire process simplifies the liquid flow path and reduces flow resistance.

[0071] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A spinning solution filtration device, characterized in that: include: The tank has an inlet and an outlet at its bottom and top, respectively, which connect the inside and outside of the tank. The inlet is located on the bottom wall of the tank, and the side wall of the tank has a reverse flushing port that connects the inside and outside of the tank. Above the feed inlet of the tank body, there is a lower liquid-passing plate that is horizontally positioned above the bottom wall of the tank body. The lower liquid-passing plate and the bottom wall of the tank body form a liquid inlet cavity. Several lower liquid-passing holes are opened on the lower liquid-passing plate to connect the inside and outside of the liquid inlet cavity. Several filter rods are installed inside the tank. The upper end of the filter rod is located at the discharge port, and the lower end is located above the lower liquid plate and there is a gap between the filter rod and the lower liquid plate. The lower end of the filter rod and the lower liquid hole of the lower liquid plate are respectively arranged vertically opposite each other. The lower end of the filter rod is lower than the reverse flushing port. Adjacent filter rods are spaced apart, and the distance between adjacent filter rods is less than the minimum distance between the filter rod and the inner circumferential sidewall of the tank. The spinning solution enters the tank through the feed inlet, flows into the filter rod for filtration, and then flows out through the discharge outlet. The tank is also provided with a water inlet at the top, through which water is introduced into the tank to clean the inside of the tank. The cleaned liquid flows out through the feed inlet and the backwash inlet.

2. The spinning solution filtration device according to claim 1, characterized in that: The diameter of the lower liquid passage hole is greater than or equal to the diameter of the filter rod and less than or equal to the diameter of the feed inlet.

3. The spinning solution filtration device according to claim 2, characterized in that: At least one of the several liquid-passing holes is arranged vertically opposite to the feed inlet.

4. The spinning solution filtration device according to claim 1, characterized in that: The outer peripheral wall of the lower liquid-passing plate is circumferentially abutted against the inner peripheral side wall of the tank, and the distance between the lower ends of the filter rods and the lower liquid-passing plate is less than the minimum distance between the filter rods and the inner peripheral side wall of the tank.

5. A spinning solution filtration device according to any one of claims 1-4, characterized in that: Below the discharge port inside the tank, there is a horizontally placed upper liquid-passing plate that is vertically opposite to the top wall of the tank. The upper liquid-passing plate and the top wall of the tank form a liquid discharge cavity. Several upper liquid-passing holes are opened on the upper liquid-passing plate to connect the inside and outside of the liquid inlet cavity. The upper ends of several filter rods respectively block several of the upper liquid-passing holes and are connected to the upper liquid-passing plate. The spinning raw liquid filtered by the filter rods flows through the upper liquid-passing holes to the liquid discharge cavity and flows out from the discharge port.

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