WO2023058097A1 - Installation flottante - Google Patents

Installation flottante Download PDF

Info

Publication number
WO2023058097A1
WO2023058097A1 PCT/JP2021/036686 JP2021036686W WO2023058097A1 WO 2023058097 A1 WO2023058097 A1 WO 2023058097A1 JP 2021036686 W JP2021036686 W JP 2021036686W WO 2023058097 A1 WO2023058097 A1 WO 2023058097A1
Authority
WO
WIPO (PCT)
Prior art keywords
floating
flare
facility
liquid
knockout drum
Prior art date
Application number
PCT/JP2021/036686
Other languages
English (en)
Japanese (ja)
Inventor
徹 中山
Original Assignee
日揮グローバル株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日揮グローバル株式会社 filed Critical 日揮グローバル株式会社
Priority to PCT/JP2021/036686 priority Critical patent/WO2023058097A1/fr
Priority to JP2023552422A priority patent/JPWO2023058097A1/ja
Priority to CN202180101603.9A priority patent/CN117836206A/zh
Publication of WO2023058097A1 publication Critical patent/WO2023058097A1/fr

Links

Images

Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases

Definitions

  • the present invention relates to a floating facility provided with a natural gas processing facility.
  • the natural gas produced from the wellhead is pre-treated to remove various impurities from the natural gas before it is liquefied, and the natural gas after pre-treatment is liquefied to produce LNG (Liquidized A liquefaction process to obtain natural gas) is performed.
  • LNG Liquidized A liquefaction process to obtain natural gas
  • the natural gas processing facility is equipped with a large number of equipment such as various processing towers and heat exchangers used for the above-mentioned pretreatment and liquefaction treatment.
  • excess fluid may be generated in these devices, mainly composed of combustible gas (light fraction).
  • the surplus fluid is burned into combustible gas and then directed to the flare stack section where it is discharged to the outside. pulled out.
  • the surplus fluid extracted toward the flare stack section is also referred to as "flare gas”.
  • Flare gas may contain moisture and oil in addition to combustible gas. Therefore, on the outlet side of the flare pipe that discharges the flare gas from each device toward the flare stack, for example, a knockout drum that separates liquids such as moisture and oil from the flare gas, which is a combustible gas, or a knockout drum.
  • a drain drum is provided for separating the filtered liquid into oil and water. The flare gas from which the liquid has been separated is burned in the flare stack and released to the atmosphere, the oil content is sent to, for example, reprocessing, and the water content is treated as waste water.
  • separation facilities such as a knockout drum and a drain drum are also provided on the path through which the flare gas is discharged.
  • the floating facility in which the natural gas processing facility is installed on the floating body portion, which is a building has greater restrictions on the area of the site where various devices are installed compared to the natural gas processing facility installed on the ground. Therefore, in the natural gas processing facility provided on the floating body, the simplification of the facility configuration is further required.
  • Patent Document 1 in an FPSO (Floating Production, Storage and Off-loading system) in which a chemical plant is installed on a hull, it is possible to deal with chemical substances mixed in rainwater falling on the FPSO A wastewater treatment system is described.
  • Patent Literature 1 does not describe a technique for simplifying the equipment for processing the surplus fluid discharged toward the flare stack section.
  • the present invention has been made under such a background, and is intended to simplify the treatment facility for excess fluid discharged from equipment in a floating facility in which a natural gas processing facility is provided on a floating body part floating on the sea. provide technology.
  • the floating facility of the present invention is a floating facility in which a natural gas processing facility is provided in a floating body part floating on the sea, a slop tank into which a waste liquid containing at least one of oil and water generated in the natural gas processing facility flows and separates the waste liquid into a water phase discharged as waste water and an oil phase discharged as slop oil;
  • a flare pipe through which surplus fluid containing combustible light components is discharged from a plurality of devices provided in the natural gas processing facility;
  • a knockout drum provided at a position higher than the slop tank, into which the surplus fluid flows through the flare pipe and separates the surplus fluid into a gas containing light components and a liquid;
  • a flare stack section provided with a burner for burning the light components contained in the gas separated by the knockout drum and then releasing the light components into the atmosphere;
  • a slop tank flow path for directly flowing the liquid separated from the gas in the knockout drum into the slop tank.
  • the floating facility may also have the following features.
  • the slop tank channel is provided with a cooling section for cooling the liquid.
  • the slop tank is a deck forming the floating section. and said knockout drum is located at a height within 20m above the deck.
  • the liquid separated from the light components in a knockout drum is transferred to a slop tank.
  • a slop tank channel is provided to directly flow into the
  • FIG. 2 is a configuration diagram of equipment for treating flare gas; It is a side view of floating equipment.
  • FIG. 11 is a configuration diagram of a facility related to flare gas processing in a conventional floating facility. It is a side view of the conventional floating-body installation.
  • FIG. 3 is a configuration diagram showing another example of equipment related to flare gas processing;
  • FIG. 1 is a block diagram showing the flow of processing for liquefying natural gas in a natural gas processing facility 2 provided on a floating body 1.
  • Natural gas (NG) in a gaseous state is processed to remove impurities in each of the gas-liquid separation unit 21 , acid gas removal unit 22 , moisture removal unit 23 and mercury removal unit 24 .
  • the natural gas passes through the heavy separation section 25 that separates the heavy components, is liquefied and supercooled in the liquefaction section 26 and the end flash section 27, and is then transported to the LNG tank 28 for shipping. stored. Further, the heavy fraction separated by the heavy fraction separation section 25 is subjected to distillation of hydrocarbons in the distillation section 33 .
  • the light components (C1, C2) are sent to the liquefying section 26, the C3, C4 are stored in the LPG tank 34, and the condensate is stored in the condensate tank 32, respectively.
  • the liquid component separated from the natural gas by the gas-liquid separation unit 21 is stored in the condensate tank 32 after the vapor pressure is adjusted to remove the light component by the vapor pressure adjustment unit 31 .
  • surplus fluid containing combustible gas may be discharged during fluctuations in operation.
  • Such surplus fluid is sent to the flare stack section as flare gas and incinerated.
  • Flare gas may also contain liquids such as moisture and oil. Therefore, as shown in FIG. 2, the floating facility is provided with a facility for separating the flare gas discharged from the equipment 20 into a gas containing combustible light components and a liquid such as oil and water and treating them separately.
  • FIG. 2 is a configuration diagram of equipment for processing the flare gas.
  • FIG. 3 is a side view of the floating facility including the above facility.
  • the device 20 such as a pressure vessel generates a larger amount of light components than during steady operation, the pressure inside the device 20 increases.
  • Each device 20 is provided with a safety valve 200, and when the pressure inside the device 20 exceeds the set pressure of the safety valve 200, the safety valve 200 operates, and the light components are discharged as flare gas toward the flare pipe 50.
  • the knockout drum 3 is connected to the downstream side of the flare pipe 50 , and the flare gas discharged to the flare pipe 50 flows into the knockout drum 3 .
  • the knockout drum 3 uses gravity to separate liquids such as water and oil from the flare gas.
  • the flare gas from which the liquid is separated by the knockout drum 3 is sent to the flare stack section 5 .
  • the flare stack section 5 has a burner (not shown), and combustible light components are incinerated by the burner and then released to the atmosphere.
  • liquid is temporarily stored in the knockout drum 3 .
  • the safety valve 200 is activated when the set pressure is exceeded during the process, so flare gas is not always discharged from the safety valve 200 . Therefore, the liquid from which the gas is separated is temporarily stored in the knockout drum 3 until it reaches a certain amount.
  • a slop tank flow path 51 for extracting liquid is provided at the bottom of the knockout drum 3, and the slop tank flow path 51 is directly connected to the slop tank 4 that stores the waste liquid.
  • the slop tank 4 is a tank into which waste liquid containing at least one of oil and water generated by each device 20 provided in the floating facility flows.
  • the amount of stored liquid gradually increases while the natural gas is being processed in the natural gas processing facility 2 .
  • the valve V51 provided in the slop tank flow path 51 is opened to expel the liquid into the slop tank 4 .
  • the dispensed liquid joins with other waste liquid in the slop tank 4 .
  • the waste liquid is phase-separated into an oil phase 101 on the upper layer side and an aqueous phase 102 on the lower layer side by utilizing the difference in specific gravity between water and oil.
  • a pipe 52 is connected to the slop tank 4 at a height position where the oil phase 101 is formed. , is sent to the condensate tank 32 and stored therein.
  • the slop tank 4 is provided at a position lower than the deck 10 of the floating body section 1, for example, at a position closer to the rear inside the main body of the floating body section 1.
  • the knockout drum 3 described above is provided on the deck 10.
  • the flare pipe 50 is installed horizontally or inclined so that the installation height becomes gradually lower toward the installation position of the knockout drum 3 .
  • FIG. 3 and FIG. 5, which will be described later, show an example of the flare pipe 50 arranged at an angle.
  • the above configuration allows the liquid contained in the flare gas to flow toward the knockout drum 3 .
  • the installation position of the safety valve 200 through which the flare gas is discharged from each device 20 toward the flare pipe 50 is also installed at a position higher than the arrangement position of the flare pipe 50 for the same reason.
  • a drain drum 6 is provided downstream of the knockout drum 3 to separate oil and water from the liquid after gas-liquid separation. Separated water is sent to the slop tank 4 through the pipe 63 from the water phase after oil-water separation in the drain drum 6 . Further, from the oil phase separated by the drain drum 6 , the oil is extracted through the pipe 64 and subjected to reprocessing such as distillation or sent to the condensate tank 32 .
  • Reference numerals 61 and 62 in FIG. 4 indicate pumps for withdrawing the water phase and the oil phase from the drain drum 6, respectively.
  • the drain drum 6, the pipes 63 and 64 for extracting water and oil from the drain drum 6, the pumps 61 and 62 installed in the pipes 63 and 64, etc. had been installed.
  • the knockout drum 3 in order to transfer the liquid discharged from the knockout drum 3 to the drain drum 6 without using a pump or the like, it was necessary to install the knockout drum 3 above the drain drum 6 as shown in FIG. . Therefore, it is necessary to set the arrangement positions of the flare pipe 50 and the safety valve 200 at high places according to the arrangement height of the drain drum 6 .
  • the placement positions of the devices 20 constituting the natural gas processing facility 2 will be high.
  • the frame supporting each device 20 tends to be taller, and the pipes connecting the devices 20 are longer, and the amount of materials used for these frames and pipes tends to increase.
  • the floating facility of the present invention does not provide the drain drum 6 in the facility for treating the flare gas generated by the equipment 20 that constitutes the natural gas processing facility 2, and the knockout drum 3 is directly transferred to the slop tank 4.
  • a slop tank channel 51 is provided for inflow of liquid.
  • the knockout drum 3 can be provided at a lower position, for example, at a height within 20 m above the deck 10 compared to the conventional configuration. As a result, the installation positions of the flare pipe 50, the safety valve 200, and the like can be lowered compared to the conventional floating facility described with reference to FIGS. In addition, by reducing the height of the frame supporting each device 20 and shortening the pipes connecting the devices 20, the amount of materials used for these frames and pipes can be reduced.
  • a cooling unit 7 for cooling the liquid may be provided in the slop tank flow path 51 through which the liquid flows from the knockout drum 3 to the slop tank 4 .
  • the flare gas discharged from the device 20 may be hot. If the liquid separated from the high-temperature flare gas is discharged through the knockout drum 3 while it is still at a high temperature, the liquid exceeding the heat resistance temperature of the slop tank 4 may flow into the slop tank 4 . Therefore, by providing the cooling part 7 in the slop tank flow path 51 to cool the liquid discharged from the knockout drum 3 and send it to the slop tank 4, it is possible to suppress the high temperature liquid from flowing into the slop tank 4. - ⁇

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Abstract

Le problème a résoudre par l'invention est de simplifier un appareil de traitement destiné à un fluide excédentaire évacué d'un dispositif, dans une installation flottante munie d'un appareil de traitement de gaz naturel sur un corps flottant sur la mer. La solution de l'invention concerne un appareil de traitement d'un fluide excédentaire produit au niveau d'un dispositif constituant un appareil de traitement de gaz naturel, l'appareil de traitement du fluide excédentaire étant conçu pour ne pas comprendre de tambour de vidange, mais pour comprendre un circuit d'écoulement de cuve à résidus à travers lequel un liquide coule directement d'un séparateur à une cuve à résidus. Ainsi, une installation flottante présentant une configuration d'appareil simplifiée, sans installer un tambour de vidange, peut être obtenue.
PCT/JP2021/036686 2021-10-04 2021-10-04 Installation flottante WO2023058097A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2021/036686 WO2023058097A1 (fr) 2021-10-04 2021-10-04 Installation flottante
JP2023552422A JPWO2023058097A1 (fr) 2021-10-04 2021-10-04
CN202180101603.9A CN117836206A (zh) 2021-10-04 2021-10-04 浮体设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/036686 WO2023058097A1 (fr) 2021-10-04 2021-10-04 Installation flottante

Publications (1)

Publication Number Publication Date
WO2023058097A1 true WO2023058097A1 (fr) 2023-04-13

Family

ID=85804006

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/036686 WO2023058097A1 (fr) 2021-10-04 2021-10-04 Installation flottante

Country Status (3)

Country Link
JP (1) JPWO2023058097A1 (fr)
CN (1) CN117836206A (fr)
WO (1) WO2023058097A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104791811A (zh) * 2015-03-23 2015-07-22 七台河宝泰隆煤化工股份有限公司 一种火炬系统
KR102032055B1 (ko) * 2018-05-16 2019-10-14 한국조선해양 주식회사 가스 처리 시스템 및 이를 포함하는 해양 구조물
KR20190131374A (ko) * 2018-05-16 2019-11-26 현대중공업 주식회사 가스 처리 시스템 및 이를 포함하는 해양 구조물

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104791811A (zh) * 2015-03-23 2015-07-22 七台河宝泰隆煤化工股份有限公司 一种火炬系统
KR102032055B1 (ko) * 2018-05-16 2019-10-14 한국조선해양 주식회사 가스 처리 시스템 및 이를 포함하는 해양 구조물
KR20190131374A (ko) * 2018-05-16 2019-11-26 현대중공업 주식회사 가스 처리 시스템 및 이를 포함하는 해양 구조물

Also Published As

Publication number Publication date
CN117836206A (zh) 2024-04-05
JPWO2023058097A1 (fr) 2023-04-13

Similar Documents

Publication Publication Date Title
RU2448245C1 (ru) Сепарирование и улавливание жидкостей мультифазного потока
DK170761B1 (da) Fremgangsmåde og apparat til gasflotationsbehandling af en produceret vandblanding indeholdende olie og vand
US5988283A (en) Vertical combined production facility
AU2006316465B2 (en) A method for receiving fluid from a natural gas pipeline
AU2005266327B2 (en) Plant for separating a mixture of oil, water and gas
NO315028B1 (no) Fremgangsmate og et system for separering av en blanding
EP0537330A1 (fr) Separateur a hydrocyclone.
WO2011028093A1 (fr) Appareil de suppression de bouchon et ensemble de stabilisation du pétrole brut et procédé associé
US9034086B2 (en) Ventless tank system
NO312138B1 (no) Fremgangsmåte og sjöbasert installasjon for håndtering og behandling av flerfraksjonshydrokarboner til sjös
US20180073343A1 (en) Method and System for Subsea Purification of Produced Water From Subsea Oil Producing Installations
WO2023058097A1 (fr) Installation flottante
KR20240088678A (ko) 부유체 설비
NO303208B1 (no) FremgangsmÕte for drift av et anlegg for fjerning av olje fra vann
EA015894B1 (ru) Флотационное устройство
CA2585004A1 (fr) Appareil et procede de traitement de fluides provenant de puits de petrole
Twijnstra Effluent Discharge Limits and How Have They Been Met
WO1993016779A1 (fr) Procede et dispositif d'elimination des hydrocarbures contenus a l'etat dissous et/ou emulsionne dans une eau residuaire par stripage a la vapeur d'eau
US20230184431A1 (en) Integrated flare system for gas plant
RU2341317C1 (ru) Установка для подготовки воды
RU2361641C1 (ru) Трубная сепарационная установка
SU1583131A1 (ru) Установка отбора газа и паров нефти из технологических аппаратов
CN117751267A (zh) 天然气处理设备
RU2019256C1 (ru) Установка для подготовки нефтяного газа к транспорту
SU1605085A1 (ru) Термический деаэратор

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21959840

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023552422

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 202180101603.9

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE