WO2020021634A1 - Installation de corps flottant - Google Patents

Installation de corps flottant Download PDF

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Publication number
WO2020021634A1
WO2020021634A1 PCT/JP2018/027712 JP2018027712W WO2020021634A1 WO 2020021634 A1 WO2020021634 A1 WO 2020021634A1 JP 2018027712 W JP2018027712 W JP 2018027712W WO 2020021634 A1 WO2020021634 A1 WO 2020021634A1
Authority
WO
WIPO (PCT)
Prior art keywords
facility
natural gas
floating body
floating
living
Prior art date
Application number
PCT/JP2018/027712
Other languages
English (en)
Japanese (ja)
Inventor
剣 小林
圭史 谷川
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/JP2018/027712 priority Critical patent/WO2020021634A1/fr
Publication of WO2020021634A1 publication Critical patent/WO2020021634A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B29/00—Accommodation for crew or passengers not otherwise provided for

Definitions

  • the present invention relates to a floating facility provided with a natural gas processing facility on a floating body floating on the ocean.
  • natural gas processing equipment pre-treats natural gas before liquefaction to remove various impurities, and liquefies natural gas after pre-treatment.
  • LNG Liquidized Natural Gas
  • a floating facility provided with a natural gas processing facility on a floating body floating on the ocean is used.
  • Such floating facilities further include mooring facilities and living facilities.
  • a mooring facility and a liquefaction plant are provided in this order from the bow side of the floating body facility, and furthermore, a residential area and an engine room are located on the stern side of the location of the natural gas processing facility.
  • the provided floating facilities are described.
  • the floating equipment moored by the mooring equipment rotates on the water around the mooring equipment when the wind blows.
  • the bow side where the mooring equipment is provided is always located on the windward side.
  • the residential area arranged on the stern side is always located on the leeward side of the liquefaction plant. For this reason, the exhaust gas and steam exhausted from the liquefaction plant always go to the living facilities. Further, when gas leaks from the liquefaction plant, there is a problem that the leaked gas easily flows to the downtown-side residential area.
  • Patent Document 2 describes a multipurpose ship in which living equipment is provided on the bow side of the floating body, and mooring equipment is provided on the bow side of the center of the floating body.
  • Patent Documents 1 and 2 do not describe the layout of a natural gas processing facility or the like.
  • the present invention has been made under such a background, and an object of the present invention is to provide a technology for improving the safety of living facilities in a floating facility in which a natural gas processing facility is provided on a floating body floating on the ocean.
  • the floating body equipment of the present invention is disposed on the sea, a floating body portion having a planar shape longer in the ship length direction than in the ship width direction, A mooring facility provided on the floating body, mooring the floating body, and connected to a riser for underwater transport of natural gas, Living facilities provided in the floating body, A natural gas processing facility provided on the floating body for processing the natural gas; A piping unit for supplying natural gas received from the riser to the natural gas processing equipment,
  • the mooring facilities, living facilities, and natural gas processing facilities are arranged in this order from one end side of the ship length direction to the other end side,
  • the pipe section from the position of receiving the natural gas from the riser, passes through a region on the boat side of the floating body portion than the side portion of the living facility, or a region below the bottom portion of the living facility Passing through to the natural gas processing equipment to the natural gas supply position,
  • the pipe portion installed at a position passing below the side portion or the bottom portion of the living facility has an outer pipe portion forming a
  • the floating facility may have the following features.
  • a fireproof material that protects the living equipment when natural gas leaks from the piping part is coated on a side surface part or an outer bottom surface part of the living equipment facing an area where the pipe part passes. That you are.
  • the floating body is provided with a flare stack that burns gas discharged from the floating facility at a position closer to the other end than the natural gas processing facility when viewed from the living facilities.
  • the mooring facility is supported by a mooring facility support provided to protrude from the main body of the floating body.
  • the piping section is disposed in the floating body section.
  • mooring facilities, living facilities, and natural gas processing facilities are provided in this order from one end of the floating body. Therefore, even if there is a problem that natural gas leaks in the natural gas processing facility because the residential facilities are located on the windward side of the natural gas processing facility regardless of the wind direction when the floating body is moored, However, it is difficult to flow into the living facilities. Further, a piping section for supplying natural gas from the mooring facility to the natural gas processing facility is disposed so as to pass below the side of the living facility or on the side of the boat or below the bottom face, and the side of the living facility.
  • An outer pipe portion having a double structure is provided for a pipe portion installed at a position passing below the portion or the bottom portion. Therefore, even when the natural gas leaks from the pipe, the gas can be prevented from leaking to the outside by the outer pipe. Therefore, the safety of living facilities can be improved.
  • the natural gas processing facility of the present example separates and liquefies methane contained in natural gas (also referred to as NG in FIG. 1).
  • the natural gas is first removed by the acid gas removal unit 22 to remove the acid gas such as carbon dioxide and hydrogen sulfide. Removal is performed.
  • the natural gas treated by the acid gas removing unit 22 is further removed by a moisture removing unit 23.
  • mercury is removed from the natural gas treated in the moisture removing unit 23 in the mercury removing unit 24.
  • the mercury removing unit 24 may be placed before the acidic gas removing unit 22.
  • the natural gas from which impurities have been removed is separated into methane and heavy hydrocarbons having 2 or more carbon atoms in a hydrocarbon separation unit 25, and methane is liquefied in a liquefaction unit 26 to be liquefied natural gas (LNG).
  • LNG liquefied natural gas
  • a part of the liquid component gas-liquid separated from the natural gas in the gas-liquid separation unit 21 is stored in the condensate tank 32 via the vapor pressure adjustment unit 31 and then shipped. Further, the antifreeze containing water is phase-separated from the NG, and the antifreeze regeneration process 30 is performed. Monoethylene glycol (MEG) or the like is used as the antifreeze, and the regenerated antifreeze is supplied to the natural gas well.
  • the boil-off gas (BOG) evaporated from the LNG in the end flash unit 27 and the storage unit 28 (LNG tank) is pressurized in the pressurizing unit 29, part of which is used as combustion gas, and the rest is used as the combustion gas. It is returned to the stage before the liquefaction unit 26.
  • 2 and 3 are a plan view and a side view of a floating body (hull) 9 in the floating facility 1 according to the embodiment.
  • the floating facility 1 includes a floating body 9 that is disposed on the sea and has a planar shape that is longer in the length direction than in the width direction of the boat.
  • a mooring facility 3 a residential facility 4, and a natural gas processing facility 2 are provided in this order.
  • the floating body 9 is provided with a power generation turbine and a generator, a power source for the turbine, and utility equipment such as a boiler for generating steam to be a heat source for each distillation column. It is included in the gas treatment facility 2.
  • the mooring facility 3 is supported by a mooring facility support 33 provided to protrude from the bow of the floating body 9.
  • the mooring facility 3 is connected to, for example, a mooring line 34 connected to the sea floor to moor the floating body 9 and to a riser 35 for transporting mined natural gas underwater.
  • the mooring facility 3 is configured as an external turret provided to protrude from the floating body 9.
  • the mooring yoke It may be a tower yoke type mooring facility for mooring the floating body 9 via a connecting structure called Mooring (Yoke).
  • the floating body 9 is configured to be rotatable around a vertical axis passing through the central portion C of the mooring facility 3 and can pivot around the mooring facility 3 in accordance with the wind direction.
  • the floating body 9 can rotate around a landing type tower.
  • a dwelling facility 4 where a crew of the floating body facility 1 dwells is provided.
  • a natural gas processing facility 2 for processing natural gas is provided at a position further adjacent to the stern side of the living facilities 4.
  • the natural gas processing facility 2 is provided with a plurality of chimneys 20 for discharging exhaust gas and steam generated during natural gas processing.
  • a flare stack section 5 is provided at the port side (opposite to the berthing position of the tanker) at the end on the stern side of the floating body 9.
  • An evacuation boat 8 is provided, for example, at a position near the starboard side (at the side of the berthing position of the tanker) at the end on the stern side.
  • the natural gas received via the riser 35 is sent to the natural gas processing facility 2 via the piping 6 as shown in FIGS.
  • the pipe section 6 is located between the natural gas receiving position and the connection position with the riser 35 provided on the mooring facility 3 side, between the starboard side surface section of the dwelling facility 4 and the boat body of the floating body section 9. It is disposed on a route that passes through the area and reaches a position where natural gas is supplied to the natural gas processing facility 2.
  • an outer pipe section 60 that covers the pipe section 6 from the outer peripheral surface side and forms a double pipe structure is provided. Further, a refractory material 61 is coated on the side surface of the living facility 4 on the side of the pipe 6 opposite to the area where the pipe 6 passes.
  • a shutoff valve (not shown) is provided on each of the upstream side and the downstream side of the portion of the pipe portion 6 covered with the outer pipe portion 60.
  • a gas detector (not shown) for detecting leakage of natural gas into the space between the pipe section 6 and the outer pipe section 60 is provided. When gas leakage is detected by the gas detector, The shutoff valve is closed.
  • an evacuation facility for personnel in the floating equipment 1 is provided on the port side of the portside opposite to the area where the pipe section 6 passes on the side of the dwelling equipment 4.
  • Heliport 7 and evacuation boat 8 are provided.
  • a tanker 10 for transporting the LNG stored in the LNG tank 28 can be docked at a position on the starboard side of the floating body 9 on the side of the natural gas processing facility 2.
  • the floating body part 9 is moved to the vicinity of the offshore gas field, and the mooring cable 34 fixed to the seabed is connected to the mooring equipment 3, and the floating body part 9 Is moored at a location where gas is mined. Further, by connecting the riser 35 extending from the gas field to the mooring facility 3, the natural gas mined in the gas field is supplied to the natural gas processing facility 2 via the piping 6.
  • the floating body 9 is moored around the center C of the mooring facility 3 so as to be capable of turning. Therefore, when the wind direction changes in a direction indicated by an arrow in FIG. 4 even when the floating body 9 is at the position indicated by the dotted line in FIG. It turns around the vertical axis as the center, and moves to the position shown by the solid line in FIG.
  • the living facilities 4 are located on the windward side of the natural gas processing facilities 2 and the flare stack 5 on the floating body 9.
  • the floating body 9 turns around the mooring facility 3 to change its direction depending on the wind direction, and always tries to maintain the posture in which the mooring facility 3 side is located on the windward side.
  • the dwelling facilities 4 arranged closer to the mooring facility 3 than the natural gas processing facility 2 and the flare stack unit 5 are always located on the windward side of these facilities 2 and 5.
  • the piping section 6 for supplying natural gas to the natural gas processing facility 2 is provided at a location crossing the location where the living facilities 4 are located when the floating body section 9 is viewed from the boat width direction. For this reason, if flammable gas or the like in natural gas leaks from the pipe section 6 at the relevant location, there is a concern that it may affect the living facilities 4. Therefore, in the present embodiment, the piping section 6 installed at a position passing through the side surface section of the living facility 4 has a double pipe structure in which the outer peripheral surface side is covered by the outer pipe section 60. Therefore, even if the natural gas leaks from the piping 6 at the position passing through the side surface of the living facility 4, the natural gas can be retained in the outer pipe 60 and the leakage to the outside can be prevented.
  • a suction unit for sucking gas inside the outer pipe section 60 is provided, and the shut-off valve is shut off by detecting gas in the space between the pipe section 6 and the outer pipe section 60, and the inside of the pipe section 6 is removed. Pressure may be applied.
  • the mooring facility 3, the living facility 4, the natural gas processing facility 2 are arranged from the bow side of the floating body 9. Are provided in this order. Therefore, when the floating body 9 is moored, regardless of the wind direction, the living equipment 4 is located on the windward side of the natural gas processing equipment 2, so that the natural gas processing equipment 2 may have a problem in which natural gas leaks. Also, it is difficult for the leaked substance to flow into the living facilities 4.
  • a piping section 6 for supplying natural gas from the mooring facility 3 to the natural gas processing facility 2 is disposed so as to pass on the side of the boat rather than the side face of the living facility 4, and the side face of the living facility 4.
  • an outer pipe section 60 having a double structure of the pipe section 6 installed at a position passing the bottom side is provided. Therefore, even when natural gas leaks from the pipe section 6, the gas can be prevented from leaking to the outside by the outer pipe section 60. Therefore, the safety of the living facilities 4 can be improved.
  • the side surface of the dwelling equipment 4 facing the area where the pipe portion 6 passes is covered with a refractory material 61. For this reason, even if the natural gas leaks to the outside of the pipe part 6 (specifically, the outside of the outer pipe part 60) in the area, and the fire is ignited, the living facilities 4 can be protected. Further, evacuation facilities (a heliport 7 and an evacuation boat 8) for evacuation of personnel in the floating facility 1 are provided on the side of the boat opposite to the piping section 6 when viewed from the living facilities 4, so that the piping section 6 It is possible to safely evacuate even when a natural gas leak occurs.
  • evacuation facilities a heliport 7 and an evacuation boat 8 for evacuation of personnel in the floating facility 1 are provided on the side of the boat opposite to the piping section 6 when viewed from the living facilities 4, so that the piping section 6 It is possible to safely evacuate even when a natural gas leak occurs.
  • the arrangement of the pipe section 6 connecting the riser 35 and the natural gas processing equipment 2 is not limited to the examples shown in FIGS.
  • a raised floor structure is provided in which the living facilities 4 are installed via supports 41 provided on the floating body 9, and the piping section 6 passes below the bottom of the living facilities 4. You may comprise.
  • natural gas can be prevented from leaking by adopting a double pipe structure in which the outer peripheral surface side of the pipe section 6 installed at a position passing below the living facilities 4 is covered with the outer pipe section 60.
  • the refractory material 61 on the outer bottom surface of the living equipment 4 the living equipment 4 can be protected even if natural gas leaked from the piping 6 is ignited.
  • the piping 6 when arranging the piping 6 so as to pass below the bottom surface of the living facilities 4, the piping 6 may be provided so as to pass through the inside of the floating body 9. In this case, the living facilities 4 do not need to have a raised floor structure.
  • the mooring equipment 3 when the one end side of the floating body part 9 in which the steering room of the floating body equipment 1 is provided is called a “bow”, the mooring equipment 3 is not limited to the example provided on the bow side.
  • the mooring facility 3 may be provided at one end on the stern side, and the dwelling facility 4 and the natural gas processing facility 2 may be provided in this order toward the bow side.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Le problème décrit par la présente invention est de fournir une technologie pour améliorer la sécurité d'un logement résidentiel dans une installation de corps flottant obtenue en fournissant une usine de traitement de gaz naturel sur un corps flottant qui flotte sur la mer. La solution selon la présente invention porte sur une partie corps flottant comportant un équipement d'amarrage, un logement résidentiel et une usine de traitement de gaz naturel dans cet ordre. Par conséquent, lorsque la partie corps flottant est amarrée, le logement résidentiel est localisé, indépendamment d'une direction du vent, au vent de l'usine de traitement de gaz naturel. Par conséquent, même lorsqu'un problème de fuite de gaz naturel au niveau de l'usine de traitement de gaz naturel s'est produit, une fuite est peu susceptible de s'écouler dans le côté de logement résidentiel. En outre, une partie tuyauterie pour fournir du gaz naturel à partir de l'équipement d'amarrage à l'usine de traitement de gaz naturel est disposée de manière à passer sous la partie surface inférieure ou le côté d'un navire à partir de la partie surface latérale du logement résidentiel, et une partie tuyau externe est disposée pour fournir une double structure à la partie tuyauterie installée à un emplacement où la partie tuyauterie passe la partie surface latérale ou le côté de surface inférieure du logement résidentiel. Par conséquent, il est possible d'empêcher la fuite de gaz vers l'extérieur à partir de la partie tuyau externe lorsque le gaz naturel a fui de la partie tuyauterie. Par conséquent, la sécurité du logement résidentiel peut être améliorée.
PCT/JP2018/027712 2018-07-24 2018-07-24 Installation de corps flottant WO2020021634A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/027712 WO2020021634A1 (fr) 2018-07-24 2018-07-24 Installation de corps flottant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/027712 WO2020021634A1 (fr) 2018-07-24 2018-07-24 Installation de corps flottant

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WO2020021634A1 true WO2020021634A1 (fr) 2020-01-30

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH072049U (ja) * 1993-06-08 1995-01-13 三菱重工業株式会社 耐火機能付制振複合材
JPH11268684A (ja) * 1998-03-24 1999-10-05 Mitsubishi Heavy Ind Ltd ブイを利用した浮体の着脱式係留装置
JP2003041558A (ja) * 2001-07-26 2003-02-13 Michihiro Oe 水底小粒径固形物回収装置
JP2011219051A (ja) * 2010-04-14 2011-11-04 Mitsubishi Heavy Ind Ltd 浮体式液化天然ガス生産貯蔵積出設備
JP2011235675A (ja) * 2010-05-06 2011-11-24 Mitsubishi Heavy Ind Ltd 浮体式液化天然ガス生産貯蔵積出設備および液化天然ガス生産貯蔵積出方法
JP2012176670A (ja) * 2011-02-25 2012-09-13 Mitsubishi Heavy Ind Ltd 洋上高圧ガス配管構造
JP2013180618A (ja) * 2012-02-29 2013-09-12 Mitsubishi Heavy Ind Ltd 浮体式発電プラント
JP2016120814A (ja) * 2014-12-25 2016-07-07 三井造船株式会社 液化ガス貯蔵設備を備えた浮体構造物
JP2017043154A (ja) * 2015-08-25 2017-03-02 三井造船株式会社 液化ガス貯蔵設備を備えた浮体構造物及びその設計方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH072049U (ja) * 1993-06-08 1995-01-13 三菱重工業株式会社 耐火機能付制振複合材
JPH11268684A (ja) * 1998-03-24 1999-10-05 Mitsubishi Heavy Ind Ltd ブイを利用した浮体の着脱式係留装置
JP2003041558A (ja) * 2001-07-26 2003-02-13 Michihiro Oe 水底小粒径固形物回収装置
JP2011219051A (ja) * 2010-04-14 2011-11-04 Mitsubishi Heavy Ind Ltd 浮体式液化天然ガス生産貯蔵積出設備
JP2011235675A (ja) * 2010-05-06 2011-11-24 Mitsubishi Heavy Ind Ltd 浮体式液化天然ガス生産貯蔵積出設備および液化天然ガス生産貯蔵積出方法
JP2012176670A (ja) * 2011-02-25 2012-09-13 Mitsubishi Heavy Ind Ltd 洋上高圧ガス配管構造
JP2013180618A (ja) * 2012-02-29 2013-09-12 Mitsubishi Heavy Ind Ltd 浮体式発電プラント
JP2016120814A (ja) * 2014-12-25 2016-07-07 三井造船株式会社 液化ガス貯蔵設備を備えた浮体構造物
JP2017043154A (ja) * 2015-08-25 2017-03-02 三井造船株式会社 液化ガス貯蔵設備を備えた浮体構造物及びその設計方法

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