CN109488262A - A kind of exploitation of gas hydrates silt cyclone separator - Google Patents
A kind of exploitation of gas hydrates silt cyclone separator Download PDFInfo
- Publication number
- CN109488262A CN109488262A CN201910052405.2A CN201910052405A CN109488262A CN 109488262 A CN109488262 A CN 109488262A CN 201910052405 A CN201910052405 A CN 201910052405A CN 109488262 A CN109488262 A CN 109488262A
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- Prior art keywords
- tie
- exploitation
- gas hydrates
- wall
- cyclone separator
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Classifications
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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
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/36—Underwater separating arrangements
Abstract
The present invention discloses a kind of exploitation of gas hydrates silt cyclone separator, separator body includes cylindrical tube and conical shell, it is equipped with overflow port at the top of the cylindrical tube, is equipped with feed inlet on side wall, underflow opening is equipped in conical shell bottom, a tie is longitudinally equipped with inside separator body and at separator axle center, it is fixedly connected by fixing bracket on tie with cylindrical tube at the top of tie, tie bottom end is fixedly connected by fixing bracket under tie with conical shell.The cyclone separator arrangement is simple, easy for installation, processing cost is low, use scope is wide, separative efficiency is high, suitable for the silt separation during exploitation of gas hydrates；Twisted tape inserts enhance rotational flow intensity inside, help realization secondary separation；The flow stability in inward eddy area is improved, and is conducive to system safety operation；Twisted strip is moved out zero flow velocity envelope, advantageously reduces hydrate loss；Flowing hole provides channel for center gas floating, avoids operation troubles caused by vapour lock.
Description
Technical field
The invention belongs to mixture separation technology fields in sea bed gas hydrate recovery process, and in particular to Yi Zhongyong
In the silt separation equipment of sea bed gas hydrate fluidization exploitation, it can also be used to the purification of other pipeline Complex Flows systems
With separate.
Background technique
Gas hydrates are as a kind of novel clean energy resource, and in polar region, permafrost, marine deposits and extra large land are connect
It is abundant that hiding is all assigned at earth.Under equal conditions, the carbon content of the gas hydrates of same volume is significantly larger than other fossil energy
The carbon content in source, thus gas hydrates as the new cleaning fuel of future alternative fossil energy a kind of and it is each by the world
State is of interest.
But due to the physical characteristic of gas hydrates unique occurrence condition and its own, so that natural gas is hydrated
The recovery process of object is extremely difficult, so the relation technological researching and equipment of exploitation and recovery process to gas hydrates
Exploitation is just particularly important.
The reservoir of South Sea Shenhu sea area gas hydrates is mainly the fine-grained sediments hydrates such as flour sand, shale flour sand,
Such hydrate solids poor permeability and stock number accounts for 95% or more is used for China's South China Sea hydrate resources characteristic
It is effective method (Zhou Shouwei, Chen Wei, Li Qing that seabed superficial surface layer hydrate solid state fluidizing production technique, which carries out exploitation,
It is flat.Deep water shallow layer gas hydrate solid state fluidizing Green Mining Technology [J] China offshore oil and gas, 2014,26 (05): 1-7).
Seabed superficial surface layer hydrate solid state fluidizing production technique is hydrate under bottom-water temperature and the opposite stable condition of pressure, is utilized
Extractive equipment develops hydrate ore body in solid form, after the deposit containing hydrate is ground into fine particle, by seawater
It is mixed with deposit, silt is separated using underwater eddy flow sand separation technology in pumping front end.Reducing seabed hoisting system
While power consumption, effective transfer efficiency is improved, increases the natural decomposition amount of hydrate in lifting process.
Hydrocyclone is applied relatively broad in the industry, can be used for liquid-solid, liquid-liquid, gas-particle separation.Working principle is
Centrifugal sedimentation, specifically mixture passes through inlet tube under pressure and enters in shell along cylinder tangential direction, in shell
Do rotary motion.The biggish particle of density in mixture is because entered the periphery of rotary current by biggish centrifugal force, and downwards
Flowing, is then discharged by the underflow opening of cyclone bottom, and sand setting is formed.Fine particle is compared due to the centrifugal force being subject to
It is small, it can be moved upwards with liquid flow, flow out to form overflow eventually by overflow pipe.
In progress exploitation of gas hydrates, separation process, since change of external conditions leads to a certain amount of hydrate
Gas is resolved into, becomes fluidised hydrate slurry and is flowed by silt, hydrate, natural gas, the complicated of four phase composition of seawater
Kinety system, vapour lock easy to form.Therefore key technical problem to be solved is in hydrate exploitation silt separation process: (1)
Improve silt separative efficiency；(2) reduce gas hydrates loss；(3) natural gas is avoided to form vapour lock in separator.And show
Some hydrocyclones are unable to satisfy above-mentioned requirements.
Summary of the invention
It is unable to satisfy during underwater exploitation of gas hydrates for hydrocyclone existing in the prior art
Efficiently separate the requirement of silt, the present invention proposes that a kind of structure is simple, good separating effect, easy for installation, compact, low energy consumption
And adapt to underwater long-term running exploitation of gas hydrates silt cyclone separator.
The technical solution of the present invention is as follows: a kind of exploitation of gas hydrates silt cyclone separator, cyclone separator ontology
The conical shell of cylindrical tube and lower section including top is equipped with overflow port at the top of the cylindrical tube, is equipped with feed inlet on side wall,
It is equipped with underflow opening in conical shell bottom, is longitudinally equipped with a tie inside separator body and at separator axle center,
The top of the tie is fixedly connected by fixing bracket on tie with the bottom sidewall of cylindrical tube, and the bottom end of the tie is logical
It crosses under tie and fixes bracket and be fixedly connected with the bottom sidewall of conical shell.
Further, uniformly distributed two flowing holes in each twisted strip pitch length of tie, overcurrent bore dia d are 7-15
Mm, the twisted strip length are 200-600 mm, and width is 15-45 mm, and torsion rate is 2.5-5.
Further, the twisted strip bottom end is away from 45 mm of underflow opening.
Further, the overcurrent bore dia is 5-10 mm.
Further, circular frame that bracket includes middle part is fixed on the tie and equidistant point of circular frame outer wall ring week
Three connection straps of cloth, the tie top are fixedly connected with circular frame inner wall, the outboard end and cylindrical drum of the connection strap
Internal wall is fixedly connected；The circular frame two and equidistant in two outer wall ring week of circular frame that bracket includes middle part is fixed under the tie
Three connection straps two of distribution, the tie bottom end are fixedly connected with two inner wall of circular frame, the outboard end of the connection strap two
It is fixedly connected with conical shell inner wall.
The beneficial effects of the present invention are:
1. the present invention discloses a kind of exploitation of gas hydrates silt cyclone separator, inward eddy is enhanced by twisted tape inserts
Intensity, mixture fluid get rid of silt during flowing up again to wall surface, realize secondary separation；
2. to be improved in the flow stability in inward eddy area by the way that tie is arranged, be conducive to system safety operation.Twisted strip
It is moved out zero flow velocity envelope, advantageously reduces hydrate loss；
3. the flowing hole on twisted strip provides channel for center gas floating, operation troubles caused by vapour lock is avoided；
4. the configuration of the present invention is simple, easy for installation, processing cost is low, use scope is wide, separative efficiency is high, it is suitable for natural gas
Hydrate exploits silt separation.
Detailed description of the invention
Fig. 1 is a kind of overall structure diagram of exploitation of gas hydrates silt cyclone separator disclosed by the invention；
Fig. 2 is a kind of schematic top plan view of exploitation of gas hydrates silt cyclone separator disclosed by the invention；
Fig. 3 is the structural schematic diagram of tie disclosed by the invention；
Fig. 4 is support bracket fastened structural schematic diagram on tie disclosed by the invention；
Fig. 5 is support bracket fastened structural schematic diagram under tie disclosed by the invention；
Fig. 6 is that whether there is or not the statistical forms that flowing hole influences pressure drop on tie made from the embodiment of the present invention 2；
Fig. 7 is that whether there is or not the comparison statistical forms that tie influences separative efficiency in cyclone separator made from the embodiment of the present invention 3.
Wherein, 1- overflow port, 2- feed inlet, 3- cylindrical tube fix bracket on 4- twisted strip, the tapered cylinder of 5-, 6- twisted strip,
7- flowing hole fixes bracket, 9- underflow opening under 8- twisted strip.
Specific embodiment
Following embodiment further illustrates the contents of the present invention, but should not be construed as limiting the invention.Without departing substantially from
In the case where essence of the present invention, to modification made by the method for the present invention, step or condition and replaces, belong to model of the invention
It encloses.
Embodiment 1
In order to promote the silt separative efficiency in natural gas hydrate recovery process, reducing the loss of gas hydrates and avoid day
Right gas forms vapour lock in separator, and the present embodiment discloses a kind of exploitation of gas hydrates silt cyclone separator, specific machine
Structure is detailed in Fig. 1-5, and cyclone separator ontology includes the cylindrical tube 3 of top and the conical shell 5 of lower section, wherein cylindrical tube
High 285 mm, barrel diameter are 250 mm, and high 463 mm of conical shell, cone angle are 15 °, and overflow is equipped at the top of cylindrical tube 3
Mouth 1, side wall are equipped with feed inlet 2, and overflow diameter is 70 mm, overflow pipe total length is 85 mm, wherein protrudes into cylindrical tube 3
Interior depth is 65 mm, and intake port is 40 mm, and length is 50 mm；Underflow opening 9, underflow are equipped in 5 bottom of conical shell
Mouth diameter is 30mm；
It is longitudinally equipped with a tie 6 inside separator body and at separator axle center, the top of the tie 6 passes through knob
It takes fixed bracket 4 to be fixedly connected with the bottom inside wall of cylindrical tube 3, the bottom end of the tie 6 passes through branch fixed under tie
Frame 8 is fixedly connected with the bottom inside wall of conical shell 5；The circular frame of bracket 4 including middle part is fixed on the tie and in circle
Three connection straps that shape outer frame wall ring week equidistantly distributes, 6 top of tie are fixedly connected with circular frame inner wall, the company
The outboard end of narrow bars is fixedly connected with 3 inner wall of cylindrical tube；Fixed under the tie bracket 8 including middle part circular frame two and
Three connection straps two that two outer wall ring week of circular frame equidistantly distributes, 6 bottom end of tie and two inner wall of circular frame are fixed to be connected
It connects, the outboard end of the connection strap two is fixedly connected with 5 inner wall of conical shell.
Increase to reduce resistance caused by tie is placed, enhancing gas circulation, in each twisted strip pitch length of tie 6
It is upper to be evenly distributed with two flowing holes 7,8 flowing holes 7 are opened up on the tie in separator disclosed in the present embodiment altogether, flowing hole 7 is straight
Diameter d is 10 mm, and 6 length of twisted strip is 500 mm, width is 25 mm, torsion rate is that 5(torsion rate calculation formula Y=H/D, H are
Twisted strip screw pitch, D are twisted strip outer diameter)；Distance of 6 bottom end of twisted strip away from underflow opening 9 is 15 mm.
Specific operating principle are as follows: gas hydrates silt particle mixture slurry enters separator by feed inlet 2, in cylindrical drum
Swirling motion is done in the separator body that body 3 and conical shell 5 form.Due to the effect of centrifugal force, by gas hydrates mud
Sand mixture slurry is centrifuged, heavy constituent and light component material of different sizes, eddy flow of generation due to centrifugal force
Range is also different, is broadly divided into inward eddy area and contour stealth area, the contour stealth region is near separator barrel, heavy constituent
Material got rid of near wall region to cylindrical tube 3 and tapered cylinder 5, such as silt particle assembles contour stealth region, by gravity
Sedimentation is discharged from underflow opening 9.
The gas that the material of light component such as hydrate particle and gas hydrate dissociation go out concentrates on the inward turning at axle center
Area to be flowed, is discharged from overflow port 1, heart near axis, inward eddy are generated by twisted tape inserts 6 in the separator in the inward eddy region,
Under interior cyclonic action, hydrate, water, gas are gathered in inward eddy area.
The present invention enhances rotational flow intensity inside by twisted tape inserts 6, and mixture fluid is during flowing up by silt
It is got rid of again to wall surface, realizes secondary separation；The flow stability in inward eddy area is improved, and twisted strip keeps zero flow velocity envelope outside
It moves, advantageously reduces hydrate loss.
Embodiment 2
In order to illustrate the flowing hole on the twisted strip in exploitation of gas hydrates silt cyclone separator disclosed in embodiment 1 for
The influence of resistance variation, the present embodiment have done separator pressure-drop experiment under different flow.It as a result as shown in fig. 6, can from figure
To find out, in given range of flow, without flowing hole than there is the separator pressure-drop of flowing hole to be averagely higher by 9.5% or so on twisted strip.
Embodiment 3
Separative efficiency and the conventional hydrocyclone separation efficiency comparative of cyclone separator disclosed in embodiment 1 is shown in Fig. 7
As a result.
Experiment condition is that silt particle partial size is 60 μm, and silt density is 2600 kg/m3, incipient sediment volume content is 13%；
Hydrate volume content is 35%, and hydrate partial size is 60 μm, and hydrate density is 860 kg/m3, natural gas volume content is
5%；Water volume content 47%.
It can be seen from figure 7 that within the scope of given mixture flow rate, cyclone separator average mark disclosed in embodiment 1
6% or so are improved than conventional hydrocyclone separative efficiency from efficiency, when flow is 64 m3When/h, separative efficiency highest is improved
7%.
Basic principles and main features and advantage of the invention have been shown and described above.But the foregoing is merely this hairs
Bright specific embodiment, technical characteristic of the invention are not limited thereto, and any those skilled in the art is not departing from this hair
The other embodiments obtained under bright technical solution should all cover within the scope of the patent of the present invention.
Claims (5)
1. a kind of exploitation of gas hydrates silt cyclone separator, which is characterized in that separator body includes the cylinder of top
The conical shell (5) of cylinder (3) and lower section is equipped with overflow port (1) at the top of the cylindrical tube (3), is equipped with feed inlet on side wall
(2), underflow opening (9) are equipped in conical shell (5) bottom, are longitudinally equipped with inside separator body and at separator axle center
The top of one tie (6), the tie (6) is solid by the bottom inside wall for fixing bracket (4) and cylindrical tube (3) on tie
The bottom end of fixed connection, the tie (6) connects by the way that the bottom inside wall for fixing bracket (8) and conical shell (5) under tie is fixed
It connects.
2. a kind of exploitation of gas hydrates silt cyclone separator as described in claim 1, which is characterized in that in tie
(6) uniformly distributed two flowing holes (7) in each twisted strip pitch length, flowing hole (7) diameter are 7-15 mm, the twisted strip (6)
Length is 200-600 mm, width is 15-45 mm, torsion rate is 2.5-5.
3. a kind of exploitation of gas hydrates silt cyclone separator as described in claim 1, which is characterized in that the twisted strip
(6) distance of the bottom end away from underflow opening (9) is 45 mm.
4. a kind of exploitation of gas hydrates silt cyclone separator as described in claim 1, which is characterized in that the tie
Upper fixed bracket (4) includes the circular frame at middle part and three connection straps equidistantly distributing in circular frame outer wall ring week, the knob
Band (6) top is fixedly connected with circular frame inner wall, and the outboard end of the connection strap is fixedly connected with cylindrical tube (3) inner wall；
The circular frame two and three companies equidistantly distributed in two outer wall ring week of circular frame that bracket (8) includes middle part are fixed under the tie
Narrow bars two, tie (6) bottom end are fixedly connected with two inner wall of circular frame, the outboard end and conical shell of the connection strap two
(5) inner wall is fixedly connected.
5. a kind of exploitation of gas hydrates silt cyclone separator as claimed in claim 2, which is characterized in that the overcurrent
Hole (7) diameter is 5-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052405.2A CN109488262B (en) | 2019-01-21 | 2019-01-21 | Silt cyclone separator for natural gas hydrate exploitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052405.2A CN109488262B (en) | 2019-01-21 | 2019-01-21 | Silt cyclone separator for natural gas hydrate exploitation |
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| Publication Number | Publication Date |
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| CN109488262A true CN109488262A (en) | 2019-03-19 |
| CN109488262B CN109488262B (en) | 2021-10-08 |
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| CN114293968A (en) * | 2022-01-10 | 2022-04-08 | 西南石油大学 | Novel air-flotation rotational flow type natural gas hydrate desanding method and device |
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