Precursor washing equipment and carbon fiber precursor production line

Abstract

The invention discloses precursor washing equipment and a carbon fiber precursor production line. The precursor washing equipment comprises a circulating water tank; the tow guide roller group is arranged above the circulating water tank and is used for pulling tows; the water inlet end of the circulating spraying water path is communicated with the circulating water tank, the water outlet end of the circulating spraying water path at least forms a spraying branch and a water outlet branch, a water outlet of the spraying branch faces the interior of the circulating water tank, is arranged above the tows and is used for spraying water to the tows, and a water outlet of the water outlet branch faces the running direction of the tows and is arranged below the tows in the circulating water tank. The water outlet is used for discharging water in the tow running direction. The showering branch applies water flow to the tows from top to bottom, it is ensured that the water flow can completely cover the surfaces of the tows in the washing process, and the washing efficiency and the cleaning effect are improved; the water outlets of the water outlet branches face the moving direction of the tows, so that water flow in the circulating water tank flows in the moving direction of the tows, the water flow is prevented from being disturbed back and forth, and mechanical impact and damage of the water flow to the tows are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning, and in particular relates to a precursor water washing device and a carbon fiber precursor production line. Background Art

[0002] Carbon fiber is widely used in high-tech fields such as aerospace, automobile manufacturing, and sports equipment due to its high strength, high modulus, low density, high temperature resistance, and excellent electrical and thermal conductivity. In the carbon fiber production process, impurities such as solvents and salts remaining in the raw yarn after the spinning process will significantly affect the cross-sectional shape and crystalline structure of the fiber, and thus affect the performance of the carbon fiber after carbonization. Therefore, the water washing process is a key step to remove residual solvents and impurities in the raw yarn, which is crucial to ensure the high performance of carbon fiber.

[0003] At present, the washing methods of carbon fiber precursor mainly include immersion method, immersion plus spraying method, etc. Although the single immersion method is easy to operate, the washing effect is often not ideal due to the uneven coverage of the water flow, and it is difficult to completely remove the solvent and salt in the precursor. The immersion plus spraying method has improved the coverage of the water flow to a certain extent, but there are still problems such as uneven washing effect and water flow disturbance of the precursor. During the washing process, the water flow reciprocates to disturb the tow, resulting in uneven force on the tow, which is easy to cause mechanical damage, such as shrinkage, dislocation and twisting. This not only reduces the washing efficiency, but also has an adverse effect on the physical properties of carbon fiber, thereby affecting the quality and reliability of the final product.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a precursor water washing equipment and a carbon fiber precursor production line. By optimizing the water flow design and structural configuration of the precursor water washing equipment, the water washing efficiency and uniformity are improved, while reducing the mechanical damage to the yarn bundle during the water washing process, thereby providing an efficient, stable and economical carbon fiber precursor water washing solution.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: A raw silk washing device, comprising: Circulating water tank; A guide roller group is arranged above the circulating water tank and is used for drawing the yarn bundle; A circulating spray water circuit, wherein the water inlet end is connected to a circulating water tank, and the water outlet end forms at least a flushing branch and a water outlet branch. The water outlet of the flushing branch faces the inside of the circulating water tank and is arranged above the filament bundle for flushing water to the filament bundle. The water outlet of the water outlet branch is arranged below the filament bundle in the circulating water tank towards the direction in which the filament bundle runs, and is used to discharge water in the direction in which the filament bundle runs.

[0007] Furthermore, the water outlet of the water outlet branch is arranged upstream of the water outlet of the shower branch along the running direction of the filament bundle, and is used to discharge water from the upstream of the filament bundle to the downstream of the filament bundle.

[0008] Furthermore, the circulating water tank has a wire feeding end for feeding the wire, and the water outlet of the water outlet branch is arranged close to the wire feeding end.

[0009] Furthermore, the water outlet of the water outlet branch is connected to a water outlet nozzle, and the spray port of the water outlet nozzle is arranged toward the direction in which the filament bundle runs, so as to spray water in the direction in which the filament bundle runs.

[0010] Furthermore, the circulating water tank is provided with spaced apart wire separators along the direction in which the wire bundles run, and the water outlet of the shower branch is arranged between the spaced apart wire separators.

[0011] Furthermore, the shower branch is connected to at least two shower nozzles through a connecting pipe, the spray ports of the shower nozzles form the water outlets of the shower branch, and the two shower nozzles are arranged between the wire separators at intervals along the running direction of the yarn bundles.

[0012] Furthermore, it also includes a circulating heating device, the heating part of the circulating heating device is arranged in the circulating water tank for heating the water in the circulating water tank, the water outlet of the water outlet branch is arranged upstream of the heating part along the direction of the filament bundle running, and the water outlet of the shower branch is arranged above the heating part.

[0013] The present invention also provides a carbon fiber precursor production line, comprising the precursor water washing equipment described in any one of the above technical solutions.

[0014] Furthermore, the carbon fiber precursor production line further comprises a plurality of the precursor washing devices arranged in sequence, the circulating water tanks of the precursor washing devices at adjacent positions are interconnected, and at least one of the plurality of the precursor washing devices is provided with a circulating heating device for heating the water in the circulating water tank; Preferably, at least the raw silk washing equipment at the alternate positions among the plurality of raw silk washing equipment are provided with a circulation heating device.

[0015] Furthermore, the circulating water circuits of the circulating heating devices of different raw silk washing equipment are interconnected.

[0016] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0017] The shower branch of the present invention applies water flow to the fiber bundle from top to bottom, ensuring that the water flow can fully cover the surface of the fiber bundle during the washing process, remove solvent residues and impurities on the surface of the fiber bundle, thereby significantly improving the washing efficiency and cleaning effect; at the same time, the water outlet of the water outlet branch is arranged in the direction of the fiber bundle movement, so that the water flow in the circulating water tank flows along the movement direction of the fiber bundle, avoiding the back and forth disturbance of the water flow, reducing the mechanical impact and damage to the fiber bundle, and maintaining the stability and integrity of the fiber bundle.

[0018] The dual water flow design of the present invention not only ensures the uniformity and efficiency of the washing process, but also effectively prevents problems such as bundle shrinkage, dislocation and twisting caused by unstable water flow, thereby improving the overall performance of the equipment and fiber quality, and meeting the needs of efficient, stable and economical carbon fiber raw yarn washing.

[0019] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings: Figure 1 , is a schematic diagram of the assembly structure of the raw silk washing equipment of the present invention; Figure 2 , for the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle; Figure 3 , is a schematic structural diagram of the carbon fiber precursor production line of the present invention.

[0021] In the figure: 1. Circulating water tank; 11. Overflow tank; 12. Circulating water tank inlet pipe; 13. Overflow tank outlet pipe; 2. Godet roller group; 21. First godet roller group; 22. Second godet roller group; 23. Flower roller; 3. Wire separator; 31. First wire separator; 32. Second wire separator; 4. Circulating spray water circuit; 41. Water inlet end; 42. Shower branch; 421. First shower nozzle; 422. Second shower nozzle; 423. Shower nozzle connecting pipe; 43. Water outlet branch; 431. Water outlet nozzle; 5. Circulating heating device; 51. Heating part; 52. Heating device outlet pipe; 53. Heating device inlet pipe; 54. First liquid storage tank; 541. First liquid storage tank main inlet pipe; 55. Second liquid storage tank; 551. Second liquid storage tank main outlet pipe; 6. Recovery tank; 61. main water inlet pipe of recovery tank; 7. tow; 101. first raw silk water washing equipment; 102. second raw silk water washing equipment; 103. third raw silk water washing equipment; 104. fourth raw silk water washing equipment; 105. fifth raw silk water washing equipment; 106. sixth raw silk water washing equipment; 107. seventh raw silk water washing equipment; 108. eighth raw silk water washing equipment; 109. ninth raw silk water washing equipment; 1010. tenth raw silk water washing equipment; 1011. eleventh raw silk water washing equipment; 1012. spray pipe at the silk outlet end of the water washing equipment; 1013. third liquid storage tank; 1014. first heat exchanger; 1015. fourth liquid storage tank; 1016. liquid inlet pipe of fourth liquid storage tank; 1017. liquid outlet pipe of fourth liquid storage tank; 1018. second heat exchanger.

[0022] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0023] 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.

[0024] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example 1 like Figures 1 to 3 As shown, the present invention provides a raw silk washing equipment. The raw silk washing equipment includes a circulating water tank 1, a wire guide roller group 2 and a circulating spray water circuit 4. The circulating water tank 1 is used as the main container for water circulation during the washing process, and is used to store and recycle the washing medium. The wire guide roller group 2 is arranged above the circulating water tank 1, and specifically includes a first wire guide roller group 21 and a second wire guide roller group 22 which are sequentially arranged at the wire inlet and wire outlet ends of the circulating water tank 1. The wire guide roller group 2 is responsible for pulling the wire bundle 7 to ensure that the wire bundle is uniformly stressed and neatly arranged during the washing process, and to prevent the wire bundle 7 from becoming loose, entangled or out of place during the washing process. The circulating spray water circuit 4 is connected to the circulating water tank 1, and is responsible for evenly distributing the washing medium above and below the wire bundle by spraying.

[0027] More specifically, the water inlet 41 of the circulating spray water circuit 4 is connected to the circulating water tank 1 to ensure the continuous supply of the washing medium. The water outlet of the circulating spray water circuit 4 is divided into a flushing branch 42 and a water outlet branch 43. The water outlet of the flushing branch 42 faces the inside of the circulating water tank 1 and is arranged above the tow 7, which is used to flush the tow 7 from top to bottom to ensure the comprehensive cleaning of the tow surface. At the same time, the water outlet of the water outlet branch 43 is arranged below the tow 7 in the circulating water tank 1 in the direction of the tow 7, which is used to make the water flow flow along the movement direction of the tow 7 to form a continuous water flow circulation. This double spray design not only ensures that the water flow can fully cover the upper and lower surfaces of the tow, but also avoids the back and forth disturbance of the water flow in the water tank, reduces the mechanical impact on the tow, and improves the overall uniformity and efficiency of water washing.

[0028] During the washing process, the wire guide roller group 2 is in the start-up state, evenly pulling the tow 7 to keep it in a stable and uniform movement in the circulating water tank 1. The washing medium washes the tow 7 from above through the shower branch 42, and the water flow covers the surface of the tow from top to bottom, ensuring that the upper area of ​​the tow 7 is fully cleaned and the solvent residue and impurities on the fiber surface are removed; at the same time, the washing medium flows from below along the running direction of the tow 7 through the outlet branch 43, forming a continuous water flow cycle. This downstream design not only ensures that the water flow can be evenly distributed along the moving direction of the tow, avoiding the generation of dead zones of water flow, but also effectively reduces the mechanical disturbance of the water flow to the tow, protecting the structural integrity and physical properties of the tow.

[0029] Furthermore, the outlet of the water outlet branch 43 is arranged at the upstream position of the water outlet of the shower branch 42 along the running direction of the tow 7. Specifically, the outlet of the water outlet branch 43 is located in front of the water outlet of the shower branch 42, that is, the upstream area of ​​the running direction of the tow 7, and is arranged below the tow 7 in the circulating water tank 1. In this way, when the water flows through the water outlet branch 43, it can flow along the running direction of the tow 7, ensuring that the water flows under the tow 7 to form a continuous downstream flow momentum, thereby enhancing the fluidity and coverage during the washing process.

[0030] In addition, by setting the outlet of the water outlet branch 43 upstream of the outlet of the shower branch 42, the water naturally flows along the movement direction of the tow 7 when passing through the water outlet branch 43, forming a smooth and continuous water flow. This downstream design not only effectively avoids the back and forth disturbance of the water flow in the water tank, reduces the mechanical impact and damage to the tow 7, but also ensures that the water flow can evenly cover the lower area of ​​the entire tow, further improving the uniformity and thoroughness of water washing. In addition, the downstream water flow momentum helps to accelerate the removal of solvents and impurities, improve the water washing efficiency, and ensure the stability and integrity of the fiber tow 7 during the water washing process.

[0031] Furthermore, the circulating water tank 1 has a wire inlet end for feeding the wire, and the outlet of the water outlet branch 43 is arranged close to the wire inlet end of the circulating water tank 1. In this way, the water flowing out of the outlet of the water outlet branch 43 can quickly flow along the running direction of the wire bundle 7, so that the water flow starts to flow downstream when the wire bundle 7 just enters the circulating water tank 1, forming a stable and continuous water flow momentum.

[0032] As an implementation of this embodiment, the water outlet of the water outlet branch 43 is connected to the water outlet nozzle 431. The spray port of the water outlet nozzle 431 is arranged toward the direction in which the filament bundle 7 runs, and is used to spray water in the direction in which the filament bundle 7 runs. In this way, the water outlet nozzle 431 can accurately spray water on the moving path of the filament bundle 7, ensuring that the water flow is consistent with the running direction of the filament bundle 7.

[0033] Specifically, the water outlet nozzle 431 adjusts the spraying angle and the spraying force so that the water can flow smoothly along the running direction of the tow 7. This forward spraying not only improves the coverage and uniformity of water washing, but also effectively reduces the lateral impact of the water flow on the tow 7, reduces the mechanical stress of the tow during the water washing process, and prevents the tow from being damaged such as shrinkage, disorder and twisting.

[0034] As another implementation of this embodiment, wire separators 3 are arranged at intervals along the direction of the running of the filament bundles 7 in the circulating water tank 1, specifically including a first wire separator 31 and a second wire separator 32. The main function of the wire separator 3 is to comb and disperse the strands of filament bundles 7 evenly, ensuring that each filament bundle can be fully covered and cleaned by water flow during the washing process. The first wire separator 31 and the second wire separator 32 are arranged alternately to form multiple independent washing areas. This layout effectively avoids the accumulation and entanglement of the filament bundles in the circulating water tank 1, and keeps the filament bundles 7 neat and uniform.

[0035] The water outlet of the shower branch 42 is arranged between the first wire separator 31 and the second wire separator 32. Since the wire separator 3 combs and disperses the strands of the tow 7 evenly, the water flow can act more evenly on each independent tow when spraying at the water outlet of the shower branch 42. In addition, a flower roller 23 is arranged upstream of the first wire separator 31 to beat the tow 7. The existence of the wire separator 3 effectively reduces the mechanical disturbance of the water flow to the tow 7, avoids mechanical damage such as shrinkage, dislocation and twisting of the tow 7, and maintains the structural integrity and physical properties of the tow 7.

[0036] Furthermore, the shower branch 42 is connected to at least two shower nozzles, namely, the first shower nozzle 421 and the second shower nozzle 422, through a shower nozzle connecting pipe 423. The spray ports of the first shower nozzle 421 and the second shower nozzle 422 respectively constitute the water outlets of the shower branch 42. The first shower nozzle 421 and the second shower nozzle 422 are arranged between the wire separators 3 at intervals along the direction in which the filament bundle 7 runs. Specifically, the first shower nozzle 421 and the second shower nozzle 422 are arranged between the first wire separator 31 and the second wire separator 32.

[0037] By arranging multiple shower nozzles at intervals between the separators 3, the precursor washing equipment can achieve a more uniform and efficient washing effect, ensuring that the fiber bundles 7 are fully and thoroughly cleaned during the washing process. At the same time, the synergistic effect of multiple shower nozzles improves the cleaning capacity of the equipment, adapts to different production scales and washing requirements, and further improves the washing quality and production efficiency of carbon fiber precursors.

[0038] As another implementation of this embodiment, the precursor water washing equipment further includes a circulating heating device 5. The heating part 51 of the circulating heating device 5 is arranged in the circulating water tank 1, and is responsible for heating the water in the circulating water tank 1. Specifically, the heating part 51 is a heating tube structure containing hot water inside, and the heating part 51 performs heat exchange with the water body of the circulating water tank 1 to ensure that the water washing medium is maintained within a preset temperature range during the entire water washing process. This not only increases the temperature of the water washing medium and promotes the dissolution rate of solvents and impurities, but also helps to improve the water washing effect, ensuring that the residual solvents and sodium ions in the carbon fiber precursor 7 are more thoroughly removed.

[0039] In this configuration, the water outlet of the water outlet branch 43, i.e., the water outlet nozzle 431, is arranged at the upstream position of the heating part 51 along the running direction of the tow 7. This means that the water flow sprayed by the water outlet nozzle 431 first flows through the heating part 51 for heating treatment after entering the circulating water tank 1. Through this layout, the water flow sprayed by the water outlet nozzle 431 can be fully heated, which increases the temperature of the washing medium, thereby enhancing the solubility of the solvent and impurities, and further improving the efficiency and effect of the washing.

[0040] At the same time, the water outlet of the shower branch 42 is arranged above the heating part 51, and preferably the first shower nozzle 421 and the second shower nozzle 422 are arranged above the heating part 51. The water flow sprayed from the shower branch 42 can be directly heated by the heating part 51, further enhancing the cleaning ability of the water washing medium and effectively improving the removal efficiency of the solvent and impurities.

[0041] The introduction of the circulating heating device 5 in this embodiment not only optimizes the water temperature control during the water washing process, so that the water washing medium is kept within the ideal temperature range during the whole process, but also improves the uniformity and thoroughness of the water washing effect by heating the water flow. The heated water flow can more effectively penetrate and dissolve the residual solvent and impurities in the fiber tow 7, ensuring the efficiency and stability of the water washing process.

[0042] Example 2 like Figures 1 to 3 As shown, this embodiment provides a carbon fiber precursor production line, which integrates any of the precursor washing devices described in the above technical solutions. Specifically, the carbon fiber precursor production line is composed of a plurality of precursor washing devices arranged in sequence, including a first precursor washing device 101, a second precursor washing device 102, a third precursor washing device 103, a fourth precursor washing device 104, a fifth precursor washing device 105, a sixth precursor washing device 106, a seventh precursor washing device 107, an eighth precursor washing device 108, a ninth precursor washing device 109, a tenth precursor washing device 1010, and an eleventh precursor washing device 1011. These precursor washing devices are arranged in sequence along the running direction of the tow 7 to form a continuous washing process.

[0043] In this production line, the circulating water tanks 1 of the raw silk washing equipment in adjacent positions are interconnected to form a complete water circulation system, and the washing medium can flow smoothly between the various circulating water tanks 1. This not only realizes the efficient use of water resources and reduces water waste, but also ensures the consistency and stability of the water quality of each circulating water tank 1.

[0044] In addition, at least one of the several precursor water washing devices in the carbon fiber precursor production line is equipped with a circulating heating device 5 for heating the water in the circulating water tank 1. The heating part 51 of the circulating heating device 5 is arranged in the circulating water tank 1, which can effectively increase the temperature of the water washing medium, enhance the dissolution rate of the solvent and impurities, and improve the water washing efficiency. The heated water flows smoothly along the direction of the running of the tow 7 through the water outlet nozzle 431 of the water outlet branch 43, ensuring that the water flow has reached the ideal temperature and cleaning effect before the tow enters the next water washing device. This heating design not only improves the thoroughness of the water washing process, but also further reduces the mechanical disturbance of the water flow to the tow 7, avoiding damage to the tow such as shrinkage, dislocation and twisting.

[0045] The entire production line forms a continuous, stable and efficient water washing system through the series connection of multiple raw silk water washing equipment and the efficient connection of the circulating water tank 1. After each water washing equipment completes the preliminary cleaning of the previous equipment, it further performs a fine water washing treatment on the tow 7 to ensure that the solvent residue and impurities are completely removed. The introduction of the circulating heating device 5 allows the water washing medium to always maintain the optimal working temperature throughout the entire production line, further improving the water washing effect and production efficiency.

[0046] Furthermore, if Figure 3 As shown, a first raw silk washing device 101, a second raw silk washing device 102, a third raw silk washing device 103, a fourth raw silk washing device 104, a fifth raw silk washing device 105, a sixth raw silk washing device 106, a seventh raw silk washing device 107, an eighth raw silk washing device 108, a ninth raw silk washing device 109, a tenth raw silk washing device 1010 and an eleventh raw silk washing device 1011 are sequentially arranged along the running direction of the silk bundle 7. These raw silk washing devices are arranged in sequence on the production line to form a continuous washing process.

[0047] In this production line, the first raw silk washing equipment 101, the third raw silk washing equipment 103, the fifth raw silk washing equipment 105, the seventh raw silk washing equipment 107, the tenth raw silk washing equipment 1010, and the eleventh raw silk washing equipment 1011 are respectively provided with a circulating heating device 5. By configuring the circulating heating device 5 in at least the raw silk washing equipment in the interlaced position, the washing medium is repeatedly heated at multiple washing nodes to ensure that the water temperature is always kept within the optimal range during the washing process. This multi-point heating design not only improves the solubility of the washing medium and accelerates the removal of solvents and impurities, but also effectively reduces the temperature gradient difference of the water flow in the circulating water tank 1, ensuring the consistency and stability of the washing process of the entire production line.

[0048] Furthermore, the circulating water circuits of the circulating heating devices 5 of different raw silk washing equipment are connected. Figure 3As shown, the circulating heating device 5 includes a first liquid storage tank 54 and a second liquid storage tank 55. The second liquid storage tank 55 contains hot water medium, and the second liquid storage tank 55 is connected to the second liquid storage tank main liquid outlet pipe 551. The heating part 51 of the circulating heating device 5 of the first raw silk washing equipment 101 is a pipe body containing heat medium inside, and the heating part 51 is connected to the second liquid storage tank main liquid outlet pipe 551 through the first heating part connecting pipeline, so that the hot water medium in the second liquid storage tank 55 is shunted to the first heating part connecting pipeline through the second liquid storage tank main liquid outlet pipe 551, and then flows into the heating part 51 in the first raw silk washing equipment 101, which is used to perform heat exchange on the washing medium in the circulating water tank 1 in the first raw silk washing equipment 101. The first liquid storage tank 54 is connected to the first liquid storage tank main liquid inlet pipe 541, and the heating part 51 of the first raw silk washing equipment 101 is connected to the first liquid storage tank main liquid inlet pipe 541 through the second heating part connecting pipeline. The water flow after heat exchange in the heating part 51 flows through the first liquid storage tank main liquid inlet pipe 541 through the second heating part connecting pipeline and flows back to the first liquid storage tank 54.

[0049] The heating part 51 of the circulating heating device 5 of the third raw silk water washing equipment 103 is a pipe body containing a heat medium inside. The heating part 51 is connected to the second liquid storage tank main outlet pipe 551 through the third heating part connecting pipe, so that the hot water medium in the second liquid storage tank 55 is diverted to the third heating part connecting pipe through the second liquid storage tank main outlet pipe 551, and then flows into the heating part 51 in the third raw silk water washing equipment 103, which is used to perform heat exchange on the washing medium in the circulating water tank 1 in the third raw silk water washing equipment 103. The heating part 51 of the third raw silk water washing equipment 103 is connected to the first liquid storage tank main inlet pipe 541 through the fourth heating part connecting pipe, and the water flow after heat exchange in the heating part 51 flows through the first liquid storage tank main inlet pipe 541 through the fourth heating part connecting pipe and flows back to the first liquid storage tank 54.

[0050] The heating parts 51 of the circulating heating devices 5 of the fifth and seventh silk washing equipment 105 and 107 are respectively connected to the main liquid outlet pipe 551 of the second liquid storage tank, so that the hot water medium in the second liquid storage tank 55 flows into the heating parts 51 of the fifth and seventh silk washing equipment 105 and 107 through the main liquid outlet pipe 551 of the second liquid storage tank, respectively, for heat exchange of the washing medium in the circulating water tank 1 of the fifth and seventh silk washing equipment 105 and 107. The heating parts 51 of the fifth and seventh silk washing equipment 105 and 107 are connected to the main liquid inlet pipe 541 of the first liquid storage tank, and the water flow after heat exchange in the heating parts 51 flows back to the first liquid storage tank 54 through the main liquid inlet pipe 541 of the first liquid storage tank. The tenth and eleventh silk washing equipment 1010 and 1011 can share a group of hot water storage tanks separately.

[0051] Through the above design, the circulating heating device 5 of multiple raw silk washing equipment can achieve unified heat energy management and efficient hot water distribution, ensuring that the washing medium in each washing equipment is always kept within the optimal temperature range. This circulating heating system not only improves the solubility and cleaning efficiency of the washing medium, but also reduces the energy consumption and operating costs of the overall system through centralized management and sharing of thermal energy resources. At the same time, the interconnected circulating water circuit design ensures the consistency of water quality and temperature stability between each washing equipment, further improving the uniformity and reliability of the washing process.

[0052] As an implementation of this embodiment, the carbon fiber precursor production line also includes a recovery tank 6, which is connected to a recovery tank main water inlet pipe 61. The circulating water tank 1 has an overflow tank 11 arranged at both ends thereof, and the upper end opening of the overflow tank 11 is slightly higher than the upper end opening of the circulating water tank 1. When the liquid level in the circulating water tank 1 reaches a certain height, it will overflow to the overflow tank 11. The main function of the overflow tank 11 is to control the water level in the circulating water tank 1 to prevent the water level from being too high, causing equipment overflow or excessive system pressure. The overflow tank 11 is connected to the recovery tank main water inlet pipe 61 through the overflow tank outlet pipe 13, which is used to discharge the washed liquid to the recovery tank 6.

[0053] Further, the first raw silk water washing device 101 is provided with an overflow tank 11 connected to the circulating water tank 1 at one end, and the other end is connected to the circulating water tank liquid inlet pipe 12 of the recovery tank main water inlet pipe 61. The overflow tanks 11 of the circulating water tanks 1 of the second raw silk water washing device 102, the third raw silk water washing device 103, the fourth raw silk water washing device 104, the fifth raw silk water washing device 105, the sixth raw silk water washing device 106, the seventh raw silk water washing device 107, the eighth raw silk water washing device 108, the ninth raw silk water washing device 109, the tenth raw silk water washing device 1010 and the eleventh raw silk water washing device 1011 downstream of the first raw silk water washing device 101 are respectively provided with overflow tank liquid outlet pipes 13 connected to the recovery tank main water inlet pipe 61.

[0054] In this way, the washing liquid in the second raw silk washing equipment 102, the third raw silk washing equipment 103, the fourth raw silk washing equipment 104, the fifth raw silk washing equipment 105, the sixth raw silk washing equipment 106, the seventh raw silk washing equipment 107, the eighth raw silk washing equipment 108, the ninth raw silk washing equipment 109, the tenth raw silk washing equipment 1010 and the eleventh raw silk washing equipment 1011 can be respectively transported to the recovery tank main water inlet pipe 61 through their respective overflow tank outlet pipes 13, and then flow from the recovery tank main water inlet pipe 61 through the circulating water tank inlet pipe 12 back to the first raw silk washing equipment 101 for recycling.

[0055] Alternatively, the washing liquids of the first raw silk washing equipment 101, the second raw silk washing equipment 102, the third raw silk washing equipment 103, the fourth raw silk washing equipment 104, the fifth raw silk washing equipment 105, the sixth raw silk washing equipment 106, the seventh raw silk washing equipment 107, the eighth raw silk washing equipment 108, the ninth raw silk washing equipment 109, the tenth raw silk washing equipment 1010 and the eleventh raw silk washing equipment 1011 can be respectively transported to the recovery tank main water inlet pipe 61 through their respective overflow trough liquid outlet pipes 13, and then transported to the recovery tank 6 through the recovery tank main water inlet pipe 61.

[0056] Preferably, in this embodiment, control valves are respectively provided on the main water inlet pipe 61 of the recovery tank, the liquid outlet pipes 13 of each overflow tank, and the liquid inlet pipe 12 of the circulating water tank.

[0057] This embodiment realizes the automatic discharge and recovery of the washing liquid, optimizes the utilization efficiency of water resources, and reduces water waste. In addition, the design of the overflow tank 11 enables the excess liquid in the washing process to be discharged in time, preventing the potential damage to the equipment caused by the excessive water level in the circulating water tank 1, and improving the overall reliability and operational stability of the system. This connection configuration of the overflow tank 11 and the recovery tank 6 ensures the continuity and efficiency of the washing system during long-term operation, and meets the strict requirements of large-scale carbon fiber production on the washing process.

[0058] As another implementation of this embodiment, the carbon fiber precursor production line further includes a fourth liquid storage tank 1015. The circulating water tank 1 and the overflow tank 11 are respectively connected to the fourth liquid storage tank 1015 through the fourth liquid storage tank inlet pipe 1016, and are used to transport the washed liquid to the fourth liquid storage tank 1015. Specifically, during the washing process, the washing medium in the circulating water tank 1 flows into the fourth liquid storage tank 1015 through the fourth liquid storage tank inlet pipe 1016, and the washed liquid is centrally collected and stored for further processing and reuse.

[0059] The fourth liquid storage tank 1015 is connected to the circulating water tank 1 through the fourth liquid storage tank outlet pipe 1017, and is used to input the heated liquid into the circulating water tank 1. The fourth liquid storage tank outlet pipe 1017 is provided with a second heat exchanger 1018, which is used to heat the liquid flowing through the fourth liquid storage tank outlet pipe 1017. Through the second heat exchanger 1018, the washing medium is effectively heated before entering the circulating water tank 1, ensuring that the water temperature reaches the predetermined working temperature, thereby optimizing the washing effect and improving the removal efficiency of the solvent and impurities. This cycle is repeated to further regulate the water temperature in the circulating water tank 1 and maintain the stability and consistency of the washing medium.

[0060] Further, the fourth liquid storage tank outlet pipe 1017 is preferentially connected to the circulating water tank 1 not equipped with the circulating heating device 5. Further preferably, the fourth liquid storage tank inlet pipe 1016 is connected to the circulating water tank 1 located downstream of the production line, for example, the fourth liquid storage tank inlet pipe 1016 is connected to the circulating water tank 1 of the tenth raw silk water washing equipment 1010 and the eleventh raw silk water washing equipment 1011, and the fourth liquid storage tank outlet pipe 1017 is connected to the circulating water tank 1 upstream of the production line, such as the circulating water tank 1 of the ninth raw silk water washing equipment 109. Through this configuration, the washing medium of the tenth raw silk water washing equipment 1010 and the eleventh raw silk water washing equipment 1011 located downstream is centrally heated by the fourth liquid storage tank 1015, and then flows into the ninth raw silk water washing equipment 109 upstream, ensuring that the washing medium in each circulating water tank 1 works at the optimal temperature, thereby improving the washing efficiency and consistency of the entire production line.

[0061] As an implementation of this embodiment, the carbon fiber precursor production line also includes a third liquid storage tank 1013. The third liquid storage tank 1013 is specifically used to store cleaning water. The third liquid storage tank 1013 is connected to the spray pipe 1012 at the outlet end of the washing device through a connecting pipeline, and is responsible for transporting the stored cleaning water to the spray system.

[0062] The outlet end of the spray pipe 1012 at the outlet end of the washing device is connected to a spray head, which is located at the outlet end of the circulating water tank 1 of the eleventh precursor washing device 1011. The main function of the spray head is to spray and wash the washed tow 7 evenly and efficiently to ensure that the residual solvent and impurities on the surface and inside of the tow are completely removed. The spray head enhances the cleaning ability of the washing medium by spraying the washing water, thereby improving the washing quality and the final performance of the carbon fiber precursor.

[0063] In order to further improve the cleaning effect of the spray water, a first heat exchanger 1014 is provided on the spray pipe 1012 at the outlet end of the water washing device. The function of the first heat exchanger 1014 is to heat the cleaning water flowing through the spray pipe 1012 at the outlet end of the water washing device. By heating, the temperature of the spray water is significantly increased, thereby enhancing the solubility of the solvent and impurities and promoting their more efficient washing. The heated spray water is evenly sprayed on the tow 7 through the spray head, ensuring that the water flow covers the entire surface of the tow, achieving comprehensive and thorough cleaning.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A raw silk washing device, characterized in that: include: Circulating water tank; A guide roller group is arranged above the circulating water tank and is used to draw the yarn bundle; A circulating spray water circuit, wherein the water inlet end is connected to a circulating water tank, and the water outlet end forms at least a flushing branch and a water outlet branch. The water outlet of the flushing branch faces the inside of the circulating water tank and is arranged above the filament bundle for flushing water to the filament bundle. The water outlet of the water outlet branch is arranged below the filament bundle in the circulating water tank towards the direction in which the filament bundle runs, and is used to discharge water in the direction in which the filament bundle runs.

2. A raw silk washing device according to claim 1, characterized in that: The water outlet of the water outlet branch is arranged upstream of the water outlet of the shower branch along the running direction of the silk bundle, and is used for discharging water from the upstream of the silk bundle to the downstream of the silk bundle.

3. A raw silk washing device according to claim 2, characterized in that: The circulating water tank has a wire feeding end for feeding wire, and the water outlet of the water outlet branch is arranged close to the wire feeding end.

4. A raw silk washing device according to any one of claims 1 to 3, characterized in that: The water outlet of the water outlet branch is connected to a water outlet nozzle, and the spray port of the water outlet nozzle is arranged toward the direction in which the filament bundle runs, so as to spray water in the direction in which the filament bundle runs.

5. A raw silk washing device according to any one of claims 1 to 4, characterized in that: The circulating water tank is provided with spaced apart wire separators along the running direction of the wire bundles, and the water outlets of the shower branch are arranged between the spaced apart wire separators.

6. A raw silk washing device according to claim 5, characterized in that: The shower branch is connected to two shower nozzles via at least a connecting pipe, the spray ports of the shower nozzles form the water outlets of the shower branch, and the two shower nozzles are arranged between the wire separators at intervals along the running direction of the yarn bundles.

7. A raw silk washing device according to any one of claims 1 to 6, characterized in that: It also includes a circulating heating device, the heating part of which is arranged in the circulating water tank for heating the water in the circulating water tank, the water outlet of the water outlet branch is arranged upstream of the heating part along the direction of the filament bundle running, and the water outlet of the shower branch is arranged above the heating part.

8. A carbon fiber precursor production line, characterized in that: It comprises the raw silk washing equipment as described in any one of claims 1 to 7.

9. A carbon fiber precursor production line according to claim 8, characterized in that: The method comprises a plurality of the raw silk washing devices arranged in sequence, wherein the circulating water tanks of the raw silk washing devices at adjacent positions are connected to each other, and at least one of the plurality of the raw silk washing devices is provided with a circulating heating device for heating the water in the circulating water tank; Preferably, at least the raw silk washing equipment at the alternate positions among the plurality of raw silk washing equipment are provided with a circulation heating device.

10. A carbon fiber precursor production line according to claim 9, characterized in that: The circulating water paths of the circulating heating devices of different raw silk washing equipment are connected.

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