CN114703494B - Anode plate of PEM water electrolytic tank - Google Patents
Anode plate of PEM water electrolytic tank Download PDFInfo
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- CN114703494B CN114703494B CN202210343911.9A CN202210343911A CN114703494B CN 114703494 B CN114703494 B CN 114703494B CN 202210343911 A CN202210343911 A CN 202210343911A CN 114703494 B CN114703494 B CN 114703494B
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- flow channel
- anode plate
- wedge
- protruding parts
- flow passage
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 abstract description 25
- 238000005868 electrolysis reaction Methods 0.000 abstract description 19
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 206010001526 Air embolism Diseases 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002010 green coke Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application relates to the field of electrolysis, and particularly discloses an anode plate of a PEM water electrolysis tank, which comprises a plurality of protruding parts connected to one side of the plate, wherein anode flow passages are formed between the protruding parts, the plate is provided with an outlet flow passage and an inlet flow passage, and the outlet flow passage and the inlet flow passage are communicated with the anode flow passage. The diffusion capacity of the reaction water is ensured, the transmission efficiency of the reaction water is improved, and the reaction water is uniformly distributed in the flow field, so that the effective reaction area is increased, and the electrolysis performance is improved.
Description
Technical Field
The application relates to the technical field of electrolysis, in particular to an anode plate of a PEM water electrolysis cell.
Background
With the continuous development of world energy technology, hydrogen energy is expected by people worldwide by virtue of high efficiency and low pollution. The technology of hydrogen production by Proton Exchange Membrane (PEM) water electrolysis is currently green coke for hydrogen productionDot technology. The reaction principle is the reverse reaction of PEM fuel cell reaction, proton membrane is used as electrolyte, pure water level reactant is decomposed into O at anode 2 Proton H-and electron e - Protons H - Through PEM to the cathode, on the cathode side with electrons e - Combine into H 2 . The purity of the generated hydrogen is high, the pressure regulation range is large, the output pressure of the hydrogen can reach several megapascals, and the method is suitable for the rapid-change renewable energy power input. PEM water electrolysis hydrogen production is therefore an efficient path for future renewable energy storage.
There are many technical difficulties in PEM water electrolysis at present, in which bipolar plate and flow field structural design is one of the limiting factors affecting the gas production rate of the electrolyzer. The problem of limiting gas-liquid two-phase transmission is closely related to the gas yield of the electrolytic tank, so that designing an anode plate flow field structure with high-efficiency mass transfer is one of key technologies for improving the gas yield of the electrolytic tank.
Disclosure of Invention
The application aims to solve the problems, and provides an anode plate of a PEM water electrolysis cell, which can ensure the diffusion capacity of reaction water during water electrolysis, improve the transmission efficiency of the reaction water, and ensure that the reaction water is uniformly distributed in a flow field, thereby improving the effective reaction area and the electrolysis performance.
The application adopts the following technical scheme:
an anode plate of a PEM water electrolyzer comprises an anode plate, a plurality of protruding parts connected to one side of the plate, an anode runner formed between the protruding parts, an outlet runner and an inlet runner arranged on the plate, wherein the outlet runner and the inlet runner are communicated with the anode runner.
Further, the convex parts of the anode flow channels are airfoil surfaces and are arranged in a matrix, and a flow dividing structure, a flow guiding structure and a flow converging structure are arranged;
further, the flow dividing structure is provided with wedge-shaped sharp corners which are symmetrically arranged along the axial direction of the incoming flow, and the wedge-shaped sharp corners are 60-90 degrees;
further, the drainage structure is connected with the diversion structure and is in a convex circular arc shape, and the radian is 100-120 degrees;
further, the converging structure is used for receiving the drainage structure and is in a wedge-shaped sharp angle which is arranged symmetrically along the axial direction of the incoming flow and is 30-45 degrees;
further, the outermost axial position of the drainage structures should be at the front end of the distal axial position of the adjacent lobe confluence structures.
In summary, the application at least comprises the following beneficial technical effects:
1. the wedge-shaped sharp-corner-shaped flow distribution structure efficiently disperses fluid, avoids the loss of flow velocity and pressure intensity, improves the uniformity of fluid distribution, increases the effective reaction area and improves the electrolysis efficiency.
2. The convex arc-shaped drainage structure reduces the occurrence of the motion states of blocking the inflow and the discharge of fluid, such as stirring flow, vortex flow and the like, reduces the formation of gas embolism and ensures the smooth flow of reaction water.
3. The wedge-shaped sharp-angle converging structure enables fluid to be smoothly converged, avoids energy loss caused by collision, and ensures efficient transmission of gas phase and liquid phase in the flow channel.
4. The back fluid inlet/outlet mode is adopted, the continuity of a sealing area is ensured, and the tightness of the electrolytic tank is improved.
Drawings
FIG. 1 is a schematic diagram of an elevation view of an anode flow channel of a PEM water electrolyzer in accordance with an embodiment of the present application;
FIG. 2 is a schematic view of a rear view of an anode flow channel according to an embodiment of the present application;
fig. 3 is a schematic structural view of a protrusion according to an embodiment of the present application.
Reference numerals illustrate: 1. an inlet flow passage; 2. an anode flow channel; 3. an outlet flow passage; 4. a water inlet hole 5 and a water outlet hole; 6. a boss; 61. a shunt structure; 62. a drainage structure; 63. and a confluence structure.
Detailed Description
The application is described in further detail below with reference to the drawings and the specific embodiments.
It should be noted that, the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if otherwise specified, are all commercially available; in the description of the present application, the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the illustrated devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
As shown in fig. 1 and 2, the embodiment of the application discloses an anode plate of a PEM water electrolysis cell, which comprises a plate, wherein a plurality of protruding parts 6 are arranged in the plate, an anode runner 2 is formed between the protruding parts 6, the opposite side of the plate to the protruding parts 6 is the back of the plate, and the back of the plate is provided with an outlet runner 3 and an inlet runner 1 which are communicated with the anode runner 2.
The polar plate is equipped with into apopore 4 and apopore 5, and go into apopore 4 and apopore 5 and all run through from the back of polar plate to with anode runner 2 intercommunication, apopore 4 intercommunication anode runner 2 and entry runner 1, apopore 5 intercommunication export runner 3 and entry runner 1. The inlet flow channel 1 and the outlet flow channel 3 can be adjusted according to practical conditions. In this embodiment, the inlet flow channel 1 and the outlet flow channel 3 are symmetrically arranged at two opposite sides of the polar plate, and the direction of the inlet flow channel 1 pointing to the outlet flow channel 3 is the incoming flow direction. When water is electrolyzed, reaction water passes through the water inlet channel 1 at the back of the polar plate, passes through the water inlet hole 4, enters the anode channel 2 at the front of the polar plate, is collected through the water outlet hole 5 after reaction, enters the outlet channel 3 at the back of the polar plate, and flows out of the polar plate.
The bulge part 6 is provided with a flow dividing structure 61, a flow guiding structure 62 and a converging structure 63, the flow dividing structure 61 is in a wedge-shaped sharp angle, and the flow dividing structure 61 is axially and symmetrically arranged along the incoming flow direction, and the wedge-shaped sharp angle of the flow dividing structure 61 in the embodiment is 90 degrees; the drainage structure 62 receives the diversion structure 61 along the incoming flow direction, and is in a convex circular arc shape, and the outermost axial position is at the front end of the axial position of the tail end of the confluence structure 63 of the adjacent bulge part 6, and the radian is 113 degrees in the embodiment; the converging structure 63 is a wedge-shaped sharp corner, receives the drainage structure 62 along the incoming flow direction and is axially symmetrically arranged, and in this embodiment, the wedge-shaped sharp corner of the converging structure 63 is 45 degrees, and under this angle, fluid converging is higher.
As shown in fig. 3, the protruding portions 6 are distributed in multiple rows in the anode plate, the protruding portions 6 in each row of protruding portions 6 are uniformly distributed, two adjacent protruding portions 6 passing through in sequence in the incoming flow direction are respectively a front row of protruding portions 6 and a rear row of protruding portions 6, and the top ends of the flow dividing structures 61 of the rear row of protruding portions 6 extend beyond the outermost positions of the drainage structures 62 of the front row of protruding portions 6 along the reverse direction of the incoming flow direction.
The airfoil matrix runner has three properties of flow dividing, drainage and confluence, can efficiently disperse fluid, avoid the loss of flow velocity and pressure, reduce the occurrence of motion states of blocking fluid inflow and discharge such as stirring flow, reduce the formation of gas embolism, simultaneously ensure smooth confluence of fluid, avoid energy loss caused by collision, ensure the efficient transmission of gas phase and liquid phase in the runner, improve the uniformity of fluid distribution, increase effective reaction area and improve electrolysis efficiency.
The convex parts 6 distributed in an airfoil matrix are provided with a diversion structure 61, a drainage structure 62 and a confluence structure 63. The wedge-shaped sharp corner-shaped flow dividing structure 61 can efficiently disperse fluid, avoid the loss of flow speed and pressure intensity, improve the uniformity of fluid distribution, increase the effective reaction area and improve the electrolysis efficiency. The convex arc-shaped drainage structure 62 receives the diversion structure 61, reduces the occurrence of the motion states of blocking the inflow and the discharge of fluid, such as stirring flow, vortex flow and the like, reduces the formation of gas embolism and ensures the smooth flow of reaction water. The wedge-shaped sharp-corner-shaped converging structure 63 is in homeopathy connection with the drainage structure 62, so that fluid is smoothly converged, energy loss caused by collision is avoided, efficient transmission of gas and liquid phases in the flow channel is ensured, and the comprehensive performance of the electrolytic tank is improved due to the three-aspect comprehensive effect.
The implementation principle of the application is as follows: when water electrolysis is performed, reaction water passes through the water inlet holes 4 to enter the airfoil matrix flow channels on the front surface of the polar plate after being distributed through the inlet flow channel 1 on the top of the flow channel. The flow distribution structure 61 of the airfoil matrix flow channel enables the flowing direction of the reaction water to be changed continuously, promotes the efficient dispersion of the fluid, avoids the loss of flow speed and pressure intensity, is beneficial to the rapid and uniform distribution of the reaction water in the flow field, improves the transmission efficiency of the reaction water, increases the effective reaction area and improves the electrolysis efficiency. When the water electrolysis reaction is carried out, oxygen generated by the anode is continuously diffused into the flow field and is gathered through the formation of bubbles, and when serious, a gas plug is formed at the tail end of the flow channel to block the flow channel, so that the reaction water transmission is affected. The drainage structure 62 of the airfoil matrix flow channel 2 reduces the occurrence of the motion states of blocking the inflow and the discharge of fluid, such as stirring flow, vortex flow and the like, reduces the formation of gas embolism and ensures the smooth flow of reaction water. The converging structure 63 of the airfoil matrix runner 2 is in homeotropic connection with the drainage structure 62, so that fluid is smoothly converged, energy loss caused by collision is avoided, and efficient transmission of gas phase and liquid phase in the runner is ensured, thereby improving electrolysis efficiency.
The above examples are merely illustrative of the preferred embodiments of the present application and are not intended to limit the spirit and scope of the present application. Various modifications and improvements of the technical scheme of the present application will fall within the protection scope of the present application without departing from the design concept of the present application, and the technical content of the present application is fully described in the claims.
Claims (4)
1. A PEM water electrolyzer anode plate characterized by: the novel flow channel comprises a plurality of protruding parts (6) connected into a polar plate, wherein a novel flow channel (2) is formed between the protruding parts (6), the polar plate is provided with an outlet flow channel (3) and an inlet flow channel (1), and the outlet flow channel (3) and the inlet flow channel (1) are communicated with the novel flow channel (2); the convex part (6) is provided with a diversion structure (61), a drainage structure (62) and a converging structure (63), the diversion structure (61) is in a wedge-shaped sharp angle, the wedge-shaped sharp angle of the diversion structure (61) points to the incoming flow direction of the outlet flow passage (3) towards the inlet flow passage (1), the drainage structure (62) receives the diversion structure (61) and is in a convex arc shape, and the converging structure (63) receives the drainage structure (62) and is in a wedge-shaped sharp angle;
the taper angle of the diversion structure (61) is 60-90 degrees;
the radian of the drainage structure (62) is 100-120 degrees;
the wedge-shaped sharp angle of the converging structure (63) is 30-45 degrees;
the protruding parts (6) are arranged in a plurality of rows, the protruding parts (6) of each row are uniformly distributed, and two adjacent rows of protruding parts (6) are arranged in a staggered manner;
two adjacent protruding parts (6) passing through in turn in the incoming flow direction are respectively a front protruding part (6) and a rear protruding part (6), and the top end of a diversion structure (61) of the rear protruding part (6) extends beyond the outermost position of a drainage structure (62) of the front protruding part (6).
2. A PEM water electrolyser anode plate as claimed in claim 1, wherein: the wedge-shaped sharp angle of the converging structure (63) is 45 degrees.
3. A PEM water electrolyser anode plate as claimed in claim 1, wherein: the outlet runner (3) and the inlet runner (1) penetrate from the back of the anode plate to one side of the anode plate connecting bulge (6).
4. A PEM water electrolyser anode plate as claimed in claim 1, wherein: the outlet flow passage (3) and the inlet flow passage (1) are of rectangular groove structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210343911.9A CN114703494B (en) | 2022-03-31 | 2022-03-31 | Anode plate of PEM water electrolytic tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210343911.9A CN114703494B (en) | 2022-03-31 | 2022-03-31 | Anode plate of PEM water electrolytic tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114703494A CN114703494A (en) | 2022-07-05 |
| CN114703494B true CN114703494B (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210343911.9A Active CN114703494B (en) | 2022-03-31 | 2022-03-31 | Anode plate of PEM water electrolytic tank |
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| CN114703494A (en) | 2022-07-05 |
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