CN117735677A - Flow electrochemical reaction device capable of replacing flow channel and used for energy conversion - Google Patents
Flow electrochemical reaction device capable of replacing flow channel and used for energy conversion Download PDFInfo
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- CN117735677A CN117735677A CN202311852139.4A CN202311852139A CN117735677A CN 117735677 A CN117735677 A CN 117735677A CN 202311852139 A CN202311852139 A CN 202311852139A CN 117735677 A CN117735677 A CN 117735677A
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- 238000003487 electrochemical reaction Methods 0.000 title claims abstract description 37
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- 238000007789 sealing Methods 0.000 claims description 11
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
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- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical group OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 5
- 229920002530 polyetherether ketone Polymers 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a flow electrochemical reaction device capable of replacing a flow channel and used for energy conversion, which relates to an electrochemical reaction device. The electrochemical reaction device comprises a first end plate, a second end plate, an electrode plate assembly and a runner plate assembly; the first end plate is provided with a liquid inlet; the second end plate is provided with a liquid outlet; the electrode plate component is clamped and fixed between the first end plate and the second end plate; the runner plate assembly is clamped and fixed in the electrode plate assembly, the runner plate assembly is provided with a reaction runner, one end of the reaction runner is communicated with the liquid inlet, and the other end of the reaction runner is communicated with the liquid outlet. The invention improves the structure of the electrochemical reaction device, has convenient replacement of the runner plate, can select the fluid runner which is most suitable for an energy conversion system, further improves the efficiency of the whole reaction, effectively solves the problems of liquid leakage, poor contact of a column collector and the like which are easy to occur due to excessive components, improves the corrosion resistance of the device, increases the retention time of the reaction liquid in a reaction tank, and improves the mixing efficiency.
Description
Technical Field
The invention relates to the technical field of electrochemical reaction devices, in particular to a flow electrochemical reaction device capable of replacing a flow channel and used for energy conversion.
Background
In the prior art, an electrochemical reaction device comprises a reactor shell, a graphite plate and a stainless steel plate which are vertically arranged in the shell, wherein an S-shaped micro-channel plate is stuck between the graphite plate and the stainless steel plate, an electrolyte inlet and an electrolyte outlet which are communicated with a flow channel of the S-shaped micro-channel plate are arranged on the graphite plate or the stainless steel plate, and a platinum sheet is stuck between the S-shaped micro-channel plate and the stainless steel plate. The reactor shell is vertically provided with a stainless steel plate placing box and a graphite plate placing box, and the stainless steel plate placing box is in plug-in connection with an opening part of the graphite plate placing box. The stainless steel plate and the graphite plate are respectively accommodated in the stainless steel plate accommodating box and the graphite plate accommodating box, locking fixing rods used for locking the stainless steel plate and the graphite plate are respectively arranged on the periphery sides of the stainless steel plate accommodating box and the graphite plate accommodating box, electrode copper rods are arranged at the end parts of the locking fixing rods, and the electrode copper rods respectively abut against and press the stainless steel plate and the graphite plate under the acting force of the locking fixing rods.
However, the collector portion of the electrochemical reaction apparatus is a copper rod, which is in a point-to-point contact form, and is prone to poor contact or uneven electrode potential distribution.
Disclosure of Invention
The invention mainly aims to provide an electrochemical reaction device, which aims to avoid poor contact and improve the uniformity of electrode potential distribution.
To achieve the above object, the present invention provides an electrochemical reaction apparatus comprising:
the first end plate is provided with a liquid inlet;
the second end plate is provided with a liquid outlet and is arranged opposite to the first end plate;
an electrode plate assembly interposed between the first and second end plates; and the runner plate assembly is clamped and fixed in the electrode plate assembly, a reaction runner is arranged on the runner plate assembly, one end of the reaction runner is communicated with the liquid inlet, and the other end of the reaction runner is communicated with the liquid outlet.
Optionally, the electrode plate assembly comprises a first collecting electrode plate, a second collecting electrode plate, a positive electrode and a negative electrode, wherein the positive electrode is arranged on the first collecting electrode plate and is electrically connected with the first collecting electrode plate, and the negative electrode is arranged on the second collecting electrode plate and is electrically connected with the second collecting electrode plate; the runner plate assembly is clamped and fixed between the first collecting electrode plate and the second collecting electrode plate.
Optionally, a first groove is formed on the first collecting electrode plate and is close to one side of the runner plate assembly, the positive electrode is accommodated in the first groove, a second groove is formed on the second collecting electrode plate and is close to one side of the runner plate assembly, and the negative electrode is accommodated in the second groove.
Optionally, the first collector plate is provided with at least one first communication hole penetrating along the thickness direction of the first collector plate, one end of the first communication hole is communicated with the liquid inlet, and the other end of the first communication hole is communicated with the first groove; the second collector plate is provided with at least one second communication hole penetrating through the second collector plate in the thickness direction, one end of the second communication hole is communicated with the liquid outlet, and the other end of the first communication hole is communicated with the second groove.
Optionally, a first sealing ring is arranged at the communication position between the first end plate and the first collector plate, and a second sealing ring is arranged at the communication position between the second end plate and the second collector plate.
Optionally, the material of the first collecting electrode plate and/or the second collecting electrode plate comprises at least one of metallic nickel, copper, gold, silver, platinum, titanium, nonmetallic conductive glass or conductive resin.
Optionally, the flow channel plate assembly includes a first flow channel plate and a second flow channel plate, and the first flow channel plate and the second flow channel plate enclose to form at least one reaction flow channel.
Optionally, the flow channel plate assembly further comprises a diaphragm sandwiched between the first flow channel plate and the second flow channel plate.
Optionally, the material of the first runner plate and/or the second runner plate is soluble polytetrafluoroethylene.
Optionally, the material of the first end plate and/or the second end plate is PEEK or polytetrafluoroethylene.
In the technical scheme of the invention, the electrochemical reaction device comprises a first end plate, a second end plate, an electrode plate assembly and a runner plate assembly; the first end plate is provided with a liquid inlet; the second end plate is provided with a liquid outlet, and the first end plate and the second end plate are oppositely arranged; the electrode plate component is clamped and fixed between the first end plate and the second end plate; the runner plate assembly is clamped and fixed in the electrode plate assembly, the runner plate assembly is provided with a reaction runner, one end of the reaction runner is communicated with the liquid inlet, and the other end of the reaction runner is communicated with the liquid outlet. It can be understood that the contact area between the positive electrode and the corresponding collector and the contact area between the negative electrode and the corresponding collector are increased by adopting the plate-shaped collector, so that the stability of electric connection can be effectively ensured, poor contact is avoided, and the uniformity of electrode potential distribution can be improved. In addition, compared with the existing column type collector structure, the electrochemical reaction device does not need to be provided with holes on the end plate to install the collector, improves the sealing performance and avoids liquid leakage at the collector.
The electrochemical reaction device can also be used as a model reactor for researching the influence of a flow channel structure on the reaction, and is beneficial to researching the problems of multiple physical field coupling such as hydrodynamics, mass transfer, chemical reaction and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the structure of an electrochemical reaction apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of an electrochemical reaction apparatus according to another embodiment of the present invention;
FIG. 3 is an exploded view of an embodiment of the electrochemical reaction apparatus of the present invention.
Reference numerals illustrate:
10. a first end plate; 20. a second end plate; 30. an electrode plate assembly; 40. a flow conduit plate assembly; 10a, a liquid inlet; 20a, a liquid outlet; 31. a first collector plate; 32. a second collecting electrode plate; 33. a positive electrode; 34. a negative electrode; 32a, a second groove; 51. a first seal ring; 52. a second seal ring; 41. a first flow channel plate; 42. a second flow path plate; 43. a diaphragm.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a flow electrochemical reaction device capable of replacing a flow channel and used for energy conversion.
Referring to fig. 1 to 3, in an embodiment of the present invention, the electrochemical reaction apparatus includes a first end plate 10, a second end plate 20, an electrode plate assembly 30, and a flow channel plate assembly 40; the first end plate 10 is provided with a liquid inlet 10a; the second end plate 20 is provided with a liquid outlet 20a, and the first end plate 10 is arranged opposite to the second end plate 20; the electrode plate assembly 30 is sandwiched and fixed between the first end plate 10 and the second end plate 20; the runner plate assembly 40 is clamped and fixed in the electrode plate assembly 30, the runner plate assembly 40 is provided with a reaction runner, one end of the reaction runner is communicated with the liquid inlet 10a, and the other end of the reaction runner is communicated with the liquid outlet 20 a. The reaction flow channel may be S-shaped, elongated, square, circular, etc., and is not limited herein.
In this embodiment, the first end plate 10 and the second end plate 20 are two plate structures for fixing the front and rear ends of the electrode plate assembly 30 and the runner plate assembly 40, and the number of the first end plate 10 and the second end plate 20 may be one, two or more, and in order to ensure good tightness of the electrochemical reaction apparatus against leakage, it is preferable that one each is not limited thereto.
In this embodiment, referring to fig. 2 and 3, the electrode plate assembly 30 may include a first collecting electrode plate 31, a second collecting electrode plate 32, a positive electrode 33, and a negative electrode 34, the positive electrode 33 being disposed on and electrically connected to the first collecting electrode plate 31, the negative electrode 34 being disposed on and electrically connected to the second collecting electrode plate 32; the flow field plate assembly 40 is sandwiched and fixed between the first collector plate 31 and the second collector plate 32. The structure of the other surface contact is not limited, and is also applicable.
It can be appreciated that the contact area between the positive electrode 33 and the corresponding collector and the contact area between the negative electrode 34 and the corresponding collector are increased by adopting the plate-shaped collector, so that the stability of electric connection can be effectively ensured, poor contact can be avoided, and the uniformity of electrode potential distribution can be improved. In addition, compared with the existing column type collector structure, the electrochemical reaction device does not need to be provided with holes on the end plate to install the collector, improves the sealing performance and avoids leakage at the installation position of the collector.
In addition, the electrochemical reaction device can be used as a model reactor for researching the influence of a flow channel structure on the reaction, and is beneficial to researching the problems of multiple physical field coupling such as hydrodynamics, mass transfer, chemical reaction and the like.
To reduce the overall thickness and weight of the electrochemical reaction apparatus, referring mainly to fig. 3, in one embodiment, a first groove may be formed on a side of the first collecting electrode plate 31, which is abutted against the flow channel plate assembly 40, the positive electrode 33 is received in the first groove, a second groove 32a may be formed on a side of the second collecting electrode plate 32, which is abutted against the flow channel plate assembly 40, and the negative electrode 34 is received in the second groove 32 a.
In this embodiment, the first collecting electrode plate 31 may be provided with at least one first communicating hole penetrating in the thickness direction thereof, one end of the first communicating hole communicating with the liquid inlet 10a, and the other end of the first communicating hole communicating with the first recess; the second collecting electrode plate 32 may be provided with at least one second communication hole penetrating in its thickness direction, one end of which communicates with the liquid outlet 20a, and the other end of which communicates with the second recess 32 a.
In this scheme, this chemical reaction device's collector part reduces thickness greatly through reasonable design, and recess and intercommunicating pore are dug out to the center of two collector plates, can conveniently install the electrode to make inlet and outlet hole and reaction channel circulation.
It should be noted that, the components of the chemical reaction apparatus may be fully mechanically mounted, and in particular, may be screw-fixed, which is not limited herein. The materials of the first and second collecting electrode plates 31 and 32 are not limited to a series of easily processed conductive materials such as metallic nickel, copper, gold, silver, platinum, titanium, non-metallic conductive glass, conductive resin, etc.
To further avoid leakage, in an embodiment, a first sealing ring 51 may be provided at the connection between the first end plate 10 and the first collector plate 31, and a second sealing ring 52 may be provided at the connection between the second end plate 20 and the second collector plate 32.
In this embodiment, the first sealing ring 51 and the second sealing ring 52 may be O-shaped sealing rings, and the material thereof may be rubber, etc., which is not limited herein.
Referring to fig. 2 and 3, in an embodiment, the flow channel plate assembly 40 may include a first flow channel plate 41 and a second flow channel plate 42, where the first flow channel plate 41 and the second flow channel plate 42 enclose at least one reaction flow channel.
In this embodiment, the flow field plate assembly 40 further includes a diaphragm 43 sandwiched between the first flow field plate 41 and the second flow field plate 42, and the diaphragm 43 may be an ion exchange membrane, which is not limited herein.
The diaphragm 43 is an optional member, and is disposed in the electrochemical reaction cell (i.e., the reaction channel), and divides the electrochemical reaction cell into a cathode chamber and an anode chamber, wherein a catholyte can be injected into the cathode chamber, and an anolyte can be injected into the anode chamber. The membrane 43 can be used not only to achieve efficient mass transfer of ions between the cathode and anode chambers, but also to achieve gas barrier between the cathode and anode chambers.
In this embodiment, the first flow field plate 41 and the second flow field plate 42 are made of soluble polytetrafluoroethylene or the like. The material of the first end plate 10 and the second end plate 20 may be PEEK, polytetrafluoroethylene, or the like, and is not limited thereto.
The first end plate 10 and the second end plate 20 are made of insulating materials such as PEEK or polytetrafluoroethylene, and are made of non-conductive metal materials (such as stainless steel), so that unexpected electrical short circuit can be avoided on the premise that gaskets are not used, the composition of the structural components is reduced, and the overall assembly difficulty is greatly reduced.
The flow channel interfaces on the first end plate 10 and the second end plate 20 can be designed to connect with commercially available PEEK fittings that have excellent liquid sealing properties and versatility and are readily available. Because the end plate is easy to process, the end plate can be replaced by other common connectors, such as a direct-insertion stainless steel liquid connector.
In the prior art, the rigidity of the common external runner material is poor, self-curling is easy to occur, the reaction tank pressure can be increased under the thicker runner by using the material, and the performance of the device is reduced. The flow channels of the flow electrochemical reactor with excellent cell pressure are usually built-in end plates, so that the flow channels are expensive to manufacture and difficult to replace, if the flow channels are replaced, the end plates of the reactor are cut again, and the integration of the current collector and the end plates additionally increases unnecessary cost. The external flow channel part of the invention adopts PFA material, namely polytetrafluoroethylene, which has extremely strong chemical inertness and chemical corrosion resistance at normal temperature, almost reacts with all acid, alkali, salt, solvent, halogen and other chemical substances, more importantly, the material has excellent rigidity under the condition of extremely thin thickness, can not self-curl, has extremely strong toughness, can not bend and break, is easy to process, and can be used for designing various types of flow channels by combining common industrial design software such as CAD, solidworks, C D and the like, and is convenient to replace. Aiming at different energy conversion systems, such as electrocatalytic biomass conversion, electrolyzed water oxidation, electrolyzed water hydrogen evolution and the like, a fluid flow passage which is most suitable for the system can be selected, so that the efficiency of the whole reaction is maximized.
In addition, the existing electrochemical reactor with external flow channels is easy to chemically react with chemicals in the system or generate metal corrosion. In addition, chlorine ions and hydrogen ions can cause irreversible corrosion to metal structural members for certain high corrosion conditions, such as seawater electrolysis, PEM electrolysis cells, and the like. A common solution is to use metallic titanium and other noble metals. The electrochemical reaction apparatus of the present invention can use 3D printing to prepare corrosion-resistant nonmetallic structural components except for the electrode plate assembly 30, which is a metallic component. Meanwhile, compared with the traditional machining mode, the first end plate 10 and the second end plate 20 which are prepared by 3D printing are provided with fluid channel interfaces, so that the fluid channel interfaces can be coupled with the flow channels which are manufactured by fine cutting, the retention time of the reaction liquid is increased, and the mixing efficiency is further improved.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. An electrochemical reaction apparatus, comprising:
the first end plate is provided with a liquid inlet;
the second end plate is provided with a liquid outlet and is arranged opposite to the first end plate;
an electrode plate assembly interposed between the first and second end plates; and
the runner plate assembly is clamped and fixed in the electrode plate assembly, a reaction runner is arranged on the runner plate assembly, one end of the reaction runner is communicated with the liquid inlet, and the other end of the reaction runner is communicated with the liquid outlet.
2. The electrochemical reaction apparatus of claim 1 wherein said electrode plate assembly comprises a first collecting electrode plate, a second collecting electrode plate, a positive electrode and a negative electrode, said positive electrode being disposed on and electrically connected to said first collecting electrode plate, said negative electrode being disposed on and electrically connected to said second collecting electrode plate; the runner plate assembly is clamped and fixed between the first collecting electrode plate and the second collecting electrode plate.
3. The electrochemical reaction apparatus of claim 2 wherein a first recess is provided in said first collector plate adjacent said flow field plate assembly, said positive electrode is received in said first recess, a second recess is provided in said second collector plate adjacent said flow field plate assembly, and said negative electrode is received in said second recess.
4. The electrochemical reaction apparatus according to claim 3, wherein the first collector plate is provided with at least one first communication hole penetrating in a thickness direction thereof, one end of the first communication hole being in communication with the liquid inlet, the other end of the first communication hole being in communication with the first recess; the second collector plate is provided with at least one second communication hole penetrating through the second collector plate in the thickness direction, one end of the second communication hole is communicated with the liquid outlet, and the other end of the first communication hole is communicated with the second groove.
5. The electrochemical reaction apparatus of claim 4, wherein a first seal ring is provided at a communication place between said first end plate and said first collector plate; and/or
And a second sealing ring is arranged at the communication part between the second end plate and the second collector plate.
6. The electrochemical reaction apparatus of claim 2, wherein the material of said first and/or second collector plates comprises at least one of metallic nickel, copper, gold, silver, platinum, titanium, non-metallic conductive glass, or conductive resin.
7. The electrochemical reaction apparatus of any one of claims 1 to 6, wherein said flow field plate assembly comprises a first flow field plate and a second flow field plate, said first flow field plate and said second flow field plate surrounding to form at least one of said reaction channels.
8. The electrochemical reaction device of claim 7, wherein said flow field plate assembly includes a diaphragm sandwiched between said first flow field plate and said second flow field plate.
9. The electrochemical reaction apparatus according to claim 7, wherein the material of the first flow field plate and/or the second flow field plate is soluble polytetrafluoroethylene.
10. The electrochemical reaction apparatus of claim 1, wherein the material of the first end plate and/or the second end plate is PEEK or polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311852139.4A CN117735677A (en) | 2023-12-28 | 2023-12-28 | Flow electrochemical reaction device capable of replacing flow channel and used for energy conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311852139.4A CN117735677A (en) | 2023-12-28 | 2023-12-28 | Flow electrochemical reaction device capable of replacing flow channel and used for energy conversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117735677A true CN117735677A (en) | 2024-03-22 |
Family
ID=90250893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311852139.4A Pending CN117735677A (en) | 2023-12-28 | 2023-12-28 | Flow electrochemical reaction device capable of replacing flow channel and used for energy conversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117735677A (en) |
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2023
- 2023-12-28 CN CN202311852139.4A patent/CN117735677A/en active Pending
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