KR20170061380A - Separator for multiphase mixture - Google Patents

Abstract

A multiphasic mixture separation apparatus is disclosed. The polyphase mixture separator according to an embodiment of the present invention separates the polyphase mixture into gas, oil, and water by introducing the polyphase mixture, and separates the mixture into the mixture inlet portion, the oil discharge portion where the oil is discharged, A separation tank having a discharge portion for discharging the water; And a partition member disposed in the interior of the separation tank and blocking the flow of the water into the oil discharge portion, wherein the water discharge portion is provided in plurality, and the plurality of water discharge portions are provided in the mixture inlet portion, And the water discharge amount discharged from the plurality of water discharge portions may become larger as the distance from the mixture inlet portion increases.

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 device over time, and the separated oil components are separated 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 apparatus becomes longer. Therefore, a technology for increasing the residence time of the polyphase mixture is being developed.

An embodiment of the present invention is intended to provide a polyphase mixture separation device configured to have a longer residence time for the polyphase mixture.

According to one aspect of the present invention, a multiphase mixture is introduced and separated into gas, oil and water by a specific gravity difference, and a mixture inlet portion into which the multiphase mixture flows is formed in a front portion in the longitudinal direction, A separation tank having an oil discharge portion through which the oil is discharged; And a momentum damping portion connected to the mixture inlet portion inside the separation tank and damping kinetic energy of the polyphase mixture introduced through the mixture inlet portion, wherein the polyphase mixture introduced into the momentum damping portion is introduced into the separation tank To be discharged toward the front side wall of the multi-phase mixture separation apparatus.

The momentum damping portion may have a hollow shape extending in the width direction of the separation tank and a first discharge port through which the multiphase mixture introduced into the momentum damping portion is discharged may be formed on one surface of the momentum damping portion facing the front side wall .

The first outlet may have a slit shape extending in the width direction of the separation tank.

Further comprising a guide portion connected to the first outlet and guiding the polyphase mixture discharged from the first outlet to fall along the front side wall, and a second outlet for discharging the dropped polyphase mixture is provided in the guide portion .

Wherein the polyphase mixture separating apparatus further comprises sand and the lower end of the space partitioned by the guide section so that the polyphase mixture discharged from the first outlet falls along the front side wall is formed in the separation tank And may be connected to the sand discharge portion.

A valve is provided in the sand discharge portion, and the valve is normally closed and can be opened when sand is discharged.

The plurality of second outlets may be provided, and the plurality of second outlets may be disposed vertically apart along the guide portion.

According to the embodiment of the present invention, the polyphase mixture introduced into the momentum damping unit is discharged toward the front side wall of the separation tank, whereby the movement start point for separating the polyphase mixture moves forward, The separation of the polyhedral substance can be effectively performed.

1 is a view showing a device for separating a polyphase mixture according to an embodiment of the present invention,
2 is a front view of a momentum damping unit according to an embodiment of the present invention,
FIG. 3 is a view taken along arrow line AA in FIG. 1,
4 is a view showing a device for separating a polyphase mixture according to another embodiment of the present invention,
5 is a view showing an example of a section of the momentum damping section of FIG.

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.

1 is a view showing an apparatus for separating a polyphase mixture according to an embodiment of the present invention. 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.

Referring to FIG. 1, the apparatus 100 for separating polyphase mixture includes a separation tank 110 and a partitioning member 120.

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

For example, the polyphase mixture introduced into the separation tank 110 can 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 lowest specific gravity is positioned at the top.

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.

In the separation tank 110, a mixture inlet portion 131 is formed. The mixture inlet 131 may be formed at the front of the separation tank 110. The polyphase mixture may be introduced into the separation tank 110 through the mixture inlet 131. At the rear end of the mixture inlet 131 in the separation tank 110, a momentum damping unit 140 may be installed. This will be described later.

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. The oil discharge portion 134 is preferably located far from the mixture inlet portion 131. 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.

FIG. 2 is a front view of a momentum damping unit according to an embodiment of the present invention, and FIG. 3 is a view taken along the line A-A of FIG. 1 to 3, the momentum damping unit 140 attenuates the kinetic energy of the polyphase mixture flowing into the separation tank 110 through the mixture inlet 131. [

For example, when the polyphase mixture flows into the momentum attenuation unit 140, the polyphase mixture collides with the inner side of the momentum attenuation unit 140, so that kinetic energy can be attenuated. In this process, some gases can be separated from the polyphase mixture by impact. The separated gas flows into the inner space of the separation tank 110 through the outlet 143 formed on the side wall of the momentum damping unit 140 as shown in FIG.

When the multiphase mixture in which the momentum is attenuated by the momentum damping unit 140 flows into the separation tank 110, the flow inside the separation tank 110 can be stabilized. The polyphase mixture can be effectively separated.

In this embodiment, the polyphase mixture introduced into the momentum damping unit 140 can be discharged toward the front side wall of the separation tank. In this case, since the movement start point for separating the polyphase mixture moves forward, the time for which the polyphase mixture is retained in the separation tank 110 becomes longer, so that the polyphase separation can be effectively performed.

In this embodiment, the momentum damping portion 140 extends in the width direction of the separation tank 110 and may have a hollow shape. The momentum damping unit 140 may have a circular cross-section as shown in FIG. 1, but is not limited thereto.

A first discharge port 141 through which the polyphase mixture introduced into the momentum damping unit 140 is discharged may be formed on one surface of the damping unit 140 facing the front side wall.

The first outlet 141 may have a slit shape extending in the width direction of the separation tank 110 as shown in FIG. In this case, the polyphase mixture introduced into the momentum damping unit 140 can be widely spread and discharged in the width direction of the separation tank 110.

4 is a view showing a device for separating a polyphase mixture according to another embodiment of the present invention. 4, the polyphase mixture separating apparatus 200 according to the present embodiment includes a separating tank 210, a partitioning member 220, a mixture inlet 231, an oil discharging unit 234, A water discharge unit 238, a sand discharge unit 239, a momentum damping unit 240, and a guide unit 250.

The separation tank 210 of this embodiment and the partition member 220, the mixture inlet 231, the gas outlet 236, the oil outlet 234, the water extractor 237, and the water outlet 238 The gas discharge portion 136, the water extractor 137, the water discharge portion 138, and the water discharge portion 138 of the preceding embodiment, and the partitioning tank 110, the partitioning member 120, the mixture inlet portion 131, the oil discharge portion 134, And description thereof will be omitted.

The momentum damping unit 240 attenuates the kinetic energy of the polyphase mixture flowing into the separation tank 210 through the mixture inlet 231.

For example, when the polyphase mixture flows into the momentum attenuation unit 240, the polyphase mixture collides with the inner side of the momentum attenuation unit 240, so that kinetic energy can be attenuated. In this process, some gases can be separated from the polyphase mixture by impact. The separated gas flows into the inner space of the separation tank 210 through the outlet 243 formed on the upper wall of the momentum damping unit 240 as shown in FIG.

The multiphase mixture introduced into the momentum damping unit 240 may fall down into a spiral trajectory in the momentum damping unit 240. [ 5 is a view showing an example of a section of the momentum damping section of FIG.

Referring to FIG. 5, the inner space of the momentum damping unit 240 may extend in the vertical direction and have a circular cross-section. And the polyphase mixture may flow into the internal space of the momentum damping unit 240 with a tangential direction on the circular cross section. In this case, the polyphase mixture introduced into the momentum damping unit 240 may fall down into a spiral-shaped locus in the inner space of the momentum damping unit 240.

Referring to FIG. 4, the polyphase mixture introduced into the momentum damping unit 240 may be discharged toward the front side wall of the separation tank 210. A first outlet 241 through which the multiphase mixture introduced into the momentum damping unit 240 is discharged may be formed on one surface of the momentum damping unit 240 facing the front side wall.

According to the present embodiment, the guide portion 250 is connected to the first outlet 241. The guide part 250 can guide the polyphase mixture discharged from the first discharge port 241 to fall along the front side wall of the separation tank 210. In other words, the guide portion 250 can define a space in which the polyphase mixture discharged from the first discharge port 241 falls along the front side wall of the separation tank 210.

In this case, since the movement starting point for separating the polyphase mixture moves to the foremost position, the time for which the polyphase mixture is retained in the separation tank 210 becomes longer, so that the polyphase separation can be effectively performed.

The guide part 250 may have a second outlet 251 through which the polyphase mixture falling along the guide part 250 is discharged. The second outlet 251 may be provided in plurality and the plurality of second outlet 251 may be disposed in the vertical direction along the guide portion 250.

The guide portion 250 having the plurality of second discharge ports 251 may have a perforated plate shape. The polyphase mixture passes through the porous guide part 250 and the flow velocity becomes uniform, so that the separation efficiency can be increased. In addition, the generation of foam that may occur when the polyphase mixture falls in the momentum damping unit 140 can be reduced, and the generated foam can be partially removed while passing through the porous guide unit 250.

The lower end of the space partitioned by the guide unit 250 so that the polyphase mixture discharged from the first discharge port 241 drops along the front side wall of the separation tank 210 is discharged through the sand discharge unit 239 ).

When sand is contained in the polyphase mixture, sand may accumulate at the lower end of the space defined by the guide portion 250. The sand discharge unit 239 can discharge the sand accumulated at the lower end of the space defined by the guide unit 250 to the outside.

The sand discharge unit 239 may be provided with a valve 260. The valve 260 may be normally closed and open during sand removal.

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, 200: Multiphase mixture separator
110, 210: Separation tank
120, 220: partition member
131, 231:
134, 234: oil discharge portion
136, 236: gas discharge portion
137, 237: Water extractor
138, 238:
140, 240: momentum damping section
250: guide portion
260: Valve

Claims (6)

Phase mixture is introduced and divided into gas, oil and water by a specific gravity difference, and a mixture inlet portion into which the polyphase mixture flows is formed in a front portion in the longitudinal direction, and a mixture inlet portion in which the oil is discharged to the rear portion A separation tank having an additionally formed portion; And
And a momentum damping unit connected to the mixture inlet in the separation tank and damping kinetic energy of the polyphase mixture introduced through the mixture inlet,
And the polyphase mixture introduced into the momentum damping portion is discharged toward the front side wall of the separation tank. The method according to claim 1,
Wherein the momentum damping portion extends in the width direction of the separation tank and has a hollow shape,
And a first outlet for discharging the polyphase mixture introduced into the momentum damping portion is formed on one surface of the momentum damping portion facing the front side wall. 3. The method of claim 2,
Wherein the first outlet has a slit shape extending in the width direction of the separation tank. The method according to claim 1,
Further comprising a guide portion connected to the first outlet and guiding the polyphase mixture discharged from the first outlet to fall along the front side wall,
And a second outlet through which the dropped polyphase mixture is discharged is formed in the guide portion. 5. The method of claim 4,
Wherein the polyphase mixture further comprises sand,
And the lower end of the space partitioned by the guide portion is connected to the sand discharge portion formed in the separation tank so that the polyphase mixture discharged from the first discharge port falls along the front side wall. 5. The method of claim 4,
Wherein the second outlet is provided in plural,
And the plurality of second outlets are arranged to be spaced apart in the vertical direction along the guide portion.

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