WO2013002125A1 - 低温タンクの建設方法及び低温タンク - Google Patents
低温タンクの建設方法及び低温タンク Download PDFInfo
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- WO2013002125A1 WO2013002125A1 PCT/JP2012/065914 JP2012065914W WO2013002125A1 WO 2013002125 A1 WO2013002125 A1 WO 2013002125A1 JP 2012065914 W JP2012065914 W JP 2012065914W WO 2013002125 A1 WO2013002125 A1 WO 2013002125A1
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- tank
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- low
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- liquefied gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/025—Bulk storage in barges or on ships
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
- E04H7/02—Containers for fluids or gases; Supports therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/02—Large containers rigid
- B65D88/022—Large containers rigid in multiple arrangement, e.g. stackable, nestable, connected or joined together side-by-side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/02—Large containers rigid
- B65D88/022—Large containers rigid in multiple arrangement, e.g. stackable, nestable, connected or joined together side-by-side
- B65D88/027—Large containers rigid in multiple arrangement, e.g. stackable, nestable, connected or joined together side-by-side single containers connected to each other by additional means so as to form a cluster of containers, e.g. a battery of containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/76—Large containers for use underground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0147—Shape complex
- F17C2201/0157—Polygonal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0147—Shape complex
- F17C2201/0166—Shape complex divided in several chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0147—Shape complex
- F17C2201/0171—Shape complex comprising a communication hole between chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0604—Liners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0626—Multiple walls
- F17C2203/0629—Two walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/23—Manufacturing of particular parts or at special locations
- F17C2209/232—Manufacturing of particular parts or at special locations of walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0134—Applications for fluid transport or storage placed above the ground
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49904—Assembling a subassembly, then assembling with a second subassembly
Definitions
- the present invention relates to a method for constructing a cryogenic tank and a cryogenic tank.
- This application claims priority based on Japanese Patent Application No. 2011-142092 for which it applied to Japan on June 27, 2011, and uses the content here.
- low temperature tanks for storing low temperature liquefied gas such as LNG (Liquified Natural Gas) are being constructed.
- a low temperature tank is provided with the inner tank and the outer tank, for example, as shown in Patent Document 1.
- the inner tank directly stores the low-temperature liquefied gas.
- the outer tank is formed surrounding the inner tank. And when constructing such a low temperature tank, the whole low temperature tank including the above-mentioned inner tank and outer tank is formed and assembled at a predetermined construction site (construction location).
- the construction period of the low temperature tank varies greatly depending on the skill of the craftsman who constructs the low temperature tank.
- many skilled craftsmen are required.
- low temperature tanks are often constructed at various locations at the same time, and it is virtually impossible to dispatch skilled craftsmen at all construction sites. For this reason, it is difficult to shorten the construction period at the construction site.
- the present invention has been made in view of the above-described problems, and an object of the present invention is to shorten the construction period at a construction site when constructing a low temperature tank.
- the present invention adopts the following configuration as means for solving the above-described problems.
- a method for constructing a cryogenic tank for constructing a cryogenic tank for storing a cryogenic liquefied gas at a predetermined construction location A unit tank forming step for forming a plurality of unit tanks capable of storing liquefied gas at a factory separated from the construction location, a transporting step for transporting the unit tank to the building location, and a plurality of the units at the construction location. It has the inner tank assembly process which assembles an inner tank by connecting a tank, and the outer tank formation process which forms an outer tank around the said inner tank.
- a wall portion of the unit tank includes a metal membrane, a heat insulating material, and a liner in order from the storage region side of the low-temperature liquefied gas. ing.
- the outer tub made of concrete is formed by placing concrete around the inner tub in the outer tub forming step. .
- the unit tank has a polygonal shape in plan view.
- the plurality of unit tanks are connected to each other through a liquid hole opened at a lower portion of each unit tank and a gas hole opened at an upper portion. .
- the unit tank is configured so that the low-temperature liquefied gas extraction position of the inner tank is lowest in the inner tank assembly step. Assemble.
- the bottom surface of the unit tank constituting the inner tank may be inclined, and the lowest position of the bottom surface may be set as the extraction position of the low-temperature liquefied gas.
- the bottom surfaces of the adjacent unit tanks may be lowered stepwise, and the unit tank having the lowest bottom surface may be used as the extraction position for the low-temperature liquefied gas.
- a seventh aspect according to the present invention is a low-temperature tank that stores a low-temperature liquefied gas, and includes an inner tank to which a plurality of unit tanks are connected, and an outer tank that surrounds the inner tank.
- the inner tank of the low temperature tank is configured by connecting a plurality of unit tanks.
- These unit tanks are formed in a factory separated from the construction site (construction site) of the low-temperature tank. That is, according to the present invention, unit tanks used at various construction sites can be formed intensively in a factory. For this reason, unit tanks can be formed together without having high craftsmen go to the construction site.
- the inner tank is a so-called membrane tank including a metal membrane, a heat insulating material, and a liner, a high skill is required for a craftsman who forms the inner tank.
- inner tanks that is, unit tanks
- the work performed at the construction site is only the connection of the unit tank (assembly of the inner tank) and the formation of the outer tank. Therefore, the scene where a high skill is required at the construction site is reduced, and the construction period at the construction site is shortened.
- FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A. It is a perspective view of the unit tank which shows schematic structure of the unit tank with which the low temperature tank in one Embodiment of this invention is provided. It is sectional drawing along the perpendicular direction of the unit tank shown to FIG. 2A. It is sectional drawing along the horizontal surface of the unit tank shown to FIG. 2A. It is a flowchart for demonstrating the construction method of the cryogenic tank in one Embodiment of this invention. It is sectional drawing which shows the modification of the low temperature tank in one Embodiment of this invention. It is sectional drawing which shows the modification of the low temperature tank in one Embodiment of this invention. It is sectional drawing which shows the modification of the low temperature tank in one Embodiment of this invention. It is sectional drawing which shows the modification of the low temperature tank in one Embodiment of this invention. It is sectional drawing which shows the modification of the low temperature tank in one Embodiment of this invention.
- FIG. 1A and 1B are cross-sectional views showing a schematic configuration of a low-temperature tank 1 in the present embodiment.
- 1A is a cross-sectional view taken along the horizontal plane of the low-temperature tank 1
- FIG. 1B is a cross-sectional view taken along the line AA in FIG. 1A.
- the low temperature tank 1 of the present embodiment includes an inner tank 2, an outer tank 3, a foundation 4, a pumping device 5, and a BOG recovery device 6.
- the inner tank 2 is a container for storing a low-temperature liquefied gas such as LNG, and is formed by connecting a plurality of unit tanks 10.
- a low-temperature liquefied gas such as LNG
- nine unit tanks 10 are arranged adjacent to each other so that the shape of the inner tank 2 in plan view is a square.
- the number of unit tanks 10 constituting the inner tank 2 is not limited to nine, and is set according to the storage amount required for the inner tank 2.
- FIGS. 2A to 2C are schematic configuration diagrams of the unit tank 10.
- 2A is a perspective view of the unit tank 10
- FIG. 2B is a cross-sectional view along the vertical direction of the wall portion of the unit tank
- FIG. 2C is a cross-sectional view along the horizontal plane of the wall portion of the unit tank. .
- each unit tank 10 is set to a rectangular parallelepiped with a hollow interior. Although the upper part of the unit tank 10 is opened in FIG. 2A, it is also possible to install a roof part and close the upper part.
- a liquid hole 11 for connecting to an adjacent unit tank 10 can be formed in the wall portion of the unit tank 10.
- the adjacent unit tanks 10 are connected by connecting the liquid holes 11 facing each other.
- the liquid hole 11 is a hole for enabling liquid, that is, LNG to move between adjacent unit tanks 10.
- a gas hole 12 can be formed in the wall portion of the unit tank 10 as shown in FIG. 1B.
- This gas hole 12 is a hole for enabling movement of gas, that is, BOG (Boil Off Gas), between adjacent unit tanks 10.
- Adjacent unit tanks 10 are connected to each other via a liquid hole 11 opened at the lower part of the unit tank 10 and a gas hole 12 opened at the upper part. Thereby, good distribution of liquefied gas and BOG in a plurality of unit tanks 10 is attained. Moreover, only the liquefied gas stored in the lower part of the unit tank 10 or the BOG stored in the upper part of the unit tank 10 through the liquid hole 11 opened in the lower part of the unit tank 10 and the gas hole 12 opened in the upper part, The pumping device 5 or the BOG recovery device 6 can selectively take out.
- each unit tank 10 is equipped with the metal membrane 13, the heat insulating material 14, and the liner 15, as shown to FIG. 2B.
- the membrane 13 is a rectangular metal plate provided with a corrugation that absorbs thermal deformation at the center, and has a thickness of about several millimeters.
- An inner wall surface of the unit tank 10 is formed by arranging a plurality of membranes 13. For example, stainless steel is used as the metal forming the membrane 13.
- the heat insulating material 14 is interposed between the membrane 13 and the liner 15, and suppresses the vaporization of the low-temperature liquefied gas by preventing the heat transfer between the inside and the outside of the unit tank 10.
- the heat insulating material 14 is not necessary for all the wall portions of the unit tank 10, and can be removed from the wall portion facing the wall portion of the other unit tank 10.
- the liner 15 is disposed on the outermost side of the wall portion of the unit tank 10 and functions as a support for the heat insulating material 14 and the membrane 13.
- H-shaped steel 16 is provided on the wall portion of each unit tank 10 as a rigid member for maintaining the shape of the unit tank 10 at regular intervals.
- Each of such unit tanks 10 has a size that can be transported by a ship.
- the unit tank 10 may have a width of about 25 m, a depth and a height of about 15 m.
- the outer tub 3 is formed so as to surround the inner tub 2 formed by the plurality of unit tanks 10 from the outside.
- the outer tub 3 is formed of pearlite concrete.
- the foundation 4 is a part that serves as a support for supporting the inner tank 2 and the outer tank 3, and is fixed to the installation surface by a plurality of piles (not shown), for example.
- the pumping device 5 is a device for pumping the low-temperature liquefied gas stored in the inner tank 2 to the outside of the inner tank 2 and the outer tank 3, and is connected to one unit tank 10 among the plurality of unit tanks 10. Yes. That is, in the present embodiment, the unit tank 10 to which the pumping device 5 is connected is the low temperature liquefied gas take-out position.
- the BOG recovery device 6 is a device for recovering the BOG generated in the inner tank 2 and is connected to the upper part of the unit tank 10 that is the same as the pumping device 5.
- step S1 the unit tank forming process (step S1), the transporting process (step S2), the inner tank assembly process (step S3), and the outer tank A formation process (step S4) and a finishing process (step S5) are performed in order.
- the unit tank forming step (step S1) is a step of forming a plurality of unit tanks 10 at a factory separated from the construction site of the low temperature tank 1.
- a skilled craftsman forms the unit tank 10 by molding or welding the membrane 13, welding the H-shaped steel 16, or the like.
- the unit tank 10 formed in the unit tank forming step (step S1) in the present embodiment has a size that can be transported on a ship.
- unit tanks 10 that can be connected to different individuals and can store low-temperature liquefied gas are formed at a factory separated from the construction site.
- the shape of the unit tank 10 is maintained so that the unit tank 10 is not deformed in the subsequent transport process (step S2), the inner tank assembly process (step S3), and the outer tank formation process (step S4). Therefore, it is preferable to arrange a support for the inside of the unit tank 10.
- the transport process (step S2) is a process of transporting the unit tank 10 formed in the unit tank formation process (step S1) to the construction site. Specifically, one or more unit tanks 10 are stacked on one ship, and the plurality of unit tanks 10 are transported to a construction site by one or more ships.
- the operation of loading the unit tank 10 on the ship and the operation of unloading the unit tank 10 from the ship are performed by placing the unit tank 10 on a carriage and running the carriage.
- the unit tank can be easily moved only by pushing and pulling the carriage.
- the upper surface of the place where the ship-side cart is placed needs to match the land-side ground. For this reason, a cart is installed in a barge towed or propelled by a ship.
- the inner tank assembly process is a process of assembling the inner tank 2 by connecting a plurality of unit tanks 10 at the construction site.
- a foundation 4 serving as a foundation of the inner tank 2 is formed.
- formation of the foundation 4 may be performed in advance before the inner tank assembly process (step S3).
- the liquid hole 11 and the gas hole 12 are formed in a portion of the wall portion of the unit tank 10 that faces the wall portion of the other unit tank 10.
- the unit tank 10 is arranged and connected so that the liquid holes 11 and the gas holes 12 are connected to each other.
- positioning of each unit tank 10 in the low temperature tank 1 is decided beforehand, it is also possible to form the hole 11 for liquids and the hole 12 for gas previously in a factory.
- the outer tub forming step (step S4) is a step of forming the outer tub 3 around the inner tub 2.
- a mold used for placing concrete is formed.
- the assembly of the inner tank 2 in the inner tank assembly process (step S3) is performed inside the mold.
- concrete is cast in a formwork, and outer tub 3 is formed.
- step S5 is a process of forming the roof, installing the pumping device 5 and the BOG recovery device 6, and testing the low temperature tank 1.
- the inner tank 2 of the low temperature tank 1 is configured by connecting a plurality of unit tanks 10.
- These unit tanks 10 are formed in a factory separated from the construction site of the low temperature tank 1. That is, according to the construction method of the low temperature tank 1 of this embodiment, the unit tank 10 used in various construction sites can be formed intensively in a factory. For this reason, the unit tank 10 can be collectively formed, without the craftsman who has a high skill going to a construction site.
- the inner tank 2 is a so-called membrane tank including a metal membrane, a heat insulating material, and a liner as in the low-temperature tank 1 of the present embodiment
- high skill is required for the craftsman who forms the inner tank 2.
- the inner tank that is, the unit tank 10
- the construction method of the low temperature tank 1 of this embodiment the inner tank (that is, the unit tank 10) to be carried into various construction sites is gathered in a factory where craftsmen with high skills are concentrated. Can be formed.
- the work performed at the construction site is mainly only the connection of the unit tank 10 (assembly of the inner tank) and the formation of the outer tank 3. Therefore, the scene where a high skill is required at the construction site is reduced, and the construction period at the construction site is shortened.
- the wall portion of the unit tank 10 is made of the metal membrane 13, the heat insulating material 14, and the liner 15 in order from the low temperature liquefied gas storage region side. I have. For this reason, it is not necessary to perform the installation work of the heat insulating material 14 etc. at the construction site, and the construction period at the construction site is further shortened.
- the outer tank 3 made of concrete is formed by placing concrete around the inner tank 2 in the outer tank forming step (step S4). For this reason, compared with the case where a metal outer tank is formed, the skill is not required for the craftsman, and the construction period can be further shortened.
- the planar view shape of the unit tank 10 is rectangular.
- the present invention is not limited to this, and a unit tank 20 having a hexagonal shape in plan view can be used instead of the unit tank 10 as shown in FIG. It can be expected that the unit tank 20 having a hexagonal shape in plan view will hardly be deformed by an external force. For this reason, by using the unit tank 20 having a hexagonal shape in plan view, it is possible to prevent the unit tank 20 from being deformed during transportation or assembly.
- the planar view shape of the unit tank is not limited to the above-described configuration, and any shape can be adopted as long as a plurality of unit tanks can be easily connected to each other.
- the planar view shape of the unit tank may be a polygonal shape other than a square or a hexagon.
- the structure assembled so that all the unit tanks 10 might become horizontal was demonstrated.
- the present invention is not limited to this, and as shown in FIG. 5A and FIG. 5B, the low temperature liquefied gas take-out position of the inner tank 2 (the bottom surface of the unit tank 10 to which the pumping device 5 is connected) is the most.
- a configuration in which the unit tank 10 is assembled so as to be lowered can also be adopted.
- FIG. 5A and FIG. 5B the low temperature liquefied gas take-out position of the inner tank 2 (the bottom surface of the unit tank 10 to which the pumping device 5 is connected) is the most.
- the outer peripheral surface shape of the outer tank 3 does not need to be circular.
- the outer peripheral surface shape of the outer tub 3 can be matched with the shape of the inner tub 2.
- the arrangement pattern of the inner tub 2 can be arbitrary. It is also possible to connect the inner tank 2 in the vertical direction.
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- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
本願は、2011年6月27日に日本に出願された特願2011-142092号に基づき優先権を主張し、その内容をここに援用する。
内槽は、低温液化ガスを直接貯留する。また、外槽は、内槽を囲んで形成される。
そして、このような低温タンクを建設する場合には、予め定められた建設現場(建設箇所)にて、上述の内槽や外槽を含む低温タンクの全体を形成して組み立てている。
しかしながら、低温タンクは、様々な場所で同時に建設されることも多く、全ての建設現場において、技量の高い職人を派遣することは、実質的に不可能である。このため、建設現場での工期を短くすることが難しい。
つまり、本発明によれば、様々な建設現場で用いられるユニットタンクを、工場にて集中的に形成することができる。このため、高い技量を有する職人が建設現場に赴くことなくユニットタンクを纏めて形成することができる。
特に、内槽が金属製のメンブレンと、断熱材と、ライナとを備えるいわゆるメンブレンタンクである場合には、内槽を形成する職人に高い技量が求められる。これに対して、本発明によれば、様々な建設現場に搬入する内槽(すなわちユニットタンク)を高い技量を有する職人が集中的に配置された工場で纏めて形成することができる。
このため、本発明によれば、建設現場において行われる作業は、ユニットタンクの接続(内槽の組立て)と外槽の形成のみとなる。したがって、建設現場において高い技量が要求される場面が減少し、建設現場における工期が短縮する。
本実施形態においては、図1Aに示すように、内槽2の平面視形状が正方形となるように、9つのユニットタンク10が隣接して配置されている。
なお、内槽2を構成するユニットタンク10の数は、9つに限られるものではなく、内槽2に求められる貯留量に応じて設定される。
液体用孔11は、隣合うユニットタンク10同士の間で液体すなわちLNGを移動可能とするための孔である。
なお、ユニットタンク10の壁部には、液体用孔11の他に、図1Bに示すように、気体用孔12が形成可能とされている。この気体用孔12は、隣合うユニットタンク10同士の間で気体すなわちBOG(Boil Off Gas)を移動可能とするための孔である。
メンブレン13は、熱変形を吸収するコルゲーションが中央部に設けられた矩形状の金属板であり、厚さが数ミリ程度に設定されている。そして、複数のメンブレン13が配列されることによって、ユニットタンク10の内壁面が形成されている。このメンブレン13を形成する金属としては、例えばステンレス鋼を用いる。
断熱材14は、メンブレン13とライナ15との間に介在し、ユニットタンク10の内部と外部との熱の移動を阻止することによって低温液化ガスの気化を抑制する。なお、断熱材14は、ユニットタンク10の全ての壁部に対して必要ではなく、他のユニットタンク10の壁部と対向する壁部では除くことも可能である。
ライナ15は、ユニットタンク10の壁部の最も外側に配置されており、断熱材14及びメンブレン13の支持体として機能する。
なお、図2Cに示すように、各ユニットタンク10の壁部には、ユニットタンク10の形状を維持するための剛性部材として、H型鋼16が一定間隔にて設けられている。
例えば、船舶によって輸送可能とするためには、ユニットタンク10は、横幅が25m、奥行き及び高さが15m程度の大きさにすれば良い。
つまり、本実施形態においては、汲上装置5が接続されたユニットタンク10が低温液化ガスの取り出し位置となっている。
ユニットタンク形成工程(ステップS1)では、熟練した職人が、メンブレン13の成型や溶接、H型鋼16の溶接等を行うことによってユニットタンク10を形成する。
また、上述したが、本実施形態においてユニットタンク形成工程(ステップS1)で形成されるユニットタンク10は、船舶において輸送可能な大きさとされている。
このように、本実施形態においてユニットタンク形成工程(ステップS1)では、異なる個体同士で接続可能とされると共に個々が低温液化ガスを貯留可能なユニットタンク10が建設現場から離間した工場で形成される。
具体的には、単数あるいは複数のユニットタンク10を一隻の船舶に積み、一隻あるいは複数の船舶によって、複数のユニットタンク10を建設現場に輸送する。
このように支持台を介してユニットタンク10を吊上げることによって、ユニットタンク10に対して負荷が掛からず、ユニットタンク10の変形を防止することができる。さらに、吊上げることによって、ユニットタンク10を船舶の任意の位置に容易に載置することが可能となる。
このような場合には、台車の押し引きのみによって容易にユニットタンクを移動させることができる。
ただし、この場合には、船舶側の台車を載置する箇所の上面が陸地側の地面と合っている必要がある。このため、船舶によって牽引あるいは推進されるバージに台車を設置する。
内槽組立工程(ステップS3)では、まず内槽2の土台となる基礎4を形成する。なお、基礎4の形成は、内槽組立工程(ステップS3)よりも前に予め行っていても良い。
続いて、ユニットタンク10の壁部のうち、他のユニットタンク10の壁部に対向する箇所に、液体用孔11及び気体用孔12を形成する。そして、これらの液体用孔11及び気体用孔12同士が接続されるようにユニットタンク10を配置し接続する。なお、予め低温タンク1における各ユニットタンク10の配置が決まっている場合には、工場にて液体用孔11及び気体用孔12を予め形成しておくことも可能である。
この外槽形成工程(ステップS4)では、まず、コンクリート打設時に用いる型枠を形成する。なお、この型枠は、基礎4と同時に内槽組立工程(ステップS3)よりも前に行っておいても良い。この場合には、内槽組立工程(ステップS3)における内槽2の組立ては、型枠の内部で行われる。
そして、型枠内にコンクリートが打設されることによって、外槽3が形成される。
つまり、本実施形態の低温タンク1の建設方法によれば、様々な建設現場で用いられるユニットタンク10を、工場にて集中的に形成することができる。このため、高い技量を有する職人が建設現場に赴くことなくユニットタンク10を纏めて形成することができる。
特に、本実施形態の低温タンク1のように、内槽2が金属製のメンブレンと、断熱材と、ライナとを備えるいわゆるメンブレンタンクである場合には、内槽2を形成する職人に高い技量が求められる。これに対して、本実施形態の低温タンク1の建設方法によれば、様々な建設現場に搬入する内槽(すなわちユニットタンク10)を高い技量を有する職人が集中的に配置された工場で纏めて形成することができる。
本実施形態の低温タンク1の建設方法によれば、建設現場において行われる作業は、主としてユニットタンク10の接続(内槽の組立て)と外槽3の形成のみとなる。したがって、建設現場において高い技量が要求される場面が減少し、建設現場における工期が短縮する。
このため、建設現場において、断熱材14等の設置作業を行う必要がなくなり、建設現場における工期がより短縮する。
このため、金属製の外槽を形成する場合と比較して、職人に技量が求められず、工期のさらなる短縮化を図ることができる。
しかしながら、本発明はこれに限定されるものではなく、図4に示すように、ユニットタンク10に換えて平面視形状が六角形のユニットタンク20を用いることも可能である。
平面視形状が六角形のユニットタンク20は、外力に対して変形し難いであろうことが期待できる。このため、平面視形状が六角形のユニットタンク20を用いることによって、輸送時や組立て時にユニットタンク20が変形することを抑止することが可能となる。
なお、ユニットタンクの平面視形状は、上述の構成に限られず、複数のユニットタンク同士が容易に接続可能な形状であれば、任意の形状を採用することができる。例えば、ユニットタンクの平面視形状が正方形または六角形以外の多角形状であってもよい。
しかしながら、本発明はこれに限定されるものではなく、図5A及び図5Bに示すように、内槽2の低温液化ガスの取り出し位置(汲上装置5が接続されたユニットタンク10の底面)が最も低くなるようにユニットタンク10を組み立てる構成を採用することもできる。
なお、図5Aに示すように、全てのユニットタンク10の底面を傾斜させ、底面の最も低い位置を低温液化ガスの取り出し位置とする構成を採用しても良いし、図5Bに示すように、隣合うユニットタンク10の底面を階段状に下げてゆき、最も低い底面を有するユニットタンク10から低温液化ガスを取り出す構成を採用しても良い。
さらに、内槽2の配置パターンについても任意なものとすることができる。また、内槽2を上下方向に接続することも可能である。
Claims (10)
- 低温液化ガスを貯留する低温タンクを、予め定められた建設箇所に対して建設する低温タンクの建設方法であって、
互いに接続可能とされると共に個々が低温液化ガスを貯留可能なユニットタンクを前記建設箇所から離間した工場にて複数形成するユニットタンク形成工程と、
前記ユニットタンクを前記建築箇所に輸送する輸送工程と、
前記建設箇所にて複数の前記ユニットタンクを接続することによって内槽を組立てる内槽組立工程と、
前記内槽周りに外槽を形成する外槽形成工程と
を有する低温タンクの建設方法。 - 前記ユニットタンクの壁部が、前記低温液化ガスの貯留領域側から順に、金属製のメンブレンと、断熱材と、ライナとを備えている請求項1記載の低温タンクの建設方法。
- 前記外槽形成工程にて、前記内槽周りにコンクリートを打設することによって、コンクリートからなる前記外槽を形成する請求項1記載の低温タンクの建設方法。
- 前記外槽形成工程にて、前記内槽周りにコンクリートを打設することによって、コンクリートからなる前記外槽を形成する請求項2記載の低温タンクの建設方法。
- 前記ユニットタンクの平面視形状が多角形状である請求項1~4のいずれかに記載の低温タンクの建設方法。
- 前記複数のユニットタンクが、個々のユニットタンクの下部に開口する液体用孔及び上部に開口する気体用孔を介して連結される請求項1に記載の低温タンクの建設方法。
- 前記内槽組立工程にて、前記内槽の前記低温液化ガスの取り出し位置が最も低くなるように前記ユニットタンクを組み立てることを特徴とする請求項1~4のいずれかに記載の低温タンクの建設方法。
- 前記内槽を構成する前記ユニットタンクの底面を傾斜させ、底面の最も低い位置を前記低温液化ガスの取り出し位置とする請求項7に記載の低温タンクの建設方法。
- 隣り合う前記ユニットタンクの底面を階段状に下げてゆき、最も低い底面を有する前記ユニットタンクを前記低温液化ガスの取り出し位置とする請求項7に記載の低温タンクの建設方法。
- 低温液化ガスを貯留する低温タンクであって、
複数のユニットタンクが接続されてなる内槽と、
当該内槽を囲う外槽と
を備える低温タンク。
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CN201280030688.7A CN103635646B (zh) | 2011-06-27 | 2012-06-21 | 低温罐的建设方法 |
CA2840062A CA2840062C (en) | 2011-06-27 | 2012-06-21 | Method for constructing low-temperature tank and low-temperature tank |
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- 2012-06-21 AU AU2012276851A patent/AU2012276851B2/en not_active Ceased
- 2012-06-21 CA CA2840062A patent/CA2840062C/en not_active Expired - Fee Related
- 2012-06-21 CN CN201280030688.7A patent/CN103635646B/zh not_active Expired - Fee Related
- 2012-06-21 MY MYPI2013004500A patent/MY161296A/en unknown
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2013
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Also Published As
Publication number | Publication date |
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JPWO2013002125A1 (ja) | 2015-02-23 |
CA2840062C (en) | 2016-02-09 |
CN103635646B (zh) | 2016-05-04 |
MY161296A (en) | 2017-04-14 |
AU2012276851A1 (en) | 2014-01-16 |
CA2840062A1 (en) | 2013-01-03 |
JP5757332B2 (ja) | 2015-07-29 |
US9664338B2 (en) | 2017-05-30 |
AU2012276851B2 (en) | 2016-04-14 |
CN103635646A (zh) | 2014-03-12 |
US20140103046A1 (en) | 2014-04-17 |
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