A device for directly producing hydrogen from seawater

Abstract

The present invention discloses a device for direct hydrogen production from seawater, which includes a seawater channel, a deionization channel, a buffer channel, an electrolyzer channel, and a hydrogen channel; a nanochannel is provided between the deionization channel and the buffer channel, the first end of the nanochannel is connected to the deionization channel, and the deionization channel is divided into a concentrated salt water sub-channel and a fresh water sub-channel; the second end of the nanochannel is connected to the buffer channel; wherein the concentrated salt water sub-channel is connected to the seawater channel; and the fresh water sub-channel is connected to the electrolyzer channel. In the present application, the seawater deionization and electrolytic hydrogen production processes are integrated in the same device, which effectively reduces the energy consumption of seawater deionization, solves the problems of traditional seawater hydrogen production technology requiring separate desalination equipment, high desalination energy consumption, and complex process flow, and realizes low-energy consumption, low-cost direct hydrogen production from seawater.

Description

Technical Field

[0001] The invention relates to the field of hydrogen production from seawater, and in particular to a device for directly producing hydrogen from seawater. Background Art

[0002] Hydrogen is an important clean energy source in the future, with the characteristics of being pollution-free and having high energy density. Currently, mature commercial hydrogen production technologies mainly include water electrolysis, coal gasification, and natural gas steam reforming. Among them, the water electrolysis process is clean and emission-free, and the hydrogen produced is of high purity, making it one of the more ideal hydrogen production technologies. Seawater, one of the most abundant resources on Earth, can be used as a water source for hydrogen production by electrolysis. If efficient seawater hydrogen production can be achieved and seawater resource utilization can be realized, it will have great application prospects. In addition, abundant renewable energy sources at sea, such as wind and solar energy, can be used as a source of electricity for hydrogen production by electrolysis of seawater, realizing the electrochemical storage of renewable energy, which is extremely attractive.

[0003] However, the presence of complex ions in seawater will corrode the electrodes of electrolytic hydrogen production equipment and cannot be used directly for electrolysis. Traditional seawater hydrogen production technology mostly uses seawater desalination, such as distillation, reverse osmosis and electrodialysis to produce pure water on site, and then uses electrolytic hydrogen production equipment to produce hydrogen. The equipment is complex and increases the energy consumption of hydrogen production. Therefore, the existing technology needs to be improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a seawater direct hydrogen production device in view of the above-mentioned defects of the prior art, aiming to solve the technical problems in the prior art that the seawater hydrogen production system requires separate desalination equipment and has high energy consumption for hydrogen production.

[0005] The present application provides a device for directly producing hydrogen from seawater, the device comprising:

[0006] seawater channel, deionization channel, buffer channel, electrolyzer channel, and hydrogen channel;

[0007] A nanochannel is provided between the deionization channel and the buffer channel, a first end of the nanochannel is connected to the deionization channel and separates the deionization channel into a concentrated salt water sub-channel and a fresh water sub-channel; a second end of the nanochannel is connected to the buffer channel; an electric field is provided between the deionization channel and the buffer channel;

[0008] Among them, the concentrated salt water sub-channel is connected to the seawater channel; the fresh water sub-channel is connected to the electrolytic cell channel, the electrolytic cell channel is provided with an electrolytic cathode and an electrolytic anode, and the electrolytic cell channel is connected to the hydrogen channel, and the hydrogen channel is used to collect the hydrogen generated by the electrolytic cell channel.

[0009] Furthermore, the electrolytic cell channel comprises:

[0010] A cathode electrolytic cell channel and an anode electrolytic cell channel that are interconnected and separated, wherein the electrolysis cathode is arranged in the cathode electrolytic cell channel, and the electrolysis anode is arranged in the anode electrolytic cell channel;

[0011] Wherein, the hydrogen channel and the fresh water sub-channel are both connected to the cathode electrolyzer channel.

[0012] Furthermore, the seawater direct hydrogen production device comprises: a first plate, a second plate, a third plate, a fourth plate, a fifth plate and a sixth plate stacked in sequence from bottom to top;

[0013] The seawater channel is arranged on the front side of the first layer plate, and the seawater channel is connected to the outside;

[0014] There are a plurality of deionization channels, each of which is arranged on the back side of the third layer plate;

[0015] The buffer channel is arranged on the back side of the fourth layer plate, and the buffer channel is connected to the outside;

[0016] The anode electrolyzer channel is arranged on the front side of the fourth plate, and the cathode electrolyzer channel is arranged on the front side of the fifth plate; the hydrogen channel passes through the sixth plate and is connected to the cathode electrolyzer channel;

[0017] Wherein, the second layer plate is provided with a plurality of first through holes, each of the concentrated salt water sub-channels is connected to the sea water channel through the first through hole at the corresponding position; each of the fresh water sub-channels is connected to the cathode electrolyzer channel;

[0018] There are a plurality of nanochannels, and each of the nanochannels is vertically arranged between the buffer channel and the deionization channel at a corresponding position.

[0019] Furthermore, the seawater direct hydrogen production device also includes:

[0020] an alkali solution channel, the alkali solution channel passing through the sixth layer plate and being connected to the cathode electrolytic cell channel;

[0021] An oxygen channel, wherein the oxygen channel passes through the fifth plate and the sixth plate and is connected with the anode electrolyzer channel.

[0022] Furthermore, the cathode electrolyzer channel comprises:

[0023] A cathode electrolyzer body, wherein the electrolysis cathode is arranged on the cathode electrolyzer body, and the hydrogen channel penetrates the sixth plate and is connected to the cathode electrolyzer body;

[0024] a first electrolysis channel, wherein the first electrolysis channel is connected to the cathode electrolysis cell body, and the fresh water sub-channel is connected to the first electrolysis channel; the alkali solution channel passes through the sixth layer plate and is connected to the first electrolysis channel;

[0025] The anode electrolyzer channel comprises:

[0026] an anode electrolyzer body, wherein the electrolysis anode is arranged in the anode electrolyzer body, and the oxygen channel penetrates through the fifth plate and the sixth plate and is connected to the anode electrolyzer body;

[0027] a second electrolysis channel, wherein the second electrolysis channel is connected to the anode electrolysis cell body and the second electrolysis channel is connected to the outside;

[0028] Wherein, the cathode electrolytic cell body is provided with a second through hole, and the cathode electrolytic cell body and the anode electrolytic cell body are connected through the second through hole.

[0029] Furthermore, the first electrolysis channel is connected to the fresh water sub-channel through a fresh water channel, and the fresh water channel includes: a first vertical channel, a first central channel and a third vertical channel that are connected in sequence; wherein, a plurality of first vertical channels are provided, each of which passes through the second layer plate and is connected to the fresh water sub-channel at a corresponding position; the first central channel is located on the front side of the first layer plate, and the third vertical channel passes through the second layer plate, the third layer plate, the fourth layer plate and the fifth layer plate and is connected to the first electrolysis channel.

[0030] Furthermore, the seawater direct hydrogen production device is also provided with:

[0031] A concentrated brine channel, the concentrated brine channel is connected to the concentrated brine sub-channel, and the concentrated brine channel is connected to the outside;

[0032] Among them, the concentrated brine channel includes: a second vertical channel, a second central channel and a concentrated brine outlet which are connected in sequence; there are multiple second vertical channels, each of which passes through the second layer plate and is connected to the concentrated brine sub-channel at the corresponding position, the second central channel and the concentrated brine outlet are both located on the front side of the first layer plate, and the concentrated brine outlet is connected to the outside.

[0033] Furthermore, the deionization channel is a Y-shaped groove;

[0034] The seawater channel is a U-shaped groove, and the first central channel and the second central channel are both located inside the U-shaped groove;

[0035] The first central channel includes a first central channel body and a plurality of first concentrated channels connected to the first central channel body, each of the first concentrated channels being connected to the first vertical channel at a corresponding position;

[0036] The second central channel includes a second central channel body and a plurality of second concentrated channels connected to the second central channel body, and each of the second concentrated channels is connected to the second vertical channel at a corresponding position.

[0037] Furthermore, the electrolysis anode is a porous micro-electrolysis anode, and the electrolysis cathode is a porous micro-electrolysis cathode.

[0038] Furthermore, the seawater direct hydrogen production device is also provided with:

[0039] An external electrolytic cell anode channel and an external electrolytic cell cathode channel, wherein the external electrolytic cell anode channel passes through the sixth plate and the fifth plate and is connected to the anode electrolytic cell body, and the external electrolytic cell cathode channel passes through the sixth plate and is connected to the cathode electrolytic cell body;

[0040] The sixth layer of the board is provided with a deionized positive electrode and a deionized negative electrode, and the back of the sixth layer of the board is also provided with a plurality of downward extending anode electrodes and a plurality of downward extending cathode electrodes, each of the downward extending anode electrodes is connected to the deionized positive electrode; each of the downward extending cathode electrodes is connected to the deionized negative electrode;

[0041] Among them, each of the downwardly extending anode electrodes penetrates the fifth layer, the fourth layer and the third layer, and is arranged at the corresponding position of the deionization channel; each of the downwardly extending cathode electrodes penetrates the fifth layer and the fourth layer, and is arranged at the corresponding position of the buffer channel.

[0042] Beneficial effects: The present invention provides a device for direct hydrogen production from seawater, which is provided with: a seawater channel, a deionization channel, a buffer channel, an electrolyzer channel and a hydrogen channel; a nanochannel is provided between the deionization channel and the buffer channel, the first end of the nanochannel is connected to the deionization channel, and the deionization channel is divided into a concentrated salt water sub-channel and a fresh water sub-channel; the second end of the nanochannel is connected to the buffer channel; an electric field is provided between the deionization channel and the buffer channel; wherein the concentrated salt water sub-channel is connected to the seawater channel; the fresh water sub-channel is connected to the electrolyzer channel, the electrolyzer channel is provided with an electrolysis cathode and an electrolysis anode, and the electrolyzer channel is connected to the hydrogen channel, and the hydrogen channel is used to collect the hydrogen generated by the electrolyzer channel. In the present application, seawater enters the deionization channel through the seawater channel, and seawater separation is achieved in the deionization channel. The fresh water obtained after separation flows into the electrolyzer channel from the fresh water sub-channel, and hydrogen evolution reaction occurs in the electrolyzer channel. The generated hydrogen flows into the hydrogen channel and is collected. Since the seawater deionization and electrolytic hydrogen production processes are integrated in the same device, the problems of complex traditional seawater hydrogen production equipment and low hydrogen production efficiency are solved, and low-energy consumption and low-cost direct hydrogen production from seawater is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0044] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application.

[0045] Figure 1 This is a first structural schematic diagram of a device for directly producing hydrogen from seawater according to the present application;

[0046] Figure 2 This is a second structural schematic diagram of a device for directly producing hydrogen from seawater according to the present application;

[0047] Figure 3 This is a schematic diagram of the structure of the first plate in a seawater direct hydrogen production device of the present application;

[0048] Figure 4 This is a schematic diagram of the structure of the second plate in a seawater direct hydrogen production device of the present application;

[0049] Figure 5 This is a schematic diagram of the structure of the third plate in a seawater direct hydrogen production device of the present application;

[0050] Figure 6 This is a first structural schematic diagram of the fourth layer plate in a seawater direct hydrogen production device of the present application;

[0051] Figure 7 This is a second structural schematic diagram of the fourth layer plate in a seawater direct hydrogen production device of the present application;

[0052] Figure 8 This is a first structural schematic diagram of the fifth plate in a seawater direct hydrogen production device of the present application;

[0053] Fig. 9 This is a second structural schematic diagram of the fifth plate in a seawater direct hydrogen production device of the present application;

[0054] Fig.10 This is a first structural schematic diagram of the sixth layer plate in a seawater direct hydrogen production device of the present application;

[0055] Fig.11 This is a second structural schematic diagram of the sixth layer plate in a seawater direct hydrogen production device of the present application;

[0056] Fig.12 This is a first schematic diagram of the water flow direction in the seawater deionization process of the present application;

[0057] Fig.13 This is a second schematic diagram of the water flow direction in the seawater deionization process of the present application;

[0058] Fig.14 This is a schematic diagram of the water flow direction during the electrolytic hydrogen production process of this application.

[0059] Figure numerals: 100, first layer plate; 110, seawater channel; 120, seawater inlet; 130, first central channel; 131, first central channel body; 132, first concentrated channel; 140, second central channel; 141, second central channel body; 142, second concentrated channel; 150, concentrated brine outlet; 200, second layer plate; 210, first through hole; 220, first vertical channel; 230, second vertical channel; 300, third layer plate; 310, deionized channel; 311, fresh water sub-channel; 312, concentrated brine sub-channel; 400, fourth layer plate; 410, buffer channel; 411, buffer inlet; 412, buffer outlet; 420, anode electrode The electrolysis cell channel; 421, electrolysis anode; 422, anode electrolysis cell body; 423, second electrolysis channel; 500, fifth layer plate; 510, cathode electrolysis cell channel; 511, electrolysis cathode; 512, cathode electrolysis cell body; 520, second through hole; 513, first electrolysis channel; 600, sixth layer plate; 610, deionized positive electrode; 620, deionized negative electrode; 630, downwardly extending anode electrode; 640, downwardly extending cathode electrode; 10, third vertical channel; 20, nanochannel; 30, downwardly extending anode electrode channel; 40, downwardly extending cathode electrode channel; 50, hydrogen channel; 60, oxygen channel; 70, alkali solution channel; 80, external electrolysis cell anode channel; 90, external electrolysis cell cathode channel. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solution and advantages of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present application.

[0061] In the description of the application, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", "top", "bottom", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0063] In the application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0064] The existing water electrolysis hydrogen production technology currently mainly uses pure water with alkali added as the electrolyte, but the offshore wind farm lacks pure water supply, which limits the application of seawater electrolysis hydrogen production technology. Currently, seawater deionization technologies such as distillation, reverse osmosis and electrodialysis are mostly used to produce pure water on site, but its large amount of energy consumption, high equipment investment and complex process flow will greatly increase the cost of hydrogen production, weaken the economic benefits of hydrogen energy storage, and limit the popularization and use in water-scarce areas. If seawater is directly used as the electrolyte, it will also face many technical bottlenecks. For example, the high concentration of Cl- in seawater will precipitate chlorine at the anode during the electrolysis process, causing anode corrosion. In addition. The Ca2+ and Mg2+ ions in seawater will produce Mg(OH)2 and Ca(OH)2 precipitation under alkaline conditions, causing hydrogen production equipment to be blocked, corroded and efficiency attenuated.

[0065] Based on this, an embodiment of the present application provides a seawater direct hydrogen production device, characterized in that the seawater direct hydrogen production device includes: a seawater channel 110, a deionization channel 310, a buffer channel 410, an electrolyzer channel and a hydrogen channel 50; a nanochannel 20 is provided between the deionization channel 310 and the buffer channel 410, and the first end of the nanochannel 20 is connected to the deionization channel 310, and the deionization channel 310 is divided into a concentrated salt water sub-channel 312 and a fresh water sub-channel 311; the second end of the nanochannel 20 is connected to the buffer channel 410; an electric field is provided between the deionization channel 310 and the buffer channel 410; wherein the concentrated salt water sub-channel 312 is connected to the seawater channel 110; the fresh water sub-channel 311 is connected to the electrolyzer channel, the electrolyzer channel is provided with an electrolysis cathode 511 and an electrolysis anode 421, and the electrolyzer channel is connected to the hydrogen channel 50, and the hydrogen channel 50 is used to collect the hydrogen generated by the electrolyzer channel.

[0066] The following embodiments will be combined with the attached Figures 1 to 14 The device for direct hydrogen production from seawater is elaborated in detail.

[0067] Specifically, in this embodiment, the main body of the device for directly producing hydrogen from seawater is made of inorganic or organic polymer materials, for example, PMMA and / or PDMS materials.

[0068] The appearance of the device for directly producing hydrogen from seawater can be varied, and can be a regular shape or an irregular shape. Preferably, the device for directly producing hydrogen from seawater is in the shape of a cuboid or a cylinder.

[0069] The seawater channel 110 is in communication with the outside, and external seawater flows into the seawater channel 110 through the seawater inlet 120 .

[0070] The deionization channel 310 is disposed inside the seawater direct hydrogen production device, and is connected to the seawater channel 110 . After external seawater flows into the seawater channel 110 , it flows from the seawater channel 110 into the deionization channel 310 .

[0071] The buffer channel 410 is connected to the outside, and a buffer flows in the buffer channel 410 . The buffer flows into the buffer channel 410 through a buffer inlet 411 . Specifically, the buffer is used to drive the ion concentration polarization effect. In a preferred embodiment, the buffer is a phosphate buffer.

[0072] The buffer channel 410 and the deionization channel 310 are separated by the nanochannel 20, the first end of the nanochannel 20 is connected to the deionization channel 310 and divides the deionization channel 310 into a concentrated salt water sub-channel 312 and a fresh water sub-channel 311, and the second end of the nanochannel 20 is connected to the buffer channel 410. The nanochannel 20 is used to realize the ion concentration polarization function, and preferably, the nanochannel 20 is a porous Nafion material, which is prepared by drying and solidifying a Nafion solution at 90°C for 10 minutes.

[0073] Since the deionization channel 310, the buffer channel 410 and the nanochannel 20 are provided, and an electric field is provided between the buffer channel 410 and the deionization channel 310 (i.e., a voltage difference is provided between the first end and the second end of the nanochannel 20), the seawater flowing into the deionization channel 310 undergoes an ion concentration polarization effect (ICP) to achieve the purpose of deionization of the seawater.

[0074] Specifically, under the action of the electric field, the anions and cations at the first end of the nanochannel 20 (generally the anode side) are reduced to form an ion depletion region, and the anions and cations at the second end of the nanochannel 20 (generally the cathode side) are increased to form an ion enrichment region. When the charged particles and ions in the seawater flow through the ion depletion region (the first end of the nanochannel 20), the electric field force causes charge balance, and the charged particles and ions in the seawater cannot pass through the ion depletion region, so that only uncharged water molecules flow through the ion depletion region into the freshwater sub-channel 311, thereby realizing seawater separation.

[0075] Fresh water generated by the ion concentration polarization effect flows from the fresh water sub-channel 311 into the electrolytic cell channel. The electrolytic cell channel is provided with an electrolytic cathode 511 and an electrolytic anode 421 separated from each other. Under the action of an external electric field, hydrogen is generated near the electrolytic cathode 511. The generated hydrogen flows out of the seawater direct hydrogen production device through the hydrogen channel 50 and is collected.

[0076] In the embodiment of the present application, seawater enters the deionization channel 310 through the seawater channel 110, and the seawater deionization process is realized by low-energy ion concentration polarization (ICP). The fresh water obtained after separation flows into the electrolyzer channel from the fresh water sub-channel 311, and a hydrogen evolution reaction occurs in the electrolyzer channel. The generated hydrogen flows into the hydrogen channel 50 and is collected. Since the seawater deionization and electrolytic hydrogen production processes are integrated in the same device, the problems of complex traditional seawater hydrogen production equipment and low hydrogen production efficiency are solved, and low-energy consumption and low-cost direct hydrogen production from seawater is realized.

[0077] On the basis of the above embodiment, the electrolytic cell channel includes: a cathode electrolytic cell channel 510 and an anode electrolytic cell channel 420 that are interconnected and separated, the electrolysis cathode 511 is arranged in the cathode electrolytic cell channel 510, and the electrolysis anode 421 is arranged in the anode electrolytic cell channel 420; wherein the hydrogen channel 50 and the fresh water sub-channel 311 are both connected to the cathode electrolytic cell channel 510.

[0078] Specifically, during the process of hydrogen production by electrolysis, a hydrogen evolution reaction occurs near the electrolytic cathode 511 to generate hydrogen, and an oxygen evolution reaction occurs near the electrolytic anode 421 to generate oxygen. Therefore, in order to avoid the generated hydrogen and oxygen from cross-talking with each other and affecting the separation degree of hydrogen, in this embodiment, the electrolyzer channel includes a cathode electrolyzer channel 510 and an anode electrolyzer channel 420 separated from each other, and the hydrogen channel 50 and the fresh water sub-channel 311 are both connected to the cathode electrolyzer channel 510. Fresh water first flows into the cathode electrolyzer channel 510, and after the hydrogen evolution reaction occurs in the cathode electrolyzer channel 510, it flows into the anode electrolyzer channel 420 to generate an oxygen evolution reaction. Since the cathode electrolyzer channel 510 and the anode electrolyzer channel 420 are separated from each other, the generated hydrogen and oxygen are separated from each other, thereby achieving the purpose of high separation degree of hydrogen and oxygen.

[0079] Based on the above embodiments, the internal geometric structure distribution of the seawater direct hydrogen production device can be diverse, and can be distributed in the same plane or in other geometric spaces. Those skilled in the art can set it according to actual use requirements.

[0080] Specifically, in a preferred embodiment, the seawater direct hydrogen production device includes: a first layer plate 100, a second layer plate 200, a third layer plate 300, a fourth layer plate 400, a fifth layer plate 500 and a sixth layer plate 600 stacked in sequence from bottom to top; the seawater channel 110 is arranged on the front of the first layer plate 100, and the seawater channel 110 is connected to the outside; the deionization channel 310 is provided with a plurality of, each of the deionization channels 310 is arranged on the back of the third layer plate 300; the buffer channel 410 is arranged on the back of the fourth layer plate 400, and the buffer channel 410 is connected to the outside; the anode electrolyzer channel 420 is arranged on the fourth The front side of the layer plate 400, the cathode electrolyzer channel 510 is arranged on the front side of the fifth layer plate 500; the hydrogen channel 50 passes through the sixth layer plate 600 and is connected with the cathode electrolyzer channel 510; wherein, the second layer plate 200 is provided with a plurality of first through holes 210, each of the concentrated brine sub-channels 312 is connected with the seawater channel 110 through the first through hole 210 at the corresponding position; each of the fresh water sub-channels 311 is connected with the cathode electrolyzer channel 510 through the fresh water channel; a plurality of the nanochannels 20 are provided, each of the nanochannels 20 is vertically arranged between the buffer channel 410 and the deionization channel 310 at the corresponding position.

[0081] like Figure 1 , Figure 2As shown, the first layer board 100, the second layer board 200, the third layer board 300, the fourth layer board 400, the fifth layer board 500 and the sixth layer board 600 can be detachably stacked to facilitate their inspection and replacement.

[0082] like Figure 3 As shown, the seawater channel 110 is arranged on the front side of the first plate 100 (the bottom layer of the direct hydrogen production device from seawater), and the seawater channel 110 is provided with an inlet connected to the outside to facilitate the inflow of seawater. The seawater channel 110 can be distributed in a variety of regular or irregular shapes such as straight line, U-shape, S-shape, etc., and one or more seawater channels 110 can be provided, and technicians in this field can set them according to actual use requirements.

[0083] like Figures 4 to 6 As shown, the deionization channel 310 is provided on the back of the third layer plate 300, and a plurality of deionization channels 310 are provided, each of which is connected to the seawater channel 110 through the corresponding first through hole 210 on the second layer plate 200. Generally, the plurality of first through holes 210 and the plurality of deionization channels 310 are evenly arranged directly above the seawater channel 110, so that each deionization channel 310 is connected to the seawater channel 110. Preferably, the first through hole 210 is a microfluidic channel, and a plurality of expandable microfluidic channels are used to achieve seawater deionization with a higher flow rate.

[0084] The buffer channel 410 is arranged on the back of the fourth layer 400, and the back of the fourth layer 400 is also provided with a buffer inlet 411 and a buffer outlet 412, both of which are connected to the outside, and the buffer flows into the buffer channel 410 through the buffer inlet 411, driving the ion concentration polarization effect, and then flows out of the outside from the buffer outlet 412; the buffer channel 410 can be distributed in a variety of regular or irregular shapes such as linear, U-shaped, S-shaped, etc., and the buffer channel 410 can be provided with one or more, and the buffer is a mixed solution composed of weak acid and its salt, weak base and its salt (such as phosphate buffer), which can be set by those skilled in the art according to actual use requirements. The buffer channel 410 and each deionization channel 310 are separated by a vertically arranged nanochannel 20, that is, the third layer 300 and the fourth layer 400 are separated by multiple vertical nanochannels 20, so that the seawater entering each deionization channel 310 can have an ion concentration polarization effect. It is worth noting that the shape and size of the nanochannel 20 are not limited to the size of the end face of the water flow channel, and can also be a plurality of vertical channels distributed within a cross section.

[0085] like Figure 7As shown, an anode electrolyzer channel 420 is provided on the front of the fourth layer 400, and a cathode electrolyzer channel 510 is provided on the front of the fifth layer 500. The hydrogen channel 50 is provided in the area directly above the cathode electrolyzer. The vertically provided hydrogen channel 50 is connected to the cathode electrolyzer and passes through the sixth layer 600 to the outside. The cathode electrolyzer channel 510 is connected to the fresh water sub-channel 311 through the fresh water channel.

[0086] In this embodiment, the seawater deionization process and the electrolytic hydrogen production process are cleverly arranged on the front and back sides of the fourth plate 400, which greatly reduces the volume of the seawater direct hydrogen production device and reduces the complexity of the seawater direct hydrogen production device.

[0087] like Figure 7 to Figure 9 As shown, the cathode electrolyzer and the anode electrolyzer are respectively arranged on the opposite sides of the fifth plate 500 and the fourth plate 400 (for example, in the present embodiment, the cathode electrolyzer is arranged on the right side of the fifth plate 500, and the anode electrolyzer is arranged on the left side of the fourth plate 400), the cathode electrolyzer channel 510 is provided with an electrolysis cathode 511, and the anode electrolyzer channel 420 is provided with an electrolysis anode 421, and an electric field is provided between the electrolysis cathode 511 and the electrolysis anode 421, and the fresh water obtained by deionization and separation of seawater flows from the fresh water sub-channel 311 through the fresh water channel into the cathode electrolyzer channel 510 on the fifth plate 500, and a hydrogen evolution reaction occurs in the cathode electrolyzer channel 510, and the generated hydrogen flows out to the outside through the hydrogen channel 50 and is collected.

[0088] In this embodiment, since the electrolysis anode 421 and the electrolysis cathode 511 are respectively arranged on the fourth layer plate 400 and the fifth layer plate 500, the two are separated from each other and arranged in layers. While separating the generated hydrogen and oxygen, it can also ensure that the distance between the electrolysis anode 421 and the electrolysis cathode 511 is short, thereby achieving the purpose of low energy consumption and high product gas separation.

[0089] On the basis of the above-mentioned embodiment, since alkaline solution needs to be added during the electrolytic hydrogen production process, in a preferred embodiment, the seawater direct hydrogen production device also includes: an alkaline solution channel 70, the alkaline solution channel 70 passes through the sixth layer plate 600 and is connected to the cathode electrolyzer channel 510.

[0090] like Fig.10 , Fig.11 As shown, the alkali solution channel 70 is vertically arranged, and the alkali solution channel 70 is connected to the cathode electrolytic cell channel 510 and passes through the sixth layer plate 600 to be connected to the outside, so as to facilitate the addition of alkali solution from the outside to the electrolytic cell channel for circulation.

[0091] On the basis of the above-mentioned embodiment, the direct hydrogen production device from seawater further includes an oxygen channel 60 , which passes through the fifth plate 500 and the sixth plate 600 and is connected to the anode electrolyzer channel 420 .

[0092] like Figure 8 to Figure 10 As shown, the oxygen channel 60 is vertically arranged directly above the anode electrolyzer channel 420 , and is connected to the outside after passing through the fifth plate 500 and the sixth plate 600 . The oxygen generated in the anode electrolyzer channel 420 passes through the oxygen channel 60 and is collected.

[0093] On the basis of the above-mentioned embodiment, the cathode electrolyzer channel 510 includes: a cathode electrolyzer body 512, the electrolysis cathode 511 is arranged on the cathode electrolyzer body 512, the hydrogen channel 50 passes through the sixth plate 600 and is connected to the cathode electrolyzer body 512; a first electrolysis channel 513, the first electrolysis channel 513 is connected to the cathode electrolyzer body 512, and the fresh water sub-channel 311 is connected to the first electrolysis channel 513 through the fresh water channel; the alkali solution channel 70 passes through the sixth plate 600 and is connected to the first electrolysis channel 513; the anode The cathode electrolyzer channel 420 includes: an anode electrolyzer body 422, the electrolysis anode 421 is arranged in the anode electrolyzer body 422, the oxygen channel 60 passes through the fifth layer plate 500 and the sixth layer plate 600 and is connected to the anode electrolyzer body 422; a second electrolysis channel 423, the second electrolysis channel 423 is connected to the anode electrolyzer body 422, and the second electrolysis channel 423 is connected to the outside; wherein, the cathode electrolyzer body 512 is provided with a second through hole 520, and the cathode electrolyzer body 512 and the anode electrolyzer body 422 are connected through the second through hole 520.

[0094] like Figure 7 , Fig. 9 As shown, the cathode electrolysis cell channel 510 includes a cathode electrolysis cell body 512 and a first electrolysis channel 513 , and the anode electrolysis cell channel 420 includes an anode electrolysis cell body 422 and a second electrolysis channel 423 .

[0095] Specifically, in this embodiment, the first electrolysis channel 513, the cathode electrolysis cell body 512, the anode electrolysis cell body 422 and the second electrolysis channel 423 are arranged in sequence from right to left, and a second through hole 520 is provided on the bottom surface of the cathode electrolysis cell body 512, through which the cathode electrolysis cell body 512 and the anode electrolysis cell body 422 are connected. Preferably, the electrolysis cathode 511 is arranged in the cathode electrolysis cell body 512 and is located on the right side of the second through hole 520, and the electrolysis anode 421 is arranged in the anode electrolysis cell body 422 and is located on the left side of the second through hole 520.

[0096] It is worth noting that since the electrolytic cathode 511 and the electrolytic anode 421 can be arranged in a close layered manner in this embodiment, the ion conduction path during the electrolysis process is reduced, thereby reducing the ohmic loss of the current, reducing the voltage electrolysis, and reducing the energy consumption during the electrolysis process.

[0097] The first electrolysis channel 513 is connected to the fresh water sub-channel 311, and the fresh water first flows into the first electrolysis channel 513. The buffer channel 410 is vertically arranged just above the first electrolysis channel 513. The buffer channel 410 is used to add circulating buffer. The buffer flows into the first electrolysis channel 513 through the vertically arranged buffer channel 410, and is mixed with the fresh water in the first electrolysis channel 513 before flowing into the cathode electrolytic cell channel 510 together. Preferably, the buffer channel 410 is connected to the rightmost end (the side away from the cathode electrolytic cell) of the first electrolysis channel 513, and the fresh water is connected to the middle section of the first electrolysis channel 513, so that the fresh water can be fully mixed with the buffer.

[0098] The second electrolysis channel 423 is connected to the anode electrolysis cell body 422 and leads to the outside. When the fresh water flowing into the anode electrolysis cell undergoes an oxygen evolution reaction, the remaining fresh water flows out from the second electrolysis channel 423 to the outside.

[0099] Based on the above-mentioned embodiment, there are multiple ways for the first electrolysis channel 513 to be connected with the fresh water sub-channel 311. In a preferred implementation, the first electrolysis channel 513 is connected with the fresh water sub-channel 311 through a fresh water channel, and the fresh water channel includes: a first vertical channel 220, a first central channel 130 and a third vertical channel 10 which are connected in sequence; wherein, there are multiple first vertical channels 220, each of which passes through the second layer plate 200 and is connected with the fresh water sub-channel 311 at the corresponding position; the first central channel 130 is located on the front side of the first layer plate 100, and the third vertical channel 10 passes through the second layer plate 200, the third layer plate 300, the fourth layer plate 400 and the fifth layer plate 500 and is connected with the first electrolysis channel 513.

[0100] like Figures 12-14 As shown ( Figure 12 to Figure 14The solid black arrow in the middle indicates the flow direction of fresh water, and the white arrow indicates the flow direction of concentrated brine). The fresh water channel includes a first vertical channel 220, a first central channel 130 and a third vertical channel 10 which are connected in sequence. There are multiple first vertical channels 220, and each first vertical channel 220 passes through the second layer plate 200. The first central channel 130 is arranged on the front side of the first layer plate 100. The third vertical channel 10 passes through the second layer plate 200, the third layer plate 300, the fourth layer plate 400, and the fifth layer plate 500. The fresh water in each fresh water sub-channel 311 flows into the first central channel 130 through the corresponding first vertical channel 220, and then flows into the first electrolysis channel 513 through the third vertical channel 10.

[0101] On the basis of the above-mentioned embodiment, the direct hydrogen production device from seawater is further provided with: a concentrated brine channel, which is connected to the concentrated brine sub-channel 312, and the concentrated brine channel is connected to the outside; wherein, the concentrated brine channel comprises: a second vertical channel 230, a second central channel 140 and a concentrated brine outlet 150 which are connected in sequence; a plurality of second vertical channels 230 are provided, each of which passes through the second layer plate 200 and is connected to the concentrated brine sub-channel 312 at a corresponding position, the second central channel 140 and the concentrated brine outlet 150 are both located on the front side of the first layer plate 100, and the concentrated brine outlet 150 is connected to the outside.

[0102] like Fig.12 and Fig.13 As shown, in this embodiment, after the seawater is separated into fresh water and concentrated brine, the concentrated brine in the concentrated brine sub-channel 312 is discharged to the outside through the concentrated brine channel.

[0103] Specifically, the concentrated brine channel includes a second vertical channel 230, a second central channel 140 and a concentrated brine outlet 150 which are connected in sequence. There are multiple second vertical channels 230, each of which passes through the second layer plate 200. The second central channel 140 and the concentrated brine outlet 150 are both arranged on the front side of the first layer plate 100. After the concentrated brine in each concentrated brine sub-channel 312 flows into the second central channel 140 through the second vertical channel 230, it is discharged to the outside in time through the concentrated brine outlet 150.

[0104] On the basis of the above-mentioned embodiments, the shape of the deionization channel 310 can be various. In a preferred implementation, the deionization channel 310 is a Y-shaped groove.

[0105] like Figure 5As shown, each deionization channel 310 is a Y-shaped groove, and seawater flows in from the first end of the Y-shaped groove through the first through hole 210. A freshwater sub-channel 311 and a concentrated brine sub-channel 312 separated from each other are provided at the second end of the Y-shaped groove. In this embodiment, a flow channel design that can be stacked on a large scale is provided, and seawater deionization with a higher flow rate is achieved by stacking units in series and parallel in multiple directions, which can realize seawater deionization with low energy consumption and high efficiency, and obtain fresh water with a high deionization rate.

[0106] On the basis of the above embodiment, the seawater channel 110 is a U-shaped groove, and the first central channel 130 and the second central channel 140 are both located on the inner side of the U-shaped groove; the first central channel 130 includes a first central channel body 131 and a plurality of first concentrated channels 132 connected to the first central channel body 131, and each of the first concentrated channels 132 is connected to the first vertical channel 220 at the corresponding position; the second central channel 140 includes a second central channel body 141 and a plurality of second concentrated channels 142 connected to the second central channel body 141, and each of the second concentrated channels 142 is connected to the second vertical channel 230 at the corresponding position.

[0107] like Figure 3 As shown, in this embodiment, the seawater channel 110 is two U-shaped grooves symmetrically arranged on the first layer plate 100, the second end of the Y-shaped groove is arranged on the inner side of the U-shaped groove, the first central channel 130 and the second central channel 140 are both located on the inner side of the U-shaped groove, the first central channel 130 includes a first central channel body 131 and a plurality of first concentrated channels 132 connected to the first central channel body 131, and the second central channel 140 includes a second central channel body 141 and a plurality of second concentrated channels 142 connected to the second central channel body 141, wherein fresh water flows into the first concentrated channel 132 at the corresponding position through the first vertical channel 220, then merges into the first central channel body 131, and then flows into the first electrolysis channel 513 through the third vertical channel 10 connected to the first central channel body 131. The concentrated brine flows into the second concentrated channel 142 at the corresponding position through the second vertical channel 230, then merges into the second central channel body 141, and then flows out through the concentrated brine outlet 150 connected to the second central channel body 141.

[0108] On the basis of the above-mentioned embodiment, the electrolysis anode 421 is a porous micro-electrolysis anode 421 , and the electrolysis cathode 511 is a porous micro-electrolysis cathode 511 .

[0109] Specifically, in this embodiment, the electrolysis anode 421 and the electrolysis cathode 511 adopt porous micro-electrolysis, and the porous micro-electrolysis anode 421 and the porous micro-electrolysis cathode 511 can be respectively distributed in the entire anode electrolysis cell body 422 and the cathode electrolysis cell body 512 to increase the reaction area of ​​electrolytic catalytic hydrogen production without affecting the passage of water gas flow, thereby improving the efficiency of electrolytic hydrogen production.

[0110] It is worth noting that since a membraneless design is used in the electrolysis process in this embodiment, the shortcomings of the traditional alkaline water electrolysis hydrogen production asbestos membrane scheme, which is easy to cross-gas and has low safety, are overcome, and the shortcomings of the ion membrane electrolysis hydrogen production scheme, which is high membrane cost and short life, are also overcome.

[0111] On the basis of the above-mentioned implementation mode, the porous micro-electrolysis anode 421 and the porous micro-electrolysis cathode 511 can be prepared by advanced preparation processes such as spraying, electrospinning, and hydrothermal nanofiber growth, and have the advantage of a large reaction area in the electrolysis channel, so that the pores do not affect the passage of water gas flow, and further facilitate high-efficiency and high-stability electrolysis to produce hydrogen.

[0112] On the basis of the above-mentioned implementation, the first concentrated channel 132 and the first vertical channel 220 are both microfluidic channels, which further realize low-energy and high-efficiency seawater deionization to obtain fresh water with a high deionization rate.

[0113] On the basis of the above-mentioned embodiment, in order to facilitate the connection of the electrolysis anode 421 and the electrolysis cathode 511 through a power supply, the direct hydrogen production device from seawater is further provided with: an external electrolytic cell anode channel 80 and an external electrolytic cell cathode channel 90, the external electrolytic cell anode channel 80 passes through the sixth layer plate 600 and the fifth layer plate 500 and is connected to the anode electrolytic cell body 422, the external electrolytic cell cathode channel 90 passes through the sixth layer plate 600 and is connected to the cathode electrolytic cell body 512.

[0114] like Fig.10 As shown, the external electrolytic anode 421 channel is arranged directly above the electrolytic anode 421, and penetrates the fifth layer plate 500 and the sixth layer plate 600 to communicate with the outside, and the external electrolytic cathode 511 channel is arranged directly above the electrolytic cathode 511, and penetrates the sixth layer plate 600 to communicate with the outside, so that the external power supply can communicate the electrolytic anode 421 and the electrolytic cathode 511 through the external electrolytic anode 421 channel and the external electrolytic cathode 511 channel. Specifically, the positive electrode of the external power supply is connected to the electrolytic anode 421 through the external electrolytic anode 421 channel, and the negative electrode of the external power supply is connected to the electrolytic cathode 511 through the external electrolytic cathode 511 channel.

[0115] On the basis of the above-mentioned embodiment, in order to facilitate the formation of an electric field between the buffer channel 410 and the deion channel 310, in a preferred implementation, the sixth layer plate 600 is provided with a deionized positive electrode 610 and a deionized negative electrode 620, and the back of the sixth layer plate 600 is also provided with a plurality of downwardly extending anode electrodes 630 and a plurality of downwardly extending cathode electrodes 640, each of the downwardly extending anode electrodes 630 is connected to the deionized positive electrode 610; each of the downwardly extending cathode electrodes 640 is connected to the deionized negative electrode 620; wherein each of the downwardly extending anode electrodes 630 passes through the fifth layer plate 500, the fourth layer plate 400 and the third layer plate 300, and is arranged at the corresponding position of the deionized channel 310; each of the downwardly extending cathode electrodes 640 passes through the fifth layer plate 500 and the fourth layer plate 400, and is arranged at the corresponding position of the buffer channel 410.

[0116] like Fig.10 , Fig.11 As shown, a deionized positive electrode 610 and a deionized negative electrode 620 are provided on the sixth layer 600 , and a plurality of downward extending electrodes are provided on the back side of the sixth layer 600 , the downward extending electrodes including a downward extending anode electrode 630 and a downward extending cathode electrode 640 , the downward extending anode electrode 630 is connected to the deionized positive electrode 610 , and the downward extending cathode electrode 640 is connected to the deionized negative electrode 620 .

[0117] Specifically, a lower anodic electrode channel 30 and a lower cathodic electrode channel 40 are provided in the direct hydrogen production device from seawater. The lower anodic electrode channel 30 passes through the fifth plate 500, the fourth plate 400, and the third plate 300, and then connects to the deionization channel 310. The lower cathodic electrode channel 40 passes through the fifth plate 500 and the fourth plate 400, and then connects to the buffer channel 410. Therefore, the lower anodic electrode 630 passes through the lower anodic electrode channel 30 and is located in the deionization channel 310. The lower cathodic electrode 640 passes through the lower cathodic electrode channel 40 and is located in the buffer channel 410. When a voltage is externally connected between the deionization positive electrode 610 and the deionization negative electrode 620, the voltage difference between the buffer channel 410 and the deionization channel 310 can be maintained. Preferably, the lower anodic electrode 630 is located directly above the deionization channel 310, and the lower cathodic electrode 640 is located directly above the buffer channel 410. The external voltage can be set to 20V.

[0118] In summary, the present invention provides a device for direct hydrogen production from seawater, which is provided with: a seawater channel, a deionization channel, a buffer channel, an electrolyzer channel and a hydrogen channel; a nanochannel is provided between the deionization channel and the buffer channel, the first end of the nanochannel is connected to the deionization channel, and the deionization channel is divided into a concentrated salt water sub-channel and a fresh water sub-channel; the second end of the nanochannel is connected to the buffer channel; wherein the concentrated salt water sub-channel is connected to the seawater channel; the fresh water sub-channel is connected to the electrolyzer channel, the electrolyzer channel is provided with an electrolysis cathode and an electrolysis anode, and the electrolyzer channel is connected to the hydrogen channel, and the hydrogen channel is used to collect the hydrogen generated by the electrolyzer channel. In the present application, seawater enters the deionization channel through the seawater channel, and seawater separation is achieved in the deionization channel. The fresh water obtained after separation flows into the electrolyzer channel from the fresh water sub-channel, and hydrogen evolution reaction occurs in the electrolyzer channel. The generated hydrogen flows into the hydrogen channel and is collected. Since the seawater deionization and electrolytic hydrogen production processes are integrated in the same device, the problems of complex traditional seawater hydrogen production equipment and low hydrogen production efficiency are solved, and low-energy consumption and low-cost direct hydrogen production from seawater is achieved.

[0119] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A device for direct hydrogen production from seawater, characterized in that: The seawater direct hydrogen production device comprises: seawater channel, deionization channel, buffer channel, electrolyzer channel, and hydrogen channel; A nanochannel is provided between the deionization channel and the buffer channel, a first end of the nanochannel is connected to the deionization channel and separates the deionization channel into a concentrated salt water sub-channel and a fresh water sub-channel; a second end of the nanochannel is connected to the buffer channel; an electric field is provided between the deionization channel and the buffer channel; The concentrated salt water sub-channel is connected to the sea water channel; the fresh water sub-channel is connected to the electrolytic cell channel, the electrolytic cell channel is provided with an electrolytic cathode and an electrolytic anode, and the electrolytic cell channel is connected to the hydrogen channel, and the hydrogen channel is used to collect hydrogen generated by the electrolytic cell channel; The electrolytic cell channel comprises: A cathode electrolytic cell channel and an anode electrolytic cell channel that are interconnected and separated, wherein the electrolysis cathode is arranged in the cathode electrolytic cell channel, and the electrolysis anode is arranged in the anode electrolytic cell channel; Wherein, the hydrogen channel and the fresh water sub-channel are both connected to the cathode electrolyzer channel; The seawater direct hydrogen production device comprises: a first plate, a second plate, a third plate, a fourth plate, a fifth plate and a sixth plate stacked in sequence from bottom to top; The seawater channel is arranged on the front side of the first layer plate, and the seawater channel is connected to the outside; There are a plurality of deionization channels, each of which is arranged on the back side of the third layer plate; The buffer channel is arranged on the back side of the fourth layer plate, and the buffer channel is connected to the outside; The anode electrolyzer channel is arranged on the front side of the fourth plate, and the cathode electrolyzer channel is arranged on the front side of the fifth plate; the hydrogen channel passes through the sixth plate and is connected to the cathode electrolyzer channel; Wherein, the second layer plate is provided with a plurality of first through holes, each of the concentrated salt water sub-channels is connected to the sea water channel through the first through hole at the corresponding position; each of the fresh water sub-channels is connected to the cathode electrolyzer channel; There are a plurality of nanochannels, and each of the nanochannels is vertically arranged between the buffer channel and the deionization channel at a corresponding position.

2. The device for direct hydrogen production from seawater according to claim 1, characterized in that: The seawater direct hydrogen production device also includes: an alkali solution channel, the alkali solution channel passing through the sixth layer plate and being connected to the cathode electrolytic cell channel; An oxygen channel, wherein the oxygen channel passes through the fifth plate and the sixth plate and is connected with the anode electrolyzer channel.

3. The device for direct hydrogen production from seawater according to claim 2, characterized in that: The cathode electrolyzer channel comprises: A cathode electrolyzer body, wherein the electrolysis cathode is arranged on the cathode electrolyzer body, and the hydrogen channel penetrates the sixth plate and is connected to the cathode electrolyzer body; a first electrolysis channel, wherein the first electrolysis channel is connected to the cathode electrolysis cell body, and the fresh water sub-channel is connected to the first electrolysis channel; the alkali solution channel passes through the sixth layer plate and is connected to the first electrolysis channel; The anode electrolyzer channel comprises: an anode electrolyzer body, wherein the electrolysis anode is arranged in the anode electrolyzer body, and the oxygen channel penetrates through the fifth plate and the sixth plate and is connected to the anode electrolyzer body; a second electrolysis channel, wherein the second electrolysis channel is connected to the anode electrolysis cell body and the second electrolysis channel is connected to the outside; Wherein, the cathode electrolytic cell body is provided with a second through hole, and the cathode electrolytic cell body and the anode electrolytic cell body are connected through the second through hole.

4. The device for direct hydrogen production from seawater according to claim 3, characterized in that: The first electrolysis channel is connected to the fresh water sub-channel through a fresh water channel, and the fresh water channel includes: A first vertical channel, a first central channel and a third vertical channel connected in sequence; wherein, there are a plurality of first vertical channels, each of which passes through the second layer plate and is connected to the fresh water sub-channel at the corresponding position; the first central channel is located on the front side of the first layer plate, and the third vertical channel passes through the second layer plate, the third layer plate, the fourth layer plate and the fifth layer plate and is connected to the first electrolysis channel.

5. The device for direct hydrogen production from seawater according to claim 4, characterized in that: The seawater direct hydrogen production device is also provided with: A concentrated brine channel, the concentrated brine channel is connected to the concentrated brine sub-channel, and the concentrated brine channel is connected to the outside; Among them, the concentrated brine channel includes: a second vertical channel, a second central channel and a concentrated brine outlet which are connected in sequence; there are multiple second vertical channels, each of which passes through the second layer plate and is connected to the concentrated brine sub-channel at the corresponding position, the second central channel and the concentrated brine outlet are both located on the front side of the first layer plate, and the concentrated brine outlet is connected to the outside.

6. The device for direct hydrogen production from seawater according to claim 5, characterized in that: The deionization channel is a Y-shaped groove; The seawater channel is a U-shaped groove, and the first central channel and the second central channel are both located inside the U-shaped groove; The first central channel includes a first central channel body and a plurality of first concentrated channels connected to the first central channel body, each of the first concentrated channels being connected to the first vertical channel at a corresponding position; The second central channel includes a second central channel body and a plurality of second concentrated channels connected to the second central channel body, and each of the second concentrated channels is connected to the second vertical channel at a corresponding position.

7. The device for direct hydrogen production from seawater according to any one of claims 1 to 6, characterized in that: The electrolysis anode is a porous micro-electrolysis anode, and the electrolysis cathode is a porous micro-electrolysis cathode.

8. The device for direct hydrogen production from seawater according to any one of claims 1 to 6, characterized in that: The seawater direct hydrogen production device is also provided with: An external electrolytic cell anode channel and an external electrolytic cell cathode channel, wherein the external electrolytic cell anode channel passes through the sixth plate and the fifth plate and is connected to the anode electrolytic cell body, and the external electrolytic cell cathode channel passes through the sixth plate and is connected to the cathode electrolytic cell body; The sixth layer of the board is provided with a deionized positive electrode and a deionized negative electrode, and the back of the sixth layer of the board is also provided with a plurality of downward extending anode electrodes and a plurality of downward extending cathode electrodes, each of the downward extending anode electrodes is connected to the deionized positive electrode; each of the downward extending cathode electrodes is connected to the deionized negative electrode; Among them, each of the downwardly extending anode electrodes penetrates the fifth layer, the fourth layer and the third layer, and is arranged at the corresponding position of the deionization channel; each of the downwardly extending cathode electrodes penetrates the fifth layer and the fourth layer, and is arranged at the corresponding position of the buffer channel.

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