KR101824396B1 - Separator for multiphase mixture - Google Patents

Separator for multiphase mixture Download PDF

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Publication number
KR101824396B1
KR101824396B1 KR1020160035170A KR20160035170A KR101824396B1 KR 101824396 B1 KR101824396 B1 KR 101824396B1 KR 1020160035170 A KR1020160035170 A KR 1020160035170A KR 20160035170 A KR20160035170 A KR 20160035170A KR 101824396 B1 KR101824396 B1 KR 101824396B1
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KR
South Korea
Prior art keywords
separation tank
oil
transfer line
polyphase mixture
gas
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Application number
KR1020160035170A
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Korean (ko)
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KR20170110860A (en
Inventor
김성우
이희웅
임효남
Original Assignee
삼성중공업 주식회사
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Priority to KR1020160035170A priority Critical patent/KR101824396B1/en
Publication of KR20170110860A publication Critical patent/KR20170110860A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/448—Floating hydrocarbon production vessels, e.g. Floating Production Storage and Offloading vessels [FPSO]

Abstract

A multiphasic mixture separation apparatus is disclosed. An apparatus for separating a polyphase mixture according to an embodiment of the present invention includes a separation tank into which a polyphase mixture flows and is separated into gas, oil and water by a specific gravity difference; A transfer line providing a passage for transferring the polyphase mixture to the separation tank, the transfer line having a vertical region extending vertically; And a branching line branched from the vertical region to provide a passage for moving the gas, which is dominantly distributed in the center of the passage of the vertical region of the polyphase mixture, to the separation tank.

Description

Separator for multiphase mixture [

The present invention relates to a multiphasic mixture separation apparatus.

With the rapid development of industries and industries internationally, the use of earth resources such as petroleum is gradually increasing, and thus the stable production and supply of crude oil is emerging as an important issue on a global scale.

For this reason, recently marginal field or deep-sea oil development has been economically feasible, which has been neglected due to economic difficulties so far. Therefore, with the development of submarine mining technology, drilling facilities suitable for the development of such oilfields A floating type of offshore structure has been developed.

In other words, conventional seabed drilling is mainly used for a rig ship or a rigid platform for underwater drilling, which is capable of navigating only by another tug ship, Recently, it has developed so-called Floating Production Storage Off-loading Vessels (FPSO), which is equipped with advanced drilling equipment and built in the same shape as a general ship so that it can navigate with its own power. It is used for drilling underwater.

Floating Crude Oil Production Storage and Handling Facility (FPSO) classifies and refines well fluids extracted from offshore plants and drillships to produce crude oil and store it to shuttle tankers Tanker or other special ship capable of being unloaded at the transfer site.

This floating crude oil production storage and unloading facility (FPSO) is composed of a lower hull structure (Hull) that functions as a storage facility and a topsides that produces and processes crude oil. Depending on storage capacity, Small size, between 100 and 1.5 million barrels, between 150 and 200 million barrels, and over 2 million barrels.

On the other hand, the floating oil production storage and unloading facility is equipped with a separating device for separating the drilled wells. An oil well jet mix is a multiphase mixture of water, oil, gas, and sand.

Such a separation apparatus separates the oil-gas mixture into an oil component and a water component by using the specific gravity difference. That is, the oil-in-water mixture supplied to the separation device is separated into oil component and water component in the interior of the separation tank over time, and the separated oil components are separated from each other by the difference in specific gravity with respect to the water component .

Such a separation apparatus increases the separation efficiency as the time for which the polyphase mixture stays in the separation tank becomes longer. Therefore, various technologies are being developed to increase the residence time.

An embodiment of the present invention is to provide a polyphase mixture separating apparatus in which a polyphase mixture is introduced into a separation tank in a state that a part thereof is separated before the polyphase mixture is introduced into a separation tank.

According to an aspect of the present invention, there is provided a separation tank comprising: a separation tank into which a polyphase mixture is introduced and separated into gas, oil and water by a specific gravity difference; A transfer line providing a passage for transferring the polyphase mixture to the separation tank, the transfer line having a vertical region extending vertically; And a branching line branching from the vertical region and providing a passage for moving gas, which is predominantly distributed in the center of the passage of the vertical region of the polyphase mixture, to the separation tank. Can be provided.

The transfer line may be connected to an area where the oil and the water separated in the separation tank are received.

The polyphase mixture separating apparatus may further include a mesh member disposed inside the separating tank so as to face a rear end of the transfer line.

The transfer line has a horizontal region extending horizontally at its rear end and the rear exit of the transfer line may be located on the boundary of the oil and the water separated in the separation tank.

The branch line may be connected to a region where the gas separated in the separation tank is accommodated.

The polyphase mixture separating apparatus may further include a collision member disposed inside the separating tank so as to face a rear end of the conveyance line.

According to the embodiment of the present invention, a part of the polyphase mixture flows into the separation tank in a state of being separated into a gas component and a liquid component before the polyphase mixture flows into the separation tank, thereby facilitating the separation of the polyphase mixture in the separation tank, Can be improved.

In another aspect, a part of the polyphase mixture before being introduced into the separation tank is previously separated, so that the size of the separation tank can be reduced, and the cost and the installation space can be minimized.

1 is a view showing a device for separating a polyphase mixture according to an embodiment of the present invention,
Fig. 2 is an enlarged view of the inside of part A in Fig. 1,
3 is a view showing a moving position and a speed of each component of a polyphase flow in a general vertical pipe,
4 is a view showing distribution of water and oil moving in a horizontal region of a transfer line according to an embodiment of the present invention,
5 is a view showing a part of a mesh member according to an embodiment of the present invention,
6 is an enlarged view of a collision member according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, do.

FIG. 1 is a view showing a device for separating a polyphase mixture according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the inside of part A of FIG. 1, the X-axis direction means the longitudinal direction of the separation tank 110, the Y-axis direction means the width direction of the separation tank 110, and the -X direction means the front of the separation tank 110 do.

1 and 2, the apparatus 100 for separating polyphase mixture includes a separation tank 110, a transfer line 140 and a branch line 150.

The polyphase mixture enters the separation tank (110). The polyphase mixture introduced into the separation tank 110 can be separated into gas, oil and water by the specific gravity difference.

For example, the polyphase mixture introduced into the separation tank 110 may be separated so that the water having a relatively large specific gravity is located below the water, the oil having the next largest specific gravity is placed thereon, and the gas having the small specific gravity is positioned at the top.

In the present embodiment, the polyphase mixture may be introduced into the separation tank 110 in a state where a part of the polyphase mixture is separated into a gaseous component and a liquid component. This will be described later.

The polyphase mixture may be an oil spill mixture ejected from a subsea well. In this case, the polyphase mixture may comprise water, oil, gas, sand, and the like.

The polyphase mixture flowing into the separation tank 110 moves in the longitudinal direction of the separation tank 110 and can be separated into gas, oil and water.

The oil separator 134 may be formed in the separation tank 110. The separated oil in the separation tank 110 may be discharged to the outside through the oil discharge portion 134.

The oil discharge portion 134 may be formed at a rear portion of the separation tank 110. It is preferable that the oil discharge portion 134 is located far away from the position where the polyphase mixture flows. In this case, the moving distance of the polyphase mixture flowing into the separating tank 110 is increased, so that the separation time can be increased.

The separation tank 110 may be provided with a gas discharge portion 136. The separated gas in the separation tank 110 may be discharged to the outside through the gas discharge portion 136. A mist extractor 137 may be installed at the tip of the gas discharge part 136. The gas in the separation tank 110 may be discharged through the gas discharge unit 136 in a state in which moisture is removed from the water extractor 137.

A water discharge portion 138 may be formed in the separation tank 110. The separated water in the separation tank 110 can be discharged to the outside through the water discharge portion 138.

The partitioning member 120 may be disposed inside the separating tank 110. The partitioning member 120 blocks water from flowing into the oil discharge portion 134.

1, the left side of the partitioning member 120 is referred to as a 'separation zone,' and the right side of the partitioning member 120 is referred to as a ' Oil field '.

The partition member 120 prevents water in the separation zone from entering the oil space. This partitioning member 120 can be formed higher than the water level in the separation zone.

When the polyphase mixture continuously flows into the separation tank 110, the amount of oil in the separation zone continuously increases, so that the oil in the separation zone can eventually flow into the oil zone beyond the partition member 120. The oil introduced into the oil space can be discharged to the outside through the oil discharge portion 134.

In this embodiment, the transfer line 140 provides a passage for transferring the polyphase mixture to the separation tank 110. The transfer line 140 may have a vertical region 141 extending vertically. The rear end of the transfer line 140 may be disposed inside the separation tank 110. The rear end of the transfer line 140 may be located at the front of the separation tank 110.

In this embodiment, the polyphase mixture transported along the transfer line 140 passes through the vertical region 141 and predominantly contains a liquid component. Accordingly, the fluid that flows into the separation tank 110 through the rear end of the transfer line 140 is predominantly water and oil, and a description thereof will be described later.

3 is a view showing the moving position and speed of each component of the polyphase flow in a general vertical tube. Referring to FIG. 3, the polyphase mixture in which the gas component and the liquid component are mixed rises along the vertical tube.

At this time, an annular flow occurs in the vertical tube, and the gas component moves through the vertical tube faster than the liquid component. That is, when the velocity of the gas component is V 1 and the velocity of the liquid component is V 2 , V 1 > V 2 . In this case, the faster gas component predominantly flows along the middle of the vertical tube, and the slower liquid component predominantly flows along the wall of the vertical tube.

Referring to FIG. 2, reflux may occur in the vertical region 141 of the transfer line 140 where the polyphase mixture rises. At this time, the gaseous component gas in the polyphase mixture can be dominantly distributed at the center of the passageway of the vertical region 141, and water, oil or the like as the liquid component can be dominantly distributed at the edge of the passageway of the vertical region 141 .

According to the present embodiment, in the vertical region 141, the branch line 150 branches. The branch line 150 provides a passageway for transferring gas, which is predominantly distributed in the middle of the passage of the vertical region 141 of the polyphase mixture, to the separation tank 110.

The leading end of the branch line 150 may be disposed in the vertical region 141 of the transfer line 140 as shown in FIG. 2, a vertical section 151 having a diameter smaller than that of the vertical section 141, and a vertical section 151 having a smaller diameter than the vertical section 141, And a direction change section 152. [

The rear end of the branch line 150 may be disposed inside the separation tank 110. The rear end of the branch line 150 may be located at the front of the separation tank 110.

The branch line 150 may be connected to an area where the separated gas in the separation tank 110 is accommodated. In this case, the gas that is predominantly introduced through the rear end outlet of the branch line 150 can be directly introduced into the gas receiving region in the branch tank.

The polyphase mixture moving along the transfer line 140 passes through the vertical region 141 and the gas component is removed to predominantly contain the liquid component. Accordingly, water and oil can be predominantly introduced into the separation tank 110 through the rear outlet of the transfer line 140.

The transfer line 140 may be connected to a region where the separated oil and water in the separation tank 110 are received. In this case, the liquid component introduced through the transfer line 140 can be directly introduced into the region where the liquid component in the separation tank 110 is accommodated.

In the present embodiment, the rear end outlet of the branch line 150 may be located in the boundary region of the separated oil and water in the separation tank 110. The branch line 150 may have a horizontal region 142 extending horizontally at its rear end.

4 is a view showing distribution of water and oil moving in a horizontal region of a transfer line according to an embodiment of the present invention. Referring to FIG. 4, the water and oil moving in the horizontal region 142 are positioned below the water by the specific gravity difference, and the oil is located above the water.

The water and the oil separated in the vertical direction moving in the horizontal region 142 can be introduced into the separation tank 110 through the rear exit of the branch line 150. At this time, when the rear end of the branch line 150 is located on the boundary between water and oil in the separation tank 110, water and oil that have passed through the horizontal region 142 of the branch line 150, It is possible to join the separated water and the oil in the oil separator 110, so that the separation efficiency can be improved.

The polyphase mixture separating apparatus 100 according to the present embodiment may further include a mesh member 160. The mesh member 160 may be disposed opposite the rear end of the transfer line 140 within the separation tank 110.

5 is a view showing a part of a mesh member according to an embodiment of the present invention. Referring to FIGS. 1 and 5, the water and oil discharged at the rear end of the transfer line 140 can pass through the mesh member 160. In this process, the oil mixed in the water collides with the mesh member 160, and the small oil droplet I can be merged into the large oil droplet II by the collision. The large oil droplet II can easily rise up by the specific gravity difference in the separation tank 110 and join the separated oil.

Further, the water mixed with the oil collides with the mesh member 160, and the small water droplet I can be merged into the large water droplet II by the collision. The large water droplet II can easily fall down in the separation tank 110 due to the specific gravity difference and join the separated water.

The multi-phase mixture separation apparatus 100 according to the present embodiment may further include a collision member 170. The collision member 170 may be disposed opposite the rear end of the transfer line 140 inside the separation tank 110.

6 is an enlarged view of a collision member according to an embodiment of the present invention. Referring to FIGS. 1 and 6, a polyphase mixture predominantly containing gas can be introduced into the separation tank 110 through the rear exit of the transfer line 140.

The introduced polyphase mixture collides with the collision member 170, and the liquid component mixed with the gas in the collision process falls separately, and the gas can join with the separated gas in the separation tank 110.

The polyphasic mixture separating apparatus 100 according to the present embodiment as described above allows a part of the polyphase mixture to flow into the separating tank 110 while being separated into a gas component and a liquid component before the polyphase mixture flows into the separating tank 110, Separation of the polyphase mixture in the tank 110 is facilitated and the separation efficiency can be improved.

In another aspect, the polyphase mixture is partially separated before it is introduced into the separation tank 110, so that the size of the separation tank 110 can be downsized, and the cost and installation space can be minimized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100: Multiphase mixture separator
110: Separation tank
120: partition member
134: Oil discharge portion
136:
137: Water extractor
138:
140: transfer line
141: Vertical area
142: Horizontal area
150: branch line
160: mesh member
170:

Claims (6)

A separation tank in which the polyphase mixture is introduced and separated into gas, oil and water by a specific gravity difference;
Wherein the polyphase mixture is vertically extended to provide a passage through which the polyphase mixture flows, and an annular flow is generated in the process of vertically ascending the polyphase mixture to provide a passage for transferring the polyphase mixture to the separation tank, A transfer line having a vertical region in which a gas as a gaseous component in a polyphase mixture is dominantly distributed in the center and the liquid component in the polyphase mixture is dominantly distributed at an edge; And
A vertical section branched from the vertical section and having a tip located at a center of the vertical section and having a diameter smaller than that of the vertical section and a direction changing section extending and extending in the vertical section, And a branch line which is predominantly distributed at the center of the passage of the passage for providing a passage for moving the moving gas to the separation tank. The method according to claim 1,
Wherein the transfer line is connected to a region where the oil separated in the separation tank and the water are received. 3. The method of claim 2,
Further comprising a mesh member disposed inside the separation tank so as to face a rear end of the transfer line. 3. The method of claim 2,
Said transfer line having a horizontal region extending horizontally at its rear end,
And the downstream end of the transfer line is located on the boundary between the oil and the water separated in the separation tank. The method according to claim 1,
Wherein the branch line is connected to a region where the gas separated in the separation tank is accommodated. 6. The method of claim 5,
Further comprising a collision member disposed inside the separation tank so as to face a rear end of the transfer line.
KR1020160035170A 2016-03-24 2016-03-24 Separator for multiphase mixture KR101824396B1 (en)

Priority Applications (1)

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KR1020160035170A KR101824396B1 (en) 2016-03-24 2016-03-24 Separator for multiphase mixture

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KR101824396B1 true KR101824396B1 (en) 2018-02-02

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060102559A1 (en) * 2002-09-09 2006-05-18 Sagatun Svein I Device for separating multi-phase fluids
WO2015180872A1 (en) * 2014-05-28 2015-12-03 Basf Se Mesh comprising a surface of hydrated aluminum oxides and their use for oil-water separation
US20160008741A1 (en) * 2012-02-21 2016-01-14 Caltec Limited Fluid separator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060102559A1 (en) * 2002-09-09 2006-05-18 Sagatun Svein I Device for separating multi-phase fluids
US20160008741A1 (en) * 2012-02-21 2016-01-14 Caltec Limited Fluid separator
WO2015180872A1 (en) * 2014-05-28 2015-12-03 Basf Se Mesh comprising a surface of hydrated aluminum oxides and their use for oil-water separation

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