CN107987908A - Natural gas for combustible ice pilot production process is quickly formed and stored on-site system - Google Patents
Natural gas for combustible ice pilot production process is quickly formed and stored on-site system Download PDFInfo
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- CN107987908A CN107987908A CN201711180973.8A CN201711180973A CN107987908A CN 107987908 A CN107987908 A CN 107987908A CN 201711180973 A CN201711180973 A CN 201711180973A CN 107987908 A CN107987908 A CN 107987908A
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- hydrate
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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
- C10L3/108—Production of gas hydrates
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- Oil, Petroleum & Natural Gas (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of quick formation of natural gas for combustible ice pilot production process and stored on-site system, specifically includes hydrate generation unit, natural gas cycling element, water circulation unit, hydrate conveying and storage unit;Whole flow process is in situ on combustible ice pilot production platform to be carried out, and takes full advantage of produced gas and the pressure and temperature characteristic of recovered water, material cyclic utilization rate is high, energy consumption is low;The memory effect of hydrate is make use of, improves the generating rate of hydrate;Using multiple means such as hypergravity, bubbling, addition accelerating agents, the generating rate of hydrate can be improved, while improve the conversion ratio of natural gas;The armor effect of hydrate is make use of, gas hydrates are stored in the form of highly enriched hydrate slurry, improves the stability of gas hydrates storage.To sum up, the present invention can build hydrate natural gas storing device in the future for China and provide technical support, for the recycling important in inhibiting of China's associated gas and pilot production gas.
Description
Technical field
The invention belongs to combustible ice production technique field, and in particular to a kind of natural gas for combustible ice pilot production process is fast
Speed is formed and stored on-site system.
Background technology
In deepwater exploitation, associated gas is due to size limit, it is difficult to realizes effective recycling, while the companion of onshore oil field
Anger, the extraction natural gas of the Mining Test of the pilot production gas of oil gas field, Gas Hydrate are also all equally existed and recycled
The problem of difficult.Hydrate produced gas recycles and stored on-site technique is Formation and characteristics and bar based on gas hydrates
Part, solid hydrate is generated by the natural gas of extraction by the means such as cooling of pressurizeing, and with comparatively gentle condition storage, it is real
The recycling of existing natural gas and outer defeated, plays an important roll for the energy-saving and emission-reduction in promoting the recycling and oil field development of associated gas.
For the work characteristics of hydrate pilot production gas recovering device, it can be seen that hydrate associated gas and pilot production gas
Recycling in have unique advantage.Current many in the world oil companies and research institution are all storing up hydrate natural gas
The comprehensive research of cryopreservation device expansion, but mostly there are hydrate for existing hydrate natural gas storing device or technique both at home and abroad
The shortcomings such as generating rate is low, high energy consumption, material cyclic utilization rate are low, are not used to the stored on-site of natural gas pilot production process.This
Invention based on quickly being formed to gas hydrates and the research of the key technology such as stored on-site condition of storage, be China in the future
Build hydrate natural gas storing device and technical support is provided, this has important for China's associated gas and the recycling of pilot production gas
Meaning.
The content of the invention
To solve the above problems, the invention discloses a kind of quick formation of natural gas for combustible ice pilot production process and original
Position storage system, which has higher gas hydrates generating rate and natural gas transfer efficiency, and is followed with material
The characteristics of ring utilization rate is high, energy consumption is low, thus have great significance to China's associated gas and the recycling of pilot production gas.
To achieve these goals, the present invention adopts the following technical scheme that:
A kind of natural gas for combustible ice pilot production process is quickly formed and stored on-site system, including:Hydrate generates
Unit, natural gas cycling element, water circulation unit and hydrate conveying and storage unit;
The natural gas cycling element and water circulation unit are connected with hydrate generation unit respectively, the hydrate generation
Unit is conveyed with hydrate and storage unit is connected;
The hydrate generation unit includes hypergravity cyclone, and the produced gas of combustible ice pilot production process is throttled to hydrate
Enter hypergravity cyclone after pressure needed for generation, while the recovered water of combustible ice pilot production process is conveyed into hypergravity cyclone;
The produced gas and recovered water of combustible ice pilot production process common reaction generation hydrate in hypergravity cyclone group;Generated after reaction
Hydrate and unreacted water be collectively forming hydrate slurry, the hydrate slurry is conveyed through perhydrate and storage unit is realized
The stored on-site on combustible ice pilot production platform.
Further, the natural gas cycling element includes:Platform counterbalance valve and compressor;
Extraction gas pipeline, platform counterbalance valve, hydrate generation unit and compressor are sequentially connected, and the compressor connection is adopted
Outlet line forms natural gas circulation line.
It is anti-to be throttled to hydrate after extraction gas pipeline outflow by platform counterbalance valve for the produced gas of combustible ice pilot production process
Pressure is answered, is directly entered hydrate generation unit, unreacted produced gas is then flowed out from hydrate generation unit, through compressor liter
Mixed after pressure with produced gas, be again introduced into hydrate generation unit production gas hydrates.
Further, the water circulation unit includes:Water tank, water pump, surge tank, cyclone separator and circulating pump;
Extraction water pipeline, water tank, water pump, hydrate generation unit, surge tank, cyclone separator and circulating pump connect successively
Connect, the circulating pump connection extraction water pipeline forms water circulation pipe.
The recovered water of combustible ice pilot production process enters water tank after extraction water pipeline outflow, and water is delivered into by water pump
Compound generation unit, unreacted recovered water then enter surge tank from hydrate generation unit, after by surge tank export enter rotation
Wind separator, finally exits into circulating pump by cyclone separator lower part outlet, is transmitted back to water tank progress again through circulating pump
Recycle.
Further, the surge tank, water tank and circulating pump connect surge tank cooling device, water tank cooling dress respectively
Put and circulate pump refrigerating device.
Surge tank import is connected with the outlet of four hypergravity cyclones, and outlet is connected with the import of cyclone separator, outside
The surge tank cooling device that portion is equipped with can prevent decomposition of hydrate.
Water tank cooling device makes temperature in water tank maintain gas hydrates generation equal with giving water tank cold insulation
The temperature that weighs or so, facilitates hydrate nucleation and crystallization in water tank.
The circulation pump refrigerating device that circulating pump is equipped with, can prevent hydrate nucleus in unreacted recovered water from following flowing through
Ring decomposes when pumping.
Further, agitating device and bubbling device are respectively equipped with inside the water tank, the bubbling device will be a small amount of
Produced gas is blasted in water tank, and the shape of the dissolving of promoting the circulation of qi body and hydrate nucleus is mixed into by the agitating device and recovered water
Into.
Further, accelerating agent is added in the water tank.Accelerating agent can be SDS or other new accelerating agents, than
Such as:Nano-graphene, nonpolar hydrophobic acidic amino acid (leucine, tryptophan), A type molecular sieve etc.;
New accelerating agent is used to promote hydrate nucleation and crystallization, accelerates hydrate generating rate.
Further, the hydrate conveying and storage unit include:The throttling heat sink and hydrate of interconnection
Compaction apparatus;
The hydrate of generation is collectively forming hydration with unreacted water in hydrate generation unit in hydrate generation unit
Thing is starched, and the hydrate slurry is compacted into bulk after the heat sink that throttles into hydrate pressure type device, and is tried in combustible ice
Adopt and stored on-site is completed on platform.
Further, the volume fraction of the unreacted recovered water in the hydrate slurry is not more than a%, and a is setting value.
Further, the hypergravity cyclone is connected with hypergravity cyclone cooling device, carries out unified insulation.
Further, the tangential high speed of gas inlet tube of the produced gas of combustible ice pilot production process above hypergravity cyclone
Into and form centrifugal hypergravity field, the liquid inlet tube of the recovered water of combustible ice pilot production process above hypergravity cyclone into
Enter, and sprayed by the gas-liquid distributor above hypergravity cyclone and under.
Its acceleration of centrifugal hypergravity field be acceleration of gravity hundreds of even thousands of times, can make enter the flow field in
Water droplet and solid phase particles are constantly stretched under the action of significant shear power, are thinned, broken and scattered, so that participating in hydration
The gas-liquid-solid three-phase surface of reaction is constantly updated, and is reduced the armor effect in hydrate formation, is greatly promoted
Three alternate microcosmic mixing, enhance the generation of gas hydrates.
Beneficial effect of the present invention:
Whole natural gas adsorption and Stored Procedure are in situ on combustible ice pilot production platform to carry out, and takes full advantage of extraction
The pressure and temperature characteristic of gas and recovered water, material cyclic utilization rate is high, energy consumption is low;The memory effect of hydrate is make use of, is carried
The high generating rate of hydrate;Using hypergravity, bubbling, the multiple means such as accelerating agent are added, the generation of hydrate can be improved
Speed, while improve the conversion ratio of natural gas;The armor effect of hydrate is make use of, is deposited in the form of highly enriched hydrate slurry
Gas hydrates are stored up, improve the stability of gas hydrates storage.
The present invention can build hydrate natural gas storing device in the future for China and provide technical support, for China's association
The recycling important in inhibiting of gas and pilot production gas.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structure diagram of the present invention;
Wherein, 1- hypergravities cyclone, 2- platform counterbalance valves, 3- water pumps, 4- attemperators, the cooling of 5- hypergravities cyclone
Device, 6- surge tanks, 7- gas inlet tubes, 8- liquid inlet tubes, 9- gas-liquid distributors, 10- cyclone separators, 11- surge tanks
Cooling device, 12- extraction gas pipelines, 13- gas circulation pipelines, 14- compressors, 15- circulating pumps, 16- water tanks, 17- bubblings
Device, 18- agitating devices, 19- circulation pump refrigerating devices, 20- throttling heat sinks, 21- hydrate compaction apparatus, 22- water storages
Tank cooling device.
Embodiment
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
It is noted that described further below is all illustrative, it is intended to provides further instruction to the present invention.It is unless another
Indicate, all technical and scientific terms used herein has usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
The present invention provides a kind of quick formation of natural gas for combustible ice pilot production process and stored on-site system, this is
System has higher gas hydrates generating rate and natural gas transfer efficiency, and with material cyclic utilization rate height, energy consumption
The characteristics of low, have great significance China's associated gas and the recycling of pilot production gas.Concrete structure is as shown in Figure 1, including hydrate
Generation unit, natural gas cycling element, water circulation unit, hydrate conveying and storage unit;
The core equipment of hydrate generation unit is one group of hypergravity cyclone 1, and the produced gas of combustible ice pilot production process passes through
Platform counterbalance valve 2 enters hypergravity cyclone 1, while combustible ice pilot production process after being throttled to pressure needed for hydrate generation technique
Recovered water through water pump 3 conveying after enter hypergravity cyclone 1;The produced gas and recovered water of combustible ice pilot production process are in hypergravity
Common reaction generation hydrate in cyclone 1;Hypergravity cyclone 1 is equipped with attemperator 4, whole hypergravity eddy flow in technique
Temperature in device 1 maintains the temperature and pressure needed for hydrate generation technique all the time.
Preferably, 1 a diameter of 0.3m of hypergravity cyclone, length 1.2m, tetrad are exterior to be revolved equipped with hypergravity
Stream device cooling device 5 carries out unified insulation, and four 1 outlet at bottom of hypergravity cyclone are connected with same surge tank 6, natural gas
Treating capacity is 10000Nm3/d;In hydrate generation technique, gas inlet tube 7 of the produced gas above hypergravity cyclone 1 is cut
To entering at a high speed and forming powerful centrifugal hypergravity field, liquid inlet tube 8 of the recovered water above hypergravity cyclone enters,
And sprayed by the gas-liquid distributor 9 of the top of hypergravity cyclone 1 and under;
Its acceleration of centrifugal hypergravity field be acceleration of gravity hundreds of even thousands of times, can make enter the flow field in
Water droplet and solid phase particles are constantly stretched under the action of significant shear power, are thinned, broken and scattered, so that participating in hydration
The gas-liquid-solid three-phase surface of reaction is constantly updated, and is reduced the armor effect in hydrate formation, is greatly promoted
Three alternate microcosmic mixing, enhance the generation of gas hydrates.
Preferably, 6 import of surge tank is connected with the outlet of four hypergravity cyclones 1, outlet and cyclone separator 10
Import is connected, and outside prevents decomposition of hydrate equipped with surge tank cooling device 11.
The core equipment used in natural gas cycling element is compressor 14, and the produced gas of combustible ice pilot production process is from extraction
After gas pipeline 12 flows out, hydrate reaction pressure is throttled to by platform counterbalance valve 2, is directly entered hypergravity cyclone 1, saved
Compression energy consumes, unreacted produced gas then the gas circulation pipeline 13 above hypergravity cyclone 1 through 14 liters of compressor
Mixed after pressure with produced gas, be again introduced into production gas hydrates in hypergravity cyclone 1.
The core equipment used in water circulation unit has water pump 3, circulating pump 15, water tank 16 and cyclone separator 10, can
The recovered water for firing ice pilot production process enters water tank 16 after extraction water pipeline outflow, is conveyed by water pump 3 from hypergravity eddy flow
The liquid inlet tube 7 of the top of device 1 enters hypergravity cyclone 1, unreacted recovered water then going out from 1 bottom of hypergravity cyclone
Mouthful enter surge tank 6, after exported by surge tank 6 into cyclone separator 10, finally by the outflow of 10 lower part outlet of cyclone separator
Into circulating pump 15, water tank 16 is transmitted back to again through circulating pump 15 and is recycled;
Preferably, accelerating agent THF or SDS are added in water tank 16, the water storage pot bottom uses bubbling device 17, will
A small amount of produced gas is blasted in water tank 16, and the dissolving of promoting the circulation of qi body and the formation of hydrate nucleus are mixed into recovered water;The water storage
There are agitating device 18 and water tank cooling device 22 in tank 16, recovered water can contain a small amount of gas and water after the outflow of water tank 16
Compound nucleus.
Preferably, partially hydrated thing nucleus is contained in unreacted recovered water, the nucleation of hydrate can be promoted.
Preferably, circulating pump has circulation pump refrigerating device 19 with 15, prevents the hydrate nucleus in unreacted recovered water
Decomposed when flowing through circulating pump 15.
Hydrate conveys and the core equipment of storage unit mainly includes throttling heat sink 20 and hydrate compaction apparatus
21, the hydrate of the interior generation of hypergravity cyclone 1 is collectively forming hydrate with unreacted recovered water in hypergravity cyclone 1
Slurry, hydrate slurry is compacted into bulk after throttling heat sink 20 is flowed through into hydrate pressure type device 21, and is tried in combustible ice
Adopt and stored on-site is completed on platform;
Preferably, the unreacted recovered water in hydrate slurry through cyclone separator 10 after separating, in the hydrate slurry
The volume fraction of unreacted recovered water should be less than 5%.
Preferably, after hydrate slurry flows through throttling heat sink 20, temperature should reach -15 DEG C or so, and pressure should reach
1MPa or so.
Although above-mentioned be described the embodiment of the present invention with reference to attached drawing, model not is protected to the present invention
The limitation enclosed, those skilled in the art should understand that, on the basis of technical scheme, those skilled in the art are not
Need to make the creative labor the various modifications that can be made or deformation still within protection scope of the present invention.
Claims (10)
1. a kind of natural gas for combustible ice pilot production process is quickly formed and stored on-site system, it is characterised in that including:Water
Compound generation unit, natural gas cycling element, water circulation unit and hydrate conveying and storage unit;
The natural gas cycling element and water circulation unit are connected with hydrate generation unit respectively, the hydrate generation unit
It is connected with hydrate conveying and storage unit;
The hydrate generation unit includes hypergravity cyclone, and the produced gas of combustible ice pilot production process is throttled to hydrate generation
Enter hypergravity cyclone after required pressure, while the recovered water of combustible ice pilot production process is conveyed into hypergravity cyclone;It is flammable
The produced gas and recovered water of ice pilot production process common reaction generation hydrate in hypergravity cyclone group;The water generated after reaction
Compound and unreacted water are collectively forming hydrate slurry, and the hydrate slurry is conveyed through perhydrate and storage unit is realized can
Fire stored on-site on ice pilot production platform.
2. a kind of natural gas for combustible ice pilot production process as claimed in claim 1 is quickly formed and stored on-site system,
It is characterized in that, the natural gas cycling element includes:Platform counterbalance valve and compressor;
Extraction gas pipeline, platform counterbalance valve, hydrate generation unit and compressor are sequentially connected, and the compressor connects produced gas
Pipeline forms natural gas circulation line.
3. a kind of natural gas for combustible ice pilot production process as claimed in claim 1 is quickly formed and stored on-site system,
It is characterized in that, the water circulation unit includes:Water tank, water pump, surge tank, cyclone separator and circulating pump;
Extraction water pipeline, water tank, water pump, hydrate generation unit, surge tank, cyclone separator and circulating pump are sequentially connected,
The circulating pump connection extraction water pipeline forms water circulation pipe.
4. a kind of natural gas for combustible ice pilot production process as claimed in claim 3 is quickly formed and stored on-site system,
It is characterized in that, the surge tank, water tank and circulating pump connect surge tank cooling device, water tank cooling device and follow respectively
Ring pump refrigerating device.
5. a kind of natural gas for combustible ice pilot production process as claimed in claim 3 is quickly formed and stored on-site system,
It is characterized in that, be respectively equipped with agitating device and bubbling device inside the water tank, the bubbling device is by a small amount of produced gas
Blast in water tank, the dissolving of promoting the circulation of qi body and the formation of hydrate nucleus are mixed into by the agitating device and recovered water.
6. a kind of natural gas for combustible ice pilot production process as claimed in claim 3 is quickly formed and stored on-site system,
It is characterized in that, add accelerating agent in the water tank.
7. a kind of natural gas for combustible ice pilot production process as claimed in claim 1 is quickly formed and stored on-site system,
It is characterized in that, the hydrate conveying and storage unit include:Throttling heat sink and hydrate the compacting dress of interconnection
Put;
The hydrate of generation is collectively forming hydrate slurry with unreacted water in hydrate generation unit in hydrate generation unit,
The hydrate slurry is compacted into bulk after the heat sink that throttles into hydrate pressure type device, and in combustible ice pilot production platform
Upper completion stored on-site.
8. a kind of natural gas for combustible ice pilot production process as claimed in claim 7 is quickly formed and stored on-site system,
It is characterized in that, the volume fraction of the unreacted recovered water in the hydrate slurry is not more than a%, a is setting value.
9. a kind of natural gas for combustible ice pilot production process as claimed in claim 1 is quickly formed and stored on-site system,
It is characterized in that, the hypergravity cyclone is connected with hypergravity cyclone cooling device.
10. a kind of natural gas for combustible ice pilot production process as claimed in claim 1 is quickly formed and stored on-site system,
It is characterized in that, gas inlet tube of the produced gas of combustible ice pilot production process above hypergravity cyclone tangentially enters at a high speed simultaneously
Forming centrifugal hypergravity field, the liquid inlet tube of the recovered water of combustible ice pilot production process above hypergravity cyclone enters, and
Sprayed by the gas-liquid distributor above hypergravity cyclone and under.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111120869A (en) * | 2020-01-10 | 2020-05-08 | 兰州理工大学 | Biological natural gas storage and use system and storage and use method |
CN114933924A (en) * | 2022-06-27 | 2022-08-23 | 中海石油(中国)有限公司 | System and method for quickly generating associated gas hydrate by supergravity method |
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CN1429896A (en) * | 2001-12-29 | 2003-07-16 | 中国科学院广州能源研究所 | Method and equipment for preparing natural gas hydrate |
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