Aramid fibrid production device

Abstract

The utility model relates to the technical field of aramid fiber production, and disclose a kind of aramid fiber production device, including filter tank, the both sides of filter tank are symmetrically welded with support, and the top of support is fixedly installed with electric telescopic rod, the top of filter tank is equipped with sealing cover, and the both sides of sealing cover are correspondingly welded with fixed plate.The aramid fiber production device is linked design through electric telescopic rod and sealing cover, filter component, solve the tedious problem caused by the operation of existing filter device fixed in tank, electric telescopic rod can drive sealing cover to drive filter component whole lifting, without disassembling tank, fiber in filter layer can be directly taken out, and filter screen frame and vertical rod are detachably connected, composite filter layer is locked and fixed by fixed inner frame and filter screen frame, when replacing filter layer, only need to disassemble bolt, overall operation is simple and convenient, reduce the operation difficulty and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of aramid precipitation fiber production technology, specifically to an aramid precipitation fiber production device. Background Technology

[0002] Aramid precipitated fiber, as a high-performance polymer material, has excellent properties such as high strength, high temperature resistance, and chemical corrosion resistance, and is widely used in filter materials, composite material reinforcements and other fields.

[0003] Its production process requires going through key steps such as polymerization, precipitation, coagulation, filtration, washing, and dehydration in sequence. Among them, the core function of the filtration process is to separate the solidified precipitated fibers from the coagulation liquid in the coagulation tank, so as to provide pure fiber raw materials for the subsequent washing and dehydration processes.

[0004] The prior art patent document CN208071859U provides a production system for controllable performance of aramid precipitated fibers. The system includes a polymerization kettle, a precipitation machine, a coagulation tank, a filtration device, a washing device, and a dewatering device.

[0005] The existing technologies described above, while employing conventional filtration equipment to separate precipitated fibers from coagulated liquid, are characterized by cumbersome procedures for removing fibers and replacing the filter, as the existing filtration devices are mostly fixed on supports within the tank. Furthermore, the feeding structure of existing devices is mostly direct conduit feeding, which easily causes the suspension to concentrate and impact the filter cloth's internal area, resulting in uneven stress on the filter cloth and shortening its service life. Moreover, it cannot effectively pre-wash the fibers on the filter cloth. Therefore, we need an aramid precipitated fiber production device. Utility Model Content

[0006] The purpose of this utility model is to provide an aramid precipitated fiber production device to solve the problems mentioned in the background art, such as the filter device being fixed inside the tank, the fiber removal and filter component replacement being cumbersome, the feeding structure being a direct conduit for feeding, the precipitated fiber suspension being prone to concentrating and impacting the filter layout, and the lack of fiber pre-rinsing function.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an aramid fiber precipitation production device, including a filter tank, on both sides of the filter tank are symmetrically welded with brackets, and an electric telescopic rod is fixedly installed on the top of the brackets. The top of the filter tank is equipped with a sealing cover, and fixed plates are welded to both sides of the sealing cover. The telescopic end of the electric telescopic rod is fixedly connected to the fixed plate for driving the sealing cover to rise and fall. A filter assembly is provided at the bottom of the sealing cover. The filter assembly includes a vertical rod fixedly connected to the bottom of the sealing cover. The bottom end of the vertical rod is detachably connected to an annular filter frame. The inner wall of the filter frame is provided with a metal filter, an aramid nonwoven fabric, and a polytetrafluoroethylene microporous filter membrane in sequence from the inside to the outside. The inner side of the filter frame is provided with a fixed inner frame, which is locked and fixed to the filter frame by bolts, clamping and fixing the metal filter, the aramid nonwoven fabric, and the polytetrafluoroethylene microporous filter membrane. The metal filter, the aramid nonwoven fabric, and the polytetrafluoroethylene microporous filter membrane are all frustum-shaped structures with their large opening end facing upwards. The outer wall of the vertical rod is equipped with a cleaning component. The cleaning assembly includes a horizontal bar welded to the middle of the vertical bar, a dispersing block fixedly connected to the end of the horizontal bar away from the vertical bar, an arc-shaped top on the top of the dispersing block, and a spray plate fixedly connected to the bottom of the dispersing block by bolts.

[0008] Preferably, the top of the sealing cap is fixedly connected to a feed inlet, which is coaxial with the arc-shaped top, and the central axis of the feed inlet coincides with the central axis of the polytetrafluoroethylene microporous filter membrane.

[0009] Preferably, the dispersion block is located in the upper central region of the polytetrafluoroethylene microporous filter membrane, and the outer diameter of the dispersion block is smaller than the inner diameter of the large opening end of the polytetrafluoroethylene microporous filter membrane.

[0010] Preferably, a water pump is fixedly installed on the top of the sealing cover, the water inlet end of the water pump is connected to a water inlet pipe, and the water outlet end of the water pump is connected to a delivery pipe. One end of the delivery pipe passes through the sealing cover and is sealed to the water inlet end of the spray plate.

[0011] Preferably, the bottom of the spray plate is evenly provided with a plurality of spray nozzles arranged at multiple angles, and the spray range of the plurality of spray nozzles covers the entire upper surface of the polytetrafluoroethylene microporous filter membrane.

[0012] Preferably, there are two vertical rods, which are symmetrically distributed on both sides of the bottom of the sealing cover. An annular sealing ring is embedded in the outer wall of the filter frame. The outer wall of the sealing ring slides and fits against the inner wall of the filter tank to achieve a sealing fit.

[0013] Preferably, the outer wall of the filter tank is provided with a transparent observation window, the height of which corresponds to the installation height of the filter assembly. The bottom of the filter tank is integrally formed with a funnel, and the bottom of the funnel is sealed and connected to a drain pipe. The bottom end of the drain pipe is fixedly connected to a flange.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are: First, this utility model solves the problem of cumbersome operation caused by the existing filter device being fixed inside the tank through the linkage design of the electric telescopic rod, the sealing cover, and the filter assembly. The electric telescopic rod can drive the sealing cover to lift the filter assembly as a whole, and the fibers in the filter layer can be directly removed without disassembling the tank. Moreover, the filter frame and the vertical rod are detachably connected, and the composite filter layer is locked and fixed to the filter frame by the fixed inner frame. When replacing the filter layer, only the bolts need to be removed. The overall operation is simple and convenient, reducing the difficulty of operation and maintenance costs.

[0015] Secondly, this utility model effectively improves the problem of concentrated impact of suspension by coaxially setting the feed inlet and the arc-shaped top of the dispersion block, combined with the frustum-shaped composite filter layer structure. After the precipitated fiber suspension falls to the arc-shaped top through the feed inlet, it is evenly dispersed in all directions along the arc surface, avoiding concentrated impact on the filter layer in a localized area, making the filter layer more evenly stressed and extending its service life. At the same time, the evenly dispersed suspension can fully contact the composite filter layer composed of polytetrafluoroethylene microporous filter membrane, aramid nonwoven fabric and metal filter screen, effectively improving the solid-liquid separation efficiency.

[0016] Third, this utility model achieves simultaneous filtration and pre-rinsing processes through the coordinated operation of the water pump, delivery pipe and spray plate. The spray nozzles of the spray plate can fully cover the entire upper surface of the polytetrafluoroethylene microporous filter membrane, which can rinse the fibers on the filter layer in all directions, efficiently remove impurities such as residual solvents and neutralizers on the fiber surface, and reduce the processing pressure of subsequent washing processes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the sealing cap and vertical rod structure of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the dispersion block and spray disc structure of this utility model.

[0018] The components include: 1. Filter tank; 2. Support frame; 3. Electric telescopic rod; 4. Sealing cover; 5. Fixing plate; 6. Filter assembly; 601. Vertical rod; 602. Filter screen frame; 603. Metal filter screen; 604. Aramid nonwoven fabric; 605. Polytetrafluoroethylene microporous filter membrane; 606. Fixed inner frame; 7. Cleaning assembly; 701. Horizontal rod; 702. Dispersion block; 703. Arc-shaped top; 704. Spray tray; 705. Water pump; 706. Water inlet pipe; 707. Conveying pipe; 8. Feed inlet; 9. Observation window; 10. Funnel; 11. Sewage pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-4 As shown, an aramid fiber precipitation production device includes a filter tank 1, with supports 2 symmetrically welded on both sides of the filter tank 1, and an electric telescopic rod 3 fixedly installed on the top of the supports 2. A sealing cover 4 is fitted on the top of the filter tank 1, and fixing plates 5 are welded on both sides of the sealing cover 4. The telescopic end of the electric telescopic rod 3 is fixedly connected to the fixing plate 5 for driving the sealing cover 4 to rise and fall. A filter assembly 6 is provided at the bottom of the sealing cover 4. The filter assembly 6 includes a vertical rod 601 fixedly connected to the bottom of the sealing cover 4. The bottom end of the vertical rod 601 is detachably connected to an annular filter frame 602. The inner wall of the filter frame 602 is provided with a metal filter 603, an aramid nonwoven fabric 604 and a polytetrafluoroethylene microporous filter membrane 605 from the inside to the outside. The inner side of the filter frame 602 is provided with a fixed inner frame 606, and the fixed inner frame 606 is locked and fixed to the filter frame 602 by bolts, clamping and fixing the metal filter 603, the aramid nonwoven fabric 604 and the polytetrafluoroethylene microporous filter membrane 605. The metal filter 603, the aramid nonwoven fabric 604 and the polytetrafluoroethylene microporous filter membrane 605 are all frustum-shaped structures with their large opening end facing upward. The outer wall of the vertical rod 601 is equipped with a cleaning assembly 7. The cleaning assembly 7 includes a horizontal bar 701 welded to the middle of the vertical bar 601. A dispersing block 702 is fixedly connected to the end of the horizontal bar 701 away from the vertical bar 601. The top of the dispersing block 702 is provided with an arc-shaped top 703. A spray plate 704 is fixedly connected to the bottom of the dispersing block 702 by bolts.

[0021] Through the above technical solution, the electric telescopic rod 3 and the water pump 705 are electrically connected to an external controller. The external controller is used to control the lifting and lowering of the electric telescopic rod 3 and the start, stop and output power of the water pump 705. The electric telescopic rod 3 can directly drive the sealing cover 4 to lift and lower the filter assembly 6 as a whole, which solves the cumbersome problem of the existing device where the filter assembly 6 is fixed in the tank and the tank needs to be disassembled to remove the material or replace the filter layer, greatly simplifying the operation process. At the same time, the frustum-shaped composite filter layer structure expands the contact area of ​​the suspension by using the large opening end and guides the fiber convergence through the bottom end, which is suitable for the filtration and collection needs of aramid precipitated fibers. Secondly, the cleaning component 7 is integrated into the filter assembly 6, so that the filtration and pre-rinsing processes can be completed in the same device, improving the overall production efficiency. The bottom of the sealing cover 4 is provided with a raised structure, and a sealing ring is embedded on the outside of the raised structure. When the sealing cover 4 is assembled on the filter tank 1, the sealing performance is enhanced.

[0022] Specifically, the top of the sealing cap 4 is fixedly connected to the feed inlet 8, which is coaxial with the arc-shaped top 703, and the central axis of the feed inlet 8 coincides with the central axis of the polytetrafluoroethylene microporous filter membrane 605.

[0023] Through the above technical solution, it is ensured that the precipitated fiber suspension input through the feed inlet 8 can fall to the center of the arc-shaped top 703. This design provides a stable structural guarantee for the uniform diffusion of the suspension, so that the suspension can be evenly distributed along the radial direction of the arc-shaped top 703, thereby avoiding concentrated impact on local areas of the composite filter layer and effectively reducing the damage and deformation problems of the composite filter layer caused by uneven stress.

[0024] Specifically, the dispersion block 702 is located in the upper central region of the polytetrafluoroethylene microporous filter membrane 605, and the outer diameter of the dispersion block 702 is smaller than the inner diameter of the large opening end of the polytetrafluoroethylene microporous filter membrane 605.

[0025] Through the above technical solution, the dispersing block 702 is located in the upper central area of ​​the filter layer, ensuring that the suspension dispersed by the arc-shaped top 703 can diffuse radially in all directions. Moreover, the outer diameter of the dispersing block 702 is smaller than the inner diameter of the large opening end of the filter layer, avoiding the obstruction of the effective filtration area of ​​the filter layer by the dispersing block 702 and eliminating the generation of filtration dead corners. At the same time, this design allows the dispersed suspension to directly and uniformly cover the entire upper surface of the filter layer, ensuring that each part of the filter layer can fully participate in solid-liquid separation. This not only improves the uniformity of filtration but also makes full use of the filtration area of ​​the filter layer, avoiding local overload and clogging of the filter layer, thereby improving the overall separation efficiency.

[0026] Specifically, a water pump 705 is fixedly installed on the top of the sealing cover 4. The water inlet end of the water pump 705 is connected to the water inlet pipe 706, and the water outlet end of the water pump 705 is connected to the delivery pipe 707. One end of the delivery pipe 707 passes through the sealing cover 4 and is sealed to the water inlet end of the spray plate 704.

[0027] Through the above technical solution, the water inlet pipe 706 is connected to an external water source. The water pump 705 works to transport the cleaning water to the spray plate 704 through the delivery pipe 707. By spraying and rinsing the fibers, impurities attached to the fiber surface can be effectively removed.

[0028] Specifically, the bottom of the spray plate 704 is evenly provided with multiple spray nozzles set at multiple angles, and the spray range of the multiple spray nozzles covers the entire upper surface of the polytetrafluoroethylene microporous filter membrane 605.

[0029] Through the above technical solution, the multi-angle design of the spray nozzles allows the cleaning liquid to impact the fibers from different directions. This not only efficiently removes soluble impurities such as residual solvents and neutralizers from the fiber surface, but also breaks up slightly clustered fibers, reducing fiber clumping. At the same time, the comprehensive spraying method avoids the problem of incomplete cleaning of local fibers, improving the purity of the fibers after pre-rinsing, thereby reducing the water consumption and processing time of the subsequent deep washing process.

[0030] Specifically, there are two vertical rods 601, which are symmetrically distributed on both sides of the bottom of the sealing cover 4. The outer wall of the filter frame 602 is fitted with an annular sealing ring 607. The outer wall of the sealing ring 607 slides and fits against the inner wall of the filter tank 1 to achieve a sealing fit.

[0031] Through the above technical solution, the two symmetrically distributed vertical rods 601 provide a symmetrical and stable support structure for the filter frame 602 and the composite filter layer, which can effectively distribute the weight of the filter assembly 6 and prevent the filter layer from shifting or shaking due to uneven force during filtration or rinsing, ensuring that the filter layer remains stable during filtration. At the same time, the annular sealing ring on the outside of the filter frame 602 forms a tight sliding seal with the inner wall of the filter tank 1, which can ensure the sealing performance during the lifting and lowering of the filter assembly 6 without affecting the smoothness of the lifting and lowering action, effectively blocking the gap between the filter tank 1 and the filter frame 602, preventing the leakage of condensate, and ensuring the filtration and rinsing effect. The filter frame 602 is fixed to the vertical rods 601 with bolts, which facilitates the installation and disassembly of the filter frame 602.

[0032] Specifically, the outer wall of the filter tank 1 is provided with a transparent observation window 9, the height of which corresponds to the installation height of the filter assembly 6. The bottom of the filter tank 1 is integrally formed with a funnel 10, and the bottom of the funnel 10 is sealed and connected to a drain pipe 11. The bottom end of the drain pipe 11 is fixedly connected with a flange.

[0033] Through the above technical solution, operators can monitor key information such as the amount of fiber retained on the filter layer and whether the filter layer is clogged in real time through the observation window 9; the funnel 10 structure at the bottom of the filter tank 1 uses the principle of gravity to guide the filtered coagulated liquid and rinsing waste liquid to quickly converge to the drain pipe 11, which speeds up the liquid discharge speed compared to a flat-bottomed tank; the flange structure at the bottom of the drain pipe 11 provides a convenient interface for the device to be connected to the subsequent solvent recovery system or waste liquid treatment equipment, and can achieve rapid connection with the existing production system without the need for additional processing of adapter parts, thus improving the adaptability and practicality of the device.

[0034] In use, first connect the device to an external power supply. The external power supply powers the device, and the electric telescopic rod 3 operates, driving the sealing cover 4 and the bottom filter assembly 6 to descend until the sealing cover 4 covers the filter tank 1. The sealing ring 607 on the outside of the filter screen frame 602 fits against the inner wall of the filter tank 1 to achieve a seal. Then, close the electric telescopic rod 3. Next, pour the precipitated fiber suspension, which has been solidified in the coagulation tank, into the device through the feed port 8. After the suspension falls to the arc-shaped top 703 of the dispersion block 702, it is evenly dispersed along the arc-shaped surface and slowly falls onto the upper surface of the polytetrafluoroethylene microporous filter membrane 605. Under the action of gravity, the coagulated liquid passes through multiple composite filter layers, including the polytetrafluoroethylene microporous filter membrane 605, aramid nonwoven fabric 604, and metal filter screen 603, and collects in the funnel 10 at the bottom of the filter tank 1. Finally, it is discharged through the drain pipe 11, while the precipitated fibers are trapped in the polytetrafluoroethylene microporous filter membrane 605. On the surface of filter 5, solid-liquid separation is completed. During the filtration process, the operator can observe the fiber retention and filter layer status in real time through the transparent observation window 9. When the fiber retention reaches a certain thickness, the water pump 705 is started through the external controller 12. External water is transported to the spray plate 704 through the inlet pipe 706, water pump 705, and conveying pipe 707. Then, it is sprayed onto the fiber surface through multiple multi-angle spray nozzles to pre-wash the fiber in all directions. The waste liquid generated by rinsing and the coagulated liquid are discharged through the drain pipe 11. After the pre-washing is completed, the water pump 705 is turned off, and the electric telescopic rod 3 is controlled by the external controller 12 to drive the sealing cover 4 and the filter assembly 6 to rise as a whole and detach from the filter tank 1. At this time, the pre-washed precipitated fiber retained on the filter assembly 6 can be directly collected to complete the fiber extraction. This completes all the work. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for producing aramid precipitated fibers, comprising a filter tank (1), characterized in that: The filter tank (1) is symmetrically welded with brackets (2) on both sides, and an electric telescopic rod (3) is fixedly installed on the top of the brackets (2). The top of the filter tank (1) is fitted with a sealing cover (4), and fixed plates (5) are welded to the two sides of the sealing cover (4). The telescopic end of the electric telescopic rod (3) is fixedly connected to the fixed plate (5) to drive the sealing cover (4) to rise and fall. A filter assembly (6) is provided at the bottom of the sealing cover (4). The filter assembly (6) includes a vertical rod (601) fixedly connected to the bottom of the sealing cover (4). The bottom end of the vertical rod (601) is detachably connected to an annular filter frame (602). The inner wall of the filter frame (602) is provided with a metal filter (603), an aramid nonwoven fabric (604), and a polytetrafluoroethylene microporous filter membrane (605) from the inside to the outside. The inner side of the filter frame (602) is provided with a fixed inner frame (606), and the fixed inner frame (606) is locked and fixed to the filter frame (602) by bolts, clamping and fixing the metal filter (603), the aramid nonwoven fabric (604), and the polytetrafluoroethylene microporous filter membrane (605). The metal filter (603), the aramid nonwoven fabric (604), and the polytetrafluoroethylene microporous filter membrane (605) are all frustum-shaped structures with their large opening end facing upwards. The outer wall of the vertical rod (601) is equipped with a cleaning assembly (7). The cleaning assembly (7) includes a horizontal bar (701) welded to the middle of the vertical bar (601). A dispersing block (702) is fixedly connected to one end of the horizontal bar (701) away from the vertical bar (601). The top of the dispersing block (702) is provided with an arc-shaped top (703). A spray plate (704) is fixedly connected to the bottom of the dispersing block (702) by bolts.

2. The aramid fiber precipitation production apparatus according to claim 1, characterized in that: The top of the sealing cap (4) is fixedly connected to the feed inlet (8), which is coaxial with the arc-shaped top (703), and the central axis of the feed inlet (8) coincides with the central axis of the polytetrafluoroethylene microporous filter membrane (605).

3. The aramid fiber precipitation production apparatus according to claim 1, characterized in that: The dispersion block (702) is located in the upper central region of the polytetrafluoroethylene microporous filter membrane (605), and the outer diameter of the dispersion block (702) is smaller than the inner diameter of the large opening end of the polytetrafluoroethylene microporous filter membrane (605).

4. The aramid fiber precipitation production apparatus according to claim 1, characterized in that: A water pump (705) is fixedly installed on the top of the sealing cover (4). The water inlet end of the water pump (705) is connected to the water inlet pipe (706), and the water outlet end of the water pump (705) is connected to the delivery pipe (707). One end of the delivery pipe (707) passes through the sealing cover (4) and is sealed to the water inlet end of the spray plate (704).

5. The aramid fiber precipitation production apparatus according to claim 1, characterized in that: The bottom of the spray plate (704) is evenly provided with multiple spray nozzles arranged at multiple angles, and the spray range of the multiple spray nozzles covers the entire upper surface of the polytetrafluoroethylene microporous filter membrane (605).

6. The aramid fiber precipitation production apparatus according to claim 1, characterized in that: There are two vertical rods (601), which are symmetrically distributed on both sides of the bottom of the sealing cover (4). The outer wall of the filter frame (602) is fitted with an annular sealing ring (607). The outer wall of the sealing ring (607) slides and fits against the inner wall of the filter tank (1) to achieve a sealing fit.

7. The aramid fiber precipitation production apparatus according to claim 1, characterized in that: The outer wall of the filter tank (1) is provided with a transparent observation window (9). The height of the observation window (9) corresponds to the installation height of the filter assembly (6). The bottom of the filter tank (1) is integrally formed with a funnel (10). The bottom of the funnel (10) is sealed and connected to a drain pipe (11). The bottom end of the drain pipe (11) is fixedly connected with a flange.

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