KR20140077388A - Produced water de-sander system - Google Patents

Produced water de-sander system Download PDF

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Publication number
KR20140077388A
KR20140077388A KR1020120146148A KR20120146148A KR20140077388A KR 20140077388 A KR20140077388 A KR 20140077388A KR 1020120146148 A KR1020120146148 A KR 1020120146148A KR 20120146148 A KR20120146148 A KR 20120146148A KR 20140077388 A KR20140077388 A KR 20140077388A
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KR
South Korea
Prior art keywords
sand
accumulator
produced water
centrifugal separator
oil
Prior art date
Application number
KR1020120146148A
Other languages
Korean (ko)
Inventor
박호원
Original Assignee
현대중공업 주식회사
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Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020120146148A priority Critical patent/KR20140077388A/en
Publication of KR20140077388A publication Critical patent/KR20140077388A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • B01D21/262—Separation of sediment aided by centrifugal force or centripetal force by using a centrifuge
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
    • C10G31/09—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for by filtration
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
    • C10G31/10—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for with the aid of centrifugal force
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/20—Characteristics of the feedstock or the products
    • C10G2300/201—Impurities

Abstract

The present invention relates to a produced water di-sander system, and more particularly, to a system and method for preventing the breakdown of equipment for crude oil purification by separating sand and slurry mixed with crude oil before purification of drilled crude oil, Sander system capable of increasing the installation space efficiency and reducing the manufacturing cost by integrally constructing the accumulator.
To this end, an oil reservoir in which gas, oil, and produced water are separated and stored using a specific gravity of crude oil drilled from the seabed, comprising: a supply passage through which the produced water is supplied from the oil reservoir; An accumulator connected to the supply passage for centrifugally separating the produced water, an accumulator integrally formed at a lower portion of each of the centrifuges, for storing sand separated from the centrifugal separator, A vertical flow path formed between the accumulator and the tray and forming a channel through which sand is dropped by its own weight, and an automatic valve installed in each of the vertical flow paths, Sander system.

Description

&Quot; Produced water de-sander system "

The present invention relates to a produced water system, and more particularly, to a produced water de-sander system capable of separately processing sand and slurry contained in drilling crude oil.

As the international phenomenon of industrialization and industry develops, the use of resources such as petroleum is gradually increasing, and thus the stable production and supply of oil is becoming a very important issue on a global scale.

For this reason, the development of the marginal field or deep-sea oil field, which had been neglected due to economic difficulties, has become economic in recent years.

Therefore, along with the development of seabed mining technology, drilling rigs with drilling facilities suitable for the development of such oilfields have been developed.

Conventional submarine drilling can only be carried out by other tugboats, and a rig ship or a fixed platform for subsea drilling that performs submarine drilling operations with anchorage at one point of the sea using a mooring device is mainly used Recently, floating aquatic structure (FPSO) has been developed and installed in the same form as general ship so that it can be equipped with advanced drilling equipment and can navigate by its own power. It is used for submarine drilling and crude oil refining.

On the other hand, when the drilling operation is completed, as shown in FIG. 1, the FPSO 10, which is a floating offshore structure, lifts crude oil from the sea floor and performs refining process, and then transports the refined crude oil to the land.

The FPSO 10 refers to a facility that receives gas or crude oil from a drilled undersea and processes it before it is transported through a ship or pipeline.

On the other hand, the crude oil transferred to the FPSO 10 contains foreign matter, and most of the foreign matter is sand.

In other words, not only crude oil but also the sand around the seabed are inhaled during the process of raising the crude oil.

In particular, in sandy terrain waters, the proportion of sand contained in crude oil is substantial.

Accordingly, it is important to remove the sand contained in the crude oil before purifying the crude oil, in order not to damage the equipment of the purification module equipped with the equipment for purifying the crude oil.

That is, if crude oil without sand removal flows directly into the equipment of the refining module, the equipment of the refining module may be buried in sand during the refining process for the crude oil, which may cause serious damage.

Conventionally, there is no precise standard for separating sand from crude oil, and equipment for separating sand from crude oil has not been provided.

As a result, the work efficiency for maintenance of the refining module is increased and the efficiency of the operation is decreased.

Therefore, there is a demand for equipment for efficiently separating sand from crude oil drilled from the sea floor.

Korea Pub. No. 10-2012-0008844

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a process for separating oil- Sander system in which the centrifugal separator and the accumulator are integrated to increase the efficiency of the installation space.

In order to achieve the above-mentioned object, the present invention provides an oil reservoir in which crude oil, which is drilled from the sea floor, is separated and stored by using specific gravity gas, oil, and produced water, A plurality of centrifuges connected to the supply passage for centrifugally separating the produced water, an accumulator integrally formed at a lower portion of each of the centrifuges, for storing sand separated from the centrifugal separator, A vertical flow passage provided between the accumulator and the tray for forming a passage through which the sand falls due to its own weight, and an automatic valve installed in each of the vertical flow passages, Sander system that includes a pre-fabricated water de-sander system.

At this time, it is preferable that a centrifugal oily water and a liquid flow path through which gas is discharged are installed on the upper part of the centrifugal separator.

In addition, it is preferable that a liquid for decelerating the flow rate of the sand discharged from the centrifugal separator is stored in the accumulator.

Further, it is preferable that the centrifuges are arranged in parallel.

The centrifugal separator may further include a water level sensor for sensing the level of the produced water flowing through the supply channel.

In addition, it is preferable that the tray is moved by a conveying means using a roller action such as a roller or a conveyor.

The produced water de-sander system according to the present invention has the following effects.

First, by separating the produced sand from the oil extracted from the oil well, the offshore oil and gas production, which is the refining module of FPSO, can be operated for a long time to prevent the equipment from being damaged by foreign matter including sand. There is an effect that can be.

Thus, the quality of refined crude oil can be increased, and maintenance and maintenance costs for the equipment can be reduced.

Second, the centrifugal separator and the accumulator are integrally formed, thereby reducing the manufacturing cost of the system and maximizing the efficiency of the installation space.

Third, there is an effect that the convenience of the tray movement can be improved by moving the tray using a conveying means such as a conveyor or a roller.

Figure 1 is a side view of a floating offshore structure (FPSO)
2 is a configuration view of a produced water de-sander system according to a preferred embodiment of the present invention.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Hereinafter, a produced water de-sander system (hereinafter, referred to as a "de-sander system") according to a preferred embodiment of the present invention will be described with reference to FIG.

Crude oil drilled from the bottom of the seabed includes oil, gas and seawater.

This crude oil is stored in an oil reservoir, and then separates each fluid primarily using specific gravity.

That is, produced water is produced at the bottom of the reservoir and oil, gas and so on are placed on the top of the produced water.

At this time, the oil and gas are discharged to a separate place provided on one side of the oil reservoir.

Meanwhile, the produced water remaining in the oil reservoir contains sand drilled from the sea floor and various slurries, and the sand and slurry must be separated and treated.

These sand and slurries not only damage various equipments, but they can also affect the environmental pollution because they are oiled.

As a result, the produced water is separated from the sand and slurry by using a desalter system installed on the top side of the offshore structure.

The Desander system has the technical feature of separating solid particles, such as sand and slurry, from the produced water into separate disposal sites.

2, the desalter system includes a supply passage 100, a centrifugal separator 200, an accumulator 300, a tray 400, and a vertical passage 500.

The supply channel 100 is a channel through which the produced water separated from the oil reservoir is supplied to the centrifugal separator 200.

At this time, a valve 110 for opening and closing the channel of the supply passage 100 is provided on the supply passage 100.

Next, the centrifugal separator 200 separates the sand and the slurry by centrifugally separating the produced water supplied through the supply channel 100.

At this time, the liquid channel 210 is installed in the upper part of the centrifuge 200.

The liquid channel 210 is a channel through which the fluid centrifuged in the centrifuge 200 is discharged to a separate place.

That is, during the process of centrifugal separation of the produced water supplied to the centrifugal separator 200, the fluid is separated into the fluid and the sand by the centrifugal force. In this process, the separated fluid is discharged.

At this time, the fluid is separated into oily water containing oil adhered to the sand and gas which is evaporated while the internal pressure of the centrifuge 200 is released.

At this time, the gas contains hydrocarbons and the like, which may cause toxicity and explosion risk, and therefore must be discharged through the liquid passage 210.

A water level sensor 220 is installed at one side of the centrifuge 200.

The water level sensor 220 is for controlling the water level of the produced water supplied through the supply channel 100.

That is, when a certain amount of produced water is charged into the centrifuge 200 through the supply passage 100, the valve 110 of the supply passage 100 is shut off to stop the supply of the produced water .

Meanwhile, the centrifugal separators 200 are provided in a plurality of, but preferably two, and the centrifugal separators 200 are arranged in parallel.

As the operation for separating the sand is performed alternately, the overload of each device is solved, so that the device can be prevented from being overloaded and the safety accident of the worker can be prevented.

That is, the periphery of the centrifugal separator 200 may be exposed to harmful substances due to toxic substances such as hydrocarbons generated during centrifugal separation of the produced water in the centrifugal separator 200, 200) to operate continuously.

On the other hand, the supply passage 100 is branched and connected to each of the centrifuges 200, and the supply of the produced water is controlled by the valve 110.

Next, the accumulator 300 receives the sand and slurry separated from the centrifugal separator 200, cleans and discharges it to the tray 400.

The accumulator 300 is integrally formed under each of the centrifuges 200.

That is, since the centrifugal separator 200 and the accumulator 300 are integrally formed with each other as well as being installed in a vertical type, the efficiency of installation space can be increased.

Particularly, the centrifugal separator 200 and the accumulator 300 are made of expensive materials. However, since the centrifugal separator 200 and the accumulator 300 are integrally formed, the manufacturing cost can be reduced.

At this time, a certain amount of water is stored in the accumulator 300, and the falling rate of the sand dropped from the centrifugal separator 200 is reduced due to the stored water, and at the same time, the sand is washed.

An inflow channel 310 and a discharge channel 320 are installed at one side of the accumulator 300 for water storage and drainage.

Next, the tray 400 collects the sand contained in the accumulator 300 and processes the collected sand into a separate place, and is installed below the accumulator 300.

At this time, the tray 400 may be configured to form a certain space for collecting sand.

Next, the vertical channel 500 serves as a duct for discharging the sand separated from the accumulator 300 to the lower tray 400.

At this time, the vertical flow path 500 is installed below each of the accumulators 300.

That is, the arrangement structure of the centrifugal separator 200 and the accumulator 300 is provided as a vertical type, and the separated sand is dropped by its own weight. The vertical channel 500 is a channel for guiding sand falling by its own weight will be.

At this time, an automatic valve 510 is installed in each vertical flow passage 500, and the automatic valve 510 controls only the vertical flow passage 500 of the operated centrifugal separator 200 to be opened.

On the other hand, a conveying means 600 such as a roller or a conveyor is preferably provided below the tray 400.

This is for facilitating the movement of the sand collected on the tray 400, so that the tray 400 on which the sand is collected can be conveniently moved to a separate place by using the conveying means using the rolling action.

Hereinafter, the operation of the dig sander system constructed as described above will be described.

The supply passage 100A is opened and the produced water is supplied to the one centrifuge 200A from the oil reservoir through the supply passage 100A.

At this time, the branched supply passage 100B leading to the other centrifuge 200B is closed.

The water level sensor 220 senses the level of the produced water coming into the centrifuge 200A and closes the supply channel 100A when a certain amount of produced water is supplied.

Thereafter, the produced water introduced into the centrifugal separator 200A is converted into a tangential velocity.

Thereafter, the produced water moves to the downstream side of the centrifugal separator 200A, which gradually becomes narrower toward the lower part, and the speed and the centrifugal force in the tangential direction are increased.

At this time, the interior of the centrifugal separator 200A is in a high pressure state, and sand, slurry, etc. having a large specific gravity are subjected to a larger centrifugal force to move to the inner peripheral surface side of the centrifugal separator 200A. 200A.

Thereafter, the sand and slurry pushed to the inner peripheral surface side of the centrifugal separator 200A are directly dropped to the accumulator 300A.

At this time, the oily water is drained through the liquid passage 210.

At this time, in the process of draining the oily water, the pressure inside the centrifugal separator 200A is back pressure. In this process, the oil is vaporized and harmful gas such as hydrocarbons is generated.

The noxious gas is also discharged through the liquid passage 210 and is degassed at a separate place.

On the other hand, the sand and the slurry fall directly into the accumulator 300A while maintaining the centrifugal force by inertia. The sand and the slurry fall down by the water filled in the accumulator 300A, and the accumulator 300A ).

Thereafter, the discharge passage 320 of the accumulator 300A is opened to drain the fluid, and the vertical passage 500A is opened to drop the sand and slurry into the tray 400A.

Thereafter, the sand and slurry are collected in the tray 400A and conveyed to the onshore by the conveying means 600, and then sent to a separate processing facility for processing.

Meanwhile, after the above-described series of separating operations are performed, in order to continuously perform the separating operation, the system is changed over to one side.

This is to prevent the overload of the system and to eliminate the harmful gas around the centrifuge 200 as described above so as to secure the safety of the operator.

That is, the continuity of the separation operation can be maintained by operating one side system while one system is stopped until the harmful gas is dissolved.

For this purpose, the branched supply passage 100B, which has been closed, is opened to introduce the produced water into the other centrifugal separator 200B.

At this time, the supply passage 100A communicating with any of the centrifuges 200A stopped is closed.

Thereafter, the sand separated from the centrifuge 200B through the series of operations described above falls directly to the accumulator 300B.

Thereafter, the sand processed in the accumulator 300B is discharged to the tray 400B through the vertical flow path 500B, and then sent to the shore and processed.

As described above, the produced water desalter system according to the present invention can prevent the equipment failure due to sand or the like by separating and removing the sand and slurry contained in the drilled crude oil, thereby improving the quality of the refined oil There are technical features that can be.

Further, since the centrifugal separator and the accumulator are integrally formed, the efficiency of the installation space can be increased and the manufacturing cost can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

100: Supply flow path 200 (200A, 200B): Centrifuge
210: Liquid passage 300 (300A, 300B): Accumulator
400: Tray 500 (500A, 500B): Vertical channel
600: conveying means

Claims (6)

1. An oil reservoir for separating and storing gas, oil, and produced water using a specific gravity of crude oil drilled from the sea floor,
A supply passage through which the produced water is supplied from the oil reservoir;
A plurality of centrifuges connected to the supply passage for centrifugally separating the produced water;
An accumulator integrally formed at a lower portion of each of the centrifuges and storing the sand separated from the centrifugal separator;
A tray installed below the accumulator for collecting sand of the accumulator;
A vertical flow path provided between the accumulator and the tray, the vertical flow path forming a channel through which sand is dropped by its own weight;
And an automatic valve installed in each of the vertical flow paths. The method according to claim 1,
Wherein a centrifugal oily water and a liquid flow path through which gas is discharged are installed on the upper portion of the centrifugal separator. 3. The method according to claim 1 or 2,
Wherein a liquid for decelerating the flow rate of the sand discharged from the centrifugal separator is stored in the accumulator. 3. The method according to claim 1 or 2,
Wherein the centrifuges are arranged in parallel. 3. The method according to claim 1 or 2,
Wherein the centrifugal separator is provided with a water level sensor for sensing the water level of the produced water flowing through the supply channel. 3. The method according to claim 1 or 2,
Wherein the tray is moved by a conveying means using a rolling action such as a roller or a conveyor.

KR1020120146148A 2012-12-14 2012-12-14 Produced water de-sander system KR20140077388A (en)

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KR1020120146148A KR20140077388A (en) 2012-12-14 2012-12-14 Produced water de-sander system

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Application Number Priority Date Filing Date Title
KR1020120146148A KR20140077388A (en) 2012-12-14 2012-12-14 Produced water de-sander system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160054329A (en) * 2014-11-06 2016-05-16 (주)나우이엔에스 Interworking method of plural centrifuge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160054329A (en) * 2014-11-06 2016-05-16 (주)나우이엔에스 Interworking method of plural centrifuge

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