KR20180026080A - Separation device for floating Offshore Structure - Google Patents

Abstract

According to the present invention, provided is a separation apparatus for a floating offshore structure. The separation apparatus of the present invention comprises: a tank for accumulating a fluid mixture in an inner space by separating the fluid mixture into a water accumulation layer and an oil accumulation layer based on the difference in specific gravity to be accumulated; a member provided for the tank, enabling the fluid mixture to be collided in the tank; a gas-phase discharge unit provided for the tank, for discharging the gas-phase component separated from the liquid-phase component by the collision member; and a liquid-phase discharge unit for discharging each of oil and water, which are the liquid-phase components.

Description

 {Separation device for floating offshore structure}

The present invention relates to a floating structure, and more particularly, to a separation device for a floating ocean structure capable of increasing the efficiency of separation of a gas phase component (gas) and a liquid phase component (water and oil) .

The offshore fluids, such as FPSO (Floating Production Storage and Offloading) developed to treat crude oil production, storage and unloading processes on the hull, are used to separate crude oil from the reservoir into gas, oil and water A separator is provided.

Generally, a separator is a three-phase separator for separating crude oil into gas, oil and water, respectively, and a specific gravity difference is used for the three-phase separation or a cyclone is used. The technical idea of a water treatment system for treating various waste water and the like using a cyclone is variously disclosed in Korean Patent Publication No. 2010-0027709.

In general, the conventional three-phase separator using a specific gravity difference is horizontally introduced through a crude oil inflow pipe 105 installed in parallel through an upper region of the drum 100 as shown in FIG. 1 of Korean Patent Laid-Open Publication No. 2015-0125082 (Gas) and a liquid component (water and oil) due to a momentum change occurring when the fluid impacts the impact plate 107 disposed at the front end in the transport direction and falls to the bottom .

The separated liquid component is accumulated in the inner space of the drum 100 and accumulated at a predetermined point in the water discharge pipe 115 and the oil discharge pipe 125, respectively. At this time, the oil drain pipe 125 is installed so as to flow over the wiper panel 110 to discharge the oil stored in the divided area.

In such a three-phase separator, the fluid injection port and impingement plate are inexpensive but may have adverse effects, depending on the processing conditions of the inlet stream. Fluid injection inlets and impact plates can be effective for low momentum fluids, but because of the high momentum fluids they can cause small droplets or foam formation, limiting the use of fluid inlets and septum depending on pressure conditions.

Korean Patent Publication No. 10-2015-0125082

An object of the present invention is to provide a separator capable of reducing the momentum of a fluid mixture without using an impact plate.

An object of the present invention is to provide a separator capable of increasing the efficiency of separation of a liquid mixture into a gas phase component (gas) and a liquid phase component (water and oil).

The problems to be solved by the present invention are not limited thereto, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a tank for accumulating a fluid mixture in an inner space such that a fluid mixture is separated and accumulated as a water accumulating layer and an oil accumulating layer by a specific gravity difference; A member provided in the tank and impinging the fluid mixture in the tank; A vapor phase outlet provided in the tank and through which the vapor component separated from the liquid component by the impingement member is discharged; And liquid discharging portions for discharging oil and water as liquid components, respectively, may be provided.

The impingement member may further include a main supply line through which the fluid mixture is supplied; At least two sub-supply lines branching from the main supply line; And discharge portions connected to each of the sub supply lines and provided to be opposed to each other on the side walls of the tank so that the discharged fluid mixtures collide with each other.

Further, the discharge portions may discharge the fluid mixture in a horizontal direction or in a direction inclined at a predetermined angle.

Also, the diameter of the sub-feed line may be one-half of the diameter of the main feed line.

The discharging unit may include a plurality of discharging openings.

The partition member may further include a partition member provided in the tank for partitioning the oil storage region and the mixture storage space so that the level of the oil accumulation layer and the water accumulation layer is adjusted and the separated oil is not mixed with water again.

According to the embodiments of the present invention, there is a particular effect that the amount of pumping motion can be reduced through collision between the oil spouted mixture using a plurality of discharge portions.

According to the embodiment of the present invention, it is possible to increase the separation efficiency of gas, water and oil by more effective momentum reduction due to the increase of the collision speed.

 The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned can be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

1 is a perspective view showing a separation apparatus for a floating ocean structure according to a first embodiment of the present invention.
2 is a top cross-sectional view of the separation apparatus for the floating ocean structure shown in FIG.
3 is a side cross-sectional view of the separation apparatus for the floating ocean structure shown in FIG.
4 is a front cross-sectional view of the separation apparatus for the floating ocean structure shown in FIG.
5 is a view showing a discharge port of the discharge portion.
6 is a view showing a modified example of the discharge portion.

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 will be 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.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout the specification and claims. The description will be omitted.

FIG. 1 is a perspective view showing a separating apparatus for a floating offshore structure according to a first embodiment of the present invention, FIGS. 2 to 4 are a horizontal sectional view and a side sectional view of the separating apparatus for a floating offshore structure shown in FIG. Fig.

Referring to FIGS. 1 to 4, a separation apparatus 10 for a floating ocean structure according to an embodiment of the present invention may include a tank 100 and a collision member 200.

The tank 100 may have a hollow cylindrical shape, as shown in Fig. The tank 100 is provided with Well fluid through a collision member. As an example, a pair of discharge portions 230 for discharging the oil jet mixture may be provided at the upper end of the front end of the tank 100. The kinetic energy is reduced in the process of colliding the oil spouted mixture discharged through the pair of discharge portions 230. (I.e., gas) and liquid components (i.e., oil and water) in the course of falling down to the lower space of the tank 100 while the kinetic energy is reduced due to collision of the oil jet blast mixtures, Thereby preventing the jetted mixture from swinging inside the tank 100.

The oil jet mixture introduced into the interior of the tank 100 may be separated into gas, oil and water components due to the difference in specific gravity over time. As shown in Fig. 1, the gas component is positioned at the uppermost position due to the relative difference in mass, the oil component is positioned below the gas component, and the water component Lt; / RTI >

The tank 100 also includes a gas outlet port 114 through which the gas component flows out of the tank 100. The gas component exiting the gas outlet port 114 may be injected into a well (not shown) through various processes, used as fuel, or burned in a flare tower (not shown).

1 is referred to as a " separation zone " and the right side of the partitioning member 130 is referred to as an " oil separation zone " "

The oil component having a relatively large specific gravity due to the difference in specific gravity over time is formed at the lowermost part of the separation zone and forms the water accumulation layer W And the oil component is continuously accumulated above the water accumulation layer W to form the oil accumulation layer O. When the water level of the oil accumulation layer O becomes high, To the oil space beyond the partitioning member 130.

In order to extract the separated water component and the oil component, the tank 100 includes a water outflow port 116 provided in the separation zone and an oil outflow port 118 provided in the oil zone.

The separated water components are then re-injected into the wells or discharged to the sea after various processes. The reason why the above-described gas component or water component is injected into the oil well is that the gas component and the water component are injected into the oil well to prevent the internal pressure of the oil well gradually decreases due to the outflow of the oil well mixture, To increase the internal pressure of the oil well to increase the production.

The collision member 200 is for colliding the oil jet mixture in the tank 100 and may include a main supply line 210, a sub supply line 220 and a discharge portion 230.

The main supply line 210 may be connected to two sub supply lines 220. The sub supply line 220 may be connected to the discharge unit 230 installed on the side wall of the tank 100. Here, the discharge portion may be a spray nozzle. The oil jet mixture is branched into two sub supply lines 220 in the main supply line 210 and then injected into the tank through the respective discharge portions 230 to collide with each other. The sub-feed line 220 may be provided with a diameter that is a half of the diameter of the main feed line 210. For example, in the case of three discharge units, three sub-supply lines are provided, in which case the diameter of the sub-supply line may be 1/3 the diameter of the main supply line.

As shown in FIG. 4, the two discharge portions 230 may be arranged to face each other on the side wall of the tank 100. In this embodiment, two discharge portions 230 are shown to be opposed to each other. However, if necessary, the number of discharge portions 230 may be three or more, and the discharge portions 230 May be arranged coaxially or at different angles so that the discharge paths overlap one another to obtain the desired collision of the well jetted mixture.

2, an inlet stream having an area (diameter) A and a speed V of the main supply line 210 is divided into two sub supply lines 220 each having a diameter of A / 2 Create a branchstorm with the same speed V. The decrease in injection momentum can be explained by the following momentum equation.

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On the other hand, if we consider the situation where the opposite stream collides with the concept of the relative speed, it can be considered that the stationary wall collides at a speed of 2v each. Therefore, by substituting the corresponding values into the aforementioned equation

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Therefore, by using the flow of the same speed but introducing the concept of the relative speed, the impulse at the actual collision can be estimated to be larger than the conventional one. In this way, the effect of reducing the inlet momentum like the impact plate can be expected without the installation of the inlet device, and more effective reduction of the momentum can be expected due to the increase of the collision speed.

As described above, the separation device 10 for a marine structure according to the present invention reduces the momentum of injection through the collision between the well-jetted mixture using the dual discharge portion, rather than reducing the momentum of the oil- It is possible to design an impulse plate for a relatively low pressure flow using a second impulse plate in a state where the first momentum is reduced even when the impulse plate is not used or if necessary.

5 is a view showing a discharge port of the discharge portion.

5, a plurality of discharge ports 232 of the discharge portion 230 may be provided. However, the present invention is not limited thereto, and the discharge port of the discharge portion may be provided as one.

6 is a view showing a modified example of the discharge portion.

As shown in FIG. 6, the two discharge portions 230a may be provided with the discharge direction inclined. However, it is preferable that the two discharge portions 230a are disposed such that the discharge paths (discharge directions) overlap with each other in order to obtain desirable collision of the oil spurt mixture.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: tank 200: collision member
210: main supply line 220: sub supply line
230:

Claims (7)

A tank for accumulating the fluid mixture in the inner space so that the fluid mixture is separated and accumulated as a water accumulation layer and an oil accumulation layer by a specific gravity difference;
A collision member provided in the tank and colliding the fluid mixture in the tank;
A vapor outlet provided in the tank and through which the vapor component separated from the liquid component by the impingement member is discharged; And
And liquid discharging portions for discharging oil and water as liquid components, respectively. The method according to claim 1,
The impact member
A main supply line through which the fluid mixture is supplied;
At least two sub-supply lines branching from the main supply line;
And discharge portions connected to each of the sub supply lines and provided to the side walls of the tank so as to face each other so as to collide with each other. 3. The method of claim 2,
The discharge portions
And separating the fluid mixture in a horizontal direction. 3. The method of claim 2,
The discharge portions
And separating the fluid mixture in a direction inclined by a predetermined angle. 3. The method of claim 2,
Wherein the diameter of the sub-feed line is 1/2 of the diameter of the main feed line. 3. The method of claim 2,
The discharging portion
A separation device comprising a plurality of outlets. 3. The method of claim 2,
Further comprising a partitioning member provided in the tank for regulating the level of the oil accumulation layer and the water accumulation layer and partitioning the oil storage region and the mixture storage space so that the separated oil is not mixed with water again.

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