A deep-sea mining pneumatic lifting device system and method based on in-situ water electrolysis

Abstract

The application provides a deep-sea mining pneumatic lifting device system and method based on in-situ water electrolysis, the deep-sea mining pneumatic lifting device system comprises a mineral collection device, a conveying pipeline, a relay station, a lifting pipeline and a bypass electrolysis device; the mineral collection device, the conveying pipeline, the relay station and the lifting pipeline are sequentially connected; the lifting pipeline is provided with an aeration module; the bypass electrolysis device comprises a seawater taking pipeline, an electrolysis cavity and a hydrogen gas conveying module which are sequentially connected; the seawater taking pipeline is connected with the lower part of the lifting pipeline; the hydrogen gas conveying module is connected with the aeration module. The deep-sea mining pneumatic lifting device system based on in-situ water electrolysis changes the traditional mode of conveying compressed air from the water surface by setting the bypass electrolysis device, generates lifting gas in-situ in the lifting pipeline, has high energy utilization efficiency and stable and reliable operation, and is suitable for wide range of popularization and application.

Description

Technical Field

[0001] This application relates to the field of deep-sea mineral resource mining technology, and in particular to a deep-sea mining pneumatic lifting device system and method based on in-situ water electrolysis. Background Technology

[0002] The deep sea contains abundant polymetallic nodules, cobalt-rich crusts, and hydrothermal sulfides, among other mineral resources. The core technological challenge lies in efficiently, economically, and environmentally transporting these seabed minerals to surface-mounted ore collection vessels. Currently, there are two main pipeline lifting technologies used both domestically and internationally: Hydraulic pipeline lifting: This method uses a high-powered pump to generate an upward water flow in a pipeline, carrying mineral particles. This technology is currently the subject of much research.

[0003] Traditional pneumatic pipeline lifting: Compressed air is injected into the lower part of the lifting pipeline from a surface vessel through a separate air supply pipeline. The air dissolves under high pressure at depth, and as it rises through the pipeline, the pressure decreases, causing the gas to expand and form a three-phase mixture of gas, water, and solid. This reduces the mixture density and generates lifting force.

[0004] However, the hydraulic pipeline lifting pump requires huge power consumption and is bulky. In addition, the high hardness and sharp edges of deep-sea mineral particles place extremely high demands on the wear resistance of the pump impeller and pump casing, which can easily lead to frequent equipment replacement and high maintenance costs.

[0005] Traditional pneumatic pipeline lifting requires a long, complex air supply pipeline capable of withstanding immense seawater pressure, resulting in high initial investment and operating costs. The delivery of compressed air from the water surface to the lower part of the pipeline, thousands of meters deep, involves significant energy loss along the way, leading to low energy utilization efficiency. Long-distance air supply pipelines are prone to blockage under high pressure, posing a significant challenge to the overall reliability of the system.

[0006] Therefore, it is of great significance to develop a deep-sea mining pneumatic lifting system that is simple in structure, highly efficient in energy utilization, stable and reliable in operation, easy to control, and capable of safely disposing of lifting gases. Summary of the Invention

[0007] In view of the problems existing in the prior art, this application provides a deep-sea mining pneumatic lifting device system and method based on in-situ water electrolysis. By reasonably setting up a bypass electrolysis device, the traditional mode of transporting compressed air from the water surface is changed. Lifting gas is generated in-situ in the lifting pipeline, which has high energy utilization efficiency and stable and reliable operation, and is suitable for wide-ranging application.

[0008] To achieve this objective, the following technical solution is adopted in this application: In a first aspect, this application provides a deep-sea mining pneumatic lifting device system based on in-situ water electrolysis, the deep-sea mining pneumatic lifting device system including a mineral collection device, a conveying pipeline, a relay station, a lifting pipeline and a bypass electrolysis device; The mineral collection device, the conveying pipeline, the relay station, and the lifting pipeline are connected in sequence; an air supply module is installed on the lifting pipeline. The bypass electrolysis device includes a seawater intake pipe, an electrolysis chamber, and a hydrogen delivery module connected in sequence; the seawater intake pipe is connected to the lower part of the lifting pipe; and the hydrogen delivery module is connected to the gas filling module.

[0009] The deep-sea mining pneumatic lifting system based on in-situ water electrolysis described in this application includes a bypass electrolysis device. This bypass electrolysis device electrolyzes seawater to produce hydrogen, which is then used as the lifting gas and fed into the lifting pipeline via a gas supply module. This achieves pneumatic lifting of deep-sea slurry, avoiding the significant energy loss associated with existing pneumatic lifting devices that compress air and pump it over long distances to the lower part of the lifting pipeline. Furthermore, the bypass electrolysis device is isolated from the high-wear, high-clogging-risk deep-sea slurry flow. The generated hydrogen is delivered to the lifting pipeline via a hydrogen delivery module, forming a gas-liquid-solid three-phase flow, greatly improving the system's operational lifespan and reliability in the harsh deep-sea environment.

[0010] The mineral collection device described in this application can be a mineral collection machine that moves on the seabed to collect minerals; it has a built-in crusher to crush mineral particles.

[0011] In some embodiments, the deep-sea mining pneumatic lifting system also includes a hydrogen collection and safe handling device.

[0012] In some embodiments, the hydrogen collection and safe handling device is installed on a marine ore collection vessel.

[0013] In some embodiments, the hydrogen collection and safe treatment device is connected to the outlet of the lifting pipeline, which avoids the mixing of hydrogen with the atmosphere, eliminates safety hazards in the sea surface operation area, and realizes full-process safety control.

[0014] In some embodiments, the hydrogen collection and safe treatment device includes a gas-liquid separation device, a hydrogen buffer device, a hydrogen treatment and utilization device, and a hydrogen concentration monitoring device.

[0015] In some embodiments, the gas-liquid separation device, the hydrogen buffer device, and the hydrogen treatment and utilization device are connected in sequence.

[0016] The gas-liquid separation device described in this application can be a gravity separation device, a centrifugal gas-liquid separator, or a membrane separation device; the separated hydrogen can be directly injected into the fuel cell system of the mineral extraction device to generate electricity. The hydrogen buffer device is used to temporarily store the separated hydrogen, balance the gas pressure fluctuations in the system, and provide a stable gas source for subsequent processing.

[0017] In some embodiments, the hydrogen concentration monitoring device is installed on top of the gas-liquid separation device and on the ore collection vessel at sea to monitor the hydrogen concentration in the environment in real time. Once the concentration exceeds the safety threshold, an alarm is automatically triggered, and an emergency ventilation system can be activated depending on the actual device configuration.

[0018] In some embodiments, the hydrogen treatment and utilization device includes a catalytic combustion device and / or a hydrogen storage and utilization device. The catalytic combustion device, under the action of a catalyst (such as platinum or palladium), causes hydrogen to react with oxygen in the air at low temperature to produce water, achieving safe, flameless combustion with recoverable heat. The hydrogen storage and utilization device compresses hydrogen and stores it in a high-pressure cylinder for use as fuel in the power generation or propulsion system of the ore collection vessel, achieving energy recovery and further improving overall energy efficiency.

[0019] The bypass electrolysis device described in this application further includes a safety monitoring module. The safety monitoring module includes a hydrogen concentration sensor, a pressure sensor, and a temperature sensor. The safety monitoring module is located above the gas supply module of the booster pipeline.

[0020] When the gas in the booster pipeline includes hydrogen and air, in order to avoid the risk of explosion after hydrogen and air mix, a safety monitoring module is used to monitor the hydrogen concentration, pressure and temperature of the booster pipeline in real time. When the hydrogen volume concentration exceeds the safety threshold, the relay station reduces or cuts off the power supply to the bypass electrolysis device and issues an alarm. Depending on the actual device configuration, the emergency ventilation system can be activated.

[0021] In some embodiments, the electrolysis chamber is provided with an electrode assembly and an ion separator to form a cathode chamber and an anode chamber.

[0022] The electrolysis chamber described in this application is a closed, pressure-resistant container. The electrode assembly includes an anode plate, a cathode plate, and a bipolar plate. The material of the electrode plates is not specifically limited, as long as they are resistant to seawater corrosion and have good electrical conductivity. An exemplary solution is to use a titanium-based anode coated with a noble metal oxide, such as a ruthenium-iridium coating, and a nickel-based alloy or platinum-titanium plated cathode. An ion-exchange membrane achieves complete separation of hydrogen and oxygen products, and a hydrogen concentration sensor is installed to actively monitor the hydrogen concentration, eliminating the risk of explosion within the pipeline at the source.

[0023] In some embodiments, the cathode chamber is connected to a hydrogen delivery module.

[0024] In some embodiments, the hydrogen delivery module includes a hydrogen gathering chamber, a pulse release valve, and a bubble forming device connected in sequence.

[0025] When the hydrogen pressure in the gas collection chamber reaches a set threshold, hydrogen "bubble clusters" are injected into the gas filling section of the lift pipe through a bubble forming device, generating initial upward momentum. The bubble forming device can be a nozzle, a porous baffle, or a microporous tube, etc.; any device that produces uniform microbubbles is acceptable.

[0026] In some embodiments, the anode chamber is connected to a marine ore collection vessel via a gas recovery pipeline, allowing the chlorine gas generated at the anode to be recovered and processed, thus achieving resource utilization without chemical pollution.

[0027] In some implementations, the relay station includes a slurry buffer and a power management module.

[0028] In some implementations, the power management module is connected to both the mineral extraction device and the bypass electrolysis device.

[0029] The slurry buffer tank described in this application is located inside the relay station, connecting the conveying pipeline and the lifting pipeline. It receives the slurry collected by the mineral collection device, preventing overload or flow interruption of the conveying pipeline and improving the continuity and stability of the deep-sea mining pneumatic lifting device system. The power management module is integrated inside the relay station and is used to convert the high-voltage DC power supplied from the water surface into high-current, low-voltage DC power required by the mineral collection device and the bypass electrolysis device.

[0030] In some embodiments, the number of bypass electrolysis devices is at least one set, such as one, two, five, six, or eight sets. Multiple sets of bypass electrolysis devices are arranged in sections along the axial direction of the lifting pipeline, and the spacing between adjacent bypass electrolysis devices is dynamically adjusted according to the water depth and pressure drop along the lifting pipeline. This application can maintain the continuous transport of mixed fluid within the lifting pipeline by increasing the number of electrolysis units.

[0031] In some embodiments, the diameter of the gas filling module is 30% to 50% larger than the diameter of the lifting pipe, for example, it can be 30%, 35%, 40%, 45%, 48%, or 50%.

[0032] In some embodiments, the inner wall of the gas filling module is provided with a wear-resistant layer, which includes a wear-resistant ceramic lining.

[0033] Secondly, this application also provides a deep-sea mining pneumatic boosting method based on in-situ water electrolysis, wherein the deep-sea mining pneumatic boosting method employs the deep-sea mining pneumatic boosting device system based on in-situ water electrolysis described in the first aspect; the deep-sea mining pneumatic boosting method includes the following steps: (1) The relay station supplies power to the bypass electrolysis device, and the seawater intake pipeline sends seawater into the electrolysis chamber for in-situ water electrolysis. The generated hydrogen enters the gas filling module through the hydrogen delivery module. (2) The deep-sea slurry collected by the mineral collection device enters the relay station and the lifting pipeline in sequence through the transport pipeline. Under the action of hydrogen transported by the gasification module, a gas-liquid-solid three-phase flow is formed and moves upward in the lifting pipeline to realize the gas-lifting of the deep-sea slurry.

[0034] The deep-sea mining pneumatic lifting method based on in-situ water electrolysis described in this application utilizes an electrolysis chamber to electrolyze seawater in situ. The seawater is electrolyzed in the cathode chamber to produce hydrogen gas (main reaction: 2H₂O + 2e⁻). - →H₂↑+2OH - The gas enters the gasification module via the hydrogen delivery module and mixes with the deep-sea slurry in the lift pipeline to form a gas-liquid-solid three-phase flow with a significantly reduced density. A pressure difference is created inside and outside the lift pipeline, driving the mixed fluid upward. As the three-phase flow moves upward, the environmental pressure continuously decreases, and the gas originally dissolved in the seawater will continuously and dynamically precipitate out, forming new microbubbles. These bubbles expand continuously as they rise, providing stable buoyancy throughout the lift pipeline, ultimately achieving gas-powered lifting of the deep-sea slurry.

[0035] In some implementations, in step (1), the hydrogen generation rate is controlled by adjusting the electrical energy supplied by the relay station to the bypass electrolysis device, thereby controlling the deep-sea slurry gas lifting speed.

[0036] The main products generated in the anode chamber of the electrolytic chamber described in this application are oxygen and chlorine (side reaction: 2Cl). - -2e - →Cl2↑), the chlorine-containing mixed gas generated in the electrolysis chamber is transported through a recovery pipeline to a chlorine recovery and harmless treatment device on a marine ore collection vessel for processing.

[0037] In some embodiments, the chlorine-containing mixed gas generated in the electrolysis chamber in step (1) is transported through a recovery pipeline to a chlorine recovery and harmless treatment device on a marine ore collection vessel for processing.

[0038] In some embodiments, the deep-sea slurry containing hydrogen at the outlet of the lifting pipeline in step (2) enters the hydrogen collection and safe treatment device, and is successively subjected to gas-liquid separation treatment, hydrogen buffering and stabilization, and hydrogen treatment and utilization; the hydrogen concentration monitoring device monitors the hydrogen concentration at the top of the gas-liquid separation device and the ore collection vessel on the sea surface.

[0039] In this application, hydrogen-containing deep-sea slurry can undergo gas-liquid separation in a gas-liquid separator. Within the separator, hydrogen is efficiently separated from the slurry through gravity settling and baffle deflection, accumulating at the top of the separator. The separated slurry (seawater and minerals) is discharged from the bottom and proceeds to subsequent dehydration and storage processes. The accumulated hydrogen is then pressurized in a hydrogen buffer unit and subsequently sent to a hydrogen treatment and utilization unit for further processing. It can be safely combusted in a catalytic combustion unit to produce water, or it can be directly compressed and stored for energy use. Throughout the entire process, a hydrogen concentration monitoring device continuously monitors the hydrogen concentration in the deck area of ​​the ore-collecting vessel, ensuring that any leaks are detected and addressed promptly, completely eliminating the risk of fire or explosion caused by hydrogen mixing with air.

[0040] As a technical solution of this application, the deep-sea mining pneumatic boosting method includes the following steps: (1) The relay station supplies power to the bypass electrolysis device, and the seawater intake pipeline sends seawater into the electrolysis chamber for in-situ water electrolysis. The generated hydrogen enters the gas filling module through the hydrogen delivery module. The hydrogen generation rate is controlled by adjusting the power supplied by the relay station to the bypass electrolysis device, thereby controlling the deep-sea slurry gas lifting speed. The chlorine-containing mixed gas generated in the electrolysis chamber is transported to the chlorine recovery and harmless treatment device on the ore collection ship at sea through the recovery pipeline for treatment. (2) The deep-sea slurry collected by the mineral collection device enters the relay station and the lifting pipeline in sequence through the conveying pipeline. Under the action of hydrogen transported by the gasification module, a gas-liquid-solid three-phase flow is formed and moves upward in the lifting pipeline to realize the gas-lifting of the deep-sea slurry. The deep-sea slurry containing hydrogen enters the hydrogen collection and safe treatment device at the outlet of the lifting pipeline, and then undergoes gas-liquid separation, hydrogen buffering and stabilization, and hydrogen treatment and utilization in sequence; the hydrogen concentration monitoring device monitors the hydrogen concentration at the top of the gas-liquid separation device and the ore collection vessel on the sea surface.

[0041] Compared with the prior art, this application has at least the following beneficial effects: (1) The deep-sea mining pneumatic lifting device system based on in-situ water electrolysis provided in this application generates lifting gas in-situ in the lifting pipeline by setting up a bypass electrolysis device, which avoids the huge energy loss of compressing air and pumping it to the bottom of the pipeline over a long distance, thus achieving high energy utilization efficiency. The bypass electrolysis device and the gas filling module are isolated from the main slurry flow, which has high wear and high blockage risk, greatly improving the system's operating life and reliability in the harsh deep-sea environment.

[0042] (2) The deep-sea mining pneumatic lifting device system based on in-situ water electrolysis provided in this application avoids the safety hazards caused by the mixing of hydrogen with the atmosphere by setting up a hydrogen collection and safety treatment device, a hydrogen treatment and utilization device, a hydrogen concentration monitoring device and a gas recovery pipeline. It also recovers and utilizes the hydrogen and chlorine-containing mixed gas generated by electrolysis without chemical pollution. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of a deep-sea mining pneumatic lifting device system based on in-situ water electrolysis in a specific embodiment of this application.

[0044] Figure 2 This is a schematic diagram showing the connection between the electrolysis chamber, the hydrogen delivery module, and the gas recovery pipeline in a specific embodiment of this application.

[0045] In the diagram: 1-Mineral collection device; 2-Transportation pipeline; 3-Relay station; 4-Lifting pipeline; 41-Gas filling module; 51-Seawater intake pipeline; 52-Electrolysis chamber; 53-Gas recovery pipeline; 54-Safety monitoring module; 6-Ore collection vessel on the sea surface; 7-Ion membrane; 8-Hydrogen gathering chamber; 9-Pulse release valve; 10-Bubble forming device; 11-Anode plate; 12-Bipolar plate; 13-Cathode plate; 14-Seawater inlet. Detailed Implementation

[0046] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] The present application is described in further detail below. However, the examples below are merely simplified examples and do not represent or limit the scope of protection of the present application. The scope of protection of the present application shall be determined by the claims.

[0048] It should be understood that in the description of this application, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0049] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] Those skilled in the art should understand that this application necessarily includes the necessary pipelines, conventional valves and general pump equipment for achieving process integrity, but the above content is not the main inventive point of this application. Those skilled in the art can add layouts based on process flow and equipment structure selection, and this application does not make any special requirements or specific limitations in this regard.

[0051] As a specific embodiment of this application, a deep-sea mining pneumatic lifting device system based on in-situ water electrolysis is provided, the schematic diagram of which is shown below. Figure 1 As shown.

[0052] The deep-sea mining pneumatic lifting system includes a mineral collection device 1, a conveying pipeline 2, a relay station 3, a lifting pipeline 4, and a bypass electrolysis device.

[0053] The mineral extraction device 1, the conveying pipeline 2, the relay station 3, and the lifting pipeline 4 are connected in sequence. An air supply module 41 is installed on the lifting pipeline 4.

[0054] The bypass electrolysis device includes a seawater intake pipe 51, an electrolysis chamber 52, and a hydrogen delivery module connected in sequence. The seawater intake pipe 51 is connected to the lower part of the lift pipe 4. The hydrogen delivery module is connected to the gas supply module 41.

[0055] The deep-sea mining pneumatic lifting system also includes a hydrogen collection and safe treatment device.

[0056] The hydrogen collection and safe treatment device is installed on the offshore ore collection vessel 6. The hydrogen collection and safe treatment device is connected to the outlet of the lifting pipeline 4.

[0057] The hydrogen collection and safe treatment device includes a gas-liquid separation device, a hydrogen buffer device, a hydrogen treatment and utilization device, and a hydrogen concentration monitoring device.

[0058] The gas-liquid separation device, the hydrogen buffer device, and the hydrogen treatment and utilization device are connected in sequence.

[0059] The hydrogen concentration monitoring device is installed on the top of the gas-liquid separation device and on the ore collection vessel 6 at sea.

[0060] The hydrogen treatment and utilization device is a catalytic combustion device.

[0061] The bypass electrolysis device also includes a safety monitoring module 54.

[0062] The safety monitoring module 54 includes a hydrogen concentration sensor, a pressure sensor, and a temperature sensor.

[0063] The safety monitoring module 54 is installed above the gas filling module 41 of the lifting pipeline 4.

[0064] In this specific embodiment, the connection diagram between the electrolysis chamber, the hydrogen delivery module, and the gas recovery pipeline is shown below. Figure 2 As shown.

[0065] The electrolysis chamber 52 is equipped with an electrode assembly and an ion separator 7, forming a cathode chamber and an anode chamber. Figure 2 From left to right, the anode plate 11, bipolar plate 12 and cathode plate 13 are arranged in sequence, and 14 is the seawater inlet.

[0066] The cathode chamber is connected to the hydrogen delivery module.

[0067] The hydrogen delivery module includes a hydrogen gathering chamber 8, a pulse release valve 9, and a bubble forming device 10 connected in sequence. In this specific embodiment, the bubble forming device 10 is a nozzle.

[0068] The anode chamber is connected to the ore collection vessel 6 on the sea surface via a gas recovery pipeline 53.

[0069] The relay station 3 includes a slurry buffer and a power management module.

[0070] The power management module is connected to the mineral extraction device 1 and the bypass electrolysis device, respectively.

[0071] The number of bypass electrolysis devices is 1 set.

[0072] The diameter of the gas filling module 41 is 40% larger than that of the lifting pipe 4. The inner wall of the gas filling module 41 is provided with a wear-resistant layer.

[0073] As a specific embodiment of this application, a deep-sea mining pneumatic lifting method based on in-situ water electrolysis is also provided. The deep-sea mining pneumatic lifting method employs the aforementioned deep-sea mining pneumatic lifting device system based on in-situ water electrolysis. The deep-sea mining pneumatic lifting method includes the following steps: (1) The relay station 3 supplies power to the bypass electrolysis device, and the seawater intake pipe 51 sends seawater into the electrolysis chamber 52 for in-situ water electrolysis. The generated hydrogen enters the gas filling module 41 through the hydrogen delivery module. The hydrogen generation rate is controlled by adjusting the power supplied by the relay station 3 to the bypass electrolysis device, thereby controlling the deep-sea slurry gas lifting speed. The chlorine-containing mixed gas generated by the electrolysis chamber 52 is transported to the chlorine recovery and harmless treatment device on the sea surface ore collection vessel 6 through the recovery pipeline 53 for treatment. (2) The deep-sea slurry collected by the mineral collection device 1 enters the relay station 3 and the lifting pipeline 4 in sequence through the conveying pipeline 2. Under the action of hydrogen transported by the gasification module 41, a gas-liquid-solid three-phase flow is formed and moves upward in the lifting pipeline 4 to realize the gas-lifting of the deep-sea slurry. The deep-sea slurry containing hydrogen enters the hydrogen collection and safe treatment device at the outlet of the lifting pipeline 4, and then undergoes gas-liquid separation, hydrogen buffering and stabilization, and hydrogen treatment and utilization in sequence; the hydrogen concentration monitoring device monitors the hydrogen concentration at the top of the gas-liquid separation device and the ore collection vessel 6 on the sea surface.

[0074] In summary, the deep-sea mining pneumatic lifting device system based on in-situ water electrolysis provided in this application changes the traditional mode of transporting compressed air from the water surface. It realizes deep-sea mining pneumatic lifting through three major steps: in-situ electrolysis, mixing and dedensification, and pressure difference lifting. The deep-sea mining pneumatic lifting device system has a simple structure, high energy utilization efficiency, stable and reliable operation, is easy to control, and can safely handle the lifting gas, making it suitable for widespread application.

[0075] It is stated that this application illustrates the detailed structural features of the application through the above embodiments, but this application is not limited to the above detailed structural features, that is, it does not mean that this application must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to this application, equivalent substitutions of the components selected in this application, additions of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this application.

[0076] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

Claims

1. A deep-sea mining pneumatic lifting device system based on in-situ water electrolysis, characterized in that, The deep-sea mining pneumatic lifting system includes a mineral collection device, a conveying pipeline, a relay station, a lifting pipeline, and a bypass electrolysis device. The mineral collection device, the conveying pipeline, the relay station, and the lifting pipeline are connected in sequence; an air supply module is installed on the lifting pipeline. The bypass electrolysis device includes a seawater intake pipe, an electrolysis chamber, and a hydrogen delivery module connected in sequence; the seawater intake pipe is connected to the lower part of the lifting pipe; and the hydrogen delivery module is connected to the gas filling module.

2. The deep-sea mining pneumatic lifting device system according to claim 1, characterized in that, The deep-sea mining pneumatic lifting device system also includes a hydrogen collection and safe treatment device; And / or, the hydrogen collection and safe handling device is installed on a mining vessel at sea; And / or, the hydrogen collection and safe handling device is connected to the outlet of the booster pipe.

3. The deep-sea mining pneumatic lifting device system according to claim 2, characterized in that, The hydrogen collection and safe treatment device includes a gas-liquid separation device, a hydrogen buffer device, a hydrogen treatment and utilization device, and a hydrogen concentration monitoring device. And / or, the gas-liquid separation device, the hydrogen buffer device, and the hydrogen treatment and utilization device are connected in sequence; And / or, the hydrogen concentration monitoring device is installed on top of the gas-liquid separation device and on the ore collection vessel at sea.

4. The deep-sea mining pneumatic lifting device system according to claim 3, characterized in that, The hydrogen treatment and utilization device includes a catalytic combustion device and / or a hydrogen storage and utilization device.

5. The deep-sea mining pneumatic lifting device system according to any one of claims 1 to 4, characterized in that, The electrolysis chamber is equipped with an electrode assembly and an ion separator, forming a cathode chamber and an anode chamber. And / or, the cathode chamber is connected to the hydrogen delivery module; And / or, the hydrogen delivery module includes a hydrogen gathering chamber, a pulse release valve, and a bubble forming device connected in sequence; And / or, the anode chamber is connected to a marine ore collection vessel via a gas recovery pipeline.

6. The deep-sea mining pneumatic lifting device system according to any one of claims 1 to 5, characterized in that, The relay station includes a slurry buffer and a power management module; And / or, the power management module is connected to the mineral extraction device and the bypass electrolysis device, respectively; And / or, the number of bypass electrolysis devices is at least one set.

7. The deep-sea mining pneumatic lifting device system according to any one of claims 1 to 6, characterized in that, The diameter of the gas filling module is 30% to 50% larger than that of the lifting pipeline; And / or, the inner wall of the gas filling module is provided with a wear-resistant layer.

8. A deep-sea mining pneumatic lifting method based on in-situ water electrolysis, characterized in that, The deep-sea mining pneumatic lifting method employs the deep-sea mining pneumatic lifting device system based on in-situ water electrolysis as described in any one of claims 1 to 7; the deep-sea mining pneumatic lifting method includes the following steps: (1) The relay station supplies power to the bypass electrolysis device, and the seawater intake pipeline sends seawater into the electrolysis chamber for in-situ water electrolysis. The generated hydrogen enters the gas filling module through the hydrogen delivery module. (2) The deep-sea slurry collected by the mineral collection device enters the relay station and the lifting pipeline in sequence through the transport pipeline. Under the action of hydrogen transported by the gasification module, a gas-liquid-solid three-phase flow is formed and moves upward in the lifting pipeline to realize the gas-lifting of the deep-sea slurry.

9. The deep-sea mining pneumatic lifting method according to claim 8, characterized in that, In step (1), the hydrogen production rate is controlled by adjusting the electrical energy supplied by the relay station to the bypass electrolysis device, thereby controlling the deep-sea slurry gas lifting speed. And / or, the chlorine-containing mixed gas generated in the electrolysis chamber in step (1) is transported through a recovery pipeline to the chlorine recovery and harmless treatment device on the ore collection vessel at sea for treatment.

10. The deep-sea mining pneumatic lifting method according to claim 8 or 9, characterized in that, In step (2), the deep-sea slurry containing hydrogen from the outlet of the lifting pipeline enters the hydrogen collection and safety treatment device, and is successively subjected to gas-liquid separation, hydrogen buffering and stabilization, and hydrogen treatment and utilization; the hydrogen concentration monitoring device monitors the hydrogen concentration at the top of the gas-liquid separation device and the ore collection vessel on the sea surface.

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