Electrolysis device and bipolar frame structure

Abstract

The application discloses an electrolysis device and a bipolar frame structure. The electrolysis device comprises a first extrusion plate, a second extrusion plate, a diaphragm, a sealing gasket and at least one bipolar frame. The bipolar frame comprises a frame body, the frame body is formed with a chamber cavity of electrolyte, and the chamber cavity is respectively provided with an inlet part and an outlet part. The bipolar frames are arranged in a laminated manner and fixedly connected. The first extrusion plate is attached to the frame body at the first end of the laminated frame body, and the second extrusion plate is attached to the frame body at the second end of the laminated frame body. The first extrusion plate and the second extrusion plate bear opposite forces, so that the at least one bipolar frame is in airtight connection between the bipolar frames. The first side of the bipolar frame is provided with a first electrode plate, and the second side of the bipolar frame is provided with a second electrode plate. The first electrode plate and the second electrode plate are connected with a power supply and provide current for the electrolyte in the chamber cavity. The chamber cavity is further provided with a dispersion plate, and the dispersion plate shunts the electrolyte in the chamber cavity. The application improves the electrolysis efficiency and is beneficial to the escape of electrolysis gas.

Description

TECHNICAL FIELD

[0001] The application relates to an electrolyte hydrogen production device, in particular to an electrolysis device and a bipolar frame structure. BACKGROUND

[0002] In modern industry, hydrogen is used as an energy carrier and is complementary to electricity in global energy transformation, and can be applied to fuel cell vehicles and related hydrogen refueling stations. Hydrogen can also be used as a raw material and widely applied to the fields of petroleum refining, chemical synthesis and metal refining. Among many hydrogen production methods, alkaline water electrolysis is considered an important development direction for the production of green hydrogen in the future. The electrolysis device for producing green hydrogen as a core equipment has also ushered in a stage of rapid development.

[0003] In the process of water electrolysis for hydrogen production, alkaline water electrolysis is a relatively mature industrial method. With the increase of hydrogen production capacity, the cost of equipment and the cost of electricity operation also increase significantly. Therefore, it is necessary to improve the operation current of the equipment, improve the hydrogen conversion rate of the electrolysis unit, and reduce the cell voltage of the electrolysis unit so that the cost of electricity operation does not increase significantly with the increase of the hydrogen conversion rate. SUMMARY

[0004] In view of the above problems, the application provides an electrolysis device and a bipolar frame structure, which can solve the problems of high cost and low conversion rate in water electrolysis for hydrogen production.

[0005] In a first aspect, the application provides an electrolysis device, comprising: a first extrusion plate, a second extrusion plate and at least one bipolar frame; the bipolar frame comprises a frame body, the frame body forms a chamber cavity for electrolyte, the chamber cavity is respectively provided with an inlet portion and an outlet portion; the bipolar frames are arranged in layers and fixedly connected; the first extrusion plate is attached to the frame body at the first end of the layered frame body, and the second extrusion plate is attached to the frame body at the second end of the layered frame body; the first extrusion plate and the second extrusion plate bear opposite forces, so that the at least one bipolar frame is in airtight connection between each of the bipolar frames;

[0006] The first side of the bipolar frame is provided with a first electrode plate, and the second side of the bipolar frame is provided with a second electrode plate; the first electrode plate and the second electrode plate are connected with a working power supply and provide electrolysis current for the electrolyte in the chamber cavity of the bipolar frame;

[0007] The chamber cavity is also provided with a dispersion plate, which divides the electrolyte in the chamber cavity, makes the concentration of the electrolyte in the chamber cavity uniform, and promotes the release of gas in the electrolyte.

[0008] In some embodiments, the complex electrode frame comprises a frame, a first electrode plate, a second electrode plate, a partition plate, a conductive plate, a dispersion plate, an inlet portion, and an outlet portion; wherein the frame surrounds to form a frame body, the partition plate is laid in the middle of the frame body, the four sides of the partition plate are fixedly connected with the frame body, and the frame body is divided into a first chamber and a second chamber; the first electrode plate is covered on the opening end of the first chamber; and the second electrode plate is covered on the opening end of the second chamber.

[0009] The conductive plate comprises a first conductive plate and a second conductive plate, the first end of the first conductive plate is electrically connected to the first electrode plate, the second end of the first conductive plate is electrically connected to the first side of the partition plate; the first end of the second conductive plate is electrically connected to the second electrode plate, and the second end of the second conductive plate is electrically connected to the second side of the partition plate; wherein the first side and the second side are opposite to each other.

[0010] The first chamber and the second chamber are respectively provided with an inlet portion for flowing in of electrolyte and an outlet portion for flowing out of electrolyte.

[0011] The dispersion plate comprises a first dispersion plate and a second dispersion plate; the first dispersion plate is arranged on one side of the chamber close to the inlet portion; and the second dispersion plate is arranged on one side of the chamber close to the outlet portion.

[0012] In some embodiments, the distance between the first electrode plate and the first side of the partition plate in the complex electrode frame is less than a first set size; and the distance between the second electrode plate and the second side of the partition plate in the complex electrode frame is less than the first set size.

[0013] The outlet diameter of the outlet portion is greater than or equal to the first set size.

[0014] The part of the partition plate in the first chamber close to the outlet portion in the first chamber has a bending portion, the concave part of the bending portion is located in the first chamber, and the convex part of the bending portion is located in the second chamber.

[0015] The part of the partition plate in the second chamber close to the outlet portion in the second chamber has a bending portion, the concave part of the bending portion is located in the second chamber, and the convex part of the bending portion is located in the first chamber.

[0016] In some embodiments, the outlet portion in the first chamber and the outlet portion in the second chamber are respectively arranged at the left and right ends of the third side of the frame body;

[0017] The inlet portion in the first chamber and the inlet portion in the second chamber are respectively arranged at the left and right ends of the fourth side of the frame body; and the third side and the fourth side are opposite to each other.

[0018] The inlet and the outlet in the first chamber are diagonally distributed in the frame; the inlet and the outlet in the second chamber are diagonally distributed in the frame.

[0019] In some embodiments, one end of the first dispersion plate is fixed to the partition plate, and the other end is fixed to the inner side wall of the frame, the first dispersion plate, the partition plate and the side wall of the frame form a containing space, and the electrolyte outlet of the inlet in the chamber is located in the containing space.

[0020] In some embodiments, a plurality of distribution holes are formed on different positions of the dispersion plate.

[0021] In some embodiments, a diaphragm is arranged between the first electrode plate and the second electrode plate of the frame which are stacked.

[0022] In some embodiments, a sealing gasket is arranged at the abutting position of the two frames in the adjacent complex pole frame, and the complex pole frames arranged in layers are sealed by the sealing gasket.

[0023] In the second aspect, the application provides a complex pole frame structure, comprising a frame, a first electrode plate, a second electrode plate, a partition plate, a conductive plate, a dispersion plate, an inlet and an outlet; wherein the frame is formed by surrounding the frame, the partition plate is laid in the middle of the frame, the four sides of the partition plate are fixedly connected with the frame, and the frame is divided into a first chamber and a second chamber; the first electrode plate is arranged at the opening end of the first chamber; the second electrode plate is arranged at the opening end of the second chamber;

[0024] The conductive plate comprises a first conductive plate and a second conductive plate, the first end of the first conductive plate is electrically connected to the first electrode plate, and the second end of the first conductive plate is electrically connected to the first side of the partition plate; the first end of the second conductive plate is electrically connected to the second electrode plate, and the second end of the second conductive plate is electrically connected to the second side of the partition plate; wherein the first side and the second side are opposite to each other.

[0025] The first chamber and the second chamber are respectively provided with an inlet for flowing in of electrolyte and an outlet for flowing out of electrolyte;

[0026] The dispersion plate comprises a first dispersion plate and a second dispersion plate; the first dispersion plate is arranged in the chamber and close to one side of the inlet; the second dispersion plate is arranged in the chamber and close to one side of the outlet; and distribution holes are formed on the first dispersion plate and the second dispersion plate.

[0027] In some embodiments, a distance between the first electrode plate in the polar frame and the second side of the partition plate is less than a first set size; a distance between the second electrode plate in the polar frame and the second side of the partition plate is less than the first set size;

[0028] An outlet caliber of the outlet portion is greater than or equal to the first set size;

[0029] A portion of the partition plate in the first chamber cavity close to an outlet portion in the first chamber cavity has a bending portion, a concave part of the bending portion is located in the first chamber cavity, and a convex part of the bending portion is located in the second chamber cavity;

[0030] A portion of the partition plate in the second chamber cavity close to an outlet portion in the second chamber cavity has a bending portion, a concave part of the bending portion is located in the second chamber cavity, and a convex part of the bending portion is located in the first chamber cavity.

[0031] The technical scheme of the embodiments of the present application sets the dispersion plate at the inlet portion and the outlet portion of the electrolytic device, so that when the electrolyte flows into the electrolytic device through the inlet portion, the liquid concentration of each part in the chamber of the electrolytic device is uniform, which is more conducive to the electrolysis of the electrolyte and improves the electrolysis efficiency. The outlet portion can separate the gas-liquid in the electrolytic device through the dispersion plate, so that most of the gas in the electrolyte flows out through the outlet portion under the action of the dispersion plate, improving the gas escape efficiency of the electrolyte. In addition, the outlet caliber of the outlet portion in the embodiments of the present application is large, which can guide the gas-liquid mixture in the electrolytic device to flow out through the outlet portion, thereby promoting the stable circulation of the electrolyte and accelerating the gas escape in the electrolyte. The chamber in the electrolytic device of the embodiments of the present application is shallow, the overall volume is small, and the processing cost is saved.

[0032] The above description is only a summary of the technical scheme of the present application. In order to more clearly understand the technical means of the present application, the embodiments can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0033] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to depict only preferred embodiments of the application, and therefore should not be considered to limit the scope of the application in any way. Furthermore, in the accompanying drawings, the same numbers represent the same elements throughout several figures.

[0034] Figure 1 The overall structure schematic diagram of the electrolytic device provided by an embodiment of the present application is shown;

[0035] Figure 2A structural schematic diagram of a polar frame is shown in an embodiment of the present application.

[0036] Figure 3 A partial structural schematic diagram of a polar frame is shown in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0039] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0040] In this paper, the phrase "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0042] In the description of the embodiments of the present application, the term "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0043] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0045] At present, in the hydrogen production technology, the main methods are coal hydrogen production and natural gas hydrogen production technologies. Compared with the former two, the cost of alkaline water hydrogen production has a great price disadvantage, so reducing the equipment investment cost and operation cost is the key to improving the alkaline water hydrogen production technology. With the problems of global warming caused by carbon dioxide and other greenhouse gases, and the gradual reduction of non-renewable energy sources such as fossil fuels, alkaline water electrolysis is considered to be one of the most potential hydrogen production technologies.

[0046] For the existing alkaline water electrolysis device, to increase the hydrogen production per unit time, the number of electrolysis units needs to be increased, which is not conducive to reducing the cost. Increasing the operating current density of the electrolysis device can obtain a higher hydrogen production per unit time without increasing the equipment cost. In theory, the higher the current density, the higher the energy consumption, and more seriously, the alkaline water electrolysis device operated at high current density will produce a large amount of gas in the cathode chamber and anode chamber during operation. When the gas escapes slowly, the circulation of the electrolyte becomes poor, when the gas-liquid ratio exceeds 40%, the solution resistance increases significantly, and the bubble escape speed on the electrode surface decreases, the effective area of the electrode plate decreases, which also causes the energy consumption to increase. Therefore, reducing the equipment investment cost, effectively reducing the amount of gas remaining in the solution, reducing the voltage of the electrolysis device and thus reducing the energy consumption of the equipment, is the technical problem to be solved by the embodiments of the present application.

[0047] The embodiment of the present application aims at the above technical problem, by reducing the thickness of the cathode chamber and the anode chamber, ensuring that the gas-liquid ratio in the electrolysis chamber cavity can be controlled within a reasonable range, especially ensuring that the gas-liquid ratio is less than 40%. By reducing the thickness of the cathode chamber and the anode chamber, especially for large-scale electrolysis devices, the equipment floor area can be significantly reduced, and the manufacturing cost of the electrolysis device can be reduced. In addition, in view of the reduction of the thickness of the chamber cavity in the electrolysis device, by setting a special outlet structure, the outlet diameter of the outlet of the electrolysis device is maximized under high current density operating conditions, thereby reducing the gas escape resistance and reducing the gas proportion in the electrolyte.

[0048] The essence of the technical solution of the embodiment of the present application is further illustrated by specific examples.

[0049] Figure 1 The overall structure of the electrolysis device provided by the embodiment of the present application is shown in the schematic diagram as shown in the figure. Figure 1 The electrolysis device of the embodiment of the present application includes a first extrusion plate 100, a second extrusion plate 200 and at least one complex frame 300; the complex frame includes a frame body, the frame body forms a chamber cavity for electrolyte, the chamber cavity is respectively provided with an inlet part 301 and an outlet part 306; the complex frames 300 are arranged in layers and fixedly connected between them; the first extrusion plate 100 is attached to the frame body at the first end of the layered frame body, and the second extrusion plate 200 is attached to the frame body at the second end of the layered frame body; the first end is the left end as shown in the figure, and the second end is the right end as shown in the figure; the first extrusion plate 100 and the second extrusion plate 200 bear opposite forces, so that the complex frames 300 in the at least one complex frame 300 are in airtight connection between each other. Figure 1 Figure 1 The first extrusion plate 100 and the second extrusion plate 200 bear opposite forces, so that the complex frames 300 in the at least one complex frame 300 are in airtight connection between each other.

[0050] The first side of the complex frame 300 is provided with a first electrode plate, and the second side of the complex frame 300 is provided with a second electrode plate; the first electrode plate and the second electrode plate are connected with a working power supply and provide electrolysis current for the electrolyte in the chamber cavity in the complex frame 300;

[0051] The chamber cavity is also provided with a dispersion plate, which divides the electrolyte in the chamber cavity, makes the concentration of the electrolyte in the chamber cavity uniform, and promotes the release of gas in the electrolyte.

[0052] The electrolysis device of the embodiment of the present application can electrolyze different electrolytes, such as caustic soda electrolyte, pure water electrolyte, or sodium chloride electrolyte, etc.

[0053] ​In this embodiment, by providing dispersion plates at both the inlet 301 and the outlet 306 of the electrolysis device, the liquid concentration in various parts of the chamber within the electrolysis device becomes uniform when the electrolyte flows into the device through the inlet, which is more conducive to the electrolysis of the electrolyte and improves the electrolysis efficiency. The outlet 306, through the dispersion plates, can separate the gas and liquid within the electrolysis device, allowing most of the gas in the electrolyte to flow out through the outlet 306 under the action of the dispersion plates, thus improving the gas overflow efficiency of the electrolyte.

[0054] like Figure 1 As shown in the embodiment of the electrolysis apparatus of this application, a sealing gasket is installed at the joint of the two frames of adjacent bipolar frames, and the stacked bipolar frames are sealed by the sealing gasket. Of course, other sealing methods can also be used to seal the joint between the connecting frames of adjacent bipolar frames. Alternatively, the sealing performance between the stacked bipolar frames can be improved by having the first extrusion plate 100 and the second extrusion plate 200 respectively bear opposing external pressures.

[0055] Figure 2 A schematic diagram of the structure of a polypolar frame according to an embodiment of this application is shown, as follows: Figure 2 As shown, the repolar frame in this embodiment includes a side frame 303, a first electrode plate 302, and a second electrode plate ( Figure 2 The structure includes a partition plate 307, a conductive plate 304, a dispersion plate, an inlet 301, and an outlet 306 (not shown in the diagram). The side frame 303 forms a frame. In this embodiment, the side frame 303 is constructed by welding four metal plates, each 40-80mm high, together, forming a rectangular parallelepiped structure. The metal plates can be stainless steel, etc. The partition plate 307 is laid in the middle of the frame, acting as a partition to divide the side frame 303 into two parts, namely, a first chamber and a second chamber. The partition plate 307 is laid in the frame in a manner approximately parallel to the two openings of the side frame 303. To prevent electrolyte leakage, the partition plate 307 is fixed and sealed to the frame on all four sides. As one implementation, the partition plate 307 and the side frame 303 can also be integrally molded. The integrally molded side frame 303 has better sealing performance, ensuring a tight seal between the first chamber and the second chamber, preventing leakage between them. The first electrode plate 302 covers the opening end of the first chamber, and the second electrode plate covers the opening end of the second chamber. The first electrode plate 302... Figure 2 As shown in the image, the second electrode plate is located at the opening on the other side of the side frame 303.

[0056] In this embodiment, the first electrode plate 302 is an anode plate, and correspondingly, the second electrode plate is a cathode plate. The location of the anode or cathode plate is not limited in this embodiment; it can be set according to actual needs. For example, the first electrode plate 302 can also be a cathode plate, and the second electrode plate can be an anode plate, etc.

[0057] The conductive plate includes a first conductive plate 304 and a second conductive plate. Figure 2 (Not shown in the image) The first end of the first conductive plate 304 is electrically connected to the first electrode plate 302, and the second end of the first conductive plate 304 is electrically connected to the first side of the partition plate 307; the first end of the second conductive plate is electrically connected to the second electrode plate, and the second end of the second conductive plate is electrically connected to the second side of the partition plate; wherein the first side and the second side are opposite to each other. The conductive plate 304 is elongated, with one end connected to the partition plate 307 and the other end connected to the electrode plate, serving as both a support plate for the electrode plate and an electrical connection between the two plates. It guides currents of different polarities input from different sides of the partition plate 307 to the first electrode plate and the second conductive plate, thereby enabling the first electrode plate and the second conductive plate to better electrolyze the electrolyte flowing into the chamber. By setting a large number of conductive plates 304 in the chamber, the current is smoothly transmitted to the electrode plate, improving the current carrying capacity of the conductive plates 304 and enhancing the uniformity of the current distribution on the electrode plate, thus improving the electrolysis efficiency of the electrolyte and making the electrolyte distribution in different chambers of the bipolar frame more uniform.

[0058] The first chamber and the second chamber are respectively provided with an inlet 301 for the electrolyte to flow in and an outlet 306 for the electrolyte to flow out; the inlet 301 is provided on one side of the side frame 303, and the outlet 306 is provided on the other side of the side frame 303 opposite to the inlet 301.

[0059] The outlet 306 in the first chamber and the outlet 306 in the second chamber are respectively located at the left and right ends of the third side of the frame; the left and right are... Figure 2 The meaning of this statement is in the direction of the paper and is not intended to limit the structure of the electrolysis apparatus in the embodiments of this application.

[0060] The inlet portion 301 in the first chamber and the inlet portion 301 in the second chamber are respectively located at the left and right ends of the fourth side of the frame; wherein, the third side and the fourth side are opposite to each other. The inlet portion 301 and the outlet portion 306 in the first chamber are diagonally distributed between the frames; the inlet portion and the outlet portion in the second chamber are diagonally distributed between the frames.

[0061] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are merely illustrative and not intended to limit the scope of the application.

[0062] The dispersion plate includes a first dispersion plate 308 and a second dispersion plate 305; the first dispersion plate 308 is disposed in the chamber near the inlet 301; the second dispersion plate 305 is disposed in the chamber near the outlet 306; and the first dispersion plate 308 and the second dispersion plate 305 are provided with liquid separation holes.

[0063] Figure 3 A partial structural schematic diagram of a repolar frame according to an embodiment of this application is shown, as follows: Figure 3 As shown, the distance between the first electrode plate in the bipolar frame and the first side of the partition plate 307 is less than a first predetermined dimension; the distance between the second electrode plate in the bipolar frame and the second side of the partition plate 307 is less than the first predetermined dimension. Here, the first predetermined dimension can be the thickness of the chamber. In this embodiment, the frame thickness of the side frame 303 is 40-80 mm, and after being divided into two parts by the partition plate 307, the thickness of the chamber is approximately 20-40 mm. When the outlet diameter of the outlet portion 306 is greater than or equal to the first predetermined dimension, since the partition plate 307 is provided in the middle of the side frame 303, the outlet portion 306 on the side wall of the chamber will occupy the space of the other chamber. Therefore, in this embodiment, the partition plate 307 is structurally modified. Specifically, the portion of the partition plate 307 in the first chamber near the outlet portion 306 in the first chamber has a bent portion. The concave portion of the bent portion is located in the first chamber, and the convex portion of the bent portion is located in the second chamber.

[0064] The portion of the partition plate 307 in the second chamber near the outlet portion 306 in the second chamber has a bent portion, the concave portion of which is located in the second chamber and the convex portion of which is located in the first chamber.

[0065] like Figure 3 As shown, in Figure 3 In the cross-sectional view, the partition plate 307 is a vertical plate structure at the bottom, while near the outlet 306 of the chamber, the partition plate 307 is offset towards another chamber to make room for the installation of the outlet 306.

[0066] In this embodiment, although the outlet diameter of the outlet portion 306 is greater than or equal to the first set size, it is generally less than twice the first set size. For example, the outlet diameter of the outlet portion 306 can be 1.1 times, 1.2 times, 1.3 times, or 1.4 times the first set size. To increase the gas-liquid flow velocity in the chamber and ensure that the gas can flow smoothly with the liquid, the outlet diameter of the outlet portion 306 is set as large as possible, so that the protrusion of the partition plate does not affect the electrolyte flow and electrolysis efficiency in the other chamber of the bipolar frame.

[0067] As shown in Figure 3 , one end of the first dispersion plate 308 is fixed to the partition plate 307, and the other end is fixed to the inner side wall of the frame body. The first dispersion plate 308, the partition plate 307, and the side wall of the frame body form a containing space, and the electrolyte outlet of the inlet part 301 in the chamber is located in the containing space. Figure 3 The connection structure relationship between the first dispersion plate 308 in the first chamber and the second chamber and the partition plate 307 and the inner side wall of the frame body (the side of the frame body where the inlet part 301 is arranged) is shown in the sectional view.

[0068] As shown in Figure 3 , in the embodiment of the present application, the conductive plate 304 is a metal plate in strip shape. The end connected with the electrode plate is flat, and the part between the partition plate 307 and the electrode plate is an irregular sheet structure. Figure 3 Only one shape structure is shown in , any structure that increases the contact area of the conductive plate 304 with the electrolyte can be used as the conductive plate 304 of the embodiment of the present application. As many conductive plates 304 as possible are arranged between the partition plate 307 and the electrode plate, so as to improve the current-carrying effect of the conductive plate 304 and the uniformity of current distribution, thereby improving the electrolysis efficiency of the electrolysis device of the embodiment of the present application and the production capacity of the electrolysis gas.

[0069] As shown in Figure 3 , different positions on the first dispersion plate 308 and the second dispersion plate 305 are provided with dispersion small holes as distribution holes.

[0070] As shown in Figure 1 and Figure 2 , in the embodiment of the present application, a diaphragm is arranged between the first electrode plate and the second electrode plate of the frame body in the adjacent complex pole frame which are stacked. By arranging the diaphragm between the adjacent complex pole frames, the electrode plates between the complex pole frames of the embodiment of the present application are isolated from each other, all the complex pole frames work in series, and there is no any influence after the single complex pole frame is removed or replaced. The embodiment of the present application reduces the volume of the complex pole frame, so as to arrange more electrolysis devices in the limited space, improve the electrolysis efficiency, and reduce the manufacturing cost of the electrolysis device.

[0071] In the embodiment of the present application, a sealing gasket is installed at the abutting position of the two frame bodies in the adjacent complex pole frame, and the complex pole frames arranged in stack are sealed by the sealing gasket.

[0072] As shown in Figure 1 and Figure 2As shown, the electrolyte enters the chamber cavity of the electrolysis device from the inlet part 301 at the lower part of the electrolysis device. Under the action of direct current, oxygen is generated at the anode plate by electrolysis, and at the same time, the concentration of the electrolyte in the anode chamber decreases. Hydrogen is generated at the cathode plate by electrolysis, and at the same time, the concentration of the electrolyte in the cathode chamber increases. The generated oxygen and the diluted electrolyte, and the hydrogen and the concentrated electrolyte flow out of the chamber cavity from the outlet part 306 at the top of the electrolysis device. Under the condition of high current density operation, a large amount of gas is generated in the cathode chamber and the anode chamber per unit time. In order to ensure the uniformity of the liquid concentration in each part of the chamber cavity in the electrolysis device, the first dispersion plate 308, also called the inlet dispersion plate, is added near the inlet part 301 of the electrolysis device to ensure that the liquid flowing into the electrolysis device is forced to flow through the first dispersion plate 308 to achieve the uniformity of the electrolyte concentration in each part of the chamber cavity. The first dispersion plate 308 has dispersion holes at different positions on the upper part to achieve the shunt of the electrolyte.

[0073] As the electrolysis of the electrolyte proceeds, the gas generated in the electrolysis device flows with the electrolyte liquid to the upper part of the electrolysis device, and the proportion of gas in the upper part of the electrolysis device gradually increases. Therefore, the second dispersion plate 305 is added to the upper part of the electrolysis device to separate the gas-liquid mixture accumulated in the electrolysis device. Most of the gas flows into the outlet part 306 through the space between the second dispersion plate 305 and the partition plate 307 under the dispersion of the second dispersion plate 305, and most of the electrolyte liquid and the gas generated by electrolysis at the position of the second dispersion plate 305 flows to the outlet part 306 through the space between the second dispersion plate 305 and the electrode 302.

[0074] In order to ensure that the gas-liquid mixture formed by the electrolyte of the electrolysis device can smoothly escape from the chamber cavity of the electrolysis device, the outlet part 306 has a large flow area. At the same time, in order to ensure that the electrolyte liquid in the electrolysis device has a high flow rate and that the gas can smoothly flow out of the electrolysis device with the liquid, the depth of the chamber cavity of the electrolysis device should be maintained within a small range. In the present application, the depth of the chamber cavity of the electrolysis device is 20-40 mm. At the same time, the small depth of the chamber cavity of the electrolysis device can also ensure that the electrolysis device has a small floor area. The present application sets the partition plate 307 containing a heterogeneous structure at the installation position of the outlet part 306, and the partition plate 307 is raised to the opposite side of the outlet part 306, which increases the depth of the chamber cavity on one side of the electrolysis device. This can ensure that the flow area of the outlet part 306 can occupy 30%-60% of the thickness of the frame 303. By setting a large outlet passage, the gas-liquid mixture in the chamber cavity of the electrolysis device can be smoothly sent out of the chamber cavity of the electrolysis device, thereby promoting the stable circulation of the electrolyte and accelerating the escape of the electrolysis gas in the electrolyte. At the same time, without affecting the amount of gas on the surface of the electrode, the gas-liquid separation effect is improved.

[0075] The electrolysis apparatus of this application embodiment ultimately maintains the gas-liquid ratio in the electrolysis apparatus at less than 40%.

[0076] In this embodiment of the application, by setting a first dispersion plate 308 at the inlet 301, it is ensured that the electrolyte can enter the chamber of the electrolysis device uniformly, and the consistency of the flow field and concentration field of the electrolyte in each part of the electrolysis device chamber is ensured, and no local flow dead zone will occur.

[0077] By setting a second dispersion plate 305 at the outlet 301, the gas-liquid channel in the upper part of the electrolysis device chamber is divided into two parts, which respectively serve as the flow channels for gas and liquid. This ensures that the gas-liquid ratio in the upper part of the electrolysis device chamber near the electrode plate is less than 40%, thus guaranteeing the effective electrolysis area of ​​the electrode plate and also achieving a preliminary gas-liquid separation effect.

[0078] In this embodiment, by designing a partition plate with an irregular structure, the flow area of ​​the outlet 306 is significantly increased without increasing the overall thickness of the electrolysis device frame. The flow area is increased by approximately 20%-100%. The larger flow area ensures that the gas generated by electrolysis flows out smoothly. The entire channel is mainly occupied by gas, so the gas generated by electrolysis can be quickly and smoothly removed from the inside of the electrolysis device, thereby significantly reducing the gas content inside the electrolysis device.

[0079] like Figure 2 As shown in the embodiments of this application, a complex electrode frame is also described, which includes a side frame 303, a first electrode plate 302, and a second electrode plate ( Figure 2 The structure includes a partition plate 307, a conductive plate 304, a dispersion plate, an inlet 301, and an outlet 306 (not shown in the diagram). The side frame 303 forms a frame. In this embodiment, the side frame 303 is constructed by welding four metal plates, each 40-80mm high, together, forming a rectangular parallelepiped structure. The metal plates can be stainless steel, etc. The partition plate 307 is laid in the middle of the frame, acting as a partition to divide the side frame 303 into two parts, namely, a first chamber and a second chamber. The partition plate 307 is laid in the frame in a manner approximately parallel to the two openings of the side frame 303. To prevent electrolyte leakage, the partition plate 307 is fixed and sealed to the frame on all four sides. As one implementation, the partition plate 307 and the side frame 303 can also be integrally molded. The integrally molded side frame 303 has better sealing performance, ensuring a tight seal between the first chamber and the second chamber, preventing leakage between them. The first electrode plate 302 covers the opening end of the first chamber; the second electrode plate covers the opening end of the second chamber. The first electrode plate 302... Figure 2The second electrode plate is located at the other side opening of the side frame 303.

[0080] In the embodiment, the first electrode plate 302 is an anode plate, and the second electrode plate is a cathode plate. The position of the anode plate or the cathode plate is not limited in the embodiment, and can be set according to actual needs. For example, the first electrode plate 302 can be a cathode plate, and the second electrode plate can be an anode plate.

[0081] The conductive plate includes a first conductive plate 304 and a second conductive plate Figure 2 The first end of the first conductive plate 304 is electrically connected to the first electrode plate 302, and the second end of the first conductive plate 304 is electrically connected to the first side of the partition plate 307. The first end of the second conductive plate is electrically connected to the second electrode plate, and the second end of the second conductive plate is electrically connected to the second side of the partition plate. The first side and the second side are opposite to each other. The conductive plate 304 is in a strip shape, one end of which is connected to the partition plate 307, and the other end is connected to the electrode plate. The conductive plate 304 not only supports the electrode plate, but also is electrically connected to the electrode plate. The conductive plate 304 guides the current of different polarities input from different sides of the partition plate 307 to the first electrode plate and the second electrode plate, respectively, so that the first electrode plate and the second electrode plate can better electrolyze the electrolyte flowing into the chamber. By arranging a large number of conductive plates 304 in the chamber, the current can be smoothly transmitted to the electrode plate, the current-carrying effect of the conductive plate 304 is improved, the uniformity of the current distribution of the electrode plate is improved, and the electrolysis efficiency of the electrolyte is improved.

[0082] The first chamber and the second chamber are respectively provided with an inlet portion 301 for flowing in of the electrolyte and an outlet portion 306 for flowing out of the electrolyte. The inlet portion 301 is arranged on one side of the side frame 303, and the outlet portion 306 is arranged on the other side of the side frame 303 opposite to the inlet portion 301.

[0083] The outlet portion 306 in the first chamber and the outlet portion 306 in the second chamber are respectively arranged at the left and right ends of the first side of the frame body. Left and right are in the direction of the paper surface, and are not limited to the structure of the electrolytic device in the embodiment. Figure 2 Figure 2

[0084] The inlet portion 301 in the first chamber and the inlet portion 301 in the second chamber are respectively arranged at the left and right ends of the second side of the frame body. The first side and the second side are opposite to each other. The inlet portion 301 and the outlet portion 306 in the first chamber are diagonally distributed with respect to the frame body. The inlet portion and the outlet portion in the second chamber are diagonally distributed with respect to the frame body.

[0085] ​The dispersion plate comprises a first dispersion plate 308 and a second dispersion plate 305; the first dispersion plate 308 is arranged in the chamber cavity and close to one side of the inlet part 301; the second dispersion plate 305 is arranged in the chamber cavity and close to one side of the outlet part 306; and the first dispersion plate 308 and the second dispersion plate 305 are provided with distribution holes.

[0086] The complex pole frame structure of the embodiments of the present application can be understood with reference to the related description of the foregoing embodiments, which will not be repeated here.

[0087] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electrolysis device, characterized by, The device comprises a first extrusion plate, a second extrusion plate and at least one polar frame; the polar frame comprises a frame body, the frame body forms a chamber cavity of electrolyte, the chamber cavity is respectively provided with an inlet part and an outlet part; the polar frames are arranged in a stack and fixedly connected; the first extrusion plate is attached to the frame body at the first end of the stacked frame body, and the second extrusion plate is attached to the frame body at the second end of the stacked frame body; the first extrusion plate and the second extrusion plate bear opposite forces, so that the polar frames in the at least one polar frame are tightly connected; a frame is arranged around the frame body, and the thickness of the frame body is 40-80mm; The first side of the polar frame is provided with a first electrode plate, and the second side of the polar frame is provided with a second electrode plate; the first electrode plate and the second electrode plate are connected with a working power supply and provide electrolytic current for the electrolyte in the chamber cavity in the polar frame; The chamber cavity is also provided with a dispersion plate, a plurality of distribution holes are opened at different positions on the dispersion plate, and the dispersion plate comprises a first dispersion plate and a second dispersion plate; the first dispersion plate is arranged on one side of the chamber cavity close to the inlet part; the second dispersion plate is arranged on one side of the chamber cavity close to the outlet part; the dispersion plate distributes the electrolyte in the chamber cavity, so that the concentration of the electrolyte in the chamber cavity is uniform, and the release of gas in the electrolyte is promoted; The device further comprises a partition plate; the partition plate is laid in the middle of the frame body, the partition plate is fixedly connected with the frame body around, and the frame body is divided into a first chamber cavity and a second chamber cavity; the part of the partition plate in the first chamber cavity close to the outlet part of the first chamber cavity has a bending part, the concave part of the bending part is located in the first chamber cavity, and the convex part of the bending part is located in the second chamber cavity; the part of the partition plate in the second chamber cavity close to the outlet part of the second chamber cavity has a bending part, the concave part of the bending part is located in the second chamber cavity, and the convex part of the bending part is located in the first chamber cavity.

2. The electrolytic device of claim 1, wherein The polar frame comprises a frame, a first electrode plate, a second electrode plate, a partition plate, a conductive plate, a dispersion plate, an inlet part and an outlet part; wherein the first electrode plate covers the opening end of the first chamber cavity; the second electrode plate covers the opening end of the second chamber cavity; The conductive plate comprises a first conductive plate and a second conductive plate, the first end of the first conductive plate is electrically connected to the first electrode plate, and the second end of the first conductive plate is electrically connected to the first side of the partition plate; the first end of the second conductive plate is electrically connected to the second electrode plate, and the second end of the first conductive plate is electrically connected to the second side of the partition plate; wherein the first side and the second side are opposite; The first chamber cavity and the second chamber cavity are respectively provided with an inlet part for electrolyte inflow and an outlet part for electrolyte outflow.

3. The electrolytic device of claim 2, wherein, The distance between the first electrode plate and the first side of the partition plate in the polar frame is less than a first set size; the distance between the second electrode plate and the second side of the partition plate in the polar frame is less than the first set size; the first set size is 20-40mm; The outlet caliber of the outlet part is greater than or equal to the first set size.

4. The electrolytic device of claim 3, wherein The outlet part in the first chamber cavity and the outlet part in the second chamber cavity are respectively arranged at the left and right ends of the third side of the frame body; The inlet part in the first chamber cavity and the inlet part in the second chamber cavity are respectively arranged at the left and right ends of the fourth side of the frame body; the third side and the fourth side are opposite; The inlet part and the outlet part in the first chamber cavity are diagonally distributed on the frame body; the inlet part and the outlet part in the second chamber cavity are diagonally distributed on the frame body.

5. The electrolytic device of claim 2, wherein One end of the first dispersion plate is fixed to the partition plate, and the other end is fixed to the inner side wall of the frame body; the first dispersion plate, the partition plate and the side wall of the frame body form a containing space, and the electrolyte outlet of the inlet part in the chamber cavity is located in the containing space.

6. The electrolytic device of claim 4, wherein A diaphragm is arranged between the first electrode plate and the second electrode plate of the frame body in the adjacent complex pole frame.

7. The electrolytic device of claim 4, wherein A sealing gasket is installed at the abutting position of the two frame bodies in the adjacent complex pole frame, and the complex pole frames arranged in layers are sealed through the sealing gasket.

8. A complex polar frame structure, characterized by, The complex pole frame structure comprises a side frame, a first electrode plate, a second electrode plate, a partition plate, a conductive plate, a dispersion plate, an inlet part and an outlet part; wherein the side frame surrounds to form a frame body, the partition plate is laid in the middle of the frame body, and the partition plate is fixedly connected with the frame body around the partition plate, so as to separate the frame body into a first chamber cavity and a second chamber cavity; the part of the partition plate in the first chamber cavity close to the outlet part in the first chamber cavity has a bending part, the concave part of the bending part is located in the first chamber cavity, and the convex part of the bending part is located in the second chamber cavity; the part of the partition plate in the second chamber cavity close to the outlet part in the second chamber cavity has a bending part, the concave part of the bending part is located in the second chamber cavity, and the convex part of the bending part is located in the first chamber cavity; the first electrode plate covers the opening end of the first chamber cavity; the second electrode plate covers the opening end of the second chamber cavity; the thickness of the frame body is 40-80mm; The conductive plate comprises a first conductive plate and a second conductive plate, the first end of the first conductive plate is electrically connected to the first electrode plate, and the second end of the first conductive plate is electrically connected to the first side of the partition plate; the first end of the second conductive plate is electrically connected to the second electrode plate, and the second end of the second conductive plate is electrically connected to the second side of the partition plate; wherein the first side and the second side are opposite; The first chamber cavity and the second chamber cavity are respectively provided with an inlet part for inflow of electrolyte and an outlet part for outflow of electrolyte; The dispersion plate comprises a first dispersion plate and a second dispersion plate; the first dispersion plate is arranged in the chamber cavity close to one side of the inlet part; the second dispersion plate is arranged in the chamber cavity close to one side of the outlet part; and the first dispersion plate and the second dispersion plate are provided with liquid distribution holes.

9. The complex polar frame structure of claim 8, wherein, The distance between the first electrode plate in the polar frame and the first side of the partition plate is less than a first set size; the distance between the second electrode plate in the polar frame and the second side of the partition plate is less than the first set size; the first set size is 20-40 mm; The outlet caliber of the outlet portion is greater than or equal to the first set size.

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