Polyamide fiber degradation and detection device

Abstract

The invention relates to the technical field of polyamide fiber degradation and detection equipment, in particular to a polyamide fiber degradation and detection device. According to the technical scheme, the polyamide fiber degradation and detection device comprises a seawater storage tank, an auxiliary storage tank is arranged on one side of the seawater storage tank, an air blower is arranged on one side of a degradation tank, and a second valve is arranged on one side of the seawater storage tank; an automatic control system is adopted, a seawater environment can be accurately simulated, an experimental environment close to ocean conditions is provided for degradation research of polyamide fibers, the experimental efficiency is improved, and meanwhile the reliability and applicability of experimental results are ensured; the shape change of the polyamide fiber in the degradation process can be monitored in real time, in-situ observation and continuous recording are achieved, and the limitation that a sample needs to be taken out for offline analysis is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of degradation and detection equipment for polyamide fibers, and particularly to a degradation and detection device for polyamide fibers. Background Art

[0002] Polyamide fibers (such as nylon) are the world's first industrialized synthetic fibers, with excellent toughness, wear resistance, cold resistance, non-toxicity, easy molding, easy dyeing, high mechanical strength and other comprehensive properties. They are a kind of polymer material widely used in the textile, fishery and industrial fields. With the growth of the consumption demand for polyamide fibers, the corresponding waste materials are also increasing, causing serious harm to the environment and the ecosystem.

[0003] Regarding the research on the degradation of polyamide fibers, currently, it mainly relies on laboratory simulation environments. However, existing equipment often cannot simultaneously achieve precise control of the degradation process and detection of degradation products. Existing patents have provided devices for polymer degradation. Patent CN 119269483 A can use a color recognition sensor to calculate the plastic solubility through the color reaction that occurs after microplastics are combined with colloidal gold, and then mix the microplastic liquid with the bacterial liquid for degradation. Patent CN 118950681 A provides a degradation device and its treatment method for promoting the rapid degradation of biomass fibers, mainly through crushing and degradation liquid treatment. However, in these devices and methods, most only involve degradation equipment. In addition, for chemically synthesized fiber products, solid residues usually need to be taken out for off-line analysis, and the degradation process is not monitored in real time. Therefore, developing a device that integrates the functions of seawater degradation and solid residue detection has become an urgent need in current research, providing strong technical support for studying the degradation mechanism of polyamide fibers and having important scientific significance and application value. Summary of the Invention

[0004] In order to overcome the problem that traditional polyamide fiber degradation devices generally use crushing and degradation liquid for treatment, but in these devices and methods, most only involve degradation equipment. In addition, for chemically synthesized fiber products, solid residues usually need to be taken out for off-line analysis, and the degradation process is not monitored in real time.

[0005] The technical solution of the present invention is: a degradation and detection device for polyamide fibers, including a seawater storage tank, with an auxiliary agent storage tank arranged on one side of the seawater storage tank, a blower arranged on one side of the degradation tank, a second valve arranged on one side of the seawater storage tank, the other end of the second valve is provided with the degradation tank, a first valve is arranged on one side of the auxiliary agent storage tank, a sixth valve is arranged on one side of the blower, a fifth valve is arranged on the top surface of the blower, the top end of the fifth valve is provided with a third valve, and a fourth valve is arranged on one side of the third valve.

[0006] Preferably, seawater for degradation experiments is stored in a seawater storage tank, various additives required during the degradation process are stored in an additive storage tank, and a blower is used to provide a gas source to ensure sufficient dissolved oxygen in the degradation tank. The on-off of each pipeline and fluid is controlled by the first valve, second valve, third valve, fourth valve, fifth valve, and sixth valve to ensure the flexibility and controllability of the experimental system. The degradation tank holds seawater and fiber samples for degradation experiments.

[0007] Preferably, a pH, temperature, salinity, and dissolved oxygen content detection system is provided on the top surface of the degradation tank, a carbon dioxide concentration detector is provided on the inner side of the degradation tank, an air diffuser pipe is provided on the inner bottom surface of the degradation tank, a lifting track is provided on the other side of the degradation tank, a degradation lifting platform is provided on one side of the lifting track, a first microscope probe is provided at one end of the degradation lifting platform, and a first conveyor belt is provided on the top surface of the degradation tank. During use, the pH value, temperature, salinity, and dissolved oxygen content of the seawater in the degradation tank are monitored in real time by the pH, temperature, salinity, and dissolved oxygen content detection system to ensure the stability and accuracy of the experimental environment. The concentration of carbon dioxide during the degradation process is monitored in real time by the carbon dioxide concentration detector for a preliminary judgment of the degradation degree. The air diffuser pipe is connected to the blower to introduce air into the degradation tank to increase the dissolved oxygen content of the seawater. The lifting movement of the degradation lifting platform is guided by the lifting track, and the immersion depth of the polyamide fiber sample in the degradation tank is adjusted by the degradation lifting platform. The degraded fiber sample is conveyed by the first conveyor belt, and the state change of the fiber sample in seawater during the degradation process is observed and recorded in real time by the first microscope probe.

[0008] Preferably, a cleaning liquid storage tank is provided on one side of the first conveyor belt, a cleaned liquid collection tank is provided above the cleaning liquid storage tank, a cleaning table is provided at the bottom end of the first conveyor belt, a cleaning liquid spraying device is provided on the inner top surface of the cleaning liquid storage tank, and a second conveyor belt is provided on the other side of the cleaning liquid storage tank. During use, the cleaning liquid for cleaning the fiber sample is stored in the cleaning liquid storage tank, the liquid after cleaning the fiber sample is collected by the cleaned liquid collection tank for subsequent analysis of degradation products, the fiber sample is supported by the cleaning table for cleaning operations, the cleaning liquid is evenly sprayed onto the fiber sample by the cleaning liquid spraying device for cleaning, and the degraded fiber sample is conveyed from the cleaning table to the drying weight sensor by the second conveyor belt.

[0009] Preferably, the other end of the second conveyor belt is provided with a drying box. The top surface of the drying box is provided with a circulation fan. One side of the circulation fan is provided with an exhaust port. One side inside the drying box is provided with a heating pipe. One side of the drying box is provided with a heat insulation layer. The bottom surface of the second conveyor belt is provided with a drying weight sensor. The inside of the drying box is provided with a second lighting system. Below the second lighting system is provided with a second microscope probe. During use, the surface morphology of the solid residue after drying the fiber sample during degradation is observed and recorded in real time through the second microscope probe. The heat loss during the drying process is reduced through the heat insulation layer to improve the drying efficiency. The heating pipe provides a heat source for the drying weight sensor to dry the fiber sample. The drying weight sensor supports the fiber sample during the drying process and its weight change is monitored in real time through the weight sensor. The second lighting system provides necessary lighting conditions for the degradation and observation processes. The circulation fan forms a circulating air flow inside the drying box to improve the drying efficiency. The moisture and harmful gases generated during the drying process are discharged through the exhaust port. The drying box houses the drying weight sensor and the heating pipe to perform the drying operation of the fiber sample.

[0010] Preferably, when a polyamide fiber degradation and detection device is in use, it includes the following steps: S101: First, set the degradation environment and place the polyamide fiber sample. S102: Monitor the degradation process of the polyamide fiber sample in real time and record the degradation process. S103: After degradation is completed, wash the solid residue after degradation. S104: Dry the solid residue and continuously record the weight of the solid residue. S105: After drying is completed, observe and analyze the surface morphology of the solid residue.

[0011] Preferably, when setting the degradation environment and placing the fiber, it includes the following steps: S201: Place the polyamide fiber sample on a degradation lifting platform with adjustable height. S202: Adjust the height of the degradation lifting platform through the lifting track to adjust the depth of the fiber sample immersed in seawater. S203: Start the seawater storage tank to make the seawater circulate in the degradation tank. S204: According to the preset experimental conditions, add an appropriate amount of degradation aid to the seawater through the aid storage tank. S205: Start the first lighting system and the aeration pipe, and adjust the light intensity and aeration volume to simulate the marine environment.

[0012] Preferably, when monitoring and recording the degradation process in real time, it includes the following steps: S301: Use the pH, temperature, salinity, and dissolved oxygen content detection system to record the state parameters of seawater in real time; S302: According to the changes in the state of seawater, the additive storage tank and the aeration pipe are automatically adjusted to ensure the stability of the experiment; S303: Start the first microscope probe regularly to observe and photograph the fiber samples in seawater in real time and record their morphological changes; S304: The carbon dioxide concentration detector monitors and records the carbon dioxide content in the degradation tank in real time to preliminarily judge the degree of degradation.

[0013] Preferably, when cleaning the solid-phase residue after degradation, the following steps are included: S401: According to the set time interval, the degradation lifting platform rises to the position of the first conveyor belt to convey the fiber sample to the cleaning table; S402: The cleaning liquid spraying device above the cleaning table is connected to the cleaning liquid storage tank, and ultrapure water or organic reagents are used to clean the substances attached to the fiber surface by spraying; S403: The liquid after cleaning is filtered through a filter screen and collected in the liquid collection tank after cleaning for subsequent analysis of degradation products.

[0014] Preferably, when drying and weighing the solid-phase residue, the following steps are included: S501: The cleaned fiber solid-phase residue is conveyed to the drying and weighing sensor through the second conveyor belt; S502: Start the heating tube for heating and drying, and the drying and weighing sensor monitors the weight of the solid-phase residue in real time; S503: After the weight remains unchanged for a certain period of time, record the weight of the solid-phase residue to analyze the weight loss rate of the fiber.

[0015] Preferably, when observing and analyzing the surface morphology of the solid-phase residue, the following steps are included: S601: After drying, start the second microscope probe and the second lighting system to photograph and record the dried solid-phase residue; S602: Transmit the shooting results to the central control system to form an image for observing the surface changes of the degraded fiber; S603: According to the image analysis results and combined with the weight detection data, comprehensively judge the degradation degree of the polyamide fiber.

[0016] Advantages of the present invention: By adopting an automated control system, it can accurately simulate the seawater environment to provide an experimental environment close to marine conditions for the degradation research of polyamide fibers, improving the experimental efficiency while ensuring the reliability and applicability of experimental results. At the same time, through the microscope observation system and camera, it can monitor the morphological changes of polyamide fibers during the degradation process in real time, realizing in-situ observation and continuous recording, avoiding the limitation of taking out samples for off-line analysis. Through the drying system and solid-phase residue detection module, it can analyze the weight change of the degraded solid-phase residue, accurately judge the degradation degree of polyamide fibers, and provide a scientific basis for studying the degradation mechanism. Through simulating the seawater environment, real-time monitoring, precise detection and multi-functional integration, it provides an efficient and reliable technical means for the research of the degradation behavior of polyamide fibers, also provides technical support for the development of degradable environmental protection materials, and at the same time provides a scientific basis for the treatment and prevention of marine microplastic pollution, having important environmental significance and social value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic three-dimensional structure diagram of a polyamide fiber degradation and detection device of the present invention; Figure 2 Shown is a schematic first internal three-dimensional structure diagram of a polyamide fiber degradation and detection device of the present invention; Figure 3 Shown is a schematic second internal three-dimensional structure diagram of a polyamide fiber degradation and detection device of the present invention; Figure 4 Shown is a schematic diagram of the degradation environment setting and fiber placement process of a polyamide fiber degradation and detection device of the present invention; Figure 5 Shown is a schematic diagram of real-time monitoring and recording during the degradation process of a polyamide fiber degradation and detection device of the present invention; Figure 6 Shown is a schematic diagram of cleaning the solid-phase residue after degradation of a polyamide fiber degradation and detection device of the present invention; Figure 7 Shown is a schematic diagram of the drying and weight detection process of the solid-phase residue of a polyamide fiber degradation and detection device of the present invention; Figure 8 Shown is a schematic diagram of the surface morphology observation and analysis process of the solid-phase residue of a polyamide fiber degradation and detection device of the present invention.

[0018] Description of reference numerals: 1. Seawater storage tank; 2. Auxiliary agent storage tank; 3. Detection system for pH, temperature, salinity and dissolved oxygen content; 4. Carbon dioxide concentration detector; 5. Aeration pipe; 6. Blower; 7. Degradation lifting platform; 8. First conveyor belt; 9. Lifting track; 10. First microscope probe; 11. First valve; 12. Second valve; 13. Third valve; 14. Fourth valve; 15. Fifth valve; 16. Sixth valve; 17. First lighting system; 18. Degradation tank; 19. Cleaning liquid collection tank after cleaning; 20. Cleaning liquid storage tank; 21. Cleaning table; 22. Cleaning liquid spraying device; 23. Second conveyor belt; 24. Second microscope probe; 25. Thermal insulation layer; 26. Heating pipe; 27. Drying weight sensor; 28. Second lighting system; 29. Circulation fan; 30. Exhaust port; 31. Drying box. Detailed implementation mode

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please refer to Figures 1-3 , the present invention provides an embodiment: a device for degrading and detecting polyamide fibers, including a seawater storage tank 1, an auxiliary agent storage tank 2 is arranged on one side of the seawater storage tank 1, a blower 6 is arranged on one side of the degradation tank 18, a second valve 12 is arranged on one side of the seawater storage tank 1, the other end of the second valve 12 is provided with the degradation tank 18, a first valve 11 is arranged on one side of the auxiliary agent storage tank 2, a sixth valve 16 is arranged on one side of the blower 6, a fifth valve 15 is arranged on the top surface of the blower 6, the top end of the fifth valve 15 is provided with a third valve 13, and a fourth valve 14 is arranged on one side of the third valve 13.

[0021] Preferably, the seawater for the degradation experiment is stored through the seawater storage tank 1, various auxiliary agents required during the degradation process are stored through the auxiliary agent storage tank 2, a gas source is provided through the blower 6 to ensure sufficient dissolved oxygen in the degradation tank, the on-off of each pipeline and fluid is controlled through the first valve 11, the second valve 12, the third valve 13, the fourth valve 14, the fifth valve 15 and the sixth valve 16 to ensure the flexibility and controllability of the experimental system, and the seawater and fiber samples are accommodated through the degradation tank 18 for the degradation experiment.

[0022] Preferably, a detection system 3 for pH, temperature, salinity, and dissolved oxygen content is provided on the top surface of the degradation tank 18. A carbon dioxide concentration detector 4 is provided inside the degradation tank 18. An air diffuser pipe 5 is provided on the inner bottom surface of the degradation tank 18. A lifting track 9 is provided on the other side of the degradation tank 18. A degradation lifting platform 7 is provided on one side of the lifting track 9. A first microscope probe 10 is provided at one end of the degradation lifting platform 7. A first conveyor belt 8 is provided on the top surface of the degradation tank 18. During use, the pH value, temperature, salinity, and dissolved oxygen content of the seawater in the degradation tank are monitored in real time by the detection system 3 for pH, temperature, salinity, and dissolved oxygen content to ensure the stability and accuracy of the experimental environment. The concentration of carbon dioxide during the degradation process is monitored in real time by the carbon dioxide concentration detector 4 for a preliminary judgment of the degradation degree. The air diffuser pipe 5 is connected to a blower 6 to introduce air into the degradation tank to increase the dissolved oxygen content of the seawater. The lifting movement of the degradation lifting platform 7 is guided by the lifting track 9. The immersion depth of the polyamide fiber sample in the degradation tank is adjusted by the degradation lifting platform 7. The degraded fiber sample is conveyed by the first conveyor belt 8. The state change of the fiber sample in the seawater during the degradation process is observed and recorded in real time by the first microscope probe 10.

[0023] Preferably, a cleaning liquid storage tank 20 is provided on one side of the first conveyor belt 8. A cleaned liquid collection tank 19 is provided above the cleaning liquid storage tank 20. A cleaning table 21 is provided at the bottom end of the first conveyor belt 8. A cleaning liquid spraying device 22 is provided on the inner top surface of the cleaning liquid storage tank 20. A second conveyor belt 23 is provided on the other side of the cleaning liquid storage tank 20. During use, the cleaning liquid for cleaning the fiber sample is stored in the cleaning liquid storage tank 20. The liquid after cleaning the fiber sample is collected by the cleaned liquid collection tank 19 for subsequent analysis of the degradation products. The fiber sample is supported by the cleaning table 21 for cleaning operations. The cleaning liquid is evenly sprayed onto the fiber sample by the cleaning liquid spraying device 22 for cleaning. The degraded fiber sample is conveyed from the cleaning table 21 to a drying weight sensor 27 by the second conveyor belt 23.

[0024] Preferably, the other end of the second conveyor belt 23 is provided with a drying oven 31. The top surface of the drying oven 31 is provided with a circulating fan 29. One side of the circulating fan 29 is provided with an exhaust port 30. One side inside the drying oven 31 is provided with a heating pipe 26. One side of the drying oven 31 is provided with a heat insulation layer 25. The bottom surface of the second conveyor belt 23 is provided with a drying weight sensor 27. The inside of the drying oven 31 is provided with a second lighting system 28. Below the second lighting system 28 is provided with a second microscope probe 24. During use, the surface morphology of the solid-phase residue after drying the fiber sample during the degradation process is observed and recorded in real time through the second microscope probe 24. The heat loss during the drying process is reduced through the heat insulation layer 25 to improve the drying efficiency. The heating pipe 26 provides a heat source for the drying weight sensor 27 to dry the fiber sample. The drying weight sensor 27 supports the fiber sample during the drying process and its weight change is monitored in real time through the weight sensor. The second lighting system 28 provides necessary lighting conditions for the observation process. The circulating fan 29 forms a circulating air flow inside the drying oven 31 to improve the drying efficiency. The moisture and harmful gases generated during the drying process are discharged through the exhaust port 30. The drying oven 31 houses the drying weight sensor 27 and the heating pipe 26 to perform the drying operation of the fiber sample.

[0025] Please refer to Figures 4-8 , in this embodiment, when a polyamide fiber degradation and detection device is in use, it includes the following steps: S101: First, set the degradation environment and place the polyamide fiber sample; S102: Monitor the degradation process of the polyamide fiber sample in real time and record the degradation process; S103: After the degradation is completed, clean the solid-phase residue after degradation; S104: Dry the solid-phase residue and continuously record the weight of the solid-phase residue; S105: After the drying is completed, observe and analyze the surface morphology of the solid-phase residue.

[0026] Preferably, when setting the degradation environment and placing the fiber, it includes the following steps: S201: Place the polyamide fiber sample on the adjustable-height degradation lifting platform 7; S202: Adjust the height of the degradation lifting platform 7 through the lifting track 9 to adjust the depth of the fiber sample immersed in seawater; S203: Start the seawater storage tank 1 to make the seawater circulate in the degradation tank 18; S204: According to the preset experimental conditions, add an appropriate amount of degradation aid to the seawater through the aid storage tank 2; S205: Start the first lighting system 17 and the aeration pipe 5, and adjust the light intensity and the aeration volume to simulate the marine environment.

[0027] Preferably, when performing real-time monitoring and recording of the degradation process, the following steps are included: S301: Use the pH, temperature, salinity, and dissolved oxygen content detection system 3 to record the state parameters of the seawater in real time; S302: According to the changes in the seawater state, the additive storage tank 2 and the aeration pipe 5 are automatically adjusted to ensure the stability of the experiment; S303: Start the first microscope probe 10 at regular intervals to observe and photograph the fiber samples in the seawater in real time, and record their morphological changes; S304: The carbon dioxide concentration detector 4 monitors and records the carbon dioxide content in the degradation tank 18 in real time to preliminarily judge the degradation degree.

[0028] Preferably, when cleaning the solid-phase residue after degradation, the following steps are included: S401: According to the set time interval, the degradation lifting platform 7 rises to the position of the first conveyor belt 8 to convey the fiber samples to the cleaning table 21; S402: The cleaning liquid spraying device 22 above the cleaning table 21 is connected to the cleaning liquid storage tank 20, and ultrapure water or organic reagents are used to clean the substances attached to the fiber surface by spraying; S403: The liquid after cleaning is filtered through a filter screen and collected in the cleaning liquid collection tank 19 for subsequent analysis of the degradation products.

[0029] Preferably, when drying and weighing the solid-phase residue, the following steps are included: S501: The cleaned fiber solid-phase residue is conveyed to the drying and weighing sensor 27 through the second conveyor belt 23; S502: Start the heating tube 26 for heating and drying, and the drying and weighing sensor 27 monitors the weight of the solid-phase residue in real time; S503: After the weight remains unchanged for a certain period of time, record the weight of the solid-phase residue to analyze the weight loss rate of the fiber.

[0030] Preferably, when observing and analyzing the surface morphology of the solid-phase residue, the following steps are included: S601: After drying is completed, start the second microscope probe 24 and the second lighting system 28 to photograph and record the dried solid-phase residue; S602: Transmit the shooting results to the central control system to form an image for observing the surface changes of the degraded fiber; S603: According to the image analysis results and combined with the weight detection data, comprehensively judge the degradation degree of the polyamide fiber.

[0031] Example 1 Degradation process: First, place the polyamide fiber sample on the degradation lifting platform 7, lower it to a certain depth through the lifting system, and then adjust the seawater degradation environment by controlling the seawater storage tank 1, the additive storage tank 2, the first lighting system 17, and the air diffuser pipe 5 through the system.

[0032] During the degradation process, the pH, temperature, salinity, and dissolved oxygen content detection system 3 will record the values every hour in real time, forming a relationship curve between the degradation time and the pH value, temperature, salinity, and dissolved oxygen content. The carbon dioxide concentration detector 4 will also record the carbon dioxide content in the degradation chamber 18 in real time, draw a time curve according to the concentration change. According to the set time, the first microscope probe 10 is started regularly to photograph and record the state of the fiber in the seawater, and the results are transmitted to the central control system to form images.

[0033] Cleaning process: According to the set time interval, the degradation lifting platform 7 rises to the position of the first conveyor belt 8, and the fiber sample is conveyed to the cleaning table 21. The cleaning liquid spraying device 22 above the cleaning table 21 is connected to the cleaning liquid storage tank 20. The cleaning liquid is ultrapure water or an organic reagent. The fiber is cleaned by spraying to wash off inorganic and organic substances such as salts attached to the fiber surface. The cleaned liquid is collected in the post-cleaning liquid collection tank 19 after being filtered through a filter screen, which is convenient for subsequent analysis of the degradation products.

[0034] Detection process: The solid-phase residue of the fiber after cleaning is conveyed to the drying weight sensor 27 through the second conveyor belt 23 and dried by heating with the heating tube 26. The drying weight sensor 27 is equipped with a weight sensor to monitor the weight of the solid-phase residue in real time. After the weight remains unchanged for 30 minutes, the weight of the solid-phase residue is recorded to analyze the weight loss rate of the fiber. After drying, the second microscope probe 24 and the second lighting system 28 are turned on to photograph and record the dried solid-phase residue, and the results are transmitted to the central control system to form images for observing the surface changes of the degraded fiber.

[0035] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A polyamide fiber degradation and detection device; characterized in that: The invention comprises a seawater storage tank (1), an auxiliary agent storage tank (2) is arranged on one side of the seawater storage tank (1), a blower (6) is arranged on one side of a degradation box (18), a second valve (12) is arranged on one side of the seawater storage tank (1), the degradation box (18) is arranged at the other end of the second valve (12), a first valve (11) is arranged on one side of the auxiliary agent storage tank (2), a sixth valve (16) is arranged on one side of the blower (6), a fifth valve (15) is arranged on the top surface of the blower (6), a third valve (13) is arranged on the top of the fifth valve (15), and a fourth valve (14) is arranged on one side of the third valve (13).

2. The polyamide fiber degradation and detection device according to claim 1, characterized in that: The top surface of the degradation box (18) is provided with a pH, temperature, salinity and dissolved oxygen content detection system (3); the inner side of the degradation box (18) is provided with a carbon dioxide concentration detector (4); the inner bottom surface of the degradation box (18) is provided with an aeration pipe (5); the other side of the degradation box (18) is provided with a lifting track (9); one side of the lifting track (9) is provided with a degradation lifting platform (7); one end of the degradation lifting platform (7) is provided with a first microscope probe (10); and the top surface of the degradation box (18) is provided with a first conveyor belt (8).

3. A polyamide fiber degradation and detection device according to claim 2, characterized in that: A cleaning liquid storage box (20) is arranged on one side of the first conveyor belt (8), a post-cleaning liquid collection box (19) is arranged above the cleaning liquid storage box (20), a cleaning table (21) is arranged at the bottom end of the first conveyor belt (8), a cleaning liquid spraying device (22) is arranged on the inner top surface of the cleaning liquid storage box (20), and a second conveyor belt (23) is arranged on the other side of the cleaning liquid storage box (20).

4. A polyamide fiber degradation and detection device according to claim 3, characterized in that: A drying box (31) is provided at the other end of the second conveyor belt (23), a circulating fan (29) is provided on the top surface of the drying box (31), an exhaust port (30) is provided on one side of the circulating fan (29), a heating pipe (26) is provided on one side of the interior of the drying box (31), a heat-insulating layer (25) is provided on one side of the drying box (31), a drying weight sensor (27) is provided on the bottom surface of the second conveyor belt (23), a second illumination system (28) is provided inside the drying box (31), and a second microscope probe (24) is provided below the second illumination system (28).

5. A polyamide fiber degradation and detection device according to claims 1-4, characterized in that: A polyamide fiber degradation and detection device, when used, comprises the following steps: S101: First, the degradation environment is set up and the polyamide fiber sample is placed; S102: real-time monitoring of the degradation process of the polyamide fiber sample and recording the degradation process; S103: After the degradation is completed, the solid phase residue after degradation is cleaned; S104: Dry the solid residue and continuously record the weight of the solid residue; S105: After drying, the surface morphology of the solid phase residue is observed and analyzed.

6. A polyamide fiber degradation and detection device according to claim 5, characterized in that: When setting up the degradation environment and placing the fibers, the following steps are included: S201: The polyamide fiber sample is placed on a degradation lifting table (7) with adjustable height; S202: adjusting the height of the degradation lifting platform (7) by the lifting track (9) to adjust the depth of the fiber sample immersed in seawater; S203: Start the seawater storage tank (1) so that the seawater circulates in the degradation tank (18); S204: According to the preset experimental conditions, adding an appropriate amount of degradation aid to the seawater through the additive storage tank (2); S205: Start the first lighting system (17) and the aeration pipe (5), and adjust the lighting intensity and aeration volume to simulate the marine environment.

7. The polyamide fiber degradation and detection device according to claim 5, characterized in that: When performing real-time monitoring and recording of the degradation process, the following steps are included: S301: Use pH, temperature, salinity and dissolved oxygen content detection system (3) to record the state parameters of seawater in real time; S302: According to the changes in the state of seawater, the additive storage tank (2) and the aeration pipe (5) are automatically adjusted to ensure the stability of the experiment; S303: Timing start the first microscope probe (10), the fiber sample in the seawater real-time observation and photography, record its morphological changes; S304: The carbon dioxide concentration detector (4) monitors and records the carbon dioxide content in the degradation box (18) in real time to preliminarily determine the degree of degradation.

8. The polyamide fiber degradation and detection device according to claim 5, characterized in that: When cleaning the solid phase residue after degradation, the following steps are included: S401: According to the set time interval, the degradation lift (7) rises to the first conveyor belt (8) position, the fiber sample is transferred to the cleaning station (21); S402: The cleaning liquid spraying device (22) above the cleaning station (21) is connected to the cleaning liquid storage tank (20), and the material attached to the fiber surface is cleaned by spraying ultrapure water or an organic reagent; S403: The cleaned liquid is filtered through a filter and collected in a cleaned liquid collection box (19) for subsequent analysis of degradation products.

9. The polyamide fiber degradation and detection device according to claim 5, characterized in that: When drying and weight testing the solid phase residue, the following steps are included: S501: The cleaned fiber solid residue is transmitted to the drying weight sensor (27) via a second conveyor belt (23); S502: Start the heating tube (26) for heating and drying, drying weight sensor (27) real-time monitoring of the weight of the solid residue; S503: After the weight remains unchanged for a certain period of time, the weight of the solid phase residue is recorded to analyze the weight loss rate of the fiber.

10. The polyamide fiber degradation and detection device according to claim 5, characterized in that: When observing and analyzing the surface morphology of solid phase residues, the following steps are included: S601: After drying, start the second microscope probe (24) and the second illumination system (28) to record the solid residue after drying; S602: The shooting results are transmitted to the central control system to form an image to observe the changes in the fiber surface after degradation; S603: Based on the image analysis results and combined with the weight detection data, comprehensively judge the degradation degree of the polyamide fiber.

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