CN109661501A - Gas hydrate recovery method and gas hydrate recyclable device - Google Patents
Gas hydrate recovery method and gas hydrate recyclable device Download PDFInfo
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- CN109661501A CN109661501A CN201780055615.6A CN201780055615A CN109661501A CN 109661501 A CN109661501 A CN 109661501A CN 201780055615 A CN201780055615 A CN 201780055615A CN 109661501 A CN109661501 A CN 109661501A
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- Prior art keywords
- gas
- water
- separate pot
- hydrate
- standpipe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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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
Abstract
Present invention offer can inhibit gas hydrate recovery method and gas hydrate recyclable device that the environment in water changes with the recycling of gas hydrate.The gas hydrate recovery method is to be laid with standpipe 4 from the bottom 2 of gas separate pot 5 downwards, block-like gas hydrate m is drunk up simultaneously and is extracted to the method for gas separate pot 5 by the water of recovery port 4a and the bottom 2 from 4 lower end of standpipe, wherein, it is laid with discharge pipe 9 from gas separate pot 5 to the bottom 2, the water at the bottom 2 extracted from recovery port 4a is all expelled to the bottom 2 from the outlet 9a of 9 lower end of discharge pipe.
Description
Technical field
The present invention relates to the gas hydrates that water-bed block-like gas hydrate and water-bed water are extracted and recycled simultaneously
Object recovery method and gas hydrate recyclable device are specifically related to can inhibit environment the returning with gas hydrate in water
The gas hydrate recovery method and gas hydrate recyclable device received and changed.
Background technique
Propose the gas of various recycling methane gas hydrate existing for seabed or lakebed (hereinafter sometimes referred to water-bed)
Gas hydrate recyclable device (referring for example to patent document 1).
Patent document 1, which is proposed, simultaneously extracts block-like gas hydrate to marine equipment with water-bed water, and recycling is molten
Change the gas hydrate recyclable device for the gas that block-like gas hydrate generates.By the water-bed water after gas recovery drain to
Surface layer near the water surface.
The bottom due to burying gas hydrate is about 400m with deep (and deeper), so water and conduct near the bottom
The property of the water on the surface layer near the water surface is different.Specifically, the type or amount of the microorganism contained in respective water are different, salt
Class or the type or concentration of trace meter are different, and the type or concentration of the gases such as the molten nitrogen deposited or oxygen are different.
Therefore, if water-bed water is drained the surface layer to the water surface, the environment in the water on surface layer can change.In the water
The variation of environment is sometimes undesirable from the position of the viewpoint of environmental protection or biology.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2015-31097 bulletin.
Summary of the invention
Problems to be solved by the invention
The present invention carries out in view of the above problems, it is intended that offer can inhibit the environment in water with gas hydrate
The gas hydrate recovery method and gas hydrate recyclable device of recycling and variation.
Means for solving the problems
Gas hydrate recovery method for reaching above-mentioned purpose is the water-bed laying standpipe from gas separate pot downwards, from
Block-like gas hydrate is drunk up simultaneously and is extracted to the gas by the water at the recovery port of the lower riser end and the bottom
The gas hydrate recovery method of knockout drum, which is characterized in that, will from the gas separate pot to the water-bed laying discharge pipe
The bottom all is returned to from the outlet of the discharge pipe lower end from the water at the bottom that the recovery port extracts.
Gas hydrate recyclable device for reaching above-mentioned purpose is that have from water-bed extend upwards to exist and will be
The standpipe that the block-like gas hydrate of the water-bed recycling and the water at the bottom are drunk up simultaneously and the upper end with the standpipe
Connect and flow into the gas hydrate recyclable device of the gas separate pot of the block-like gas hydrate drunk up, feature
It is have from the gas separate pot to the water-bed existing discharge pipe of extension, have returning from the lower riser end
The water at the bottom that closing in is extracted all returns to the structure at the bottom from the outlet of the discharge pipe lower end.
Invention effect
Gas hydrate recovery method and gas hydrate recyclable device according to the present invention, due to not flowed in the water of bottom recycling
All be sent back to the bottom to other regions out, thus for inhibiting the environment in water with the recycling of gas hydrate and
Variation is advantageous.
Brief description
[Fig. 1] Fig. 1 is the explanatory diagram of example gas hydrate recyclable device of the invention.
[Fig. 2] Fig. 2 is the explanatory diagram of the structure of the gas hydrate recyclable device of exemplary diagram 1.
[Fig. 3] Fig. 3 is the explanatory diagram of the variation of the gas hydrate recyclable device of exemplary diagram 2.
[Fig. 4] Fig. 4 is the explanatory diagram of the variation of the gas hydrate recyclable device of exemplary diagram 2.
[Fig. 5] Fig. 5 is the explanatory diagram of the variation of the gas hydrate recyclable device of exemplary diagram 2.
Specific embodiment
Hereinafter, illustrating gas hydrate recovery method and gas hydrate of the invention based on embodiment shown in figure
Recyclable device.
As depicted in figs. 1 and 2, gas hydrate recyclable device 1 of the invention has: excavating at the bottom as sea or lake
Methane gas hydrate m existing for the bottom 2, traps the digging mechanism 3 of block-like gas hydrate m；With will be caught with digging mechanism 3
The standpipe 4 that the gas hydrate m of collection is conveyed upwards near the bottom 2.
Digging mechanism 3 can be for example made of drill bit or underwater heavy equipment.It's not limited to that for the structure of digging mechanism 3,
As long as having the structure excavated the bottom 2 and block-like gas hydrate m is sent to the recovery port 4a to 4 lower end of standpipe.
Standpipe 4 can for example be constituted by extending existing cylindrical body in above-below direction.The recovery port 4a of 4 lower end of standpipe is configured
Near the bottom 2.It is water-bed in the present specification nearby to refer to from the bottom 2 upwards to the region of 10m or so.Near the bottom
Range is not limited to above range, can be suitable for setting.Range near the bottom can be for example set as from the bottom 2 upwards to 2m's
Range, or be set as from the bottom 2 upwards to the range of 50m.
4 upper end of standpipe is directly or indirectly connect with gas separate pot 5.Ship or floating body for being configured near the water surface etc.
Structural body 6 be arranged gas separate pot 5.What the structural body 6 for being provided with gas separate pot 5 was not limited to configure near the water surface
Ship etc., the floating body etc. that can also be configured by the building on land or in water are constituted.
Gas separate pot 5 have from water-bed water separate due tos fusing of block-like gas hydrate etc. near the bottom 2,
The function of the gas generated inside 4 inside of standpipe or gas separate pot 5.The gas separate pot 5 can have the block-like gas of gasification
The function of hydrate m.Gas separate pot 5 has: internal gas g is taken out to external gas recoverer 7；With by one end with
The gas supply line 8 that gas recoverer 7 connects.Gas feed line 8 the other end connection savings gas g accumulator tank or
Gas g is delivered to the pipeline on consumption ground.
The discharge pipe 9 being laid with to the bottom 2 is directly or indirectly connect with gas separate pot 5.Discharge pipe 9 is for example by tubular
Body is constituted, by the outlet 9a configuration of lower end near the bottom 2.
Send the block-like gas hydrate m for excavating and trapping using digging mechanism 3 at the bottom 2 to returning to 4 lower end of standpipe
Closing in 4a.Due to the gas resource comprising methane gas etc. inside gas hydrate m, specific gravity is smaller, so vertical due to buoyancy
It is moved upward in pipe 4.
Since closer to the water surface, hydraulic pressure becomes smaller, and temperature becomes higher, so the gas hydrate risen in standpipe 4
Object m fusing, generates the bubble of gas g sometimes.Since closer to 4 upper end of standpipe, the amount of bubble more increases, so closer to upper
It holds, the density of the fluid in standpipe 4 becomes smaller.
Since the recovery port 4a of standpipe 4 and the difference in specific gravity of upper end become larger, so on being generated in standpipe 4 due to the difference in specific gravity
Up-flow.Generate effect identical with so-called air lift pump.Pass through standpipe 4 and block-like gas hydrate using the upper up-flow
M simultaneously by the bottom 2 near water or sand drink up, be recycled to gas separate pot 5.It can be set as that the dynamic of pump etc. is arranged in standpipe 4
Power source is blown into gas to the inside of standpipe 4 to generate bubble, and the structure of upper up-flow is initiatively generated in standpipe 4.
It is, for example, depth of water 400m or more there are the bottom 2 of gas hydrate m, the water temperature of the water at the bottom 2 is 5 DEG C or less.With
It is opposite, the structural bodies such as ship 6 be arranged gas separate pot 5 around be, for example, 20 DEG C or so.Compared with the bottom 2,
Since the temperature in gas separate pot 5 is higher, so gas hydrate m melts in gas separate pot 5, gas g is generated.Separately
Outside, the gas g generated during flowing in standpipe 4 by the fusing of gas hydrate m is recycled to gas separate pot 5.
The gas g of methane in gasification tank 5 etc. is taken out from gas recoverer 7 to as the gas outside gas separate pot 5
Body feeding pipe 8.Gas recoverer 7 for example can be by only from the check-valves of the interior mobile gas of gas separate pot 5
It constitutes.
Due to gas recoverer 7 have taken out inside gas separate pot 5 using the gas g of methane gas etc. as resource to
While external, fluid is prevented to flow into internal structure from the outside of gas separate pot 5, so the gas of atmosphere etc. can be prevented
Or the liquid of seawater etc. flows into gas separate pot 5.Thus it can prevent in an atmosphere or present in the water of surface layer and middle layer
Microorganism etc. is mixed into the inside of gas separate pot 5.
Surface layer for example indicates depth of water 10m ~ to the region of the water surface in the present specification.In addition, middle layer expression is clipped in surface layer
With near the bottom between region.The range on surface layer is not limited to above range, can be suitable for setting.The range on surface layer for example may be used
It is set as from the water surface to the range of depth of water 2m or is set as range from the water surface to depth of water 50m.
Gas recoverer 7 can be by making gas only in the pump mobile from the direction that the interior of gas separate pot 5 flows
Deng composition.
It with gas hydrate m water and the sand etc. for being recycled to gas separate pot 5 is simultaneously recycled from the bottom 2.In addition, with
The fusing of gas hydrate m and the water that generates is also to recycle from the bottom 2.All of which is returned into the bottom by discharge pipe 9
2。
It can be set as the non-fusible block-like gas hydrate m for being recycled to gas separate pot 5, and block is directly recycled to savings
Tank etc. is delivered to the structure on consumption ground.In this case, a part that will constitute the water of gas hydrate m is separated from gas
It takes out to outside the inside of tank 5.Even in this case, it will also be taken out simultaneously from the recovery port 4a of standpipe 4 with gas hydrate m
The water at the bottom 2 taken all passes through discharge pipe 9 and returns to the bottom 2.
It can be set as that the power source of pump etc. is arranged in discharge pipe 9, it will be from the water of 2 recycling of the bottom or sand etc. from gas separate pot
5 return to the structure at the bottom 2.
It is carried out continuously the extraction of the gas hydrate m using standpipe 4 in this embodiment, in gas separate pot 5
Gasification is carried out continuously the discharge using discharge pipe 9 in parallel.In other words, it is carried out continuously the recycling of gas hydrate m.
As shown in Fig. 2, gas hydrate recyclable device 1 has the outlet in the recovery port 4a from standpipe 4 to discharge pipe 9
In the path c of 9a, the cycle of states of outside is not flowed out to from the inside of path c from the water at bottom 2 that recovery port 4a is recycled
Structure.
Additionally, it is preferred that be set as using in the substance from 2 recycling of the bottom other than gas as resource reclaim etc., not
The state for flowing out to the outside of path c is expelled to the structure at the bottom 2 from outlet 9a.In this configuration by from the bottom 2 recycling
The solids such as sand also all return to the bottom 2 from outlet 9a.In addition, the water that will be generated by the fusing of gas hydrate m
Return to the bottom 2.
According to above structure, the microorganism etc. contained in the water or sand at the bottom 2 etc. be will not flow out to surface layer or middle layer
Deng other regions.The variation of environment is advantageous in water for inhibiting surface layer or middle layer etc..
The water at the different bottom 2 of the type or content of the salt contained or trace meter or sand etc. will not be expelled to table
Other regions such as layer.For inhibit the different water of ingredient to mix and lead to surface layer etc. water in the variation of environment be advantageous.
The water at the different bottom 2 of the type of the gas of the molten nitrogen deposited, oxygen or methane etc. or concentration or sand etc. will not be arranged
Out to other regions such as surface layer.The variation of environment is advantageous in water for inhibiting surface layer etc..
Gas hydrate recyclable device 1 can be set as in the path of the outlet 9a of the recovery port 4a from standpipe 4 to discharge pipe 9
In c, structure that water of surrounding etc. does not flow into internally from the outside of path c.In other words, with the fusing of gas hydrate m and
Liquid other than the water of generation and the water at the bottom 2 does not flow into path c.Thus the water that can inhibit other regions such as surface layer is mixed into
To the water etc. for flowing through the bottom 2 inside the c of path.The variation of environment is advantageous in water for inhibiting the bottom 2.
Path c indicates to return to 2 paths that are passed through of the bottom to from the water of 2 recycling of the bottom in the present specification, it is specific and
Speech, such as indicate the path being made of standpipe 4, gas separate pot 5 and discharge pipe 9.
In addition, the structure that the gas that can be set as atmosphere of surrounding etc. does not flow into internally from the outside of path c.In other words,
Gas other than the gas generated with the fusing of gas hydrate m does not flow into path c.Thus can inhibit atmosphere be mixed into
Flow through the water etc. at the bottom 2 of the inside of path c.Due to can avoid microorganism contained in atmosphere etc. and the water for flowing through path c
The water at bottom 2 is sent simultaneously to the failure at the bottom 2, so the variation of environment is advantageous in the water for inhibiting the bottom 2.
The allocation position of outlet 9a is remoter apart from recovery port 4a, for inhibiting sand that will be discharged from outlet 9a etc. no
It necessarily drinks up from recovery port 4a and is more advantageous.The ratio of sand etc. is fewer in the fluid conveyed with standpipe 4, density p 1
Become smaller, the transfer efficiency for improving standpipe 4 is advantageous.
As shown in figure 3, can be set as that the structure of surge tank 5a is arranged between 4 upper end of standpipe and gas separate pot 5.In the reality
It applies in mode and connect standpipe 4 indirectly with gas separate pot 5.Surge tank 5a is temporarily put aside to be extracted simultaneously with the water at the bottom 2
Block-like gas hydrate m.Surge tank 5a, which has, is being moved to the same of gas separate pot 5 for natant gas hydrate m
When, the water without containing gas hydrate m is drained to the structure of discharge pipe 9 near the bottom of surge tank 5a.
At this point, path c exists from standpipe 4 via the path of surge tank 5a and gas separate pot 5 to discharge pipe 9 and from standpipe
4 via surge tank 5a to the two paths of the path of discharge pipe 9.
It measures as shown in figure 4, gas hydrate recyclable device 1 can be set as having through the fluid density inside standpipe 4
The structure of the piezometry mechanism 11 of density measurement mechanism 10 and the internal pressure of measurement gas separate pot 5.By density measurement machine
The internal or external tube wall etc. of standpipe 4 is arranged in structure 10.Density measurement mechanism 10 is preferably provided near 4 upper end of standpipe
Close to the position of gas separate pot 5.Upper side by the configuration of piezometry mechanism 11 in the inside of gas separate pot 5, has and surveys
Determine the structure of the pressure of gas phase portion.
Density measurement mechanism 10 and piezometry mechanism 11 are passed through into wired or wireless signal wire and control mechanism respectively
12 connections.Control mechanism 12 is for example configurable near gas separate pot 5.Control mechanism 12 has basis from density measurement machine
The value that structure 10 and piezometry mechanism 11 obtain, the knot of flow that control passes through gas recoverer 7 and takes out to external gas g
Structure.In the middle section for the piping being laid with from gas separate pot 5 to gas supply line 8, configuration gas is returned in this embodiment
Receipts portion 7.
It can be set as that the heating mechanism 13 to the water of the inside of gas separate pot 5 supply heat is arranged in gas separate pot 5.Heating
Mechanism 13 for example can be by being constituted using electrical supply come the heater to generate heat.By the heater configuration in gas separate pot 5
It is internal.
Heating mechanism 13 can for example be set as being formed and take out the water inside gas separate pot 5 to pipeline that is external and recycling,
The structure of heat exchange is carried out using the water on the higher such as surface layer of temperature as the outer side contacts of thermophore and the pipeline.Due to being in pipe
The structure of the movement of heat is only carried out in road, so water in gas separate pot 5 will not be contacted directly with the water on surface layer or atmosphere etc..
Heating mechanism 13 can be set as the knot that the configuration inside gas separate pot 5 makes the pipeline of the heat transfer medium circuits such as the water on surface layer
Structure.Water inside gas separate pot 5 is contacted with the wall surface of pipeline carries out heat exchange.The movement of heat, gas are only carried out in pipeline
Water inside knockout drum 5 will not be contacted directly with thermophore.
Heating mechanism 13 not necessarily needs to part in the present invention.In the case where heating mechanism 13 are arranged, it is preferably set to use
The structure that signal wire is connect with control mechanism 12.Using the structure, the controllable heating mechanism 13 that passes through of control mechanism 12 is to gas
The heat of water supply inside knockout drum 5.
Can be set as being arranged will take out from gas recoverer 7 to as the external methane gas of gas supply line 8 etc.
Gas is blown into the structure of internal gas lifting mechanism 14 from the middle section of standpipe 4.It can be increased using gas lifting mechanism 14 in standpipe 4
The flow velocity of the upper up-flow of middle generation.Due to being not the air etc. in atmosphere, but the gas g that will be recycled from gas hydrate m
It is blown into standpipe 4, so the microorganism etc. that can avoid in atmosphere is mixed into the failure for the fluid for flowing through standpipe 4.
As being the structure for taking out the gas g used in gas lifting mechanism 14 from gas supply line 8, so gas can be prevented
Pressure in body knockout drum 5 is changed because of the work of gas lifting mechanism 14.It can be set as taking out from gas separate pot 5 in gas lifting mechanism 14
Used in gas g structure.
Gas lifting mechanism 14 not necessarily needs to part in the present invention.In the case where gas lifting mechanism 14 are arranged, it is preferably set to
The intermediate setting pump 15 for the flow path that gas passes through, the structure for being connect the pump 15 with control mechanism 12 with signal wire.Utilize the knot
Structure, the flow of the controllable gas by the supply of gas lifting mechanism 14 into standpipe 4 of control mechanism 12.
The dehumidifying for the moisture that can contain in the intermediate setting removing gas for the flow path that gas passes through in gas lifting mechanism 14
Mechanism 16.For avoiding gas g and reaction of moisture in the flow path of gas lifting mechanism 14 from generating gas hydrate m, flow path is blocked
Failure is advantageous.
It can be set as the gas g that will be taken out from gas separate pot 5 for example to pressurize using compression mechanisms 17 such as pumps, supply to gas
Structure in knockout drum 5.Specifically, can for example be set as connecting gas supply line 8 and the return line 18 of gas separate pot 5
It is logical, in the structure of the middle section of the return line 18 setting compression mechanism 17.Using by gas g forced feed to gasification separation
The structure of tank 5, the control that can carry out making the pressure inside gas separate pot 5 to rise.
The structure provided gas tangentially in gas separate pot 5 in the present invention not necessarily needs to part.In setting compression mechanism
17 and return line 18 in the case where, be preferably set to the structure for being connect compression mechanism 17 with control mechanism 12 with signal wire.Benefit
With the structure, control mechanism 12 becomes easy the pressure controlled inside gas separate pot 5 by compression mechanism 17.
When with 1 gas recovery hydrate m of gas hydrate recyclable device, flowed through first with the measurement of density measurement mechanism 10
1 (the kg/m of density p of fluid inside standpipe 43).Although flowing through in the fluid inside standpipe 4 containing sand etc., also contain
Generated because of the fusing of gas hydrate m or from gas lifting mechanism 14 supply gas g bubble.Therefore, with the water outside standpipe 4
Become smaller compared to density.The density p 1 is, for example, 900kg/m3Left and right.Pass through increase in the case where having gas lifting mechanism 14
The flow for supplying the gas into standpipe 4, can reduce density p 1.
Since the density p 0 of the water outside standpipe 4 hardly changes throughout the year, so can be considered fixed value.The density p 0 is for example
For 1000kg/m3Left and right.
On the other hand, the pressure P1 (kg/m inside gas separate pot 5 is measured using piezometry mechanism 112).Herein
Pressure P1 indicates gauge pressure (measurement pressure).Gas separate pot 5 internal pressure P1 because with block-like gas hydrate m
Fusing generate gas g and increase.By taking out from gas recoverer 7 by gas g to outside, pressure P1 is reduced.In addition, pressure
P1 is because the water or other fluid at the bottom 2 is from standpipe 4 to increasing due to the inflow of gas separate pot 5, because to reducing due to the discharge of discharge pipe 9.
For the fluid in standpipe 4, the power pushed from recovery port 4a by hydraulic pressure works as upward power.Standpipe 4
In the quality of fluid work as downward power.In addition, the pressure P1 inside gas separate pot 5 is acted as downward power
With.Therefore, in order to extract the fluid in standpipe 4, need to meet following formulas 1.
[mathematical expression 1]
H indicates the depth of water (m) of the position of the recovery port 4a of configuration standpipe 4 herein.Following formula is obtained by the deformation of above-mentioned formula 1
2。
[mathematical expression 2]
ρ 0- ρ 1 indicates the difference of the density of the fluid of 4 inside of standpipe and outside herein.According to formula 2 it is found that in gas separate pot 5
The pressure P1 in portion is smaller, becomes the easier extraction for maintaining to utilize standpipe 4.Control mechanism 12 controls the pressure in gas separate pot 5
Power P1, so that the work by gas recoverer 7 takes out the gas g in gas separate pot 5 to outside, pressure P1 meets formula 1.
In the case where gas recoverer 7 is made of check-valves, the open pressure P1 for reducing gas separate pot 5 of check-valves can be passed through.
In the case where gas hydrate recyclable device 1 has gas lifting mechanism 14, control mechanism 12 can be set as passing through control
Pump 15 controls the structure of the amount for supplying gas g into standpipe 4.Since the supply amount of gas g more increases, the stream in standpipe 4
The density p 1 of body becomes smaller, so becoming easy the upper up-flow maintained in standpipe 4.
The control can carry out simultaneously with the control of above-mentioned gas recoverer 7.In other words, it can carry out reducing gas separate pot
While pressure P1 inside 5, reduce the control of the density p 1 of the fluid in standpipe 4.
If the depth of water H for excavating gas hydrate m does not change, the value on 1 left side of formula hardly changes, therefore can be considered normal
Number.Thus it can be set as adding inside gas separate pot 5 by the density p 1 of the fluid inside standpipe 4 and the product of depth of water H
The value that pressure P1 is obtained is the structure that the state of prescribed limit is controlled with control mechanism 12.
For the fluid in discharge pipe 9, the power pushed from outlet 9a by hydraulic pressure works as upward power.Discharge
The quality of fluid in pipe 9 works as downward power.In addition, the pressure P1 inside gas separate pot 5 is as downward power
It works.Therefore, in order to which the fluid in discharge pipe 9 is expelled to the bottom 2, need to meet following formulas 3.
[mathematical expression 3]
ρ 2 indicates the density (kg/m in the fluid of 5 internal residual of gas separate pot herein3).Due in gas separate pot 5
Part is from gas g, so the density p 2 in the fluid of 5 internal residual of gas separate pot increases.Water containing the bottom 2 in the fluid
With sand etc., density p 2 is, for example, 1100kg/m3Left and right.
The density p 2 of fluid in discharge pipe 9 becomes bigger than the density p 0 of external water.Therefore, inside gas separate pot 5
Pressure P1 become smaller than atmospheric pressure, if the value is not negative, the fluid in discharge pipe 9 can be moved to because of self weight the bottom 2.Root
According to formula 3 it is found that the pressure P1 inside gas separate pot 5 is bigger, the discharge using discharge pipe 9 is more effectively performed.
Control mechanism 12 passes through the job control pressure P1 of gas recoverer 7.It is made of in gas recoverer 7 check-valves
In the case of, by preventing the opening of check-valves, the pressure P1 of gas separate pot 5 can be increased.
In the case where gas hydrate recyclable device 1 has heating mechanism 13, control mechanism 12 can be set as passing through control
Heating mechanism 13 come control supplied to the inside of gas separate pot 5 heat amount structure.The amount of the heat of supply more increases, block-like
Gas hydrate m more melts, and generates gas g, and the pressure P1 inside gas separate pot 5 increases.
The control can carry out simultaneously with the control of above-mentioned gas recoverer 7.In other words, it can carry out stopping gas g from gas
While the amount for the gas g that the taking-up or inhibition of body knockout drum 5 are taken out, increase gas point by increasing the yield of gas g
Control from the pressure P1 inside tank 5.
In the case where gas hydrate recyclable device 1 has compression mechanism 17 and return line 18, control mechanism 12 can
It is set as by controlling compression mechanism 17, control is to 5 internal pressurization of gas separate pot come the structure of the flow of the gas g to flow back.For
The flow of the gas g given more increases, and the pressure P1 inside gas separate pot 5 more increases.
The control can carry out simultaneously with the control of above-mentioned gas recoverer 7 or heating mechanism 13.Using gas recoverer 7,
The control of the pressure P1 of heating mechanism 13 and compression mechanism 17 can only carry out one kind or carry out a variety of proper combinations.
According to above-mentioned formula 2 and formula 3, the pressure P1 inside gas separate pot 5 is smaller, more has for the extraction using standpipe 4
Benefit, pressure P1 is bigger, for more advantageous using the discharge of discharge pipe 9.Control mechanism 12 is adjusted the extraction and is discharged flat
The control of weighing apparatus.It, can simultaneously and company such as by control so that pressure P1 gas separate pot 5 inside is maintained atmospheric level
The extraction using standpipe 4 and the discharge using discharge pipe 9 are carried out continuously.
Due to the balance of the pressure at each position of 12 adjusts path c of control mechanism in this embodiment, so in Jiang Shui
The water at bottom 2, can be hardly using the dynamic of pump etc. from the path c that the bottom 2 returns to the bottom 2 via standpipe 4 and discharge pipe 9 again
Power and recycle water.Due to inhibiting the energy consumption of gas hydrate recyclable device 1, so when for raising resource reclaim
Energy efficiency is advantageous.
Due to that fluid can be made continuously to recycle in the c of path, so being for the circulation with lesser energy maintenance fluid
It is advantageous.In addition, being recycled in gas separate pot 5 using the structure for recycling fluid continuously for increase in the c of path
The amount of gas hydrate m per unit time is advantageous.
The circulation of fluid in the c of path is not limited to continous way as described above, can also be set as intermittent.Intermittent
In the case where, process of the process (hereinafter sometimes referred to extraction process) of gas hydrate m with gasifying gas hydrate m will be extracted
(hereinafter sometimes referred to gasification process) and process (the hereinafter sometimes referred to discharge work that water etc. is expelled to the bottom 2 using discharge pipe 9
Sequence) it separates to carry out.
In extracting process, gas hydrate m is extracted with standpipe 4 first, is recycled to gas separate pot 5.In gas hydrate
In the case that object m has heating mechanism 13, heating mechanism 13 is not made to work.It successively recycles from gas recoverer 7 in standpipe 4 or gas
Gas hydrate m melts the gas g generated naturally in body knockout drum 5.
Since gas g is successively expelled to outside from gas separate pot 5, so for keeping lesser gas separate pot 5
In pressure P1 be advantageous.By the pressure in the small gas separate pot 5 of holding, the extraction efficiency of standpipe 4 can be improved.
In extracting process, valve etc. can not had to and be closed discharge pipe 9 and be set as open state.Due to keeping lesser gas point
From the pressure P1 in tank 5, so fluid will not become like that the flow of 2 flowing of the bottom even if discharge pipe 9 is open state
Greatly.In addition, since the specific gravity of the block-like gas hydrate m compared with water in gas separate pot 5 etc. is smaller, so gas hydrate
A possibility that object m is almost without the bottom 2 is flowed out to from discharge pipe 9.Therefore, the block-like gas hydrate inside gas separate pot 5
The ratio of object m increases.
On the other hand, it can also be set as being closed discharge pipe 9 with valve etc., the water in gas separate pot 5 is not discharged from discharge pipe 9
To the structure at the bottom 2.
Gasification process is carried out after recycling the gas hydrate m of specified amount in gas separate pot 5.It will be stood in gasification process
The closure such as valve is utilized between pipe 4 and gas separate pot 5.Then, the gas hydrate m fusing in gas separate pot 5 generates gas
g.Gas recoverer 7 is preferably set to closed state at this time, keeps the pressure P1 in biggish gas separate pot 5.In gas hydrate
In the case that object recyclable device 1 has heating mechanism 13, heating mechanism 13 is made to work, promotes the fusing of gas hydrate m.
In gasification process, one side can be carried out and maintain the pressure P1 inside gas separate pot 5 to be the state of specified value or more,
Gas g is taken out from gas separate pot 5 to external control on one side.It can be set as control mechanism 12 at this time and control gas recoverer 7
Opening and closing and from heating mechanism 13 supply heat structure.
Discharge process carries out in parallel with gasification process.It will be separated in gas separate pot 5 with gas g in discharge process
Water or sand etc. sent using discharge pipe 9 to the bottom 2.Since the pressure P1 in gas separate pot 5 at this time is biggish state, institute
That water etc. effectively can be expelled to the bottom 2 from discharge pipe 9.
In the case where gas hydrate recyclable device 1 has compression mechanism 17 and return line 18, compression mechanism can be made
17 work are to increase the pressure P1 in gas separate pot 5.Thus water etc. can be expelled to the bottom 2 from discharge pipe 9 in a short time.
In gasification process and discharge process, since the closure such as valve will be utilized between gas separate pot 5 and standpipe 4, so
Even if the pressure P1 in gas separate pot 5 becomes larger, the anxiety of the recovery port 4a refluence of fluid to standpipe 4 there will not be.Due to will not
The block-like gas hydrate m to float in standpipe 4 by buoyancy is returned into the bottom 2, so for improving gas hydrate m
Recovery efficiency be advantageous.
As shown in figure 5, gas hydrate recyclable device 1 can be set as the structure for having two gas separate pots 5.Standpipe 4 has
It is standby: in the switching valve 19 of upper end configuration, and the manifold portion 4b that will be connected between the switching valve 19 and respective gas separate pot 5.
Discharge pipe 9 has in the same manner: in the switching valve 20 of upper end configuration, and will be between the switching valve 20 and respective gas separate pot 5
The manifold portion 9b of connection.Switch the gas separate pot 5 connecting with standpipe 4 and discharge pipe 9 using switching valve 19,20.In the reality
It applies in mode using described intermittent.
One gas separate pot 5 is connected to standpipe 4 by the work of switching valve 19 and carries out extraction process.Carry out extraction work
The gas separate pot 5 of sequence is the state by the work of switching valve 20 without being connected to discharge pipe 9.
After the gas hydrate m for recycling specified amount in the gas separate pot 5, it is set as in the work solution for passing through switching valve 19
While except connection with standpipe 4, the state that is connected to by the work of switching valve 20 with discharge pipe 9.Then, it is separated in the gas
Gasification process and discharge process are carried out in tank 5 simultaneously.Pressure P1 in gas separate pot 5 rises, and water etc. is discharged from discharge pipe 9
To the bottom 2.
When carrying out gasification process and discharge process in a gas separate pot 5, another gas separate pot 5 is set as and stands
The state that pipe 4 is connected to carries out extraction process.In other words, in two gas separate pots 5 one carry out extraction process, another into
Row gasification process and discharge process.By the work of switching valve 19,18, respective gas separate pot is switched in each stipulated time
The operation carried out in 5.
Since switching uses two gas separate pots 5, so standpipe 4 can not be stopped running through on one side on one side using intermittent
It is continuously flowed with the fluid of the inside of discharge pipe 9.If temporarily ceasing the flowing of the fluid of the inside of standpipe 4 and discharge pipe 9,
Then the overall length of standpipe 4 and discharge pipe 9 becomes longer, in order to flow again, more needs biggish energy.According to the embodiment,
The efficiency of energy required for resource reclaim can be improved.
In addition, due to can continuously carry out the dredge operation using digging mechanism 3 at the bottom 2 or utilize standpipe 4 and discharge
The movement of the fluid of pipe 9, so being advantageous for the efficiency for improving resource reclaim.
The quantity of gas separate pot 5 is not limited to two, can be set as setting three or more to switch the structure used.Example
It can such as be set as carrying out extraction process in first gas separate pot 5, carry out gasification process in second gas separate pot 5,
The structure of discharge process is carried out in third gas separate pot 5.In addition, can also be set as needing longer behaviour to gasification process etc.
The process for making the time distributes the structure of multiple gas separate pots 5.
Although the recycling of block-like gas hydrate m is illustrated, gas hydrate recyclable device 1 be can also be used for
The recycling of the gas g of generation is melted near the bottom 2.Such as even if digging mechanism 3 is in advance by the block-like gas at the bottom 2
The structure that hydrate m is melted and recycled can also apply gas hydrate recyclable device 1 of the invention.
The structure of gas hydrate recyclable device 1 of the invention is not limited to the recycling of gas hydrate m, it is also possible to make
The recyclable device of water-bed resource.Such as it can also be used for the recycling of the manganese nodule existing for the bottom 2 or returned from the resource of hydrothermal deposit
It receives.
Symbol description
1 gas hydrate recyclable device
2 is water-bed
3 digging mechanisms
4 standpipes
4a recovery port
4b manifold portion
5 gas separate pots
5a surge tank
6 structural bodies
7 gas recoverers
8 gas supply lines
9 discharge pipes
9a outlet
9b manifold portion
10 density measurement mechanisms
11 piezometry mechanisms
12 control mechanisms
13 heating mechanisms
14 gas lifting mechanisms
15 pumps
16 desiccant bodies
17 compression mechanisms
18 return lines
19 switching valves
20 switching valves
M gas hydrate
G gas
The path c
The density of fluid outside 0 standpipe of ρ
The density of the fluid of 1 riser interiors of ρ
The density of fluid inside 2 gas separate pot of ρ
Pressure inside P1 gas separate pot.
Claims (11)
1. gas hydrate recovery method is water-bed laying standpipe downwards from gas separate pot, from the lower riser end
Block-like gas hydrate is drunk up simultaneously and is extracted to the gas of the gas separate pot by the water at recovery port and the bottom
Hydrate recovery method, which is characterized in that
It is from the gas separate pot to the water-bed laying discharge pipe, the water at the bottom extracted from the recovery port is whole
The bottom is returned to from the outlet of the discharge pipe lower end.
2. gas hydrate recovery method described in claim 1, wherein do not flow into the block-like gas hydrate
Fusing and the liquid other than the water of water and bottom that generates, and described in being moved to the water at the bottom from the recovery port
Outlet.
3. gas hydrate recovery method of any of claims 1 or 2, wherein be arranged in the gas separate pot by the gas
Gas inside body knockout drum takes out to external gas recoverer, prevents fluid from the gas in the gas recoverer one side
The outside of body knockout drum flows into inside, on one side takes out the gas to outside.
4. gas hydrate recovery method as claimed in claim 3, wherein according to the density of the fluid in the standpipe and described
Pressure inside gas separate pot, control pass through the gas recoverer and take out to the flow of the external gas.
5. gas hydrate recovery method described in claim 3 or 4, wherein according to the density of the fluid in the standpipe and
Pressure inside the gas separate pot controls the amount of the heat supplied to the inside of the gas separate pot.
6. gas hydrate recovery method described in any one of claim 3 ~ 5, wherein will be out of described gas separate pot
It takes out to the external gas pressurized, supply to the gas separate pot in portion.
7. gas hydrate recovery method described in any one of claim 3 ~ 6, wherein inside the gas separate pot
Pressure becomes the depth of water locating for the difference of density and the recovery port of the standpipe of the fluid than the riser interiors and outside
The small state of product, control passes through the gas recoverer and takes out to flow, the Xiang Suoshu gas of the external gas
The hot amount or pressurization supplied inside knockout drum and supply into the flow of the gas of the gas separate pot at least one
Person.
8. gas hydrate recyclable device is that have from the water-bed bulk for extending upwards and existing and recycling at the bottom
Gas hydrate and the water at the bottom standpipe that drinks up simultaneously and connect and flow into the upper end of the standpipe and drink up
The gas hydrate recyclable device of the gas separate pot of the block-like gas hydrate, which is characterized in that
Have from the gas separate pot to the bottom and extend existing discharge pipe,
Water with the bottom that will be extracted from the recovery port of the lower riser end is all from the discharge of the discharge pipe lower end
Mouth returns to the structure at the bottom.
9. gas hydrate recyclable device according to any one of claims 8, wherein the gas separate pot has to be separated by the gas
Gas inside tank take out to it is external while, prevent fluid from outside from flowing into internal gas recoverer.
10. gas hydrate recyclable device as claimed in claim 9, has: measuring the close of the fluid density in the standpipe
Measuring means is spent, measures the piezometry mechanism of the internal pressure of the gas separate pot, and according to from the density measurement
The value control that mechanism and the piezometry mechanism obtain passes through the gas recoverer and takes out to the external gas
The control mechanism of flow.
11. gas hydrate recyclable device described in claim 9 or 10, has: via the gas recoverer and will take
The compression mechanism of gas pressurized extremely outside the gas separate pot out, and the gas to be pressurizeed with the compression mechanism is supplied
To the return line of the gas separate pot.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016220575A JP6713405B2 (en) | 2016-11-11 | 2016-11-11 | Gas hydrate recovery method and gas hydrate recovery device |
| JP2016-220575 | 2016-11-11 | ||
| PCT/JP2017/035138 WO2018088053A1 (en) | 2016-11-11 | 2017-09-28 | Gas hydrate recovery method and gas hydrate recovery device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109661501A true CN109661501A (en) | 2019-04-19 |
| CN109661501B CN109661501B (en) | 2021-05-18 |
Family
ID=62109749
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780055615.6A Active CN109661501B (en) | 2016-11-11 | 2017-09-28 | Gas hydrate recovery method and gas hydrate recovery device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6713405B2 (en) |
| CN (1) | CN109661501B (en) |
| WO (1) | WO2018088053A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7420683B2 (en) | 2020-08-26 | 2024-01-23 | 三井海洋開発株式会社 | Surface layer gas hydrate recovery method and surface layer gas hydrate recovery system |
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| JP2006037518A (en) * | 2004-07-27 | 2006-02-09 | Mitsubishi Heavy Ind Ltd | Gas hydrate collecting method and gas hydrate collecting system |
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| CN102308059A (en) * | 2009-02-13 | 2012-01-04 | 国际壳牌研究有限公司 | Method for converting hydrates buried in the waterbottom into a marketable hydrocarbon composition |
| JP2011196047A (en) * | 2010-03-18 | 2011-10-06 | Nippon Steel Engineering Co Ltd | System and method of lifting mineral |
| US20130306520A1 (en) * | 2012-05-18 | 2013-11-21 | Colin NIKIFORUK | Hydrocarbon processing |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2018076743A (en) | 2018-05-17 |
| WO2018088053A1 (en) | 2018-05-17 |
| JP6713405B2 (en) | 2020-06-24 |
| CN109661501B (en) | 2021-05-18 |
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