CN216237301U - Efficient proton exchange membrane electrolytic cell - Google Patents
Efficient proton exchange membrane electrolytic cell Download PDFInfo
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- CN216237301U CN216237301U CN202122003835.0U CN202122003835U CN216237301U CN 216237301 U CN216237301 U CN 216237301U CN 202122003835 U CN202122003835 U CN 202122003835U CN 216237301 U CN216237301 U CN 216237301U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The utility model discloses an efficient proton exchange membrane electrolytic cell, which comprises a cell body with two open ends and a hollow cavity structure, wherein end plates are correspondingly arranged on two sides of the cell body, a plurality of electrolytic units are correspondingly arranged between the end plates, the electrolytic units are correspondingly and axially arranged in the middle of the cell body, a cathode gas outlet and an anode gas outlet are correspondingly arranged on the upper parts of the end plates, a plurality of liquid inlets are arranged on the lower parts of the end plates, and the cathode gas outlet, the anode gas outlet and the liquid inlets are sequentially and correspondingly communicated with the cell body. The utility model ensures that the flow distribution of the internal liquid is more uniform, fully utilizes the active area of the electrolytic cell, improves the mass transfer efficiency of the fluid and further improves the energy efficiency value of the electrolytic cell.
Description
Technical Field
The utility model relates to the technical field of hydrogen production by water electrolysis, in particular to a high-efficiency proton exchange membrane electrolytic cell.
Background
Wind power and solar power have volatility, which affects the stability and reliability of the power grid. Therefore, there is a pressing need for an energy storage system that can absorb more than the capacity of the transmission line to reduce the waste of renewable energy power. The electrolysis can provide support for the power grid in the aspects of peak shaving, voltage control and load transfer. Cost-effective and energy efficient proton exchange membrane electrolyzers can convert part of the overloaded electrical energy into chemical energy for storage in chemicals.
The principle of the proton exchange membrane electrolyzer is shown in figure 1: the proton exchange membrane electrolytic cell for producing hydrogen by electrolyzing water consists of a cathode, an anode and a proton exchange membrane. Proton exchange membranes allow protons to pass through, while other ions do not. When a direct current of a certain voltage is passed, water is decomposed to generate oxygen and hydrogen at the anode and cathode, respectively. The reaction on the electrode in the electrolysis process of the proton exchange membrane electrolytic cell is as follows:
cathode: 4H + +4e- → 2H2
Anode: 4H2O → 02+4H + +4e-
A battery: 2H20 → 2H2+02
The electric power response of the proton exchange membrane electrolytic cell is rapid. In order to reduce manufacturing costs and improve energy conversion efficiency, it is necessary to reduce the film thickness, increase the current density, and reduce the noble metal loading.
The potential for water decomposition was 1.23V (room temperature, normal pressure). However, higher potentials are required in the electrolysis of water. Actual operating voltage of electrolyzed water (E)op) The general description is:
E。p＝１.23+ηc+ηa+η。
ηcand ηaAre intrinsic activation barriers for the cathode and anode reactions, respectively. Other damping (η)o) The overpotential of the water electrolysis process, such as the solution resistance and the contact resistance, is increased. The common electrolytic cell has the defects that a flow guide channel between a fluid channel of the electrolytic cell and an electrolytic area in the electrolytic cell is single and narrow, the distribution of fluid in the electrolytic cell is uneven, the mass transfer rate is low, the solution resistance and the contact resistance are high, the electric energy utilization rate is low, and the like. Therefore, it is necessary to design a proton exchange membrane electrolyzer with high efficiency.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, a high-efficiency proton exchange membrane electrolytic cell is provided.
The utility model is realized by the following scheme:
an efficient proton exchange membrane electrolytic cell comprises a cell body with two open ends and a hollow cavity structure, wherein two sides of the cell body are respectively and correspondingly provided with an end plate, a plurality of electrolysis units are correspondingly arranged between the end plates, the electrolysis units are correspondingly and axially arranged in the middle of the tank body, the electrolysis unit comprises a proton exchange membrane, two sides of the proton exchange membrane are respectively and correspondingly provided with a polar frame, one side of one of the pole frames is correspondingly provided with a cathode plate, the other side of the other pole frame is correspondingly provided with an anode plate, the side edges of the cathode plate and the anode plate are respectively provided with a sealing gasket and a clapboard in sequence, the upper part of the end plate is correspondingly provided with a cathode gas outlet and an anode gas outlet, the lower part of the end plate is provided with a plurality of liquid inlets, and the cathode gas outlet, the anode gas outlet and the liquid inlets are sequentially and correspondingly communicated with the tank body.
A plurality of the pull rods are correspondingly arranged between the end plates, a plurality of through holes are uniformly formed in the peripheries of the end plates, and the through holes are correspondingly connected with the pull rods.
And the surface of the proton exchange membrane is coated with a noble metal catalytic coating.
The polar frame comprises a polar frame body of a hollow frame structure, a hydrogen outlet and an oxygen outlet are correspondingly formed in the upper portion of the polar frame body, a second liquid inlet is formed in the lower portion of the polar frame body, and the second liquid inlet is correspondingly communicated with the flow guide ports respectively.
The hydrogen outlet and the oxygen outlet are symmetrically arranged about the axis of the pole frame body, the hydrogen outlet is correspondingly communicated with the cathode gas outlet, and the oxygen outlet is correspondingly communicated with the anode gas outlet.
The second liquid inlet is correspondingly communicated with the liquid inlet, and the plurality of flow guide ports are respectively and correspondingly communicated with the groove body.
The utility model has the beneficial effects that:
1. the efficient proton exchange membrane electrolytic cell can improve the fluid distribution in the electrolytic cell, liquid enters the cell body through the lower liquid inlet, then flows through the second liquid inlet at the lower part of the polar frame and then forms a plurality of uniformly distributed flow guide channels through the flow guide ports to enter an electrolytic area, so that the liquid can uniformly flow through the active area of the electrode plate.
2. According to the efficient proton exchange membrane electrolytic cell, liquid in the electrolytic cell forms a plurality of uniformly distributed flow guide channels through the flow guide ports to enter the cell body, so that the liquid uniformly flows through the active area of the electrode plate, the active area of the electrode plate is fully contacted with the liquid, and the mass transfer efficiency of the fluid is effectively improved.
Drawings
FIG. 1 is an exploded view of a high efficiency proton exchange membrane electrolyzer of the present invention;
FIG. 2 is a schematic diagram of an end plate of a high efficiency PEM electrolyzer of the present invention;
FIG. 3 is a schematic diagram of a structure of a frame of a high efficiency proton exchange membrane electrolyzer of the present invention;
in the figure: 1 is the cell body, 2 is the end plate, 3 is proton exchange membrane, 4 is the utmost point frame, 41 is the utmost point frame body, 42 is the hydrogen export, 43 is the oxygen export, 44 is the second liquid import, 45 is the water conservancy diversion mouth, 5 is the cathode plate, 6 is the anode plate, 7 is seal gasket, 8 is the baffle, 9 is the cathode gas export, 10 is the anode gas export, 11 is the liquid import, 12 is the through-hole.
Detailed Description
The preferred embodiments of the present invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1 and 2, a high-efficiency proton exchange membrane electrolyzer comprises an electrolyzer body 1 with two open ends and a hollow cavity structure, wherein end plates 2 are correspondingly arranged on both sides of the electrolyzer body 1, and the end plates 2 are plates made of metal and used for applying pressure to a polar frame 4 and a sealing gasket 7 on the periphery of an electrolysis area. In this embodiment, the end plates 2 are disposed on both sides of the plurality of electrolysis units to perform fixing and protecting functions.
Correspond between the end plate 2 and be equipped with a plurality of electrolysis unit, the electrolysis unit corresponds the middle of axial setting at cell body 1, the electrolysis unit includes proton exchange membrane 3 the both sides of proton exchange membrane 3 are equallyd divide and are do not correspond and be equipped with utmost point frame 4, one of them one side correspondence of utmost point frame 4 is equipped with cathode plate 5, cathode plate 5 is made by metal nickel or nickel-plated metal sheet. The other side of the other pole frame 4 is correspondingly provided with an anode plate 6, and the anode plate 6 can be made of titanium alloy or carbon steel. The side edges of the cathode plate 5 and the anode plate 6 are respectively and sequentially provided with a sealing gasket 7 and a clapboard 8, and the sealing gasket 7 is made of high-temperature-resistant and wear-resistant polymer. In this embodiment, the electrolysis unit is sequentially provided with the separator 8, the sealing gasket 7, the cathode plate 5, the polar frame 4, the proton exchange membrane 3, the polar frame 4, the anode plate 6, the sealing gasket 7 and the separator 8 from left to right, so that one electrolysis unit can also complete the water electrolysis. The utility model can be provided with a plurality of electrolysis units according to production requirements, and each electrolysis unit can independently complete the electrolysis process, thereby improving the efficiency of liquid electrolysis.
The upper part of the end plate 2 is correspondingly provided with a cathode gas outlet 9 and an anode gas outlet 10, the lower part of the end plate 2 is provided with a plurality of liquid inlets 11, and the cathode gas outlet 9, the anode gas outlet 10 and the liquid inlets 11 are sequentially and correspondingly communicated with the tank body 1. The utility model is communicated with the outside through a cathode gas outlet 9, an anode gas outlet 10 and a liquid inlet 11 which are arranged on an end plate 2, wherein the cathode gas outlet 9 collects hydrogen, the anode gas outlet 10 collects oxygen, and the liquid inlet 11 is used for feeding water.
As shown in fig. 2, a plurality of pull rods are correspondingly arranged between the end plates 2, a plurality of through holes 12 are uniformly arranged on the periphery of the end plates 2, and the through holes 12 are correspondingly connected with the pull rods. According to the utility model, the pull rod penetrates through the through hole 12 to connect the two end plates 2, so that the overall structural strength is reinforced, and the service life is prolonged.
The surface of the proton exchange membrane 3 is coated with a noble metal catalytic coating, so that the exchange efficiency of the proton exchange membrane 3 is improved, and the purpose of improving the energy efficiency value of the electrolytic cell is achieved. In this embodiment, the surface of the proton exchange membrane 3 is coated with a precious metal catalytic coating of platinum and ruthenium oxide.
As shown in fig. 3, the polar frame 4 includes a polar frame body 41 with a hollow frame structure, and the polar frame 4 is made of a polymer material by injection molding and compression molding. The upper part of the polar frame body 41 is correspondingly provided with a hydrogen outlet 42 and an oxygen outlet 43, the lower part of the polar frame body 41 is provided with a second liquid inlet 44, and the second liquid inlet 44 is respectively and correspondingly communicated with a plurality of flow guide ports 45. According to the utility model, the second liquid inlet 44 is arranged at the lower part of the polar frame body 41, so that the polar frame body is conveniently and correspondingly communicated with the end plate 2, and liquid enters from the bottom, so that the contact area between the liquid and the electrolytic unit is increased, the mass transfer efficiency of the fluid is improved, and the working efficiency of the electrolytic unit is increased.
The hydrogen outlet 42 and the oxygen outlet 43 are symmetrically arranged about the axis of the polar frame body 41, the hydrogen outlet 42 is correspondingly communicated with the cathode gas outlet 9, and the oxygen outlet 43 is correspondingly communicated with the anode gas outlet 10. The hydrogen outlet 42 and the oxygen outlet 43 are arranged in an axisymmetric manner, so that the gas can be rapidly output, and the potential safety hazard caused by the gas accumulated in the tank body 1 can be prevented.
The second liquid inlet 44 is correspondingly communicated with the liquid inlet 11, and the plurality of flow guide ports 45 are respectively and correspondingly communicated with the tank body 1. A plurality of evenly distributed flow guide channels are formed between the flow guide ports 45 and the tank body 1, namely a plurality of flow guide channels are arranged between the liquid and the electrolytic area in the tank body 1, so that the liquid uniformly flows through the active area of the electrode plate, the active area of the electrode plate is fully contacted with the liquid, and the mass transfer efficiency of the fluid is effectively improved.
Example 1
The polar frame 4 is made of a high polymer material polysulfone through injection molding and compression molding, a hydrogen outlet 42 and an oxygen outlet 43 are correspondingly formed in the upper portion of the polar frame body 41, a second liquid inlet 44 is formed in the lower portion of the polar frame body 41, and the second liquid inlet 44 is correspondingly communicated with 10 flow guide ports 45 respectively, so that 10 uniformly distributed flow guide channels are formed between the flow guide ports 45 and an electrolysis area in the tank body 1. The anode plate 6 is made of titanium alloy. The cathode plate 5 is made of a nickel-plated metal plate. The sealing gasket 7 is made of high-temperature-resistant and wear-resistant high polymer material polytetrafluoroethylene.
Example 2
In this embodiment, the same points as those in embodiment 1 are not described again, but the differences are:
in this embodiment, the pole frame 4 is made of a polymer material, i.e., polyphenylene oxide, through injection molding and compression molding, the upper portion of the pole frame body 41 is correspondingly provided with a hydrogen outlet 42 and an oxygen outlet 43, the lower portion of the pole frame body 41 is provided with a second liquid inlet 44, and the second liquid inlet 44 is respectively and correspondingly communicated with 4 flow guide ports 45, so that 4 uniformly distributed flow guide channels are formed between the flow guide ports 45 and the electrolytic area inside the tank body 1. The anode plate 6 is made of carbon steel. The cathode plate 5 is made of nickel mesh, and the mesh number of the mesh is 65.
According to the efficient proton exchange membrane electrolytic cell, liquid in the electrolytic cell forms a plurality of uniformly distributed flow guide channels through the flow guide ports to enter the cell body, so that the liquid uniformly flows through the active area of the electrode plate, the active area of the electrode plate is fully contacted with the liquid, and the mass transfer efficiency of the fluid is effectively improved. Because the mass transfer efficiency of the fluid is improved, the transmission rate of charged ions in the electrolytic cell is improved, the contact resistance and the solution resistance are reduced, and the current density is increased, thereby improving the energy efficiency value of the electrolytic cell.
Although the utility model has been described and illustrated in some detail, it should be understood that various modifications may be made to the described embodiments or equivalents may be substituted, as will be apparent to those skilled in the art, without departing from the spirit of the utility model.
Claims (6)
1. The utility model provides an efficient proton exchange membrane electrolysis trough, includes that both ends open cell body (1) of cavity structures the both sides of cell body (1) all correspond and are equipped with end plate (2), its characterized in that: a plurality of electrolysis units are correspondingly arranged between the end plates (2), the electrolysis units are correspondingly and axially arranged in the middle of the tank body (1), the electrolysis units comprise proton exchange membranes (3), both sides of the proton exchange membrane (3) are respectively and correspondingly provided with a polar frame (4), one side of one of the pole frames (4) is correspondingly provided with a cathode pole plate (5), the other side of the other pole frame (4) is correspondingly provided with an anode pole plate (6), the side edges of the cathode plate (5) and the anode plate (6) are respectively provided with a sealing gasket (7) and a clapboard (8) in turn, the upper part of the end plate (2) is correspondingly provided with a cathode gas outlet (9) and an anode gas outlet (10), the lower part of the end plate (2) is provided with a plurality of liquid inlets (11), the cathode gas outlet (9), the anode gas outlet (10) and the liquid inlet (11) are sequentially and correspondingly communicated with the tank body (1).
2. A high efficiency proton exchange membrane electrolyzer as recited in claim 1, wherein: a plurality of pull rods are correspondingly arranged between the end plates (2), a plurality of through holes (12) are uniformly formed in the periphery of the end plates (2), and the through holes (12) are correspondingly connected with the pull rods.
3. A high efficiency proton exchange membrane electrolyzer as recited in claim 1, wherein: the surface of the proton exchange membrane (3) is coated with a noble metal catalytic coating.
4. A high efficiency proton exchange membrane electrolyzer as recited in claim 1, wherein: the polar frame (4) comprises a polar frame body (41) of a hollow frame structure, a hydrogen outlet (42) and an oxygen outlet (43) are correspondingly formed in the upper portion of the polar frame body (41), a second liquid inlet (44) is formed in the lower portion of the polar frame body (41), and the second liquid inlet (44) is correspondingly communicated with a plurality of flow guide ports (45) respectively.
5. A high efficiency proton exchange membrane electrolyzer as recited in claim 4, wherein: the hydrogen outlet (42) and the oxygen outlet (43) are symmetrically arranged relative to the axis of the polar frame body (41), the hydrogen outlet (42) is correspondingly communicated with the cathode gas outlet (9), and the oxygen outlet (43) is correspondingly communicated with the anode gas outlet (10).
6. A high efficiency proton exchange membrane electrolyzer as recited in claim 4, wherein: the second liquid inlet (44) is correspondingly communicated with the liquid inlet (11), and the plurality of flow guide ports (45) are correspondingly communicated with the tank body (1) respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122003835.0U CN216237301U (en) | 2021-08-24 | 2021-08-24 | Efficient proton exchange membrane electrolytic cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122003835.0U CN216237301U (en) | 2021-08-24 | 2021-08-24 | Efficient proton exchange membrane electrolytic cell |
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| Publication Number | Publication Date |
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| CN216237301U true CN216237301U (en) | 2022-04-08 |
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| CN202122003835.0U Active CN216237301U (en) | 2021-08-24 | 2021-08-24 | Efficient proton exchange membrane electrolytic cell |
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- 2021-08-24 CN CN202122003835.0U patent/CN216237301U/en active Active
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