CN111980710B - Recyclable and continuous natural gas hydrate exploitation device with desulfurization system and exploitation method - Google Patents
Recyclable and continuous natural gas hydrate exploitation device with desulfurization system and exploitation method Download PDFInfo
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- CN111980710B CN111980710B CN202010809769.3A CN202010809769A CN111980710B CN 111980710 B CN111980710 B CN 111980710B CN 202010809769 A CN202010809769 A CN 202010809769A CN 111980710 B CN111980710 B CN 111980710B
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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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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
Abstract
The invention relates to a device and a method for realizing continuous and cyclic exploitation and desulfurization of natural gas hydrate, which are provided with an offshore and excavation system and a hoisting deviceThe system comprises a system, a hydrate decomposition system, a waste backfilling system and a hydrate method natural gas desulfurization system. The method adopts a double-channel continuous pipe as a drill rod, adopts the methods of directional drilling and high-pressure jet flow to crush along a natural gas hydrate layer, and forms a slurry mixture; the slurry mixture is conveyed to a decomposition and separation device through an ore pulp conveying pipeline inside the double-channel continuous pipe, natural gas is collected and used after being desulfurized after the slurry mixture is decomposed and separated, and liquid waste and solid waste are conveyed to a mined area through high-pressure fluid of the double-channel continuous pipe to be backfilled. The method has the advantages of integrated drilling and production, continuous production, controllable direction and removal of H from the collected natural gas 2 S, and meanwhile, the waste is backfilled to the mined-out area, so that the possibility of geological disasters is reduced.
Description
Technical Field
The invention belongs to the technical field of marine natural gas hydrate exploitation, and particularly relates to a recyclable and continuous natural gas hydrate exploitation device with a desulfurization system.
Background
After the 21 st century, with the rapid economic growth of countries in the world, the urgent need of society for energy is prompted, and the energy crisis has become one of the most prominent problems in many countries in the world today. With the consumption of traditional energy sources, a novel energy source substance with huge reserves, clean combustion and high utilization rate has to be searched to replace the traditional energy source substances such as petroleum, coal and the like, and the novel energy source substance is the natural gas hydrate.
Natural gas hydrates are ice-like solid compounds formed by natural gas (the main component methane) and water under certain high-pressure and low-temperature conditions. It is widely distributed on landThe environment of frozen soil layers and ocean deep water layers, most of hydrates in the world are stored in submarine sediments, and few hydrates are distributed on perennial frozen land. Statistically, the total amount of hydrates stored in the ocean is about 2.83X 10 15 m 3 Which is 100 times the amount of land resources. China obtains actual sediment samples in 5 months in 2007 in northern slope regions of south China sea, obtains hydrate sample samples in 11 months in 2008 and 6 months in 2009 in 6 months in south China in Qilian mountain south China, and proves that China has abundant reserves of hydrates and huge exploitation potential. These advantages make natural gas hydrate one of the most potential new energy sources in the 21 st century.
However, there are still many bottleneck problems to be solved for economically, efficiently and safely exploiting the hydrate. The traditional method for exploiting mineral resources or petroleum resources cannot be directly applied to exploitation of natural gas hydrates. At present, natural gas hydrate exploitation methods at home and abroad can be summarized into two ideas: one is that natural gas hydrate is decomposed in situ in a reservoir by adopting a physical and chemical method, and then natural gas generated by decomposition is extracted; the other is mechanical mining of hydrate reservoir, which first obtains deposit debris containing hydrate and then decomposes the hydrate by other physical and chemical means to produce natural gas. The corresponding hydrate mining methods mainly include a depressurization method, a thermal shock method, a chemical reagent injection method, a displacement method, a solid-state fluidization mining method, a mutual combination method of the methods and the like. However, each method has limitations in view of the current pilot production results. Therefore, the effect of gas hydrate mining is not ideal. In addition, natural gas also contains H 2 S, etc. non-hydrocarbon gas, domestic H 2 1/4 of natural gas reserves with the S mole fraction of more than 1 percent in the total reserves, H in the natural gas of Puguang gas field 2 The mole fraction of S is as high as 13-18%. H 2 The existence of S not only causes serious corrosion to equipment such as pipelines, storage tanks and the like, but also harms human health and causes pollution to the environment. Furthermore, H 2 The presence of S also increases the formation temperature of natural gas hydrates, making them more susceptible to plugging during pipeline transportation. Therefore, it must be removed. Aged light entering equivalent gas waterThermodynamic equilibrium conditions of the compound systematic experimental study was carried out and single-component CH was found 4 、H 2 The condition difference of S gas generating hydrate in pure water is obvious, the hydrate generating pressure is increased along with the increase of temperature, and the hydrate generating pressure is equal to CH 4 In contrast, H 2 S can generate hydrate under the conditions of lower temperature and pressure. At the same temperature, H 2 S forms hydrate at a pressure much less than CH 4 Pressure of formation of hydrate, description H 2 S is easier to form hydrate and can be realized by a hydrate method 4 +H 2 S) separating the mixed gas.
In patent documents of 'exploitation device and exploitation method of hydrate on shallow surface of seabed' with application number '201811485346. X', a method for exploiting hydrate by using a seabed self-running mining vehicle is introduced, the seabed mining vehicle is controlled on a ship, and the mining vehicle carries out a series of decomposition operations after excavating hydrate and deposit on the seabed, so that natural gas is finally obtained. At present, the conventional self-propelled mining vehicle for the shallow seabed layer is adopted, but the conventional self-propelled mining vehicle is not suitable for the hydrate with a certain burial depth in the shallow seabed layer and has low economical efficiency. Moreover, the mining vehicle has low mining efficiency, so the patent provides a new improvement method to make up for the defects of the prior art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects of the existing exploitation scheme of the marine natural gas hydrate, the recyclable and continuous natural gas hydrate exploitation device with the desulfurization system is provided. In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a but continuous natural gas hydrate exploitation device of circulation with desulfurization system which characterized in that: the device comprises an excavating system, a hydrate decomposition system, an operation ship, a natural gas collecting and processing system and a waste backfilling system which are arranged from bottom to top in sequence;
the natural gas collecting and processing system comprises a water vapor absorption device, a hydrator filled with hydrogen sulfide absorption liquid and a gas storage tank which are sequentially connected through pipelines, wherein the top of the hydrator is provided with a gas outlet which is connected with the gas storage tank through a gas collecting pipe and used for receiving and storing the processed natural gas;
the excavating system comprises a cylindrical shell, the interior of the shell is sequentially connected with a high-speed spiral drill bit, a crusher, a natural gas hydrate storage device and a conveying pump through a conveying pipeline along a transmission direction, the natural gas hydrate is drilled through the high-speed spiral drill bit and is conveyed into the natural gas hydrate storage device after being crushed by the crusher, and a conveying belt is further arranged in the conveying pipeline between the natural gas hydrate storage device and the conveying pump and used for assisting in smooth conveying of the natural gas hydrate; the spiral drill bit is connected with a positioning system, a monitoring system and a propelling system; the positioning system is used for adjusting the drilling direction of the excavating system; the monitoring system is used for measuring formation physical parameters; the gas hydrate decomposition system is characterized by also comprising a gas hydrate output pipeline, wherein one end of the gas hydrate output pipeline extends into the excavation system and is connected with a delivery pump in the excavation system, and the other end of the gas hydrate output pipeline is connected with the hydrate decomposition system;
the hydrate decomposition system comprises a shell, a hydrate decomposer is arranged in the shell, a heating device is arranged in the hydrate decomposer and used for assisting the decomposition of the hydrate, a waste discharge port communicated with the hydrate decomposer is formed in the upper part of the shell, a gas outlet communicated with the hydrate decomposer is formed in the lower part of the shell, the waste discharge port is connected with a waste backfilling system through a waste backfilling conveying pipeline, and the gas outlet is connected with a water vapor absorption device through a pipeline; a lifting device is arranged between the hydrate decomposition system and the operation ship and used for lifting or descending the excavation system and the hydrate decomposition system, and the hydrate decomposition system is 10-30 meters below the sea surface in a working state;
the waste backfilling system comprises a mixing device and a processing device which are sequentially arranged on a waste backfilling conveying pipeline along the flowing direction of waste, one end, far away from the waste discharge port, of the waste backfilling conveying pipeline extends downwards to the excavating system and then bends backwards, the waste is discharged to the rear of the excavating system, and the front of the excavating system is the excavating advancing direction.
Further, the natural gas collecting and processing system also comprises H 2 S. resolver, H 2 The S decomposer is connected with the hydrator through a pipeline provided with a power pump, H 2 The S decomposer is used for receiving hydrogen sulfide hydrate generated in the hydrator and decomposing hydrogen sulfide gas; h 2 The top of the S decomposer is provided with an air outlet, and the air outlet is connected with a sulfur recovery device through a pipeline.
Furthermore, the natural gas collecting and processing system further comprises a liquid return pipe, a water circulation water injection pump is arranged on the liquid return pipe, and two ends of the liquid return pipe are respectively connected with the H 2 The bottom of the S decomposer is connected with the bottom of the hydrator and is used for connecting H 2 And (4) feeding the water decomposed in the S decomposer back to the hydrator.
A method of subsea hydrate production based on a recyclable continuous natural gas hydrate production facility with a desulfurization system as described above, comprising the steps of:
A. starting a lifting device to enable the hydrate decomposition system to descend to a position 10-30 meters below the sea surface, and then carrying out multi-angle multi-azimuth exploitation on the hydrate block by the high-speed spiral drill bit through the positioning system, the monitoring system and the propulsion system;
B. conveying the hydrate blocks extracted by the high-speed spiral drill bit into a crusher for crushing;
C. the crushed hydrate fragments are conveyed to a natural gas storage device, conveyed to a hydrate decomposition system through a natural gas hydrate output pipeline, and decomposed through a hydrate decomposer;
D. the generated solid waste enters a mixing device to mix and store various wastes, then enters a slurry treatment device, is treated into slurry by the slurry treatment device, and then is backfilled into the deep sea by a waste backfilling and conveying pipeline;
E. the produced natural gas enters a hydrator through a water vapor absorption device, and H in the hydrator 2 S preferentially enters the solid phase with water hydrate, and CH 4 And the water comes out from the top of the hydrator and is conveyed to a gas storage tank through a gas collecting pipe for storage.
The invention has the beneficial effects that: (1) the invention has compact structure, energy saving, low exploitation cost of natural gas and high collection efficiency. (2) The invention is notThe temperature and the pressure of a seabed hydrate ore bed are changed, the hydrate is prevented from being decomposed, the extracted liquid waste and solid waste are conveyed to an extracted area by high-pressure fluid of a double-channel continuous pipe to be backfilled, and environmental damage and geological disasters are prevented. (3) The decomposer is arranged in a shallow sea area (10-30 meters below the sea surface), so that the decomposition temperature and the decomposition pressure of the hydrate are easily reached, the technical problem caused by the fact that the hydrate is lifted to a higher height in an output pipeline is avoided, and the phenomenon that methane gas overflows into the air to heat a greenhouse is avoided. (4) The invention carries out CH on the collected natural gas through the hydrator 4 And H 2 And separating S to finally obtain the purified natural gas after desulfurization.
Drawings
Fig. 1 is a diagram of a recyclable continuous natural gas hydrate production apparatus with a desulfurization system in an embodiment of the present invention, in which the direction of arrows indicates the direction of fluid flow in a pipeline.
Fig. 2 is a view showing the internal structure of a natural gas transportation pipeline.
In the figure: 1-a power plant; 2-control equipment; 3-a gas storage tank; 4-a water vapor absorbing device; 5-a gas collecting pipe; 6-a lifting device; 7-a digging system; 8-high speed auger bit; 9-a crusher; 10-a natural gas hydrate reservoir device; 11-a positioning system; 12-a propulsion system; 14-transport pipe; 15-hydrate dissociation systems; a 16-hydrate decomposer; 17-a waste backfill system; 18-a mixing device; 19-a mud treatment device; 20-a natural gas hydrate output pipeline; 21-backfilling the waste material into the conveying pipeline; 22-a heating device; 23-a monitoring system; 24-a delivery pump; 25-a conveyor belt; 26-a shovel storage bin; 27-a hydrator; 28-H 2 S, a decomposer; 29-water circulation water injection pump; 30-a sulfur recovery unit; 31-power pump.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1 and fig. 2, a circulating and continuous natural gas hydrate exploitation device with a desulfurization system comprises an excavation system 7, a hydrate decomposition system 15 and a working ship which are arranged in sequence from bottom to top, and further comprises a power device 1, a control device 2, a natural gas collection and treatment system and a waste backfilling system 17 which are arranged at the top of the working ship. The hydrate excavating device further comprises an excavator storage bin 26 used for accommodating the excavating system 7, the excavating system 7 is stored in the excavator storage bin 26 in a non-working state, and when the working ship moves to an excavating station, the excavating system 7 is lowered to the sea to excavate hydrates.
The power plant 1 and the control plant 2 are electrically connected to each other, and are used for operation control and power supply of the circulating continuous gas hydrate production apparatus with a desulfurization system according to the present embodiment. The power equipment provides power for the whole set of equipment, and comprises power for deep sea mining, power for lifting the hydrate from the mining system 7 to the hydrate decomposer 16 through the output pipeline 20, power for lifting the natural gas and waste materials decomposed by the hydrate decomposer 16 to the water vapor absorption device 4 and the mixing device 18, and power for the double-channel continuous pipe 13.
The natural gas collecting and processing system comprises a water vapor absorption device 4, a hydrator 27 and a gas storage tank 3, wherein the water vapor absorption device 4, the hydrator 27 and the gas storage tank 3 are sequentially connected through pipelines, the hydrator 27 is internally provided with hydrogen sulfide absorption liquid, and the gas outlet is connected with the gas storage tank 3 through a gas collecting pipe 5 and used for receiving and storing processed natural gas. And also comprises H 2 S decomposer 28, H 2 The S decomposer 28 is connected to the hydrator 27 through a pipe provided with a power pump 31 for receiving the hydrogen sulfide hydrate generated in the hydrator 27 and decomposing it into hydrogen sulfide gas and water. H 2 The top of the S decomposer 28 is provided with an air outlet which is connected with a sulfur recovery device 30 through a pipeline. Also comprises a liquid return pipe, a water circulation water injection pump 29 is arranged on the liquid return pipe, and two ends of the liquid return pipe are respectively connected with the H 2 The bottom of the S decomposer 28 is connected with the bottom of the hydrator 27 for separating H 2 The water split in the S splitter 28 is returned to the hydrator 27.
The excavation system 7 comprises a cylindrical shell, the interior of the shell is sequentially connected and provided with a high-speed spiral drill bit 8, a crusher 9, a natural gas hydrate storage device 10 and a conveying pump 24 through a conveying pipeline 14 along a transmission direction, the natural gas hydrate is drilled through the high-speed spiral drill bit 8 and is conveyed into the conveying pipeline 14, the natural gas hydrate is conveyed into the natural gas hydrate storage device 10 after being crushed by the crusher 9, and a conveying belt 25 is further arranged in the conveying pipeline between the natural gas hydrate storage device 10 and the conveying pump 24 and used for assisting smooth conveying of the natural gas hydrate, so that energy consumption is saved. The auger bit 8 is connected to a positioning system 11, a monitoring system 23 and a propulsion system 12. The positioning system 11 is used for adjusting the drilling direction of the excavating system 7; the monitoring system 23 is used to measure formation physical parameters. The gas hydrate decomposition system further comprises a gas hydrate output pipeline 20, one end of the gas hydrate output pipeline 20 extends into the excavation system 7 and is connected with a delivery pump 24 in the excavation system 7, and the other end of the gas hydrate output pipeline 20 is connected with the hydrate decomposition system 15. The hydrate decomposition system 15 comprises a shell, a hydrate decomposer 16 is arranged in the shell, a heating device is arranged in the hydrate decomposer 16 and used for assisting the decomposition of the hydrate, a waste discharge port communicated with the hydrate decomposer 16 is formed in the upper portion of the shell, a gas outlet communicated with the hydrate decomposer 16 is formed in the lower portion of the shell, the waste discharge port is connected with a waste backfilling system 17 through a waste backfilling conveying pipeline 21, and the gas outlet is connected with the water vapor absorption device 4 through a pipeline. And a lifting device 6 is arranged between the hydrate decomposition system and the operation ship and used for lifting or lowering the excavation system 7 and the hydrate decomposition system 15, and in a working state, the hydrate decomposition system 15 is 10-30 meters below the sea surface.
The waste material backfilling system 17 comprises a mixing device 18 and a processing device 19 which are sequentially arranged on a waste material backfilling conveying pipeline 21 along the flow direction of the waste materials, one end of the waste material backfilling conveying pipeline 21, far away from the waste material discharge opening, extends downwards to the excavating system 7 and is bent backwards for discharging the waste materials to the back of the excavating system 7, and the front of the excavating system 7 is the excavating travelling direction.
The method for exploiting the underwater hydrates based on the recyclable continuous natural gas hydrate exploitation device with the desulfurization system comprises the following steps of:
A. the high-speed spiral drill bit 8 is used for flexibly mining the hydrate block body in multiple angles and multiple directions by virtue of the positioning system 11, the monitoring system 23 and the propulsion system 12 under the driving of the control device 2 for controlling the normal operation and closing of the whole recyclable continuous natural gas hydrate mining device with the desulfurization system;
B. the hydrate blocks extracted by the high-speed spiral drill bit 8 are conveyed into a crusher 9 to be crushed;
C. the crushed hydrate fragments are conveyed to a natural gas storage device 10, conveyed to a hydrate decomposition system 15 through a natural gas hydrate output pipeline 20, and decomposed through a hydrate decomposer 16;
D. the generated solid waste enters a mixing device 18 to mix and store various wastes, then enters a slurry treatment device 19, is treated into slurry by the slurry treatment device 19, and is conveyed to a waste backfill conveying pipeline 21 by a power device 1 to be backfilled into deep sea;
E. the produced natural gas enters the hydrator 27 through the water vapor absorption device 4 due to H 2 S vs. CH 4 Can form hydrate under relatively low temperature and pressure conditions, so that H is in the hydrator 27 2 S preferentially enters the solid phase with water hydrate, and CH 4 The water comes out from the top of the hydrator 27 and is conveyed to the air storage tank 3 through the air collecting pipe 5 for storage; h 2 The S hydrate slurry is pumped into H by the hydrator 27 through the power pump 31 2 S decomposer 28 decomposes, and decomposed H 2 The S is conveyed to a sulfur recovery device 30 through a gas collecting pipe 5 for storage, and finally conveyed to a sulfur plant for sulfur recovery, and the decomposed water is returned to the hydrator 27 through a water circulation water injection pump 29 for recycling.
Claims (4)
1. The utility model provides a circulated continuous gas hydrate exploitation device with desulfurization system for deep sea gas hydrate exploitation, its characterized in that: comprises an excavating system (7), a hydrate decomposition system (15), an operation ship, a natural gas collecting and processing system and a waste backfilling system (17) which are arranged from bottom to top in sequence;
the natural gas collecting and processing system comprises a water vapor absorption device (4), a hydrator (27) filled with hydrogen sulfide absorption liquid and a gas storage tank (3) which are sequentially connected through pipelines, wherein the top of the hydrator (27) is provided with a gas outlet, and the gas outlet is connected with the gas storage tank (3) through a gas collecting pipe (5) and used for receiving and storing the processed natural gas;
the excavating system (7) comprises a cylindrical shell, the interior of the shell is sequentially and sequentially connected with a high-speed spiral drill bit (8), a crusher (9), a natural gas hydrate storage device (10) and a conveying pump (24) through a conveying pipeline (14) along the transmission direction, the natural gas hydrate is drilled through the high-speed spiral drill bit (8), is crushed by the crusher (9) and then is conveyed into the natural gas hydrate storage device (10), and a conveying belt (25) is further arranged in the conveying pipeline between the natural gas hydrate storage device (10) and the conveying pump (24) and used for assisting smooth conveying of the natural gas hydrate; the high-speed spiral drill bit (8) is connected with a positioning system (11), a monitoring system (23) and a propulsion system (12); the positioning system (11) is used for adjusting the drilling direction of the excavating system (7); the monitoring system (23) is used for measuring formation physical parameters; the gas hydrate decomposition system is characterized by further comprising a gas hydrate output pipeline (20), wherein one end of the gas hydrate output pipeline (20) extends into the excavation system (7) and is connected with a conveying pump (24) in the excavation system (7), and the other end of the gas hydrate output pipeline (20) is connected with the hydrate decomposition system (15);
the hydrate decomposition system (15) comprises a shell, a hydrate decomposer (16) is arranged in the shell, a heating device is arranged in the hydrate decomposer (16) and used for assisting the decomposition of the hydrate, a waste discharge port communicated with the hydrate decomposer (16) is formed in the upper portion of the shell, a gas outlet communicated with the hydrate decomposer (16) is formed in the lower portion of the shell, the waste discharge port is connected with a waste backfilling system (17) through a waste backfilling conveying pipeline (21), and the gas outlet is connected with a water vapor absorption device (4) through a pipeline; a lifting device (6) is arranged between the hydrate decomposition system and the operation ship and used for lifting or descending the excavation system (7) and the hydrate decomposition system (15), and in a working state, the hydrate decomposition system (15) is 10-30 meters below the sea surface;
the waste backfilling system (17) comprises a mixing device (18) and a slurry treatment device (19) which are sequentially arranged on a waste backfilling conveying pipeline (21) along the flow direction of waste, the generated solid waste enters the mixing device (18) to mix and store various wastes, then enters the slurry treatment device (19), and is treated into slurry shape by the slurry treatment device (19); one end of the waste backfilling conveying pipeline (21) far away from the waste discharge port extends downwards to the excavating system (7) and then bends backwards, the waste backfilling conveying pipeline is used for discharging the waste processed into slurry to the back of the excavating system (7), and the front of the excavating system (7) is an excavating advancing direction.
2. The apparatus for the continuous production of natural gas hydrates with desulfurization system of claim 1, wherein: the natural gas collecting and processing system also comprises H 2 S decomposer (28), H 2 The S decomposer (28) is connected with the hydrator (27) through a pipeline provided with a power pump (31), H 2 The S decomposer (28) is used for receiving the hydrogen sulfide hydrate generated in the hydrator (27) and decomposing hydrogen sulfide gas; h 2 The top of the S decomposer (28) is provided with an air outlet which is connected with a sulfur recovery device (30) through a pipeline.
3. The recyclable continuous natural gas hydrate mining apparatus with a desulfurization system as claimed in claim 2, wherein: the natural gas collecting and processing system further comprises a liquid return pipe, a water circulation water injection pump (29) is arranged on the liquid return pipe, and two ends of the liquid return pipe are respectively connected with the H 2 The bottom of the S decomposer (28) is connected with the bottom of the hydrator (27) for separating H 2 The water decomposed in the S decomposer (28) is sent back to the hydrator (27).
4. A method of mining a hydrate in the sea, comprising: based on the recyclable continuous natural gas hydrate production facility with desulfurization system as claimed in any one of claims 1 to 3, comprising the steps of:
A. starting a lifting device to enable the hydrate decomposition system (15) to descend to a position 10-30 meters below the sea surface, and then carrying out multi-angle multi-azimuth exploitation on the hydrate block by the high-speed spiral drill bit (8) through the positioning system (11), the monitoring system (23) and the propulsion system (12);
B. hydrate blocks extracted by the high-speed spiral drill bit (8) are conveyed to a crusher (9) to be crushed;
C. the crushed hydrate debris is conveyed to a natural gas hydrate storage device (10), conveyed to a hydrate decomposition system (15) through a natural gas hydrate output pipeline (20), and decomposed through a hydrate decomposer (16);
D. the generated solid waste enters a mixing device (18) to mix and store various wastes, then enters a slurry treatment device (19), is treated into slurry by the slurry treatment device (19), and is backfilled into the deep sea by a waste backfilling conveying pipeline (21);
E. the produced natural gas enters a hydrator (27) through a water vapor absorption device (4), and H in the hydrator (27) 2 S preferentially enters the solid phase with water hydrate, and CH 4 And the water comes out from the top of the hydrator (27) and is conveyed to a gas storage tank (3) for storage through a gas collecting pipe (5).
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| CN108222892A (en) * | 2018-01-10 | 2018-06-29 | 吉林大学 | A kind of quarrying apparatus and method of continuous exploiting ocean gas hydrate |
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| CN209385100U (en) * | 2018-10-29 | 2019-09-13 | 长江大学 | A kind of recyclable gas hydrate exploitation device |
| CN109488258B (en) * | 2018-12-06 | 2019-08-06 | 青岛海洋地质研究所 | Sea-bottom surface hydrate quarrying apparatus and its recovery method |
| CN110016374B (en) * | 2019-04-25 | 2021-05-11 | 西南石油大学 | Method and equipment for directly separating H2S in natural gas by hydrate method at well head |
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