CN111692515A - LNG storage tank and LNG tank deck structure - Google Patents
LNG storage tank and LNG tank deck structure Download PDFInfo
- Publication number
- CN111692515A CN111692515A CN202010677475.XA CN202010677475A CN111692515A CN 111692515 A CN111692515 A CN 111692515A CN 202010677475 A CN202010677475 A CN 202010677475A CN 111692515 A CN111692515 A CN 111692515A
- Authority
- CN
- China
- Prior art keywords
- tank
- dome
- storage tank
- inner tank
- lng
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000003860 storage Methods 0.000 title claims abstract description 95
- 238000007906 compression Methods 0.000 claims description 27
- 235000019362 perlite Nutrition 0.000 claims description 14
- 239000010451 perlite Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 21
- 238000009417 prefabrication Methods 0.000 abstract description 10
- 230000006835 compression Effects 0.000 description 24
- 239000007788 liquid Substances 0.000 description 15
- 239000012774 insulation material Substances 0.000 description 13
- 238000009413 insulation Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 229910001562 pearlite Inorganic materials 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000011491 glass wool Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F17C3/04—Vessels not under pressure with provision for thermal insulation by insulating layers
-
- 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
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
-
- 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
- F17C2201/0104—Shape cylindrical
- F17C2201/0119—Shape cylindrical with flat end-piece
-
- 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
- F17C2201/03—Orientation
- F17C2201/032—Orientation with substantially vertical main axis
-
- 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
- F17C2203/01—Reinforcing or suspension means
- F17C2203/011—Reinforcing means
- F17C2203/012—Reinforcing means on or in the wall, e.g. ribs
-
- 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
- F17C2203/03—Thermal insulations
- F17C2203/0304—Thermal insulations by solid means
- F17C2203/0337—Granular
- F17C2203/0341—Perlite
-
- 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
- F17C2203/0614—Single wall
- F17C2203/0619—Single wall with two layers
-
- 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
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to an LNG storage tank and an LNG tank top structure, wherein the LNG tank top structure comprises an outer tank dome and an inner tank dome, the outer tank dome is arched and is of a net shell structure, and the outer tank dome is used for being connected with the top of the outer tank of the storage tank; the inner tank dome is arched, is of a net shell structure and is used for being connected with the top of the inner tank of the storage tank. The invention does not need to adopt the construction mode of the original suspended ceiling structure for prefabrication, but adopts the inner and outer double-layer reticulated shell structure for prefabrication, can effectively improve the construction speed of the storage tank, and can reduce the influence of the shaking wave height on the height of the storage tank, thereby reducing the design height of the storage tank.
Description
Technical Field
The invention relates to the technical field of LNG storage tanks, in particular to an LNG storage tank and an LNG tank top structure.
Background
The tank deck structure of LNG (liquid) storage tank adopts the mode of dome and furred ceiling to design the construction usually, and wherein outer tank dome plays main supporting role, and inner tank upper portion furred ceiling plays cold insulation and heat insulation effect, carries out the furred ceiling prefabrication again after carrying out the dome prefabrication earlier during the construction and connects through the jib, carries out the installation of rising to the storage tank deck through the mode of gas lift during the construction. After installation, the ceiling glass wool is laid on the upper portion of the ceiling to play a role in cold insulation and heat insulation, and the pressure balance hole is formed in the ceiling to communicate the gas phase space inside and outside the storage tank, so that the pressure is balanced. Traditional LNG storage tank LNG tank deck structure is because can not be confined structure (need to consider the pressure increase problem after the liquid gasification) between furred ceiling and the inner tank, and inside cryogenic liquids have probably spills over and gets into the outer tank under the earthquake effect, leads to the outer tank inefficacy, so need consider when designing the inner tank and rock the wave height to give the abundant surplus of inner tank high design. And what fill in the annular space between traditional LNG storage tank inner tank and the outer jar is the pearlite powder, because the inner diameter diminishes after the inner tank precooling shrink, the annular space volume increase can lead to the problem that the pearlite subsides.
The conventional LNG storage tank structure is as shown in fig. 1, the overall structure is composed of an inner tank 1 and an outer tank 2, perlite 14 is filled in an annular space between the inner tank 1 and the outer tank 2, and low-temperature liquid is loaded in the inner tank 1, so that the annular space can be shrunk after precooling, the volume of the annular space between the inner tank 1 and the outer tank 2 can be increased, and the powdered perlite 14 can sink, and the conventional engineering practice is to reserve enough margin on the upper part of the perlite 14 to prevent the perlite from sinking too fast.
In fig. 1, 1 upper portion of inner tank is the furred ceiling structure, and this furred ceiling structure is connected as an organic whole all the time with the tank deck on the outer jar to each position of the lid of guaranteeing the inner tank can both be effectively supported, and be unlikely to because of the middle part just can produce the problem of collapsing if there is not the support. The suspended ceiling structure on 1 upper portion of inner tank is including suspended ceiling 11, the furred ceiling glass wool 12 and the jib 13 that are planar structure, and wherein jib 13 is connected with the dome of the outer jar on furred ceiling 11 and upper portion, and furred ceiling glass wool 12 plays adiabatic heat retaining effect on furred ceiling 11. Under the earthquake effect, the cryogenic liquid in the inner tank 1 can rock, and because the suspended ceiling 11 and the inner tank 1 are not of a closed structure, the cryogenic liquid in the inner tank 1 can rock and overflow to the outer tank 2. Compared with the inner tank 1, the outer tank 2 itself cannot bear low temperature, so the influence of the sloshing of the liquid is considered when designing the height of the inner tank 1, and the height of the inner tank 1 needs to be high enough to avoid sloshing and overflowing of the low-temperature liquid.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an LNG storage tank and an LNG tank top structure, so that the height of an inner tank does not need to be increased intentionally, and liquid in the tank does not overflow; further, the invention also aims to solve the problem that the heat insulation material between the inner tank and the outer tank is easy to settle.
The present invention first proposes an LNG tank deck structure comprising an outer tank dome and an inner tank dome, wherein,
the outer tank dome is arched and is of a net shell structure, and the outer tank dome is used for being connected with the top of an outer tank of the storage tank;
the inner tank dome is arched, is of a net shell structure and is used for being connected with the top of the inner tank of the storage tank.
The tank top of the storage tank is prefabricated in a construction mode that an original inner tank is of a suspended ceiling structure, the inner layer net shell structure and the outer layer net shell structure are adopted for prefabrication, the construction speed of the storage tank can be effectively increased, and the influence of the shaking wave height on the height of the storage tank can be obviously reduced, so that the design height of the storage tank is reduced.
According to one embodiment of the invention, the latticed shell structure comprises lining plates, ring beams and longitudinal beams, wherein the ring beams circumferentially surround along the circumferential direction, the longitudinal beams are arranged along the radial direction and connected with the ring beams, and the lining plates are connected to the ring beams and the longitudinal beams in a covering manner; the ring beam and the longitudinal beam are provided with a plurality of parts.
According to one embodiment of the invention, the spacing between the plurality of ring beams in the latticed shell structure of the outer tank dome is smaller than the spacing between the plurality of ring beams in the latticed shell structure of the inner tank dome; the interval between the plurality of longitudinal beams in the latticed shell structure of the outer tank dome is smaller than the interval between the plurality of longitudinal beams in the latticed shell structure of the inner tank dome.
According to an embodiment of the present invention, the LNG tank deck structure further includes a temporary connection member for temporarily connecting the outer tank dome and the inner tank dome, preferably, the temporary connection member is a set of connection rods connected between an inner bottom surface of the outer tank dome and an outer top surface of the inner tank dome.
According to an embodiment of the invention, the LNG tank deck structure further comprises an outer tank connecting part for connecting an outer tank of the storage tank and the outer tank dome, and an inner tank connecting part for connecting an inner tank of the storage tank and the inner tank dome.
According to one embodiment of the invention, the outer tank connecting part and the inner tank connecting part each comprise a compression ring and a compression ring, wherein the compression ring is connected with the tank wall of the outer tank or the inner tank, and the compression ring is connected with the outer tank dome or the inner tank dome.
According to an embodiment of the invention, the pressure receiving areas of the inner tank connection and the outer tank connection each satisfy
Wherein P is the internal pressure of the storage tank, R is the radius of the inner tank wall or the outer tank wall of the storage tank, Sc is the allowable material compressive stress of the storage tank, and theta isThe compression-resistant ring slope angle of the storage tank.
The invention further provides a storage tank which comprises an inner tank, an outer tank and the LNG tank top structure, wherein the outer tank is arranged on the outer side of the inner tank, the tank top of the inner tank is connected with the inner tank dome in a sealing mode, and the tank top of the outer tank is connected with the outer tank dome in a sealing mode.
According to an embodiment of the invention, the storage tank further comprises an annular space between the inner tank and the outer tank, the annular space being filled with an insulating material, preferably polyurethane or perlite.
According to an embodiment of the invention, the tank further comprises a filling port arranged at the top of the tank, said filling port communicating with the annular space.
The invention does not need to adopt the construction mode of the original suspended ceiling structure for prefabrication, but adopts an inner-outer double-layer reticulated shell structure for prefabrication, can effectively improve the construction speed of the storage tank, and reduces the design height of the storage tank by obviously reducing the influence of the shaking wave height on the height of the storage tank. Because the suspended ceiling is cancelled, cold insulation glass wool on the upper portion of the suspended ceiling also does not need to be arranged, the suspended ceiling can be replaced by a PUF (physical unclonable function) with a more ideal cold insulation effect, and the problem of perlite settlement of the ring beam position of the original storage tank is avoided. Or, the LNG tank top structure provided with the filling port can be adopted, so that the material can be conveniently filled into the annular space of the storage tank when the heat insulation material is settled, and the heat insulation effect of the storage tank is not influenced.
Drawings
Fig. 1 is a schematic view of an overall structure of a conventional LNG storage tank;
fig. 2 is a schematic installation diagram of an LNG tank top structure of an LNG storage tank according to an embodiment of the present invention;
fig. 3 is a schematic view of a cold insulation structure of an LNG storage tank according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a latticed shell structure according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a half-sectional structure of an anti-compression ring and an anti-compression ring according to an embodiment of the invention;
reference numerals:
1 inner tank, 2 outer tanks, 3 temporary connecting pieces, 4 outer tank domes, 5 inner tank domes, 6 outer tank connecting parts, 61 compression ring, 62 compression ring, 7 inner tank connecting parts, 8 cold insulation materials, 9 filling ports, 11 suspended ceilings, 12 suspended ceiling glass wool, 13 suspenders, 14 perlite, 15 lining plates, 16 ring beams and 17 longitudinal beams.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.
The invention adopts a novel storage tank design and construction technology, does not need to adopt the construction mode of the original suspended ceiling structure for prefabrication, adopts an inner-outer double-layer reticulated shell structure for prefabrication, can effectively improve the construction speed of the storage tank, and reduces the design height of the storage tank by obviously reducing the influence of the shaking wave height on the height of the storage tank. Because the suspended ceiling is cancelled, cold insulation glass wool on the upper portion of the suspended ceiling also does not need to be arranged, the suspended ceiling can be replaced by a PUF (physical unclonable function) with a more ideal cold insulation effect, and the problem of perlite settlement of the ring beam position of the original storage tank is avoided.
As shown in fig. 2, the present invention first proposes an LNG tank deck structure including an outer tank dome 4 and an inner tank dome 5, wherein,
the outer tank dome 4 is arched, the outer tank dome 4 is of a net shell structure, and the outer tank dome is used for being connected with the top of the outer tank 2 of the storage tank;
The tank top of the storage tank is prefabricated in a construction mode that an original inner tank is of a suspended ceiling structure, the inner layer net shell structure and the outer layer net shell structure are adopted for prefabrication, the construction speed of the storage tank can be effectively increased, and the influence of the shaking wave height on the height of the storage tank can be obviously reduced, so that the design height of the storage tank is reduced.
According to the dome structure of the suspended-ceiling-free LNG storage tank, the inner tank is of the latticed shell type dome structure instead of the traditional suspended ceiling structure, the arched dome reserves enough space for fluctuation of liquid in the inner tank and also reserves space for evaporation pressure of the liquid in the inner tank, the dome is not required to be provided with a pressure balance port and can be connected with the inner tank in a sealing mode, and the strength and rigidity of the arched latticed shell structure can meet the stress requirements of the dome, so that the situation that low-temperature liquid in the storage tank shakes out in an earthquake is avoided, the shaking wave height of the inner tank wall can be reduced, and the overall height of the storage tank is reduced.
As shown in fig. 4, according to one embodiment of the present invention, the lattice shell structure includes a lining plate 15, a ring beam 16 and longitudinal beams 17, the ring beam 16 is circumferentially surrounded in a circumferential direction, the longitudinal beams 17 are radially arranged and connected with the ring beam 16, and the lining plate 15 is connected to the ring beam 16 and the longitudinal beams 17 in a covering manner. The ring beam 16 and the longitudinal beam 17 are provided in plurality. The plurality of ring beams 16 and the plurality of longitudinal beams 17 are respectively distributed at intervals.
Namely, the outer tank dome 4 comprises a dome top layer lining plate, a dome top layer ring beam and a dome top layer longitudinal beam, and the inner tank dome 5 comprises a dome bottom layer lining plate, a dome bottom layer ring beam and a dome bottom layer longitudinal beam.
Preferably, the LNG storage tank dome structure without the suspended ceiling, the outer tank dome 4 is supported due to the load of concrete pouring, the arrangement of ring beams on the top layer of the dome can be more dense, the arrangement of longitudinal beams can be more compact, the arrangement of the inner tank dome 5 is sparse due to the fact that the inner tank dome only needs to bear the pressure of internal evaporation gas, and the arrangement of the ring beams can be looser and the arrangement of the longitudinal beams can be looser.
According to one embodiment of the invention, the spacing between the plurality of ring beams 16 in the latticed shell structure of the outer tank dome 4 is less than the spacing between the plurality of ring beams 16 in the latticed shell structure of the inner tank dome; the spacing between the plurality of stringers 17 in the latticed shell structure of the outer tank dome 4 is less than the spacing between the plurality of stringers 17 in the latticed shell structure of the inner tank dome 5.
Preferably, in the unlined LNG storage tank dome structure, the outer tank dome 4 and the inner tank dome 5 are manufactured and installed simultaneously before being jacked, and are connected by using temporary connecting pieces.
Preferably, in the unlined LNG storage tank dome structure, the outer tank dome 4 and the inner tank dome 5 are connected through a dome temporary connecting piece, and the installation of the pneumatic lifting top is completed together.
That is, as shown in fig. 2 and 3, in order to lift the outer tank dome 4 and the inner tank dome 5 to the top as a whole after the construction of the outer tank 2 is completed, for example, by means of pneumatic jacking, according to an embodiment of the present invention, the LNG tank top structure further includes a temporary connecting member 3 for temporarily connecting the outer tank dome 4 and the inner tank dome 5, that is, the outer tank dome 4 and the inner tank dome 5 are connected together before the installation, the outer tank dome 4 and the outer tank are connected, and the inner tank dome 5 and the inner tank 1 are connected, that is, the temporary connecting member 3 is removed.
Of course, the outer tank dome 4 and the inner tank dome 5 can be separately installed in a lifting way. Namely, after the construction of the outer tank 2 is finished, the outer tank dome 4 is jacked, and after the construction of the inner tank 1 is finished, the inner tank dome 5 is jacked.
The inner tank dome 5 and the outer tank dome 4 are usually made of metal with sufficient strength and rigidity, for example, steel is usually used for building, and a certain low-temperature impact toughness is required for the steel used for the inner tank dome 5.
Preferably, in the suspended-ceiling-free LNG storage tank dome structure, the outer tank dome 4 and the inner tank dome 5 are connected through the dome temporary connecting piece 3, the temporary connecting piece 3 is cut off after the top lifting is completed, the inner tank dome and the inner tank are sealed, preferably, the inner tank dome and the inner tank are connected in a welding mode, and the outer tank dome and the outer tank are connected in a sealing mode. Because the inner tank is generally steel structure, and the outer tank is concrete structure, therefore outer tank can pre-buried steel connecting portion be connected with outer tank dome 4.
Preferably, the temporary connection 3 is a set of connection rods, and the temporary connection 3 is connected between the inner bottom surface of the outer tank dome 4 and the outer top surface of the inner tank dome 5.
As shown in fig. 2 and 3, according to an embodiment of the present invention, the LNG tank deck structure further includes an outer tank connecting portion 6 and an inner tank connecting portion 7, wherein the outer tank connecting portion 6 is used for connecting the outer tank 2 and the outer tank dome 4 of the storage tank, and the inner tank connecting portion 7 is used for connecting the inner tank 1 and the inner tank dome 5 of the storage tank.
According to an embodiment of the present invention, after the dome temporary connecting members 3 are cut off, the outer tank dome 4 and the inner tank dome 5 are completely separated, the outer tank dome can transmit load through the concrete outer tank connecting part 6, the integral structure is supported by the outer tank, the inner tank dome 5 can transmit load through the steel inner tank connecting part 7, and the integral structure is supported by the steel inner tank 1.
According to an embodiment of the present invention, the concrete outer tank connecting part 6 may include a compression ring 61 and a compression ring 62, as shown in fig. 5, which is a semi-sectional schematic view of the compression ring 61 and the compression ring 62. Compression ring 61 and compression ring 62 may be of carbon steel construction. The compression resistant rings 61 and 62 may be connected to the concrete of the outer tank 2 and outer tank dome 4 by carbon steel studs. The compression resistant ring 61 and the compression resistant ring 62 are both of a circumferential structure and are wound around the circumference of the top of the tank body for one circle. The compression ring 61 and compression ring 62 are cross-connected at the junction of the can and dome.
According to one embodiment of the invention the steel inner vessel connection 7 comprises an inner vessel compression ring and a compression ring. The structural form of the group of compression rings is similar to that of the compression rings 61 and 62 of the outer tank connecting part 6, and the compression rings can be made of steel.
Preferably, the structure of the dome of the unlit LNG storage tank: the pressure receiving area of the inner tank connecting part 7 and the outer tank connecting part 6 satisfies
Wherein P is the internal pressure of the storage tank, R is the radius of the inner tank wall or the outer tank wall, Sc is the allowable compressive stress of the steel, and theta is the slope angle of the compression resistant ring.
The invention further provides a storage tank which comprises an inner tank 1, an outer tank 2 and the LNG tank top structure, wherein the outer tank 2 is arranged outside the inner tank 1, the tank top of the inner tank 1 is connected with the inner tank dome 5 in a sealing mode, and the tank top of the outer tank 2 is connected with the outer tank dome 4 in a sealing mode.
According to an embodiment of the invention, the storage tank further comprises an annular space between the inner tank and the outer tank, the annular space being filled with a heat insulating material.
According to an embodiment of the present invention, in the structure of the dome of the unlined LNG storage tank, the outer tank dome 4, the outer tank connecting part 6 and the outer tank 2 are integrally formed outside the storage tank, the inner tank dome 5, the inner tank connecting part 7 and the inner tank 1 are integrally formed inside the storage tank, and a closed annular space is formed between the inside and the outside of the storage tank.
Preferably, the annular space is filled with a PUF (polyurethane) or perlite cold insulation material.
According to one embodiment of the invention, as shown in fig. 3, the tank further comprises a filling port 9, said filling port 9 being arranged at the top of the tank, the filling port 9 communicating with said annular space so as to enable timely filling after the insulation material has settled.
When the PUF is filled in the annular space between the inside and the outside of the storage tank, the PUF elastomer is directly bonded on the tank wall and the tank top, and the problem of perlite (powder) sedimentation is not involved; when filling pearlite (powder) between the annular space between the inside and outside of storage tank, pearlite is filled mouthful 9 and is set up in the storage tank top, fills back annular space and will be full of the pearlite completely, can suitably mend after the storage tank precooling and fill, can avoid the problem that the pearlite later stage subsides.
According to the technical scheme, due to the design of no suspended ceiling and glass wool, perlite or PUF can be adopted for cold insulation in annular spaces outside a dome and a tank wall, so that the problem of later-stage settlement of a heat insulation material is avoided; and adopt arch net shell dome structure, can reserve sufficient space of rocking and stepping up, can avoid liquid to spill over the inner tank outside, can reduce the inner tank height of storage tank and the whole height of storage tank, not only reduced the steel sheet quantity of inner tank, moreover because the storage tank has reduced highly can reduce the whole material quantity of storage tank, like the use amount of concrete, reinforcing bar, prestressing force system, cold insulation material etc.. And because the strength and rigidity of the latticed shell structure are enough, the latticed shell structure does not need to be hung and connected with the tank top of the outer tank, so that the tank top structure of the storage tank can be separated, and the manufacture and construction are simpler and more flexible. From the total cost, the scheme has lower cost than the conventional suspended ceiling such as an aluminum suspended ceiling scheme, and the cold insulation effect is more excellent because the heat insulation material such as perlite powder is not caused to be settled.
Examples
As shown in fig. 2, the integral structure of the storage tank is composed of an inner tank 1 and an outer tank 2, the upper part of the inner tank 1 is not provided with a ceiling structure, but is provided with an inner tank dome 5, and after the construction of the outer tank 2 is completed, the inner tank dome 5 can be connected with an outer tank dome 4 through a dome temporary connecting piece 3 during the installation. During construction, the outer tank dome 4 and the inner tank dome 5 are lifted to the top of the storage tank together by upward gas pressure through the gas pressure jack. After the top is lifted, the temporary dome connecting piece 3 is cut off, the inner tank dome 5 can be welded with the inner tank 1 through the inner tank connecting part 7, and the outer tank dome 4 can be connected with the outer tank 2 through the outer tank connecting part 6.
The annular space between the inner tank 1 and the outer tank 2 is filled with cold insulation material (PUF or perlite) 8, if the cold insulation material 8 is PUF, PUF elastomer is directly bonded on the tank wall and the tank top, and the problem of settlement cannot be caused; when the material 8 adopts the pearlite as cold insulation material, the pearlite is filled the mouth 9 and is located the storage tank top, and the annular space will be full of cold insulation material 8 completely between inner tank 1 and the outer jar 2 after filling, and can fill up through pearlite filling mouth 9 after the storage tank precooling, fully avoid the problem that cold insulation material 8 later stage subsides.
There is not the furred ceiling structure on 1 upper portion of inner tank and directly makes inner tank dome 5 and inner tank 1 weld through inner tank connecting portion 7 for the inner tank forms a confined structure. Therefore, the cryogenic liquid in the inner tank 1 sloshes under the action of earthquake and cannot overflow the outside of the inner tank 1 to enter the outer tank 2, because the cryogenic liquid is blocked by the inner tank dome 5. When the inner tank 1 is designed, the factors are comprehensively considered, and the height of the inner tank 1 is reduced, so that the overall height of the storage tank is reduced, and the cost of the storage tank is saved.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing embodiments are merely illustrative of the present invention, and various components and devices of the embodiments may be changed or eliminated as desired, not all components shown in the drawings are necessarily required, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, and all equivalent changes and modifications based on the technical solutions of the present invention should not be excluded from the scope of the present invention.
Claims (10)
1. An LNG tank deck structure, comprising an outer tank dome and an inner tank dome, wherein,
the outer tank dome is arched and is of a net shell structure, and the outer tank dome is used for being connected with the top of an outer tank of the storage tank;
the inner tank dome is arched, is of a net shell structure and is used for being connected with the top of the inner tank of the storage tank.
2. The LNG tank deck structure according to claim 1, wherein the lattice shell structure comprises lining plates, ring beams and longitudinal beams, the ring beams circumferentially surround in a circumferential direction, the longitudinal beams are arranged in a radial direction and connected with the ring beams, and the lining plates are connected to the ring beams and the longitudinal beams in a covering manner; the ring beam and the longitudinal beam are provided with a plurality of parts.
3. The LNG tank deck structure of claim 2, wherein a spacing between the plurality of ring beams in the lattice structure of the outer tank dome is smaller than a spacing between the plurality of ring beams in the lattice structure of the inner tank dome; the interval between the plurality of longitudinal beams in the latticed shell structure of the outer tank dome is smaller than the interval between the plurality of longitudinal beams in the latticed shell structure of the inner tank dome.
4. The LNG tank deck structure according to any one of claims 1 to 3, further comprising a temporary connection for temporarily connecting the outer tank dome and the inner tank dome, preferably a set of connecting rods, which are connected between the inner bottom surface of the outer tank dome and the outer top surface of the inner tank dome.
5. The LNG tank deck structure of any of claims 1 to 3, further comprising outer tank connection portions for connecting outer tanks of the storage tank and the outer tank dome, and inner tank connection portions for connecting inner tanks of the storage tank and the inner tank dome.
6. The LNG tank deck structure of claim 5, wherein the outer tank connection portion and the inner tank connection portion each comprise a crush ring and a crush ring connected, wherein the crush ring is connected with a tank wall of the outer tank or the inner tank, and the crush ring is connected with the outer tank dome or the inner tank dome.
7. The LNG tank top structure of claim 5, wherein the pressure-receiving areas of the inner tank connection part and the outer tank connection part each satisfy
Wherein P is the internal pressure of storage tank, R is the inner tank or outer jar wall radius of storage tank, Sc is the allowable compressive stress of material of storage tank, theta is the anti-compression ring slope angle of storage tank.
8. A storage tank, comprising an inner tank, an outer tank and an LNG tank deck structure as claimed in any one of claims 1 to 7, the outer tank being disposed outside the inner tank, the tank deck of the inner tank being sealingly connected to the inner tank dome, and the tank deck of the outer tank being sealingly connected to the outer tank dome.
9. The storage tank of claim 8, further comprising an annular space between the inner and outer tanks, the annular space being filled with an insulating material, preferably polyurethane or perlite.
10. The storage tank of claim 8 or 9, further comprising a fill port disposed at a top portion of the storage tank, the fill port communicating with the annular space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677475.XA CN111692515A (en) | 2020-07-14 | 2020-07-14 | LNG storage tank and LNG tank deck structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677475.XA CN111692515A (en) | 2020-07-14 | 2020-07-14 | LNG storage tank and LNG tank deck structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111692515A true CN111692515A (en) | 2020-09-22 |
Family
ID=72486000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010677475.XA Pending CN111692515A (en) | 2020-07-14 | 2020-07-14 | LNG storage tank and LNG tank deck structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111692515A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961383A (en) * | 2022-06-28 | 2022-08-30 | 中国建筑一局(集团)有限公司 | Anti-falling structure for steel dome gas jacking construction of ultralow-temperature LNG storage tank and construction method |
| RU2808871C1 (en) * | 2022-06-28 | 2023-12-05 | Чайна Констракшен Фэрст Груп Корпорейшен Лимитед | Safety structure for lifting steel dome of ultra-low temperature liquefied natural gas storage tank using pneumatic jack and method for lifting using pneumatic jack |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202171122U (en) * | 2011-04-08 | 2012-03-21 | 陈威 | Double-curvature steel inner tank body and cold insulation structure of large LNG storage tank |
| DE102011000492A1 (en) * | 2011-02-03 | 2012-08-09 | Samson Ag | Liquefied gas tank with a power supply device for electrical equipment and method for generating electricity of an electrical device |
| CN203336216U (en) * | 2013-05-18 | 2013-12-11 | 泉州市燃气有限公司 | Cold-insulating storage tank |
| CN203431478U (en) * | 2013-08-09 | 2014-02-12 | 荆门宏图特种飞行器制造有限公司 | Low-temperature liquid storage tank |
| CN107237976A (en) * | 2016-12-29 | 2017-10-10 | 荆门宏图特种飞行器制造有限公司 | Metal full appearance tank |
| CN210532068U (en) * | 2019-08-14 | 2020-05-15 | 重庆飞航铝业有限公司 | Assembled aluminium furred ceiling of liquid oxygen low temperature storage tank |
| CN212617593U (en) * | 2020-07-14 | 2021-02-26 | 中海石油气电集团有限责任公司 | LNG storage tank and LNG tank deck structure |
-
2020
- 2020-07-14 CN CN202010677475.XA patent/CN111692515A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011000492A1 (en) * | 2011-02-03 | 2012-08-09 | Samson Ag | Liquefied gas tank with a power supply device for electrical equipment and method for generating electricity of an electrical device |
| CN202171122U (en) * | 2011-04-08 | 2012-03-21 | 陈威 | Double-curvature steel inner tank body and cold insulation structure of large LNG storage tank |
| CN203336216U (en) * | 2013-05-18 | 2013-12-11 | 泉州市燃气有限公司 | Cold-insulating storage tank |
| CN203431478U (en) * | 2013-08-09 | 2014-02-12 | 荆门宏图特种飞行器制造有限公司 | Low-temperature liquid storage tank |
| CN107237976A (en) * | 2016-12-29 | 2017-10-10 | 荆门宏图特种飞行器制造有限公司 | Metal full appearance tank |
| CN210532068U (en) * | 2019-08-14 | 2020-05-15 | 重庆飞航铝业有限公司 | Assembled aluminium furred ceiling of liquid oxygen low temperature storage tank |
| CN212617593U (en) * | 2020-07-14 | 2021-02-26 | 中海石油气电集团有限责任公司 | LNG storage tank and LNG tank deck structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961383A (en) * | 2022-06-28 | 2022-08-30 | 中国建筑一局(集团)有限公司 | Anti-falling structure for steel dome gas jacking construction of ultralow-temperature LNG storage tank and construction method |
| RU2808871C1 (en) * | 2022-06-28 | 2023-12-05 | Чайна Констракшен Фэрст Груп Корпорейшен Лимитед | Safety structure for lifting steel dome of ultra-low temperature liquefied natural gas storage tank using pneumatic jack and method for lifting using pneumatic jack |
| CN114961383B (en) * | 2022-06-28 | 2024-02-27 | 中国建筑一局(集团)有限公司 | Anti-falling structure for steel dome gas jacking construction of ultralow-temperature LNG storage tank and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2387685B1 (en) | Cryogenic liquid storage tank | |
| US9726326B2 (en) | Method of constructing a storage tank for cryogenic liquids | |
| US2777295A (en) | Concrete reservoir for liquefied gases | |
| CN212617593U (en) | LNG storage tank and LNG tank deck structure | |
| JPS6242198B2 (en) | ||
| CN104704180A (en) | Method for constructing cylindrical tank | |
| JP2008503702A (en) | Tank for fluid storage, preferably cryogenic fluid | |
| WO2006046872A1 (en) | Tank for storage of lng or other cryogenic fluids | |
| CN102003095B (en) | Housing of large-scale liquefied natural gas storage tank and construction method thereof | |
| AU2013253963B2 (en) | Free-standing liner unit and method for building tank | |
| RU2307973C2 (en) | Reservoir for storing cryogenic fluid medium and method of manufacture of hermetically sealed reservoir | |
| CN104769196A (en) | Method for constructing cylindrical tank | |
| Yang et al. | Development of the world’s largest above-ground full containment LNG storage tank | |
| CN111692515A (en) | LNG storage tank and LNG tank deck structure | |
| JP4567287B2 (en) | Vertical double-shell cylindrical cryogenic storage tank | |
| MX2014014908A (en) | Modular foundation resistant to ground movement. | |
| US4344264A (en) | Flexible corner seal structure for cryogenic container | |
| US3025993A (en) | Anchor system | |
| CN113293789B (en) | Rigidly-connected LNG storage tank foundation double-bearing platform structure and manufacturing method thereof | |
| US3562986A (en) | Liquid storage container | |
| US3488972A (en) | Cryogenic storage structure | |
| WO2023127606A1 (en) | Triple-shell tank | |
| WO2023248480A1 (en) | Low-temperature liquefied gas storage tank | |
| JP2007162772A (en) | Outer vessel bottom plate construction of vertical type thermal insulation low-temperature tank | |
| CN216689471U (en) | Sunken bearing platform suitable for land low temperature film storage tank system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |