Fluid distribution structure and use thereof

Abstract

The application discloses a fluid distribution structure and application thereof, wherein the fluid distribution structure comprises a plurality of first structure units arranged in the same plane, the length direction of the first structure unit is arranged as the fluid flow direction, the first structure unit is composed of a plurality of second structure units which are continuously arranged and the end portions of which are sequentially connected together, the second structure unit is a spiral structure with parallel ends, and the two second structure units adjacent to each other in the same first structure unit are arranged at an angle of 60-120 degrees. The fluid distribution structure of the embodiment of the application can passively generate vortex flow, increase the disturbance of flow, overcome the viscous resistance of bubbles, reduce the formation of viscous bubble layers, and accelerate the separation of bubbles from the surface of the fluid distribution structure.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electrolytic hydrogen production, and particularly relates to a fluid distribution structure and application thereof. BACKGROUND

[0002] At present, water electrolysis is an important way to produce green hydrogen. The existing mainstream water electrolysis hydrogen production technology mainly includes three types: alkaline water electrolysis hydrogen production, proton exchange membrane (PEM) electrolysis hydrogen production, and high-temperature solid oxide electrolysis (SOEC) hydrogen production. The key core equipment in the electrolytic hydrogen production technology is the electrolytic cell, and the corresponding electrolytic cells for the three electrolytic technologies are alkaline electrolytic cell, proton exchange membrane electrolytic cell and high-temperature solid oxide electrolytic cell.

[0003] The alkaline electrolytic cell usually uses 30% KOH as the electrolyte. After power-on, hydrogen is produced at the anode and oxygen is produced at the cathode. Hydrogen and oxygen gases are produced in the form of bubbles on the electrode, and the volume grows. When the buoyancy of the bubbles is sufficient to overcome their own gravity and adhesion resistance, the bubbles detach from the electrode surface and flow with the electrolyte to the outlet. The process of bubble generation, growth and detachment on the electrode surface is shown in Figs. Figure 1 (a) and (b). However, in the actual electrolysis process, due to the existence of structural resistance and interfacial tension, part of the bubbles adhere to the electrode surface and are difficult to detach, forming a layer of sticky bubble layer, as shown in Fig. Figure 1 (d). The sticky bubble layer covers the electrode surface, greatly reducing the effective area of the electrode and increasing the electrolyte resistance, which will have a significant negative impact on the electrolytic hydrogen production process. The traditional electrolytic cell structure is insufficient to provide sufficient directional disturbance, making it difficult to remove the sticky bubble layer, which to some extent causes the high energy consumption defect of the electrolytic cell at the present stage. Although some studies use external force fields such as ultrasonic waves and magnetic fields to reduce the influence of the bubble layer, additional equipment is required, and active devices are prone to damage with high failure rate. SUMMARY

[0004] Therefore, one object of the present application is to provide a fluid distribution structure. Without the action of external fields such as magnetic fields and ultrasonic waves, when the fluid flows along the length direction of the first structure unit, a vortex flow is passively generated, the disturbance of the flow is increased, the sticky resistance of the bubbles is overcome, the formation of the sticky bubble layer is reduced, and the detachment of the bubbles from the surface of the fluid distribution structure is accelerated.

[0005] Another object of the present application is to provide a passive vortex flow electrode plate.

[0006] Still another object of the present application is to provide an electrolytic cell.

[0007] Still another object of the present application is to provide an electrolytic hydrogen production system.

[0008] To achieve the above object, the first aspect of the present application provides a fluid distribution structure, comprising: a plurality of first structure units arranged in the same plane, the length direction of the first structure units being arranged as the fluid flow direction; the first structure units being composed of a plurality of second structure units arranged continuously and connected together at the end; the second structure units being helical structures with parallel ends; and the adjacent two second structure units in the same first structure unit being arranged at 60-120°.

[0009] The fluid distribution structure of the present application can passively generate vortex flow, increase the turbulence of the flow, overcome the viscous resistance of the bubbles, reduce the formation of the viscous bubble layer, and accelerate the separation of the bubbles from the surface of the fluid distribution structure when the fluid flows along the length direction of the first structure units without the action of external fields such as magnetic field and ultrasonic wave.

[0010] In addition, the fluid distribution structure according to the above embodiments of the present application can have the following additional technical features:

[0011] In some embodiments of the present application, the adjacent two second structure units in the same first structure unit are arranged at 90°.

[0012] In some embodiments of the present application, the second structure unit has a first end face, a second end face, a third end face and a fourth end face; the first end face and the second end face are oppositely arranged, and both the first end face and the second end face are arranged perpendicularly to the length direction of the first structure unit; the first end face and the second end face are arranged in parallel; the first end face and the second end face are connected to the third end face at one end and connected to the fourth end face at the other end; the third end face and the fourth end face are oppositely arranged, and the middle parts of the third end face and the fourth end face are arranged to cross at least once to form the helical structure.

[0013] In some embodiments of the present application, the connection mode of the adjacent two second structure units in the same first structure unit is:

[0014] the first end face of one second structure unit is fixedly connected to the second end face of another second structure unit;

[0015] or, the first end face of one second structure unit is fixedly connected to the first end face of another second structure unit;

[0016] or, the second end face of one second structure unit is fixedly connected to the second end face of another second structure unit.

[0017] In some embodiments of the present application, a space is left between two adjacent first structural units; the space is 1 / 10-1 / 5 of the width of the first structural unit.

[0018] In some embodiments of the present application, the first structural unit contains 2-40 second structural units; the number of the first structural units is between 5-20.

[0019] To achieve the above-mentioned purpose, the second aspect of the embodiments of the present application proposes a passive rotational flow electrode plate comprising the fluid distribution structure of the embodiments of the present application.

[0020] The passive rotational flow electrode plate of the embodiments of the present application, due to containing the fluid distribution structure of the embodiments of the present application, can passively generate rotational flow in the electrolysis chamber under the condition that no external field such as magnetic field and ultrasonic wave is applied when the electrolyte flows along the length direction of the first structural units, increase the turbulence of the flow, overcome the viscous resistance of the bubbles, reduce the formation of the viscous bubble layer, accelerate the detachment of the bubbles from the surface of the passive rotational flow electrode plate, thereby reduce the overpotential of the surface, and improve the electrolysis efficiency.

[0021] To achieve the above-mentioned purpose, the third aspect of the embodiments of the present application proposes an electrolytic cell comprising the fluid distribution structure of the embodiments of the present application.

[0022] The electrolytic cell of the embodiments of the present application, due to containing the fluid distribution structure of the embodiments of the present application, can passively generate rotational flow in the electrolysis chamber under the condition that no external field such as magnetic field and ultrasonic wave is applied when the electrolyte flows along the length direction of the first structural units, increase the turbulence of the flow, overcome the viscous resistance of the bubbles, reduce the formation of the viscous bubble layer, accelerate the detachment of the bubbles from the surface of the passive rotational flow electrode plate, thereby reduce the overpotential of the surface, and improve the electrolysis efficiency.

[0023] In some embodiments of the present application, the electrolytic cell further comprises

[0024] An electrode frame, the opposite sides of the electrode frame are respectively provided with an electrolyte inlet and an electrolyte outlet;

[0025] An electrode plate, the electrode plate is arranged in the electrode frame, and the electrode frame and the electrode plate constitute a liquid storage cavity; the electrode plate comprises an inlet distribution area and a rotational flow area, the inlet distribution area is located between the electrolyte inlet and the rotational flow area, and the rotational flow area is adjacent to the electrolyte outlet; the rotational flow area adopts the fluid distribution structure according to any one of claims 1 to 7, and the first structural units are arranged along the direction from the electrolyte inlet to the electrolyte outlet.

[0026] In some embodiments of the present application, the inlet distribution zone comprises several uniformly distributed cylinders, prisms or hexagonal shells with an included angle of 120°.

[0027] To achieve the above object, the fourth aspect of the present application provides an electrolytic hydrogen production system comprising the electrolytic cell of the present application.

[0028] The electrolytic hydrogen production system of the present application can passively generate vortex flow in the electrolytic cell under the condition that no external field such as magnetic field or ultrasonic wave is applied, when the electrolyte flows along the length direction of the first structural unit, so as to increase the turbulence of the flow, overcome the viscous resistance of the gas bubbles, reduce the formation of the viscous bubble layer, accelerate the detachment of the gas bubbles from the surface of the passive vortex flow electrode plate, thereby reducing the overpotential of the surface, and improving the electrolysis efficiency.

[0029] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0031] Figure 1 is a schematic diagram of the behavior of the product gas bubbles in the electrolytic hydrogen production process, wherein (a) and (b) are the generation-detachment process, and (c) and (d) are the viscous bubble layer.

[0032] Figure 2 is a perspective view of the fluid distribution structure according to an embodiment of the present application.

[0033] Figure 3 is a perspective view of a first structural unit in the fluid distribution structure according to an embodiment of the present application.

[0034] Figure 4 is a perspective view of the electrolytic cell according to an embodiment of the present application.

[0035] Figure 5 is a top view of the electrolytic cell according to an embodiment of the present application.

[0036] Figure 6 is Figure 5 a sectional view at A-A in FIG. 8.

[0037] Figure 7 is Figure 5 a sectional view at C-C in FIG. 8.

[0038] Figure 8 is Figure 5 a sectional view at D-D in FIG. 8.

[0039] Figure 9 is a bottom view of an electrolytic cell according to an embodiment of the present application.

[0040] Figure 10 is a computational fluid simulation result velocity vector diagram of a fluid distribution structure according to an embodiment of the present application when used as an electrode plate for electrolysis of water to produce hydrogen.

[0041] Reference Signs:

[0042] 1 - first structural unit; 2 - second structural unit; 201 - first end face; 202 - second end face; 203 - third end face; 204 - fourth end face; 3 - electrode frame; 4 - electrolyte inlet; 5 - electrolyte outlet; 6 - electrode plate; 601 - inlet distribution area; 602 - cyclone area; 7 - liquid storage cavity. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0044] The fluid distribution structure, electrolytic cell, etc. of the embodiments of the present application are described below in conjunction with the drawings.

[0045] Figure 2 is a perspective view of a fluid distribution structure according to an embodiment of the present application.

[0046] As shown in Figure 2 , the fluid distribution structure of the embodiments of the present application comprises: a plurality of first structural units 1 arranged in the same plane, the length direction of the first structural unit 1 being arranged as the fluid flow direction; the first structural unit 1 being composed of a plurality of second structural units 2 arranged continuously and connected together at the end portions; the second structural unit 2 being a spiral structure with parallel ends arranged at both ends; in the same first structural unit 1, the two adjacent second structural units 2 are arranged at 60-120°.

[0047] The fluid distribution structure of the embodiments of the present application, due to the arrangement of a plurality of first structural units composed of a plurality of spiral structures with parallel ends arranged at both ends, can passively generate vortex flow when the fluid flows along the length direction of the plurality of first structural units without the action of external fields such as magnetic fields and ultrasonic waves, increase the turbulence of the flow, overcome the viscous resistance of the bubbles, reduce the formation of the viscous bubble layer, and accelerate the detachment of the bubbles from the surface of the fluid distribution structure.

[0048] It should be noted that in the present application, the first structure units can be arranged horizontally, vertically or at an angle, as long as they are in the same plane, for example, the first structure units are arranged in a "one" shape in a horizontal plane. The first structure units are arranged parallel to each other, and the angle is not limited, as long as the length direction is consistent with the flow direction of the fluid.

[0049] In the present application, the closer the angle between the two adjacent second structure units in the same first structure unit is to 90°, the better the fluid cyclone effect is; otherwise, the worse it is. As a possible example of the present application, as shown in Figure 2 , the two adjacent second structure units 2 in the same first structure unit 1 are arranged at 90° to ensure uniform cyclone effect.

[0050] In some embodiments, as shown in Figure 3 , the second structure unit 2 has a first end face 201, a second end face 202, a third end face 203 and a fourth end face 204; the first end face 201 and the second end face 202 are oppositely arranged, and both the first end face 201 and the second end face 202 are arranged perpendicular to the length direction of the first structure unit 1; the first end face 201 and the second end face 202 are arranged in parallel; the first end face 201 and the second end face 202 are connected to the third end face 203 at one end and to the fourth end face 204 at the other end; the third end face 203 and the fourth end face 204 are oppositely arranged, and the middle part of the third end face 203 and the fourth end face 204 is arranged at least once to form a spiral structure. As a possible example, in order to ensure that the first end face and the second end face are arranged in parallel, the spiral structure of the second structure unit can be regarded as a flat plate of a cuboid with the above-mentioned first end face, second end face, third end face and fourth end face, and the third end face is rotated clockwise by 180° of the first multiple with the first end face as the reference, while the fourth end face is rotated counterclockwise by 180° of the second multiple, and the first multiple and the second multiple are equal, to form the spiral structure. For example, as shown in Figure 3 , the middle part of the third end face 203 and the fourth end face 204 is arranged once, that is, the second structure unit is a spiral structure formed by rotating the third end face clockwise by 180° and the fourth end face counterclockwise by 180° with the first end face as the reference, and the first end face and the second end face are arranged in parallel.

[0051] In the present application, the connection mode of the adjacent two second structural units 2 in the same first structural unit 1 can be the following three: in some embodiments, the first end surface 201 of one second structural unit 2 is fixedly connected with the second end surface 202 of another second structural unit 2; in other embodiments, the first end surface 201 of one second structural unit 2 is fixedly connected with the first end surface 201 of another second structural unit 2; and in still other embodiments, the second end surface 202 of one second structural unit 2 is fixedly connected with the second end surface 202 of another second structural unit 2. Regardless of which connection mode, the fixed connection mode of the adjacent two second structural units in the same first structural unit can be welding, adhesive bonding, etc.

[0052] In the present application, the material of the second structural unit can be selected from stainless steel, carbon steel, aluminum alloy, etc. As a possible example, the material of the second structural unit is stainless steel.

[0053] In the present application, the height of the spiral structure of the second structural unit refers to the direction perpendicular to the plane where all the first structural units are located. The height of the spiral structure of the second structural unit is related to the size of the fluid flow and the application scenario of the fluid distribution structure of the present application embodiment. Generally speaking, the greater the flow, the higher the height of the spiral structure should be set. However, in some cases, the application scenario also needs to be considered, such as for the distribution of electrolyte in the electrolysis of water to produce hydrogen. Since appropriately reducing the height of the electrolysis cell is beneficial to reducing the ohmic resistance of the solution and improving the electrolysis efficiency, the height of the spiral structure is limited by the height of the electrolysis cell at this time. For example, the height of the general electrolysis cell is within 1 cm, and if the fluid distribution structure of the present application embodiment is used as an electrode plate or part of an electrode plate, the height of the spiral structure should also be within 1 cm.

[0054] In the present application, there can be a gap between the adjacent two first structural units, or there can be no gap. In some embodiments, when there is a gap between the adjacent two first structural units, the gap should not be too large, otherwise under the same flow, more fluid will flow through the gap between the adjacent two first structural units, and the rotational flow effect of the first structural unit of the present application on the fluid will be weakened accordingly. As a possible example, the gap between the adjacent two first structural units 1 is 1 / 10-1 / 5 of the width of the first structural unit, such as 3 / 20. In other embodiments, when there is no gap between the adjacent two first structural units, or when there is no gap between the adjacent two first structural units and they are fixedly connected by welding, adhesive bonding, etc., the rotational flow distribution capability of the fluid can be improved, but the resistance of the fluid flowing through the fluid distribution structure of the present application embodiment is increased accordingly.

[0055] In the present application, the length of the first structural unit can be selected according to the length of the fluid flow path and the application scenario. Generally speaking, the longer the fluid flow path, the longer the first structural unit is needed, and the more the number of the second structural units in the corresponding first structural unit should be. However, in some cases, the application scenario also needs to be considered. For example, for the distribution of electrolyte in the electrolysis of water to produce hydrogen, theoretically, increasing the number of second structural units in the direction of electrolyte flow (i.e. the length direction of the first structural unit) can increase the degree of disturbance of the electrolyte. However, if the number of second structural units is too large, it will cause the hydrogen product to stay for too long, affecting the electrolysis efficiency. Therefore, according to the simulation results, along the direction of electrolyte flow, 2-40 second structural units 2 can be maintained in the same first structural unit 1, such as 10. It should be noted that in actual application, the same or different number of second structural units can be arranged in different first structural units of the fluid distribution structure according to different application scenarios. For example, in some embodiments, the fluid distribution structure is used in a rectangular or square device, and the cross section of the fluid flow is rectangular or square. At this time, the number of second structural units in each first structural unit of the fluid distribution structure is equal. In other embodiments, the fluid distribution structure is used in a circular device, such as the electrolytic cell shown in Figure 4 the figure, then according to the needs, different numbers of second structural units should be arranged in the first structural units at different positions of the fluid distribution structure. For example, the first structural units in the middle contain a larger number of second structural units, while the first structural units at the edges contain a smaller number of second structural units.

[0056] In the present application, the number of first structural units is related to the width of the fluid flow path. The wider the fluid flow path, the more first structural units should be arranged. As a possible example, when the fluid distribution structure of the present application is used for the distribution of electrolyte in the electrolysis of water to produce hydrogen, the number of first structural units 1 is between 5-20, such as 12.

[0057] The working principle (also the design idea) of the fluid distribution structure of the present application is as follows:

[0058] Without adding any external force field, when the fluid enters the fluid distribution structure from one end of the fluid distribution structure, the fluid successively passes through the spiral structures of each second structural unit 2 along the length direction of the first structural unit 1, and a rotational vortex flow is passively generated, which uniformly distributes the fluid and cleans the bubble layer adhering to the surface of the fluid distribution structure. Since there are no stirring, rotating and other moving parts, the complexity of the application equipment (such as electrolytic cell, etc.) of the fluid distribution structure can be greatly reduced, the equipment failure rate can be reduced, and the stability and service life of the use can be improved.

[0059] The fluid distribution structure of the embodiment of the present application can be widely applied to occasions requiring fluid distribution, such as water electrolysis hydrogen production, water treatment, chemical reaction kettle, etc.

[0060] As a possible example, the fluid distribution structure of the embodiment of the present application can be used in a passive cyclone electrode plate in the field of water electrolysis hydrogen production, which can be wholly or partially provided with the fluid distribution structure of the embodiment of the present application. Figure 4 As shown in the electrolytic cell, the passive cyclone electrode plate of the embodiment of the present application can be used, which is composed of an inlet distribution area 601 and a cyclone area 602, wherein the cyclone area 602 is provided with the fluid distribution structure of the embodiment of the present application, and the inlet distribution area 601 includes a plurality of arrayed cylindrical bodies, prisms or hexagonal housings with an included angle of 120°.

[0061] The computational fluid dynamics (CFD) simulation results of the fluid distribution structure of the embodiment of the present application when used as an electrode plate for water electrolysis hydrogen production (electrolyte is 30wt% KOH solution, and the electrode plate is wholly provided with the fluid distribution structure of the embodiment of the present application) are shown in Figure 10 As shown in Figure 10 It can be seen that the fluid distribution structure of the embodiment of the present application can generate high-speed vortex flow on the upper and lower sides, which can effectively promote the separation of the viscous bubble layer on the electrode surface and improve the electrolysis efficiency.

[0062] As a possible example, the fluid distribution structure of the embodiment of the present application can be used in an electrolytic cell (such as an alkaline water electrolysis hydrogen production electrolytic cell) in the field of water electrolysis hydrogen production, which includes the fluid distribution structure of the embodiment of the present application.

[0063] For example, as shown in Figures 4-9 The electrolytic cell of the embodiment of the present application includes an electrode frame 3 and an electrode plate 6; the electrolytic cell is provided with an electrolyte inlet 4 and an electrolyte outlet 5 on opposite sides of the electrode frame 3; the electrode plate 6 is arranged in the electrode frame 3 and forms a liquid storage cavity 7 with the electrode frame 3; the electrode plate 6 includes an inlet distribution area 601 and a cyclone area 602, the inlet distribution area 601 is located between the electrolyte inlet 4 and the cyclone area 602, and the cyclone area 602 is adjacent to the electrolyte outlet 5; the cyclone area 602 is provided with the fluid distribution structure of the embodiment of the present application, and the first structure unit 1 is arranged along the direction from the electrolyte inlet 4 to the electrolyte outlet 5.

[0064] The electrolytic cell of the embodiment of the present application, due to containing the fluid distribution structure of the embodiment of the present application, when the electrolyte flows along the length direction of the first structure unit without the action of external fields such as magnetic fields and ultrasonic waves, can passively generate vortex flow inside the electrolysis chamber, increase the turbulence of the flow, overcome the viscous resistance of the bubbles, reduce the formation of the viscous bubble layer, accelerate the separation of the bubbles from the passive cyclone electrode plate surface, thereby reducing the overpotential of the surface, and improving the electrolysis efficiency.

[0065] In the present application, the shape of the electrode frame is not limited, which can be cylindrical, cubic, etc.; the setting position of the electrode frame is also not limited, which can be horizontal setting, vertical setting, etc. In some embodiments, the electrode frame adopts a cylindrical shell structure with one side open, the electrolyte inlet and the electrolyte outlet are both arranged on the open side of the electrode frame, and the electrolyte inlet and the electrolyte outlet are both in communication with the liquid storage cavity. As a possible example, the electrode frame is composed of a ring-shaped cylinder and a bottom plate; the bottom plate is arranged at the bottom of the ring-shaped cylinder and is welded with the ring-shaped cylinder; the electrolyte inlet and the electrolyte outlet are arranged at the top of the ring-shaped cylinder and are both in communication with the liquid storage cavity; and the electrode plate is arranged in the ring-shaped cylinder and is arranged in parallel with the bottom plate.

[0066] In the present application, the main purpose of arranging the inlet distribution area structure is to quickly and uniformly distribute the electrolyte at the inlet in the horizontal cross section (in the direction perpendicular to the flow direction of the electrolyte), reduce the velocity gradient in the horizontal direction (in the direction perpendicular to the flow direction of the electrolyte), and improve the uniformity of the fluid flow inside the electrolysis unit. Optionally, the inlet distribution area 601 includes a plurality of uniformly distributed cylindrical bodies, prisms or hexagonal shells with an included angle of 120°. Among them, as a possible example, the prism can select a four-prism with a rhombic cross section; as another possible example, the hexagonal shell with an included angle of 120° can select the three-dimensional structure unit with an included angle of 120° between the two ends of the first bending part and the second bending part in Chinese patent application 202210743324.9 (invention name: a three-dimensional corrugated net plate and a processing method thereof and an electrolytic cell).

[0067] Optionally, in some embodiments, the plurality of uniformly distributed cylindrical bodies, prisms or hexagonal shells with an included angle of 120° are densely arranged, for example: the distance between the adjacent two cylindrical bodies, prisms or hexagonal shells with an included angle of 120° is kept between 2-10mm, such as 6mm.

[0068] In some embodiments, the plurality of uniformly distributed cylindrical bodies, prisms or hexagonal shells with an included angle of 120° are all arranged vertically with the bottom of the electrode frame.

[0069] Optionally, in some embodiments, all first structural units of the cyclone zone 602 are fixedly connected to the bottom of the electrode frame by welding or the like, and the bottoms of the cylindrical bodies, prismatic bodies or hexagonal housings with an included angle of 120 degrees of the inlet distribution zone are fixedly connected to the bottom of the electrode frame by welding or the like.

[0070] Taking the case that the electrode frame is horizontally arranged and the electrolyte inlet and the electrolyte outlet are both at the top of the electrode frame as an example, the working principle of the electrolytic cell of the embodiment of the present application is as follows:

[0071] Without the action of external fields such as magnetic fields and ultrasonic waves, the electrolyte (such as a 30wt% KOH solution) enters the liquid storage cavity 7 from the electrolyte inlet 4, is first rapidly and uniformly distributed in the horizontal cross section through the inlet distribution zone 601, reduces the horizontal velocity gradient, and improves the uniformity of the electrolyte flow in the electrolytic unit; then the electrolyte enters the cyclone zone 602, sequentially passes through the spiral structures of each second structural unit 2 along the length direction of the plurality of first structural units 1, and passively generates a cyclone vortex, thereby being uniformly distributed while cleaning the bubble layer adhering to the surface of the cyclone zone, reducing the aggregation of bubbles into a bubble layer on the electrode surface, reducing the electrolysis overpotential, and improving the electrolysis efficiency. Since there are no moving parts such as stirring and rotation, the arrangement of the cyclone zone can greatly reduce the complexity of the electrolytic cell, reduce the equipment failure rate, and improve the stability and service life of use.

[0072] The electrolytic hydrogen production system of the embodiment of the present application comprises the electrolytic cell of the embodiment of the present application and has the beneficial effects of the electrolytic cell of the embodiment of the present application.

[0073] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0074] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0075] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", "fixedly connected", "connection", "fixedly connected", "connected", "fixed", and the like should be construed broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0077] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0078] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A fluid distribution structure, characterized by, Comprise: A plurality of first structural units arranged in the same plane, the length direction of the first structural unit is arranged as the fluid flow direction; the first structural unit is composed of a plurality of second structural units arranged continuously and connected together in sequence at the end; the second structural unit is a spiral structure with parallel ends; in the same first structural unit, the adjacent two second structural units are arranged at 60-120°; The second structural unit has a first end face, a second end face, a third end face and a fourth end face; the first end face and the second end face are oppositely arranged, and the first end face and the second end face are both arranged perpendicular to the length direction of the first structural unit; the first end face and the second end face are arranged in parallel; the first end face and the second end face are both connected to the third end face at one end and connected to the fourth end face at the other end; the third end face and the fourth end face are oppositely arranged; The spiral structure is a spiral structure composed of a cuboid flat with the first end face, the second end face, the third end face and the fourth end face, the third end face rotating clockwise by the first multiple of 180°, and the fourth end face rotating counterclockwise by the second multiple of 180°, taking the first end face as the reference; the first multiple and the second multiple are equal.

2. The fluid distribution structure of claim 1, wherein, In the same first structural unit, the adjacent two second structural units are arranged at 90°.

3. The fluid distribution structure of claim 1, wherein, The middle part of the third end face and the fourth end face is arranged at least once to form the spiral structure.

4. The fluid distribution structure according to claim 3, wherein, In the same first structural unit, the connection mode of the adjacent two second structural units is: The first end face of one second structural unit is fixedly connected with the second end face of another second structural unit; Or, the first end face of one second structural unit is fixedly connected with the first end face of another second structural unit; Or, the second end face of one second structural unit is fixedly connected with the second end face of another second structural unit.

5. The fluid distribution structure of claim 1, wherein, A space is left between the adjacent two first structural units; the space is 1 / 10-1 / 5 of the width of the first structural unit.

6. The fluid distribution structure of claim 1, wherein, The first structural unit contains 2-40 second structural units; the number of the first structural unit is between 5-20.

7. A passive spin-flow electrode plate characterized by, The fluid distribution structure according to any one of claims 1 to 6.

8. An electrolytic cell characterized by, The fluid distribution structure according to any one of claims 1 to 6.

9. The electrolytic cell of claim 8, wherein, Further comprising An electrode frame, opposite sides of the electrode frame are respectively provided with an electrolyte inlet and an electrolyte outlet; An electrode plate is arranged in the electrode frame, and the two constitute a liquid storage cavity; the electrode plate comprises an inlet distribution area and a cyclone area, the inlet distribution area is located between the electrolyte inlet and the cyclone area, and the cyclone area is adjacent to the electrolyte outlet; the cyclone area adopts the fluid distribution structure according to any one of claims 1 to 7, and the first structural unit is arranged in the direction from the electrolyte inlet to the electrolyte outlet.

10. The electrolytic cell of claim 9, wherein, The inlet distribution area (601) comprises a plurality of uniformly distributed cylindrical bodies, prisms or hexagonal shells with an included angle of 120°.

11. An electrolytic hydrogen production system, characterized by, The electrolytic cell according to any one of claims 8 to 10.

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