A combined mining system and method suitable for deep-sea ore and gas energy

Abstract

The present invention relates to the technical field of deep-sea energy mining, and in particular to a combined mining system and method suitable for deep-sea ore and gas energy. It includes a seabed ore collection mechanism, an ore lifting mechanism, a mother ship, an ore separation mechanism, a gas collection mechanism, a gas storage mechanism, a water exchange mechanism and a gas recovery mechanism. The output end of the gas collection mechanism is connected to the gas storage mechanism and the ore lifting mechanism, and the gas-liquid mixed lifting of the ore is achieved through the compressed gas in the gas storage mechanism. The water exchange mechanism is close to the output end of the ore lifting mechanism and is connected to the ore lifting mechanism. The gas recovery mechanism is connected to the water exchange mechanism and the ore separation mechanism. The present invention can collect hydrogen while mining, and the ore is mixed and lifted by gas-liquid mixing through the collected hydrogen. The cost of the mining and gas production system is greatly reduced, and the lifting efficiency is improved. In addition, through the setting of the water exchange mechanism, the outlet speed is greatly slowed down, and the damage to the pipeline and the difficulty of nodule collection are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of deep-sea energy exploitation, and in particular to a combined exploitation system and method suitable for deep-sea ore and gas energy. Background Art

[0002] At present, with the growing global demand for sustainable energy and resources, people have begun to turn to the development of deep-sea resources, especially underutilized seabed mineral resources and natural hydrogen. Deep-sea mineral resources, including polymetallic nodules, cobalt-rich crusts and polymetallic sulfides, are rich in important metals such as manganese, cobalt and copper, which are important in high-tech industries, such as the manufacture of lithium-ion batteries and electronic devices. At the same time, marine natural hydrogen, as a clean energy source, has the advantages of low cost and environmental friendliness, and is regarded as an important supplement in the field of new energy.

[0003] Natural hydrogen on the seafloor is mainly produced by high-temperature reactions between water and iron-rich minerals such as olivine. These mineral deposits are mostly distributed in ultrabasic rocks in and near ocean rift zones. Current mining technology is still concentrated on land. According to relevant geological research, there are a large number of overlapping energy storage areas between polymetallic nodules and hydrogen sources at a depth of more than 6,000 meters on the deep seabed, which have good conditions for joint collection. Therefore, natural hydrogen resources in the ocean, especially those that overlap with the geographical location of polymetallic nodule mining areas, provide new mining opportunities.

[0004] The mining technology of deep-sea polymetallic nodules faces extreme deep-sea environmental challenges and requires effective ore lifting at a depth of 5,000 meters. Existing lifting technologies, such as hydraulic lifting systems, can complete the lifting task, but they require a large number of hydraulic pumps and a large amount of energy to drive the water pumps to generate sufficient pressure to lift the seabed ore to the surface. They have complex structures, high manufacturing costs, low lifting efficiency, and high energy consumption. In addition, noise and vibration may be generated during system operation, which may have an adverse impact on the marine ecology. Pneumatic lifting, by inputting compressed gas into the transport pipeline, uses the fluid potential energy difference inside and outside the pipeline and the kinetic energy of the gas to lift the minerals from the seabed to the sea surface. The structure of the pneumatic lifting system is relatively simple. However, during the pneumatic lifting process, as the depth decreases, the compressed gas gradually expands, which may cause impact on the pipeline and easily damage the pipeline. In addition, the air column formed by the mixture of gas, ore, and mud has a low density, and it is difficult to control it if it accelerates too fast, thus affecting the collection efficiency of the mother ship.

[0005] Therefore, these existing technologies urgently need further improvement and optimization. In order to solve these problems, new technical methods need to be explored and developed. Summary of the invention

[0006] In order to solve the shortcomings of the prior art, the present invention provides a combined mining system and method suitable for deep-sea ore and gas energy. The present invention can not only provide necessary industrial raw materials, but also promote the development of clean energy, which is of great significance for coping with the global energy crisis and promoting green economic growth.

[0007] The technical solution of the present invention is:

[0008] A combined mining system for deep-sea ore and gas energy, the system comprising a seabed ore collection mechanism, an ore lifting mechanism, a mother ship, an ore separation mechanism, a gas collection mechanism, a gas storage mechanism, a water exchange mechanism and a gas recovery mechanism; the ore separation mechanism, the gas storage mechanism and the gas recovery mechanism are arranged on the mother ship; the seabed ore collection mechanism is connected to the ore separation mechanism through the ore lifting mechanism; the output end of the gas collection mechanism is connected to the gas storage mechanism, and the gas storage mechanism is connected to the ore lifting mechanism, and the gas-liquid mixed lifting of the ore is achieved through the compressed gas in the gas collection mechanism; the water exchange mechanism is close to the output end of the ore lifting mechanism and is connected to the ore lifting mechanism, so as to slow down the speed of the ore at the output end of the ore lifting mechanism; the gas recovery mechanism is connected to the water exchange mechanism and the ore separation mechanism, and is used for recovering the gas in the water exchange mechanism and the ore separation mechanism.

[0009] Furthermore, the ore collection mechanism includes a seabed platform, an ore collection bin and a relay station; the ore collection bin is installed at the lower part of the seabed platform, and the outlet end of the ore collection bin is connected to the upper part of the relay station through an ore transfer pipeline; the relay station is a closed box with a conical bottom, and a first suction pump is provided on the pipeline between the relay station and the ore collection bin. The ore collected by the mining vehicle is pumped into the interior of the relay station through the ore collection bin and settles to the bottom of the relay station.

[0010] Furthermore, the gas collection mechanism includes a seabed gas production pipeline, a seabed gas production tree, a gas collection compressor, a booster pump and a collection tank; the gas enters the seabed gas production tree through the seabed gas production pipeline, and further enters the collection tank through the gas collection compressor and the booster pump; the compressed gas in the collection tank enters the ore lifting mechanism through a gas transmission pipeline, and the other part enters the gas storage mechanism.

[0011] Furthermore, the ore separation mechanism includes a collecting chamber, a transfer component, and a temporary storage area. The ore in the collecting chamber is transported to the temporary storage area through the transfer component; the collecting chamber is connected to the gas storage mechanism through a first gas recovery mechanism; when the ore does not enter the collecting chamber, the collecting chamber is in a vacuum state.

[0012] Furthermore, the first gas recovery mechanism includes a first gas collection tank, a first vacuum pump, a first transmission pipeline, and a first suction pump; the first vacuum pump reduces the pressure in the collection chamber to cause the gas in the seawater in the collection chamber to escape, and the escaped gas is sucked out by the first suction pump and enters the first gas collection tank through the first transmission pipeline.

[0013] Furthermore, the ore lifting mechanism includes a vertically arranged lifting pipe, the lower end of which passes through the top of the relay station and extends to the lower part of the relay station, and the outer wall of the lifting pipe is fixedly welded to the top wall of the relay station; the gas in the gas collection mechanism is compressed and enters the lifting pipe through a part of the gas transmission pipe.

[0014] Furthermore, the water exchange mechanism includes a water exchange pipe, which is cross-connected with the lifting pipe. The input end of the water exchange pipe is a water injection port connected to seawater, and the output end of the water exchange pipe is connected to a second gas recovery mechanism. The seawater in the water exchange pipe flows through the lifting pipe to slow down the lifted ore nodules and enters the ore separation mechanism with the ore; part of the gas in the lifting pipe enters the second gas recovery mechanism through the output end of the water exchange pipe; the second gas recovery mechanism is connected to the gas storage mechanism.

[0015] Furthermore, the gas is hydrogen; and the ore is manganese nodules.

[0016] A combined mining method for deep-sea minerals and gas energy includes the following steps:

[0017] Collect deep-sea ores through the deep-sea mining system and collect the ores to the relay station;

[0018] Gas is collected through a gas mining system; part of the gas collected through the gas mining system is directly transmitted to a gas storage mechanism, and the other part of the gas is compressed and passed into a deep-sea ore lifting pipeline, and the collected gas is mixed with seawater during the ore collection process to achieve gas-liquid mixing and lifting of deep-sea ore;

[0019] The speed of ore lifting is slowed down by inputting seawater near the output end of the lifting pipeline;

[0020] The transported ore and gas mixture are separated by an ore separation mechanism.

[0021] Furthermore, the speed of ore lifting is slowed down by inputting seawater near the output end of the lifting pipeline, specifically: a water exchange pipeline is set, the water exchange pipeline is cross-connected with the lifting pipeline, the input end of the water exchange pipeline is a water injection port, which is connected with seawater, and the output end of the water exchange pipeline is connected with the second gas recovery mechanism, the seawater in the water exchange pipeline flows through the lifting pipeline to slow down the lifted ore nodules, and enters the ore separation mechanism with the ore; part of the gas in the lifting pipeline enters the second gas recovery mechanism through the output end of the water exchange pipeline.

[0022] The beneficial effects achieved by the present invention are:

[0023] 1. The present invention is a combined mining system and method for deep-sea ore and gas energy, which can collect gas while mining. In addition, the collected gas is used for gas-liquid mixed lifting to lift the ore onto the mother ship, and the gas-liquid mixed transportation method is used to replace the traditional fluid transportation to enhance the efficiency of nodule transportation;

[0024] 2. The present invention provides a combined mining system and method for deep-sea ore and gas energy. Through the combined mining method of deep-sea gas energy and deep-sea ore, the dependence on external energy supply is reduced, and the air on the deck is compressed and transported to the pipeline to lift the nodule components, thereby enhancing the energy self-sufficiency of the nodule mining process, and also significantly reducing the cost and carbon emissions of the mining and gas production system;

[0025] 3. The present invention provides a system and method for the joint mining of deep-sea ores and gas energy, and is provided with a water-changing mechanism, which slows down the outlet speed, reduces damage to the pipeline and the difficulty of nodule collection. Deceleration effect: The water-changing mechanism is close to the output end of the lifting pipeline, and injects seawater to dilute the air and hydrogen in the lifting pipeline, slows down the lifting speed of the ore, and prevents the ore from hitting the pipeline at an excessively fast speed and causing damage. Gas recovery: The gas lost during the water-changing process is recovered by a second gas recovery mechanism, ensuring the effective use of the gas and reducing waste and environmental impact;

[0026] 4. The present invention is a combined mining system and method for deep-sea ore and gas energy, mainly for hydrogen combined mining. Hydrogen, due to its lower density, can provide buoyancy and reduce the resistance and energy consumption of ore during lifting. Compared with the traditional lifting of polymetallic nodules after air compression, it has a higher speed transportation effect, which has significant benefits in reducing the energy consumption of polymetallic nodule mining and improving mining efficiency.

[0027] The gas-liquid mixing method of collecting hydrogen from the seabed improves the lifting efficiency of the ore and avoids the complex process and high energy consumption of introducing compressed air from the ship surface in traditional fluid transportation. At the same time, the gas-liquid mixing method can reduce the danger of pure hydrogen transportation, especially the risk of explosion when collecting gas on the ship surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a structural schematic diagram of the device on the mother ship in the present invention.

[0030] Figure 3 It is a structural schematic diagram of the water changing structure in the present invention.

[0031] Figure 4 It is a schematic diagram of the combined transportation in the seabed ore-hydrogen pipeline of the present invention.

[0032] In the figure, 1. Seabed ore collection mechanism; 11. Seabed platform; 12. Ore confluence bin; 13. Relay station; 14. First suction pump; 15. Mining vehicle; 16. Water exchange mechanism; 2. Lifting pipeline; 21. Pressure relief device; 3. Gas collection mechanism; 31. Seabed gas pipeline; 32. Seabed gas tree; 33. Hydrogen collection compressor; 34. Booster pump; 35. Gas pressure sensor; 36. Safety valve; 37. Collection tank; 4. Gas storage mechanism; 5. Gas transmission pipeline; 6. Ore separation mechanism; 61. Collection chamber; 62. Transfer assembly; 63. Temporary storage area; 7. First gas recovery mechanism; 71. First gas collection tank; 72. First vacuum pump; 73. First transmission pipeline; 74. First suction pump; 8. Water exchange pipeline; 9. Second gas recovery mechanism; 91. Second gas collection tank; 92. Second vacuum pump; 93. Second transmission pipeline; 94. Second suction pump; 95. Filter membrane; 10. Mother ship. DETAILED DESCRIPTION

[0033] To facilitate those skilled in the art to understand the present invention, specific implementations of the present invention are described below with reference to the accompanying drawings.

[0034] like Figure 1-2 As shown, the present invention provides a system and method for joint mining of deep-sea ore and gas energy. The ore in this embodiment is manganese nodules, and the gas energy is hydrogen. It is mainly a system and method for joint mining of deep-sea manganese nodules and hydrogen energy. It includes a seabed ore collection mechanism 1, an ore lifting mechanism, a mother ship 10, an ore separation mechanism 6, a gas collection mechanism 3, a gas storage mechanism 4, a water exchange mechanism 16 and a gas recovery mechanism. The ore separation mechanism 6, the gas storage mechanism 4 and the gas recovery mechanism are arranged on the mother ship 10.

[0035] The seabed ore collection mechanism 1 includes a seabed platform 11, an ore collection bin 12 and a relay station 13. The seabed platform 11 is a steel structure support, the ore collection bin 12 is installed at the lower part of the seabed platform 11, and the outlet end of the ore collection bin 12 is connected to the upper part of the relay station 13 through an ore transfer pipeline. Specifically, the relay station 13 is a closed box with a conical bottom, and a first suction pump 14 is provided on the pipeline between the relay station 13 and the ore collection bin 12. The ore collected by the mining vehicle 15 is pumped into the interior of the relay station 13 through the ore collection bin 12 and settles to the bottom of the relay station 13.

[0036] The ore lifting mechanism includes a vertically arranged lifting pipeline 2, and the material of the lifting pipeline 2 is a nickel-based alloy to prevent hydrogen from making the material brittle and cracking. An epoxy resin coating is used inside to prevent corrosion, and a pressure relief device 21 is installed inside to deal with fire or explosion accidents that may be caused by hydrogen. At the same time, a gas detector and a pressure sensor are installed in the lifting pipeline 2 to monitor the integrity of the lifting pipeline 2 and the flow state of hydrogen in real time. The lower end of the lifting pipeline 2 passes through the top of the relay station 13 and extends to the lower part of the relay station 13. The outer wall of the lifting pipeline 2 is fixedly welded to the top wall of the relay station 13.

[0037] The gas collection mechanism 3 includes a submarine gas pipeline 31, a submarine gas tree 32, a hydrogen collection compressor 33, a booster pump 34, a gas pressure sensor 35, a safety valve 36 and a collection tank 37. The submarine gas tree 32 is installed on a deep-sea hydrogen well that has been evaluated, connected through the submarine gas pipeline 31, and the valve on the submarine gas tree 32 is used to control the gas collection system, slowly open the wellhead, and allow hydrogen to flow out slowly to avoid equipment damage or safety accidents caused by too fast pressure release. The gas flow and well pressure are managed by adjusting the valves and flow controllers on the submarine gas tree 32. Key parameters such as pressure, temperature and flow are monitored in real time to ensure that the wellhead operates under safe and optimal conditions. If abnormal pressure or other potential dangerous conditions are detected, the safety system of the submarine gas tree 32 will automatically close the wellhead to prevent accidents. The collected hydrogen is connected to the collection tank 37 through a pipeline. The pipeline is equipped with a hydrogen collection compressor 33 and a booster pump 34 to ensure the transportation of hydrogen in the pipeline. A gas pressure sensor 35 and a safety valve 36 are provided to monitor the integrity of the pipeline and the flow state of hydrogen in real time. The hydrogen entering the collection tank 37 is compressed by the compressor and enters the gas delivery pipeline 5. A section of the gas delivery pipeline 5 is connected to the lifting pipeline 2 and injected into the lifting pipeline 2 for gas-liquid mixing and lifting. At this time, the liquid is seawater mixed in deep-sea manganese nodules. Excess hydrogen enters the gas storage mechanism 4 for storage and collection. The gas delivery pipeline 5 is provided with a one-way valve.

[0038] The top of the ore separation mechanism 6 and the lifting pipeline 2 are respectively connected to one side of the two ore separation mechanisms 6 through a three-way solenoid valve. Each ore separation mechanism 6 is internally divided into a collecting chamber 61, a transfer component 62, and a temporary storage area 63. One side of the collecting chamber 61 is connected to the lifting pipeline 2, and the transfer component 62 is located in the collecting chamber 61. The collecting chamber 61 is connected to the gas storage mechanism 4 through the first gas recovery mechanism 7. The collecting chamber 61 is located on the side close to the three-way solenoid valve, and a seawater discharge pipe is provided at the bottom. A first solenoid gate valve is installed on the seawater discharge pipe, and the signal end of the gate valve is connected to the electronic control unit. The collecting chamber 61 is connected to the temporary storage area 63, and an inclined water filter plate is provided at the end of the temporary storage area 63. A sealed hatch is provided on the side wall of the collecting chamber 61 close to the temporary storage area 63, through which the ore can be discharged. In addition, the transfer component 62 is installed at the bottom of the collecting chamber 61. A first gas recovery mechanism 77 is disposed on one side of each collection box 61. The first gas recovery mechanism 77 includes a first gas collection tank 71, a first vacuum pump 72, a first transmission pipeline 73 and a first suction pump 74. The first vacuum pump 72 reduces the pressure of the collection chamber 61 to cause the gas in the seawater in the collection chamber 61 to escape. The escaped gas is sucked out by the first suction pump 74 and enters the gas storage mechanism 4 through the pipeline. A pressure sensor is disposed on the top of the collection chamber 61, and a liquid level sensor is disposed on the upper inner wall thereof. The signal ends of the pressure sensor and the liquid level sensor are respectively connected to the electronic control unit for communication.

[0039] Before the seawater enters, the collection box 61 is in a sealed state. First, the first vacuum pump 72 evacuates the interior thereof. Hydrogen gas of 2 to 3 atmospheres is injected, and then the seawater containing hydrogen and the crushed ore it carries are introduced into the collection chamber 61. In this process, the transfer assembly 62 transports the crushed ore on the surface of the collection chamber 61 to the internal temporary storage area 63. Hydrogen gas mainly gathers in the upper part of the collection chamber 61, and is finally guided to the gas storage mechanism 4 for storage and collection through a pipeline. When the seawater level in the collection chamber 61 reaches the height set by the liquid level sensor, the liquid level sensor sends a signal to the electronic control unit, and then the electronic control unit instructs to close the water inlet of the collection chamber 61. The seawater discharge pipe at the bottom of the collecting chamber 61 discharges the seawater inside it. After the seawater is discharged, the sealed door is opened to discharge the crushed ore from the temporary storage area 63. Then the sealed door is closed, and the interior of the collecting chamber 61 is evacuated again to remove the air that enters the collecting chamber 61 through the sealed door. The compressor injects 2 to 3 atmospheres of hydrogen into the collecting chamber 61 to prepare for receiving seawater and crushed ore again.

[0040] The water exchange mechanism 16 includes a water exchange pipeline 8, which is cross-connected with the lifting pipeline 2. The input end of the water exchange pipeline 8 is a water injection port, which is connected to seawater. The output end of the water exchange pipeline 8 is connected to the second gas recovery mechanism 9. The seawater in the water exchange pipeline 8 flows through the lifting pipeline 2 to decelerate the ore nodules lifted up, and enters the ore separation mechanism 6 with the ore; part of the gas in the lifting pipeline 2 enters the second gas recovery mechanism 9 through the output end of the water exchange pipeline 8; the second gas recovery mechanism 9 is connected to the gas storage mechanism 4. The water exchange pipeline 8 sucks seawater to exchange the water in the lifting pipeline 2, dilutes the air in the lifting pipeline 2, and reduces the outlet speed to prevent the mineral speed from impacting the lifting pipeline 2 too fast. Because the water exchange will also lose some hydrogen, the exchanged seawater is collected, specifically the seawater is collected in the second gas recovery mechanism 9, and the hydrogen brought out of the seawater after the water exchange is recovered. A one-way valve is set in the water exchange pipeline 86. Specifically, the second gas recovery mechanism 9 includes a second gas collection tank 91, a second vacuum pump 92, a second transmission pipeline 93 and a second suction pump 94. The second vacuum pump 92 reduces the pressure of the collection chamber 61 to cause the gas in the seawater in the collection chamber 61 to escape, and the escaped gas is sucked out by the second suction pump 94 and enters the second gas collection mechanism 42 through the second transmission pipeline 93. There is a filter membrane 95 between the second gas collection tank 91 and the gas storage mechanism 4 to prevent seawater from passing through. A drain port is provided in the second gas collection tank 91, and the sucked seawater is discharged into the sea through the drain port.

[0041] All sensors and valves in the system can be detected by the surface mother ship 10, and the detection results are used to change the flow rate and pressure in the pipeline, and the safety of the lifting process is guaranteed to a certain extent.

[0042] It should be noted that many specific details are set forth in the above description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0043] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

Claims

1. A combined mining system for deep-sea ore and gas energy, characterized by: The system comprises a seabed ore collection mechanism (1), an ore lifting mechanism, a mother ship (10), an ore separation mechanism (6), a gas collection mechanism (3), a gas storage mechanism (4), a water exchange mechanism (16) and a gas recovery mechanism; the ore separation mechanism (6), the gas storage mechanism (4) and the gas recovery mechanism are arranged on the mother ship (10); the seabed ore collection mechanism (1) is connected to the ore separation mechanism (6) via the ore lifting mechanism; the output end of the gas collection mechanism (3) is connected to the gas storage mechanism (4), and the gas storage mechanism (4) is connected to the ore lifting mechanism, and the gas-liquid mixed lifting of the ore is achieved through the compressed gas in the gas collection mechanism (3); the water exchange mechanism (16) is close to the output end of the ore lifting mechanism and is connected to the ore lifting mechanism, so as to slow down the speed of the ore at the output end of the ore lifting mechanism; the gas recovery mechanism is connected to the water exchange mechanism (16) and the ore separation mechanism (6), and is used to recover the gas in the water exchange mechanism (16) and the ore separation mechanism (6).

2. A combined mining system for deep-sea ore and gas energy according to claim 1, characterized in that: The seabed ore collection mechanism (1) comprises a seabed platform (11), an ore collection bin (12) and a relay station (13); the ore collection bin (12) is installed at the bottom of the seabed platform (11), and the outlet end of the ore collection bin (12) is connected to the upper part of the relay station (13) through an ore transfer pipeline; the relay station (13) is a closed box with a conical bottom, and a first suction pump (14) of the seabed ore collection mechanism is arranged on the pipeline between the relay station (13) and the ore collection bin (12); the ore collected by the mining vehicle (15) is pumped into the interior of the relay station (13) through the ore collection bin (12), and sinks to the bottom of the relay station (13).

3. A combined mining system for deep-sea ore and gas energy according to claim 1, characterized in that: The gas collection mechanism (3) comprises a seabed gas collection pipeline (31), a seabed gas tree (32), a gas collection compressor, a booster pump (34) and a collection tank (37); gas enters the seabed gas tree (32) through the seabed gas collection pipeline (31), and further enters the collection tank (37) through the gas collection compressor and the booster pump (34); compressed gas in the collection tank (37) enters the ore lifting mechanism through a gas transmission pipeline (5), and the other part enters the gas storage mechanism (4).

4. A combined mining system for deep-sea ore and gas energy according to claim 1, characterized in that: The ore separation mechanism (6) comprises a collection chamber (61), a transfer assembly (62), and a temporary storage area (63); the ore in the collection chamber (61) is transported to the temporary storage area (63) via the transfer assembly (62); the collection chamber (61) is connected to the gas storage mechanism (4) via the first gas recovery mechanism (7); when the ore does not enter the collection chamber (61), the collection chamber (61) is in a vacuum state.

5. A combined mining system for deep-sea ore and gas energy according to claim 4, characterized in that: The first gas recovery mechanism (7) comprises a first gas collection tank (71), a first vacuum pump (72), a first transmission pipeline (73), and a first suction pump (74) of the first gas recovery mechanism; the first vacuum pump (72) reduces the pressure of the collection chamber (61) to cause the gas in the seawater in the collection chamber (61) to escape, and the escaped gas is sucked out by the first suction pump (74) and enters the first gas collection tank (71) through the first transmission pipeline (73).

6. A combined mining system for deep-sea ore and gas energy according to claim 2, characterized in that: The ore lifting mechanism comprises a vertically arranged lifting pipeline (2), the lower end of which passes through the top of the relay station (13) and extends to the lower part of the relay station (13), and the outer wall of the lifting pipeline (2) and the top wall of the relay station (13) are fixedly welded to form a whole; the gas in the gas collection mechanism (3) is compressed and enters the lifting pipeline (2) through a part of the gas transmission pipeline (5).

7. A combined mining system for deep-sea ore and gas energy according to claim 6, characterized in that: The water exchange mechanism (16) comprises a water exchange pipeline (8), the water exchange pipeline (8) is cross-connected with the lifting pipeline (2), the input end of the water exchange pipeline (8) is a water injection port connected with seawater, the output end of the water exchange pipeline (8) is connected with the second gas recovery mechanism (9), the seawater in the water exchange pipeline (8) flows through the lifting pipeline (2) to decelerate the lifted ore nodules, and enters the ore separation mechanism (6) along with the ore; part of the gas in the lifting pipeline (2) enters the second gas recovery mechanism (9) through the output end of the water exchange pipeline (8); the second gas recovery mechanism (9) is connected with the gas storage mechanism (4).

8. A combined mining system for deep-sea ore and gas energy according to any one of claims 1 to 7, characterized in that: The gas is hydrogen; the ore is manganese nodules.

9. A combined mining method for deep-sea ore and gas energy, characterized in that: Using a combined mining system for deep-sea ore and gas energy as described in any one of claims 1 to 7, comprising the following process: Collect deep-sea ores through the deep-sea mining system and collect the ores to the relay station; Gas is collected through a gas mining system; part of the gas collected through the gas mining system is directly transmitted to a gas storage mechanism, and the other part of the gas is compressed and passed into a deep-sea ore lifting pipeline, and the collected gas is mixed with seawater during the ore collection process to achieve gas-liquid mixing and lifting of deep-sea ore; The speed of ore lifting is slowed down by inputting seawater near the output end of the lifting pipeline; The transported ore and gas mixture are separated by an ore separation mechanism.

10. A combined mining method for deep-sea ore and gas energy according to claim 9, characterized in that: The method of slowing down the ore lifting speed by inputting seawater near the output end of the lifting pipeline is specifically as follows: a water exchange pipeline is set, the water exchange pipeline is cross-connected with the lifting pipeline, the input end of the water exchange pipeline is a water injection port, which is connected with seawater, and the output end of the water exchange pipeline is connected with the second gas recovery mechanism, the seawater in the water exchange pipeline flows through the lifting pipeline to slow down the lifted ore nodules, and enters the ore separation mechanism with the ore; part of the gas in the lifting pipeline enters the second gas recovery mechanism through the output end of the water exchange pipeline.

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