CN106761657A - A kind of multistage natural gas gas-liquid separation device and method under water - Google Patents

A kind of multistage natural gas gas-liquid separation device and method under water Download PDF

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Publication number
CN106761657A
CN106761657A CN201710137273.4A CN201710137273A CN106761657A CN 106761657 A CN106761657 A CN 106761657A CN 201710137273 A CN201710137273 A CN 201710137273A CN 106761657 A CN106761657 A CN 106761657A
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CN
China
Prior art keywords
separation device
core pipe
eddy flow
gas
discharge opeing
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CN201710137273.4A
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Chinese (zh)
Inventor
刘永飞
李清平
姚海元
庞维新
程兵
秦蕊
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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Priority to CN201710137273.4A priority Critical patent/CN106761657A/en
Publication of CN106761657A publication Critical patent/CN106761657A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34—Arrangements for separating materials produced by the well
    • E21B43/36—Underwater separating arrangements

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Separating Particles In Gases By Inertia (AREA)

Abstract

The invention discloses a kind of multistage natural gas gas-liquid separation device and method under water, it includes the first stage separation device, second-stage separation device and the third level separator that are sequentially connected in series from the bottom to top:First stage separation device includes horizontally disposed tank body, is arranged at the air flap near tank body air inlet, the spiral case separative element for being arranged at the coalescence silk screen at air flap rear and being arranged at tank body gas outlet;Second-stage separation device includes the eddy flow core pipe being connected with tank body gas outlet, the multiple eddy flow mechanisms being arranged inside eddy flow core pipe and the first discharge opeing sleeve pipe being set in outside eddy flow core pipe;The first discharge opeing latasuture is offered on the eddy flow core pipe bottom tube wall on rear side of eddy flow mechanism each described;Third level separator include with the eddy flow core pipe coalescence core pipe that be connected of outlet, be arranged at catching mist silk screen and be set in the second discharge opeing of the outside sleeve pipe for coalescing core pipe inside coalescence core pipe;Multiple second discharge opeing latasutures are also opened up on the bottom tube wall of coalescence core pipe.

Description

A kind of multistage natural gas gas-liquid separation device and method under water
Technical field
The present invention relates to a kind of natural gas gas-liquid separation equipment and method, more particularly to a kind of multistage natural gas gas-liquid under water Separator and method.
Background technology
With advances in technology and international community is to the demand of natural gas energy resource, the construction of natural gas fields by land under water, By shallow water to deep water.The construction of natural gas fields is generally accompanied by NGL and water, and NGL and water are in natural gas Can cause to flow security risk, the particularly conveying of long range tieback or standpipe tieback deep water platform in course of conveying.For producing The less gas field of water, can be by injecting the hydrate inhibitors such as ethylene glycol under water, and being then delivered to platform carries out natural gas gas Liquid separating treatment;For High water cut gas field, not only hydrate inhibitor demand is big, costly, but also can greatly increase conveying Pressure, causes pressure to produce to the flow production in gas field, and shut-in pressure is high or even cannot the adverse effect such as flow production.Therefore, for High water cut gas field needs to be separated under water.Gas production and the gas liquid ratio meeting during Development and Production of deep water natural gas field Constantly fluctuation, and degree of fluctuation is than larger, and conventional separator is difficult in the whole life cycle of natural gas field exploitation It is attained by efficiently separating.
Currently, some separators are separated suitable for containing large amount of liquid, will there is separative efficiency in the case where liquid phase is fewer Low problem;Some problems are efficiently separated suitable for low operating mode containing liquid, and often there is liquid phase in the case where liquid phase is relatively more breaks It is broken, entrainment the problems such as, so as to cause separative efficiency low.
The content of the invention
Regarding to the issue above, natural gas can be realized in different operating modes containing liquid it is an object of the invention to provide a kind of The gas of multistage natural under water gas-liquid separation device and method that gas liquid high-efficiency is separate.
To achieve the above object, the present invention uses following technical scheme:A kind of multistage natural gas gas-liquid separation device under water, Characterized in that, it includes that the first stage separation device, second-stage separation device and the third level that are sequentially connected in series from the bottom to top separate Device:The first stage separation device includes horizontally disposed tank body, is arranged at the air flap near the tank body air inlet, The spiral case separative element for being arranged at the coalescence silk screen at the air flap rear and being arranged at the tank body gas outlet;It is described Second-stage separation device includes the eddy flow core pipe being connected with the tank body gas outlet, is arranged at the multiple inside the eddy flow core pipe Eddy flow mechanism and the first discharge opeing sleeve pipe being set in outside the eddy flow core pipe;On rear side of eddy flow mechanism each described The first discharge opeing latasuture is offered on the eddy flow core pipe bottom tube wall;The third level separator includes and the eddy flow core The coalescence core pipe of pipe outlet connection, is arranged at catching mist silk screen and be set in the coalescence core pipe inside the coalescence core pipe Outside second discharge opeing sleeve pipe;Multiple second discharge opeing latasutures are also opened up on the bottom tube wall of the coalescence core pipe.
The bottom of the tank body, the first discharge opeing sleeve pipe and the second discharge opeing sleeve pipe is provided with draining pipe.
The coalescence silk screen is arranged in the tank body upper inside walls at the air flap rear, and the coalescence Silk screen bottom does not contact with the tank base.
Multiple eddy flow mechanisms arrange in the inside of the eddy flow core pipe along the axis spaced series of the eddy flow core pipe.
Multiple second-stage separation devices in parallel above the first stage separation device, each second level separates Third level separator described in device correspondence series connection one, in each second-stage separation device and each third level separator Porch set control valve.
The tank body uses pressure container cylinder.
The eddy flow mechanism include deflection cone and along the deflection cone middle part of sliding channel circumferencial direction it is uniform make vane piece.
Present invention also offers a kind of separation method based on multistage natural gas gas-liquid separation device under water, including following step Suddenly:
1) gas field natural gas containing liquid first passes around first stage separation device and carries out gas-liquid separation under water;Natural gas containing liquid enters Tank body, the most of liquid containing liquid natural gas condenses into drop after inlet baffle is encountered and is separated under gravity, Then by coalescence silk screen, liquid in air-flow is agglomerated into big drop to air-flow in silk screen is coalesced, under gravity directly from Coalesced filament is dripped on the net, and air-flow goes successively to spiral case separative element, and under the influence of centrifugal force, Partial Liquid Phase is separated, The liquid phase isolated in first stage separation device is discharged through draining pipe;
2) through step 1) air-flow after treatment enters second-stage separation device, and air-flow is along the flowing of eddy flow core pipe successively by one The eddy flow mechanism of the series connection of fixed number amount, vane piece is made, droplet is thrown to eddy flow core pipe side wall under the influence of centrifugal force, and The first discharge opeing sleeve pipe is discharged to along the first discharge opeing latasuture in the side wall of eddy flow core pipe, the liquid phase for separating is arranged through draining pipe Go out;
3) through step 2) treatment after air-flow enter third level separator, air-flow along coalescence core pipe flowing through catching mist silk Net, the liquid phase in air-flow encounter catch mist silk screen after can constantly coalesce, droplet constantly gathers into big drop, and big drop is in gravity Dripped under effect, the second discharge opeing sleeve pipe be discharged to then along the second discharge opeing latasuture, the liquid phase for separating is discharged through draining pipe, Natural gas after being separated through three-level discharges transfer through the outlet of coalescence core pipe.
The present invention uses above technical scheme, and it has the following advantages that:1st, the present invention by the first separator, second point It is sequentially connected in series from top to bottom from device and the 3rd separator, it is not at the same level suitable for the different operating modes of natural gas containing liquid, Neng Gouzhen Gas liquid high-efficiency is separated can be realized to different operating modes containing liquid.2nd, in second-stage separation device, multiple eddy flow mechanisms exist the present invention Successively along the axis direction interval setting of eddy flow core pipe in eddy flow core pipe, natural gas containing liquid can be realized in second-stage separation device It is middle through multiple gas-liquid centrifugation, put forward the gas-liquid separation efficiency of containing large amount of liquid natural gas.3rd, the present invention passes through first stage separation device Top multiple second-stage separation device in parallel, one third level separator of each second-stage separation device series connection, in the second fraction Control valve is set from the porch of device and third level separator, can be controlled according to the gas production in gas field in running order Second-stage separation device and third level separator number, ensure that the efficient of in each separator gas-liquid separation Property simultaneously put forward containing large amount of liquid natural gas processing amount.4th, tank body of the invention uses pressure container cylinder, ensure that the pressure-bearing of tank body Ability, it is ensured that the safe handling of whole device.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention;
Fig. 2 is the structural representation of eddy flow mechanism of the invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
As shown in figure 1, according to the gas gas-liquid separation device of multistage natural under water proposed by the present invention, it is separated including the first order Device 1, second-stage separation device 2 and third level separator 3, first stage separation device 1, second-stage separation device 2 and the 3rd Level separator 3 is sequentially connected in series from top to bottom.
Wherein, first stage separation device 1 includes tank body 11, air flap 12, coalescence silk screen 13 and spiral case separative element 14, Tank body 11 is horizontally disposed with, and its one end top has air inlet, and other end top has gas outlet, and air flap 12 is arranged on tank body In 11 and near the air inlet of tank body 11.Coalescence silk screen 13 is arranged in the upper inside walls of tank body 11 at the rear of air flap 12 On, and coalescence the bottom of silk screen 13 do not contacted with tank body 11.Spiral case separative element 14 is also arranged in tank body 11 and positioned at tank body 11 Gas outlet at, the bottom of tank body 11 connection discharge opeing common excretory duct 4.
Second-stage separation device 2 includes eddy flow core pipe 21, eddy flow mechanism 22 and discharge opeing sleeve pipe 23, the entrance of eddy flow core pipe 21 Connect the gas outlet of tank body 11, the inside of eddy flow core pipe 21 along eddy flow core pipe 21 axis spaced series multiple eddy flow mechanisms 22, offer discharge opeing latasuture 211 on the bottom tube wall of eddy flow core pipe 21 positioned at each rear side of eddy flow mechanism 22.Discharge opeing sleeve pipe 23 outsides for being set in eddy flow core pipe 21, the bottom of discharge opeing sleeve pipe 23 is provided with for connecting discharge opeing sleeve pipe 23 and discharge opeing common excretory duct 4 the first draining pipe 24.
Third level separator 3 includes coalescence core pipe 31, catches mist silk screen 32 and discharge opeing sleeve pipe 33, coalesces the entrance of core pipe 31 Outlet with eddy flow core pipe 21 is connected, and coalesces outlet and the external connection of core pipe 31.Set in the inside of coalescence core pipe 31 and catch mist Silk screen 32, multiple discharge opeing latasutures 311 are opened up on the bottom tube wall of coalescence core pipe 31.Discharge opeing sleeve pipe 33 is set in coalescence core pipe 31 Outside, the bottom of discharge opeing sleeve pipe 33 is provided with the second draining pipe 34 for connecting discharge opeing sleeve pipe 33 and discharge opeing common excretory duct 4.
It is possible to further in the top of first stage separation device 1 multiple second-stage separation device 2 in parallel, each second level Correspondence one third level separator 3 of series connection of separator 2, in each second-stage separation device 2 and each third level separator 3 Porch set control valve 5.
Further, it is the underwater pressure-bearing ability of guarantee tank body 11, tank body 11 is pressure container cylinder.
Further, as shown in Fig. 2 eddy flow mechanism 22 includes deflection cone a and the middle part of sliding channel circumferencial direction along deflection cone a Uniform makes vane piece b.
Based on the multistage natural gas gas-liquid separation device provided in above-described embodiment, present invention also offers a kind of many under water Level natural gas gas-liquid separating method, comprises the following steps:
1) gas field natural gas containing liquid first passes around first stage separation device 1 and carries out gas-liquid separation under water;Natural gas containing liquid enters Enter tank body 11, the most of liquid containing liquid natural gas condenses into drop after inlet baffle 12 is encountered and separated under gravity Get off, then by coalescence silk screen 13, the liquid in air-flow is agglomerated into big drop to air-flow in silk screen 13 is coalesced, in Action of Gravity Field Lower directly to be dripped from coalescence silk screen 13, air-flow goes successively to spiral case separative element 14, under the influence of centrifugal force, Partial Liquid Phase Separated, the liquid phase isolated in first stage separation device 1 is discharged to discharge opeing common excretory duct 4;
2) through step 1) air-flow after treatment enters second-stage separation device 2, and air-flow passes through after flowing elder generation along eddy flow core pipe 21 The eddy flow mechanism 22 of a number of series connection is crossed, droplet is thrown to eddy flow core pipe under the influence of centrifugal force vane piece a is made 21 side walls, and discharge opeing sleeve pipe 23 is discharged to along the discharge opeing latasuture 211 in the side wall of eddy flow core pipe 21, the liquid phase for separating is through One draining pipe 24 is discharged to discharge opeing common excretory duct 4;
3) through step 2) air-flow after treatment enters third level separator 3, and air-flow is along the coalescence flowing of core pipe 31 by catching Mist silk screen 32, the liquid phase in air-flow encounter catch mist silk screen 32 after can constantly coalesce, droplet constantly gathers into big drop, big liquid Drop is dripped under gravity, discharge opeing sleeve pipe 33 is discharged to then along discharge opeing latasuture 311, through the row of being pooled to of the second draining pipe 34 Liquid common excretory duct 4, the natural gas after being separated through three-level discharges transfer through the outlet of coalescence core pipe 31.
The present invention is only illustrated with above-described embodiment, and the structure of each part, set location and its connection all can be have Changed.On the basis of technical solution of the present invention, all improvement carried out to individual part according to the principle of the invention or equivalent Conversion, should not exclude outside protection scope of the present invention.

Claims (8)

1. one kind multistage natural gas gas-liquid separation device under water, it is characterised in that it includes be sequentially connected in series from the bottom to top first Level separator, second-stage separation device and third level separator:
The first stage separation device includes horizontally disposed tank body, is arranged at the air flap near the tank body air inlet, The spiral case separative element for being arranged at the coalescence silk screen at the air flap rear and being arranged at the tank body gas outlet;
The second-stage separation device includes the eddy flow core pipe being connected with the tank body gas outlet, is arranged in the eddy flow core pipe Multiple eddy flow mechanisms in portion and the first discharge opeing sleeve pipe being set in outside the eddy flow core pipe;Positioned at eddy flow machine each described The first discharge opeing latasuture is offered on the eddy flow core pipe bottom tube wall on rear side of structure;
The third level separator includes the coalescence core pipe being connected with eddy flow core pipe outlet, is arranged at the coalescence core pipe It is internal to catch mist silk screen and be set in the second discharge opeing of outside sleeve pipe of the coalescence core pipe;In the lower tube of the coalescence core pipe Also multiple second discharge opeing latasutures are opened up on wall.
2. multistage natural gas gas-liquid separation device under water as claimed in claim 1 a kind of, it is characterised in that:The tank body, The bottom of one discharge opeing sleeve pipe and the second discharge opeing sleeve pipe is provided with draining pipe.
3. multistage natural gas gas-liquid separation device under water as claimed in claim 1 a kind of, it is characterised in that:The coalescence silk screen It is arranged in the tank body upper inside walls at the air flap rear, and the coalesced filament net bottom end and the tank body bottom Portion does not contact.
4. multistage natural gas gas-liquid separation device under water as claimed in claim 1 a kind of, it is characterised in that:Multiple eddy flows Mechanism arranges in the inside of the eddy flow core pipe along the axis spaced series of the eddy flow core pipe.
5. a kind of multistage natural gas gas-liquid separation device under water as claimed in claim 1 or 2 or 3 or 4, it is characterised in that: First stage separation device top multiple second-stage separation devices in parallel, each second-stage separation device correspondence is gone here and there Third level separator described in connection one, sets in the porch of each second-stage separation device and each third level separator Put control valve.
6. a kind of multistage natural gas gas-liquid separation device under water as described in claim 1 or 2 or 3, it is characterised in that:The tank Body uses pressure container cylinder.
7. a kind of multistage natural gas gas-liquid separation device under water as described in claim 1 or 4, it is characterised in that:The eddy flow Mechanism include deflection cone and along the deflection cone middle part of sliding channel circumferencial direction it is uniform make vane piece.
8. a kind of gas gas-liquid separating method of multistage natural under water based on claim 2 to 7 any one described device, including it is following Step:
1) gas field natural gas containing liquid first passes around first stage separation device and carries out gas-liquid separation under water;Natural gas containing liquid enters tank Body, the most of liquid containing liquid natural gas condenses into drop after inlet baffle is encountered and is separated under gravity, so By coalescence silk screen, liquid in air-flow is agglomerated into big drop to air-flow in silk screen is coalesced afterwards, under gravity directly from poly- Dripped on knot silk screen, air-flow goes successively to spiral case separative element, and under the influence of centrifugal force, Partial Liquid Phase is separated, The liquid phase isolated in first stage separation device is discharged through draining pipe;
2) through step 1) air-flow after treatment enters second-stage separation device, and air-flow is along the flowing of eddy flow core pipe successively by a fixed number The eddy flow mechanism of the series connection of amount, vane piece is made, droplet is thrown to eddy flow core pipe side wall under the influence of centrifugal force, and along The first discharge opeing latasuture in the side wall of eddy flow core pipe is discharged to the first discharge opeing sleeve pipe, and the liquid phase for separating is discharged through draining pipe;
3) through step 2) air-flow after treatment enters third level separator, air-flow along coalescence core pipe flowing by catching mist silk screen, Liquid phase in air-flow encounter catch mist silk screen after can constantly coalesce, droplet constantly gathers into big drop, and big drop is made in gravity Dripped under, the second discharge opeing sleeve pipe is discharged to then along the second discharge opeing latasuture, the liquid phase for separating is discharged through draining pipe, warp Natural gas after three-level is separated discharges transfer through the outlet of coalescence core pipe.
CN201710137273.4A 2017-03-09 2017-03-09 A kind of multistage natural gas gas-liquid separation device and method under water Pending CN106761657A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515202A (en) * 1944-11-06 1950-07-18 Heyward J Dyer Gas and liquid separator
CN202238348U (en) * 2011-04-13 2012-05-30 中国石油大学(华东) A multi-tubular cyclone separator for natural gas purification
CN102732296A (en) * 2012-07-26 2012-10-17 中国海洋石油总公司 High water-content crude oil electrostatic dehydration device
CN202610203U (en) * 2011-12-21 2012-12-19 中国石油大学(华东) Combined type rotational flow coalescer for offshore platform natural gas purification
CN203530264U (en) * 2013-09-24 2014-04-09 中国石油大学(华东) Three-level natural gas separator
CN206545504U (en) * 2017-03-09 2017-10-10 中国海洋石油总公司 A kind of multistage natural gas gas-liquid separation device under water

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515202A (en) * 1944-11-06 1950-07-18 Heyward J Dyer Gas and liquid separator
CN202238348U (en) * 2011-04-13 2012-05-30 中国石油大学(华东) A multi-tubular cyclone separator for natural gas purification
CN202610203U (en) * 2011-12-21 2012-12-19 中国石油大学(华东) Combined type rotational flow coalescer for offshore platform natural gas purification
CN102732296A (en) * 2012-07-26 2012-10-17 中国海洋石油总公司 High water-content crude oil electrostatic dehydration device
CN203530264U (en) * 2013-09-24 2014-04-09 中国石油大学(华东) Three-level natural gas separator
CN206545504U (en) * 2017-03-09 2017-10-10 中国海洋石油总公司 A kind of multistage natural gas gas-liquid separation device under water

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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No.

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Application publication date: 20170531