Fuel cell catalyst slurry cooling device and catalyst slurry conveying system

Abstract

The present invention relates to the technical field of fuel cell manufacturing, and provides a fuel cell catalyst slurry cooling device and a catalyst slurry conveying system. The fuel cell catalyst slurry cooling device is characterized by comprising: a material barrel for containing the catalyst slurry; a first temperature control device for adjusting the temperature of the material barrel; a sampler connected to the material barrel; and a second temperature control device for adjusting the temperature of the sampler. The fuel cell catalyst slurry cooling device and the catalyst slurry conveying system provided by the present invention adjust the temperature of the material barrel by setting the first temperature control device, and adjust the temperature of the sampler by setting the second temperature control device, so as to ensure that the catalyst slurry is stirred, dispersed, conveyed and spray-coated at an appropriate temperature, avoiding the problems of accelerated agglomeration and bubble generation caused by the increase in the temperature of the catalyst slurry, thereby improving the activity of the catalyst slurry.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell manufacturing, and particularly relates to a fuel cell catalyst slurry cooling device and a catalyst slurry conveying system. Background Art

[0002] As a new generation of clean and efficient energy storage method, hydrogen energy has been increasingly valued in the energy field. Among them, proton exchange membrane fuel cells are one of the important means for converting hydrogen energy into electrical energy. After a catalyst layer such as platinum-carbon material is uniformly coated on the surface of the proton exchange membrane, hydrogen can be ionized to release electrons, thereby achieving the conversion of hydrogen energy into electrical energy. Therefore, the proton exchange membrane with a catalyst coating is also called a fuel cell membrane electrode, which is the core component of a fuel cell; at the same time, this method can also be applied in reverse to electrolyze water to produce hydrogen, becoming a key component for hydrogen production. In the membrane electrode coating process, usually, nano-scale noble metal catalyst particles and carbon powder particles are first dispersed in organic solvents such as isopropanol and ethanol to prepare a catalyst suspension slurry. Since the catalyst powder particles are prone to sedimentation or agglomeration into large particles in the solvent, in order to avoid this phenomenon, it is necessary to continuously stir and disperse the catalyst slurry; during the coating process, such as spray coating, the catalyst slurry should also be kept uniformly dispersed during the stable transportation to the nozzle. The prior art generally treats the storage bucket and the liquid supply pump of the slurry by means of magnetic stirring or ultrasonic dispersion; in addition, since the catalyst slurry is very sensitive to temperature, the higher the temperature, the easier the catalyst particles are to agglomerate, and bubbles will be generated, seriously affecting the coating process of the catalyst. Therefore, it is usually necessary to keep the environment at a low temperature (below 25°C) during the catalyst coating process. However, since both the above-mentioned magnetic stirring or ultrasonic dispersion treatments will cause heat generation, resulting in the agglomeration of the catalyst slurry due to heat, sometimes the use of a stirring and dispersing device will cause the catalyst to be heated and the slurry to agglomerate more severely. The existence of this contradiction has been plaguing the production of fuel cell membrane electrodes.

[0003] Therefore, how to control the temperature of the catalyst slurry to prevent the catalyst from heating up during the dispersion and stirring operation, and avoid the accelerated agglomeration and bubble generation caused by heating is an urgent problem to be solved. Summary of the Invention

[0004] The present invention provides a fuel cell catalyst slurry cooling device and a catalyst slurry conveying system to solve the defects in the prior art that the catalyst slurry is heated up due to the dispersion and stirring operation, resulting in the accelerated agglomeration of the catalyst slurry and the generation of bubbles.

[0005] The present invention provides a fuel cell catalyst slurry cooling device, including:

[0006] A material bucket for containing the catalyst slurry;

[0007] A stirring mechanism, wherein the stirrer of the stirring mechanism is arranged inside the material barrel and is used for stirring and dispersing the catalyst slurry inside the material barrel;

[0008] A first temperature control device, which is used for adjusting the temperature of the material barrel;

[0009] A sampler, which is connected to the material barrel;

[0010] A second temperature control device, which is used for adjusting the temperature of the sampler.

[0011] According to a fuel cell catalyst slurry cooling device provided by the present invention, the first temperature control device includes:

[0012] A first thermoelectric cooler;

[0013] A first cold-end fan, which is arranged close to the first side of the first thermoelectric cooler, and a first cold-end heat sink is arranged between the first cold-end fan and the first thermoelectric cooler;

[0014] A first hot-end fan, which is arranged close to the second side of the first thermoelectric cooler, and a first hot-end heat sink is arranged between the first hot-end fan and the first thermoelectric cooler;

[0015] The second temperature control device includes:

[0016] A second thermoelectric cooler;

[0017] A second cold-end fan, which is arranged close to the first side of the second thermoelectric cooler, and a second cold-end heat sink is arranged between the second cold-end fan and the second thermoelectric cooler;

[0018] A second hot-end fan, which is arranged close to the second side of the second thermoelectric cooler, and a second hot-end heat sink is arranged between the second hot-end fan and the second thermoelectric cooler.

[0019] According to a fuel cell catalyst slurry cooling device provided by the present invention, it further includes:

[0020] A first outer shell, which is used for encapsulating the first temperature control device and the material barrel;

[0021] A second outer shell, which is used for encapsulating the second temperature control device and the sampler.

[0022] According to a fuel cell catalyst slurry cooling device provided by the present invention, it further includes:

[0023] A heat insulation plate, which is arranged between the first refrigerating sheet and the first housing to isolate the heat exchange spaces of the cold-end fan and the hot-end fan from each other;

[0024] A sealing strip, which is arranged at the connection between the first housing and the material barrel;

[0025] The first housing further includes: a first condensed water chamber, which is arranged below the first temperature control device;

[0026] The second housing further includes: a second condensed water chamber, which is arranged below the second temperature control device.

[0027] A fuel cell catalyst slurry cooling device according to the present invention further includes:

[0028] A first temperature sensor, which is arranged in the first housing and close to the material barrel for monitoring the temperature change of the material barrel;

[0029] A second temperature sensor, which is arranged in the second housing and close to the injector for monitoring the temperature change of the injector;

[0030] A temperature controller, which is respectively in signal connection with the first temperature sensor, the second temperature sensor, the first temperature control device and the second temperature control device, and is used for receiving the temperature data monitored by the first temperature sensor and the second temperature sensor and regulating the working states of the first temperature control device and the second temperature control device according to the temperature data.

[0031] A fuel cell catalyst slurry cooling device according to the present invention, wherein the injector includes:

[0032] An ultrasonic transducer, the ultrasonic emission end of which is provided with a horn, and the end of the horn is provided with a disc, and the diameter of the disc is larger than the diameter of the horn;

[0033] A syringe, which is provided with an injection cavity for accommodating the catalyst slurry, and the injection cavity is communicated with the material barrel;

[0034] A vibration film, and the ultrasonic emission end of the ultrasonic transducer is connected to the injection cavity through the vibration film.

[0035] A fuel cell catalyst slurry cooling device according to the present invention further includes: an adjusting ring, which is adjustably arranged between the ultrasonic emission end of the ultrasonic transducer and the vibration film for adjusting the distance between the ultrasonic emission end of the ultrasonic transducer and the vibration film.

[0036] A fuel cell catalyst slurry cooling device provided by the present invention, the syringe includes:

[0037] A piston barrel;

[0038] An injection barrel, the piston barrel is adaptively connected to the injection barrel, and the space formed between the piston barrel and the injection barrel constitutes the injection cavity; wherein,

[0039] The piston barrel includes:

[0040] A first housing for encapsulating the vibration film;

[0041] A second housing;

[0042] A third housing, the second housing and the third housing are used for encapsulating the ultrasonic transducer; wherein,

[0043] The adjustment ring is arranged between the first housing and the second housing.

[0044] A fuel cell catalyst slurry cooling device provided by the present invention further includes:

[0045] A piston cap fixed to one end of the piston barrel close to the injection barrel;

[0046] A gasket fixed to the outer edge of the vibration film;

[0047] A pressing ring, the first end of the pressing ring presses against the gasket, and the second end of the pressing ring presses against the piston cap, and the vibration film is pressed by the pressing ring and the gasket.

[0048] The present invention also provides a catalyst slurry delivery system, including:

[0049] A nozzle for spraying and coating the catalyst slurry;

[0050] A fuel cell catalyst slurry dispersion device for stirring and dispersing the catalyst slurry in the pipeline;

[0051] The fuel cell catalyst slurry cooling device provided by the present invention, the fuel cell catalyst slurry dispersion device is connected between the material bucket and the sampler and / or connected between the sampler and the nozzle.

[0052] A fuel cell catalyst slurry cooling device provided by the present invention adjusts the temperature of the material barrel through a first temperature control device and adjusts the temperature of the sampler through a second temperature control device, so as to ensure that the catalyst slurry is stirred, dispersed, transported, and spray-coated at an appropriate temperature, avoiding the problems of accelerated aggregation and bubble generation caused by the increase in the temperature of the catalyst slurry, thereby improving the activity of the catalyst slurry.

[0053] A catalyst slurry conveying system provided by the present invention not only realizes the cooling of the catalyst slurry and avoids the aggregation phenomenon caused by its temperature rise, but also stirs and disperses the catalyst slurry in the pipeline to further avoid the aggregation phenomenon caused by its sedimentation, thus solving the problem of aggregation of the catalyst slurry during transportation from two aspects. Brief Description of the Drawings

[0054] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0055] Figure 1 It is a schematic structural diagram of the material barrel and the first temperature control device in the first housing provided by the present invention;

[0056] Figure 2 It is a schematic structural diagram of the material barrel and the first cooling chamber provided by the present invention;

[0057] Figure 3 It is a schematic structural diagram of the first perspective of the first housing provided by the present invention;

[0058] Figure 4 It is a schematic structural diagram of the second perspective of the first housing provided by the present invention;

[0059] Figure 5 It is a schematic structural diagram of the first temperature control device provided by the present invention;

[0060] Figure 6 It is a schematic structural diagram of the stirring mechanism provided by the present invention;

[0061] Figure 7 It is a schematic structural diagram of the sampler and the second temperature control device in the second housing provided by the present invention;

[0062] Figure 8 It is a schematic structural diagram of the second housing provided by the present invention;

[0063] Figure 9 It is a schematic structural diagram of the second temperature control device provided by the present invention;

[0064] Figure 10 It is a schematic internal structure diagram of the sampler provided by the present invention from the first perspective;

[0065] Figure 11 It is a schematic internal structure diagram of the sampler provided by the present invention from the second perspective;

[0066] Figure 12 is Figure 11 a schematic structure diagram of the local part A in

[0067] Figure 13 It is a schematic structure diagram of the fuel cell catalyst slurry dispersion device provided by the present invention;

[0068] Figure 14 It is a schematic structure diagram of the vibration rod and the guide wire connected by welding provided by the present invention;

[0069] Figure 15 is Figure 14 a schematic structure diagram of the local part B in

[0070] Figure 16 It is a schematic structure diagram of the vibration rod and the guide wire connected by the first type of thread provided by the present invention;

[0071] Figure 17 is Figure 16 a schematic structure diagram of the local part C in

[0072] Figure 18 It is a schematic structure diagram of the vibration rod and the guide wire connected by the second type of thread provided by the present invention;

[0073] Figure 19 is Figure 18 a schematic structure diagram of the local part D in

[0074] Figure 20 It is a schematic structure diagram of the second nut provided by the present invention;

[0075] Figure 21 It is a schematic structure diagram of the catalyst slurry delivery system provided by the present invention.

[0076] Reference numerals:

[0077] 1: Barrel; 2: First temperature control device; 201: First thermoelectric cooler; 202: First cold-end fan; 203: First hot-end fan; 204: First hot-end heat sink; 205: First cold-end heat sink; 3: Sampler; 301: First ultrasonic transducer; 302: Vibration film; 303: Disc; 304: Adjusting ring; 310: Syringe; 311: Piston barrel; 312: Injection barrel; 313: First housing; 314: Second housing; 315: Third housing; 316: Piston cap; 317: Washer; 318: Pressing ring; 4: Second temperature control device; 401: Second thermoelectric cooler; 402: Second cold-end fan; 403: Second hot-end fan; 404: Second hot-end heat sink; 405: Second cold-end heat sink; 5: Stirring mechanism; 501: Motor; 502: Stirrer guide seat; 503: Stirrer; 6: First outer shell; 601: Heat insulation board; 602: Sealing strip; 603: First condensate chamber; 604: First cooling chamber; 7: Second outer shell; 701: Second condensate chamber; 702: Second cooling chamber; 8: First temperature sensor; 9: Temperature controller; 10: Nozzle; 11: Second ultrasonic transducer; 12: Vibration rod; 13: Guide wire; 14: Fixed disc; 15: First nut; 16: Second nut; 161: Biting part; 17: First cover; 18: Second cover; 19: Pipeline joint; 20: Three-way joint; 21: First infusion tube; 22: Second infusion tube; 23: Third infusion tube; 100: Fuel cell catalyst slurry dispersion device. Detailed implementation manners

[0078] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0079] The following Figures 1 - 12 describes a fuel cell catalyst slurry cooling device of the present invention. The fuel cell catalyst slurry cooling device includes: a barrel 1, a stirring mechanism 5, a first temperature control device 2, a sampler 3 and a second temperature control device 4.

[0080] Among them, the barrel 1 is used to hold the catalyst slurry; the first temperature control device 2 is used to adjust the temperature of the barrel 1; the sampler 3 is connected to the barrel 1; the second temperature control device 4 is used to adjust the temperature of the sampler 3.

[0081] Specifically, the catalyst slurry is stirred and dispersed in the drum 1, and the temperature of the drum 1 is adjusted by the first temperature control device 2; the stirred and dispersed catalyst slurry is further dispersed by the fuel cell catalyst slurry dispersion device 100 (specifically described in the embodiments hereinafter), and then is sprayed and coated through the injector 3 and the nozzle 10. During this process, the temperature of the injector 3 is adjusted by the second temperature control device 4. Generally speaking, since heat is generated during the stirring and dispersion process of the catalyst slurry, and it is necessary to ensure that the process is carried out at a low temperature during the coating process. Therefore, the first temperature control device 2 and the second temperature control device 4 adopt refrigeration devices to cool the catalyst slurry so that it always remains in an environment of 25°C.

[0082] Preferably, the drum is partially adjacent to the injector 3 and they are jointly installed on the Z-axis module of the spraying system. This can significantly shorten the lengths of both the liquid inlet pipe and the liquid outlet pipe of the injector 3 at the same time, reducing the risk of agglomeration of the catalyst slurry in the liquid pipes. And after the pipeline is shortened, the pressure for pumping and pushing the liquid is reduced, which can avoid the problem of air bubbles generated in the liquid pipe due to sealing problems.

[0083] A fuel cell catalyst slurry cooling device provided by the present invention adjusts the temperature of the drum 1 by setting the first temperature control device 2, and adjusts the temperature of the injector 3 by setting the second temperature control device 4, so as to ensure that the catalyst slurry is stirred, dispersed, transported, sprayed and coated at an appropriate temperature, avoiding the problems of accelerated agglomeration and air bubble generation caused by the increase in the temperature of the catalyst slurry, thereby improving the activity of the catalyst slurry.

[0084] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: a stirring mechanism 5, and the stirrer 503 of the stirring mechanism 5 is arranged in the drum 1 for stirring and dispersing the catalyst slurry inside the drum 1. As Figure 6 shown, the stirring mechanism 5 in this embodiment adopts a magnetic stirring assembly, which is arranged below the drum 1. Specifically, the stirring mechanism 5 includes: a stirring motor 501, a stirrer guide seat 502 and a stirrer 503. The stirring motor 501 drives the stirrer guide seat 502 to rotate. Due to the magnetic interaction between the stirrer guide seat 502 and the stirrer 503, the stirrer 503 also rotates accordingly. The stirrer 503 is placed into the drum 1, and the catalyst slurry in the drum 1 is stirred and dispersed by its rotation. Of course, according to the actual situation, other stirring devices can also be used to replace the above magnetic stirring assembly, and the present invention is not limited thereto.

[0085] In one embodiment of the present invention, the first temperature control device 2 includes: a first thermoelectric cooler 201, a first cold-end fan 202 and a first hot-end fan 203; the second temperature control device 4 includes: a second thermoelectric cooler 401, a second cold-end fan 402 and a second hot-end fan 403.

[0086] The first cold-end fan 202 is positioned near a first side of the first cooling fin 201, with a first cold-end heat sink 205 positioned between the first cold-end fan 202 and the first cooling fin 201. The first hot-end fan 203 is positioned near a second side of the first cooling fin 201, with a first hot-end heat sink 204 positioned between the first hot-end fan 203 and the first cooling fin 201. Specifically, the first cooling fin 201 is a semiconductor cooling fin, with the first cold-end fan 202 mounted on one side via the first cold-end heat sink 205 and the first hot-end fan 203 mounted on the other side via the first hot-end heat sink 204. The first cold-end fan 202 is positioned near the material barrel 1, and the first housing 6 forms a first cooling chamber 604 for accommodating the material barrel 1. The first cold-end fan 202 is used to cool the material barrel 1 in the first cooling chamber 604.

[0087] The second cold-end fan 402 is disposed near a first side of the second cooling fin 401, with a second cold-end heat sink 405 disposed between the second cold-end fan 402 and the second cooling fin 401. The second hot-end fan 403 is disposed near a second side of the second cooling fin 401, with a second hot-end heat sink 404 disposed between the second hot-end fan 403 and the second cooling fin 401. Specifically, the second cooling fin 401 is a semiconductor cooling fin, with the second cold-end fan 402 mounted on one side via the second cold-end heat sink 405 and the second hot-end fan 403 mounted on the other side via the second hot-end heat sink 404. The second cold-end fan 402 is disposed near the injector 3 for cooling the injector 3. The second housing 7 forms a second cooling chamber 702 for accommodating the injector 3. The second cold-end fan 402 is used to cool the injector 3 within the second cooling chamber 702.

[0088] Furthermore, one side of the semiconductor refrigeration sheet is tightly fitted to the cold-end heat sink through thermal grease, and the other side is tightly fitted to the hot-end heat sink through thermal grease, and fans are installed on the heat sinks; the cold-end fan blows cold air into the cooling chamber for cooling, that is, blows cold air to the barrel 1 / injector 3. The use of semiconductor refrigeration sheets to cool the barrel 1 and the injector 3 can achieve a more efficient cooling effect, and has a small volume. The barrel 1 does not contact the water bath (the barrel 1 is usually cooled by placing it in an ice water bath or circulating water cooling), which can reduce the inconvenience caused by the outer wall of the barrel 1 getting wet and needing to be replaced. The above-mentioned heat sinks are all made of materials with high thermal conductivity, generally aluminum. In order to prevent the heat dissipation at the hot end from affecting the cooling effect, the hot-end heat sink is away from the cold-end heat sink, and is connected in the middle by a thermally conductive material.

[0089] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: a first outer shell 6 and a second outer shell 7. Among them, the first outer shell 6 is used to encapsulate the first temperature control device 2 and the material barrel 1, so as to reduce temperature loss; the second outer shell 7 is used to encapsulate the second temperature control device 4 and the injector 3, so as to reduce temperature loss. Further, the first outer shell 6 is provided with an air inlet and an air outlet at the position of the first temperature control device 2, and the second outer shell 7 is provided with an air inlet and an air outlet at the position of the second temperature control device 4, so as to facilitate heat exchange by the fan; the first outer shell 6 and the second outer shell 7 are respectively provided with observation windows, and the observation windows are made of transparent plastic or glass, which is convenient for users to observe the catalyst slurry in the container; both the first outer shell 6 and the second outer shell 7 are made of materials with poor thermal conductivity, such as plastic.

[0090] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: a heat insulation plate 601 and a sealing strip 602. Among them, the heat insulation plate 601 is arranged between the first refrigeration chip 201 and the first outer shell 6 to isolate the heat exchange space between the cold-end fan and the hot-end fan; the sealing strip 602 is arranged at the connection between the first outer shell 6 and the material barrel 1. In this embodiment, by setting the heat insulation plate 601, the heat exchange occurring between the left and right sides of the first refrigeration chip 201 is reduced, thereby reducing heat loss; by setting the sealing strip 602, the cold generated by the first temperature control device 2 is reduced from leaking to the environment, thereby further reducing heat loss.

[0091] In one embodiment of the present invention, the first outer shell 6 further includes: a first condensate chamber 603, and the first condensate chamber 603 is arranged below the first temperature control device 2; the second outer shell 7 further includes: a second condensate chamber 701, and the second condensate chamber 701 is arranged below the second temperature control device 4. In this embodiment, by arranging the first condensate chamber 603 below the first temperature control device 2, it is used to recover the condensate generated when the first temperature control device 2 and the material barrel 1 are cooled; by arranging the second condensate chamber 701 below the second temperature control device 4, it is used to recover the condensate generated when the second temperature control device 4 and the injector 3 are cooled. Further, the first condensate chamber 603 and the second condensate chamber 701 are provided with drain holes and plugs for discharging condensate. Furthermore, a hydrophobic coating is provided on the inner wall of the first outer shell 6 at the position of the material barrel 1 and the inner wall of the second outer shell 7 at the position of the injector 3, which can make the condensate quickly slide down into the condensate chamber without adhering to the surface.

[0092] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: a first temperature sensor 8, a second temperature sensor (not shown in the figure), and a temperature controller 9. Among them, the first temperature sensor 8 is disposed inside the first housing 6 and close to the material barrel 1 for monitoring the temperature change of the material barrel 1; the second temperature sensor is disposed inside the second housing 7 and close to the injector 3 for monitoring the temperature change of the injector 3; the temperature controller 9 is respectively signal-connected to the first temperature sensor 8, the second temperature sensor, the first temperature control device 2, and the second temperature control device 4, and is used for receiving the temperature data monitored by the first temperature sensor 8 and the second temperature sensor and regulating the working states of the first temperature control device 2 and the second temperature control device 4 according to the temperature data. In this embodiment, the temperature near the material barrel 1 is monitored by the first temperature sensor 8, the temperature near the injector 3 is monitored by the second temperature sensor, and the monitored temperature data is transmitted to the temperature controller 9. The temperature controller 9 adjusts the working states of the first temperature control device 2 and the second temperature control device 4 according to the above temperature data. Specifically, the temperature controller 9 can adjust the rotation speeds of the cold-end fan and the hot-end fan and adjust the current passing through the thermoelectric cooler.

[0093] In one embodiment of the present invention, the injector 3 includes: a first ultrasonic transducer 301, a syringe 310, and a vibrating film 302. Among them, the syringe 310 is provided with an injection cavity for accommodating the catalyst slurry, and the injection cavity is communicated with the material barrel 1; the ultrasonic emission end of the first ultrasonic transducer 301 is connected to the injection cavity through the vibrating film 302. Specifically, the first ultrasonic transducer 301 in this embodiment can convert electromagnetic energy into mechanical energy (acoustic energy), and the ultrasonic waves generated by it are transmitted to the catalyst slurry in the injection cavity through the vibrating film 302, and the catalyst slurry is stirred by the vibration of the sound waves. In this embodiment, the catalyst slurry in the material barrel 1 is fully stirred and dispersed by the stirring mechanism 5, and the catalyst slurry in the syringe 310 can also be ultrasonically vibrated and stirred by the first ultrasonic transducer 301 and the vibrating film 302, so that the catalyst slurry in each structure can be fully stirred and dispersed to avoid agglomeration. Preferably, the vibrating film 302 is made of materials such as stainless steel, titanium alloy, and polymer film.

[0094] Furthermore, a horn is provided at the ultrasonic emission end of the first ultrasonic transducer 301, a disc 303 is provided at the end of the horn, and the diameter of the disc 303 is larger than that of the horn. The first ultrasonic transducer 301 is connected to the vibrating film 302 through the disc 303. The vibration of the first ultrasonic transducer 301 is amplified in amplitude by the horn, and the disc structure at the top can further amplify the amplitude of the ultrasonic vibration and the radiation area of the ultrasonic vibration.

[0095] The injector 3 in the above embodiments has the following advantages: 1. The ultrasonic emission end of the first ultrasonic transducer 301 does not directly contact the catalyst slurry, but is transmitted to the catalyst slurry through the vibration film 302, which prevents contamination and there is no dead volume residual liquid; 2. The front end of the first ultrasonic transducer 301 is a large-diameter disc 303, which can increase the amplitude of the first ultrasonic transducer 301 and at the same time expand the effective area of ultrasonic radiation; 3. Since the vibration film 302 can use a non-metallic film, all parts in contact with the liquid are non-metallic, improving the anti-corrosion performance.

[0096] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: an adjustment ring 304, which is adjustably disposed between the ultrasonic emission end of the first ultrasonic transducer 301 and the vibration film 302 for adjusting the distance between the ultrasonic emission end of the first ultrasonic transducer 301 and the vibration film 302. In this embodiment, the gap between the ultrasonic emission end and the vibration film 302 is adjusted by adjusting the length of the adjustment ring 304, thereby adjusting the amplitude of the vibration film 302. If the ultrasonic emission end and the vibration film 302 are too loose, the ultrasonic wave transmission loss is large; if the ultrasonic emission end and the vibration film 302 are too tight, the performance of the ultrasonic transducer will decline, resulting in a decline in the vibration effect. Therefore, an appropriate degree of fit is the key to ultrasonic vibration. Preferably, the adjustment ring 304 can adopt a threaded structure, and the gap between the ultrasonic emission end (i.e., the disc 303) and the vibration film 302 is adjusted by rotating the adjustment ring 304, that is, the tightness between the ultrasonic emission end and the vibration film 302 is adjusted.

[0097] In one embodiment of the present invention, the syringe 310 includes: a piston barrel 311 and a syringe barrel 312. The piston barrel 311 is adaptively connected to the syringe barrel 312, and the space formed between the piston barrel 311 and the syringe barrel 312 constitutes an injection chamber. Among them, the piston barrel 311 includes: a first housing 313, a second housing 314, and a third housing 315. The first housing 313 is used to encapsulate the vibration film 302; the second housing 314 and the third housing 315 are used to encapsulate the first ultrasonic transducer 301; an adjustment ring 304 is arranged between the first housing 313 and the second housing 314. Specifically, in addition to adjusting the tightness between the ultrasonic emission end and the vibration film 302, the adjustment ring 304 also has the following functions: the first housing 313, the adjustment ring 304, and the second housing 314 all have threaded structures. The first housing 313 and the adjustment ring 304 are screwed onto the end of the second housing 314 through the threaded structures, and it is ensured that the adjustment ring 304 and the first housing 313 are tightened against each other on the second housing 314, which can prevent the first housing 313 from loosening. Further, a sealing ring (equivalent to a washer structure) can be arranged between the first housing 313 and the adjustment ring 304 to further prevent the first housing 313 from loosening. It can be understood that adjusting the tightness between the ultrasonic emission end and the vibration film 302 can also be achieved by rotating the adjustment ring 304 and the first housing 313 to adjust their positions on the second housing 314.

[0098] Further, the second housing 314 and the third housing 315 clamp the first ultrasonic transducer 301 through threaded connection. A flange is provided at the front end of the first ultrasonic transducer 301, and the first ultrasonic transducer 301 contacts the second housing 314 and / or the third housing 315 through the flange. That is, the first ultrasonic transducer 301 only contacts the outer shell at the flange, and the other places are all suspended, so that the energy loss of the ultrasonic wave can be minimized.

[0099] In one embodiment of the present invention, the fuel cell catalyst slurry cooling device further includes: a piston cap 316, a gasket 317, and a compression ring 318. The piston cap 316 is fixed to one end of the piston cylinder 311 close to the injection cylinder 312; the gasket 317 is fixed to the outer edge of the vibration film 302; the first end of the compression ring 318 is pressed against the gasket 317, and the second end of the compression ring 318 is pressed against the piston cap 316, and the vibration film 302 is pressed by the compression ring 318 and the gasket 317. Specifically, the piston cap 316 presses the gasket 317 through the compression ring 318, and the gasket 317 then presses the vibration film 302, so that the vibration film 302 is in a taut state, increasing its elasticity, so that the vibration film 302 can generate vibrations more effectively; at the same time, it is convenient to disassemble and replace the vibration film 302, making the vibration film 302 a consumable. The piston cap 316 is generally made of polytetrafluoro material, which can ensure the functions of anti-corrosion and sealed sliding. In this embodiment, the compression ring 318 presses the gasket 317 to play a sealing role; at the same time, it clamps the piston cap 316 to prevent it from falling off the piston cylinder 311.

[0100] As Figure 21 shown, the present invention also provides a catalyst slurry delivery system. The catalyst slurry delivery system includes: a nozzle 10, a fuel cell catalyst slurry dispersion device 100, and the fuel cell catalyst slurry cooling device in the above embodiment.

[0101] Among them, the nozzle 10 is used for spraying and coating the catalyst slurry, and an ultrasonic nozzle 10 is adopted in this embodiment; the fuel cell catalyst slurry dispersion device 100 is used for stirring and dispersing the catalyst slurry in the pipeline; the fuel cell catalyst slurry dispersion device 100 is connected between the material bucket 1 and the sampler 3 and / or connected between the sampler 3 and the nozzle 10.

[0102] The catalyst slurry delivery system provided by the present invention not only realizes the cooling of the catalyst slurry and avoids the agglomeration phenomenon caused by temperature rise, but also further avoids the agglomeration phenomenon caused by sedimentation by stirring and dispersing the catalyst slurry in the pipeline, thus solving the problem of agglomeration of the catalyst slurry during transportation from two aspects.

[0103] Next, in conjunction with Figures 13 - 20 a description will be given of a fuel cell catalyst slurry dispersion device 100 of the present invention. The fuel cell catalyst slurry dispersion device 100 includes: a vibration mechanism, a guide wire 13, and an infusion tube. Among them, the vibration mechanism can generate vibrations; the first end of the guide wire 13 is connected to the vibration mechanism; the infusion tube is filled with the catalyst slurry, and the guide wire 13 is arranged in the infusion tube along the length direction of the infusion tube, and the guide wire 13 can transmit the vibrations generated by the vibration mechanism to the catalyst slurry in the infusion tube.

[0104] Specifically, the drum 1 for containing the catalyst slurry is connected to the injector 3 through the above-mentioned infusion tube and / or the injector 3 is connected to the ultrasonic nozzle 10 through the above-mentioned infusion tube. The vibration generated by the vibration mechanism is transmitted to the catalyst slurry inside the infusion tube through the wire 13, so that the catalyst slurry inside the infusion tube can be stirred and dispersed, avoiding the agglomeration of the catalyst slurry.

[0105] Furthermore, the diameter of the wire 13 is much smaller than that of the infusion tube, and it can extend along the infusion tube all the time. Even if the infusion tube is long and has a large diameter, the vibration can be transmitted to the catalyst slurry through the wire 13, thus avoiding the agglomeration of the catalyst slurry in the infusion tube with a long length and a large diameter.

[0106] A fuel cell catalyst slurry dispersion device 100 provided by the present invention generates vibration through a vibration mechanism and transmits the vibration to the catalyst slurry in the infusion tube through the wire 13, so that the catalyst slurry inside the infusion tube can be stirred and dispersed. Even when the catalyst slurry is transported in an infusion tube with a long length and a large diameter, the agglomeration of the catalyst slurry can be avoided, thereby improving the activity of the catalyst slurry.

[0107] In one embodiment of the present invention, the vibration mechanism adopts an ultrasonic vibration mechanism, which specifically includes: a second ultrasonic transducer 11 and a vibration rod 12. Among them, the second ultrasonic transducer 11 can emit ultrasonic waves; the first end of the vibration rod 12 is connected to the second ultrasonic transducer 11, and the second end of the vibration rod 12 is connected to the first end of the wire 13 for transmitting the ultrasonic waves generated by the second ultrasonic transducer 11 to the wire 13. The second ultrasonic transducer 11 can emit ultrasonic waves, transmit the ultrasonic vibration to the wire 13 through the vibration rod 12, and the wire 13 emits ultrasonic waves around in the infusion tube to stir the catalyst slurry through the vibration of the sound wave. Specifically, the second ultrasonic transducer 11 and the vibration rod 12 can be connected by a screw.

[0108] Preferably, the length of the wire 13 should satisfy an integer multiple of the half wavelength of the ultrasonic vibration; the diameter of the wire 13 is 0.2 mm, and it is made of titanium alloy or stainless steel. The diameter of the fine hole at the front end of the vibration rod 12 is 0.5 mm and the depth is 1 mm; during operation, the second ultrasonic transducer 11 transmits ultrasonic energy to the vibration rod 12, and the vibration rod 12 further increases the amplitude of the ultrasonic vibration and transmits it to the wire 13. The ultrasonic wave continues to be transmitted along the wire 13. Since the wire 13 and the vibration rod 12 are in long-term contact with the slurry liquid, they can be replaced regularly as consumables.

[0109] In one embodiment of the present invention, there are multiple connection methods between the vibrating rod 12 and the guide wire 13. One of them is that the second end of the vibrating rod 12 is connected to the first end of the guide wire 13 by welding. In this embodiment, the vibrating rod 12 and the guide wire 13 are integrated by welding and cannot be disassembled. When replacement is needed, both the vibrating rod 12 and the guide wire 13 need to be removed together.

[0110] In one embodiment of the present invention, there are multiple connection methods between the vibrating rod 12 and the guide wire 13. One of them is that the fuel cell catalyst slurry dispersion device 100 further includes a first connection part. The second end of the vibrating rod 12 is provided with a second connection part, and the second connection part is adapted to be detachably connected to the first connection part. The first connection part is fixedly connected to the first end of the guide wire 13. Specifically, the first connection part includes a fixed disk 14 and a first nut 15. Among them, the fixed disk 14 is fixedly connected to the first end of the guide wire 13; the fixed disk 14 is press-fitted and fixed to the first nut 15; the second connection part includes a first threaded part, and the first threaded part is detachably connected to the first nut 15. In this embodiment, the vibrating rod 12 and the guide wire 13 are detachably connected by a threaded connection method. Specifically, the first nut 15 provided on the guide wire 13 can be matched with the first threaded part provided at the second end of the vibrating rod 12. In this embodiment, the vibrating rod 12 and the guide wire 13 can be separated or combined by rotating the first nut 15 with a tool. As consumables, the vibrating rod 12 and the guide wire 13 are convenient for individual installation, removal and replacement.

[0111] In one embodiment of the present invention, there are multiple connection methods between the vibrating rod 12 and the guide wire 13. One of them is that as a second threaded connection method that can replace the above embodiment, the first connection part includes a second nut 16. One end of the second nut 16 has a biting part 161, and the biting part 161 is bite-connected to the first end of the guide wire 13; the second connection part includes a second threaded part, and the second threaded part is detachably connected to the second nut 16. In this embodiment, a special second nut 16 is designed to replace the first nut 15 and the fixed disk 14 in the above embodiment. In this embodiment, the second nut 16 is bite-fixed to the guide wire 13 through its biting part 161. By rotating the second nut 16 with a tool, the separation or combination of the guide wire 13 and the vibrating rod 12 can be achieved, which is convenient for the individual installation, removal and replacement of the vibrating rod 12 and the guide wire 13.

[0112] Further, the biting part 161 includes a conical structure, and the conical structure is composed of a plurality of notches circumferentially arranged around the axis of the second nut 16. The plurality of notches are bite-connected to the first end of the guide wire 13. Specifically, as Figure 20As shown, a small circular hole is formed in the center surrounded by multiple notches, and the guide wire 13 is bite-fixed to the second nut 16 through the small circular hole. When the guide wire 13 needs to be replaced, only the second nut 16 needs to be rotated to remove it, and the guide wire 13 will be removed together.

[0113] In one embodiment of the present invention, the fuel cell catalyst slurry dispersion device 100 further includes: a first cover 17 and a second cover 18. Among them, the first cover 17 is used to encapsulate the second ultrasonic transducer 11; the second cover 18 is connected to the first cover 17, and the second cover 18 is used to encapsulate the vibrating rod 12 through a seal (a sealing ring can be used). In this embodiment, the second ultrasonic transducer 11 and the vibrating rod 12 can be removed by removing the first cover 17 and the second cover 18; further, a flange is provided at the variable diameter of the vibrating rod 12, and there is a thread on the flange. The second cover 18 is fixed on the vibrating rod 12 through the thread and the sealing ring, which can reduce the dead volume of liquid residue, and separate the second ultrasonic transducer 11 and the vibrating rod 12 into two parts. The vibrating rod 12 and the housing part can be removed from the second ultrasonic transducer 11 for cleaning or replacement, which is convenient for later maintenance.

[0114] In one embodiment of the present invention, the fuel cell catalyst slurry dispersion device 100 further includes: a pipeline joint 19 and a tee joint 20; the infusion tube includes: a first infusion tube 21, a second infusion tube 22 and a third infusion tube 23. Among them, the first end of the pipeline joint 19 is connected to the vibration mechanism; the tee joint 20 includes a first joint, a second joint and a third joint that are interconnected; the first end of the first infusion tube 21 is connected to the second end of the pipeline joint 19, and the second end of the first infusion tube 21 is connected to the first joint; the second infusion tube 22 is connected to the second joint; the third infusion tube 23 is connected to the third joint. Specifically, the guide wire 13 is connected to the vibrating rod 12 and sequentially passes through the second cover 18, the pipeline joint 19, the first infusion tube 21, the tee joint 20 and the second infusion tube 22, and is used to stir and disperse the catalyst slurry inside the first infusion tube 21 and the second infusion tube 22. It should be understood that one of the second infusion tube 22 and the third infusion tube 23 is the liquid inlet tube, and the other is the liquid outlet tube. In this embodiment, the third infusion tube 23 is the liquid inlet tube, and the second infusion tube 22 is the liquid outlet tube; optionally, the second infusion tube 22 is connected to the ultrasonic nozzle 10, and the third infusion tube 23 is connected to the sampler 3.

[0115] As Figure 21As shown in the figure, the present invention also provides a catalyst slurry conveying system. The catalyst slurry conveying system includes: a material bucket 1, a sampler 3, a nozzle 10, and the fuel cell catalyst slurry dispersion device 100 in the above embodiment. Among them, the material bucket 1 is provided with a first temperature control device 2; the sampler 3 is provided with a second temperature control device 4; the fuel cell catalyst slurry dispersion device 100 is connected between the material bucket 1 and the sampler 3 and / or connected between the sampler 3 and the nozzle 10.

[0116] The catalyst slurry conveying system provided by the present invention not only realizes the stirring and dispersion of the catalyst slurry in the pipeline, avoiding the agglomeration phenomenon caused by its settlement, but also cools the catalyst slurry through the first temperature control device 2 and the second temperature control device 4, avoiding the agglomeration phenomenon caused by its temperature rise, thereby solving the problem of agglomeration of the catalyst slurry during the conveying process from two aspects.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fuel cell catalyst slurry cooling device, characterized in that, Comprising: A material barrel for containing a catalyst slurry; A stirring mechanism, the stirrer of the stirring mechanism is arranged inside the material barrel for stirring and dispersing the catalyst slurry inside the material barrel; A first temperature control device for regulating the temperature of the material barrel; A sampler connected to the material barrel; A second temperature control device for regulating the temperature of the sampler; The sampler includes: An ultrasonic transducer, a horn is provided at the ultrasonic emission end of the ultrasonic transducer, a disc is provided at the end of the horn, and the diameter of the disc is larger than the diameter of the horn; A syringe having an injection cavity for accommodating the catalyst slurry, and the injection cavity communicates with the material barrel; A vibration film, and the ultrasonic emission end of the ultrasonic transducer is connected to the injection cavity through the vibration film.

2. The fuel cell catalyst slurry cooling device according to claim 1, wherein The first temperature control device includes: A first thermoelectric cooler; A first cold-end fan arranged close to the first side of the first thermoelectric cooler, and a first cold-end heat sink is arranged between the first cold-end fan and the first thermoelectric cooler; A first hot-end fan arranged close to the second side of the first thermoelectric cooler, and a first hot-end heat sink is arranged between the first hot-end fan and the first thermoelectric cooler; The second temperature control device includes: A second thermoelectric cooler; A second cold-end fan arranged close to the first side of the second thermoelectric cooler, and a second cold-end heat sink is arranged between the second cold-end fan and the second thermoelectric cooler; A second hot-end fan arranged close to the second side of the second thermoelectric cooler, and a second hot-end heat sink is arranged between the second hot-end fan and the second thermoelectric cooler.

3. The fuel cell catalyst slurry cooling device according to claim 2, wherein Further comprising: A first outer shell for encapsulating the first temperature control device and the material barrel; A second outer shell for encapsulating the second temperature control device and the sampler.

4. The fuel cell catalyst slurry cooling device according to claim 3, characterized in that, Further comprising: A heat insulation board arranged between the first thermoelectric cooler and the first outer shell to isolate the heat exchange spaces of the cold-end fan and the hot-end fan from each other; A sealing strip arranged at the connection between the first outer shell and the material barrel; The first outer shell further includes: a first condensate chamber arranged below the first temperature control device; The second outer shell further includes: a second condensate chamber arranged below the second temperature control device.

5. The fuel cell catalyst slurry cooling device according to claim 3, characterized in that, Further comprising: A first temperature sensor arranged inside the first outer shell and close to the material barrel for monitoring the temperature change of the material barrel; A second temperature sensor arranged inside the second outer shell and close to the sampler for monitoring the temperature change of the sampler; A temperature controller, which is respectively signal-connected to the first temperature sensor, the second temperature sensor, the first temperature control device and the second temperature control device, and is configured to receive the temperature data monitored by the first temperature sensor and the second temperature sensor and regulate the working states of the first temperature control device and the second temperature control device according to the temperature data.

6. The fuel cell catalyst slurry cooling device according to claim 1, characterized in that, It further includes: An adjustment ring, which is adjustably arranged between the ultrasonic emission end of the ultrasonic transducer and the vibration film, and is used to adjust the distance between the ultrasonic emission end of the ultrasonic transducer and the vibration film.

7. The fuel cell catalyst slurry cooling device according to claim 6, wherein, The syringe includes: A piston barrel; An injection barrel, the piston barrel is adaptively connected to the injection barrel, and the space formed between the piston barrel and the injection barrel constitutes the injection cavity; wherein, The piston barrel includes: A first housing, which is used to encapsulate the vibration film; A second housing; A third housing, the second housing and the third housing are used to encapsulate the ultrasonic transducer; wherein, The adjustment ring is arranged between the first housing and the second housing.

8. The fuel cell catalyst slurry cooling device according to claim 7, wherein, It further includes: A piston cap, which is fixed to one end of the piston barrel close to the injection barrel; A gasket, which is fixed to the outer edge of the vibration film; A pressing ring, the first end of the pressing ring presses against the gasket, and the second end of the pressing ring presses against the piston cap, and the vibration film is pressed by the pressing ring and the gasket.

9. A catalyst slurry conveying system, characterized in that, It includes: A nozzle, which is used for spraying and coating the catalyst slurry; A fuel cell catalyst slurry dispersion device, which is used for stirring and dispersing the catalyst slurry in the pipeline; The fuel cell catalyst slurry cooling device according to any one of claims 1 to 8, the fuel cell catalyst slurry dispersion device is connected between the material bucket and the sampler and / or connected between the sampler and the nozzle.

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