Seabed carbon storage equipment and method for deep-sea CO2 jet mining

Abstract

The present invention discloses a seabed carbon sequestration equipment and method for deep-sea CO2 jet mining. It includes an intelligent monitoring system for a mining ship platform, a multi-pipeline suction device, an intelligent drive control mechanism, and a CO2 injection and sequestration device. The intelligent monitoring system for the mining ship platform includes a flow meter, a pressure sensor, and a control system. The multi-pipeline suction device is connected to a mining vehicle, and includes a CO2 inlet device, a suction pump, a filter device, and a CO2 storage tank. The suction pump is connected to the CO2 inlet device and the filter device; the multi-pipeline suction device is connected to the CO2 injection and sequestration device through a telescopic hose. The CO2 injection and sequestration device is connected to an intermediate cabin, and includes a CO2 transfer box, an emergency shut-off valve, a telescopic pipeline, a CO2 injection pipeline, and a drill bit. The present invention provides a complete set of equipment and methods for carbon capture, treatment, injection, and sequestration after CO2 jet mining, which ensures the fixation of the sediment sequestration position and realizes seabed mining and CO2 seabed sequestration.

Description

Technical Field

[0001] The present invention relates to the field of deep-sea mining and seabed carbon sequestration engineering technology and equipment, and in particular to a seabed carbon sequestration equipment and method for deep-sea CO2 jet mining. Background Art

[0002] Research shows that CCS has become a key measure for achieving carbon emission reduction, and CO2 ocean storage is the most promising method for achieving CO2 emission reduction in CCS technology. Compared with land-based carbon storage, seabed carbon storage is far away from human settlements, surface water bodies and groundwater layers on which humans depend for survival, and is safer and has less environmental risks.

[0003] The saline layer for storing CO2 is located 800-900 meters below the seabed. First, the regional connectivity is very good, and the injected gas will not cause local high pressure; second, the water layer is covered with a thick mud protective layer, which is very airtight and it is difficult for CO2 to seep out, so it has good sealing properties. On a time scale, the stored CO2 will also undergo mineralization reactions with water and rocks. Most of the CO2 will be solidified in the rocks, and a small part of the CO2 will dissolve in the formation water. The storage is safe and long-term. The deep sea is rich in metal mineral resources, including polymetallic nodules, polymetallic sulfides, and cobalt-rich crusts. Hydraulic ore collection is one of the main methods of deep-sea mining. Hydraulic ore collection uses water flow to separate and move nodules on the surface of seabed sediments. Compared with water jets, liquid CO2 jets have the advantages of lower pressure reduction rate, faster jet speed, and higher energy. This paper proposes a seabed carbon storage equipment and method for deep-sea CO2 jet mining based on liquid CO2 jet mining.

[0004] The existing carbon storage devices in the field of deep-sea mining have the following problems:

[0005] 1. Existing equipment involved in CO2 deep-sea polymetallic nodule collection focuses on improving collection efficiency or plume management, but carbon sequestration after jet collection is also a technical difficulty that urgently needs a breakthrough; there is almost no complete set of equipment for carbon capture, treatment, injection and storage after CO2 jet collection.

[0006] 2. Currently, the storage technology for CO2 after jet collection of deep-sea polymetallic nodules is focused on water column storage, but the water column storage time is short. CO2 is likely to change and migrate with the ocean circulation and eventually leave the ocean water body and return to the atmosphere, making permanent storage impossible. There is a gap in sediment storage technology.

[0007] 3. The deep-sea sediment storage technology cannot achieve “collecting and storing at the same time”, and it is difficult to ensure the continuity of CO2 storage.

[0008] 4. It is difficult to efficiently process CO2 during the seabed collection process of deep-sea carbon storage devices, which can easily lead to the injection of CO2 mixed with sediments. Not only is the storage efficiency low, but it is also prone to blockage.

[0009] 5. CO2 can cause rapid overall corrosion and severe local corrosion of the device in seawater. It is difficult to ensure the integrity of the device during deep-sea collection and storage. It is also difficult to accurately locate and alarm the location and size of CO2 leakage in the storage pipeline. Summary of the invention

[0010] The purpose of the present invention is to provide a seabed carbon storage equipment and method for deep-sea CO2 jet mining, taking into account the particularity of the seabed environment and the working principle of the mining equipment, to solve the technical difficulties of carbon storage after the jet. Based on the deep-sea CO2 jet mining process, the present invention provides equipment and related technologies for CO2 seabed saline layer storage to achieve CO2 storage. Compared with land storage, seabed carbon storage has the characteristics of large storage potential, far away from human settlements, far away from surface water bodies and groundwater layers on which humans depend for survival, higher safety, and less environmental risks, providing a solution for urban emission reduction.

[0011] To achieve the above object, the present invention adopts the following technical solutions:

[0012] A seabed carbon storage equipment for deep-sea CO2 jet mining, characterized in that it includes a mining ship platform intelligent monitoring system, a multi-pipeline suction device, an intelligent drive control mechanism, and a CO2 injection and storage device;

[0013] The mining ship platform intelligent monitoring system includes a flow meter, a pressure sensor and a control system. The flow meter and pressure sensor are installed at both ends of the pipeline. The control system is located on the mining ship. The dynamic volume flow balance leak detection method is used to calculate and detect the CO2 flow change at both ends of the pipeline to determine whether there is a leak and give the leakage amount. The pressure sensors at both ends of the pipeline are responsible for capturing the pressure change, positioning according to the propagation speed of the pressure wave and the time difference when the pressure sensor detects the pressure wave, so as to realize the monitoring of the entire CO2 collection and injection process. If there is a leak, an alarm will be issued in time, so as to achieve control at the first time.

[0014] The multi-pipeline suction device is connected to the mining vehicle, and includes a CO2 inlet device, a suction pump, a filtering device, and a CO2 storage tank. The CO2 inlet device includes a main CO2 inlet pipeline, and a plurality of secondary CO2 inlet pipelines with smaller diameters are arranged on the side wall to increase the rate of CO2 suction. Different CO2 inlet pipes can work individually or in coordination according to actual operating conditions, and a filter is arranged at the pipe mouth; the suction pump is connected to the CO2 inlet device and the filtering device to provide power for suction; the filtering device includes a filter plate, a rotating rod, a cleaning mechanism, a debris outlet, and a CO2 outlet to efficiently process CO2, and the CO2 storage tank temporarily stores the filtered CO2;

[0015] The CO2 injection and sealing device is connected to the multi-pipeline suction device through a hose with a certain telescopic length, and is connected to the intermediate cabin of the mining system, so as to fix the CO2 injection and sealing position without affecting the continuous driving of the mining vehicle. The device includes a CO2 transfer box, an emergency shut-off valve, a telescopic pipeline, a CO2 injection pipeline and a drill bit. The telescopic pipeline is retractable, and when the mining ship needs to move, the movement of the injection and sealing device can be controlled. An inclined multi-phase CO2 injection pipeline is arranged around the end of the telescopic pipeline, and the drill bit is provided with holes that can be injected synchronously, so as to improve the sealing speed and stability.

[0016] Considering that CO2 can cause rapid overall corrosion and severe local corrosion of the device in seawater medium and adapt to the high humidity and high pressure environment of the deep sea, the devices are all made of waterproof, pressure-proof and corrosion-resistant materials.

[0017] The CO2 inlet device comprises a plurality of CO2 inlet pipes, and a filter is installed at the end of the pipe opening to prevent sediments disturbed after the CO2 jet from entering the suction device and prevent blockage, thereby ensuring the CO2 storage effect; a control valve is provided on the CO2 inlet pipe to control the flow rate, and a suction pump assembly is provided to provide power for suction.

[0018] The filtering device includes a filter plate, a rotating rod, a cleaning mechanism, a debris outlet and a CO2 outlet. During the suction process, the filter plate filters the mixed sediment, and the filtered CO2 enters the CO2 storage box through the outlet, and the sediment is discharged from the debris outlet. At the same time, in order to avoid sediment or debris clogging the filter plate, the rotating rod is used to drive the cleaning mechanism to rotate for cleaning, thereby improving the filtering efficiency.

[0019] The CO2 storage tank is connected to the CO2 outlet of the filtering device so as to draw the filtered CO2 in multiple CO2 inlet pipes into the CO2 storage tank. The suction device also includes a suction pump and a driving mechanism. The suction pump is arranged between the CO2 inlet pipe and the CO2 storage tank. The driving mechanism is installed on the mining ship and is controlled by remote intelligent control.

[0020] The CO2 injection and storage device is connected to the middle cabin of the mining system. The lifting pump is located in the CO2 transfer box connected to the middle cabin, providing power for lifting the CO2 in the hose. The CO2 transfer box is connected to the telescopic pipeline, and a flow meter is used to monitor the outlet flow of the CO2 transfer box.

[0021] The telescopic pipeline is connected to the CO2 transfer box. When the upper telescopic tube reaches the maximum extension distance, the lower telescopic tube is triggered to extend and retract, and the telescopic tubes are nested and installed. Grooves are vertically arranged on the inner side of the telescopic tubes. Each groove is provided with a limit stopper and a slider matching the size of the groove. The slider is a self-lubricating non-metallic slider, which can effectively reduce the friction of sliding in the groove, thereby reducing power loss. At the same time, due to the retractability of the telescopic pipeline, when the mining ship needs to move, the movement of the injection sealing device is controlled.

[0022] Below the telescopic pipeline is a multiphase CO2 injection pipeline and an injection drill bit surrounding the pipeline. The surrounding arrangement of the CO2 injection pipeline can increase the CO2 storage rate. At the same time, since the multiphase CO2 injection pipeline is arranged at an angle around the end of the telescopic pipeline, the stability of the pipeline can be improved to prevent pipeline vibration from affecting the injection effect. The holes set in the drill bit can also realize the injection of CO2.

[0023] The working method corresponding to the seabed carbon sequestration equipment of deep-sea CO2 jet mining includes the following steps:

[0024] Step 1: The mining vehicle moves to the mining area, and liquid CO2 is sprayed through nozzles arranged obliquely downward to flush the polymetallic nodules on the seabed surface for collection. The suction devices and intelligent monitoring systems located on both sides of the mining vehicle and connected to the mining vehicle start working;

[0025] Step 2: The mining ship platform intelligent monitoring system analyzes and processes the data of the CO2 injection and sealing process in real time, calculates the flow rate and monitors the pressure in real time, determines whether there is a CO2 leak, gives an alarm message in time, and locates the leak;

[0026] Step 3: According to the CO2 flow rate requirement, open the corresponding suction pipeline and use a flow valve to control the flow rate, and perform the first filtration at the filter screen at the end of the CO2 inlet pipeline to filter out sediments and other debris to prevent pipeline blockage;

[0027] Step 4: After the CO2 outflow pipeline passes through the suction pump, secondary filtration begins. The CO2 enters the filter device and filters out possible sediments and other debris through the filter plate to prevent debris from entering the CO2 injection pipeline during storage and causing blockage. At the same time, the rotating rod rotates to drive the cleaning mechanism to clean the filter screen of the filter plate to prevent sediment or seabed soil from adhering to the filter screen. After filtration, the debris is discharged through the outlet and the CO2 enters the CO2 storage tank;

[0028] Step 5: CO2, under the action of the lifting pump, enters the CO2 transfer box connected to the middle cabin through the hose, thereby fixing the CO2 injection and sealing position, without affecting the continuous driving of the mining vehicle, and realizing collection and sealing at the same time, ensuring the smooth progress of mining work;

[0029] Step 6: The CO2 in the transfer box is injected downward through the injection pipeline. The injection pipeline is a retractable device that can be adjusted to a certain position according to the needs of the mining ship to facilitate the sealing work and the recovery at the end;

[0030] Step 7: The drilling work under the seabed is completed by the drill bit. The injection position is located in the seabed saline layer. There are holes at the bottom of the drill bit to facilitate CO2 injection and storage;

[0031] Step 8: The CO2 injection pipeline around the upper pipeline of the drill bit at the saline layer is injected simultaneously with the drill bit hole, and the jetted CO2 is injected into the saline layer. The pipeline is arranged obliquely around to improve the stability of the pipeline, and the injection work is completed;

[0032] Step 9: CO2 is injected into the saline water layer for storage. The water layer is covered with a thick mud protective layer, and it is difficult for carbon dioxide to seep out. Therefore, it has good sealing properties and good regional connectivity. After the CO2 is injected, it will not cause local high pressure;

[0033] Step 10: Repeat steps 1-9 for each stage of sealing.

[0034] Beneficial effects of the present invention:

[0035] 1. Based on the principle and process of deep-sea CO2 jet polymetallic nodule collection, the present invention provides a complete set of devices and methods for carbon capture, treatment, injection and storage after CO2 jet collection. The liquid CO2 after collection is stored in the deep sea to prevent the CO2 after the jet from affecting the marine environment, thus realizing the green mining of deep-sea mineral resources.

[0036] 2. At present, the storage technology after CO2 jetting in deep-sea polymetallic nodule collection operations focuses on water column storage, but the water column storage technology has major disadvantages, and the sediment storage technology is relatively blank. The present invention provides a CO2 marine sediment storage technology, which injects CO2 into the thick sediment layer of the seabed through a pipeline. The seabed sediment storage is highly safe and has a long storage time. In addition, the storage method involved in the present invention has little impact on the marine ecological environment.

[0037] 3. The present invention connects the CO2 injection device to the middle cabin of the mining system, ensuring the relative fixity of the drilling and injection position of the drill bit. The change of the suction position is adjusted by the hose connected to the injection device. This can ensure that the CO2 collected by the jet can be sucked anytime and anywhere, and the change of the drilling and injection position can be avoided to affect the continuous driving of the mining vehicle, avoid repeated disturbance of seabed sediments, and protect the marine ecological environment.

[0038] 4. The present invention is provided with a plurality of suction pipes containing filter screens and filtering devices, and the debris and CO2 are separated by the filtering device. A cleaning mechanism is provided to prevent debris or sediment from adhering to the surface of the filter screen, thereby improving the sealing efficiency and preventing the problem of mixed injection of CO2 and sediment during the seabed collection and injection process, thereby ensuring the smooth progress of the suction work.

[0039] 5. The present invention uses the method of intelligent control of mining ships to monitor the entire process of seabed carbon storage in real time. The monitoring system can accurately locate the leakage point, calculate the leakage amount, continuously monitor the CO2 injection situation, and control it immediately when a leakage occurs. At the same time, taking into full consideration the extremely strong corrosiveness of CO2 to metal materials after dissolving in water, all storage devices are made of pressure-proof and corrosion-resistant materials, which can ensure the smooth progress of injection and storage work, and give full play to the role of the seabed carbon "treasure house" on the basis of ensuring the efficient exploitation of deep-sea mineral resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0041] Figure 2 Schematic diagram of the filter.

[0042] Figure 3 Schematic diagram of the CO2 inlet pipeline from multiple angles.

[0043] Figure 4 Schematic diagram of the filtration device.

[0044] Figure 5 This is a schematic diagram of the telescopic pipeline of the injection device.

[0045] Figure 6 Schematic diagram of the CO2 injection pipeline.

[0046] Figure 7 Schematic diagram of the injection device drill bit.

[0047] In the figure, 1. main CO2 inlet pipeline; 2. secondary CO2 inlet pipeline; 3. filter screen; 4. control valve; 5. suction pump; 6. filtering device; 601. rotating rod; 602. debris outlet; 603. CO2 outlet; 604. filter plate; 605. cleaning mechanism; 7. CO2 storage tank; 8. hose; 9. intermediate cabin; 10. CO2 transfer tank; 11. lifting pump; 12. emergency stop valve; 13. telescopic pipeline; 1301. groove; 1302. block; 1303. slider; 14 CO2 injection pipeline; 15. drill bit; 1501. hole; 16. mining ship; 17. flow meter; 18. pressure sensor. DETAILED DESCRIPTION

[0048] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0049] The structures, proportions, sizes, etc. shown in the drawings in this specification are only used to match the

[0050] The contents shown are for people familiar with this technology to understand and read, and are not intended to limit the scope of the present invention.

[0051] conditions, so it has no technical significance. Any modification of the structure, change of proportion or size

[0052] Adjustments shall still fall within the scope of the present invention without affecting the effects and objectives that the present invention can produce.

[0053] The disclosed technical contents shall be within the scope of the disclosure.

[0054] The terms "left", "right", "middle" and "one" are used only for the convenience of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships should be considered within the scope of the present invention without substantially changing the technical content.

[0055] like Figure 1 As shown, a seabed carbon storage equipment for deep-sea CO2 jet mining includes an intelligent monitoring system for a mining vessel platform, a multi-pipeline suction device, an intelligent drive control mechanism, and a CO2 injection and storage device.

[0056] like Figure 1As shown, the mining ship platform intelligent monitoring system includes a flow meter 17, a pressure sensor 18 and a control system. The flow meter and pressure sensor are installed at both ends of the pipeline 13, and the control system is located on the mining ship 16. The dynamic volume flow balance leak detection method is used to calculate and detect the CO2 flow change at both ends of the pipeline 13 to determine whether there is a leak and give the leakage amount; the pressure sensors 18 at both ends of the pipeline 13 are responsible for capturing the pressure change, positioning according to the propagation speed of the pressure wave and the time difference when the pressure sensor 18 detects the pressure wave, so as to realize the monitoring of the entire CO2 collection and injection process. If there is a leak, an alarm is issued in time to achieve control at the first time.

[0057] like Figure 1 As shown, the multi-pipeline suction device is connected to the mining vehicle, including a CO2 inlet device, a suction pump 5, a filtering device and a CO2 storage box 7. The CO2 inlet device includes a main CO2 inlet pipeline 1, and a plurality of secondary CO2 inlet pipelines 2 with smaller diameters are arranged on the side wall to increase the rate of sucking CO2. Different CO2 inlet pipes can work individually or in coordination according to actual working conditions, and a filter 3 is arranged at the pipe mouth; the suction pump 5 is connected to the CO2 inlet device and the filtering device 6 to provide power for suction; the filtering device 6 has a filter plate 604, a rotating rod 601, a cleaning mechanism 605, a debris outlet 602 and a CO2 outlet 603, which can efficiently process CO2, and the CO2 storage box 7 temporarily stores the filtered CO2.

[0058] like Figure 1 As shown, the CO2 injection and sealing device is connected to the multi-pipeline suction device through a hose 8 with a certain telescopic length, and is connected to the intermediate cabin 9 of the mining system, so that the CO2 injection and sealing position is fixed without affecting the continuous driving of the mining vehicle. It includes a CO2 transfer box 10, an emergency valve 12, a telescopic pipeline 13, a CO2 injection pipeline 14 and a drill bit 15. The telescopic pipeline 13 is retractable, and when the mining ship 16 needs to move, the movement of the injection and sealing device can be controlled. An inclined multi-phase CO2 injection pipeline 14 is arranged around the end of the telescopic pipeline, and the drill bit 15 is provided with holes that can be injected synchronously to improve the sealing speed and stability.

[0059] like Figure 1 As shown, considering that CO2 can cause rapid overall corrosion and severe local corrosion of the device in seawater medium and to adapt to the high humidity and high pressure environment of the deep sea, the devices are all made of waterproof, pressure-proof and corrosion-resistant materials.

[0060] like Figure 2-3As shown, the CO2 inlet device includes multiple CO2 inlet pipes, and a filter 3 is installed at the end of the pipe mouth to prevent the sediment disturbed after the CO2 jet from entering the suction device and causing blockage, thereby affecting the CO2 storage effect; a control valve 4 is set on the CO2 inlet pipe to control the flow, and a suction pump 5 component is set to provide power for suction.

[0061] like Figure 4 As shown, the filtering device includes a filter plate 604, a rotating rod 601, a cleaning mechanism 605, a debris outlet 602 and a CO2 outlet 603. During the suction process, the filter plate filters the mixed sediment, and the filtered CO2 enters the CO2 storage tank 7 through the outlet, and the sediment is discharged from the debris outlet 602. At the same time, in order to prevent the sediment or debris from clogging the filter plate, the rotating rod 601 is used to drive the cleaning mechanism to rotate for cleaning, thereby improving the filtering efficiency.

[0062] like Figure 1 As shown, the CO2 storage tank 7 is connected to the CO2 outlet 603 of the filtering device to draw the filtered CO2 in multiple CO2 inlet pipes into the CO2 storage tank 7. The suction pump 5 is arranged between the CO2 inlet pipe and the CO2 storage tank 7. The driving mechanism is installed on the mining ship 16 and is controlled by remote intelligent control.

[0063] like Figure 1 As shown, the CO2 storage injection device is connected to the intermediate cabin 9 of the mining system. The lifting pump 11 is located in the CO2 transfer box 10 connected to the intermediate cabin 9, providing power for the lifting of CO2 in the hose 8. The CO2 transfer box 10 is connected to the telescopic pipe 13, and the flow meter 17 is used to monitor the outlet flow of the CO2 transfer box 10.

[0064] like Figure 5 As shown, the telescopic pipe 13 is connected to the CO2 transfer box 10. When the upper telescopic pipe reaches the maximum extension distance, the lower telescopic pipe is triggered to extend and retract, and the telescopic pipes are nested and installed. Grooves 1301 are vertically arranged on the inner side of the telescopic pipe 13. Each groove is provided with a stopper 1302 and a slider 1303 matching the size of the groove 1301. The slider 1303 is a self-lubricating non-metallic slider. This can effectively reduce the friction force of sliding in the groove, thereby reducing power loss. At the same time, due to the scalability of the telescopic pipe 13, when the mining ship 16 needs to move, the movement of the injection and sealing device can be controlled.

[0065] like Figure 6-7As shown, below the telescopic pipeline 13 are the multiphase CO2 injection pipeline 14 and the injection drill bit 15 surrounding the pipeline. The surrounding arrangement of the CO2 injection pipeline 14 can increase the CO2 storage rate. At the same time, since the multiphase CO2 injection pipeline 14 is arranged obliquely around the end of the telescopic pipeline 13, the stability of the pipeline can be improved to prevent the vibration of the pipeline from affecting the injection effect. The hole 1501 set in the drill bit 15 can also realize the injection of CO2.

[0066] Embodiment 1:

[0067] The mining vehicle moves to the mining area, and liquid CO2 is sprayed through nozzles arranged obliquely downward to flush the polymetallic nodules on the surface of the seabed for collection. The suction devices and intelligent monitoring systems located on both sides of the mining vehicle and connected to the mining vehicle start working.

[0068] The mining ship platform intelligent monitoring system analyzes and processes the data of the CO2 injection and storage process in real time, calculates the flow rate and monitors the pressure in real time, determines whether there is a CO2 leak, gives alarm information in time, and locates the leak.

[0069] According to the flow rate of CO2, the corresponding suction pipeline needs to be opened and the flow rate is controlled by a flow valve. The first filtration is performed on the filter at the end of the CO2 inlet pipeline to filter out sediments and other debris to prevent pipeline blockage.

[0070] After the CO2 outflow pipe passes through the suction pump, secondary filtration begins. The CO2 enters the filter device and filters out possible sediments and other debris through the filter plate to prevent debris from entering the CO2 injection pipe during storage and causing blockage. At the same time, the rotating rod rotates to drive the cleaning mechanism to clean the filter screen of the filter plate to prevent sediment or seabed soil from adhering to the filter screen. After filtration, the debris is discharged through the outlet and the CO2 enters the CO2 storage tank.

[0071] Under the action of the lifting pump, CO2 enters the CO2 transfer box connected to the middle cabin through a hose, thereby fixing the CO2 injection and sealing position without affecting the continuous driving of the mining vehicle, achieving simultaneous collection and sealing to ensure smooth mining work.

[0072] The CO2 in the transfer box is injected downward through the injection pipeline. The injection pipeline is a retractable device that can be adjusted to a certain position according to the movement or needs of the mining ship, and facilitate the sealing work and the recovery at the end.

[0073] The drilling work under the seabed is completed by the drill bit. The injection position is located in the seabed saline layer. There are holes at the bottom of the drill bit to facilitate CO2 injection and storage. At the saline layer, the CO2 injection pipeline around the upper pipeline of the drill bit and the drill bit hole are injected at the same time, and the jetted CO2 is injected into the saline layer. The pipeline is arranged at an angle around to improve the stability of the pipeline, and the injection work is completed. CO2 is injected into the saline layer for storage. The water layer is covered with a thick mud protective layer, and it is difficult for carbon dioxide to seep out. Therefore, it has good sealing properties and good regional connectivity. The injection of CO2 will not cause local high pressure.

[0074] Steps 1-9 can be repeated for each stage of sealing.

Claims

1. A seabed carbon storage equipment for deep-sea CO2 jet mining, characterized in that: It includes the mining ship platform intelligent monitoring system, multi-pipeline suction device, intelligent drive control mechanism, and CO2 injection and storage device; The mining ship platform intelligent monitoring system includes a flow meter, a pressure sensor and a control system. The flow meter and pressure sensor are installed at both ends of the pipeline. The control system is located on the mining ship. The dynamic volume flow balance leak detection method is used to calculate and detect the CO2 flow change at both ends of the pipeline to determine whether there is a leak and give the leakage amount. The pressure sensors at both ends of the pipeline are responsible for capturing the pressure change, positioning according to the propagation speed of the pressure wave and the time difference when the pressure sensor detects the pressure wave, so as to realize the monitoring of the entire CO2 collection and injection process. If there is a leak, an alarm will be issued in time, so as to achieve control at the first time. The multi-pipeline suction device is connected to the mining vehicle, and includes a CO2 inlet device, a suction pump, a filtering device, and a CO2 storage tank. The CO2 inlet device includes a main CO2 inlet pipeline, and a plurality of secondary CO2 inlet pipelines with smaller diameters are arranged on the side wall to increase the rate of CO2 suction. Different CO2 inlet pipes can work individually or in coordination according to actual operating conditions, and a filter is arranged at the pipe mouth; the suction pump is connected to the CO2 inlet device and the filtering device to provide power for suction; the filtering device includes a filter plate, a rotating rod, a cleaning mechanism, a debris outlet, and a CO2 outlet to efficiently process CO2, and the CO2 storage tank temporarily stores the filtered CO2; The CO2 injection and sealing device is connected to the multi-pipeline suction device through a hose with a certain telescopic length, and is connected to the intermediate cabin of the mining system, so as to fix the CO2 injection and sealing position without affecting the continuous driving of the mining vehicle. The device includes a CO2 transfer box, an emergency shut-off valve, a telescopic pipeline, a CO2 injection pipeline and a drill bit. The telescopic pipeline is retractable, and when the mining ship needs to move, the movement of the injection and sealing device can be controlled. An inclined multi-phase CO2 injection pipeline is arranged around the end of the telescopic pipeline, and the drill bit is provided with holes that can be injected synchronously, so as to improve the sealing speed and stability.

2. The deep sea CO2 jet mining seabed carbon storage equipment according to claim 1, characterized in that: CO2 can cause rapid overall corrosion and severe local corrosion of the device in seawater medium, and in order to adapt to the high humidity and high pressure environment of the deep sea, the devices are all made of waterproof, pressure-proof and corrosion-resistant materials.

3. The seabed carbon sequestration equipment for deep sea CO2 jet mining as claimed in claim 1, characterized in that: The CO2 inlet device comprises a plurality of CO2 inlet pipes, and a filter is installed at the end of the pipe opening to prevent sediments disturbed after the CO2 jet from entering the suction device and prevent blockage, thereby ensuring the CO2 storage effect; a control valve is provided on the CO2 inlet pipe to control the flow rate, and a suction pump assembly is provided to provide power for suction.

4. The seabed carbon sequestration equipment for deep sea CO2 jet mining as claimed in claim 1, characterized in that: The filtering device includes a filter plate, a rotating rod, a cleaning mechanism, a debris outlet and a CO2 outlet. During the suction process, the filter plate filters the mixed sediment, and the filtered CO2 enters the CO2 storage box through the outlet, and the sediment is discharged from the debris outlet. At the same time, in order to avoid sediment or debris clogging the filter plate, the rotating rod is used to drive the cleaning mechanism to rotate for cleaning, thereby improving the filtering efficiency.

5. The seabed carbon sequestration equipment for deep sea CO2 jet mining as claimed in claim 1, characterized in that: The CO2 storage tank is connected to the CO2 outlet of the filtering device so as to draw the filtered CO2 in multiple CO2 inlet pipes into the CO2 storage tank. The suction device also includes a suction pump and a driving mechanism. The suction pump is arranged between the CO2 inlet pipe and the CO2 storage tank. The driving mechanism is installed on the mining ship and is controlled by remote intelligent control.

6. The seabed carbon sequestration equipment for deep sea CO2 jet mining as claimed in claim 1, characterized in that: The CO2 injection and storage device is connected to the middle cabin of the mining system. The lifting pump is located in the CO2 transfer box connected to the middle cabin, providing power for lifting the CO2 in the hose. The CO2 transfer box is connected to the telescopic pipeline, and a flow meter is used to monitor the outlet flow of the CO2 transfer box.

7. The seabed carbon sequestration equipment for deep sea CO2 jet mining as claimed in claim 1, characterized in that: The telescopic pipeline is connected to the CO2 transfer box. When the upper telescopic tube reaches the maximum extension distance, the lower telescopic tube is triggered to extend and retract, and the telescopic tubes are nested and installed. Grooves are vertically arranged on the inner side of the telescopic tubes. Each groove is provided with a limit stopper and a slider matching the size of the groove. The slider is a self-lubricating non-metallic slider, which can effectively reduce the friction of sliding in the groove, thereby reducing power loss. At the same time, due to the retractability of the telescopic pipeline, when the mining ship needs to move, the movement of the injection sealing device is controlled.

8. The seabed carbon sequestration equipment for deep sea CO2 jet mining as claimed in claim 1, characterized in that: Below the telescopic pipeline is a multiphase CO2 injection pipeline and an injection drill bit surrounding the pipeline. The surrounding arrangement of the CO2 injection pipeline can increase the CO2 storage rate. At the same time, since the multiphase CO2 injection pipeline is arranged at an angle around the end of the telescopic pipeline, the stability of the pipeline can be improved to prevent pipeline vibration from affecting the injection effect. The holes set in the drill bit can also realize the injection of CO2.

9. The working method corresponding to the seabed carbon sequestration equipment for deep-sea CO2 jet mining as claimed in claim 1 comprises the following steps: Step 1: The mining vehicle moves to the mining area, and liquid CO2 is sprayed through nozzles arranged obliquely downward to flush the polymetallic nodules on the seabed surface for collection. The suction devices and intelligent monitoring systems located on both sides of the mining vehicle and connected to the mining vehicle start working; Step 2: The mining ship platform intelligent monitoring system analyzes and processes the data of the CO2 injection and sealing process in real time, calculates the flow rate and monitors the pressure in real time, determines whether there is a CO2 leak, gives an alarm message in time, and locates the leak; Step 3: According to the CO2 flow rate requirement, open the corresponding suction pipeline and use a flow valve to control the flow rate, and perform the first filtration at the filter screen at the end of the CO2 inlet pipeline to filter out sediments and other debris to prevent pipeline blockage; Step 4: After the CO2 outflow pipeline passes through the suction pump, secondary filtration begins. The CO2 enters the filter device and filters out possible sediments and other debris through the filter plate to prevent debris from entering the CO2 injection pipeline during storage and causing blockage. At the same time, the rotating rod rotates to drive the cleaning mechanism to clean the filter screen of the filter plate to prevent sediment or seabed soil from adhering to the filter screen. After filtration, the debris is discharged through the outlet and the CO2 enters the CO2 storage tank; Step 5: CO2, under the action of the lifting pump, enters the CO2 transfer box connected to the middle cabin through the hose, thereby fixing the CO2 injection and sealing position, without affecting the continuous driving of the mining vehicle, and realizing collection and sealing at the same time, ensuring the smooth progress of mining work; Step 6: The CO2 in the transfer box is injected downward through the injection pipeline. The injection pipeline is a retractable device that can be adjusted to a certain position according to the needs of the mining ship to facilitate the sealing work and the recovery at the end; Step 7: The drilling work under the seabed is completed by the drill bit. The injection position is located in the seabed saline layer. There are holes at the bottom of the drill bit to facilitate CO2 injection and storage; Step 8: The CO2 injection pipeline around the upper pipeline of the drill bit at the saline layer is injected simultaneously with the drill bit hole, and the jetted CO2 is injected into the saline layer. The pipeline is arranged obliquely around to improve the stability of the pipeline, and the injection work is completed; Step 9: CO2 is injected into the saline water layer for storage. The water layer is covered with a thick mud protective layer, and it is difficult for carbon dioxide to seep out. Therefore, it has good sealing properties and good regional connectivity. After the CO2 is injected, it will not cause local high pressure; Step 10: Repeat steps 1-9 for each stage of sealing.

Images