Energy-saving seawater hydrogen production device

Abstract

The application discloses an energy-saving seawater hydrogen production device, which comprises an electrolytic cell, an oxygen separator and a hydrogen separator. An anode assembly and a cathode assembly are arranged in the electrolytic cell. The anode assembly comprises an anode sheet and a first gas collecting cylinder, and the cathode assembly comprises a cathode sheet and a second gas collecting cylinder. The surface of the cathode sheet is loaded with an active component, and the active component comprises one or more of nickel and molybdenum. The inner side wall of the first gas collecting cylinder and the second gas collecting cylinder is provided with blades. The blades rotate the first gas collecting cylinder and the second gas collecting cylinder, so that the electrolyte in the first gas collecting cylinder and the second gas collecting cylinder forms a rotating upward vortex, and the electrolyte outside the first gas collecting cylinder and the second gas collecting cylinder is uniformly sucked from the openings. The application can improve the hydrogen production efficiency, realize function reduction, and effectively separate the produced oxygen and hydrogen.

Description

TECHNICAL FIELD

[0001] The application relates to the field of electrolytic hydrogen production, in particular to an energy-saving seawater hydrogen production device. BACKGROUND

[0002] The principle of electrolytic hydrogen production is to use direct current to decompose water, convert electrical energy into chemical energy of hydrogen, and the core process is as follows: in an electrolytic cell, water contacts two electrodes (cathode and anode) and direct current is applied:

[0003] Cathode (negative electrode): water molecules obtain electrons and decompose into hydrogen and hydroxyl ions (alkaline environment);

[0004] Anode (positive electrode): hydroxyl ions lose electrons and decompose into oxygen and water (alkaline environment). Then, through a diaphragm or ion exchange membrane (such as a proton exchange membrane) in the electrolytic cell, the hydrogen generated in the cathode and the oxygen generated in the anode can be isolated and collected separately. In the process of electrolytic hydrogen production, a large amount of electrical energy is consumed. How to improve the efficiency of electrolytic hydrogen production and reduce the energy consumption of electrolysis is a technical problem that the industry has been concerned about.

[0005] Moreover, the hydrogen-oxygen mixture has a volume ratio of 4%-75% and is prone to explosion. Therefore, effective separation of the produced hydrogen and oxygen is a basic guarantee for the safe implementation of electrolytic hydrogen production.

[0006] In an alkaline electrolytic cell, a diaphragm is used to separate the electrolyte to separate hydrogen and oxygen. The structure is as follows: the electrolytic cell is filled with alkaline electrolyte (such as 30% KOH solution), and a porous diaphragm (traditionally made of asbestos, now mostly modified diaphragm such as polysulfone, polypropylene, etc.) is arranged between the cathode and the anode. The diaphragm has hydrophilicity and ion conductivity, allowing OH⁻ (hydroxyl ion) in the electrolyte to pass through, maintaining the charge balance between the cathode and the anode. At the same time, the porous structure of the diaphragm has small pore size and is soaked in the electrolyte, forming a "liquid seal" effect to prevent hydrogen and oxygen from diffusing and mixing through the diaphragm (the solubility of gas in liquid is low, and the blocking effect of the diaphragm is significant). Hydrogen gas is discharged from the gas outlet of the cathode area, and oxygen gas is discharged from the gas outlet of the anode area, achieving separation. In this technical solution, a diaphragm needs to be arranged between the cathode and the anode, and a large amount of diaphragm is required. The diaphragm needs to be regularly maintained to prevent aging and damage, which may cause gas mixing, and it is difficult to detect diaphragm damage, thereby greatly increasing the difficulty of maintenance. SUMMARY

[0007] In view of the above problems, the application provides an energy-saving seawater hydrogen production device to solve the technical problems of high energy consumption and high difficulty in hydrogen-oxygen separation in the above hydrogen production.

[0008] To achieve the above purpose, the application provides an energy-saving seawater hydrogen production device, which comprises:

[0009] The electrolytic tank is internally provided with salty electrolyte, multiple sets of anode assemblies and multiple sets of cathode assemblies, the anode assembly comprises anode sheet and first gas collecting cylinder, the cathode assembly comprises cathode sheet and second gas collecting cylinder; the surface of the cathode sheet is loaded with active component, the active component comprises one or more of nickel and molybdenum;

[0010] The first gas collecting cylinder and the second gas collecting cylinder are bottom-opened and top-closed tubular structures, the anode sheet is arranged inside the first gas collecting cylinder, the cathode sheet is arranged inside the second gas collecting cylinder, the inside of the side wall of the first gas collecting cylinder and the second gas collecting cylinder is provided with vane, the top of the first gas collecting cylinder and the second gas collecting cylinder is connected with driving device;

[0011] During electrolysis, the first gas collecting cylinder and the second gas collecting cylinder are driven to rotate axially by the driving device, the vane forms rotating upward vortex of electrolyte in the first gas collecting cylinder and the second gas collecting cylinder, and uniformly sucks electrolyte outside the first gas collecting cylinder and the second gas collecting cylinder from the opening; the top of the first gas collecting cylinder is further provided with first suction pipe; the top of the second gas collecting cylinder is further provided with second suction pipe;

[0012] Oxygen separator is arranged outside the electrolytic tank, and is connected with each first suction pipe through first manifold pipe, and is used for sucking electrolyte at the top of the first gas collecting cylinder to outside the electrolytic tank and separating oxygen in the electrolyte;

[0013] Hydrogen separator is arranged outside the electrolytic tank, and is connected with each second suction pipe through second manifold pipe, and is used for sucking electrolyte at the top of the second gas collecting cylinder to outside the electrolytic tank and separating hydrogen in the electrolyte.

[0014] Further, the oxygen separator is connected with the electrolytic tank through first return pipe, and is used for returning electrolyte after oxygen separation to the electrolytic tank;

[0015] The hydrogen separator is connected with the electrolytic tank through second return pipe, and is used for returning electrolyte after hydrogen separation to the electrolytic tank.

[0016] Further, it further comprises modulation pool, which is used for collecting electrolyte discharged by the first return pipe and the second return pipe, and returning to the electrolytic tank after pH modulation.

[0017] Further, the first gas collecting cylinder and the second gas collecting cylinder are arranged in pairs;

[0018] The top of the first gas collecting cylinder and the second gas collecting cylinder is respectively provided with hollow transmission shaft; the top of the hollow transmission shaft is provided with driving wheel; the first gas collecting cylinder and the second gas collecting cylinder are connected with driving device through the hollow transmission shaft and the driving wheel;

[0019] The first suction pipe and the second suction pipe are both externally extended into the first gas collecting cylinder and the second gas collecting cylinder through the hollow transmission shaft.

[0020] Further, the suction end of the first suction pipe and the second suction pipe is respectively provided with a liquid level sensor for detecting the electrolyte level; when the liquid level sensor cannot detect the electrolyte, the driving device increases the rotation speed of the corresponding first gas collecting cylinder or second gas collecting cylinder.

[0021] Further, the first gas collecting cylinder is internally provided with two or more mutually parallel anode sheets, and the second gas collecting cylinder is internally provided with two or more mutually parallel cathode sheets; the diameter of the first gas collecting cylinder and the second gas collecting cylinder is greater than or equal to 0.8 meters, the height is greater than 1 meter, and the rotation speed is less than 70 revolutions per minute.

[0022] Further, the top and bottom of the inner side of the side wall of the first gas collecting cylinder and the second gas collecting cylinder are both provided with the blade.

[0023] Further, in the active component, the molar ratio of nickel to molybdenum is 1:0.5 to 1:2.

[0024] Further, the oxygen separator and the hydrogen separator are cyclone separators or membrane gas-liquid separators.

[0025] Further, the top of the first gas collecting cylinder is further provided with an oxygen collecting pipe, and the top of the second gas collecting cylinder is further provided with a hydrogen collecting pipe.

[0026] Unlike the prior art, in the above technical solution, the surface of the cathode sheet is loaded with an active component, and the active component includes nickel or molybdenum, which is a high-efficiency and stable cathode hydrogen production catalytic electrode, which can improve the electrolysis efficiency and reduce the electrolysis energy consumption. And a first gas collecting cylinder is arranged on the outer periphery of the anode sheet, and a second gas collecting cylinder is arranged on the outer periphery of the cathode; the first gas collecting cylinder and the second gas collecting cylinder can collect the oxygen and hydrogen generated by electrolysis, and the side wall of the first gas collecting cylinder and the second gas collecting cylinder is provided with a blade, the blade rotates synchronously with the first gas collecting cylinder and the second gas collecting cylinder, so that the electrolyte in the first gas collecting cylinder and the second gas collecting cylinder forms a rotating upward vortex, and the electrolyte outside the first gas collecting cylinder and the second gas collecting cylinder is uniformly sucked from the opening, thereby preventing the electrolyte in the first gas collecting cylinder and the second gas collecting cylinder from overflowing, avoiding the diffusion and mixing of oxygen and hydrogen, and the electrolyte in the first gas collecting cylinder and the second gas collecting cylinder is pumped out of the electrolysis tank for hydrogen-oxygen separation. This technical solution can effectively separate oxygen and hydrogen without using a diaphragm, greatly improving the convenience and reliability of hydrogen-oxygen separation.

[0027] The above summary related to the invention is only a summary of the technical solutions of the present application. In order to enable those skilled in the art to more clearly understand the technical solutions of the present application, further implement the contents recorded in the specification and drawings, and enable the above and other purposes, characteristics and advantages of the present application to be more easily understood, the following will be described in combination with the specific embodiments of the present application and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings are only used to show the principles, implementation manners, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and cannot be considered as limitations of the present application.

[0029] In the drawings of the specification:

[0030] Figure 1 Structure diagram of the energy-saving seawater hydrogen production device according to the specific embodiments;

[0031] Figure 2 Structure diagram of the first gas collecting cylinder according to the specific embodiments;

[0032] Figure 3 Connection diagram of the oxygen separator according to the specific embodiments;

[0033] Figure 4 is Figure 2 Local enlarged view of part A in the figure;

[0034] The reference signs involved in the above drawings are explained as follows:

[0035] 1, electrolytic cell; 2, electrode assembly; 20, first gas collecting cylinder; 21, anode assembly; 22, cathode assembly;

[0036] 3, oxygen separator; 31, first flow collecting pipe; 32, first flow returning pipe; 33, oxygen discharging pipe; 34, first circulating pump;

[0037] 4, hydrogen separator; 41, second flow collecting pipe; 42, second flow returning pipe; 43, hydrogen discharging pipe; 44, second circulating pump;

[0038] 211, anode sheet; 201, blade; 202, hollow transmission shaft; 203, driving wheel; 311, first suction pipe; 312, oxygen collecting pipe; 313, liquid level sensor;

[0039] 5, modulation pool; DETAILED DESCRIPTION

[0040] In order to explain the possible application scenarios, technical principles, specific implementation schemes, and the purposes and effects of the present application in detail, the following will be described in detail in combination with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, but cannot limit the protection scope of the present application.

[0041] In this paper, the term "embodiment" means that the specific features, structures or properties described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0042] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0043] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this paper generally represents that the associated objects before and after are a kind of "or" logical relationship.

[0044] In the present application, the terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0045] In the present application, without more limitation, the "includes", "contains", "has" or other similar open expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent to such process, method or product.

[0046] As the same as the understanding in the "Examination Guidelines", in the present application, "greater than", "less than", "exceed" and the like are understood as not including the number; "above", "below", "within" and the like are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is two or more (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly specified.

[0047] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0048] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be broadly understood. For example, the "connection" can be fixed connection, or detachable connection, or integral setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] Please refer to Figures 1 to 4 The present embodiment provides an energy-saving seawater hydrogen production device, which is used for electrolyzing seawater to produce hydrogen and oxygen. The energy-saving seawater hydrogen production device improves the cathode sheet, which can improve the corrosion resistance and hydrogen production efficiency of the cathode sheet, thereby improving the electrolysis efficiency and reducing the electrolysis energy consumption; and improves the hydrogen-oxygen separation scheme, which improves the hydrogen-oxygen separation efficiency and effectively avoids hydrogen-oxygen mixing without using a diaphragm.

[0050] As Figure 1As shown, the energy-saving seawater hydrogen production device includes an electrolytic cell 1, an oxygen separator 3 and a hydrogen separator 4. Among them, the electrolytic cell 1 is provided with an electrode assembly 2 for electrolyzing electrolyte to produce oxygen and hydrogen, and the oxygen separator 3 and the hydrogen separator 4 are arranged outside the electrolytic cell 1 for separating hydrogen and oxygen in the electrolyte. The electrolyte is seawater, which is pretreated by filtering, desalting, softening and adjusting pH before electrolysis. Through filtering (such as sand filtering, ultrafiltration), impurities such as silt and algae are removed to prevent equipment from being blocked; desalination uses reverse osmosis, electrodialysis and other methods to reduce salt concentration, reduce Cl⁻ in the anode to generate chlorine, and avoid equipment corrosion; softening can prevent scaling on the surface of the electrode and the membrane, and maintain the electrolysis efficiency; by adjusting the pH, the seawater can be made alkaline, which can optimize the ion conductivity of the electrolyte and inhibit the electrolysis side reaction.

[0051] As shown in Figure 1 The electrolytic cell 1 is provided with a plurality of electrode assemblies 2, which include a plurality of anode assemblies 21 and a plurality of cathode assemblies 22. The anode assemblies 21 and the cathode assemblies 22 are immersed in the pretreated seawater (i.e. the salty electrolyte). During electrolysis, the anode assemblies are connected to the positive electrode of the power supply, and the cathode assemblies are connected to the negative electrode of the power supply. The voltage is 2.0-3.0V, and the current is determined according to the volume and shape of the electrolytic cell 1, with a current density of 0.5-2A / cm².

[0052] During electrolysis, the hydroxyl ions on the surface of the anode assembly 21 lose electrons and decompose into oxygen and water; the water molecules on the surface of the cathode assembly gain electrons and decompose into hydrogen and hydroxyl ions.

[0053] In this embodiment, the structure of the anode assembly 21 and the cathode assembly 22 is improved, and a corresponding gas collecting cylinder is added, i.e. the anode assembly includes an anode sheet 211 and a first gas collecting cylinder 20, and the cathode assembly includes a cathode sheet and a second gas collecting cylinder. The first gas collecting cylinder 20 is used to collect the oxygen generated by the electrolysis of the anode sheet 211, and to physically separate the electrolyte near the anode sheet 211 from the other electrolyte in the electrolytic cell 1, and the electrolyte can only enter from the bottom opening; similarly, the second gas collecting cylinder is used to collect the hydrogen generated by the electrolysis of the cathode sheet, and to physically separate the electrolyte near the cathode sheet from the other electrolyte in the electrolytic cell 1.

[0054] In this embodiment, the cathode sheet is improved, and an active component is loaded on the surface of the cathode sheet, which includes one or more of nickel and molybdenum; wherein the molar ratio of nickel to molybdenum in the active component is 1:0.5 to 1:2. In this embodiment, the active component includes nickel or molybdenum, which can improve the electrolysis efficiency and reduce the energy consumption of electrolysis, thereby achieving the purpose of energy saving.

[0055] As shown in Figure 1 and Figure 2As shown, in the present embodiment, the first gas collecting cylinder 20 and the second gas collecting cylinder are bottom-open and top-closed tubular structures, the anode sheet is arranged inside the first gas collecting cylinder 20, the cathode sheet is arranged inside the second gas collecting cylinder, the inside of the side wall of the first gas collecting cylinder 20 and the second gas collecting cylinder is provided with a vane 201, and the top of the first gas collecting cylinder 20 and the second gas collecting cylinder is connected with a driving device. The top of the first gas collecting cylinder 20 and the second gas collecting cylinder is rotatably mounted on the top of the electrolytic cell 1 through a rotating bearing, and the first gas collecting cylinder 20 and the second gas collecting cylinder are provided with a hollow transmission shaft 202, and the driving device can be a motor, which is drivingly connected with the hollow transmission shaft 202 at the top of the first gas collecting cylinder 20 and the second gas collecting cylinder through a gear or a belt, so as to drive the first gas collecting cylinder 20 and the second gas collecting cylinder to rotate.

[0056] During electrolysis, the first gas collecting cylinder 20 and the second gas collecting cylinder are driven to rotate axially by the driving device, the vane 201 causes the electrolyte in the first gas collecting cylinder 20 and the second gas collecting cylinder to form a rotating upward vortex, and the electrolyte outside the first gas collecting cylinder 20 and the second gas collecting cylinder is uniformly sucked from the opening. Figure 2 As shown, the dashed arrow represents the rotating direction of the electrolyte vortex inside the first gas collecting cylinder 20, and the solid arrow represents the electrolyte suction direction at the bottom opening of the first gas collecting cylinder 20. The top of the first gas collecting cylinder 20 is further provided with a first suction pipe 311, and the top of the second gas collecting cylinder is further provided with a second suction pipe.

[0057] An oxygen separator 3 is arranged outside the electrolytic cell 1 and is connected with each first suction pipe 311 through a first manifold 31, and the oxygen separator 3 is used to draw the electrolyte at the top of the first gas collecting cylinder 20 to the outside of the electrolytic cell 1 and separate the oxygen in the electrolyte. A hydrogen separator 4 is arranged outside the electrolytic cell 1 and is connected with each second suction pipe through a second manifold 41, and the hydrogen separator 4 is used to draw the electrolyte at the top of the second gas collecting cylinder to the outside of the electrolytic cell 1 and separate the hydrogen in the electrolyte. A first circulating pump 34 is arranged between the oxygen separator 3 and the first manifold 31, and the first circulating pump 34 is used to pump the electrolyte into the oxygen separator 3. A second circulating pump 44 is arranged between the hydrogen separator 4 and the second manifold 41, and the second circulating pump 44 is used to pump the electrolyte into the hydrogen separator 4.

[0058] The oxygen separator 3 is provided with an oxygen discharge pipe 33 for conveying the separated oxygen to an oxygen storage bottle, and the hydrogen separator 4 is provided with a hydrogen discharge pipe 43 for conveying the separated hydrogen to a hydrogen storage bottle.

[0059] The oxygen separator 3 and the hydrogen separator 4 are cyclone separators or membrane gas-liquid separators. The cyclone separator is a vertical cylindrical structure with a tangential inlet and a central exhaust pipe. The electrolyte enters along the tangent of the cylinder, and the centrifugal force causes the liquid to be thrown against the wall and flow down, and the gas is gathered in the center and discharged from the top. The membrane separator is provided with a hydrophobic porous membrane. The liquid cannot pass through the hydrophobic porous membrane, and the gas is separated by diffusion through the membrane holes. The membrane separator has a compact structure and works by selective permeation of the membrane to achieve gas-liquid separation.

[0060] In the present embodiment, the vanes 201 are arranged in the first gas collecting cylinder 20 and the second gas collecting cylinder to reduce the overflow of electrolyte in the gas collecting cylinder, while ensuring that the electrolyte can fully contact the anode sheet 211 and the cathode sheet to ensure the electrolysis efficiency. This is because as the electrolysis proceeds, a certain amount of oxygen and hydrogen will accumulate at the top of the first gas collecting cylinder 20 and the second gas collecting cylinder, which will cause the internal pressure of the first gas collecting cylinder 20 and the second gas collecting cylinder to rise, thereby causing the electrolyte in the first gas collecting cylinder 20 and the second gas collecting cylinder to overflow, and the dissolved oxygen and hydrogen in the electrolyte to diffuse and mix, which cannot fully separate the hydrogen and oxygen. If the electrolyte in the first gas collecting cylinder 20 and the second gas collecting cylinder is directly pumped at the top, in order to ensure the electrolysis efficiency, the pump should be operated at a low flow rate. However, due to the large volume of the first gas collecting cylinder 20 and the second gas collecting cylinder, the flow rate of the electrolyte flowing into the bottom of the first gas collecting cylinder 20 and the second gas collecting cylinder is even lower, so a stable flow of electrolyte cannot be formed, and a part of the electrolyte will flow out from the bottom of the gas collecting cylinder.

[0061] In the present technical solution, the first gas collecting cylinder 20 and the second gas collecting cylinder are rotatable, and a plurality of vanes 201 are arranged on the circumferential surface of the side wall of the first gas collecting cylinder 20 and the second gas collecting cylinder at equal intervals. The vanes 201 are arranged obliquely, so that when the first gas collecting cylinder 20 rotates, the vanes 201 apply a tangential rotational force to the electrolyte in the first gas collecting cylinder 20 and an upward lifting force. The rotational force and the lifting force superimpose to make the electrolyte in the first gas collecting cylinder 20 rotate and lift upward, which can offset the electrolyte overflow caused by the pressure rise at the top of the first gas collecting cylinder 20, and on the other hand, the electrolyte rotates in the first gas collecting cylinder 20 to form a stable fluid, so that the electrolyte outside the bottom of the first gas collecting cylinder 20 can be uniformly sucked into the first gas collecting cylinder 20, avoiding the overflow of part of the electrolyte from the first gas collecting cylinder 20. Therefore, in the present embodiment, the first gas collecting cylinder 20 can form a stable lifting force at a low flow rate by self-rotation, avoiding the overflow of electrolyte from the opening at the bottom of the first gas collecting cylinder 20, and effectively preventing the mixing of oxygen and hydrogen in the electrolyte. The second gas collecting cylinder has the same effect as the first gas collecting cylinder 20, so it is not repeated here.

[0062] As Figure 2As shown in the embodiment, the first gas collecting cylinder 20 is internally provided with two or more mutually parallel anode sheets 211, and the second gas collecting cylinder is internally provided with two or more mutually parallel cathode sheets. Therefore, the diameters of the first gas collecting cylinder 20 and the second gas collecting cylinder are large, and the diameters of the first gas collecting cylinder 20 and the second gas collecting cylinder are greater than 0.8 meters, and the heights are greater than 1 meter. The rotation speeds of the first gas collecting cylinder 20 and the second gas collecting cylinder are greater than or equal to 40 revolutions per minute and less than 70 revolutions per minute. Therefore, in the embodiment, the low-speed rotation of the first gas collecting cylinder 20 and the second gas collecting cylinder can avoid the overflow of the electrolyte.

[0063] As shown in the embodiment, Figure 1 The oxygen separator 3 is connected with the electrolytic tank 1 through a first return pipe 32, and is used for returning the electrolyte after oxygen separation to the electrolytic tank 1. The hydrogen separator 4 is connected with the electrolytic tank 1 through a second return pipe 42, and is used for returning the electrolyte after hydrogen separation to the electrolytic tank 1.

[0064] In the embodiment, the oxygen separator 3 and the hydrogen separator 4 are arranged outside the electrolytic tank 1, so that maintenance is facilitated, and the electrolyte after gas-liquid separation is returned to the electrolytic tank 1 for recycling.

[0065] As shown in the embodiment, Figure 3 In the embodiment, a modulation tank 5 is further included, which is used for collecting the electrolyte discharged from the first return pipe 32 and the second return pipe 42, and returning the electrolyte after pH modulation to the electrolytic tank 1. Since the pH value of the electrolyte in the electrolytic tank 1 changes with the electrolysis, in the embodiment, the modulation tank 5 is provided with a dosing port, and the pH value of the electrolyte can be adjusted in real time through the modulation tank 5, so that the electrolyte is dynamically maintained in a set pH value range.

[0066] As shown in the embodiment, Figure 1 In the embodiment, the first gas collecting cylinder 20 and the second gas collecting cylinder are arranged in pairs; that is, the first gas collecting cylinder 20 and the second gas collecting cylinder are one-to-one corresponding. The top portions of the first gas collecting cylinder 20 and the second gas collecting cylinder are respectively provided with hollow transmission shafts 202; the top portions of the hollow transmission shafts 202 are provided with driving wheels 203; the first gas collecting cylinder 20 and the second gas collecting cylinder are connected to a driving device through the hollow transmission shafts 202 and the driving wheels 203. The first suction pipe 311 and the second suction pipe are both externally extended into the first gas collecting cylinder 20 and the second gas collecting cylinder through the hollow transmission shafts 202.

[0067] The driving wheel 203 can be one of a gear, a sprocket or a pulley. The driving wheel 203 of the first gas collector 20 and the driving wheel 203 of the second gas collector can be connected through corresponding transmission members (for example, a chain or a transmission belt) and then connected to the driving device. In this way, one driving device can synchronously drive the first gas collector 20 and the second gas collector.

[0068] The suction end of the first suction pipe 311 and the second suction pipe is respectively provided with a liquid level sensor 313 for detecting the electrolyte level. When the liquid level sensor 313 cannot detect the electrolyte, the driving device increases the rotation speed of the corresponding first gas collector 20 or second gas collector. The liquid level sensor 313 can be a capacitive liquid level sensor 313 or a float type liquid level sensor 313. The rotation speed of the first gas collector 20 or the second gas collector is controlled by the detection result of the liquid level sensor 313, so that the first suction pipe 311 and the second suction pipe can reliably suck the electrolyte.

[0069] As shown in FIG. 1, the first gas collector 20 and the second gas collector are connected to the driving device through the transmission member 202. The driving device drives the first gas collector 20 and the second gas collector to rotate. Figure 2 As shown in FIG. 1, the first gas collector 20 and the second gas collector are connected to the driving device through the transmission member 202. The driving device drives the first gas collector 20 and the second gas collector to rotate.

[0070] As shown in FIG. 1, the first gas collector 20 and the second gas collector are connected to the driving device through the transmission member 202. The driving device drives the first gas collector 20 and the second gas collector to rotate. Figure 2 and Figure 4 As shown in FIG. 1, the first gas collector 20 and the second gas collector are connected to the driving device through the transmission member 202. The driving device drives the first gas collector 20 and the second gas collector to rotate.

[0071] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of the present application, they should not limit the patent protection scope of the present application. Any equivalent structure or equivalent process replacement or modification based on the essential concept of the present application, the contents described in the specification and drawings, and the direct or indirect implementation of the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. An energy-saving seawater hydrogen production device, characterized by comprising: The application relates to an electrolytic tank, which comprises the following components: an electrolytic tank, which is internally provided with salty electrolyte, a plurality of anode assemblies and a plurality of cathode assemblies, the anode assembly comprises an anode sheet and a first gas collecting cylinder, the cathode assembly comprises a cathode sheet and a second gas collecting cylinder; the surface of the cathode sheet is loaded with an active component, and the active component comprises one or more of nickel and molybdenum; the first gas collecting cylinder and the second gas collecting cylinder are tubular structures with open bottoms and closed tops, the anode sheet is arranged in the first gas collecting cylinder, the cathode sheet is arranged in the second gas collecting cylinder, the inner wall of the first gas collecting cylinder and the second gas collecting cylinder is provided with blades, and the top of the first gas collecting cylinder and the second gas collecting cylinder is connected with a driving device; during electrolysis, the first gas collecting cylinder and the second gas collecting cylinder are driven to rotate axially by the driving device, the blades make the electrolyte in the first gas collecting cylinder and the second gas collecting cylinder form a rotating upward vortex, and the electrolyte outside the first gas collecting cylinder and the second gas collecting cylinder is uniformly sucked from the openings; the top of the first gas collecting cylinder is further provided with a first suction pipe; the top of the second gas collecting cylinder is further provided with a second suction pipe; an oxygen separator is arranged outside the electrolytic tank and is connected with the first suction pipes through a first manifold, and is used for sucking the electrolyte at the top of the first gas collecting cylinder to the outside of the electrolytic tank and separating oxygen in the electrolyte; a hydrogen separator is arranged outside the electrolytic tank and is connected with the second suction pipes through a second manifold, and is used for sucking the electrolyte at the top of the second gas collecting cylinder to the outside of the electrolytic tank and separating hydrogen in the electrolyte; the oxygen separator is connected with the electrolytic tank through a first return pipe, and is used for returning the electrolyte after oxygen separation to the electrolytic tank; the hydrogen separator is connected with the electrolytic tank through a second return pipe, and is used for returning the electrolyte after hydrogen separation to the electrolytic tank; a modulation tank is further arranged, which is used for collecting the electrolyte discharged from the first return pipe and the second return pipe, and returning the electrolyte to the electrolytic tank after pH modulation; the first gas collecting cylinder and the second gas collecting cylinder are arranged in pairs; the top of the first gas collecting cylinder and the second gas collecting cylinder is respectively provided with a hollow transmission shaft; the top of the hollow transmission shaft is provided with a driving wheel; the first gas collecting cylinder and the second gas collecting cylinder are connected with the driving device through the hollow transmission shaft and the driving wheel; the first suction pipe and the second suction pipe are both externally extended into the first gas collecting cylinder and the second gas collecting cylinder through the hollow transmission shaft; the suction end of the first suction pipe and the second suction pipe is respectively provided with a liquid level sensor for detecting the height of the electrolyte; when the liquid level sensor cannot detect the electrolyte, the driving device increases the rotating speed of the corresponding first gas collecting cylinder or second gas collecting cylinder; the first gas collecting cylinder is internally provided with two or more parallel anode sheets, and the second gas collecting cylinder is internally provided with two or more parallel cathode sheets; the diameter of the first gas collecting cylinder and the second gas collecting cylinder is greater than or equal to 0.8 m, the height is greater than 1 m, and the rotating speed is less than 70 rpm. ​ ​ ​ ​ ​ 2. The energy-saving seawater hydrogen production device according to claim 1, characterized in that, ​ ​ 3. The energy-saving seawater hydrogen production device according to claim 2, characterized in that, ​ 4. The energy-saving seawater hydrogen production device according to claim 1, characterized in that, ​ ​ ​ ​ 5. The energy-saving seawater hydrogen production device according to claim 4, characterized in that, ​ 6. The energy-saving seawater hydrogen production device according to claim 1, characterized in that, ​ ​ 7. The energy-saving seawater hydrogen production device according to claim 1, characterized in that, The top and bottom of the inner side of the side wall of the first gas collecting cylinder and the second gas collecting cylinder are provided with the vane.

8. The energy-saving seawater hydrogen production device according to claim 1, characterized in that, The molar ratio of the nickel and the molybdenum in the active component is 1:0.5 to 1:

2.

9. The energy-saving seawater hydrogen production device according to claim 1, characterized in that, The oxygen separator and the hydrogen separator are cyclone separators or membrane gas-liquid separators.

10. The energy-saving seawater hydrogen production device according to claim 1, characterized in that, The top of the first gas collecting cylinder is further provided with an oxygen collecting pipe, and the top of the second gas collecting cylinder is further provided with a hydrogen collecting pipe.

Images