CN220099218U - Novel anode plate composite flow field structure for PEM (proton exchange membrane) electrolytic tank - Google Patents
Novel anode plate composite flow field structure for PEM (proton exchange membrane) electrolytic tank Download PDFInfo
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- CN220099218U CN220099218U CN202321491992.3U CN202321491992U CN220099218U CN 220099218 U CN220099218 U CN 220099218U CN 202321491992 U CN202321491992 U CN 202321491992U CN 220099218 U CN220099218 U CN 220099218U
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- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 239000012528 membrane Substances 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 27
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 4
- 239000007789 gas Substances 0.000 abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000001257 hydrogen Substances 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000000376 reactant Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model provides a novel anode plate composite flow field structure for a PEM (proton exchange membrane) electrolytic tank, which relates to the field of PEM electrolytic water hydrogen production, and comprises a water inlet, a water vapor outlet, a punctiform flow equalizing cylinder group and a composite flow field flow channel communicated with the water inlet and the water vapor outlet, wherein the composite flow field flow channel comprises a parallel flow channel and a snake-shaped flow channel, and the punctiform flow equalizing cylinder group is arranged between the water inlet and the composite flow field flow channel and between the water vapor outlet and the composite flow field flow channel; the parallel flow channels can ensure that the whole flow field keeps lower pressure drop in the running process of the electrolytic tank, the serpentine flow channels can effectively solve the problem of gas blockage in the flow field, effectively prolong the residence time of fluid in the anode plate, promote the diffusion capacity of the fluid to the diffusion layer, strengthen mass transfer and heat transfer, improve the reaction rate of the anode side and further improve the performance of the PEM electrolytic tank.
Description
Technical Field
The utility model belongs to the field of hydrogen production by water electrolysis of PEM, and particularly relates to a novel anode plate composite flow field structure for a PEM electrolytic tank.
Background
The hydrogen energy has the advantages of zero pollution, high heat value, wide storability and application and the like, the fluctuation of energy sources can be solved by the hydrogen production by the electrolysis of water, the hydrogen production is a key technical means for realizing the rebalancing of the energy sources in a longer time and wider space, the large-scale and efficient renewable energy source absorption can be realized, the energy redistribution in different industries and regions can be realized, and the toughness of an energy source system can be improved.
Compared with the existing ALK technology, the proton exchange membrane is utilized to replace the asbestos membrane in the PEM electrolytic cell, and the PEM electrolytic cell has higher flexibility and reactivity in operation. This significantly increased operational flexibility may increase the overall economic benefits of electrolytic hydrogen production, especially in combination with renewable energy generation, such that revenue may be derived from multiple power markets because PEM technology provides a wider operating range and shorter response times.
The bipolar plate is used as an important component of a PEM electrolytic cell and has the functions of transmitting reactants and products, collecting current, supporting membrane electrodes, separating reactants, transferring heat and the like. The arrangement of the flow channels directly affects the uniform distribution of the reactants and the efficient transport of the gas. The ideal flow field structure has the following characteristics: uniform distribution of reactants, efficient mass transfer of reactants to the Catalyst Layer (CL), discharge of reaction products from the flow channels to the outside of the flow channels, low pressure drop and efficient thermal management. Common flow field structures include parallel flow fields, serpentine flow fields, spiral flow fields, cascade flow fields, and the like. The parallel flow field has small pressure drop, is easy to cause gas blockage and has poor fluidity; the serpentine flow field fluid channel has long distance and large pressure drop, and is easy to convey fluid; the spiral flow field may observe non-uniformity at the channels due to stagnation of water and reduction of flow rate.
In summary, developing a novel efficient anode plate composite flow field structure has a crucial influence on the performance and service life of the electrolytic tank.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a novel anode plate composite flow field structure for a PEM electrolytic cell, which ensures low pressure drop, and simultaneously ensures that a fluid path is long through the structural advantages of a serpentine flow channel, on one hand, the pressure drop is increased, bubbles generated by reaction are brought out, so that the fluid distribution is uniform, on the other hand, the fluid residence time is increased, the effective mass transfer of reactants to a catalytic layer is increased, the electrolytic performance of the electrolytic cell is improved, and the product yield is improved.
In order to achieve the above object, the present utility model is realized by the following technical scheme: the utility model provides a novel anode plate composite flow field structure for PEM electrolysis trough, composite flow field structure sets up on the anode plate body, including water inlet, aqueous vapor export, punctiform flow equalizing cylinder crowd and intercommunication the water inlet with the composite flow field runner of aqueous vapor export, composite flow field runner includes parallel runner and snakelike runner, the water inlet with between the composite flow field runner and aqueous vapor export with between the composite flow field runner all set up punctiform flow equalizing cylinder crowd.
Further, the parallel flow channels are positioned at the upper part of the anode plate body and the lower part of the anode plate body, and the serpentine flow channels are positioned at the middle part of the anode plate body.
Further, the parallel flow channels at the upper part of the anode plate body, the serpentine flow channels at the middle part of the anode plate body and the parallel flow channels at the lower part of the anode plate body respectively occupy one third of the composite flow field flow channels.
Further, the parallel flow channel is formed by more than two parallel flow channel ridges which are arranged in parallel, one parallel flow channel ridge comprises more than two parallel flow channel ridge units which are arranged at intervals horizontally, and the interval between two adjacent parallel flow channel ridge units on one parallel flow channel ridge is a through hole.
Further, the through holes in the parallel flow channels are distributed in a staggered mode, and the lengths of the through holes are 3mm-5mm.
Further, the serpentine flow channel is formed by more than two serpentine flow channel ridges.
Further, the widths of the parallel runner ridge units and the serpentine runner ridge units are 1mm-2mm, and the heights are 1.0mm-2.0mm.
Further, the point-like flow equalizing cylinder group comprises a plurality of cylinder blocks, the diameter of each cylinder block is 1-1.5mm, the height of each cylinder block is 1.0-2.0 mm, and the cylinder blocks are distributed in a staggered mode at an angle of 60-80 degrees.
Further, the ends of the composite flow field structure for turning the fluid are designed as round chamfers, and the radius of the round chamfers is 0.5mm-3mm.
The beneficial effects are that:
(1) In the novel anode plate composite flow field structure for the PEM electrolytic tank, parallel flow channels are adopted in the upper part and the lower part of the flow channels within 1/3 range respectively, so that the whole flow field is ensured to keep lower pressure drop in the operation process of the electrolytic tank, and in the process of selecting the electrolytic tank system equipment, equipment such as pumps with smaller lift can be selected, and the system equipment type selecting cost is reduced;
(2) In the novel anode plate composite flow field structure for the PEM electrolytic tank, the serpentine flow channel is adopted within the range of 1/3 of the middle part of the composite flow field flow channel, so that on one hand, the pressure drop is increased, bubbles generated by the reaction are carried out, the fluid is uniformly distributed, and the heat and mass transfer are more effective; on the other hand, the residence time of the fluid in the flow channel is increased, the contact reaction time of the fluid passing through the diffusion layer and the catalytic layer is effectively increased, the reaction rate is increased, and the performance of the electrolytic cell is improved;
(3) In the novel anode plate composite flow field structure for the PEM electrolytic tank, the inlet and the outlet adopt the point-like flow equalizing cylinder groups, so that fluid forms turbulent flow in the anode plate, and the fluid inside the anode plate is distributed more uniformly; moreover, the punctiform cylinder group part has larger fluid area, so that the contact area of the fluid passing through the diffusion layer and the catalyst layer can be increased, and the reaction is more complete; the punctiform flow equalization cylinder group can also balance the pressure distribution of the flow passage in the anode plate, and the wettability of the PEM electrolytic water film electrode is improved;
(4) In the novel anode plate composite flow field structure for the PEM electrolytic tank, the end part of the fluid is turned to be smooth and round, so that the pressure loss caused by corners can be reduced, the dead zone of the fluid can be reduced, the utilization rate of the fluid can be improved, and the overall efficiency of the PEM electrolytic tank can be increased;
(5) In the novel anode plate composite flow field structure for the PEM electrolytic tank, the through holes between the two adjacent parallel runner ridge units can effectively balance the pressure and the speed between runners, and the wettability of the membrane electrode of the PEM electrolytic tank is improved.
The conception, specific structure, and technical effects of the present utility model will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present utility model.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
reference numerals: 1. a water inlet; 2. a punctiform flow equalizing cylinder group; 3. parallel flow channels; 4. serpentine flow channels; 5. a water gas outlet; 6. a parallel flow channel ridge unit; 7. a through hole; 8. and (5) chamfering.
Detailed Description
The utility model is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present utility model, and such equivalents are intended to fall within the scope of the utility model as defined in the appended claims.
In the drawings, like structural elements are referred to by like reference numerals and components having similar structure or function are referred to by like reference numerals. The dimensions and thickness of each component shown in the drawings are arbitrarily shown, and the present utility model is not limited to the dimensions and thickness of each component. The thickness of the components is exaggerated in some places in the drawings for clarity of illustration.
As shown in fig. 1, the utility model provides a novel anode plate composite flow field structure for a PEM electrolytic tank, the composite flow field structure is arranged on an anode plate body and comprises a water inlet 1, a water vapor outlet 5, a punctiform flow equalizing cylinder group 2 and a composite flow field flow channel communicated with the water inlet 1 and the water vapor outlet 5, wherein the water inlet 1 is positioned at the left upper corner of the anode plate, the water vapor outlet 5 is positioned at the right lower corner of the anode plate, the composite flow field flow channel comprises a parallel flow channel 3 and a serpentine flow channel 4, and the punctiform flow equalizing cylinder group 2 is arranged between the water inlet 1 and the composite flow field flow channel and between the water vapor outlet 5 and the composite flow field flow channel.
The parallel runner 3 is positioned at the upper part of the anode plate body and the lower part of the anode plate body, and the serpentine runner 4 is positioned at the middle part of the anode plate body; the parallel flow channel 3 positioned at the upper part of the anode plate body, the serpentine flow channel 4 positioned at the middle part of the anode plate body and the parallel flow channel 3 positioned at the lower part of the anode plate body respectively occupy one third of the composite flow field flow channel.
The parallel flow channel 3 is formed by more than two parallel flow channel ridges which are arranged in parallel, one parallel flow channel ridge comprises more than two parallel flow channel ridge units 6 which are arranged at intervals horizontally, and the interval between two adjacent parallel flow channel ridge units 6 on one parallel flow channel ridge is a through hole 7; the through holes 7 in the parallel flow channels 3 are distributed in a staggered manner, and the length of the through holes 7 is 4mm.
The serpentine flow channel 4 is formed by two or more serpentine flow channel ridges.
The width of the parallel runner ridge unit 6 and the serpentine runner ridge is lmm, and the height is 2.0mm.
The punctiform flow equalizing cylinder group 2 comprises a plurality of cylinder blocks, the diameter of the cylinder blocks is 1.5mm, the height is 2.0mm, and the cylinder blocks are distributed in a staggered way at 60 degrees.
The ends of the composite flow field structure for turning the fluid are designed into round chamfers 8, and the radius of each round chamfer 8 is 2mm.
The pure water with certain quantity meeting the quality requirement enters the anode plate through the water inlet 1, the pure water entering through the water inlet 1 is firstly uniformly distributed by turbulent flow of the fluid through the punctiform flow equalizing cylinder group 2 at the water inlet, then enters the parallel flow channel 3 and the serpentine flow channel 4 with the groove structure, the fluid is further distributed into the flow channel, the through holes 7 between the parallel flow channel ridge units 6 are used for balancing the pressure and the flow speed of the fluid inside the anode plate, the fluid flows through the flow channel, then is converged by the punctiform flow equalizing cylinder group 2 at the water-gas outlet 5, finally is discharged through the water-gas outlet 5, and the generated heat and gas products are carried out along with the flow of the fluid from the water inlet 1 to the water-gas outlet 5 along with the progress of the reaction, and smooth round chamfer angles 8 are arranged at the end parts of the anode plate, which make the fluid turn around, so that the dead zone of the fluid inside the anode plate is reduced.
Finally, it should be noted that: the present utility model is not limited to the above embodiments, and all equivalent structures or equivalent processes using the contents of the specification and drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the protection scope of the present utility model.
Claims (9)
1. The utility model provides a novel anode plate composite flow field structure for PEM electrolysis trough, its characterized in that, composite flow field structure sets up on the anode plate body, including water inlet (1), aqueous vapor export (5), punctiform flow equalizing cylinder crowd (2) and intercommunication water inlet (1) with the compound flow field runner of aqueous vapor export (5), compound flow field runner includes parallel runner (3) and serpentine runner (4), water inlet (1) with between the compound flow field runner and aqueous vapor export (5) with all set up between the compound flow field runner punctiform flow equalizing cylinder crowd (2).
2. A novel anode plate composite flow field structure for a PEM electrolyzer of claim 1 wherein said parallel flow channels (3) are located in the upper portion of said anode plate body and the lower portion of said anode plate body, and said serpentine flow channel (4) is located in the middle portion of said anode plate body.
3. A new anode plate composite flow field structure for a PEM electrolyser as claimed in claim 2 wherein said parallel flow channels (3) in the upper portion of said anode plate body, said serpentine flow channels (4) in the middle portion of said anode plate body and said parallel flow channels (3) in the lower portion of said anode plate body each occupy one third of said composite flow field flow channels, respectively.
4. A novel anode plate composite flow field structure for a PEM electrolyser as claimed in claim 2 or 3 wherein said parallel flow channels (3) are formed by more than two parallel flow channel ridges arranged in parallel, one of said parallel flow channel ridges comprising more than two parallel flow channel ridge units (6) arranged at horizontal intervals, the spacing between adjacent two of said parallel flow channel ridge units (6) on one of said parallel flow channel ridges being a through opening (7).
5. A novel anode plate composite flow field structure for a PEM electrolyser as claimed in claim 4 wherein said through openings (7) in said parallel flow channels (3) are staggered, said through openings (7) having a length of 3mm to 5mm.
6. A novel anode plate composite flow field structure for a PEM electrolyser as claimed in claim 4 wherein said serpentine flow channels (4) are formed of more than two serpentine flow channel ridges.
7. The novel anode plate composite flow field structure for a PEM electrolyzer of claim 6 wherein said parallel flow channel ridge elements (6) and said serpentine flow channel ridges are each 1mm-2mm in width and 1.0mm-2.0mm in height.
8. The novel anode plate composite flow field structure for a PEM (proton exchange membrane) electrolytic tank according to claim 1, wherein the punctiform flow equalization cylinder group (2) comprises a plurality of cylinder blocks, the diameter of the cylinder blocks is 1-1.5mm, the height of the cylinder blocks is 1.0-2.0 mm, and the cylinder blocks are staggered at 60-80 degrees.
9. A new anode plate composite flow field structure for a PEM electrolyser as claimed in claim 1 wherein the fluid diverting ends of the composite flow field structure are each designed as a rounded chamfer (8), said rounded chamfer (8) having a radius of 0.5mm to 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321491992.3U CN220099218U (en) | 2023-06-12 | 2023-06-12 | Novel anode plate composite flow field structure for PEM (proton exchange membrane) electrolytic tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321491992.3U CN220099218U (en) | 2023-06-12 | 2023-06-12 | Novel anode plate composite flow field structure for PEM (proton exchange membrane) electrolytic tank |
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| Publication Number | Publication Date |
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| CN220099218U true CN220099218U (en) | 2023-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321491992.3U Active CN220099218U (en) | 2023-06-12 | 2023-06-12 | Novel anode plate composite flow field structure for PEM (proton exchange membrane) electrolytic tank |
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| Country | Link |
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| CN (1) | CN220099218U (en) |
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2023
- 2023-06-12 CN CN202321491992.3U patent/CN220099218U/en active Active
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