CN114396282B - System and method for realizing submarine multi-resource combined exploitation by utilizing temperature difference energy - Google Patents
System and method for realizing submarine multi-resource combined exploitation by utilizing temperature difference energy Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000005065 mining Methods 0.000 claims abstract description 30
- 238000010248 power generation Methods 0.000 claims abstract description 18
- 239000002351 wastewater Substances 0.000 claims abstract description 15
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 85
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 68
- 239000007788 liquid Substances 0.000 claims description 36
- 239000010410 layer Substances 0.000 claims description 27
- 238000003860 storage Methods 0.000 claims description 23
- 238000005191 phase separation Methods 0.000 claims description 19
- 239000002002 slurry Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 13
- 239000002344 surface layer Substances 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 11
- 238000003809 water extraction Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 239000013535 sea water Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000005243 fluidization Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 4
- 239000011707 mineral Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C50/00—Obtaining minerals from underwater, not otherwise provided for
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/29—Obtaining a slurry of minerals, e.g. by using nozzles
- E21B43/292—Obtaining a slurry of minerals, e.g. by using nozzles using steerable or laterally extendable nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
- F03G7/05—Ocean thermal energy conversion, i.e. OTEC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
The invention discloses a system and a method for realizing submarine multi-resource combined exploitation by utilizing temperature difference energy, the system comprises a semi-submersible platform, a conventional generator set, a thermoelectric power generation module, a submarine mining module, a hydrate mining module, a shallow gas mining module and a wastewater treatment module. By the scheme, the invention can realize low-carbon, economical and safe exploitation of shallow gas, hydrate and submarine ore resources. The invention utilizes ocean temperature difference energy to generate electricity and utilizes the electric energy on site, thereby solving the problem of high electricity generation and transportation cost of deep ocean temperature difference energy; the temperature difference energy is adopted to generate power, power is provided for exploitation of submarine mineral resources, shallow gas and hydrate resources, exploitation cost is saved, carbon emission is reduced, and the effects of energy conservation and carbon reduction are achieved; waste water generated by the thermoelectric power generation is reinjected into the gas reservoir, so that the problem of waste water treatment can be solved, the pressure of the gas reservoir can be maintained, and the upper covering layer is prevented from collapsing. The invention has high practical value and popularization value.
Description
Technical Field
The invention belongs to the technical field of energy exploitation, and particularly relates to a system and a realization method for realizing submarine multi-resource combined exploitation by utilizing temperature difference energy.
Background
The ocean temperature difference energy resource is huge, and reasonable development and utilization of the temperature difference energy are beneficial to achieving the double-carbon target. However, for deep sea areas, the ocean temperature difference energy power generation and transmission cost is extremely high, so that the availability value is not high. In addition to ocean temperature difference energy, deep sea areas are also endowed with abundant submarine mineral resources, shallow gas, natural gas hydrate energy sources and the like. If the electric power generated by the ocean temperature difference energy is utilized in situ, the method not only solves the problem of electric power transmission, but also greatly reduces the exploitation cost of the resources, reduces carbon emission and is beneficial to realizing the energy-saving and carbon-reduction targets. However, little research is currently done on the combined exploitation direction of ocean temperature differential energy and submarine minerals, shallow gas and hydrates, and no specific technical solution is involved. Therefore, how to solve the problems existing in the prior art is a problem that a person skilled in the art needs to solve.
Disclosure of Invention
The invention aims to provide a system and a method for realizing multi-resource joint exploitation of the seabed by utilizing temperature difference energy.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The system for realizing the submarine multi-resource combined exploitation by utilizing the temperature difference energy is characterized by comprising a semi-submersible platform consisting of a conventional generator set, a temperature difference energy power generation module, a submarine exploitation module, a hydrate exploitation module, a shallow gas exploitation module and a wastewater treatment module;
the submarine mining module comprises a submarine mine cable connected with a conventional generator set, a submarine mining pump which is used for providing electric energy through the submarine mine cable and lifting submarine mine, a submarine mining vehicle which is used for providing kinetic energy through the submarine mining pump to mine submarine mine and wring and suck ore particles and deep cold water, an ore pulp lifting pipe connected with the submarine mining pump, a solid-liquid two-phase separation device communicated with a liquid outlet of the ore pulp lifting pipe, and a submarine mine storage tank with a liquid inlet communicated with the solid-liquid two-phase separation device, wherein the solid-liquid two-phase separation device is used for separating the ore particles and the deep cold water.
The temperature difference energy power generation module comprises a surface-layer warm water extraction pipe for extracting ocean surface-layer warm water, a temperature difference energy power generation unit communicated with a liquid outlet of the surface-layer warm water extraction pipe and used for providing a heat source, a cold water conveying pipe with a liquid outlet communicated with the temperature difference energy power generation unit, and a cold water storage tank communicated with the cold water conveying pipe, wherein the cold water conveying pipe is used for conveying deep cold water in separated submarine ores and hydrate fluidized exploitation and providing a cold source for the temperature difference energy power generation unit, and the temperature difference energy power generation unit provides electric energy for submarine ore cables.
The hydrate exploitation module comprises a hydrate cable which is connected with a conventional generator set and a temperature difference energy generator set at the same time, a hydrate submarine pump which is used for providing electric energy through the hydrate cable and is used for forming high-pressure fluid with deep sea water, a double-layer pipe outer annular space which is connected with the hydrate submarine pump, a hydrate slurry recovery port which is positioned at a liquid inlet of the double-layer pipe outer annular space, a jet breaking nozzle which is positioned at a hydrate slurry recovery port end and is used for breaking a hydrate reservoir, a hydrate lifting pipe which is connected with the hydrate submarine pump through the liquid inlet, a solid-liquid-gas three-phase separation device which is communicated with a cold water storage tank and a liquid outlet of the hydrate lifting pipe at the same time, and a sand storage tank and a gas treatment device which are respectively communicated with the solid-liquid-gas three-phase separation device through double-layer pipe inner pipes, wherein the hydrate slurry enters the hydrate submarine pump.
The shallow gas exploitation module comprises a gas conveying pipeline with a gas outlet end communicated with the gas treatment device, and a shallow gas exploitation well with one end penetrating through the cover layer and extending into the shallow gas reservoir and the other end communicated with the gas inlet end of the gas conveying pipeline.
The waste water treatment module comprises a waste water backfill pipeline, a reinjection well and a waste water treatment module, wherein the liquid inlet is connected with the temperature difference energy generator set and used for collecting liquid in the cold water conveying pipe and the surface-layer warm water extraction pipe, the liquid inlet is communicated with the waste water backfill pipeline, and the liquid outlet is positioned in the shallow gas reservoir.
The implementation method of the system for realizing the submarine multi-resource combined exploitation by utilizing the temperature difference energy is characterized by comprising the following specific steps:
(S1) starting a conventional generator set to power subsea mining and hydrate mining through a subsea mine cable and a hydrate cable, respectively;
(S2) the submarine mining vehicle starts to mine submarine ores, so that the submarine mining vehicle is crushed into ore particles, the ore particles and the deep cold water are lifted by a submarine mining pump together with the deep cold water, submarine ore pulp is conveyed through an ore pulp lifting pipe, the ore particles and the deep cold water are separated through a solid-liquid two-phase separation device, the ore particles are stored in a submarine ore storage tank, and the deep cold water is concentrated in the cold water storage tank;
(S3) pumping deep cold water by a hydrate submarine pump, pumping the deep cold water into an annulus outside a double-layer underground pipe to form a high-pressure fluid, performing jet crushing in a hydrate reservoir by using a jet crushing nozzle, fluidizing solid hydrate to form hydrate slurry, recycling the hydrate slurry into an inner pipe of the double-layer pipe through a hydrate slurry recycling port, decomposing the hydrate slurry in a hydrate lifting pipe to form solid-liquid-gas three phases, separating sand, gas and deep cold water by a solid-liquid-gas three-phase separation device, and storing the sand, gas and deep cold water in a sand storage tank, a gas treatment device and a cold water storage tank respectively;
(S4) the shallow gas exploitation well penetrates through the cover layer to reach the shallow gas reservoir for exploitation, and gas enters the gas treatment device through the shallow gas exploitation well and the gas conveying pipeline;
(S5) deep cold water in the cold water storage tank is conveyed to a temperature difference energy generator set through a cold water conveying pipe, surface-layer warm water is extracted by a surface-layer warm water extracting pipe and conveyed to the temperature difference energy generator set, and the temperature difference energy generator set is started to work and provide electric energy for a hydrate submarine pump and a submarine mining pump;
(S6) the waste water generated by the temperature difference energy generator set enters a shallow gas reservoir through a waste water backfill pipeline and a reinjection well, so that the pressure balance of the shallow gas reservoir can be maintained, and the collapse of a cover layer caused by pressure reduction after gas extraction is prevented;
(S7) closing the conventional generator set, and repeating the steps S2-S6.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention utilizes ocean temperature difference energy to generate power and utilizes the ocean temperature difference energy on site, thereby solving the problem of high power generation and transportation cost of deep ocean temperature difference energy;
(2) The invention adopts the temperature difference energy to generate electricity, provides power for exploitation of submarine mineral resources, shallow gas and hydrate resources, saves the exploitation cost, reduces the carbon emission and plays a role in energy conservation and carbon reduction;
(3) The waste water generated by the thermoelectric power generation is reinjected into the gas reservoir, so that the waste water treatment problem can be solved, the pressure of the gas reservoir can be maintained, and the upper covering layer is prevented from collapsing.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the above figures, the reference numerals correspond to the component names as follows:
The device comprises a 1-conventional generator set, a 2-hydrate cable, a 3-hydrate submarine pump, a 4-double-layer pipe outer annulus, a 5-hydrate reservoir, a 6-jet breaking nozzle, a 7-hydrate slurry recovery port, an 8-double-layer pipe inner pipe, a 9-hydrate lifting pipe, a 10-solid-liquid-gas three-phase separation device, an 11-sand storage tank, a 12-gas treatment device, a 13-cold water storage tank, a 14-cold water delivery pipe, a 15-thermoelectric generator set, a 16-surface warm water extraction pipe, 17-surface warm water, 18-submarine ores, 19-submarine cables, a 20-submarine mining vehicle, a 21-submarine mining pump, a 22-ore pulp lifting pipe, a 23-solid-liquid two-phase separation device, a 24-submarine ore storage tank, a 25-gas delivery pipeline, a 26-shallow gas extraction well, a 27-shallow gas storage tank, a 28-waste water backfill pipeline, a 29-reinjection well, a 30-cover layer and 31-deep cold water.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and examples, embodiments of which include, but are not limited to, the following examples.
Examples
The conventional generator set generates electricity, and the generated electricity provides kinetic energy for the subsea mining pump 21 and the hydrate subsea pump 3 through the subsea mine cable 19 and the hydrate cable 2, respectively. The submarine mining pump 21 drives the submarine mining vehicle 20 to mine the submarine ores 18 and wring and suck ore particles and deep cold water 31, then the submarine ore pulp is lifted to a solid-liquid two-phase separation device 23 communicated with a liquid outlet of the ore pulp lifting pipe 22 through the ore pulp lifting pipe 22, the solid-liquid two-phase separation device 23 collects the submarine ores in the submarine ore storage tank 24 through separation, and the separated deep cold water 31 is conveyed to the cold water storage tank 13. The hydrate submarine pump 3 pumps deep cold water, the deep cold water reaches the hydrate reservoir 5 through the double-layer pipe outer annulus 4 under the action of a pumping pressure, jet crushing and fluidization exploitation is carried out through the jet crushing nozzle 6, formed hydrate slurry is recovered through the hydrate slurry recovery port 7 and conveyed to a platform through the double-layer pipe inner pipe 8, the deep cold water 31 is conveyed to the cold water reservoir tank 13 through the separation effect of the solid-liquid-gas three-phase separation device 10 after reaching the platform, the extracted sand is collected in the sand reservoir tank 11, the extracted natural gas is collected in the gas treatment device 12, and the separated deep cold water 31 is conveyed to the cold water reservoir tank 13. Deep cold water 31 in the cold water storage tank 13 is conveyed to the thermoelectric power generator set 15 through the cold water conveying pipe 14, and a cold source is provided for thermoelectric power generation.
The thermoelectric generator set 15 is used for converting seawater thermoelectric energy into electric energy, and mainly comprises an evaporator, a condenser, a generator, a turbine and other related devices. The temperature difference energy generator set 15 heats and gasifies the low boiling point liquid working medium by using the surface layer warm water 17, or gasifies the sea water by reducing the pressure, and then the high pressure gas is conveyed to a turbine for doing work; the turbine rotates and drives the generator to rotate for generating electricity, and the high-pressure gas is converted into low-pressure gas; finally, the dead steam after work is condensed by using deep cold water 31 extracted from the seabed to be changed into liquid again, so that a system circulation is formed.
After the temperature difference energy generating set 15 generates sufficient electricity by utilizing the temperature difference energy of the seawater, the conventional generating set is turned off. The electrical energy generated by the temperature difference energy provides kinetic energy to the subsea mining pump 21 and the hydrate subsea pump 3 via the subsea mine cable 19 and the hydrate cable 2, respectively.
A shallow gas reservoir 27 is often associated with the vicinity of the hydrate reservoir, and shallow gas is produced by a shallow gas production module for multi-resource combined production. The shallow gas extraction module comprises a gas delivery conduit 25 having a gas outlet end in communication with the gas treatment device 12, and a shallow gas extraction well 26 having one end extending through the cap layer into a shallow gas reservoir 27 and the other end in communication with the gas inlet end of the gas delivery conduit 25. The produced shallow gas is collected in the gas treatment device 12.
A reinjection well 29 is drilled between the shallow gas reservoir 27 and the platform and is communicated with the thermoelectric generator set 15 through a waste water backfill pipeline 28. The waste water generated by the temperature difference energy generator set 15 enters the shallow gas reservoir 27 through the waste water backfill pipeline 28 and the reinjection well 29, so that the pressure balance of the shallow gas reservoir 27 can be maintained, the collapse of the cover layer 30 caused by the pressure reduction after gas extraction is prevented, and meanwhile, the waste water generated by the temperature difference energy can be treated, the platform is prevented from being provided with a waste water treatment system, and the space of the platform is greatly saved.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the scope of the present invention, but all changes made by adopting the design principle of the present invention and performing non-creative work on the basis thereof shall fall within the scope of the present invention.
Claims (3)
1. The system for realizing the submarine multi-resource combined exploitation by utilizing the temperature difference energy is characterized by comprising a semi-submersible platform consisting of a conventional generator set (1), a temperature difference energy power generation module, a submarine exploitation module, a hydrate exploitation module, a shallow gas exploitation module and a wastewater treatment module;
The submarine mining module comprises a submarine mine cable (19) connected with a conventional generator set (1), a submarine mining pump (21) for providing electric energy through the submarine mine cable (19) and lifting submarine mine, a submarine mining vehicle (20) for providing kinetic energy through the submarine mining pump (21) to mine submarine mine and wring and suck ore particles and deep cold water, an ore pulp lifting pipe (22) connected with the submarine mining pump (21), a solid-liquid two-phase separation device (23) communicated with a liquid outlet of the ore pulp lifting pipe (22), and a submarine mine storage tank (24) communicated with the solid-liquid two-phase separation device (23) through a liquid inlet, wherein the solid-liquid two-phase separation device (23) is used for separating the ore particles and the deep cold water (31);
The temperature difference energy power generation module comprises a surface-layer warm water extraction pipe (16) for extracting ocean surface-layer warm water, a temperature difference energy power generation unit (15) which is communicated with a liquid outlet of the surface-layer warm water extraction pipe (16) and is used for providing a heat source, a cold water conveying pipe (14) which is communicated with the temperature difference energy power generation unit (15), and a cold water storage tank (13) which is communicated with the cold water conveying pipe (14), wherein the cold water conveying pipe (14) is used for conveying deep cold water (31) in separated submarine ores and hydrate fluidization exploitation and providing a cold source for the temperature difference energy power generation unit (15), and the temperature difference energy power generation unit (15) provides electric energy for submarine ore cables (19);
The hydrate exploitation module comprises a hydrate cable (2) which is connected with a conventional generator set (1) and a temperature difference energy generator set (15) at the same time, a hydrate submarine pump (3) which is used for providing electric energy for deep sea water (31) to form high-pressure fluid through the hydrate cable (2), a double-layer pipe outer annular space (4) which is connected with the hydrate submarine pump (3) through a liquid outlet, a hydrate slurry recovery port (7) which is positioned at a liquid inlet of the double-layer pipe outer annular space (4), a jet breaking nozzle (6) which is positioned at the end of the hydrate slurry recovery port (7) and is used for breaking a hydrate reservoir, a hydrate lifting pipe (9) which is connected with the hydrate submarine pump (3) through the hydrate cable (2), a solid-liquid-gas three-phase separation device (10) which is simultaneously communicated with a cold water reservoir tank (13) and the liquid outlet of the hydrate lifting pipe (9), and a sand reservoir tank (11) and gas which are respectively communicated with the solid-liquid-gas three-phase separation device (10) through the liquid inlet;
The shallow gas exploitation module comprises a gas conveying pipeline (25) with a gas outlet end communicated with the gas treatment device (12), and a shallow gas exploitation well (26) with one end penetrating through the cover layer and extending into a shallow gas reservoir (27) and the other end communicated with the gas inlet end of the gas conveying pipeline (25).
2. The system for realizing the multi-resource combined exploitation on the sea floor by utilizing the temperature difference energy according to claim 1, wherein the wastewater treatment module comprises a wastewater backfill pipeline (28) which is connected with a temperature difference energy generator set (15) and used for collecting liquid in a cold water conveying pipe (14) and a surface warm water extraction pipe (16), and a reinjection well (29) which is communicated with the wastewater backfill pipeline (28) and is provided with a liquid outlet in a shallow gas reservoir (27).
3. The method for realizing the system for realizing the multi-resource joint exploitation on the sea floor by utilizing the temperature difference energy according to claim 2, which is characterized by comprising the following specific steps:
(S1) starting a conventional generator set (1) to power submarine mining and hydrate mining respectively through a submarine mine cable (19) and a hydrate cable (2);
(S2) the submarine mining vehicle (20) starts to mine submarine ores (18) so as to crush the submarine ores into ore particles, the ore particles and the deep-layer cold water (31) are lifted by a submarine mining pump (21) together with deep-layer cold water (31), submarine ore pulp is conveyed through an ore pulp lifting pipe (22), the ore particles and the deep-layer cold water (31) are separated through a solid-liquid two-phase separation device (23), the ore particles are stored in a submarine ore storage tank (24), and the deep-layer cold water (31) is concentrated in a cold water storage tank (13);
(S3) extracting deep cold water (31) by a hydrate submarine pump (3), pumping the deep cold water (31) into an underground double-layer pipe outer annulus (4) to form high-pressure fluid, performing jet crushing by using a jet crushing nozzle (6) in a hydrate reservoir (5), fluidizing solid hydrate to form hydrate slurry, recycling the hydrate slurry into a double-layer pipe inner pipe (8) through a hydrate slurry recycling port (7), decomposing the hydrate slurry into solid, liquid and gas three phases in a hydrate lifting pipe (9), separating sand, gas and deep cold water (31) by a solid, liquid and gas three-phase separation device (10), and respectively storing the sand, gas and deep cold water in a sand storage tank (11), a gas treatment device (12) and a cold water storage tank (13);
(S4) a shallow gas exploitation well (26) penetrates through the cover layer (30) to reach a shallow gas reservoir (27) for exploitation, and gas enters the gas treatment device (12) through the shallow gas exploitation well (26) and the gas conveying pipeline (25);
(S5) deep cold water (31) in the cold water storage tank (13) is conveyed to a thermoelectric energy generator set (15) through a cold water conveying pipe (14), surface-layer warm water is extracted by a surface-layer warm water extracting pipe (16) and conveyed to the thermoelectric energy generator set (15), and the thermoelectric energy generator set (15) is started to work and provides electric energy for a hydrate submarine pump (3) and a submarine mining pump (21);
(S6) waste water generated by the temperature difference energy generator set (15) enters a shallow gas reservoir (27) through a waste water backfill pipeline (28) and a reinjection well (29) and is used for keeping the pressure balance of the shallow gas reservoir (27) and preventing a covering layer (30) from collapsing due to pressure reduction after gas extraction;
and (S7) closing the conventional generator set (1), and repeating the steps S2-S6.
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| CN115126486A (en) * | 2022-06-30 | 2022-09-30 | 三联泵业股份有限公司 | Green high-efficiency high-reliability deep-sea mining multiphase mixed transportation lifting system |
| CN115263314B (en) * | 2022-08-09 | 2024-06-07 | 西南石油大学 | Method and system for assisting seabed mining lifting using natural gas hydrate decomposition gas |
| CN117449858B (en) * | 2023-11-20 | 2025-02-07 | 江苏科技大学 | A deep sea mining energy recovery system combining temperature difference energy generation |
| CN118622273B (en) * | 2024-08-05 | 2025-01-24 | 中国海洋大学 | A combined mining system and method suitable for deep-sea ore and gas energy |
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| CN101666286A (en) * | 2009-09-28 | 2010-03-10 | 中国海洋石油总公司 | System for integrally exploiting marine energy resource |
| CN112228075A (en) * | 2020-10-22 | 2021-01-15 | 常州大学 | Device for exploiting marine weakly cemented non-diagenetic natural gas hydrate and its exploitation method |
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| CN112228075A (en) * | 2020-10-22 | 2021-01-15 | 常州大学 | Device for exploiting marine weakly cemented non-diagenetic natural gas hydrate and its exploitation method |
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