Runner structure of electrolytic bath and electrolytic bath

Abstract

The utility model relates to the technical field of hydrogen energy electrolysis hydrogen production, in particular to a runner structure of an electrolytic bath. The runner structure of the electrolytic bath specifically comprises a polar plate main body, the pole plate main body comprises a plurality of inlets, outlets and turbulent flow structures, a fluid direction is formed from the inlets to the outlets, each turbulent flow structure comprises a first turbulent flow unit and a second turbulent flow unit which are narrow in upper part and wide in lower part, and a special-shaped flow channel is formed between the first turbulent flow unit and the second turbulent flow unit; pulse backflow channels are respectively formed between the first turbulent flow unit and the inner wall of the polar plate main body and between the second turbulent flow unit and the inner wall of the polar plate main body; the outlet is close to the special-shaped flow channel, and the inlet is close to the lower end of the first turbulent flow unit and the lower end of the second turbulent flow unit. The electrolytic cell has the advantages that fluid entering the electrolytic cell is uniformly distributed, and the electrolytic efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen energy electrolysis hydrogen production technology, and in particular to a flow channel structure and an electrolyzer. Background Technology

[0002] Hydrogen energy, as a clean and efficient energy form, has enormous development potential. The widespread adoption of hydrogen energy is expected to significantly reduce carbon dioxide emissions and alleviate global climate change. Currently, hydrogen production, storage, and transportation technologies are continuously advancing, especially water electrolysis for hydrogen production, which has attracted considerable attention due to its environmental friendliness and high efficiency. The electrolyzer is the core equipment in water electrolysis for hydrogen production, possessing advantages such as low cost, high stability, and long lifespan, and is therefore widely used in industrial hydrogen production.

[0003] Currently, most electrolytic cells use rectangular or circular structures for the inlet and outlet channels of the electrolysis chamber, lacking a flow equalization structure inside the channels. The fluid flows in a fixed direction, constantly impacting structural components such as the electrode frame, main electrode plate, and electrode mesh, as well as internal parts of the electrolytic cell. This easily erodes and damages the electrode frame, main electrode plate, and electrode mesh, resulting in a short lifespan for the electrolytic cell. Frequent repairs of damaged structural and internal components are required within a short period, significantly increasing long-term maintenance costs. Furthermore, the uneven fluid distribution within the electrolysis chamber due to the fluid entering in a fixed direction leads to decreased electrolysis efficiency.

[0004] Therefore, a flow channel structure for an electrolytic cell is provided to address the shortcomings of existing technologies. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a flow channel structure for an electrolytic cell, which aims to solve the problem of uneven fluid distribution entering the electrolysis chamber, resulting in a decrease in electrolysis efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electrolytic cell flow channel structure, comprising an electrode plate body;

[0008] The electrode body includes several inlets, outlets, and turbulence structures. The inlets to outlets form a fluid direction. The turbulence structure includes a first turbulence unit and a second turbulence unit that are narrower at the top and wider at the bottom. An irregular flow channel is formed between the first turbulence unit and the second turbulence unit. Pulse return channels are formed between the first turbulence unit, the second turbulence unit, and the inner wall of the electrode body, respectively.

[0009] The outlet is located near the irregular flow channel, and the inlet is located between the lower end of the first turbulence unit and the lower end of the second turbulence unit.

[0010] As a further improvement to the technical solution of this utility model, the first turbulence unit and the second turbulence unit are symmetrically arranged.

[0011] An electrolytic cell, adapted to the flow channel structure of the aforementioned electrolytic cell, further includes an electrolysis chamber connected to the outlet.

[0012] As a further improvement to the technical solution of this utility model, it also includes an electrode frame and a common flow channel, wherein the common flow channel is located between the electrode frame and the electrode plate body.

[0013] As a further improvement to the technical solution of this utility model, the common flow channel is connected to the inlet.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In the flow channel structure of this electrolytic cell, fluid enters the irregularly shaped flow channel through the inlet. As the fluid passes through the turbulence structure, due to the Coanda effect, some fluid flows along the wall of the turbulence structure and returns to the vicinity of the inlet through the pulse return channel. Simultaneously, due to the flow-limiting effect of the fluid outlet, some of the fluid entering the pulse return channel returns to the irregularly shaped flow channel, filling separation bubbles. These separation bubbles continuously grow, thus pushing the main flow towards the outlet. This cycle repeats, causing the fluid to periodically oscillate at the outlet, generating a pulsed periodic oscillating jet, thereby achieving a uniform flow effect and solving the problem of fluid impacting the electrolytic cell structure and internal components in a fixed direction for extended periods. The flow channel structure of this electrolytic cell features uniform fluid distribution entering the electrolysis chamber, improving electrolysis efficiency. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 This is a schematic diagram of the flow channel structure of the electrolytic cell of this utility model;

[0018] Figure 2 This is a simulation result diagram of a single flow channel structure in the electrolytic cell of this utility model;

[0019] Figure 3 This is a simulation result diagram of the two flow channel structures in the electrolytic cell of this utility model.

[0020] In the picture:

[0021] 1. Inlet; 2. Outlet; 3. Turbulence structure; 4. Irregular flow channel; 5. Pulse return channel; 6. Polar frame; 7. Common flow channel. Detailed Implementation

[0022] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0023] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "up," "down," "left," and "right" used in this invention are only relative to the relative positional relationships of the various components of the invention in the accompanying drawings.

[0024] Reference Figures 1 to 3 An electrolytic cell flow channel structure, comprising an electrode plate body;

[0025] In one embodiment, the electrode body includes several inlets 1, outlets 2, and turbulence structures 3. The inlets 1 to outlets 2 form a fluid direction. The turbulence structure 3 includes a first turbulence unit and a second turbulence unit that are narrower at the top and wider at the bottom. A shaped flow channel 4 is formed between the first turbulence unit and the second turbulence unit. Pulse return channels 5 are formed between the first turbulence unit, the second turbulence unit, and the inner wall of the electrode body, respectively. The outlet 2 is close to the shaped flow channel 4, and the inlet 1 is close to the area between the lower end of the first turbulence unit and the lower end of the second turbulence unit.

[0026] In this electrolytic cell, fluid enters the irregular flow channel 4 through inlet 1. As the fluid passes through the turbulence structure 3, due to the Coanda effect, some fluid flows along the wall of the turbulence structure 3 and returns to the vicinity of inlet 1 through the pulse return channel 5. Simultaneously, due to the flow-limiting effect of the fluid outlet 2, some of the fluid entering the pulse return channel 5 returns to the irregular flow channel, filling separation bubbles. These separation bubbles continuously grow, pushing the main flow towards outlet 2. This cycle repeats, causing the fluid to periodically oscillate at outlet 2, generating a pulsed periodic oscillating jet, thus achieving a uniform flow effect and solving the problem of fluid impacting the electrolytic cell structure and internal components in a fixed direction for extended periods. The flow channel structure of this electrolytic cell features uniform fluid distribution within the electrolysis chamber, improving electrolysis efficiency.

[0027] Pulsed periodic oscillating jets have the characteristics of discontinuity, periodicity and oscillation, which can significantly enhance the impact force and coverage of the jet.

[0028] In one embodiment, the first turbulence unit and the second turbulence unit are arranged symmetrically.

[0029] In one embodiment, the interior of the electrode body can be rectangular or elliptical.

[0030] CFD simulations were performed on this flow channel structure, and the numerical results are shown in the {Minimum / Maximum Value Table}. The fluid exhibits a pulsed oscillating effect under the Coanda effect.

[0031] name Minimum value Maximum value Density [kg / m^3] 11.74 11.97 Temperature [K] 292.65 297.15 Speed ​​[m / s] 0 33.209 Velocity (X) [m / s] -15.404 15.217 Velocity (Y) [m / s] -10.475 33.146 Speed ​​(Z) [m / s] -8.018 7.323 Static pressure [Pa] 999429.7 1007512.2 vorticity [1 / s] 2.35 423752.7 Velocity RRF(X) [m / s] -15.404 15.217 Velocity RRF(Y) [m / s] -10.475 33.146 Speed ​​RRF(Z) [m / s] -8.018 7.323

[0032] An electrolytic cell, suitable for the flow channel structure of the above-mentioned electrolytic cell, further includes an electrolysis chamber, which is connected to the outlet 2.

[0033] In one embodiment, the electrolytic cell further includes an electrode frame 6 and a common flow channel 7, the common flow channel 7 being located between the electrode frame 6 and the electrode plate body.

[0034] In one embodiment, the common flow channel 7 is connected to the inlet 1.

[0035] In one embodiment, refer to Figure 3 As shown, when the oscillating main jet with multiple outlets 2 inside the electrode body enters the electrolysis chamber simultaneously, it greatly increases the uniform distribution of fluid in the electrolysis chamber, further improving electrolysis efficiency and reducing energy consumption.

[0036] Other aspects of the flow channel structure of the electrolytic cell described in this utility model can be found in the prior art and will not be repeated here.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A flow channel structure of an electrolytic cell, characterized by comprising: The electrode plate body comprises several inlets, outlets and turbulence structures, the inlets to the outlets form a fluid direction, the turbulence structures comprise first and second turbulence units in the shape of narrow on top and wide on bottom, the first and second turbulence units form a special-shaped flow channel therebetween, and the first and second turbulence units and the inner wall of the electrode plate body form pulse backflow channels therebetween respectively; The outlets are close to the special-shaped flow channel, and the inlets are close to the lower ends of the first and second turbulence units. The first and second turbulence units are symmetrically arranged.

2. A flow channel structure for an electrolytic cell according to claim 1, wherein The electrolysis cell further comprises an electrolysis cell which is in communication with the outlets.

3. An electrolytic cell adapted for use with the flow channel structure of any one of claims 1-2, characterized by: The electrode frame and the common flow channel are arranged between the electrode frame and the electrode plate body.

4. An electrolytic cell according to claim 3, wherein The common flow channel is in communication with the inlets.

5. An electrolytic cell according to claim 4, wherein ​

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