A cleaning device for proton exchange membrane

Abstract

The utility model relates to the field of proton exchange membrane post -treatment technology, especially a kind of cleaning treatment device of proton exchange membrane. Realize the collaborative optimization of impurity efficient removal and membrane body structural integrity protection in the cleaning process of proton exchange membrane. Including: cleaning tank;Side is equipped with washing liquid import, and the flow direction of washing liquid in tank is contrary with the membrane moving direction;Reverse unwinding assembly, it is arranged in tank inside, for carrying and unwinding the membrane to be handled;Guide roller assembly, it is connected with the outlet of reverse unwinding assembly, and it is arranged in tank bottom in arc shape, for providing mobile guide for membrane;Vacuum tension roller, it is arranged in the end of guide roller assembly, for controlling the discharge tension of membrane;Ultrasonic assembly, it is arranged in the bottom of tank, and the layout path is consistent with the arc arrangement path of guide roller assembly, for ultrasonic cleaning to proton exchange membrane;Air knife assembly, it is arranged in cleaning tank, for removing membrane surface residual liquid, and the air outlet direction is contrary with the moving direction of proton exchange membrane.

Description

Technical Field

[0001] This utility model relates to the field of post-treatment technology of proton exchange membranes for fuel cells, electrolyzers for hydrogen production by water electrolysis, and flow batteries, and particularly to a cleaning device for proton exchange membranes. Background Technology

[0002] As a core component of fuel cells, water electrolysis hydrogen production electrolyzers, and flow batteries, the integrity and purity of the proton exchange membrane (PEM) directly determine the proton conduction efficiency, durability, and safety performance of the battery. In the production process of PEMs, post-treatment cleaning is a critical step. Processes such as acid washing, alkali washing, and water washing are needed to remove residual solvents, monomers, catalyst impurities, and other small molecules from the membrane. Simultaneously, it is essential to prevent defects such as scratches, wrinkles, swelling, and breakage caused by mechanical friction, chemical corrosion, or physical stress. This balance between "efficient purification" and "non-destructive treatment" has long been a technical challenge in the industry.

[0003] Currently, existing proton exchange membrane cleaning technologies and equipment have several shortcomings that make it difficult to meet the needs of precision production. Firstly, in terms of impurity removal efficiency, traditional cleaning devices mostly adopt static immersion or co-current rinsing modes. Small molecules inside the membrane migrate to the membrane surface only through natural diffusion, resulting in limited mass transfer driving force and incomplete impurity removal. Some residual substances will be slowly released during subsequent use, causing membrane performance degradation. Even if some equipment introduces ultrasonic-assisted cleaning, it only enhances local mass transfer through a single ultrasonic action without combining fluid flow direction optimization design, and cannot form a continuous and efficient impurity "stripping-removal" mechanism, thus the cleaning efficiency is still limited.

[0004] Secondly, regarding membrane protection and transport stability, existing equipment generally relies on direct contact conveying by rollers. The membrane rubs frequently against the roller surface in the cleaning tank, especially in humid and hot environments, which reduces the mechanical strength of the proton exchange membrane and makes it prone to surface scratches or edge tears. At the same time, membrane tension control is mostly a single fixed value and is not adjusted for the mechanical properties of the membrane after swelling during the cleaning stage. When the membrane undergoes dimensional changes due to the absorption of the washing liquid, wrinkles are easily generated due to tension mismatch, affecting the accuracy of subsequent processing.

[0005] Thirdly, regarding the controllability and adaptability of process parameters, most cleaning tanks do not integrate real-time monitoring and control systems. They can only manually sample and test the concentration and pH value of the cleaning solution periodically. This cannot compensate for the deviation of the cleaning solution parameters caused by consumption or dissolution of impurities during the cleaning process. This can easily lead to problems such as local over-cleaning causing chemical degradation of the membrane or insufficient cleaning leading to impurity residue. In addition, for proton exchange membranes of different thicknesses (especially ultrathin membranes below 50µm), existing equipment lacks suitable transport and support structures. Ultrathin membranes are prone to deformation due to their own gravity or fluid impact during the cleaning process, which further reduces the product yield.

[0006] Fourth, in the residual liquid removal process, traditional equipment often uses a single air knife or adsorption roller for surface liquid removal. The air knife parameters (air volume, air speed, and blowing angle) are fixed and cannot be dynamically adjusted according to the amount of residual liquid on the membrane surface. This can easily lead to local residual liquid not being completely removed, resulting in water stains during subsequent drying, or the membrane shaking or stretching deformation caused by excessive airflow impact, affecting the flatness of the membrane surface.

[0007] In summary, the existing proton exchange membrane cleaning and treatment devices have technical deficiencies in areas such as impurity removal efficiency, non-destructive membrane transport, process parameter control, and residual liquid treatment, which severely restrict the performance and production stability of proton exchange membrane products. There is an urgent need for a cleaning and treatment device that can achieve "ultrasonic enhanced mass transfer + countercurrent high-efficiency impurity removal + non-contact stable transport + precise parameter control" to break through the industry's technical bottlenecks and meet the precision manufacturing requirements of proton exchange membranes. Utility Model Content

[0008] The purpose of this invention is to provide a cleaning device for proton exchange membranes, which integrates functions such as countercurrent cleaning, ultrasonic enhancement, non-contact stable delivery, and precise parameter control to achieve synergistic optimization of efficient impurity removal and membrane structural integrity protection during the proton exchange membrane cleaning process.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a cleaning device for proton exchange membranes, comprising: The cleaning tank has a washing liquid inlet and a washing liquid outlet on its side, and the flow direction of the washing liquid in the cleaning tank is opposite to the movement direction of the proton exchange membrane. A reverse unwinding assembly is disposed inside the cleaning tank and is used to carry and unwind the proton exchange membrane to be processed; A guide roller assembly, the inlet of which is connected to the outlet of the reverse unwinding assembly, and arranged in an arc shape at the bottom of the cleaning tank, is used to provide movement guidance for the proton exchange membrane; A vacuum tension roller, which is disposed at the end of the guide roller assembly, is used to control the discharge tension of the proton exchange membrane; An ultrasonic component is disposed at the bottom of the cleaning tank, and the layout path of the ultrasonic component is consistent with the arc-shaped arrangement path of the guide roller assembly. The ultrasonic component is used to perform ultrasonic cleaning on the proton exchange membrane. An air knife assembly is disposed in the cleaning tank and is used to remove residual liquid from the membrane surface. The air outlet direction of the air knife assembly is opposite to the moving direction of the proton exchange membrane.

[0010] Furthermore, the roller spacing of the guide roller assembly is 10~50cm.

[0011] Furthermore, the diameter of the vacuum tension roller is 100~500mm, the wrap angle of the vacuum tension roller to the proton exchange membrane is 30~120°, and the absolute vacuum degree of the vacuum tension roller is 0~100kPa.

[0012] Furthermore, the ultrasonic component includes several ultrasonic transmitters, with a spacing of 5 to 50 cm between each ultrasonic transmitter, an ultrasonic frequency of 20 to 500 kHz, a power density of 10 to 20 W / L, and an ultrasonic operating temperature of 25 to 95°C.

[0013] Furthermore, the radius of curvature of the arc-shaped arrangement of the guide roller assembly and the ultrasonic assembly is 0.2~5m.

[0014] Furthermore, the air knife assembly includes a front air knife, a middle air knife, and a rear air knife, and each air knife has a mesh structure of 18 to 1000 meshes at its nozzle to ensure uniform air output. The air volume of the front air knife, the middle air knife, and the rear air knife is 0.1~10 L / min, the air velocity is 0.01~10 m / s, and the purging angle is 5~90°.

[0015] Furthermore, a concentration meter is installed in the cleaning tank to monitor the concentration of the washing solution in the cleaning tank; a pH meter is installed in the cleaning tank to monitor the pH value of the washing solution in the cleaning tank.

[0016] Furthermore, it also includes a tension roller, which is disposed above the cleaning tank and is used to work in conjunction with the vacuum tension roller to control the membrane tension in order to stretch and straighten the proton exchange membrane.

[0017] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model discloses a cleaning device for proton exchange membranes. Through the cooperation of a reverse unwinding assembly and an arc-shaped guide roller assembly, the proton exchange membrane is transported and turned in a suspended and stretched state in the cleaning tank. This avoids surface contact with traditional guide rollers, fundamentally eliminating mechanical damage such as scratches and indentations caused by friction, and significantly improving the integrity and yield of the finished membrane.

[0018] By combining ultrasonic technology with the principle of countercurrent cleaning, a highly efficient "vibration-sweeping" synergistic mechanism is formed. Ultrasonic waves can effectively "vibrate" small molecule impurities inside the membrane to the membrane-liquid interface, while the countercurrent flow of fresh cleaning solution can continuously maintain the maximum concentration gradient, quickly "sweeping away" the impurities. This achieves deep, uniform, and rapid purification of the membrane, solving the problems of low efficiency and high impurity residue in traditional soaking or cocurrent cleaning.

[0019] By using a multi-stage air knife assembly and blowing in the opposite direction to the membrane movement with precisely controlled parameters (airflow, air speed, angle), residual liquid film on the membrane surface can be removed efficiently and thoroughly. At the same time, it avoids membrane surface shaking or deformation that may be caused by excessive airflow impact, providing a flat and clean membrane surface foundation for subsequent drying processes.

[0020] By working in tandem with the vacuum tension roller, the membrane can be provided with appropriate tension control. This can not only adapt to the swelling state of the membrane in the liquid, but also compensate for the decrease in its modulus at high temperatures. It effectively suppresses defects such as wrinkles and stretching deformation during operation, and ensures the dimensional stability of the membrane.

[0021] The device integrates functions such as reverse unwinding, cleaning, tension control, and residual liquid removal. The components are arranged in an orderly manner around the cleaning tank, resulting in a compact overall structure that saves installation space. Compared with traditional decentralized equipment, it reduces operational complexity and maintenance costs, making it more suitable for industrial continuous production needs. Attached Figure Description

[0022] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram (a) of the planar structure of the proton exchange membrane cleaning device provided by this utility model. Figure 2 This is a schematic diagram (II) of the planar structure of the proton exchange membrane cleaning device provided by this utility model. Figure 3 This is a top view of the layout structure of the proton exchange membrane and ultrasonic components in the proton exchange membrane cleaning device provided by this utility model. Figure 4 This is a flowchart of the operation of the proton exchange membrane cleaning device provided by this utility model; The reference numerals in the attached figures are explained as follows: 1. Cleaning tank; 2. Reverse unwind assembly; 3. Guide roller assembly; 4. Vacuum tension roller; 5. Ultrasonic components; 6. Air knife assembly; 7. Tension roller; 8. COD monitoring probe; 9. Purification equipment; 90. Pure water treatment machine; 91. Reverse osmosis COD treatment machine; 10. Heat exchanger; 11. Proton exchange membrane; 12. Water spray assembly; 13. Track transmission; 14. Circulating pump; 15. Temperature probe; 16. Concentration probe. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] See Figures 1 to 4 The proton exchange membrane cleaning device in this example includes a cleaning tank 1, a reversing unwinding assembly 2, a guide roller assembly 3, a vacuum tension roller 4, an ultrasonic assembly 5, an air knife assembly 6, and a tension roller 7. All components are integrated into one unit, arranged around the cleaning tank, resulting in a compact overall structure that effectively saves installation space. Furthermore, through a sealed design and the selection of cleanroom-grade components, it can stably achieve a Class 1000 cleanliness level (≤352,000 airborne particles ≥0.5μm / m³, ≤2,930 suspended particles ≥5.0μm / m³), meeting the stringent environmental requirements of proton exchange membranes. Figure 1 The direction of the arc-shaped arrow in the figure indicates the direction of travel of the proton exchange membrane 11.

[0025] Specifically, a washing liquid inlet is provided on one side of the cleaning tank 1, and a washing liquid outlet is provided on the opposite side, with the washing liquid flowing in the following direction: Figure 1 As shown in the diagram, the distance between the washing solution inlet and outlet is set at 5-15m, and the width of the washing tank is controlled at 500-1700mm. Fresh washing solution is injected into the washing tank 1 through the washing solution inlet, while the waste solution is discharged through the washing solution outlet, forming a continuous countercurrent washing process. Countercurrent means that the flow direction of the washing solution is opposite to the movement direction of the proton exchange membrane 11. This ensures that the membrane is always in contact with the washing solution with the highest freshness and lowest impurity concentration throughout the entire washing process, continuously maintaining the maximum concentration gradient at the membrane-liquid interface, and significantly improving the migration efficiency of impurities from the membrane to the washing solution. Compared with traditional cocurrent washing, the impurity removal rate can be effectively improved.

[0026] In this example, the inner wall of the cleaning tank 1 is made of corrosion-resistant materials such as PP, PE, PTFE, or glass. This design ensures that the cleaning tank 1 can withstand the chemical corrosion and swelling of acidic, alkaline, and high-temperature (25~95℃) cleaning solutions for a long time, effectively avoiding metal ion contamination and performance degradation of the tank due to corrosion, thus providing a reliable container environment guarantee for the clean treatment of the proton exchange membrane 11.

[0027] Both the inlet and outlet of the washing solution are equipped with COD monitoring probes 8 to monitor the chemical oxygen demand (COD) value of the washing solution in the cleaning tank 1, thereby accurately determining the cleanliness and impurity load of the washing solution. The maximum COD concentration at the washing solution inlet is 50 ppm, and the maximum COD concentration at the washing solution outlet is 5000 ppm.

[0028] A purification device 9 is also connected to the washing solution outlet, including a pure water treatment unit 90 and a reverse osmosis COD treatment unit 91. The pure water treatment unit 90 is used to remove inorganic impurities such as metal ions from the washing solution, while the reverse osmosis COD treatment unit 91 is used to efficiently degrade and remove COD pollutants from the washing solution. This purification device performs real-time purification of the discharged liquid, and combined with the pipeline design, the treated clean washing solution can be returned to the cleaning tank 1 for reuse via the washing solution inlet, thus constructing a washing solution circulation system. This system not only significantly reduces the consumption of fresh washing solution and wastewater discharge, lowering operating costs, but also ensures consistent treatment results throughout the entire cleaning process by maintaining the washing solution at a low and stable COD level.

[0029] It is worth noting that both the pure water treatment machine 90 and the reverse osmosis COD treatment machine 91 have high temperature resistance characteristics and can stably withstand the high temperature washing liquid environment of 95℃. There is no need to pre-treat the discharged high temperature waste liquid, which simplifies the purification process and avoids the problem of impurity precipitation or purification efficiency reduction caused by temperature fluctuations.

[0030] In addition, in this example, a temperature probe 15 and a concentration probe 16 are respectively installed at the inlet and outlet of the washing solution, and at positions below the surface of the washing solution. The temperature probe 15 is used to monitor the temperature of the washing solution entering and exiting the cleaning tank 1 in real time, ensuring that the temperature inside the cleaning tank 1 remains stable within the process window of 25~95℃; the concentration probe 16 is used to detect changes in the concentration of the washing solution online, promptly detecting concentration decreases or composition deviations caused by the dissolution of impurities.

[0031] By placing these two probes at the inlet and outlet positions, full-process monitoring of the washing solution's temperature and concentration can be achieved: the inlet data reflects the initial state of the fresh washing solution, while the outlet data reflects the actual condition of the washing solution after use. Based on the difference between the two detection results, the system can accurately determine the cleaning efficiency and the degree of washing solution aging, triggering a replenishment or replacement procedure. This ensures effective cleaning while maximizing the lifespan of the washing solution and reducing production costs.

[0032] The reverse unwinding assembly 2, located inside the cleaning tank 1, is used to carry the proton exchange membrane 11 to be processed and unwind it in the reverse direction. Its "reverse unwinding" mechanism specifically involves: by reversing the rotation of the unwinding roller (opposite to the conventional unwinding direction), the proton exchange membrane 11, originally with the "product side facing up," is adjusted to have the "product side facing down" position. Figure 1 (A side shown) facing down, protective layer ( Figure 1 The sample enters the cleaning tank 1 with side B facing upwards.

[0033] The protective layer is made of acid and alkali resistant, low-absorption polymer film (such as PET release film), which is pre-attached to one side of the proton exchange membrane 11 before unwinding. After reversal, the protective layer (side B) directly contacts the subsequent guide roller assembly 3, while the product side of the proton exchange membrane 11 (i.e., the key surface involved in the reaction—side A) faces the ultrasonic component 5 and the washing solution at the bottom of the washing tank 1. This avoids direct friction between the product side and mechanical parts, and ensures that it can fully contact the washing solution and ultrasonic energy, thus preventing problems such as membrane scratches and stain adhesion during unwinding. At the same time, this reversal design also extends the path length of the membrane in the tank, ensuring that the contact time between the membrane and the washing solution reaches the process requirement of 1~30 minutes, providing a guarantee for the full dissolution of impurities.

[0034] The aforementioned guide roller assembly 3, whose inlet is connected to the outlet end of the reversing unwinding assembly 2, consists of several guide rollers arranged in an arc shape at the bottom of the cleaning tank 1. The core design feature of this guide roller assembly 3 is "arc-shaped non-contact conveying." A conveyor belt 13 may or may not be installed on the guide roller assembly 3. When the guide roller assembly 3 is equipped with a conveyor belt 13, surface B is the conveyor belt surface that adheres to the protective layer.

[0035] Specifically, the spacing between the guide rollers is strictly controlled at 10~50cm, which ensures that the proton exchange membrane 11 can still move smoothly along the arc path without additional support, avoiding membrane sagging and wrinkling due to excessive roller spacing, or membrane stretching and deformation due to excessively small radius of curvature.

[0036] Since the proton exchange membrane 11 is reversed so that the protective layer faces upwards, the guide roller assembly 3 only contacts the protective layer, while the product surface of the proton exchange membrane 11 is completely suspended in the washing solution, achieving "zero-contact" conveying. Compared with traditional direct-contact guide rollers, this completely eliminates membrane surface scratches caused by wear and dirt on the guide roller surface, effectively improving product yield.

[0037] In addition, for the above-mentioned guide roller assembly 3, the angle of the entire guide roller assembly 3 in the cleaning tank 1 is 30~60°. Combined with the straight distance between the two guide rollers controlled at 5~15m, it can be calculated that the radius (i.e. the radius of curvature of the membrane path) of the entire guide roller assembly 3 is controlled at 5~29m. This ensures that the proton exchange membrane 11 is smoothly transported on the guide rollers, avoids damage caused by excessive bending (too small radius), and can adapt to the overall size layout of the cleaning tank 1.

[0038] The vacuum tension roller 4, located at the end of the guide roller assembly 3, is a key component for controlling the stability of the proton exchange membrane 11 discharge. Its structure is a hollow roller body with uniformly distributed micro-adsorption pores on the surface. An internal vacuum system is connected, allowing for stable adsorption and tension control of the membrane by adjusting the vacuum level.

[0039] In this example, the diameter of the vacuum tension roller 4 is 100~500mm, the absolute vacuum degree is 0~100kPa, and the wrap angle (i.e., the contact angle between the membrane and the roller surface) of the vacuum tension roller 4 to the proton exchange membrane 11 is 30~120°. The size of the wrap angle can be flexibly adjusted by adjusting the installation height of the roller to ensure that sufficient adsorption force can be provided for different membrane thicknesses (especially ultrathin films below 50μm).

[0040] The vacuum tension roller 4 can adjust the film's running speed and tension in real time to adapt to the mechanical properties of the film after swelling during the cleaning stage. When the film deviates or experiences tension fluctuations, the vacuum system can quickly adjust the adsorption force and, in conjunction with speed compensation, ensure stable film discharge, avoiding film tearing or wrinkling caused by sudden tension changes.

[0041] The ultrasonic component 5 is set at the bottom of the cleaning tank 1, and the layout path of the ultrasonic component 5 is consistent with the arc-shaped arrangement path of the guide roller component 3. That is, the curvature radius of the ultrasonic component 5 is consistent with that of the guide roller component 3, both being 0.2~5m. This forms a precise alignment of the three components: membrane, guide roller, and ultrasonic wave, ensuring that the ultrasonic energy is evenly applied to the entire membrane to remove small molecules from the proton exchange membrane 11.

[0042] The ultrasonic component 5 in this example includes several ultrasonic transmitters, with the spacing between each transmitter controlled between 5 and 50 cm. The number of ultrasonic transmitters can be flexibly adjusted according to the membrane width (the width of the proton exchange membrane 11 in this example is 300-1500 mm). The ultrasonic frequency is 20-500 kHz, with the low-frequency band suitable for removing deep impurities and the high-frequency band suitable for removing surface micro-impurities. The power density is kept stable at 10-20 W / L to avoid damage to the membrane structure due to excessive power.

[0043] In addition, the ultrasonic component 5 in this example can withstand washing solution temperatures of 25~95℃ and acid and alkaline environments, ensuring long-term stable operation. At the same time, the ultrasonic component 5 supports switching between two working modes: "continuous wave" and "pulse wave". Depending on the type of washing solution (such as water washing or acid washing) and the membrane material, a better ultrasonic working mode can be selected to further improve the efficiency of impurity removal.

[0044] The air knife assembly 6 is installed in the cleaning tank 1 to remove residual liquid from the membrane surface, providing pretreatment for the subsequent drying process. It adopts a three-section combination design, that is, the front air knife, the middle air knife and the rear air knife are arranged sequentially along the direction of membrane movement to form a "gradient purging effect".

[0045] Specifically, the cross-sectional dimensions of the air outlet of each air knife have been enlarged to ensure a low airflow velocity but sufficient air volume, forming a gentle and wide-coverage slow airflow. This effectively avoids damage to the fragile proton exchange membrane 11 due to excessive airflow impact. Simultaneously, each air outlet is equipped with a stainless steel filter screen of 18 to 1000 mesh (the mesh size can be selected and adjusted according to the actual flatness of the membrane surface). This filter screen allows the compressed air to be evenly diffused before purging, forming a stable and consistent airflow. This further prevents membrane surface vibration or localized liquid residue that may be caused by uneven airflow distribution, ensuring the uniformity and reliability of the purging effect.

[0046] In addition, the airflow (0.1~10L / min), air velocity (0.01~10m / s), and purging angle (5~90°) of each air knife can be independently adjusted: the front air knife can be set to "large angle + low air velocity", mainly to initially remove a large amount of residual washing liquid from the membrane surface; the middle air knife can be set to "medium angle + medium air velocity" to further remove residual washing liquid from the membrane surface gaps; and the rear air knife can be set to "small angle + high air velocity" to achieve rapid drying of the membrane surface. At the same time, the air outlet direction of the air knife is opposite to the direction of membrane movement, forming "reverse purging", which can prolong the contact time between the airflow and the membrane surface, improve the residual liquid removal rate, and avoid the problem of residual liquid "accumulation" caused by traditional forward purging.

[0047] In this example, a water spray assembly 12 is also provided upstream of the air knife assembly 6 (i.e., in the direction of membrane travel, before the air knife assembly 6) to clean the washing solution on the proton exchange membrane 11. The washing solution (which may include chemical cleaning agents, contaminants, etc.) remaining on the surface of the proton exchange membrane 11 is rinsed off with pure water to avoid chemical washing solution remaining on the membrane surface and to ensure that the surface is in a relatively clean water state before the next step of drying.

[0048] Tension roller 7 is positioned above the cleaning tank 1 and works in conjunction with the aforementioned vacuum tension roller 4 to control membrane tension, thereby controlling the tension of the proton exchange membrane 11 exiting the cleaning tank 1. Based on the mechanical properties of the membrane at different stages (e.g., tension needs to be reduced after membrane swelling during the cleaning stage and increased during the discharge stage), the tension is dynamically adjusted to form a "low-medium-high" gradient tension curve, ensuring the membrane remains flat throughout the entire processing and further reducing the risk of membrane damage.

[0049] In this example, a concentration meter and a pH meter are also installed in cleaning tank 1 to monitor the concentration and pH value of the washing solution. When the concentration of the washing solution is detected to be lower than the preset process value (e.g., insufficient concentration of acid washing solution) or the pH value deviates from the target range (e.g., pH decrease of alkaline washing solution), it is necessary to connect to the external replenishment system to replenish acid or alkali in a timely manner. If it is pure water cleaning, the system is connected to a pure water purification unit to replenish fresh pure water. If it is acid-alkali cleaning, acid or alkali solution is added precisely to ensure that the parameters of the washing solution in the tank are always stable within the process window, avoiding incomplete cleaning or excessive corrosion of the membrane due to washing solution failure.

[0050] A heat exchanger 10 is installed outside the cleaning tank 1. The heat exchanger 10 is used to heat and precisely control the temperature of the cleaning solution in the tank, ensuring that the temperature of the cleaning solution is stable within an adjustable range of 25~95℃. A suitable heating temperature helps to enhance the activity of the cleaning solution, improve the solubility of impurities, and can synergize with the ultrasonic cavitation effect, further improving the impurity removal efficiency. After being discharged from the cleaning tank 1, the used waste cleaning solution first enters the purification device 9 to remove contaminants and impurities, restoring its cleanliness. Subsequently, the circulating pump 14 provides power to push the cleaning solution through the heat exchanger 10 for precise temperature adjustment, restoring it to the most suitable / required cleaning temperature. Finally, the purified and temperature-controlled cleaning solution is returned to the inlet of the cleaning tank 1 for recycling.

[0051] All rollers used in this example are made of acid and alkali resistant materials. This material selection ensures that the rollers can maintain structural integrity and stable surface performance even under long-term contact with acidic or alkaline cleaning solutions and humid and hot environments. It effectively avoids surface damage, contaminant precipitation or performance degradation caused by corrosion, thereby ensuring that the proton exchange membrane 11 is always in contact with a high-cleanliness, uncontaminated roller surface throughout the entire process, meeting the strict requirements of non-destructive post-processing.

[0052] The specific workflow is as follows: Unwinding and reversing: The proton exchange membrane 11 to be processed (with the protective layer attached) is fed into the tension roller 7 by the external unwinding system. After tension adjustment, it enters the reversing unwinding assembly 2 and is adjusted to the state of "product face down and protective layer face up" by the reversing mechanism. Then it enters the cleaning tank 1. Countercurrent ultrasonic heating cleaning: The membrane moves along the arc path of the guide roller assembly 3, and the washing liquid in the cleaning tank 1 flows in the opposite direction to the membrane. At the same time, the ultrasonic component 5 is activated, and impurities inside the membrane are stripped off through the ultrasonic cavitation effect. The impurities are discharged from the outlet with the washing liquid. Tension control and discharge: After cleaning, the membrane body is discharged smoothly by adjusting the tension and speed of the vacuum tension roller 4. Residual liquid removal: After discharge, the membrane body is swept by the three-stage reverse blowing of the air knife assembly 6 to remove residual washing liquid from the surface; Subsequent processes: The membrane after residual liquid removal can directly enter the subsequent drying process, realizing continuous production.

[0053] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A cleaning and treatment device for a proton exchange membrane, characterized in that, include The cleaning tank (1) has a washing liquid inlet and a washing liquid outlet on its side. The washing liquid in the cleaning tank (1) flows in the opposite direction to the movement direction of the proton exchange membrane. Reverse unwinding assembly (2), the reverse unwinding assembly (2) is disposed inside the cleaning tank (1) and is used to carry and unwind the proton exchange membrane to be processed; The guide roller assembly (3) has its inlet connected to the outlet of the reverse unwinding assembly (2) and is arranged in an arc shape at the bottom of the cleaning tank (1) to provide movement guidance for the proton exchange membrane. Vacuum tension roller (4), which is disposed at the end of the guide roller assembly (3), is used to control the discharge tension of the proton exchange membrane; An ultrasonic component (5) is disposed at the bottom of the cleaning tank (1), and the arrangement path of the ultrasonic component (5) is consistent with the arc arrangement path of the guide roller assembly (3). The ultrasonic component (5) is used to perform ultrasonic cleaning on the proton exchange membrane. Air knife assembly (6) is disposed in the cleaning tank (1). The air knife assembly (6) is used to remove residual liquid on the membrane surface. The air outlet direction of the air knife assembly (6) is opposite to the moving direction of the proton exchange membrane.

2. The proton exchange membrane cleaning device according to claim 1, characterized in that, The roller spacing of the guide roller assembly (3) is 10~50cm.

3. The proton exchange membrane cleaning device according to claim 1, characterized in that, The diameter of the vacuum tension roller (4) is 100~500mm, the wrap angle of the vacuum tension roller (4) to the proton exchange membrane is 30~120°, and the absolute vacuum degree of the vacuum tension roller (4) is 0~100kpa.

4. The proton exchange membrane cleaning device according to claim 1, characterized in that, The ultrasonic component (5) includes several ultrasonic transmitters, with a spacing of 5~50cm between each ultrasonic transmitter, an ultrasonic frequency of 20~500kHz, a power density of 10~20W / L, and an ultrasonic operating temperature of 25~95℃.

5. The proton exchange membrane cleaning device according to claim 1, characterized in that, The radius of curvature of the arc-shaped arrangement of the guide roller assembly (3) and the ultrasonic assembly (5) is 0.2~5m.

6. The proton exchange membrane cleaning device according to claim 1, characterized in that, The air knife assembly (6) includes a front air knife, a middle air knife and a rear air knife. Each air knife has a mesh structure of 18 to 1000 meshes at its nozzle to ensure uniform air output. The air volume of the front air knife, the middle air knife, and the rear air knife is 0.1~10 L / min, the air velocity is 0.01~10 m / s, and the purging angle is 5~90°.

7. The proton exchange membrane cleaning device according to claim 1, characterized in that, The cleaning tank (1) is also equipped with a concentration meter for monitoring the concentration of the washing solution in the cleaning tank (1); the cleaning tank (1) is also equipped with a pH meter for monitoring the pH value of the washing solution in the cleaning tank (1).

8. The proton exchange membrane cleaning device according to claim 1, characterized in that, It also includes a tension roller (7), which is positioned above the cleaning tank (1) and is used to work in conjunction with the vacuum tension roller (4) to control the membrane tension so as to stretch and straighten the proton exchange membrane.

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