CN111577288A - Deep-sea multi-metal nodule near-bottom drag mining system and method - Google Patents
Deep-sea multi-metal nodule near-bottom drag mining system and method Download PDFInfo
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- CN111577288A CN111577288A CN202010637866.9A CN202010637866A CN111577288A CN 111577288 A CN111577288 A CN 111577288A CN 202010637866 A CN202010637866 A CN 202010637866A CN 111577288 A CN111577288 A CN 111577288A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C50/00—Obtaining minerals from underwater, not otherwise provided for
- E21C50/02—Obtaining minerals from underwater, not otherwise provided for dependent on the ship movements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
- B63B27/25—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines for fluidised bulk material
Abstract
The invention discloses a deep-sea multi-metal nodule near-bottom drag mining system and a method, wherein the system comprises a water surface support ship, an underwater near-bottom mining platform and a seabed acquisition system; a tower crane on a water surface support ship is hoisted with a main ore raising pipeline, the lower end of the main ore raising pipeline is connected with an underwater near-bottom mining platform, the underwater near-bottom mining platform is connected with a seabed acquisition system through a dragging pipeline, the seabed acquisition system comprises a plurality of groups of hydraulic acquisition units which are hinged with each other, and a wide acquisition head is formed by the plurality of groups of hydraulic acquisition units; the method comprises the following steps: and (3) sending high-pressure water into the seabed acquisition system by the underwater near-bottom mining platform, carrying out high-pressure water jet type ore acquisition, sucking back the ore by the underwater near-bottom mining platform, and sending the ore into the main ore lifting pipeline, so that the ore is lifted to a water surface support ship on the sea surface. On the basis of solving the problem of insufficient power of the acquisition system and the micro-terrain adaptability, the invention can greatly improve the width of the acquisition head and improve the mining efficiency.
Description
Technical Field
The invention relates to a system and a method, in particular to a deep-sea polymetallic nodule near-bottom drag mining system and a method, belonging to the field of deep-sea polymetallic nodule mining technology and equipment.
Background
Deep sea contains abundant mineral resources, and particularly contains some rare metal resources on the land. With the gradual depletion of land resources and the rapid development of ocean technologies, more and more countries turn the direction of resource development to the deep sea, especially in recent years, part of countries accelerate the development progress of deep sea polymetallic nodule resource commercial development technologies, and make the goal of commercial development in 2035 years, so that the exploitation of deep sea polymetallic nodules is widely concerned.
The core problem of the deep sea polymetallic nodule resource exploitation system is how to collect and lift ores existing on the bottom thin and soft sediments to the sea surface with highest efficiency. The existing deep sea multi-metal nodule mining scheme is basically characterized in that a mining supporting mother ship is arranged on the sea surface, a crawler-type or sled self-propelled mining machine is arranged on the mining supporting mother ship to the sea bottom, the mining machine and the sea surface supporting mother ship are connected through a lifting system consisting of a pump and a pipeline, and collected minerals are conveyed to the sea surface mother ship through the lifting system. However, the solution has disadvantages for exploitation of deep sea polymetallic nodules, which are mainly reflected in:
(1) the shear strength of the thin and soft sediment is low, the traction force of the self-propelled mining vehicle is limited, the self-propelled mining vehicle is not favorable for walking due to insufficient power, particularly, the terrain with larger gradient is not favorable for the self-propelled mining vehicle to work, so that the stoping area is greatly limited;
(2) the polymetallic nodules belong to surface mine types, the abundance is low, only 10-20 kilograms per square meter is needed, the single mining width of the existing self-propelled mining vehicle is limited due to the power problem, the mining capacity and the scale are difficult to be greatly improved, and therefore the mining efficiency is low;
(3) the existing collecting head adopts a linear arrangement layout form, has insufficient adaptability to the change of micro-topography in the mining width, and can reduce the recovery rate.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a deep-sea polymetallic nodule near-bottom drag mining system and a deep-sea polymetallic nodule near-bottom drag mining method.
In order to solve the technical problems, the invention adopts the technical scheme that: a deep sea polymetallic nodule near-bottom drag mining system comprises a water surface support ship, an underwater near-bottom mining platform and a seabed acquisition system; the system comprises a water surface supporting ship, a tower crane, a submarine acquisition system and a water surface supporting ship, wherein the position of a moon pool of the water surface supporting ship is provided with the tower crane, the tower crane is hoisted with a main ore raising pipeline, the lower end of the main ore raising pipeline is connected with an underwater near-bottom mining platform, the underwater near-bottom mining platform is connected with the submarine acquisition system through a dragging pipeline, the submarine acquisition system comprises a plurality of groups of hydraulic acquisition units which are hinged with each other, and a wide acquisition head is formed;
high-pressure water is sent to a hydraulic collection unit of a seabed collection system by an underwater near-bottom mining platform to collect ores in a high-pressure water jet mode, the ores are sucked back by the underwater near-bottom mining platform, and then the ores are sent to a main ore lifting pipeline by the underwater near-bottom mining platform, so that the ores are lifted to a water surface support ship on the sea surface.
Furthermore, the underwater near-bottom mining platform comprises a mining platform body, a power system, a high-pressure water system, a pumping system, a storage and feeding system, a communication positioning system and a monitoring system;
the mining platform body is provided with an upper connector and a lower connector, the upper connector is used for connecting a main lifting pipeline, and the lower connector is used for connecting a seabed collection system; the power system is arranged on the mining platform body and drives the underwater near-bottom mining platform to advance and rotate; the high-pressure water system is communicated with the seabed acquisition system through a high-pressure water pipe and supplies high-pressure water to the seabed acquisition system; the pumping system is communicated with the seabed acquisition system through a conveying pipeline and pumps ores from the seabed acquisition system; the storage feeding system comprises a storage tank and a feeder positioned below the storage tank and communicated with the storage tank, the storage tank is communicated with the pumping system and receives ore delivered by the pumping system, and the feeder is connected with the main ore-raising pipeline and delivers the ore into the main ore-raising pipeline; the communication positioning system is an underwater platform communication and over-baseline positioning system and is used for determining the relative positions and postures of a water surface support ship, an underwater near-bottom mining platform and a seabed acquisition system; the monitoring system monitors the seafloor microtopography and the ore endowing conditions.
Furthermore, the seabed acquisition system also comprises a high-pressure water pipe, a conveying pipeline, an acquisition body frame and acquisition system monitoring equipment, wherein the hydraulic acquisition unit and the acquisition system monitoring equipment are arranged on the acquisition body frame;
the high-pressure water pipe and the conveying pipeline are covered with a main interface at the top end position together, and the main interface is connected with a lower connector of the mining platform body; the conveying pipeline is communicated with a plurality of branch conveying pipelines, the branch conveying pipelines extend into the hydraulic collecting unit and form an ore suction inlet, the high-pressure water pipe is communicated with a plurality of branch high-pressure water pipes, the bottom ends of the branch high-pressure water pipes extend into the hydraulic collecting unit and are divided into two branches, one branch is communicated with a front jet flow spray nozzle, the other branch is communicated with a rear jet flow spray nozzle, and the front jet flow spray nozzle and the rear jet flow spray nozzle are respectively positioned on the front side and the rear side of the ore suction inlet.
Further, the height h of the underwater near-bottom mining platform from the seabed is between 20 and 50 m.
A mining method of a deep sea multi-metal nodule near-bottom drag mining system specifically comprises the following steps:
the high-pressure water system sends high-pressure water to the front jet flow nozzle and the rear jet flow nozzle through the high-pressure water pipe and sprays running water, the hydraulic collection unit breaks the ground by using jet flow, ores are stripped and suspended from seabed sediments, the COANDA effect is utilized again, the suspended ores are sent to an ore suction inlet, at the moment, the ores are sucked into the conveying pipeline under the action of the pumping system and then sent into the storage tank of the storage feeding system, the ores are sent to the main ore raising pipeline through the feeding machine of the storage feeding system, and the ores are lifted to the water surface supporting ship on the sea surface by the main ore raising pipeline, so that the whole mining process is completed.
The invention discloses a deep-sea polymetallic nodule near-bottom dragging mining system and a method, wherein an underwater near-bottom self-pushing type mining platform drags a seabed acquisition system, so that the problem that the walking power of the seabed acquisition system on soft sediments is insufficient is avoided, and the underwater near-bottom mining platform can be automatically pushed, so that the upper end and the lower end of a main ore-raising pipeline keep synchronous motion, the bending stress of the main ore-raising pipeline is reduced, and the mechanical property of the whole mining system is improved. The hydraulic type acquisition units in flexible connection can better adapt to the change of submarine micro-topography, the recovery rate is improved, the width of the acquisition head can be greatly improved on the basis of solving the problem of insufficient power of an acquisition system and the adaptability of the micro-topography, and the mining efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the overall system of the present invention.
Fig. 2 is a schematic view of the components of the underwater near-bottom mining platform of fig. 1.
FIG. 3 is a side view of the subsea acquisition system of FIG. 1.
Fig. 4 is a rear view of the seafloor collection system of fig. 3.
In the figure: 1. a surface support vessel; 2. an underwater near-bottom mining platform; 3. a seafloor collection system; 4. a main winnowing pipeline; 5. a mining platform body; 6. a power system; 7. a high pressure water system; 8. a pumping system; 9. a material storage and feeding system; 10. a communication positioning system; 11. a monitoring system; 12. an upper connector; 13. a lower connector; 14. tower crane; 15. a water conservancy type acquisition unit; 16. a high pressure water pipe; 17. a delivery conduit; 18. collecting system monitoring equipment; 19. collecting a body frame; 20. an interface; 21. an ore suction inlet; 22. a front jet nozzle; 23. and a rear jet nozzle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A deep sea polymetallic nodule near-bottom drag mining system comprises a water surface supporting ship 1, an underwater near-bottom mining platform 2 and a seabed acquisition system 3, as shown in figure 1;
the water surface supporting ship 1 and the main ore-raising pipeline 4 adopt the existing oil extraction platform and oil pipeline technology, the water surface supporting ship 1 is used as a sea surface mining ship, a tower crane 14 is arranged at the position of a moon pool in the middle of a ship body, the main ore-raising pipeline 4 is hoisted by the tower crane 14, and ores are lifted to the water surface supporting ship 1 by the main ore-raising pipeline 4;
the lower end of the main ore raising pipeline 4 is connected with the underwater near-bottom mining platform 2, the underwater near-bottom mining platform 2 sucks the ore collected by the seabed collection system 3, and the ore is sent into the main ore raising pipeline 4; meanwhile, the underwater near-bottom mining platform 2 is connected with the seabed acquisition system 3 through a dragging pipeline, and the underwater near-bottom mining platform 2 drags the seabed acquisition system 3 to move in the mining process;
the seabed collection system 3 comprises a plurality of groups of hydraulic collection units 15 which are hinged to each other, and due to the fact that the hydraulic collection units are connected in a hinged mode, adjacent hydraulic collection units can be relatively displaced or rotate in the up-down direction, the underwater seabed collection system can better adapt to the change of small seabed terrain, when the underwater near-bottom mining platform 2 is dragged, the hydraulic collection units are close to the bottom to work, the phenomenon that the pit is enlarged to be away from the ground to cause ore capture difficulty is avoided, and the phenomenon that the collection head is protruded to point out to be inserted into sediment to cause that ore collection cannot be carried. And moreover, the plurality of groups of hydraulic collecting units form a wide collecting head, so that the mining efficiency is greatly improved.
The deep-sea polymetallic nodule near-bottom towing mining system is formed by the flashing coordination work of the water surface support ship 1, the underwater near-bottom mining platform 2 and the seabed acquisition system 3, and the problem of insufficient power of a traveling mechanism of rare and soft sediments is solved. Meanwhile, the problem that the acquisition system cannot adapt to terrain change is solved, the width of acquiring ores at a time is increased through the wide acquisition head, and the mining capacity is improved.
Further, as shown in fig. 2, the underwater near-bottom mining platform 2 includes a mining platform body 5, a power system 6, a high-pressure water system 7, a pumping system 8, a storage and feeding system 9, a communication and positioning system 10, and a monitoring system 11;
the mining platform body 5 is a main body of the device, and the high-pressure water system 7, the pumping system 8, the storage and feeding system 9 and the like are all arranged on the mining platform body 5; an upper connector 12 is arranged at the top end of the mining platform body 5, the upper connector 12 is used for being connected with the lower end of the main ore lifting pipeline 4, and the upper connector 12 and the lower end of the main ore lifting pipeline 4 are connected in a hinged mode, so that the main ore lifting pipeline 4 can bear vertical tension and cannot generate torque to cause unnecessary loss to the main ore lifting pipeline 4 in the process that the water surface supporting ship 1 and the underwater near-bottom mining platform 2 synchronously move; in addition, in order to further reduce the tensile force borne by the main ore-raising pipeline 4, the mining platform body 5 is made of a buoyancy material, so that the underwater weight of the underwater near-bottom mining platform 2 is effectively reduced as much as possible; meanwhile, the lower end of the mining platform body 5 is also provided with a lower connector 13, and the lower connector 13 is used for connecting the seabed collection system 3.
The power system 6 is arranged on the mining platform body 5 and drives the underwater near-bottom mining platform 2 to advance and rotate, and the power system 6 comprises two main propulsion propellers and two side propulsion propellers (one on each of a port side and a starboard side) besides a power mechanism (such as a motor); the main propulsion propeller is positioned right behind, so that the underwater near-bottom mining platform 2 can move forwards underwater, the self-propulsion of the underwater near-bottom mining platform 2 is realized, the ship 1 can be supported to synchronously move forwards along with the water surface, the upper end and the lower end of the main ore lifting pipeline 4 keep synchronous motion, and the bending stress of the main ore lifting pipeline 4 is reduced; the side propulsion propellers are positioned on both sides and can help the underwater near-bottom mining platform 2 to rotate left and right.
The high-pressure water system 7 is communicated with the seabed acquisition system 3 through a high-pressure water pipe 16, seawater is pumped by the high-pressure water system 7, and high-pressure water is supplied to the seabed acquisition system 3; the pumping system 8 is communicated with the seabed acquisition system 3 through a conveying pipeline 17, and the pumping system 8 pumps ores from the seabed acquisition system 3 and sends the ores to the material storing and feeding system 9; the storage feeding system 9 comprises a storage tank and a feeder positioned below the storage tank and communicated with the storage tank, the storage tank is communicated with the pumping system 6 and receives ore sent by the pumping system 8, and the feeder is connected with the main ore raising pipeline 4 and sends the ore to the main ore raising pipeline 4;
the communication positioning system 10 is an underwater platform communication and ultra-baseline positioning system, the communication positioning system 10 is a system commonly used in the deep sea polymetallic nodule resource exploitation process, and can accurately determine the relative positions and postures of the water surface support ship 1, the underwater near-bottom mining platform 2 and the seabed acquisition system 3; the monitoring system 11 monitors the seafloor microtopography and the ore endowing conditions so as to analyze and evaluate the working state of the whole mining system, the deformation condition of the main winnowing pipeline 4 and the like. The monitoring system 11 is also a commonly used system in the process of mining deep sea polymetallic nodule resources, conditions for monitoring the seabed microtopography and ore endowing are monitored, images of the seabed microtopography and the landform are obtained by using sonar, the characteristics of the seabed microtopography and the landform are inverted based on an image analysis technology, and the particle size distribution and abundance change of the ore can be produced by a three-dimensional landform image.
In addition, the height h of the underwater near-bottom mining platform 2 from the sea bottom is generally between 20 and 50m, the specific set height is determined according to the submarine topography condition of a mining area, and the off-bottom height generally exceeds the highest mountain peak of the sea bottom, so that the underwater near-bottom mining platform is prevented from being blocked by a mountain body when mining moves; and, the profile of the mining platform body 5 of the underwater near-bottom mining platform 2 is similar to a submarine, so as to reduce resistance during movement.
For the underwater near-bottom mining platform 2 and the seabed acquisition system 3, the underwater near-bottom mining platform and the seabed acquisition system are connected through a dragging pipeline and are also communicated with each other through a high-pressure water pipe 16 and a conveying pipeline 17, and high-pressure water is sent to a hydraulic acquisition unit 15 of the seabed acquisition system 3 through the high-pressure water pipe 16 by a high-pressure water system 7 in the underwater near-bottom mining platform 2 to perform high-pressure water jet type ore acquisition; the ore is sucked back by a pumping system 8 of the underwater near-bottom mining platform 2 and is transported by a conveying pipeline 17, then the ore is sent to a storage feeding system 9 by the pumping system 8, the ore is sent to a main ore-raising pipeline 4 by a feeder of the storage feeding system 9, and the ore is lifted to a water surface supporting ship 1 on the sea surface, so that the ore-raising process is completed;
wherein, the high pressure water pipe 16 and the delivery pipeline 17 both belong to the seabed acquisition system 3, the seabed acquisition system 3 further comprises an acquisition body frame 19 and an acquisition system monitoring device 18, as shown in fig. 3, the hydraulic acquisition unit 15 and the acquisition system monitoring device 18 are both installed on the acquisition body frame 19;
the acquisition system monitoring equipment 18 is a device commonly used in the deep sea polymetallic nodule resource exploitation process, and usually adopts image acquisition equipment such as a camera and the like to constantly monitor the seabed condition; the hydraulic collecting units 15 are hydraulic collecting heads, the hydraulic collecting units are arranged in groups, for example, 5 collecting units are taken as a group, 4-6 groups can be assembled together, and the width of each hydraulic collecting unit is 1-2 meters, so that the collecting heads with the width of 20-30 meters are formed, and the collecting efficiency is greatly improved by the aid of the collecting heads; and adjacent acquisition units are hinged directly and indirectly, so that relative displacement can be generated or rotation can be realized in the up-down direction, and the change of the submarine micro-topography can be better adapted.
Meanwhile, the high-pressure water pipe 16 and the conveying pipeline 17 are matched with a plurality of groups of hydraulic collecting units 15, the conveying pipeline 17 is communicated with a plurality of branch conveying pipelines, the high-pressure water pipe 16 is also communicated with a plurality of branch high-pressure water pipes, and the high-pressure water line and the conveying line are in one-to-one correspondence through the branch pipelines; the branch conveying pipeline extends into the hydraulic acquisition unit 15 and forms an ore suction inlet 21, the bottom end of the branch high-pressure water pipe extends into the hydraulic acquisition unit 15 and is divided into two branches, one branch is communicated with a front jet flow spray nozzle 22, the other branch is communicated with a rear jet flow spray nozzle 22, and the front jet flow spray nozzle 22 and the rear jet flow spray nozzle 22 are respectively positioned on the front side and the rear side of the ore suction inlet 21; therefore, the front row of nozzles and the rear row of nozzles are used for jetting and breaking the soil, the ores are stripped from the sediments and suspended, the COANDA effect (COANDA effect) is formed by the bent plates, the ores in the sediments are sent to the ore suction port 21, and the ores are sucked. This bottoming operation is similar to a deliming operation, but the ore can be stripped from the deposit and continuously collected for transport to a near-bottom mining platform.
In addition, the high-pressure water pipe 16 and the conveying pipeline 17 are covered with a main interface 20 at the top end position, and the main interface 20 is connected with the lower connector 13 of the mining platform body 5, so that the high-pressure water pipe 16 and the conveying pipeline 17 can be conveniently communicated with the underwater near-bottom mining platform 2.
The invention also discloses a mining method of the deep-sea multi-metal nodule near-bottom drag mining system, which comprises the following specific steps:
the high-pressure water system 7 sends high-pressure water to the front jet nozzle 22 and the rear jet nozzle 22 through the high-pressure water pipe 16 and sprays running water, the hydraulic collection unit 15 breaks the ground through jet flow to peel off and suspend ores from submarine sediments, then sends the suspended ores into the ore suction inlet 21 through the COANDA effect, at the moment, the ores are sucked into the conveying pipeline 17 under the action of the pumping system 8 and then sent into the storage tank of the storage feeding system 9, then the ores are sent to the main ore lifting pipeline 4 through the feeding machine of the storage feeding system 9, and the ores are lifted to the water surface supporting ship 1 on the sea surface through the main ore lifting pipeline 4, so that the whole mining process is completed.
Compared with the prior art, the deep-sea polymetallic nodule near-bottom drag mining system and the method disclosed by the invention have the following beneficial effects:
(1) the submarine acquisition system is dragged by the underwater near-bottom self-propelled mining platform, so that the problem that the shear strength of the thin and soft sediments is low and sufficient traction force cannot be provided for a crawler-type mining vehicle or other walking chassis is solved;
(2) the underwater near-bottom mining platform can be automatically propelled by a propeller, so that the upper end and the lower end of the main ore-raising pipeline keep synchronous motion, the risk of overload of bending stress caused by overlarge position deviation of the bottom end of the main ore-raising pipeline is reduced, the bending stress of the main ore-raising pipeline is reduced, and the mechanical property of the whole mining system is improved;
(3) the multiple groups of acquisition units are flexibly connected in parallel, so that the system is better suitable for the change of the submarine micro-topography, the recovery rate is improved, and the problem that the traditional acquisition system cannot adapt to the change of the topography is solved;
(4) on the basis of solving the problem of insufficient power of the acquisition system and improving the adaptability of the micro-terrain, the width of the acquisition head is greatly improved, and the mining efficiency is improved.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (5)
1. A deep sea polymetallic nodule near-bottom drag mining system comprising a surface support vessel (1), characterized in that: the underwater near-bottom mining platform further comprises an underwater near-bottom mining platform (2) and a seabed acquisition system (3); a tower crane (14) is arranged at the position of a moon pool of the water surface supporting ship (1), a main ore raising pipeline (4) is hoisted by the tower crane (14), the lower end of the main ore raising pipeline (4) is connected with an underwater near-bottom mining platform (2), the underwater near-bottom mining platform (2) is connected with a seabed acquisition system (3) through a dragging pipeline, the seabed acquisition system (3) comprises a plurality of groups of hydraulic acquisition units (15) which are hinged with each other, and the plurality of groups of hydraulic acquisition units form a wide acquisition head;
high-pressure water is sent to a hydraulic acquisition unit (15) of a seabed acquisition system (3) by an underwater near-bottom mining lower platform (2) to perform high-pressure water jet type ore acquisition, the underwater near-bottom mining lower platform (2) sucks back the ore, and the underwater near-bottom mining lower platform (2) sends the ore to a main ore raising pipeline (4) so that the ore is lifted to a water surface supporting ship (1) on the sea surface.
2. The deep-sea polymetallic nodule near-bottom drag mining system of claim 1, wherein: the underwater near-bottom mining lower platform (2) comprises a mining platform body (5), a power system (6), a high-pressure water system (7), a pumping system (8), a storage and feeding system (9), a communication and positioning system (10) and a monitoring system (11);
an upper connector (12) and a lower connector (13) are arranged on the mining platform body (5), the upper connector (13) is used for connecting a main lifting pipeline (4), and the lower connector (13) is used for connecting a seabed collection system (3); the power system (6) is arranged on the mining platform body (5) and drives the underwater near-bottom mining platform (2) to advance and rotate; the high-pressure water system (7) is communicated with the seabed acquisition system (3) through a high-pressure water pipe (16) and supplies high-pressure water to the seabed acquisition system (3); the pumping system (8) is communicated with the seabed acquisition system (3) through a conveying pipeline (17) and used for pumping ore from the seabed acquisition system (3); the storage and feeding system (9) comprises a storage tank and a feeder positioned below the storage tank and communicated with the storage tank, the storage tank is communicated with the pumping system (6) and receives ore sent by the pumping system (8), and the feeder is connected with the main ore raising pipeline (4) and sends the ore into the main ore raising pipeline (4); the communication positioning system (10) is an underwater platform communication and over-baseline positioning system and is used for determining the relative positions and postures of the water surface support ship (1), the underwater near-bottom mining platform (2) and the seabed acquisition system (3); the monitoring system (11) monitors seafloor microtopography and ore imparting conditions.
3. The deep-sea polymetallic nodule near-bottom drag mining system of claim 2, wherein: the seabed acquisition system (3) further comprises a high-pressure water pipe (16), a conveying pipeline (17), an acquisition body frame (19) and acquisition system monitoring equipment (18), wherein the hydraulic acquisition unit (15) and the acquisition system monitoring equipment (18) are both arranged on the acquisition body frame (19);
the high-pressure water pipe (16) and the conveying pipeline (17) are covered with a main connector (20) at the top end, and the main connector (20) is connected with a lower connector (13) of the mining lower platform body (5); conveying pipeline (17) intercommunication has many branch conveying pipeline, and branch conveying pipeline extends to in the hydraulic formula collection unit (15) and forms ore sunction inlet (21), high pressure water pipe (16) intercommunication has many branch high pressure water pipes, and branch high pressure water pipe's bottom extends to in the hydraulic formula collection unit (15) and divides into two branches, and a branch intercommunication has preceding jet spray nozzle (22), and another branch intercommunication has back jet spray nozzle (23), and preceding jet spray nozzle (22), back jet spray nozzle (23) are located the front and back both sides of ore sunction inlet (21) respectively.
4. The deep-sea polymetallic nodule near-bottom drag mining system of claim 3, wherein: the height h of the underwater near-bottom mining platform (2) from the seabed is between 20 and 50 m.
5. A mining method of a deep sea polymetallic nodule near bottom drag mining system as claimed in any one of claims 1 to 4 wherein: the mining method specifically comprises the following steps:
the high-pressure water system (7) sends high-pressure water to the front jet flow nozzle (22) and the rear jet flow nozzle (23) through the high-pressure water pipe (16) and sprays flowing water, the hydraulic collection unit (15) breaks the ground through jet flow, ores are stripped and suspended from seabed sediments, the suspended ores are sent to the ore suction inlet (21) through the COANDA effect, at the moment, the ores are sucked into the conveying pipeline (17) under the action of the pumping system (8) and then sent into the storage tank of the storage feeding system (9), the ores are sent to the main winnowing pipeline (4) through the feeding machine of the storage feeding system (9), and the ores are lifted to the water surface supporting ship (1) on the sea surface through the main winnowing pipeline (4), so that the whole mining process is completed.
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| CN112127893A (en) * | 2020-10-15 | 2020-12-25 | 中国船舶工业集团公司第七0八研究所 | Deep sea self-propelled suspension type collection ore machine |
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