DE202021004131U1 - Hydrogen generation system based on electro-adsorption desalination technology using wind power at sea - Google Patents

Abstract

Hydrogen production system based on electro-adsorption desalination technology by means of offshore wind power, characterized in that it comprises an offshore wind power plant (1), a power divider (2), a power grid (3), an AC/DC rectifier (4) , an electrolytic hydrogen generating device (5), a hydrogen separator (6), a hydrogen storage device (7), an oxygen separator (8), an oxygen storage device (9), a waste water storage device (12), a sea water supply pipe, an electro-adsorption desalination device (13) and a water refill tank (14);
wherein an output of the offshore wind power plant (1) is connected to an input of the power divider (2), an output of the power divider (2) is connected to the power grid (3) and an input of the AC/DC rectifier (4). , an output of the AC/DC rectifier (4) is connected to a power supply interface of the electrolytic hydrogen generation device (5), a hydrogen outlet of the electrolytic hydrogen generation device (5) is connected to the hydrogen storage device (7) via the hydrogen separator (6), an oxygen outlet of the electrolytic hydrogen generation device (5) is connected to an inlet of the oxygen separator (8), an oxygen outlet of the oxygen separator (8) is connected to the oxygen storage tank (9), a water outlet of the oxygen separator (8) is connected to an inlet of the waste water tank (12), an outlet of the drain water tank (12) and the sea water supply pipe with ei an inlet of the electroadsorption desalination device (13), an outlet of the electroadsorption desalination device (13) is connected to an inlet of the water replenishment tank (14), and an outlet of the water replenishment tank (14) is connected to an inlet of the electrolytic hydrogen generation device (5). .

Description

TECHNICAL AREA

The present disclosure belongs to the field of hydrogen energy source and relates to an electro-adsorption desalination technology-based system for hydrogen generation by offshore wind power.

STATE OF THE ART

As the problems of climate change and global warming become more acute, various countries around the world are actively engaged in reducing carbon emissions, reducing the use of fossil fuels, and developing clean, renewable energy sources. In China, too, the act of changing the ratio of energy sources used to each other is accelerating, and in recent years, power generation by regenerative energy, especially wind power and photovoltaic power, has undergone rapid development. Due to the decrease in the number of good wind power plants on the mainland, the development of offshore wind power plants in China has gradually entered an acceleration phase. Despite this rapid development, however, it faces the same problem as the offshore wind power industry of various countries: the construction speed of the power grid is so slow that it cannot meet the rapidly growing demand for power supply, which eventually leads to extensive curtailment of power generation and consumption wind power leads. By changing the limited applications of power supply and power grid integration, and directly coupling the offshore wind power plants with an energy-intensive industry and combining power grid integration with energy storage, the above problem can be effectively solved. Hydrogen energy is characterized by cleanliness and high efficiency and is regarded as the most potential energy carrier of the future. Hydrogen generation by means of the wind power standing on the sea can consume the unused or even wasted wind power or electricity energy on site, balance the ratio between electricity supply and electricity consumption in the electricity grid. It represents a possible solution for the development of wind power at sea.

The electrolytic hydrogen generation technologies commercialized to date include alkaline water electrolysis hydrogen generation and water electrolysis hydrogen generation with a proton exchange membrane. Both technologies require pure water as a raw material for the electrolysis. However, for offshore wind power plants, the application of electrolytic hydrogen generation technology is limited by the lack of pure water supply. Pure water can be produced on-site by seawater desalination using reverse osmosis, electro-osmosis, etc., but high equipment investment and complicated technical process result in significantly increased hydrogen production costs and reduced economic benefits of hydrogen energy storage. With direct seawater electrolysis hydrogen generation technology, it can effectively avoid the problem of pure water supply, but the high concentration of Cl ^- , Mg ²⁺ and Ca ²⁺ in seawater will cause serious problems of hydrogen generation equipment corrosion and efficiency reduction. With the electro-adsorption technology, ions in seawater can be adsorbed and separated under the action of an electric force, thereby obtaining a product water with a low concentration. During the treatment, there are almost no demands on the quality of the water and in addition to good stability of the cyclic operation, seawater desalination can be achieved with low energy consumption when a low external voltage is applied. Diluted seawater after electro-adsorption desalination is used as the raw material for electrolytic hydrogen production, which can effectively solve the above technical problem of hydrogen production by direct seawater electrolysis.

At present, the technology of generating hydrogen from wind power is mainly used in onshore wind power plants. The electricity generated by wind power is not completely consumed. Due to the limitation of pure water supply, hydrogen generation technology for hydrogen energy storage in offshore wind power plants has not been reported so far. Therefore, an electro-adsorption desalination technology-based system and methods for offshore wind power generation of hydrogen are needed in this field, thereby increasing offshore and on-site consumption of the electricity generated by renewable wind power by combining seawater desalination with electrolytic hydrogen generation reach.

CONTENTS OF THE PRESENT DISCLOSURE

Technical problem

the solution of the problem

Technical solution

The object underlying the present disclosure is to overcome the above disadvantage mentioned in the prior art and to provide an electro-adsorption desalination technology-based system and method for offshore wind power generation of hydrogen, which combines seawater desalination with electrolytic hydrogen generation and thus achieved the offshore and on-site consumption of the electricity generated by the renewable wind power.

The object is achieved by the electro-adsorption desalination technology-based offshore wind power hydrogen generation system according to the present disclosure, which includes an offshore wind power plant, a power divider, a power grid, an AC/DC rectifier, an electrolytic hydrogen generation device, a hydrogen separator, a hydrogen storage tank, an oxygen separator, an oxygen storage tank, a drain water storage tank, a seawater supply pipe, an electro-adsorption desalinator, and a water replenishing tank;
wherein an output of the offshore wind power plant is connected to an input of the power divider, an output of the power divider is connected to the power grid and an input of the AC/DC rectifier, an output of the AC/DC rectifier is connected to a power supply interface of the electrolytic hydrogen production device a hydrogen outlet of the electrolytic hydrogen generating device is connected to the hydrogen storage tank via the hydrogen separator, an oxygen outlet of the electrolytic hydrogen generating device is connected to an inlet of the oxygen separator, an oxygen outlet of the oxygen separator is connected to the oxygen storage tank, a water outlet of the oxygen separator is connected to an inlet of the drain water storage tank an outlet of the drain water tank and the seawater supply pipe are connected to an inlet of the electroadsorption desalination apparatus d, an outlet of the electroadsorption desalination device is connected to an inlet of the water replenishing tank, and an outlet of the water replenishing tank is connected to an inlet of the electrolytic hydrogen generating device.

The present disclosure further includes a cooler and a circulating pump, wherein an inlet of the circulating pump is connected to the water outlet of the oxygen separator and an outlet of the circulating pump is connected to a water inlet of the electrolytic hydrogen generating device via the cooler.

The electrolytic hydrogen generating device is an anion exchange membrane electrolyzer, and a membrane in the electrolytic hydrogen generating device is a selective OH ^- exchange membrane containing a quaternary ammonium compound, imidazole and pyridine; wherein for an anode and a cathode in the electrolytic hydrogen generating device, a titanium mesh, a titanium corrugated plate, a nickel foam or a copper foam is used as a substrate whose surface is provided with an active coating; wherein the cathode, membrane and anode are in intimate contact forming a zero gap electrolyzer structure.

An electrode in the electroadsorption desalting apparatus is formed into a plate-like or felt-like shape, and a polytetrafluoroethylene fabric is attached to a surface of the electrode, the electrode being made of one or more of the following materials: activated carbons, carbon fibers and carbon nanotubes.

• Stromerzeugung durch ein auf dem Meer stehendes Windkraftwerk in Echtzeit; Speisen der durch das auf dem Meer stehende Windkraftwerk erzeugten Elektrizität über einen Leistungsteiler sämtlich an ein Stromnetz, wenn die durch das auf dem Meer stehende Windkraftwerk erzeugte Strommenge gleich oder geringer als eine geplante Strommenge des Stromnetzes ist;
• Speisen der übermäßigen Elektrizität über den Leistungsteiler und einen AC/DC-Gleichrichter an eine elektrolytische Wasserstofferzeugungsvorichtung unter der Voraussetzung, dass die durch das auf dem Meer stehende Windkraftwerk erzeugte Elektrizität die Anforderung der Planung des Stromnetzes erfüllt, wenn die durch das auf dem Meer stehende Windkraftwerk erzeugte Strommenge größer als die geplante Strommenge des Stromnetzes ist, und Erzeugen von Wasserstoff und Sauerstoff durch Elektrolyse von Wasser bei der elektrolytischen Wasserstofferzeugungsvortichtung; wobei Wasserstoff in ein Wasserstoffspeichersystem eintritt,
• dort gespeichert wird und in einen Wasserstoffabscheider zum Trennen eintritt, wobei abgeschiedenes Sauerstoff in einen Sauerstoffspeicher eintritt und abgeschiedenes Wasser in einen Ablaufwasserspeicher eintritt, wobei Meerwasser, das durch ein Zuführungsrohr für Meerwasser zugeführt wird, und Wasser, das aus dem Ablaufwasserspeicher zugeführt wird, nach Zusammenlaufen in die elektrolytische Wasserstofferzeugungsvortichtung eintreten und dort durch Elektrolyse entsalzt werden, wobei verdünntes Meerwasser nach der elektrolytischen Entsalzung in einen Wassernachfüllbehälter eintritt und aus dem Wassernachfüllbehälter zugeführtes verdünntes Meerwasser in die elektrolytische Wasserstofferzeugungsvortichtung eintritt.

The electro-adsorption desalination technology-based hydrogen production process using offshore wind power according to the present disclosure includes the following steps:

• Electricity generation by a wind power plant standing on the sea in real time; feeding the electricity generated by the offshore wind power plant all to a power grid via a power divider when the amount of power generated by the offshore wind power plant is equal to or less than a planned power amount of the power grid;
• Feeding the excessive electricity through the power divider and an AC/DC rectifier to an electrolytic hydrogen generating device, provided that the electricity generated by the offshore wind power plant meets the requirement of the power grid planning when the offshore wind power plant generated electricity amount is larger than the planned electricity amount of the electric power grid, and generating hydrogen and oxygen by electrolysis of water at the electrolytic hydrogen generating device; where hydrogen enters a hydrogen storage system,
• is stored there and enters a hydrogen separator for separation, wherein separated oxygen enters an oxygen storage tank and separated water enters a drain water storage tank, with sea water supplied through a sea water supply pipe and water supplied from the drain water storage tank after converging enter the electrolytic hydrogen generating device and are desalinated there by electrolysis, wherein diluted seawater after electrolytic desalination enters a water replenishing tank and diluted seawater supplied from the water replenishing tank enters the electrolytic hydrogen generating device.

Beneficial Effects of Disclosure

Beneficial Effects

• Beim Betrieb des auf Elektroadsorption-Entsalzungstechnologie basiertes System und Verfahren zur Wasserstofferzeugung mittels Windkraft auf dem Meer nach der vorliegenden Offenbarung wird unter der Voraussetzung, dass die durch das auf dem Meer stehende Windkraftwerk erzeugte Strommenge die Anforderung der Planung des Stromnetzes erfüllt, die übermäßige Elektrizität über den AC/DC-Gleichrichter in die elektrolytische Wasserstofferzeugungsvortichtung eingespeist. Wasserstoff und Sauerstoff werden durch Elektrolyse von Wasser bei der elektrolytischen Wasserstofferzeugungsvortichtung erzeugt, womit das Offshore- und Vorort-Verbrauchen des durch die erneuerbare Windkraft erzeugten Stroms erreicht und das Problem von nicht ausgenutzter oder sogar verschwendeter Windkraft oder umgewandelter Stromenergie beim auf dem Meer stehenden Windkraftwerk gelöst wird. Des Weiteren tritt Meerwasser, das durch das Zuführungsrohr für Meerwasser zugeführt wird, in die elektrolytische Wasserstofferzeugungsvortichtung ein, und wird dort durch Elektrolyse entsalzt und verdünntes Meerwasser nach der elektrolytischen Entsalzung tritt in die elektrolytische Wasserstofferzeugungsvortichtung ein, womit die Meerwasser-Entsalzung mit der elektrolytischen Wasserstofferzeugung kombiniert und somit die Abhängigkeit der herkömmlichen elektrolytischen Wasserstofferzeugung von Reinwasser vermieden wird, was zum Sparen der Investitionen für Meerwasser-Entsalzung bei herkömmlicher Wasserstofferzeugungstechnik und somit zu erheblicher Senkung der Anlageinvestitionen der Offshore-Windkraft-Wasserstofferzeugungsproj ekte beiträgt. Des Weiteren ist darauf hinzuweisen, dass bei der vorliegenden Offenbarung durch Verwendung der Elektroadsorption-Entsalzungstechnologie die Konzentration von Cl^- im Meerwasser im Wasserstofferzeugungssystem gesenkt wird, was für das Unterdrücken der Korrosion des Katalysators und der Elektrodenplatte und das Verlängern der Lebensdauer des Wasserstofferzeugungssystems zweckmäßig ist. Gleichzeitig werden Ca²⁺ und Mg²⁺ effektiv aus dem Meerwasser beseitigt, womit die Ablagerung der Härte-Ionen an der Oberfläche der Elektrode verhindert wird, wodurch der Energieverbrauch und die Kosten der Wasserstofferzeugung erheblich gesenkt werden können.

The present disclosure features the following beneficial effects:

• In the operation of the electro-adsorption desalination technology-based system and method for hydrogen generation by offshore wind power according to the present disclosure, provided that the amount of electricity generated by the offshore wind power plant meets the requirement of power grid planning, the excess electricity over the AC/DC rectifier is fed into the electrolytic hydrogen generating device. Hydrogen and oxygen are generated by electrolysis of water at the electrolytic hydrogen generation device, thus achieving the offshore and on-site consumption of the electricity generated by the renewable wind power and solving the problem of unused or even wasted wind power or converted electricity energy at the offshore wind power plant becomes. Further, seawater fed through the seawater feed pipe enters the hydrogen electrolytic generation device and is desalinated there by electrolysis, and diluted seawater after desalination enters the hydrogen electrolytic generation device, thus combining seawater desalination with hydrogen electrolysis and thus avoiding the dependence of the conventional electrolytic hydrogen generation on pure water, which contributes to saving the investment for seawater desalination in the conventional hydrogen generation technology, and thus greatly reducing the fixed investment of the offshore wind power hydrogen generation projects. Furthermore, it should be noted that in the present disclosure, by using the electro-adsorption desalination technology, the concentration of Cl ^- in seawater in the hydrogen generation system is lowered, which is useful for suppressing the corrosion of the catalyst and the electrode plate and extending the life of the hydrogen generation system. At the same time, Ca ²⁺ and Mg ²⁺ are effectively removed from the seawater, preventing the deposition of the hardness ions on the surface of the electrode, which can greatly reduce the energy consumption and cost of hydrogen generation.

BRIEF DESCRIPTION OF THE DRAWINGS

Presentation of the drawings

• 1 1 is a schematic diagram of the present disclosure.

1

für auf dem Meer stehendes Windkraftwerk,

2

für Leistungsteiler,

3

für Stromnetz,

4

für AC/DC-Gleichrichter,

5

für elektrolytische Wasserstofferzeugungsvortichtung,

6

für Wasserstoffabscheider,

7

für Wasserstoffspeicher,

8

für Sauerstoffabscheider,

9

für Sauerstoffspeicher,

10

für Umwälzpumpe,

11

für Kühler,

12

für Ablaufwasserspeicher,

13

für Elektroadsorption-Entsalzungsvorrichtung und

14

für Wassernachfüllbehälter.

stand in it

1

for offshore wind power plant,

2

for power dividers,

3

for power grid,

4

for AC/DC rectifiers,

5

for electrolytic hydrogen generation device,

6

for hydrogen separator,

7

for hydrogen storage,

8th

for oxygen separator,

9

for oxygen storage,

10

for circulation pump,

11

for cooler,

12

for drain water tank,

13

for electro adsorption desalination device and

14

for water refill tank.

EXEMPLARY EMBODIMENTS OF THE DISCLOSURE

Embodiments of the present disclosure

• Es wird auf 1 hingewiesen. Das auf Elektroadsorption-Entsalzungstechnologie basiertes System zur Wasserstofferzeugung mittels Windkraft auf dem Meer nach der vorliegenden Offenbarung umfasst ein auf dem Meer stehendes Windkraftwerk 1, einen Leistungsteiler 2, ein Stromnetz 3, einen AC/DC-Gleichrichter 4, eine elektrolytische Wasserstofferzeugungsvortichtung 5, einen Wasserstoffabscheider 6, einen Wasserstoffspeicher 7, einen Sauerstoffabscheider 8, einen Sauerstoffspeicher 9, einen Ablaufwasserspeicher 12, ein Zuführungsrohr für Meerwasser, eine Elektroadsorption-Entsalzungsvorrichtung 13 und einen Wassernachfüllbehälter 14; wobei ein Ausgang des auf dem Meer stehenden Windkraftwerks 1 mit einem Eingang des Leistungsteilers 2 verbunden ist, ein Ausgang des Leistungsteilers 2 mit dem Stromnetz 3 und einem Eingang des AC/DC-Gleichrichters 4 verbunden ist, ein Ausgang des AC/DC-Gleichrichters 4 mit einer Stromversorgungsschnittstelle der elektrolytischen Wasserstofferzeugungsvortichtung 5 verbunden ist, ein Wasserstoffauslass der elektrolytischen Wasserstofferzeugungsvortichtung 5 über den Wasserstoffabscheider 6 mit dem Wasserstoffspeicher 7 verbunden ist, ein Sauerstoffauslass der elektrolytischen Wasserstofferzeugungsvortichtung 5 mit einem Einlass des Sauerstoffabscheiders 8 verbunden ist, ein Sauerstoffauslass des Sauerstoffabscheiders 8 mit dem Sauerstoffspeicher 9 verbunden ist, ein Wasserauslass des Sauerstoffabscheiders 8 mit einem Einlass des Ablaufwasserspeichers 12 verbunden ist, ein Auslass des Ablaufwasserspeichers 12 und das Zuführungsrohr für Meerwasser mit einem Einlass der Elektroadsorption-Entsalzungsvorrichtung 13 verbunden sind, ein Auslass der Elektroadsorption-Entsalzungsvorrichtung 13 mit einem Einlass des Wassernachfüllbehälters 14 verbunden ist und ein Auslass des Wassernachfüllbehälters 14 mit einem Einlass der elektrolytischen Wasserstofferzeugungsvortichtung 5 verbunden ist.

The present disclosure will be discussed in more detail below with reference to the attached drawing:

• It will be on 1 pointed out. The electro-adsorption desalination technology-based offshore wind power hydrogen generation system of the present disclosure includes an offshore wind power plant 1, a power divider 2, a power grid 3, an AC/DC rectifier 4, an electrolytic hydrogen generating device 5, a hydrogen separator 6, a hydrogen storage tank 7, an oxygen separator 8, an oxygen storage tank 9, a drain water storage tank 12, a seawater supply pipe, an electro-adsorption desalinator 13 and a water replenishing tank 14; wherein an output of the offshore wind power plant 1 is connected to an input of the power divider 2, an output of the power divider 2 is connected to the power grid 3 and an input of the AC/DC rectifier 4, an output of the AC/DC rectifier 4 is connected to a power supply interface of the electrolytic hydrogen generating device 5, a hydrogen outlet of the electrolytic hydrogen generating device 5 is connected to the hydrogen storage device 7 via the hydrogen separator 6, an oxygen outlet of the electrolytic hydrogen generating device 5 is connected to an inlet of the oxygen separator 8, an oxygen outlet of the oxygen separator 8 is connected to the oxygen storage device 9, a water outlet of the oxygen separator 8 is connected to an inlet of the drain water tank 12, an outlet of the drain water tank 12 and the seawater supply pipe to an inlet of the electroadsorption Desalination device 13 are connected, an outlet of the electroadsorption desalination device 13 is connected to an inlet of the water replenishing tank 14 and an outlet of the water replenishing tank 14 is connected to an inlet of the electrolytic hydrogen generation device 5 .

The present disclosure further includes a radiator 11 and a circulation pump 10, wherein an inlet of the circulation pump 10 is connected to the water outlet of the oxygen separator 8 and an outlet of the circulation pump 10 is connected to a water inlet of the electrolytic hydrogen generating device 5 via the radiator 11.

• Stromerzeugung durch das auf dem Meer stehende Windkraftwerk 1 in Echtzeit; Speisen der durch das auf dem Meer stehende Windkraftwerk 1 erzeugten Elektrizität über den Leistungsteiler 2 sämtlich an das Stromnetz 3, wenn die durch das auf dem Meer stehende Windkraftwerk 1 erzeugte Strommenge gleich oder geringer als eine geplante Strommenge des Stromnetzes 3 ist; Speisen der übermäßigen Elektrizität über den Leistungsteiler 2 und den AC/DC-Gleichrichter 4 an die elektrolytische Wasserstofferzeugungsvortichtung 5 unter der Voraussetzung, dass die durch das auf dem Meer stehende Windkraftwerk 1 erzeugte Elektrizität die Anforderung der Planung des Stromnetzes 3 erfüllt, wenn die durch das auf dem Meer stehende Windkraftwerk 1 erzeugte Strommenge größer als die geplante Strommenge des Stromnetzes 3 ist, und Erzeugen von Wasserstoff und Sauerstoff durch Elektrolyse von Wasser bei der elektrolytischen Wasserstofferzeugungsvortichtung 5; wobei Wasserstoff in das Wasserstoffspeichersystem eintritt, dort gespeichert wird und in den Wasserstoffabscheider 6 zum Trennen eintritt, wobei abgeschiedenes Sauerstoff in den Sauerstoffspeicher 9 eintritt und abgeschiedenes Wasser in den Ablaufwasserspeicher 12 eintritt, wobei Meerwasser, das durch das Zuführungsrohr für Meerwasser zugeführt wird, und Wasser, das aus dem Ablaufwasserspeicher 12 zugeführt wird, nach Zusammenlaufen in die elektrolytische Wasserstofferzeugungsvortichtung 5 eintreten und dort durch Elektrolyse entsalzt werden, wobei verdünntes Meerwasser nach der elektrolytischen Entsalzung in den Wassernachfüllbehälter 14 eintritt und aus dem Wassernachfüllbehälter 14 zugeführtes verdünntes Meerwasser in die elektrolytische Wasserstofferzeugungsvortichtung 5 eintritt.

The electro-adsorption desalination technology-based hydrogen production process using offshore wind power according to the present disclosure comprises the following steps:

• Electricity generation by the offshore wind power plant 1 in real time; feeding the electricity generated by the offshore wind power plant 1 all to the power grid 3 via the power divider 2 when the amount of power generated by the offshore wind power plant 1 is equal to or less than a planned power amount of the power grid 3; Feeding the excess electricity to the electrolytic hydrogen generating device 5 through the power divider 2 and the AC/DC rectifier 4, provided that the electricity generated by the offshore wind power plant 1 meets the requirement of the power grid 3 planning when the offshore wind power plant 1 is larger than the projected power amount of the power grid 3, and generating hydrogen and oxygen by electrolysis of water at the electrolytic hydrogen generating device 5; wherein hydrogen enters the hydrogen storage system, is stored there and enters the hydrogen separator 6 for separation, separated oxygen enters the oxygen storage 9, and separated water enters the drain water storage 12, sea water supplied through the sea water supply pipe and water supplied from the drain water tank 12, after converging, enter the electrolytic hydrogen generating device 5 and desalinated there by electrolysis, wherein diluted seawater after electrolytic desalination enters the water replenishing tank 14, and diluted seawater supplied from the water replenishing tank 14 enters the electrolytic hydrogen generating device 5 .

Seawater is desalinated by the electroadsorption desalination device 13 , and the obtained diluted seawater is stored in the water replenishing tank 14 and used as a water source as a raw material for the electrolytic hydrogen generating device 5 . The system automatically regulates the top-up amount and the drain amount of seawater depending on the electrical conductivity of circulated seawater. When the electrical conductivity of circulated seawater passing through the electrolyzer exceeds a set value, the water is drained from the system and sent to the drain water reservoir 12, after which it is diluted tes seawater is refilled from the water refilling tank 14 in the system; When the electrical conductivity of circulated seawater passing through the electrolyzer falls below a set value, water refilling is stopped.

Here, the electrolytic hydrogen generating device 5 is an anion exchange membrane electrolyzer, and a membrane in the electrolytic hydrogen generating device 5 is a selective OH ^- exchange membrane containing a quaternary ammonium compound, imidazole and pyridine; wherein for an anode and a cathode in the electrolytic hydrogen generating device 5, a titanium mesh, a titanium corrugated plate, a nickel foam, or a copper foam is used as a substrate whose surface is provided with an active coating; wherein the cathode, membrane and anode are in intimate contact forming a zero gap electrolyzer structure.

An electrode in the electroadsorption desalination apparatus 13 is formed in a plate-like or felt-like manner, and a polytetrafluoroethylene cloth is attached to a surface of the electrode, the electrode being made of one or more of the following materials: activated carbons, carbon fibers, and carbon nanotubes. By attaching a polytetrafluoroethylene fabric to the surface of the electrode, the turbulence of seawater is increased and the accumulation of ions in an electric double layer at the surface of the electrode is promoted. Seawater flows through the space between a cathode plate and an anode plate. Under the action of an electric field, Cl ^- accumulates on the surface of the anode, while Na ⁺ , Mg ²⁺ and Ca ²⁺ accumulate on the surface of the cathode, thus achieving seawater desalination and diluted seawater with significantly reduced ion concentration and significantly reduced electrical conductivity is obtained. Reducing the concentration of Cl ^- in sea water is useful for protecting the electrolyser from corrosion; Lowering the concentrations of Mg ²⁺ and Ca ²⁺ in seawater is useful for suppressing the formation of scale on the surface of the electrode and increasing the efficiency in electrolysis.

During the operation, the electroadsorption desalination device 13 has two operation states: namely, electroadsorption desalination and desorption to discharge the impurity; When the elimination rate is higher than a set value, the apparatus is maintained in the electroadsorption desalination operating state; When the removal rate is lower than the set value, the power supply to the electrode is cut off and desorption is performed to discharge the impurity; The duration of the desorption for removing the impurity is a fixed value, and after the completion of the removal of the impurity, the anode plate is further energized so that the electroadsorption desalination apparatus 13 returns to the electroadsorption desalination operation state.

Claims (4)

Hydrogen production system based on electro-adsorption desalination technology by means of offshore wind power, characterized in that it comprises an offshore wind power plant (1), a power divider (2), a power grid (3), an AC/DC rectifier (4) , an electrolytic hydrogen generating device (5), a hydrogen separator (6), a hydrogen storage device (7), an oxygen separator (8), an oxygen storage device (9), a waste water storage device (12), a sea water supply pipe, an electro-adsorption desalination device (13) and a water refill tank (14); wherein an output of the offshore wind power plant (1) is connected to an input of the power divider (2), an output of the power divider (2) is connected to the power grid (3) and an input of the AC/DC rectifier (4). , an output of the AC/DC rectifier (4) is connected to a power supply interface of the electrolytic hydrogen generation device (5), a hydrogen outlet of the electrolytic hydrogen generation device (5) is connected to the hydrogen storage device (7) via the hydrogen separator (6), an oxygen outlet of the electrolytic hydrogen generation device (5) is connected to an inlet of the oxygen separator (8), an oxygen outlet of the oxygen separator (8) is connected to the oxygen storage tank (9), a water outlet of the oxygen separator (8) is connected to an inlet of the waste water tank (12), an outlet of the drain water tank (12) and the sea water supply pipe with ei an inlet of the electroadsorption desalination device (13), an outlet of the electroadsorption desalination device (13) is connected to an inlet of the water replenishment tank (14), and an outlet of the water replenishment tank (14) is connected to an inlet of the electrolytic hydrogen generation device (5). . Hydrogen generation system based on electro-adsorption desalination technology using wind power at sea claim 1 , characterized in that it further comprises a cooler (11) and a circulation pump (10), wherein an inlet of the circulation pump (10) with the Water outlet of the oxygen separator (8) is connected and an outlet of the circulation pump (10) is connected via the cooler (11) to a water inlet of the electrolytic hydrogen generation device (5). Hydrogen generation system based on electro-adsorption desalination technology using wind power at sea claim 1 , characterized in that the electrolytic hydrogen generating device (5) is an anion exchange membrane electrolyzer and a membrane in the electrolytic hydrogen generating device (5) is a selective OH ^- exchange membrane containing a quaternary ammonium compound, imidazole and pyridine, acts; wherein for an anode and a cathode in the electrolytic hydrogen generating device (5), a titanium mesh, a titanium corrugated plate, a nickel foam or a copper foam is used as a substrate whose surface is provided with an active coating; wherein the cathode, membrane and anode are in intimate contact forming a zero gap electrolyzer structure. Hydrogen generation system based on electro-adsorption desalination technology using wind power at sea claim 1 , characterized in that an electrode in the electroadsorption desalination device (13) is formed in a plate-like or felt-like manner and a polytetrafluoroethylene fabric is attached to a surface of the electrode, the electrode being made of one or more of the following materials: activated carbons, carbon fibers and carbon nanotubes.

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