A large-size electrolysis reactor based on a novel flow channel

Abstract

This invention discloses a large-size electrolytic reactor based on a novel flow channel, comprising a combined reaction unit. The combined reaction unit has two centrally symmetrically distributed first channel connectors and two centrally symmetrically distributed second channel connectors at its top and bottom. The combined reaction unit includes electrolytic components evenly distributed along a straight direction, each electrolytic component comprising two symmetrically distributed electrode flow channel plates. This invention, through the flow channel design of the electrode flow channel plates and the parallel partitioned arrangement, ensures smooth and uniform flow through multiple branching and converging flow channels. Simultaneously, the inlet and outlet are set with a dot matrix, increasing the uniformity of different partitions. The oblique groove design enhances the flow channel connectivity, further increasing the flow field uniformity. It is suitable for large-size reactors, solving the problems of numerous, long, and unevenly distributed flow channels, effectively improving electrolysis efficiency.

Description

Technical Field

[0001] This invention belongs to the field of carbon dioxide electrolysis, and particularly relates to a large-size electrolysis reactor based on a novel flow channel. Background Technology

[0002] To address climate change and achieve the "dual carbon" goal, electrocatalytic reduction of carbon dioxide into fuels such as carbon monoxide, methanol, and formic acid is a promising approach. This approach enables the resource utilization of carbon dioxide and the effective storage of clean energy, significantly improving the absorption capacity of new energy power generation systems such as solar and wind power, and achieving a green carbon cycle.

[0003] Catalytic conversion technologies for carbon dioxide include photocatalysis, thermocatalysis, enzyme catalysis, plasma catalysis, and electrocatalysis. Among these, photocatalysis has very low conversion efficiency; thermocatalysis requires harsh conditions of high temperature and pressure and has low selectivity for specific target products; enzyme catalysis has high requirements for the reaction microenvironment and the cost of coenzymes is also high; plasma catalysis can achieve very high conversion rates, but its energy efficiency is very low; electrocatalysis of carbon dioxide can be carried out in aqueous solutions at room temperature and pressure, without the need for complex reaction equipment, and can utilize renewable electricity to achieve carbon dioxide reduction under mild conditions, demonstrating its unique technological advantages and facilitating large-scale practical applications.

[0004] Currently, large-scale carbon dioxide electrolysis reactors often face uneven fluid distribution due to their numerous and long flow channels, which affects electrolysis efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems in the prior art and provide a large-size electrolysis reactor based on a novel flow channel.

[0006] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0007] A large-size electrolysis reactor based on a novel flow channel includes a combined reaction unit, wherein the top and bottom of the combined reaction unit are provided with two first channel connectors and two second channel connectors that are centrally symmetrically distributed;

[0008] The combined reaction unit includes an electrolysis assembly evenly distributed along a straight line. The electrolysis assembly includes two symmetrically distributed electrode flow channel plates. A sealing plate is fixed between the edges of the two electrode flow channel plates. A through groove is provided in the middle of the sealing plate, and a proton exchange membrane is installed in the middle of the through groove.

[0009] The electrode flow channel plate has a centrally symmetrical structure. An oblique groove is inclinedly provided in the center of the electrode flow channel plate surface. On both sides of the oblique groove, there are centrally symmetrical flow-dividing regions. The flow-dividing regions include flow-dividing and converging channels distributed sequentially along the oblique groove. The flow-dividing and converging channels include a first longitudinal channel and a transverse channel that are vertically connected. A second longitudinal channel is distributed on the transverse channel. The flow distance of each second longitudinal channel near the oblique groove end is the same as that of the first longitudinal channel away from the oblique groove end. At the opening of the first longitudinal channel away from the oblique groove end, there are arrayed dot matrix channels. The outer ends of the dot matrix channels are connected to opening slots.

[0010] The first channel connector includes a vertically distributed channel connecting plate and a first side clamping plate. The end of the channel connecting plate is evenly distributed with a first connecting strip along a straight direction. The surface of the first connecting strip is provided with a first connecting opening corresponding to the opening groove. The inside of the channel connecting plate is provided with a first connecting cavity communicating with the first connecting opening. The middle of the first side clamping plate is provided with a first connecting pipe communicating with the first connecting cavity.

[0011] The second channel connector includes a second side clamp and a second connecting strip evenly distributed on the second side clamp along a straight direction. The surface of the second connecting strip is provided with a second connecting opening corresponding to the opening groove. The interior of the second side clamp is provided with a second connecting cavity communicating with the second connecting opening. The middle of the second side clamp is provided with a second connecting pipe communicating with the second connecting cavity.

[0012] Furthermore, the distance between two adjacent first connecting strips is equal to the width of the second connecting strip, and the lengths of the first connecting strip and the second connecting strip are equal.

[0013] Furthermore, a sealing baffle is installed around the periphery of the combined reaction unit, and the two ends of the sealing baffle are fixedly connected to the first channel connector and the second channel connector.

[0014] Furthermore, the sum of the lengths of the channel connecting plate and the first connecting strip is equal to the edge length of the combined reaction unit.

[0015] Furthermore, annular sealing material is provided between the opening groove and the first connecting opening, and between the opening groove and the second connecting opening.

[0016] The beneficial effects of this invention are:

[0017] This invention utilizes the flow channel design of the electrode flow channel plate, employing a parallel partitioned arrangement. Multiple branching and converging flow channels ensure smooth and uniform flow. Simultaneously, the inlet and outlet are set with a dot matrix, further increasing the uniformity of different partitions. The design of the oblique groove enhances the connectivity of the flow channels, further increasing the uniformity of the flow field. It is suitable for large-sized reactors, solving the problems of numerous, long, and unevenly distributed flow channels, effectively improving electrolysis efficiency. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is an exploded view of the structure of the present invention;

[0021] Figure 3 This is a partial exploded view of the structure of the present invention;

[0022] Figure 4 This is a partial structural schematic diagram of the present invention;

[0023] Figure 5 This is a partial structural schematic diagram of the present invention;

[0024] Figure 6 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0027] like Figure 1 and Figure 2 The large-size electrolysis reactor shown includes a combined reaction unit 1, with two centrally symmetrically distributed first channel connectors 2 and two centrally symmetrically distributed second channel connectors 3 at the top and bottom of the combined reaction unit 1.

[0028] like Figure 3 As shown, the combined reaction unit 1 includes an electrolysis component evenly distributed along a straight line. The electrolysis component includes two symmetrically distributed electrode flow channel plates 4. A sealing plate 5 is fixed between the edges of the two electrode flow channel plates 4. A through groove 51 is provided in the middle of the sealing plate 5. A proton exchange membrane 6 is installed in the middle of the through groove 51.

[0029] like Figure 4 As shown, the electrode flow channel plate 4 has a centrally symmetrical structure; a slanted groove 44 is inclinedly provided in the center of the surface of the electrode flow channel plate 4, and a centrally symmetrical flow-dividing region is provided on both sides of the slanted groove 44. The flow-dividing region includes flow-dividing converging channels distributed sequentially along the slanted groove 44. The flow-dividing converging channels include a first longitudinal flow channel 431 and a transverse flow channel 432 connected vertically. A second longitudinal flow channel 433 is distributed on the transverse flow channel 432. The flow distance of each second longitudinal flow channel 433 near the slanted groove 44 is the same as that of the first longitudinal flow channel 431 away from the slanted groove 44. At the opening of the first longitudinal flow channel 431 away from the slanted groove 44, an array of dot matrix flow channels 42 are distributed, and the outer end of the dot matrix flow channel 42 is connected to an opening groove 41.

[0030] like Figure 5 As shown, the first channel connector 2 includes a vertically distributed channel connecting plate 21 and a first side clamping plate 22. The end of the channel connecting plate 21 is evenly distributed with a first connecting strip 23 along a straight direction. The surface of the first connecting strip 23 is provided with a first connecting opening 24 corresponding to the opening groove 41. The inside of the channel connecting plate 21 is provided with a first connecting cavity that communicates with the first connecting opening 24. The middle of the first side clamping plate 22 is provided with a first connecting pipe 25 that communicates with the first connecting cavity.

[0031] like Figure 6 As shown, the second channel connector 3 includes a second side clamp 31 and a second connecting strip 32 evenly distributed along the straight direction on the second side clamp 31. The surface of the second connecting strip 32 is provided with a second connecting opening 33 corresponding to the opening groove 41. The interior of the second side clamp 31 is provided with a second connecting cavity communicating with the second connecting opening 33. The middle of the second side clamp 31 is provided with a second connecting pipe 34 communicating with the second connecting cavity.

[0032] The spacing between two adjacent first connecting strips 23 is equal to the width of the second connecting strip 32, and the lengths of the first connecting strip 23 and the second connecting strip 32 are equal. A sealing baffle is installed around the periphery of the combined reaction unit 1, and the two ends of the sealing baffle are fixedly connected to the first channel connector 2 and the second channel connector 3. The sum of the lengths of the channel connecting plate 21 and the first connecting strip 23 is equal to the edge length of the combined reaction unit 1. Annular sealing material is provided between the opening groove 41 and the first connecting opening 24, and between the opening groove 41 and the second connecting opening 33.

[0033] In practical use, the two first channel connectors 2 serve as the inlet and outlet connections for carbon dioxide, and the two second channel connectors 3 serve as the inlet and outlet connections for pure water, thereby enabling large-scale electrolysis of carbon dioxide. Through the flow channel design of the electrode flow channel plate 4, a parallel partitioned arrangement is adopted, and multiple branching and converging flow channels ensure smooth uniformity. At the same time, the inlet and outlet are set with a dot matrix to increase the uniformity of different partitions. The design of the oblique groove 44 enhances the connectivity of the flow channels and further increases the uniformity of the flow field. It is suitable for large-size reactors, solving the problems of a large number of flow channels, long lengths, and uneven fluid distribution, and effectively improving the electrolysis efficiency.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A large size electrolysis reactor based on a new type of flow channel, characterized in that: The combined reaction unit (1) is provided with two first channel connecting pieces (2) and two second channel connecting pieces (3) at the top and bottom of the combined reaction unit (1) and arranged in a central symmetric manner. The combined reaction unit (1) comprises electrolysis assemblies arranged in a straight line, and each electrolysis assembly comprises two electrode flow channel plates (4) arranged in a symmetric manner, and a sealing plate (5) fixed between the edges of the two electrode flow channel plates (4), and a through slot (51) is arranged in the middle of the sealing plate (5), and a proton exchange membrane (6) is arranged in the middle of the through slot (51). The electrode flow channel plate (4) has a central symmetric structure, and an inclined slot (44) is arranged in the middle of the surface of the electrode flow channel plate (4), and a central symmetric flow distribution area is arranged on both sides of the inclined slot (44), and the flow distribution area comprises flow distribution and intersection channels arranged in sequence along the inclined slot (44), and each flow distribution and intersection channel comprises a first longitudinal flow channel (431) and a transverse flow channel (432) connected vertically, and a second longitudinal flow channel (433) is arranged on the transverse flow channel (432), and each second longitudinal flow channel (433) is arranged to have the same flow distance from one end of the inclined slot (44) to the first longitudinal flow channel (431) and from the other end of the inclined slot (44) to the first longitudinal flow channel (431). The first channel connecting piece (2) comprises a channel connecting plate (21) and a first side clamping plate (22) arranged vertically, and the channel connecting plate (21) is provided with first connecting strips (23) arranged in a straight line at the ends of the channel connecting plate (21), and the surface of each first connecting strip (23) is provided with a first connecting opening (24) corresponding to the opening slot (41), and the inside of the channel connecting plate (21) is provided with a first connecting cavity in communication with the first connecting opening (24), and the middle of the first side clamping plate (22) is provided with a first connecting pipe (25) in communication with the first connecting cavity. The second channel connecting piece (3) comprises a second side clamping plate (31) and a second connecting strip (32) arranged in a straight line on the second side clamping plate (31), and the surface of the second connecting strip (32) is provided with a second connecting opening (33) corresponding to the opening slot (41), and the inside of the second side clamping plate (31) is provided with a second connecting cavity in communication with the second connecting opening (33), and the middle of the second side clamping plate (31) is provided with a second connecting pipe (34) in communication with the second connecting cavity.

2. A large size electrolysis reactor based on a new flow channel according to claim 1, characterized in that: The distance between the two adjacent first connecting strips (23) is equal to the width of the second connecting strip (32), and the length of the first connecting strip (23) is equal to the length of the second connecting strip (32).

3. The large size electrolysis reactor based on the novel flow channel according to claim 1, characterized in that: The combined reaction unit (1) is provided with a sealing baffle plate arranged on the side of the combined reaction unit (1), and the two ends of the sealing baffle plate are fixedly connected with the first channel connecting piece (2) and the second channel connecting piece (3).

4. The large size electrolysis reactor based on the novel flow channel according to claim 1, characterized in that: The sum of the length of the channel connecting plate (21) and the length of the first connecting strip (23) is equal to the edge length of the combined reaction unit (1).

5. The large size electrolysis reactor based on the novel flow channel according to claim 1, characterized in that: The annular sealing material is arranged between the opening slot (41) and the first connecting opening (24) and between the opening slot (41) and the second connecting opening (33).

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