A proton exchange membrane fuel cell catalyst slurry dispersion device

Abstract

The present invention discloses a proton exchange membrane fuel cell catalyst slurry dispersion device, including a liquid storage barrel and a stirring and dispersing system. The stirring and dispersing system includes a high-speed flow channel structure, a high-speed impeller structure and a first drive unit; the high-speed flow channel structure is arranged in the liquid storage barrel and includes an impeller shaft, blades and a top cover; the impeller shaft is vertically arranged in the cavity, and the upper end of the impeller shaft is connected to the first drive unit; a high-speed flow channel with a radial cross-section gradually decreasing from bottom to top is formed between the impeller shaft and the wall of the cavity; the blades are fixed on the impeller shaft and located at the lower end of the cavity; the top cover is fixed on the impeller shaft and located above the top end of the high-speed flow channel structure, and a radially through gap is provided between the top cover and the top end face of the high-speed flow channel structure. The present invention can strengthen the convection circulation of the slurry in the vertical plane, enhance the mixing and stirring of the slurry components, suppress the scope of the local high-temperature area, weaken the degree of agglomeration of the particles, and effectively promote the faster bursting of bubbles.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cell manufacturing, and particularly relates to a dispersion device for proton exchange membrane fuel cell catalyst slurry. Background Art

[0002] Proton exchange membrane fuel cell (PEMFC) is a clean and efficient power generation device. Due to its unique advantages of high power density, high power generation efficiency, zero carbon emission during operation, and operating temperature close to the ambient temperature, it has received extensive attention and in-depth research in recent years.

[0003] The core component of a proton exchange membrane fuel cell is the membrane electrode. It is a multi-layer composite structure. Among them, the catalyst layer is the core part where electrochemical reactions occur to generate electrical energy. The main mass production process of the catalyst layer includes the preparation of catalyst slurry, the coating process, and the drying and curing process. The components of the catalyst slurry generally include nanoscale platinum-carbon particles, perfluorosulfonic acid ionomer, and alcohol solvents. These nanoscale particles have small particle sizes and are easily affected by electrostatic force, van der Waals force, etc., resulting in agglomeration and sedimentation. The uniformity and stability of the slurry directly affect the process accuracy and product quality of the coating process, and are important factors determining the electrochemical performance, life, and production capacity of the membrane electrode.

[0004] Therefore, the dispersion device for preparing the slurry needs to fully disperse the particles in the slurry through dispersion methods such as stirring and high-speed shearing. At the same time, the shear flow of the high-viscosity slurry and the heat generated by the equipment due to various factors will lead to local high-temperature areas. High temperature is an unfavorable factor for the agglomeration of slurry particles. Therefore, heat dissipation issues need to be fully considered during the dispersion process. In addition, bubbles are extremely likely to be generated during the slurry dispersion process. The slurry containing bubbles will lead to serious structural defects on the membrane electrode during the coating process and be discarded, reducing the yield of the membrane electrode. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide a dispersion device for proton exchange membrane fuel cell catalyst slurry, which can strengthen the convective circulation of the slurry in the vertical plane, enhance the mixing and stirring of the slurry components, inhibit the range of local high-temperature areas, weaken the degree of particle agglomeration, and at the same time, effectively promote the bursting of bubbles.

[0006] The dispersion device for proton exchange membrane fuel cell catalyst slurry according to an embodiment of the present invention includes:

[0007] A liquid storage bucket for storing the slurry;

[0008] Stirring and dispersing system, the stirring and dispersing system includes a high-speed flow channel structure, a high-speed impeller structure and a first driving unit; the high-speed flow channel structure is arranged in the liquid storage bucket, and the high-speed flow channel structure has a vertically penetrating cavity; the high-speed impeller structure includes an impeller shaft, blades and a top cover; the impeller shaft is vertically arranged in the cavity, the upper end of the impeller shaft extends out of the liquid storage bucket and is connected with the first driving unit, and the first driving unit is used to drive the impeller shaft to rotate forward; a high-speed flow channel with a gradually decreasing radial cross-section from bottom to top is formed between the impeller shaft and the wall of the cavity; the blades are fixed on the impeller shaft and are located at the lower end of the cavity; the top cover is fixed on the impeller shaft and is located above the top end of the high-speed flow channel structure, and there is a radially penetrating gap between the top cover and the top end face of the high-speed flow channel structure.

[0009] When the catalyst slurry dispersion device of the embodiment of the present invention is in use, the slurry is placed in the liquid storage bucket, the first driving unit drives the impeller shaft to rotate forward, driving the blades to rotate at a high speed. The blades rotating at a high speed push the slurry at the bottom of the liquid storage bucket and near the impeller shaft to flow upward from the bottom end of the high-speed flow channel at a relatively high speed, thereby causing the slurry around the liquid storage bucket to flow downward. Since the radial cross-section of the high-speed flow channel gradually becomes smaller from bottom to top, the slurry in the high-speed flow channel can be accelerated. That is to say, when the high-speed flow channel structure and the high-speed impeller structure cooperate with each other, the slurry in the high-speed flow channel can be accelerated to flow upward at a higher speed. When the slurry in the high-speed flow channel flows to the top end of the high-speed flow channel, it is blocked by the lower surface of the top cover, and the flow direction deflects radially and flows out from the gap between the top cover and the top end face of the high-speed flow channel structure, and then tends to continue to flow radially at a high speed for a certain distance. The above process improves the flow circulation intensity in the vertical section of the liquid storage bucket, thereby promoting the mixing of slurry components at different depths and improving the dispersion effect. At the same time, through this circulating flow, the slurry in the high-temperature areas near the side wall and bottom surface of the liquid storage bucket is convectively circulated to other areas, suppressing the range of local high-temperature areas, making the temperature distribution inside the liquid storage bucket more uniform, and suppressing the agglomeration phenomenon of catalyst particles caused by high temperature.

[0010] In addition, since the blades rotating at high speed push the slurry to flow upward from the bottom of the liquid storage barrel along the high-speed flow channel, the bubbles that may exist are driven to move upward. As the bubbles float upward, the depth decreases and the pressure drops, causing the bubbles to continuously expand. As the cross-sectional area of the high-speed flow channel gradually decreases, the slurry will accelerate, resulting in a further decrease in pressure, prompting the bubbles to further expand and increase in volume, so that the bubbles are subjected to a greater buoyancy force and further accelerate to float upward, thereby reducing the number of bubbles aggregated inside the slurry. The bubbles with an increased volume have poor stability and are more likely to burst. Therefore, when the cross-sectional area of the high-speed flow channel gradually decreases, the bubbles that further expand and increase in volume partially burst inside the slurry, and the unburst bubbles that further expand and increase in volume tend to flow out from the gap towards the lower surface of the top cover when the slurry flows radially at high speed through the gap, float on the slurry liquid surface, and become unstable and burst faster under the disturbance of the outside world.

[0011] The proton exchange membrane fuel cell catalyst slurry dispersion device according to the embodiment of the present invention has the following advantages: Through the cooperation of the high-speed impeller structure and the high-speed flow channel structure, the convective circulation of the slurry in the vertical plane is strengthened, the mixing and stirring of the slurry components are enhanced, the range of the local high-temperature area is inhibited, and the degree of particle agglomeration is weakened. At the same time, it can effectively prompt the bubbles to burst faster.

[0012] In some embodiments, a plurality of high-shear flow channels are distributed at intervals at the top end of the high-speed flow channel structure.

[0013] In some embodiments, the gap extends obliquely upward from the inside to the outside in the radial direction.

[0014] In some embodiments, the top end face of the high-speed flow channel structure is parallel to the lower surface of the top cover.

[0015] In some embodiments, the impeller shaft is a hollow shaft; the stirring and dispersing system further includes a stirring paddle structure and a second driving unit; the stirring paddle structure includes a transmission shaft and paddle blades, the transmission shaft is coaxially arranged in the impeller shaft, the upper end and the lower end of the transmission shaft respectively extend out of the upper end and the lower end of the impeller shaft, the upper end of the transmission shaft is connected to the second driving unit, the paddle blades are arranged outside the high-speed flow channel structure, and the paddle blades are respectively fixed to the transmission shaft and the high-speed flow channel structure.

[0016] In some embodiments, the paddle blades include vertical beams and a plurality of cross beams distributed at intervals up and down. One end of each of the plurality of cross beams is connected to the vertical beam, the other end of the lowermost one of the plurality of cross beams is fixed to the lower end of the transmission shaft, and the other ends of the remaining cross beams of the plurality of cross beams are fixed to the high-speed flow channel structure.

[0017] In some embodiments, the blade further includes spoiler blocks, which are arranged on the vertical beam.

[0018] In some embodiments, there are multiple spoiler blocks, and the multiple spoiler blocks are vertically and spaced apart on the vertical beam.

[0019] In some embodiments, the blade has a heat exchange function.

[0020] In some embodiments, the liquid storage bucket includes a bucket body and a bucket cover. The bucket cover covers the bucket opening of the bucket body. An opening for the impeller shaft to pass through is provided on the bucket cover, and a feeding structure is provided on the bucket cover; a discharging structure is provided at the bottom of the bucket body.

[0021] In some embodiments, a cooling channel is defined inside the side wall of the bucket body. A coolant inlet and a coolant outlet are provided on the outer periphery of the side wall of the bucket body, and the coolant inlet and the coolant outlet are respectively communicated with the cooling channel.

[0022] In some embodiments, a spoiler column array is arranged in the cooling channel.

[0023] In some embodiments, the first driving unit is further used to drive the impeller shaft to rotate in the reverse direction.

[0024] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0026] Figure 1 is a schematic diagram of a proton exchange membrane fuel cell catalyst slurry dispersion device according to an embodiment of the present invention.

[0027] Figure 2 is an assembly schematic diagram of a dispersion stirring system in a proton exchange membrane fuel cell catalyst slurry dispersion device according to an embodiment of the present invention. The first driving unit and the second driving unit of the dispersion stirring system are not shown in this schematic diagram.

[0028] Figure 3 is an exploded schematic diagram of a dispersion stirring system in a proton exchange membrane fuel cell catalyst slurry dispersion device according to an embodiment of the present invention. The first driving unit and the second driving unit of the dispersion stirring system are not shown in this schematic diagram.

[0029] Figure 4 is Figure 2 a schematic cross-sectional view taken along line A-A of

[0030] Figure 5 is Figure 4 An enlarged schematic view of position I in [the figure].

[0031] Figure 6 It is a schematic view of the blade in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0032] Figure 7 is Figure 6 A sectional schematic view at B-B in [the figure].

[0033] Figure 8 It is an exploded schematic view of the blade in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0034] Figure 9 It is a schematic view of the barrel body in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0035] Figure 10 It is a sectional schematic view of the barrel body in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0036] Figure 11 It is an exploded schematic view of the barrel body in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0037] Figure 12 It is a schematic view of another blade in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0038] Figure 13 It is a schematic view of yet another blade in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0039] Figure 14 It is a schematic view of still another blade in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0040] Figure 15 It is a schematic view of yet another blade in the catalyst slurry dispersion device of the proton exchange membrane fuel cell according to the embodiment of the present invention.

[0041] Reference numerals:

[0042] Proton exchange membrane fuel cell catalyst slurry dispersion device 1000

[0043] Liquid storage bucket 1; bucket body 101; discharge structure 1011; discharge port 10111; discharge valve 10112; cooling channel 1012; turbulence post array 1013; housing 1014; coolant inlet 1015; coolant outlet 1016; bucket cover 102; feeding structure 1021; feeding port 10211; feeding valve 10212;

[0044] Stirring and dispersing system 2; high-speed flow channel structure 201; second positioning hole 201b; high-speed flow channel 2011; gap 2012; second positioning hole 201b; high-shear flow channel 2013; high-speed impeller structure 202; impeller shaft 2021; blade 2022; top cover 2023; first driving unit 203; stirring paddle structure 204; transmission shaft 2041; first positioning hole 2041a; paddle blade 2042; vertical beam 20421; cross beam 20422; first positioning pin 20422a; second positioning pin 20422b; turbulence block 20423; outer shell 20425; half outer shell 204251; capillary core 20426; second driving unit 205. Specific embodiments

[0045] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0046] The following will be combined with Figures 1 to 11 Describe the proton exchange membrane fuel cell catalyst slurry dispersion device 1000 according to the embodiments of the present invention.

[0047] As Figures 1 to 11 shown, the proton exchange membrane fuel cell catalyst slurry dispersion device 1000 according to the embodiments of the present invention includes a liquid storage bucket 1 and a stirring and dispersing system 2.

[0048] Among them, the liquid storage bucket 1 is used to store the slurry, and here the slurry refers to the proton exchange membrane fuel cell catalyst slurry.

[0049] The stirring and dispersing system 2 includes a high-speed flow channel structure 201, a high-speed impeller structure 202, and a first driving unit 203. The high-speed flow channel structure 201 is disposed within the liquid storage bucket 1, meaning that the high-speed flow channel structure 201 is completely located within the liquid storage bucket 1 and does not contact the liquid storage bucket 1; the high-speed flow channel structure 201 has a vertically penetrating cavity. The high-speed impeller structure 202 includes an impeller shaft 2021, blades 2022, and a top cover 2023; the impeller shaft 2021 is vertically disposed within the cavity, the upper end of the impeller shaft 2021 extends out of the liquid storage bucket 1 and is connected to the first driving unit 203, and the first driving unit 203 can be a first motor for driving the impeller shaft 2021 to rotate forward to drive the blades 2022 to rotate at a high speed; a high-speed flow channel 2011 (refer to Figure 4 ) with a radially decreasing cross-section from bottom to top is formed between the impeller shaft 2021 and the wall of the cavity; the blades 2022 are fixed to the impeller shaft 2021 and are located at the lower end of the cavity; the top cover 2023 is fixed to the impeller shaft 2021 and is located above the top end of the high-speed flow channel structure 201, and there is a radially penetrating gap 2012 between the top cover 2023 and the top end face of the high-speed flow channel structure 201.

[0050] When the proton exchange membrane fuel cell catalyst slurry dispersing device 1000 of the embodiment of the present invention is in use, the slurry is placed in the liquid storage bucket 1, the first driving unit 203 drives the impeller shaft 2021 to rotate forward, driving the blades 2022 to rotate at a high speed. The high-speed rotating blades 2022 push the slurry at the bottom of the liquid storage bucket 1 near the impeller shaft 2021 to flow upward from the bottom end of the high-speed flow channel 2011 at a relatively high speed, thereby causing the slurry around the liquid storage bucket 1 to flow downward. Since the radial cross-section of the high-speed flow channel 2011 gradually decreases from bottom to top, the slurry in the high-speed flow channel 2011 can be accelerated, that is, when the high-speed flow channel structure 201 and the high-speed impeller structure 202 cooperate with each other, the slurry in the high-speed flow channel 2011 can be accelerated to flow upward at a higher speed. When the slurry in the high-speed flow channel 2011 flows to the top end of the high-speed flow channel 2011, it is blocked by the lower surface of the top cover 2023, and the flow direction deflects radially and flows out from the gap 2012 between the top cover 2023 and the top end face of the high-speed flow channel structure 201, and then tends to continue to flow radially at a high speed for a certain distance. The above process improves the flow circulation intensity in the vertical section within the liquid storage bucket 1, thereby promoting the mixing of slurry components at different depths and improving the dispersion effect. At the same time, through this circulating flow, the slurry in the high-temperature regions near the side wall and bottom surface of the liquid storage bucket is convectively circulated to other regions, suppressing the range of local high-temperature regions, making the temperature distribution inside the liquid storage bucket 1 more uniform, and suppressing the agglomeration phenomenon of catalyst particles caused by high temperature.

[0051] In addition, since the blades 2022 rotating at high speed push the slurry to flow upward from the bottom of the liquid storage bucket 1 along the high-speed flow channel 2011, the bubbles that may exist are driven to move upward. As the bubbles float upward, the depth decreases and the pressure drops, causing the bubbles to continuously expand. As the cross-sectional area of the high-speed flow channel 2011 gradually decreases, the slurry will accelerate, resulting in a further decrease in pressure, prompting the bubbles to further expand and increase in volume, enabling the bubbles to be subject to a greater buoyancy force and further accelerating their upward floating, thereby reducing the number of bubbles aggregated inside the slurry. The bubbles with an increased volume have poor stability and are more likely to burst. Therefore, when the cross-sectional area of the high-speed flow channel gradually decreases, the large bubbles with a further expanded volume burst partially inside the slurry, and the unburst bubbles with a further expanded volume tend to flow out from the gap 2012 when the slurry flows radially at high speed from the gap 2012, and flow out towards the lower surface of the top cover 2023, floating on the slurry liquid surface, and can become unstable and burst more quickly under the disturbance of the outside world.

[0052] The proton exchange membrane fuel cell catalyst slurry dispersion device 1000 according to the embodiment of the present invention has the following advantages: Through the cooperation of the high-speed impeller structure 202 and the high-speed flow channel structure 201, the convection circulation of the slurry in the vertical plane is strengthened, the mixing and stirring of the slurry components are enhanced, the range of local high-temperature regions is inhibited, the degree of particle agglomeration is weakened, and at the same time, the bubbles can be effectively promoted to burst.

[0053] In some embodiments, as Figure 3 shown, a plurality of high-shear flow channels 2013 are spacedly distributed at the top end of the high-speed flow channel structure 201. In this way, the slurry in the high-speed flow channel 2011 flows out at high speed from the high-shear flow channels 2013, promoting the dispersion of the slurry components, and the unburst bubbles that may be doped in the slurry tend to flow out from the gap 2012 and float on the slurry liquid surface, and become unstable and burst more quickly under the disturbance of the outside world.

[0054] In some embodiments, the gap 2012 extends obliquely upward from the inside to the outside in the radial direction. In this way, the slurry in the high-speed flow channel 2011 flows out at high speed from the high-shear flow channels 2013, promoting the dispersion of the slurry components, and the unburst bubbles that may be doped in the slurry tend to flow out along the obliquely upward direction from the gap 2012 and float on the slurry liquid surface, and can become unstable and burst more quickly under the disturbance of the outside world.

[0055] In some embodiments, the top end face of the high-speed flow channel structure 201 is parallel to the lower surface of the flow channel top cover 2023. In this way, on the one hand, it enables the top cover 2023 and the high-speed flow channel structure 201 to rotate freely relative to each other without interference, and on the other hand, it makes the spacing at different positions of the gap 2012 the same, which is beneficial to the slurry in the high-speed flow channel 2011 flowing out evenly in the circumferential direction.

[0056] In some embodiments, the impeller shaft 2021 is a hollow shaft, that is, the impeller shaft 2021 has a through central shaft hole; the stirring and dispersing system 2 further includes a stirring paddle structure 204 and a second driving unit 205; the stirring paddle structure 204 includes a transmission shaft 2041 and paddle blades 2042. The transmission shaft 2041 is coaxially arranged in the impeller shaft 2021, that is, coaxially arranged with the impeller shaft 2021 in the central shaft hole of the impeller shaft 2021, and the transmission shaft 2041 and the impeller shaft 2021 can rotate freely respectively. The upper end and the lower end of the transmission shaft 2041 respectively extend out of the upper end and the lower end of the impeller shaft 2021. The upper end of the transmission shaft 2041 is connected to the second driving unit 205. The second driving unit 205 can be a second motor for driving the transmission shaft 2041 to rotate at a low speed. The paddle blades 2042 are arranged outside the high-speed flow channel structure 201, and the paddle blades 2042 are respectively fixed to the lower end of the transmission shaft 2041 and the high-speed flow channel structure 201. It can be understood that the second driving unit 205 drives the transmission shaft 2041 to rotate at a low speed, and then drives the paddle blades 2042 and the high-speed flow channel structure 201 to rotate synchronously at a low speed, stirring and dispersing the slurry in the liquid storage bucket 1 and located outside the high-speed flow channel structure 201.

[0057] It should be noted that one or more paddle blades 2042 can be provided according to actual needs. For example, referring to Figure 2 and Figure 3 as shown, three paddle blades 2042 are provided, and the three paddle blades 2042 are centrally symmetrically distributed with respect to the transmission shaft 2041.

[0058] In some embodiments, as Figure 2 and Figure 3 shown, the paddle blade 2042 includes a vertical beam 20421 and a plurality of cross beams 20422 that are spaced apart vertically. One end of each of the plurality of cross beams 20422 is connected to the vertical beam 20421. The other end of the lowermost cross beam 20422 among the plurality of cross beams 20422 is fixed to the lower end of the transmission shaft 2041, and the other ends of the remaining cross beams 20422 among the plurality of cross beams 20422 are fixed to the high-speed flow channel structure 201. Thus, the high-speed flow channel structure 201 and the paddle blade 2042 structure can rotate synchronously with the transmission shaft 2041.

[0059] In some embodiments, as Figure 3 shown, a first positioning pin 20422a is provided at the other end of the lowermost cross beam 20422 among the plurality of cross beams 20422, and a first positioning hole 2041a is provided at the lower end of the transmission shaft 2041. The first positioning pin 20422a is correspondingly fixed in the first positioning hole 2041a, so that the other end of the lowermost cross beam 20422 among the plurality of cross beams 20422 is conveniently and reliably fixed to the lower end of the transmission shaft 2041.

[0060] The other ends of the remaining crossbeams 20422 among the multiple crossbeams 20422 are provided with second positioning pins 20422b. The outer periphery of the high-speed runner structure 201 is provided with second positioning holes 201b, and the second positioning pins 20422b are correspondingly fixed in the second positioning holes 201b, so that the other ends of the remaining crossbeams 20422 among the multiple crossbeams 20422 are conveniently and reliably fixed to the high-speed runner structure 201.

[0061] In some embodiments, the blade 2042 further includes a spoiler block 20423, and the spoiler block 20423 is arranged on the vertical beam 20421. By arranging the spoiler block 20423, the intensity of the disturbing eddy current in the downstream flow field is enhanced, and the mixing of the slurry components is promoted.

[0062] In some embodiments, there are multiple spoiler blocks 20423, and the multiple spoiler blocks 20423 are arranged at intervals up and down on the vertical beam 20421. By arranging multiple spoiler blocks 20423, the intensity of the disturbing eddy current in the downstream flow field can be better enhanced, and the mixing of the slurry components can be better promoted.

[0063] In some embodiments, the outer shape of the spoiler block 20423 can be a cube (refer to Figure 6 ), a prism (refer to Figure 12 ), a cylinder (refer to Figure 13 ), a pyramid (refer to Figure 14 ), a streamlined blade 2022 (refer to Figure 15 ), etc.

[0064] In some embodiments, the blade 2042 has a heat exchange function. It can be understood that during the stirring process, although the shear action in a local area of the blade 2042 is strong and it is easy to generate a high-temperature area, inducing the agglomeration of slurry particles, due to the heat exchange function of the blade 2042, the upper end of the blade 2042 can be located above the slurry liquid level, and the blade 2042 can transport the heat energy in the local high-temperature area near itself to the upper end of the blade 2042 in contact with the air and transfer it to the outside, thereby reducing the range of the local high-temperature area near the blade 2042 and avoiding the agglomeration of the slurry.

[0065] In some embodiments, such as Figures 4 to 8As shown, the blade 2042 is a heat pipe structure. The blade 2042 includes a housing 20425 and a capillary wick 20426 disposed within the housing 20425. The housing 20425 may include two half-housings 204251, and the two half-housings 204251 are integrally formed respectively. After being fastened together, a chamber is formed, and one or more capillary wicks 20426 can be arranged in the chamber. By selecting appropriate materials and structural dimensions, the heat transfer function is ensured. The part of the blade 2042 immersed in the slurry is the evaporation section, and the upper end of the blade 2042 exposed above the slurry liquid level is the condensation section. The evaporation section of the blade 2042 immersed in the slurry absorbs the heat in the local high-temperature area of the slurry by evaporating the working fluid into a gaseous state. The gaseous working fluid flows upward in the capillary wick 20426 and transfers the heat to the condensation section. The condensation section at the upper end of the blade is exposed to the air with a lower temperature, causing the gaseous working fluid to condense and liquefy and transfer heat to the air. And the capillary wick 20426 has the function of converging the liquefied working fluid inside the condensation section and driving the liquefied working fluid to flow towards the evaporation section inside the slurry.

[0066] In some embodiments, as Figure 1 , Figures 9 to 11 shown, the liquid-containing bucket 1 includes a bucket body 101 and a bucket lid 102. The bucket body 101 is used to hold the slurry. The bucket body 101 has a bucket opening, which facilitates the stirring system to be placed into the bucket body 101. The bucket lid 102 is covered on the bucket opening of the bucket body 101, which can prevent the slurry from splashing out during the stirring process. The bucket lid 102 is provided with an opening for the impeller shaft 2021 to pass through, which facilitates the upper end of the impeller shaft 2021 to extend out of the liquid-containing bucket 1. The bucket lid 102 is provided with a feeding structure 1021. The feeding structure 1021 includes a feeding port 10211 and a feeding valve 10212 arranged on the feeding port 10211. Before the dispersion stirring starts, the feeding valve 10212 is opened, and each component can be put into the liquid-containing bucket from the feeding port 10211. The bottom of the bucket body 101 is provided with a discharging structure 1011. The discharging structure 1011 includes a discharging port 10111 and a discharging valve 10112 arranged on the discharging port 10111. After the dispersion stirring is completed, the discharging valve 10112 is opened, and the slurry in the liquid-containing bucket can be discharged from the discharging port 10111.

[0067] In some embodiments, a cooling channel 1012 is defined within the side wall of the bucket body 101. A coolant inlet 1015 and a coolant outlet 1016 are provided on the outer periphery of the side wall of the bucket body 101. The coolant inlet 1015 and the coolant outlet 1016 are respectively communicated with the cooling channel 1012. In this way, the coolant enters the cooling channel 1012 from the coolant inlet 1015 and then flows out from the coolant outlet 1016, and the temperature of the slurry during the stirring process is reduced by the circulating flow of the coolant.

[0068] In some embodiments, a turbulator array 1013 is arranged in the cooling channel 1012, which can enhance the perturbation of the cooling water flow, inhibit the range of the dead zone, and at the same time induce the flow to transition to a turbulent state, thereby improving the heat transfer capacity and heat transfer effect.

[0069] In some embodiments, such as Figures 10 to 11 shown, the barrel body 101 is mainly composed of a double-layer housing 1014. Among them, a turbulator array 1013 is provided on the outer surface of the side wall of the inner-layer housing 1014. The turbulator array 1013 is in contact with the inner surface of the side wall of the outer-layer housing 1014. There is an interlayer space between the side walls of the double-layer housing 1014, and this interlayer space is the cooling channel 1012.

[0070] In some embodiments, the first driving unit 203 is further configured to drive the impeller shaft 2021 to rotate in the reverse direction. On the one hand, after the dispersion stirring is completed and the slurry needs to be discharged from the liquid storage barrel 1, the first driving unit 203 drives the impeller shaft 2021 to rotate in the reverse direction, driving the blades 2022 to rotate in the reverse direction, thereby pushing the slurry to flow downward and accelerating the slurry discharge process; on the other hand, when cleaning the proton exchange membrane fuel cell catalyst slurry dispersion device 1000, after putting the cleaning liquid into the liquid storage barrel 1, the second driving unit 205 can be used to drive the stirring paddle structure 204 to rotate, and the first driving unit 203 drives the high-speed impeller structure 202 to rotate in the reverse direction, so that the cleaning liquid flows downward in the high-speed flow channel 2011 to impact the blades 2022, the stirring paddle and the bottom of the liquid storage barrel 1 and other parts that are not easy to clean, improving the convenience of equipment cleaning.

[0071] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0072] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A catalyst slurry dispersion device for a proton exchange membrane fuel cell, characterized in that Comprising: A liquid storage bucket for storing slurry; A stirring and dispersing system, which includes a high-speed flow channel structure, a high-speed impeller structure, and a first driving unit; the high-speed flow channel structure is arranged inside the liquid storage bucket, and the high-speed flow channel structure has a vertically penetrating cavity; the high-speed impeller structure includes an impeller shaft, blades, and a top cover; the impeller shaft is vertically arranged in the cavity, the upper end of the impeller shaft extends out of the liquid storage bucket and is connected to the first driving unit, and the first driving unit is used to drive the impeller shaft to rotate forward; a high-speed flow channel with a gradually decreasing radial cross-section from bottom to top is formed between the impeller shaft and the wall of the cavity; the blades are fixed on the impeller shaft and are located at the lower end of the cavity; the top cover is fixed on the impeller shaft and is located above the top end of the high-speed flow channel structure, and there is a radially penetrating gap between the top cover and the top end face of the high-speed flow channel structure.

2. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 1, characterized in that, A plurality of high-shear flow channels are distributed at intervals at the top end of the high-speed flow channel structure.

3. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 2, characterized in that, The gap extends obliquely upward from inside to outside in the radial direction.

4. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 1, wherein The top end face of the high-speed flow channel structure and the lower surface of the top cover are parallel.

5. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 1, characterized in that, The impeller shaft is a hollow shaft; the stirring and dispersing system further includes a stirring paddle structure and a second driving unit; the stirring paddle structure includes a transmission shaft and paddle blades, the transmission shaft is coaxially arranged inside the impeller shaft, the upper end and the lower end of the transmission shaft respectively extend out of the upper end and the lower end of the impeller shaft, the upper end of the transmission shaft is connected to the second driving unit, the paddle blades are arranged outside the high-speed flow channel structure, and the paddle blades are respectively fixed to the transmission shaft and the high-speed flow channel structure.

6. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 5, characterized in that, The paddle blades include vertical beams and a plurality of cross beams distributed at intervals up and down. One end of each of the plurality of cross beams is connected to the vertical beam, the other end of the lowermost cross beam among the plurality of cross beams is fixed to the lower end of the transmission shaft, and the other ends of the remaining cross beams among the plurality of cross beams are fixed to the high-speed flow channel structure.

7. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 6, characterized in that, The paddle blades further include flow disturbing blocks arranged on the vertical beams.

8. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 7, characterized in that, There are a plurality of the flow disturbing blocks, and the plurality of flow disturbing blocks are distributed at intervals up and down on the vertical beams.

9. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 5, characterized in that, The paddle blades have a heat exchange function.

10. The proton exchange membrane fuel cell catalyst slurry dispersion device according to any one of claims 1-9, characterized in that, The liquid storage bucket includes a bucket body and a bucket cover. The bucket cover covers the bucket opening of the bucket body. An opening for the impeller shaft to pass through is provided on the bucket cover, and a feeding structure is provided on the bucket cover; a discharging structure is provided at the bottom of the bucket body.

11. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 10, wherein A cooling channel is defined inside the side wall of the bucket body, and a coolant inlet and a coolant outlet are provided on the outer periphery of the side wall of the bucket body. The coolant inlet and the coolant outlet are respectively communicated with the cooling channel.

12. The proton exchange membrane fuel cell catalyst slurry dispersion device according to claim 11, characterized in that, A flow disturbing column array is arranged in the cooling channel.

13. The proton exchange membrane fuel cell catalyst slurry dispersion device according to any one of claims 1-9, characterized in that, The first driving unit is further used to drive the impeller shaft to rotate in the reverse direction.

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