Carbon fiber precursor water washing device

Abstract

The present invention relates to the technical field of carbon fiber preparation, and in particular to a carbon fiber precursor water washing device, which, on the basis of traditional spraying and rinsing, is additionally provided with a flower wheel and internal self-circulation, overflow, water replenishment and other systems of washing water, which not only meets the water washing process requirements under different spinning processes, but also has more advantages for the water washing effect under high-speed spinning processes. An independent self-circulation system is designed in the water washing tank of the device to achieve the uniformity of the temperature field and the timely diffusion and dilution of the solvent. The design of the final water replenishment, reverse water replenishment and overflow device can realize the continuous replenishment of fresh water in the final water washing tank, the cascade control of the water washing tank, and the step-by-step reverse water replenishment. The carbon fiber precursor water washing device of the present invention has the characteristics of multi-technology integration, which effectively enhances the water washing effect and reduces the energy consumption of the heating system; it reduces the investment cost of equipment and space increased due to the insufficient length and space of the water washing tank, and it can be directly modified on the existing spinning equipment, with obvious advantages.

Description

Technical Field

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

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] During the spinning process of carbon fiber precursor, whether it is wet spinning or dry-jet wet spinning, the residual solvent in the precursor affects the cross-sectional shape and crystalline structure of the fiber, which will ultimately affect the performance of the carbonized carbon fiber. Therefore, a suitable water washing process can remove the residual solvent in the fiber and eliminate the destructive effect on the fiber. There are many factors that affect water washing. The structure of the fiber before washing, the washing temperature, the washing time, etc. directly affect the washing effect. For the washing process, the washing efficiency is required to be high. At present, several domestic industrialized carbon fiber precursor production companies often use a single rinsing or a combination of rinsing and spraying technology, or a laminated water washing device. The laminated device has a better washing effect than the above two methods and has the advantage of a small footprint. However, its biggest disadvantage is that the equipment is complicated and there are too many guide wheels, the tow is easy to close, disorderly and twisted, which affects the washing effect, and the equipment investment is large and the operating cost is high. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the water washing device in the prior art is complicated and cannot meet the requirements of the water washing process. To this end, the invention provides a carbon fiber precursor water washing device, which has high water washing efficiency and adjustable and controllable water washing process; and the equipment investment cost is low, and rapid docking and matching can be achieved on the original equipment; for high-speed spinning under the dry-jet wet process, the water washing effect and operating cost are more advantageous.

[0005] In order to achieve the above-mentioned invention object, the technical means adopted by the present invention are:

[0006] First, the present invention discloses a carbon fiber precursor water washing device, comprising a primary water washing tank, a secondary water washing tank, a primary drafting roller, a secondary drafting roller, a tertiary drafting roller, a flower wheel, a primary internal circulation system, a secondary internal circulation system, a reverse water replenishment system, a new water replenishment system, an overflow system, a primary spray system and a secondary spray system; wherein:

[0007] A primary drafting roller, a secondary drafting roller and a tertiary drafting roller are respectively arranged at both ends of the primary water washing tank and the secondary water washing tank, and the secondary drafting roller is located between the primary water washing tank and the secondary water washing tank; and a flower wheel is arranged in the primary water washing tank and the secondary water washing tank.

[0008] The primary internal circulation system comprises a primary circulation pump and a primary internal circulation pipeline. The primary internal circulation pipeline is separated from the outlet of the primary circulation pump to realize the self-circulation of the washing liquid in the primary washing tank.

[0009] The secondary internal circulation system comprises a secondary circulation pump and a secondary internal circulation pipeline. The secondary internal circulation pipeline is separated from the outlet of the circulation pump to realize the self-circulation of the washing liquid in the secondary washing tank.

[0010] The reverse water replenishment system includes a secondary circulation pump, a primary water replenishment pipeline, a primary flow meter and a pipeline. The primary flow meter is installed on the primary water replenishment pipeline. The primary water washing tank and the secondary water washing tank are connected by a pipeline. The water in the secondary water washing tank enters the primary water washing tank after being powered by the secondary circulation pump and measured by the primary flow meter, thereby completing the reverse water replenishment process.

[0011] The new water replenishment system includes a secondary water replenishment pipeline and a secondary flowmeter. The secondary flowmeter is installed on the secondary water replenishment pipeline. The externally provided deionized pure water enters the secondary water washing tank after being measured by the secondary flowmeter to realize the water replenishment process.

[0012] The overflow system includes an overflow pipeline, a first flowmeter, and a water receiving funnel. The water inlet end of the overflow pipeline extends into the primary water washing tank. The first flowmeter is installed on the overflow pipeline. The water outlet end of the overflow pipeline is outside the primary water washing tank. The water receiving funnel is located below the water outlet end of the overflow pipeline. The reverse replenishment water volume is measured by the first flowmeter and then flows into the water receiving funnel and enters the sewage recovery pipeline system.

[0013] The primary spray system includes a primary spray pipeline and a primary circulation pump, and the primary circulation pump provides spray power; the secondary spray system includes a secondary spray pipeline and a secondary circulation pump, and the secondary circulation pump provides spray power.

[0014] Furthermore, the water outlet end of the first-level water supply pipeline is directed toward the transmission roller of the second-level drafting roller located in the first-level water washing tank, and the water outlet end of the second-level water supply pipeline is directed toward the transmission roller of the third-level drafting roller located in the first-level water washing tank, which helps to further remove the residual solvent on the raw silk.

[0015] Furthermore, the water outlet end of the overflow pipeline faces the transmission roller located outside the primary water washing tank with the primary drafting roller, which helps to use the waste water to be discharged to pre-remove the residual solvent on the raw silk.

[0016] Furthermore, a nozzle is provided at the water outlet end of the first-level water supply pipeline and the water outlet end of the second-level water supply pipeline; a nozzle is provided at the water outlet end of the overflow pipeline.

[0017] Furthermore, the flower wheel is composed of a disc, a round rod, a ceramic bearing and a rotating shaft; the round rod is fixed between two discs to form the outer surface of the flower wheel, and the rotating shaft passes through the central axis of the disc and is connected to the disc through the ceramic bearing to form a "squirrel cage" structure.

[0018] Furthermore, the disc, round rod and rotating shaft are all made of 316 stainless steel, and the surface of the round rod is polished to achieve mirror precision. Optionally, there are 8 round rods evenly distributed on the disc; the washed silk is squeezed on the surface of the flower wheel round rod to open the washed silk and expand the width, making the washing effect stronger.

[0019] Furthermore, the ceramic bearing adopts a silicon nitride full ceramic bearing, which has the characteristics of high temperature resistance, corrosion resistance, wear resistance, oil-free self-lubrication, high speed, etc.

[0020] Optionally, each washing tank can be provided with two, three or more stages of flower wheels according to the process requirements; by fine-tuning the angle of the flower wheels, multiple reciprocating washing can be achieved to improve the washing effect.

[0021] Furthermore, it also includes a fixing seat of the flower wheel, which is composed of two side panels, a bottom plate, a fixing screw, and a fastening nut. The two side panels are fixed at both ends of the bottom plate to form a groove-shaped structure. The bottom plate is fixed to the bottom distribution plate of the washing tank through the fixing screw and the fastening nut. The rotating shaft of the flower wheel is installed on the two side panels. Optionally, each washing tank can be equipped with 2 to 3 flower wheels according to the requirements of the washing process.

[0022] Furthermore, the primary water washing tank and the secondary water washing tank are both equipped with built-in heating coils and automatic temperature control systems to achieve conventional rinsing of the raw silk.

[0023] Furthermore, the first-stage drafting roller, the second-stage drafting roller and the third-stage drafting roller are all roller drafting machines, and the driving roller is made of SS316 stainless steel with a mirror-polished surface, which controls the washing time and the drafting tension of the raw silk bundle in the washing tank.

[0024] Furthermore, N-stage water washing tanks can be added according to the requirements of the water washing process. Each stage of the water washing tank is controlled in cascade, and the rear stage water washing tank meters water to the front stage water washing tank, and finally overflows through the first stage water washing tank.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] (1) The carbon fiber precursor water washing device of the present invention is equipped with a flower wheel and an internal self-circulation, overflow, and water replenishment system for washing water on the basis of traditional spraying and rinsing. It not only meets the water washing process requirements under different spinning processes, but also has more advantages in the water washing effect under high-speed spinning process.

[0027] (2) The unique design of the flower wheel structure of the present invention can realize the adjustability and controllability of the water washing process; it can realize the continuous operation of the water washed silk under the state of extrusion, fiber opening and expansion, and improve the water washing effect.

[0028] (3) The independent self-circulating system in the water washing tank of the present invention realizes the uniformity of the temperature field and the timely diffusion and dilution of the solvent. The design of the final water replenishment, reverse water replenishment and overflow device can realize the continuous replenishment of fresh water in the final water washing tank, the cascade control of the water washing tank, and the step-by-step reverse water replenishment. Through the overflow system of the first water washing tank, the dynamic balance of water replenishment, reverse water replenishment and overflow of the entire water washing system is ensured; and the solvent content in the water washing tank is kept at an extremely low level.

[0029] (4) The carbon fiber precursor water washing device of the present invention has the characteristics of multi-technology integration, which effectively enhances the water washing effect and reduces the energy consumption of the heating system; it reduces the investment cost of equipment and space increased due to the insufficient length and space of the water washing tank, and it can be directly modified on the existing spinning equipment, which has obvious advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings in the specification, which constitute a part of the present invention, 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 and do not constitute improper limitations on the present invention.

[0031] Figure 1 Schematic diagram of the structure of the carbon fiber precursor water washing device in an embodiment of the present invention.

[0032] Figure 2 Schematic diagram of the structure inside the flower wheel in an embodiment of the present invention.

[0033] Figure 3 Schematic diagram of the structure of the fixing base in the embodiment of the present invention.

[0034] The marks in the above drawings represent respectively: 1-primary water washing tank, 2-secondary water washing tank, 3-primary drafting roller, 4-secondary drafting roller, 5-third-stage drafting roller, 6-flower wheel, 7-primary circulation pump, 8-primary internal circulation road, 9-secondary circulation pump, 10-secondary internal circulation pipeline, 11-primary water supply pipeline, 12-primary flow meter, 15-secondary water supply pipeline, 16-secondary flow meter, 19-overflow pipeline, 20-first flow meter, 21-water receiving funnel, 22-primary spray pipeline, 23-secondary spray pipeline, 24-disc, 25-round rod, 26-ceramic bearing, 27-rotating shaft, 28-panel, 29-bottom plate, 30-fixing screw, 31-nut, 13, 14, 17, 18-auxiliary valve. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element needs to have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0038] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] As mentioned above, the prior art has the problem that the water washing device is complicated and cannot meet the requirements of the water washing process. To this end, a carbon fiber precursor water washing device is invented, and the invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0040] First embodiment ,refer to Figure 1 , an example of a carbon fiber precursor water washing device designed by the present invention includes a primary water washing tank 1, a secondary water washing tank 2, a primary drafting roller 3, a secondary drafting roller 4, a tertiary drafting roller 5, a flower wheel 6, a primary internal circulation system, a secondary internal circulation system, a reverse water replenishment system, a new water replenishment system, an overflow system, a primary spraying system and a secondary spraying system.

[0041] The first-stage water washing tank 1 and the second-stage water washing tank 2 are respectively provided with a first-stage drafting roller 3, a second-stage drafting roller 4, and a third-stage drafting roller 5, and the second-stage drafting roller 4 is located between the first-stage water washing tank 1 and the second-stage water washing tank 2; the first-stage water washing tank 1 and the second-stage water washing tank 2 are both provided with a flower wheel 6. The first-stage water washing tank and the second-stage water washing tank are both built-in with heating coils and automatic temperature control systems to achieve conventional rinsing of the raw silk. The first-stage drafting roller, the second-stage drafting roller, and the third-stage drafting roller are all 5-roller drafting machines, and the driving roller is made of SS316 stainless steel with a mirror-polished surface, which controls the washing time and drafting tension of the raw silk bundle in the water washing tank.

[0042] The primary internal circulation system comprises a primary circulation pump 7 and a primary internal circulation pipeline 8. The primary internal circulation pipeline 8 is separated from the outlet of the primary circulation pump 7 to realize the self-circulation of the washing liquid in the primary washing tank.

[0043] The secondary internal circulation system comprises a secondary circulation pump 9 and a secondary internal circulation pipeline 10. The secondary internal circulation pipeline 10 is branched from the outlet of the circulation pump 9 to realize the self-circulation of the washing liquid in the secondary washing tank.

[0044] The reverse water replenishment system includes a secondary circulation pump 9, a primary water replenishment pipeline 11, a primary flowmeter 12 and a pipeline. The primary flowmeter 12 is installed on the primary water replenishment pipeline 11. The primary water washing tank and the secondary water washing tank are connected by a pipeline. The water in the secondary water washing tank enters the primary water washing tank after being powered by the secondary circulation pump and measured by the primary flowmeter, completing the reverse water replenishment process. This process is diverted and regulated by auxiliary valves 13 and 14.

[0045] The new water replenishment system includes a secondary water replenishment pipeline 15 and a secondary flowmeter 16. The secondary flowmeter 16 is installed on the secondary water replenishment pipeline 15. The deionized pure water provided from the outside enters the secondary water washing tank after being measured by the secondary flowmeter 16 to realize the water replenishment process. This process is regulated by auxiliary valves 17 and 18. The water replenishment amount of the secondary water washing tank, the reverse water replenishment amount of the primary water washing tank and the overflow amount of the primary water washing tank (5) are consistent, realizing dynamic balance, ensuring that the solvent content in the water washing tank is kept at an extremely low level, and enhancing the effectiveness of water washing.

[0046] The overflow system includes an overflow pipe 19, a first flowmeter 20, and a water receiving funnel 21. The water inlet end of the overflow pipe 15 extends into the primary water washing tank 1. The first flowmeter 20 is installed on the overflow pipe 15. The water outlet end of the overflow pipe 15 is outside the primary water washing tank. The water receiving funnel 21 is located below the water outlet end of the overflow pipe. The reverse replenishment water volume is measured by the first flowmeter 20 and flows into the water receiving funnel and enters the sewage recovery pipe system. A dynamic balance between the reverse replenishment volume and the overflow volume is achieved to ensure that the tow undergoes the water washing process and the solvent residue is within a controllable process range.

[0047] The primary spray system includes a primary spray pipeline 22 and a primary circulation pump 7, and the primary circulation pump 7 provides spray power; the secondary spray system includes a secondary spray pipeline 23 and a secondary circulation pump 9, and the secondary circulation pump provides spray power.

[0048] It is understandable that, based on the first embodiment, technical solutions including but not limited to the following may be derived to solve different technical problems and achieve different invention purposes. Specific examples are as follows:

[0049] Second embodiment The outlet end of the primary water supply pipeline 11 is oriented toward the transmission roller of the secondary drafting roller 4 located in the primary water washing tank 1, and the outlet end of the secondary water supply pipeline 15 is oriented toward the transmission roller of the tertiary drafting roller 5 located in the primary water washing tank 1. This design is helpful to further remove the residual solvent on the raw silk. The outlet end of the overflow pipeline 15 is oriented toward the transmission roller of the secondary drafting roller 3 located outside the primary water washing tank 1, which is helpful to pre-remove the residual solvent on the raw silk by using the waste water to be discharged.

[0050] Third embodiment The outlet ends of the primary water supply pipeline 11 and the secondary water supply pipeline 15 are both provided with nozzles, through which the newly added water is sprayed on the raw silk that is about to be output from the corresponding water washing tank 1, which helps to further remove the residual solvent on the raw silk. The outlet ends of the overflow pipeline 15 are both provided with nozzles, through which the waste water to be discharged is pre-sprayed on the raw silk that is about to enter the primary water washing tank 1, which helps to pre-remove the residual solvent on the raw silk.

[0051] Fourth embodiment ,refer to Figure 2 , the flower wheel 6 is composed of a disc 24, a round rod 25, a ceramic bearing 26 and a rotating shaft 27; 10 round rods 25 are evenly fixed between two discs 24 to form a circular outer surface of the flower wheel, and the rotating shaft 27 passes through the central axis of the disc and is connected to the disc 25 through the ceramic bearing 26 to form a "squirrel cage" structure. The material of the disc, round rod and rotating shaft 27 are all 316 stainless steel, and the surface of the round rod is polished to achieve mirror accuracy. The ceramic bearing 26 adopts silicon nitride full ceramic bearing, which has the characteristics of high temperature resistance, corrosion resistance, wear resistance, oil-free self-lubrication, high speed, etc. The washed silk is squeezed on the surface of the flower wheel round rod, so that the washed silk is opened and expanded, and the washing effect is stronger. The round rod 25 plays the role of squeezing, opening and expanding the washed silk; the flower wheel with a "squirrel cage" structure rotates under the traction of the washed silk, disturbing the water flow, and strengthening the washing effect.

[0052] Fifth embodiment ,refer to Figure 3, and also includes a fixing seat of the flower wheel 6, which is composed of two side panels 28, a bottom plate 29, a fixing screw 30, and a fastening nut 31. The two side panels 28 are fixed at both ends of the bottom plate 29 to form a groove-shaped structure. The bottom plate 29 is fixed to the bottom distribution plate of the washing tank through the fixing screw 30 and the fastening nut 31. The rotating shaft 27 of the flower wheel is installed on the two side panels. Under the action of the fixing screw and the fastening nut, the flower wheel and the fixing seat can realize the adjustable and controllable angle of the washed silk during multi-pass reciprocating washing.

[0053] Sixth embodiment Taking 3K carbon fiber precursor washing as an example, the application of the carbon fiber precursor washing device designed by the present invention is illustrated, wherein the circulating pump is a SS304 stainless steel chemical centrifugal pump, the pump body has a temperature resistance of ≤120 degrees, a head of 8 meters, and a motor power of 0.55 kilowatts. The primary circulating pump realizes the self-circulation, spraying, rinsing and overflow functions of the water in the primary washing tank; the secondary circulating pump realizes the self-circulation, spraying, rinsing and reverse water replenishment functions of the water in the secondary washing tank. The specific process is as follows:

[0054] Application 1: Spinning speed is set at 150 m / min; eight-stage washing tank, cascade control; each washing tank is equipped with a centrifugal pump to achieve continuous self-circulation, spraying, water replenishment and overflow of the washing tank, and the flow rate is set to 30L / H; the temperature of the eight-stage washing tank is 40℃~80℃, with a temperature gradient distribution. The primary fiber in one bath is drawn by the eight-stage drafting roller and enters the first to eighth-stage washing tanks for washing in turn. The raw silk is tested and the solvent residue is 450PPM.

[0055] Application 2: Spinning speed is set at 150 m / min; eight-stage washing tank, cascade control; two-stage washing wheel is added to each washing tank; one-stage centrifugal pump is added to each washing tank to achieve continuous self-circulation, spraying, water replenishment and overflow of the washing tank, and the flow rate is set to 30L / H; the temperature of the eight-stage washing tank is 40℃~80℃, with temperature gradient distribution. The primary fiber of one bath enters the first to eighth washing tanks in sequence under the traction of the eight-stage drafting roller. Each washing tank through which the washed silk passes reciprocates three times through the washing wheel. The raw silk is tested and the solvent residue is 98PPM.

[0056] Application 3: Spinning speed is set at 150 m / min; eight-stage washing tank, cascade control; two-stage washing wheel is added to each washing tank; one-stage centrifugal pump is added to each washing tank to achieve continuous self-circulation, spraying, water replenishment and overflow of the washing tank, and the flow rate is set to 60L / H; the temperature of the eight-stage washing tank is 40℃~80℃, with temperature gradient distribution. The primary fiber in one bath enters the first to eighth washing tanks in turn under the traction of the eight-stage drafting roller. Each washing tank through which the washed silk passes reciprocates three times through the washing wheel. The raw silk is tested and the solvent residue is 43PPM.

[0057] It can be seen that the above-mentioned raw silk has low residual solvent content and fully meets the water washing requirements.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A carbon fiber precursor washing device, characterized in that: It includes a primary water washing tank, a secondary water washing tank, a primary drafting roller, a secondary drafting roller, a tertiary drafting roller, a flower wheel, a primary internal circulation system, a secondary internal circulation system, a reverse water replenishment system, a new water replenishment system, an overflow system, a primary spray system and a secondary spray system; the primary water washing tank and the secondary water washing tank are respectively provided with a primary drafting roller, a secondary drafting roller and a tertiary drafting roller at both ends, and the secondary drafting roller is located between the primary water washing tank and the secondary water washing tank; the primary water washing tank and the secondary water washing tank are both provided with a flower wheel; the primary internal circulation system includes a primary circulation pump and a primary internal circulation pipeline, and the primary internal circulation pipeline is separated from the outlet of the primary circulation pump to realize the self-circulation of the washing liquid in the primary water washing tank; the secondary internal circulation system includes a secondary circulation pump and a secondary internal circulation pipeline, and the secondary internal circulation pipeline is separated from the outlet of the circulation pump to realize the self-circulation of the washing liquid in the secondary water washing tank; The reverse water replenishment system includes a secondary circulation pump, a primary water replenishment pipeline, a primary flowmeter and a pipeline, wherein the primary flowmeter is installed on the primary water replenishment pipeline, the primary water washing tank and the secondary water washing tank are connected by a pipeline, and the secondary circulation pump provides power; the new water replenishment system includes a secondary water replenishment pipeline and a secondary flowmeter, wherein the secondary flowmeter is installed on the secondary water replenishment pipeline; The overflow system includes an overflow pipeline, a first flow meter, and a water receiving funnel. The water inlet end of the overflow pipeline extends into the primary water washing tank. The first flow meter is installed on the overflow pipeline. The water outlet end of the overflow pipeline is outside the primary water washing tank. The water receiving funnel is located below the water outlet end of the overflow pipeline. The primary spray system includes a primary spray pipeline and a primary circulation pump, and the primary circulation pump provides spray power. The secondary spray system includes a secondary spray pipeline and a secondary circulation pump, and the secondary circulation pump provides spray power. The flower wheel is composed of a disc, a round rod, a ceramic bearing and a rotating shaft; the round rod is fixed between two discs to form the outer surface of the flower wheel, the rotating shaft passes through the central axis of the disc and is connected to the disc through the ceramic bearing to form a "squirrel cage" structure, and the flower wheel of the "squirrel cage" structure rotates under the traction of the washed silk to disturb the water flow; The disc, round rod and rotating shaft are all made of 316 stainless steel, and the surface of the round rod is polished to achieve mirror finish. There are 8 round rods evenly distributed on the disc; The ceramic bearing adopts a silicon nitride full ceramic bearing; In each washing tank, 2 to 3 flower wheels are added according to the washing process requirements; It also includes a fixing seat for the flower wheel, which is composed of two side panels, a bottom plate, a fixing screw and a fastening nut. The two side panels are fixed at both ends of the bottom plate to form a groove-shaped structure. The bottom plate is fixed to the distribution plate at the bottom of the washing tank by fixing screws and fastening nuts. The rotating shaft of the flower wheel is installed on the two side panels.

2. The carbon fiber precursor water washing device according to claim 1, characterized in that: The water outlet end of the primary water supply pipeline faces the transmission roller of the secondary drafting roller located in the primary water washing tank.

3. The carbon fiber precursor washing device according to claim 1, characterized in that: The water outlet end of the secondary water supply pipeline faces the transmission roller of the tertiary drafting roller located in the primary water washing tank.

4. The carbon fiber precursor washing device according to claim 1, characterized in that: The water outlet end of the overflow pipeline faces the transmission roller located outside the primary water washing tank with the primary drafting roller.

5. The carbon fiber precursor washing device according to claim 1, characterized in that: The water outlet end of the first-level water supply pipeline and the water outlet end of the second-level water supply pipeline are both provided with nozzles.

6. The carbon fiber precursor water washing device according to claim 1, characterized in that: A nozzle is arranged at the water outlet end of the overflow pipeline.

7. The carbon fiber precursor washing device according to any one of claims 1 to 6, characterized in that: The primary water washing tank and the secondary water washing tank are both equipped with a heating coil and an automatic temperature control system.

8. The carbon fiber precursor washing device according to any one of claims 1 to 6, characterized in that: The primary drafting roller, the secondary drafting roller and the tertiary drafting roller are all roller drafting machines.

9. The carbon fiber precursor washing device according to any one of claims 1 to 6, characterized in that: The transmission roller is made of SS316 stainless steel with mirror polished surface.

10. The carbon fiber precursor water washing device according to any one of claims 1 to 6, characterized in that: According to the requirements of the water washing process, N-stage water washing tanks are added. Each stage of the water washing tank is controlled in cascade. The rear stage water washing tank measures and replenishes water to the front stage water washing tank, and finally overflows through the first stage water washing tank.

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