A fuel cell slurry grinding bead cleaning system

Abstract

The present invention relates to a fuel cell slurry grinding bead cleaning system, comprising a cleaning and drying module, a screening module, and a control unit. A conveying pipe is provided between the cleaning and drying module and the screening module, and the grinding beads enter the screening module from the cleaning and drying module through the conveying pipe for screening. The system is characterized in that the cleaning and drying module comprises a cleaning guide barrel and a cleaning barrel that can be raised and lowered in the cleaning guide barrel, and the screening module comprises a movable screening box. The control unit detects and determines that the screening box is correctly placed, controls the cleaning barrel to be at the lowest position of the cleaning guide barrel, and then controls the grinding beads to be cleaned to enter the cleaning and drying module through a feed port.

Description

Technical Field

[0001] The invention relates to the field of fuel cell membrane electrode slurry ratio manufacturing, and in particular to a system for cleaning, drying and screening fuel cell slurry grinding beads. Background Art

[0002] During the membrane electrode slurry mixing process, grinding beads are added to ensure uniform mixing of the various raw materials, ensuring consistent and uniform product coating. During mixing, the grinding beads may adhere to the slurry. To ensure accurate and consistent mixing, the beads must be cleaned. Due to the high cost of slurry, some precious metals can be recovered from the initial cleaning wastewater. Furthermore, bead size consistency can affect mixing performance, so they must be carefully screened to maintain a diameter tolerance within ±0.3mm. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide a fuel cell slurry grinding bead cleaning system that can not only thoroughly clean and dry the grinding beads but also ensure good size consistency of the grinding beads.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a fuel cell slurry grinding bead cleaning system, comprising a cleaning and drying module, a screening module, and a control unit. A conveying pipe is provided between the cleaning and drying module and the screening module, and the grinding beads enter the screening module from the cleaning and drying module through the conveying pipe for screening. The system is characterized in that the cleaning and drying module includes a cleaning guide barrel and a cleaning barrel that can be raised and lowered within the cleaning guide barrel. The screening module includes a movable screening box. The control unit detects and determines that the screening box is correctly placed, controls the cleaning barrel to be at the lowest position of the cleaning guide barrel, and then controls the grinding beads to be cleaned to enter the cleaning and drying module through the feed port. By arranging the cleaning barrel and the cleaning guide barrel to be able to rise and fall, the grinding beads can fully move during the lifting process, thereby effectively contacting the cleaning solution and improving the cleaning degree of the grinding beads. The screening module is then provided to ensure that the size consistency of the grinding beads at the screening site is good.

[0005] Preferably, the cleaning and drying module includes a cleaning assembly and a drying assembly, wherein the cleaning assembly includes a grinding bead input conduit and a grinding bead output conduit. When the grinding beads flow out of the cleaning assembly through the grinding bead output conduit, the cleaning bucket is at the highest position of the cleaning guide bucket. When the grinding beads enter the cleaning assembly through the grinding bead input conduit, the cleaning bucket is at the lowest position of the cleaning guide bucket. The provision of the delivery conduit allows the grinding beads to flow between the various levels, and the defined position of the cleaning bucket ensures that all grinding beads requiring cleaning can enter and all cleaned grinding beads can be discharged.

[0006] Preferably, the grinding bead input conduit includes a grinding bead inlet located at the highest point of the grinding bead input conduit, and the grinding bead output conduit includes a grinding bead outlet located at the lowest point of the grinding bead output conduit. This ensures that the grinding beads can be transferred step by step and in a directional manner to prevent backflow of the grinding beads.

[0007] Preferably, the cleaning assembly includes a cleaning water tank, wherein the cleaning guide barrel and the cleaning barrel are located within the water tank. The cleaning guide barrel is grid-shaped, the bottom of the cleaning barrel is provided with grid holes, and the sidewalls of the water tank are provided with ultrasonic generators. The water tank carries cleaning water, and the ultrasonic generators on the sidewalls of the water tank are used to effectively clean slurry residue from the surface of the grinding beads.

[0008] Preferably, the water tank is provided with a cleaning water inlet and a cleaning wastewater outlet, and the control unit controls the electromagnetic switch so that the cleaning water enters the water tank from the cleaning water inlet and the cleaning wastewater is discharged from the water tank from the cleaning wastewater outlet.

[0009] Preferably, a recovery barrel is included for recovering precious metal materials in the cleaning water. The cleaning assembly includes several stages of cleaning assemblies, and at least the cleaning wastewater discharged by the first stage of cleaning assemblies is output to the recovery barrel. Precious metal materials in the cleaning wastewater can be recovered in batches.

[0010] Preferably, the drying component includes a drying fan, and the airflow generated by the drying fan enters the water tank of the drying component through a drying air duct, and a heating device is provided in the drying air duct to increase heat on the basis of air drying to improve the degree of drying.

[0011] Preferably, the cleaning assembly comprises several stages. When the final stage of the cleaning assembly transfers the grinding beads to the drying assembly, the control unit prompts the reheating of the beads. Each module operates independently without interfering with each other, and the cleaning and drying times are designed to achieve a balanced schedule for each station, improving efficiency.

[0012] Preferably, the screening box is provided with a first and second screening mesh layers. The first screening mesh layer is positioned above the second screening mesh layer. The mesh size of the first screening mesh layer is not smaller than that of the second screening mesh layer, and the difference between the mesh sizes of the first and second screening mesh layers is less than or equal to 0.6 mm. The grinding beads remaining between the first and second screening mesh layers are qualified and are used for the next slurry mixing. This allows the size deviation of qualified grinding beads to be controlled within ±0.3 mm. It is understood that the mesh size of the first screening mesh layer, i.e., its diameter, is set to a positive tolerance of 0.3 mm (for a grinding bead diameter of 5 mm, the mesh size is 5.3 mm in diameter), while the mesh size of the second screening mesh layer is set to a negative tolerance of 0.3 mm (i.e., the mesh size is 4.7 mm in diameter).

[0013] Preferably, when the grinding beads enter the screening module, the control unit controls the reminder device to issue an instruction to replace the screening box.

[0014] Compared with the prior art, the advantages of the present invention are: by arranging the cleaning barrel and the cleaning guide barrel to be able to move up and down, the grinding beads can fully move during the lifting process, so that they can effectively contact the cleaning water, thereby improving the cleaning degree of the grinding beads, and then by setting a screening module, it is ensured that the size consistency of the screened grinding beads is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structural assembly of a fuel cell slurry grinding bead cleaning system according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic cross-sectional view of the structure of a cleaning component of a fuel cell slurry grinding bead cleaning system according to an embodiment of the present invention;

[0017] Figure 3 Another cross-sectional schematic diagram of the cleaning assembly structure of the fuel cell slurry grinding bead cleaning system according to an embodiment of the present invention;

[0018] Figure 4 Schematic diagram of a screening module of a fuel cell slurry grinding bead cleaning system according to an embodiment of the present invention;

[0019] Figure 5 Schematic cross-sectional view of a screening module of a fuel cell slurry grinding bead cleaning system according to an embodiment of the present invention.

[0020] Reference numerals: 11, primary cleaning component, 12, feed port, 13, secondary cleaning component, 14, recovery bucket, 15, tertiary cleaning component, 16, cleaning wastewater outlet, 17, heating device, 18, drying fan, 19, drying component, 110, discharge port, 111, screening component, 112, equipment frame, 113, automatic lifting module, 114, cleaning water inlet;

[0021] 21. Lifting connection floating joint, 22. Grinding bead cleaning bucket, 23. Grid cleaning guide bucket, 24. Water tank, 25. Ultrasonic generator, 26. Solenoid valve, 27. Grinding bead inlet, 28. Grinding bead outlet, 31. Screening bucket, 32. First layer screening mesh, 33. Second layer screening mesh, 34. Mobile screening box, 35. Grinding bead inlet. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0024] See also Figures 1 to 5 , which is the best embodiment of the invention.

[0025] In this embodiment, a fuel cell slurry grinding bead cleaning system includes a cleaning and drying module, a screening module, and a control unit. A delivery pipe is provided between the cleaning and drying module and the screening module, through which the grinding beads are transported from the cleaning and drying module to the screening module for screening. The cleaning and drying module includes a cleaning guide barrel and a cleaning bucket that can be raised and lowered within the cleaning guide barrel. The screening module includes a movable screening box. The control unit detects and confirms the correct placement of the screening box, controls the cleaning bucket to the lowest position within the cleaning guide barrel, and then controls the grinding beads to be cleaned to enter the cleaning and drying module through a feed port. By arranging the cleaning bucket and the cleaning guide barrel to be raised and lowered, the grinding beads can move fully during the raising and lowering process, effectively contacting the cleaning solution and improving the cleaning efficiency of the grinding beads. Furthermore, the screening module ensures that the screened grinding beads have a consistent size.

[0026] Specifically, in this embodiment, the cleaning and drying module includes a cleaning component and a drying component 19. The cleaning component includes a first-stage cleaning component 11, a second-stage cleaning component 13, and a third-stage cleaning component 15. A feed port 12 is provided at the first-stage cleaning component 11, and the grinding beads to be cleaned enter from the feed port 12. The cleaning component needs to be provided with a cleaning water inlet 114. After the three-stage cleaning, the grinding beads enter the drying component 19. The cleaning components can be increased or decreased according to actual needs. The modular design automatically transfers the grinding beads between each module through a conveying pipe. However, in order to ensure the orderly operation of the entire system, the relevant execution actions must be performed according to the set program.

[0027] Specifically, in this embodiment, the cleaning assembly includes a grinding bead input conduit and a grinding bead output conduit. When the grinding beads exit the cleaning assembly through the grinding bead output conduit, the cleaning bucket is at the highest position within the cleaning guide bucket. When the grinding beads enter the cleaning assembly through the grinding bead input conduit, the cleaning bucket is at the lowest position within the cleaning guide bucket. The provision of the delivery conduit allows the grinding beads to flow between the various levels, and the defined positions of the cleaning buckets ensure that all grinding beads requiring cleaning can enter and all cleaned grinding beads can be discharged.

[0028] The grinding bead input channel includes a grinding bead inlet 27, which is located at the highest point of the grinding bead input channel, and the grinding bead output channel includes a grinding bead outlet 28, which is located at the lowest point of the grinding bead output channel. This ensures that the grinding beads can be transferred step by step and in a directional manner to prevent backflow of the grinding beads.

[0029] Furthermore, in this embodiment, the cleaning assembly includes a cleaning water tank 24, wherein the cleaning guide barrel 23 and the cleaning barrel 22 are located within the water tank 24. The cleaning guide barrel 23 is grid-shaped, and the bottom of the cleaning barrel 22 is provided with grid holes. An ultrasonic generator 25 is provided on the side wall of the water tank 24. The water tank carries the cleaning water, and the ultrasonic generator on the side wall of the water tank can effectively clean the slurry residue on the surface of the grinding beads.

[0030] Specifically, the water tank is provided with a wash water inlet 114 and a wash wastewater outlet 16. The control unit controls the electromagnetic switch to allow wash water to enter the water tank from the wash water inlet and to allow wash wastewater to exit the water tank from the wash wastewater outlet. In this embodiment, the electromagnetic switch is a solenoid valve 26 for controlling the discharge of wash wastewater. Of course, a solenoid valve can also be used to control the entry of wash water.

[0031] Furthermore, a recovery bucket 14 is included for recovering precious metal materials from the wash water. At least the wash wastewater discharged from the first-stage wash assembly is output to the recovery bucket. Precious metal materials in the wash wastewater can be recovered in batches. Of course, it is also possible to recover the wash wastewater from multiple or all stages of the wash assembly. In this embodiment, only the wash wastewater from the first-stage wash assembly is recovered, while the wash wastewater from the remaining stages is discharged through the wash drain outlet, i.e., the wastewater is centrally treated.

[0032] In this embodiment, the drying assembly includes a drying fan 18. The airflow generated by this fan 18 flows through a drying air duct and enters the drying assembly's water tank. A heating device 17 is located within the drying duct. This adds heat to the air-drying process, enhancing the drying process. The water tank is merely a reference to the fact that the basic structure of the drying assembly can be identical to that of the washing assembly. The water tank is used to recover dripping water from the drying process and does not necessarily contain washing water.

[0033] Drying is done with a fan. To speed up drying, a heating module is added to the pipeline. A belt heating module is used to heat the pipeline. In addition, insulation cotton is applied to the outside of the pipeline and the outside of the drying box to prevent burns.

[0034] Specifically, in this embodiment, the screening box includes a screening barrel 31, which is equipped with a first layer of screening mesh 32 and a second layer of screening mesh 33. The grinding beads remaining between the first and second layers are qualified and are used for the next slurry mixing. This allows the size deviation of qualified grinding beads to be controlled within ±0.3mm. It is understood that the mesh size, i.e., its diameter, of the first layer of screening mesh is set to a positive tolerance of 0.3mm (for a grinding bead diameter of 5mm, the mesh size is 5.3mm in diameter), while the mesh size of the second layer of screening mesh is set to a negative tolerance of 0.3mm (i.e., a mesh size of 4.7mm in diameter). The screening box is also equipped with a grinding bead inlet 35 for receiving the grinding beads output by the drying assembly. When the grinding beads enter the screening module, the control unit controls the reminder device to issue an instruction to replace the screening box.

[0035] The specific working process is as follows: manually take out the screening box, replace it with a new one and put it into the screening bucket, press the button to confirm and send a signal to the system; the drying module works, the lifting module rises and lifts the grinding bead cleaning bucket to the set height, and the grinding beads will automatically flow into the screening box through the pipe; after the flow action is completed, the lifting module moves to the set material receiving position and transmits a signal to the system. The three-level cleaning module works, the lifting module rises and lifts the grinding bead cleaning bucket to the set height, and the grinding beads will automatically flow into the cleaning bucket of the drying module through the pipe. After the flow action is completed, the lifting module moves to the set material receiving position and feeds back a signal to the system; the same action principle is used for the secondary cleaning and primary cleaning actions. Finally, after the primary cleaning completes the grinding bead flow, the system receives the feedback signal and prompts the manual to add the grinding beads that need to be cleaned; the entire cleaning, drying and screening process is repeated.

[0036] Thoroughly cleaning, drying, and screening the grinding beads ensures consistent bead size during slurry mixing, ensuring accurate and consistent slurry proportions each time. A uniform slurry mix facilitates consistent and uniform coating. Any slurry that adheres to the grinding beads during mixing can be cleaned to recover some precious metals.

[0037] By setting the cleaning barrel and the cleaning guide barrel to be able to move up and down, the grinding beads can move fully during the lifting process, so that they can effectively contact the cleaning water and improve the cleaning degree of the grinding beads. Then, by setting up a screening module, it is ensured that the size consistency of the screened grinding beads is good.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fuel cell slurry grinding bead cleaning system, comprising a cleaning and drying module, a screening module, and a control unit, wherein a delivery pipe is provided between the cleaning and drying module and the screening module, and the grinding beads pass through the delivery pipe from the cleaning and drying module to the screening module for screening, characterized in that: The cleaning and drying module includes a cleaning guide barrel and a cleaning barrel that can be lifted and lowered in the cleaning guide barrel. The screening module includes a movable screening box. The control unit detects and determines that the screening box is correctly placed, controls the cleaning barrel to be at the lowest position of the cleaning guide barrel, and then controls the grinding beads to be cleaned to enter the cleaning and drying module through the feed port. The cleaning and drying module includes a cleaning component and a drying component. The cleaning component includes a grinding bead input pipe and a grinding bead output pipe. When the grinding beads flow out of the cleaning component through the grinding bead output pipe, the cleaning barrel is at the highest position of the cleaning guide barrel. When the grinding beads enter the cleaning component through the grinding bead input pipe, the cleaning barrel is at the lowest position of the cleaning guide barrel. The grinding bead input pipe includes a grinding bead inlet, which is at the highest point of the grinding bead input pipe. The grinding bead output pipe includes a grinding bead outlet, which is at the lowest point of the grinding bead output pipe.

2. The fuel cell slurry grinding bead cleaning system according to claim 1, characterized in that: The cleaning assembly includes a cleaning water tank, the cleaning guide barrel and the cleaning barrel are located in the water tank, the cleaning guide barrel is grid-shaped, the bottom of the cleaning barrel is provided with grid holes, and the side wall of the water tank is provided with an ultrasonic generator.

3. The fuel cell slurry grinding bead cleaning system according to claim 2, characterized in that: The water tank is provided with a cleaning water inlet and a cleaning wastewater outlet. The control unit controls the electromagnetic switch so that the cleaning water enters the water tank from the cleaning water inlet and the cleaning wastewater is discharged from the water tank from the cleaning wastewater outlet.

4. The fuel cell slurry grinding bead cleaning system according to claim 1, characterized in that: It comprises a recovery barrel for recovering precious metal materials in cleaning water. The cleaning component comprises several levels of cleaning components, and at least the cleaning wastewater discharged by the first level of cleaning components is output to the recovery barrel.

5. The fuel cell slurry grinding bead cleaning system according to claim 1, characterized in that: The drying component includes a drying fan. The airflow generated by the drying fan enters the water tank of the drying component through a drying air duct. A heating device is provided in the drying air duct.

6. The fuel cell slurry grinding bead cleaning system according to claim 1, characterized in that: The cleaning component includes several levels of cleaning components. When the last level of cleaning component inputs the grinding beads into the drying component, the control unit prompts to heat the grinding beads to be cleaned again.

7. The fuel cell slurry grinding bead cleaning system according to claim 1, characterized in that: The screening box is provided with a first layer of screening net and a second layer of screening net. The first layer of screening net is located above the second layer of screening net. The mesh size of the first layer of screening net is not smaller than the mesh size of the second layer of screening net. The difference between the mesh size of the first layer of screening net and the mesh size of the second layer of screening net is less than or equal to 0.6 mm.

8. The fuel cell slurry grinding bead cleaning system according to claim 1, characterized in that: When the grinding beads enter the screening module, the control unit controls the reminder device to issue an instruction to replace the screening box.

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