Process for decarburizing residual high-alkalinity electrolyte supplied to ship engine through seawater electrolysis hydrogen production

Abstract

The invention provides a process for decarburizing residual high-alkalinity electrolyte supplied to a ship engine through seawater electrolysis hydrogen production, and belongs to the technical field of seawater electrolysis decarburization. The process is realized based on a seawater electrolysis system, and comprises the following steps: step 1, filtering by a seawater pump through a primary filter and a precision filter to remove impurities in seawater, then feeding the seawater into a seawater concentration membrane for concentration, and feeding the concentrated seawater into an electrolytic cell module group; the wind barrel is installed for generating power, renewable energy is utilized for electrolyzing seawater to produce hydrogen, wind energy is supplied to a ship for combustion, carbon emission is reduced, the wind barrel can be further used for reducing ship resistance, alkali liquor generated through electrolysis is used for ship desulfurization and decarburization, generated chlorine is used for preventing marine organisms, and the system converts the renewable energy to achieve energy conservation and emission reduction. By-products are utilized to complete environment-friendly treatment of ship tail gas and marine organism prevention, so that one set of system equipment realizes multiple functions, and the process can save energy, reduce emission and reduce investment.

Description

Technical Field

[0001] The invention relates to the technical field of seawater electrolysis decarbonization, and in particular to a process for decarbonizing residual high-alkaline electrolyte supplied to ship engines by seawater electrolysis to produce hydrogen. Background Art

[0002] Traditional ship flue gas treatment systems usually use seawater desulfurization and alcohol amine solution decarbonization. Seawater desulfurization uses the alkaline components in seawater to react with sulfur dioxide in flue gas to generate harmless sulfates, thereby effectively removing sulfur dioxide from flue gas. Alcohol amine solution is also widely used in decarbonization. Alcohol amine solution reacts with carbon dioxide in flue gas to form a reversible amine-carbon dioxide complex, thereby effectively removing carbon dioxide from flue gas.

[0003] The existing offshore desulfurization and decarbonization process generally uses the same technology as onshore desulfurization and decarbonization, and mostly uses alcohol amine solution as a decarbonizing agent; this process has a total of more than ten heat exchanger containers such as desulfurization towers, decarbonization towers, and analytical towers. The process is complex, the supporting public works requirements are high, the energy consumption is large, and the space occupied is large. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a process for decarbonizing the residual high-alkaline electrolyte of ship engines by electrolyzing seawater to produce hydrogen, so as to solve the problem that the existing offshore desulfurization and decarbonization process generally adopts the same technology as the desulfurization and decarbonization on land, has a complex process flow, high requirements for supporting public works, high energy consumption, and large space occupation.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A process for decarbonizing the residual high-alkaline electrolyte of ship engines by electrolyzing seawater to produce hydrogen, which is implemented based on a seawater electrolysis system. The process comprises the following steps: Step 1: Remove impurities from the seawater by filtering it through a primary filter and a precision filter through a seawater pump, and then the seawater enters a seawater concentration membrane for concentration, and the concentrated seawater is sent to the electrolyzer module group; Step 2: Install a wind turbine generator module on the ship platform at the top of the ship deck. As the wind turbine of the wind turbine generator module rotates, the generated electricity is stored in the battery energy storage module group. Then the battery energy storage module group supplies power to the electrolyzer module group to electrolyze seawater. Step 3: The hydrogen produced by electrolysis first enters the hydrogen water washing and dehydration tank, and the water washing hydrogen removes chloride ions in the hydrogen. Since a wire mesh demister is arranged on the top of the hydrogen water washing and dehydration tank for hydrogen dehydration, the dehydrated hydrogen enters the hydrogen condensation and dehydration buffer tank. The hydrogen deeply dehydrated by condensation is sent to the hydrogen ship engine by the hydrogen booster pump for combustion, and the flue gas produced by the combustion goes to the ship engine desulfurization and decarbonization tower; Step 4: Turn on the seawater electrolyte delivery pump to deliver the electrolytic alkali solution in the buffer tank. Part of the alkali solution is delivered to the gas-water mixer to mix with the chlorine gas and seawater produced by electrolysis. After mixing, a disinfectant is produced for preventing marine organisms. The remaining alkali solution is delivered to the desulfurization and decarbonization tower. The desulfurization and decarbonization tower adopts wet desulfurization technology, and the effective absorption and treatment of harmful gases are achieved through the spray tower structure inside the desulfurization and decarbonization tower.

[0006] Preferably, the seawater electrolysis system comprises an electrolytic cell module group, a power supply system, a seawater pumping pipeline, an electrolyte delivery pipeline, a gas-water mixer, an elution pipeline, a ship engine and a desulfurization and decarbonization tower. The output end of the gas-water mixer is used for ship anti-fouling and anti-marine life, and the flue gas output end of the ship engine is connected to the ship engine desulfurization and decarbonization tower.

[0007] Preferably, the power supply system comprises a power supply, a battery energy storage module group and a wind tube power generation module connected in sequence, and the power supply is connected to the electrolytic cell module group.

[0008] Preferably, the seawater pumping pipeline comprises a seawater concentration membrane, a precision filter, a seawater pump and a primary filter connected in sequence, the other end of the seawater concentration membrane is connected to the electrolyzer module group, and the seawater pump is used to extract seawater.

[0009] Preferably, the electrolyte delivery pipeline comprises a buffer tank and an electrolyte delivery pump which are connected in sequence, the buffer tank is connected to the electrolytic cell module group, and the electrolyte delivery pump is connected to the gas-water mixer and the decarbonization spray of the desulfurization and decarbonization tower.

[0010] Preferably, the gas-water mixer is connected to the seawater pump, the electrolyzer module group and the desulfurization spray of the desulfurization and decarbonization tower.

[0011] Preferably, a first valve is installed between the gas-water mixer and the seawater pump, and a second valve is installed between the gas-water mixer and the electrolyte delivery pump.

[0012] Preferably, the elution pipeline includes a hydrogen water washing and dehydration tank, a hydrogen condensation and dehydration buffer tank and a hydrogen booster pump which are connected in sequence, the hydrogen output end of the electrolyzer module group is connected to the hydrogen water washing and dehydration tank, and the hydrogen booster pump is connected to the ship engine.

[0013] Preferably, the hydrogen water washing and dehydration tank is connected to a fresh water supply system via a fresh water pump, and the hydrogen water washing and dehydration tank and the hydrogen condensation and dehydration buffer tank are connected to a wastewater discharge system via a valve.

[0014] Preferably, the ship engine is connected to a fuel supply system and an air supply system.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, offshore wind turbines are used to rotate wind turbine power generation modules, while generating electricity and electrolyzing seawater to produce hydrogen, which is supplied to ship engines for combustion, thereby replacing part of traditional fuels and reducing engine carbon emissions. The highly alkaline seawater produced by seawater electrolysis is used for carbon capture, and the chlorine produced by electrolysis is mixed with seawater to eliminate the harm of marine organisms to ships. This process can realize the energy of the entire process, completely use renewable energy, reduce the dependence of the desulfurization and decarbonization system on public works, reduce dependence on chemicals, and reduce the use of fossil fuels in ships.

[0016] In the above scheme, wind tubes are installed to generate electricity and use renewable energy to electrolyze seawater to produce hydrogen, so that wind energy can be converted into energy to supply ships for combustion to reduce carbon emissions. The wind tubes can also be used to reduce ship resistance, and the alkaline solution produced by electrolysis is used for ship desulfurization and decarbonization, and the chlorine gas produced is used to prevent marine life. The system realizes the conversion of renewable energy and uses by-products to complete the environmental protection treatment of ship exhaust gas and prevent marine life, thereby realizing a set of system equipment to achieve multiple functions, which can save energy and reduce emissions while reducing investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0018] Figure 1 Schematic diagram of the system structure of the process for decarbonizing the surplus highly alkaline electrolyte for supplying ship engines with hydrogen from seawater electrolysis.

[0019] Figure numerals: 1. electrolytic cell module group; 2. power supply system; 3. seawater pumping pipeline; 4. electrolyte delivery pipeline; 5. gas-water mixer; 6. elution pipeline; 7. ship engine; 8. desulfurization and decarbonization tower; 9. fresh water pump; 10. fresh water supply system; 11. wastewater discharge system; 12. fuel supply system; 13. air supply system; 201. power supply; 202. battery energy storage module group; 203. wind tube power generation module; 301. seawater concentration membrane; 302. precision filter; 303. seawater pump; 304. primary filter; 401. buffer tank; 402. electrolyte delivery pump; 601. hydrogen water washing and dehydration tank; 602. hydrogen condensation and dehydration buffer tank; 603. hydrogen booster pump.

[0020] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0021] The following is a detailed description of a process for decarbonizing the residual high-alkaline electrolyte of a ship engine by electrolyzing hydrogen produced by seawater provided by the present invention in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0022] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0023] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0024] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0025] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0026] like Figure 1As shown, an embodiment of the present invention provides a process for decarbonizing the residual high-alkaline electrolyte of a ship engine by electrolyzing seawater to produce hydrogen. The process is implemented based on a seawater electrolysis system and includes the following steps: Step 1: Remove impurities from the seawater through the primary filter 304 and the precision filter 302 through the seawater pump 303, and then enter the seawater concentration membrane 301 for concentration, and send the concentrated seawater into the electrolyzer module group 1. The concentrated seawater can increase the concentration of alkali solution after electrolysis, and the high concentration of alkali solution can improve the decarbonization and desulfurization efficiency; Step 2: Install the wind tube power generation module 203 on the ship platform at the top of the ship deck. As the wind tube of the wind tube power generation module 203 rotates, the generated electricity is stored in the battery energy storage module group 202. Then the battery energy storage module group 202 supplies power to the electrolyzer module group 1 to electrolyze seawater. Step 3: The hydrogen produced by electrolysis first enters the hydrogen water washing and dehydration tank 601, and the water washing hydrogen removes chloride ions in the hydrogen to avoid corrosion of equipment. Since a wire mesh demister is provided on the top of the hydrogen water washing and dehydration tank for hydrogen dehydration, the dehydrated hydrogen enters the hydrogen coalescence and dehydration buffer tank 602. The hydrogen that has been coalesced and deeply dehydrated is sent to the hydrogen ship engine 7 by the hydrogen booster pump 603 for combustion, and the flue gas generated by the combustion goes to the ship engine desulfurization and decarbonization tower 8; Step 4. If the desulfurization and decarbonization tower 8 of the ship engine 7 generally only needs desulfurization, it only needs to start seawater spraying. When decarbonization is needed, the seawater electrolyte delivery pump 402 is turned on to deliver the electrolytic alkali solution in the buffer tank 401. Part of the alkali solution is delivered to the gas-water mixer 5 to mix with the chlorine gas and seawater produced by electrolysis. After mixing, a disinfectant is produced for preventing marine organisms. The remaining alkali solution is delivered to the desulfurization and decarbonization tower 8. The desulfurization and decarbonization tower 8 adopts wet desulfurization technology, and the effective absorption and treatment of harmful gases are achieved through the internal spray tower structure of the desulfurization and decarbonization tower 8.

[0027] like Figure 1 As shown, in this embodiment, the seawater electrolysis system includes an electrolytic cell module group 1, a power supply system 2, a seawater pumping pipeline 3, an electrolyte delivery pipeline 4, a gas-water mixer 5, an elution pipeline 6, a ship engine 7 and a desulfurization and decarbonization tower 8. The output end of the gas-water mixer 5 is used for ship anti-fouling and anti-marine life, and the flue gas output end of the ship engine 7 is connected to the ship engine desulfurization and decarbonization tower 8.

[0028] like Figure 1 As shown, in this embodiment, the power supply system 2 includes a power supply 201, a battery energy storage module group 202 and a wind duct power generation module 203 connected in sequence, the wind duct power generation module 203 is installed on the ship platform, the power supply 201 is connected to the electrolytic cell module group 1, and the wind duct power generation module 203 is a device that uses wind energy to generate electricity, which is usually composed of a wind duct, a wind wheel, a generator and a control system.

[0029] like Figure 1 As shown, in this embodiment, the seawater pumping pipeline 3 includes a seawater concentration membrane 301, a precision filter 302, a seawater pump 303 and a primary filter 304 connected in sequence. The other end of the seawater concentration membrane 301 is connected to the electrolyzer module group 1. The seawater pump 303 is used to extract seawater. The seawater pumps 303 are similar to ordinary pumps, but they must have special properties for seawater and adaptability to the environment. The seawater pumps 303 are usually driven by an electric motor or other power source to extract seawater and transport it to the electrolyzer module group 1 through a pipeline.

[0030] like Figure 1 As shown, in this embodiment, the electrolyte delivery pipeline 4 includes a buffer tank 401 and an electrolyte delivery pump 402 connected in sequence, the buffer tank 401 is connected to the electrolytic cell module group 1, and the electrolyte delivery pump 402 is connected to the gas-water mixer 5 and the decarbonization spray of the desulfurization and decarbonization tower 8; the gas-water mixer 5 is connected to the seawater pump 303, the electrolytic cell module group 1 and the desulfurization spray of the desulfurization and decarbonization tower 8; The desulfurization and decarbonization tower 8 is an important equipment in industrial flue gas treatment. It is mainly used to remove sulfur dioxide (SO2) and carbon dioxide (CO2) in flue gas. It usually adopts wet desulfurization technology and realizes effective absorption and treatment of harmful gases through the spray tower structure.

[0031] like Figure 1 As shown, in this embodiment, a first valve is installed between the gas-water mixer 5 and the seawater pump 303 , and a second valve is installed between the gas-water mixer 5 and the electrolyte delivery pump 402 .

[0032] like Figure 1 As shown, in this embodiment, the elution pipeline 6 includes a hydrogen water washing and dehydration tank 601, a hydrogen condensation and dehydration buffer tank 602 and a hydrogen booster pump 603 which are connected in sequence. The hydrogen output end of the electrolyzer module group 1 is connected to the hydrogen water washing and dehydration tank 601, and the hydrogen booster pump 603 is connected to the ship engine 7; the hydrogen booster pump 603 is a device specially used to increase the hydrogen pressure. Its main function is to effectively pressurize the hydrogen through compressed air or other driving gases to ensure the purity and safety of the hydrogen.

[0033] like Figure 1 As shown, in this embodiment, the hydrogen water washing and dehydration tank 601 is connected to the fresh water supply system 10 through the fresh water pump 9, and the hydrogen water washing and dehydration tank 601 and the hydrogen condensation and dehydration buffer tank 602 are connected to the wastewater discharge system 11 through a valve.

[0034] like Figure 1As shown, in this embodiment, the ship engine 7 is connected to a fuel supply system 12 and an air supply system 13; the fuel supply system of the ship engine 7 is a key component to ensure the normal navigation and efficient operation of the ship. It is responsible for transporting the fuel from the storage location to the engine and effectively burning it inside the engine. The air supply system plays a vital role in the ship engine 7. It provides the engine with necessary oxygen to ensure that the fuel can be fully burned.

[0035] The technical solution provided by the present invention utilizes offshore wind tubes to rotate wind tube power generation modules, while generating electricity and electrolyzing seawater to produce hydrogen, which is supplied to ship engines for combustion, thereby replacing part of traditional fuels and reducing engine carbon emissions. The highly alkaline seawater produced by seawater electrolysis is used for carbon capture, and the chlorine produced by electrolysis is mixed with seawater to eliminate the harm of marine organisms to ships. This process can realize the energy of the entire process, completely use renewable energy, reduce the dependence of the desulfurization and decarbonization system on public works, reduce the dependence on chemicals, and reduce the fossil fuels used by ships.

[0036] In addition, by installing wind tubes to generate electricity and utilize renewable energy to electrolyze seawater to produce hydrogen, wind energy can be converted into energy to supply ships for combustion to reduce carbon emissions. The wind tubes can also be used to reduce ship resistance, and the alkaline solution produced by electrolysis is used for ship desulfurization and decarbonization, and the chlorine gas produced is used to prevent marine life. The system realizes the conversion of renewable energy and utilizes by-products to complete the environmental protection treatment of ship exhaust gas and prevent marine life, thereby realizing a set of system equipment to achieve multiple functions, which can save energy and reduce emissions while reducing investment.

[0037] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0038] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A process for decarbonizing the residual high alkaline electrolyte of ship engines by electrolyzing seawater to produce hydrogen, characterized in that: Based on the seawater electrolysis system, the process includes the following steps: Step 1: Remove impurities from the seawater by filtering it through the primary filter (304) and the precision filter (302) through the seawater pump (303), and then the seawater enters the seawater concentration membrane (301) for concentration, and the concentrated seawater is sent to the electrolytic cell module group (1); Step 2: installing a wind tube power generation module (203) on the ship platform at the top of the ship deck, and storing the generated electricity in the battery energy storage module group (202) as the wind tube of the wind tube power generation module (203) rotates. The battery energy storage module group (202) then supplies power to the electrolyzer module group (1) to electrolyze seawater; Step 3: The hydrogen generated by electrolysis first enters the hydrogen water washing and dehydration tank (601), and the water washing hydrogen removes chloride ions in the hydrogen. Since a wire mesh demister is arranged on the top of the hydrogen water washing and dehydration tank (601) for dehydrating the hydrogen, the dehydrated hydrogen enters the hydrogen condensation and dehydration buffer tank (602). The hydrogen that has been condensed and deeply dehydrated is sent to the hydrogen ship engine (7) by the hydrogen booster pump (603) for combustion, and the flue gas generated by the combustion is sent to the ship engine desulfurization and decarbonization tower (8); Step 4: Start the seawater electrolyte delivery pump (402) to deliver the electrolytic alkali solution in the buffer tank (401). Part of the alkali solution is delivered to the gas-water mixer (5) to mix with the chlorine gas and seawater produced by electrolysis. After mixing, a disinfectant is produced for preventing marine organisms. The remaining alkali solution is delivered to the desulfurization and decarbonization tower (8). The desulfurization and decarbonization tower (8) adopts wet desulfurization technology. The internal spray tower structure of the desulfurization and decarbonization tower (8) realizes effective absorption and treatment of harmful gases.

2. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 1, characterized in that: The seawater electrolysis system comprises an electrolytic cell module group (1), a power supply system (2), a seawater pumping pipeline (3), an electrolyte delivery pipeline (4), a gas-water mixer (5), an elution pipeline (6), a ship engine (7) and a desulfurization and decarbonization tower (8), wherein the output end of the gas-water mixer (5) is used for ship antifouling and marine life prevention, and the flue gas output end of the ship engine (7) is connected to the ship engine desulfurization and decarbonization tower (8).

3. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 2, characterized in that: The power supply system (2) comprises a power supply (201), a battery energy storage module group (202) and a wind tube power generation module (203) which are connected in sequence, and the power supply (201) is connected to the electrolytic cell module group (1).

4. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 3, characterized in that: The seawater pumping pipeline (3) comprises a seawater concentration membrane (301), a precision filter (302), a seawater pump (303) and a primary filter (304) connected in sequence, the other end of the seawater concentration membrane (301) is connected to the electrolyzer module group (1), and the seawater pump (303) is used to extract seawater.

5. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 4, characterized in that: The electrolyte delivery pipeline (4) comprises a buffer tank (401) and an electrolyte delivery pump (402) which are connected in sequence, the buffer tank (401) being connected to the electrolytic cell module group (1), and the electrolyte delivery pump (402) being connected to the gas-water mixer (5) and the decarbonization spray of the desulfurization and decarbonization tower (8).

6. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 5, characterized in that: The gas-water mixer (5) is connected to the seawater pump (303), the electrolyzer module group (1) and the desulfurization spray of the desulfurization and decarbonization tower (8).

7. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 6, characterized in that: A first valve is installed between the gas-water mixer (5) and the seawater pump (303), and a second valve is installed between the gas-water mixer (5) and the electrolyte delivery pump (402).

8. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 7, characterized in that: The elution pipeline (6) comprises a hydrogen water washing and dehydration tank (601), a hydrogen agglomeration and dehydration buffer tank (602), and a hydrogen booster pump (603) which are connected in sequence; the hydrogen output end of the electrolyzer module group (1) is connected to the hydrogen water washing and dehydration tank (601), and the hydrogen booster pump (603) is connected to the ship engine (7).

9. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 8, characterized in that: The hydrogen water washing and dehydration tank (601) is connected to a fresh water supply system (10) via a fresh water pump (9), and the hydrogen water washing and dehydration tank (601) and the hydrogen condensation and dehydration buffer tank (602) are connected to a wastewater discharge system (11) via a valve.

10. The process for decarbonizing the residual high alkaline electrolyte for supplying ship engines by seawater electrolysis hydrogen according to claim 9, characterized in that: The ship engine (7) is connected to a fuel supply system (12) and an air supply system (13).

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