CN112963726A - Large LNG storage tank provided with vertical-circumferential partition plates - Google Patents
Large LNG storage tank provided with vertical-circumferential partition plates Download PDFInfo
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- CN112963726A CN112963726A CN202110434601.3A CN202110434601A CN112963726A CN 112963726 A CN112963726 A CN 112963726A CN 202110434601 A CN202110434601 A CN 202110434601A CN 112963726 A CN112963726 A CN 112963726A
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- partition plate
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- 238000003860 storage Methods 0.000 title claims abstract description 64
- 238000005192 partition Methods 0.000 title claims abstract description 42
- 238000009413 insulation Methods 0.000 claims description 5
- 239000011490 mineral wool Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000013016 damping Methods 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 239000011513 prestressed concrete Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
- F17C3/04—Vessels not under pressure with provision for thermal insulation by insulating layers
- F17C3/06—Vessels not under pressure with provision for thermal insulation by insulating layers on the inner surface, i.e. in contact with the stored fluid
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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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/08—Mounting arrangements for vessels
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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
- F17C2201/0104—Shape cylindrical
- F17C2201/0119—Shape cylindrical with flat end-piece
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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
-
- 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
- F17C2203/0345—Fibres
Abstract
The invention provides a large LNG storage tank provided with vertical-circumferential partition plates, and belongs to the field of civil engineering. The vertical partition plate is of an L-shaped structure, the vertical part of the vertical partition plate is welded on the side wall of the inner tank of the storage tank, and the horizontal part of the vertical partition plate is welded on the bottom plate. The circumferential partition plate is welded on the side wall of the inner tank of the storage tank and is welded with the vertical partition plate of the side wall. According to the invention, the vertical-annular partition plate is arranged on the inner tank of the storage tank, so that the structural rigidity can be increased, the stress is effectively reduced, the liquid sloshing is reduced, the dynamic water pressure is reduced, and the overall safety of the large-scale LNG storage tank structure is greatly improved. The storage tank has the advantages of wide application, low manufacturing cost, easy construction and the like, and is suitable for being widely popularized and applied in the industry.
Description
Technical Field
The invention belongs to the field of civil engineering, and relates to a large LNG storage tank provided with a vertical-annular partition plate, which is suitable for vibration reduction control of an engineering structure.
Background
As LNG becomes more widely used, LNG storage tanks are receiving more and more attention as the primary equipment of city life lines. The construction scale of the storage tank is gradually increased, the volume of a large-scale LNG storage tank in the counties reaches 20 thousands of cubes, and the increase of the volume also brings about some potential safety hazards. Particularly, under the action of earthquake, the storage tank is easy to be damaged, and secondary disasters such as fire, explosion, environmental pollution and the like are caused. Therefore, the structural safety problem of the LNG storage tank is highly valued by people, and the anti-seismic research has important significance.
The damping technology of the structure of the LNG storage tank is to design a new storage tank structure form or arrange energy dissipation (damping) devices at certain parts of a structure to dissipate or absorb energy input into the structure from external force, earthquake action or wind load and the like so as to reduce the earthquake reaction of a main body structure, thereby avoiding the structure from being damaged or collapsed and achieving the purpose of damping control. Compared with traditional buildings such as houses and bridges, the LNG storage tank is filled with a large amount of liquid, and the problem of fluid-solid coupling is involved, and the problem of fluid-solid coupling is a research hotspot and difficulty at present. In the past, a study on a large-scale LNG storage tank is carried out by a scholars in journal of university of maritime affairs, namely Total-volume LNG storage tank base isolation. Although the foundation isolation can effectively reduce the overturning moment and the shearing force of the base and reduce the possibility of buckling at the lower part of the tank wall, the foundation isolation can generate larger shaking wave height, so that the upper part of the tank wall of the storage tank is buckled, the top is blocked and the like. According to the LNG storage tank with the brand-new structure, the vertical-annular partition plates are arranged in the storage tank, so that the overall safety of the structure is improved, the possibility of lifting off of the bottom plate and buckling of the lower part of the bottom plate is reduced, the shaking wave height is reduced, and the impact of liquid on the wall plate is reduced.
Disclosure of Invention
The present invention aims to provide a shock-absorbing large-sized LNG storage tank as the most important equipment of LNG receiving stations and factories. Firstly, the structure can be reinforced without affecting the internal space arrangement and use of the building; secondly, under the action of external load, the integral rigidity of the structure is improved, the stress is effectively reduced, and the displacement is reduced; finally, the partition plate effectively reduces violent liquid sloshing and unfavorable hydraulic pressure, so that the energy dissipation and shock absorption effects of the large LNG storage tank are realized, and the safety of the storage tank is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a large LNG storage tank provided with vertical-annular partition plates comprises prestressed concrete 1, a heat insulation layer 2, an inner tank 3, a bearing platform 4, vertical partition plates 5 and annular partition plates 6; the prestressed concrete 1 is arranged on the outermost layer of the storage tank, and the heat insulation between the prestressed concrete 1 and the inner tank 3 is carried out through the heat insulation layer 2; the outer tank 1, the heat-insulating layer 2 and the inner tank 3 are built on a bearing platform 4, and the bearing platform 4 is made of reinforced concrete. The invention adds a vertical clapboard 5 and a circumferential clapboard 6 on the basis of the prior storage tank.
The vertical clapboard 5 is of an L-shaped structure and comprises a vertical part and a horizontal part; the vertical part is welded on the side wall of the inner tank 3 of the storage tank, and the horizontal part is welded on the bottom plate. The annular partition plate 6 is arranged inside the storage tank, welded on the side wall of the inner tank of the storage tank and welded with the vertical partition plate 5 of the side wall. After vertical baffle 5, hoop baffle 6 are add in the storage tank, can reduce LNG storage tank displacement, increase structural rigidity, the damping when can increase liquid and rock simultaneously reduces and moves the water pressure reinforce.
The following are technical limitations of the vertical 5 and circumferential 6 baffles:
if the height of the LNG storage tank is Lm and the diameter of the bottom plate of the LNG storage tank is D m, then: the height of the annular partition plates 6 is arranged along the height direction of the storage tank, and the interval between every two annular partition plates is 0.05L-0.2L m; wherein, the distance between the lowest annular partition plate 6 and the inner tank bottom plate is 0.05L-0.1L m. The annular width of the annular partition plate 6 is 0.03D-0.08Dm, namely the ratio of the annular width to the diameter of the annular bottom plate is 3-8%, and experiments show that when the ratio is 3-8%, the integral rigidity of the structure is improved, and the liquid sloshing height is reduced. The length of the horizontal part of the vertical partition plate 5 is 0.03D-0.08D m.
The thickness of the vertical partition plate 5 and the circumferential partition plate 6 is equal to that of the bottom 3 of the inner tank. The height of the vertical part of the vertical clapboard 5 is equal to the height of the inner tank, the vertical part and the inner tank are arranged along the circumferential direction of the tank body of the storage tank, and the radian between every two vertical parts is 10-50 degrees.
Furthermore, the heat-insulating layer 2 is made of a new material rock wool board instead of the original expanded perlite. Compared with expanded perlite, the rock wool has better heat insulation property and is beneficial to heat preservation of the LNG storage tank; secondly, the heat preservation in-process is filled to the pearlite inevitably has the space to produce, because the pearlite granule is little, and the shape is irregular, and in the storage tank vibrations process, the mutual extrusion of pearlite and ectonexine probably causes local stress too big. But rock wool is closely knit, and it is higher to connect the laminating degree with inside and outside jar, can avoid the above-mentioned problem that appears, and the security performance is higher. The inner tank is made of 9% Ni steel, has good low-temperature resistance and good welding performance, and has low sensitivity to cold cracks.
Compared with the prior art, the invention has the beneficial effects that:
(1) under the action of earthquake, the bottom of the large LNG storage tank has large stress, and the liquid is violently shaken. According to the invention, the vertical-annular partition plate is arranged on the inner tank of the storage tank, so that the displacement of the large LNG storage tank can be reduced, the structural rigidity is increased, the stress is effectively reduced, the damping during liquid sloshing is increased, the adverse harm caused by severe liquid sloshing is avoided, namely the severe liquid sloshing can be reduced, and the dynamic water pressure is reduced, so that the large LNG storage tank can run more safely and stably.
(2) The LNG storage tank heat preservation adopts new material rock wool board, and the heat-proof quality is better, does benefit to the heat preservation of LNG storage tank.
(3) The large-scale LNG storage tank has the advantages of wide storage tank application, low manufacturing cost, easiness in construction, simplicity in installation, stability in operation and the like, and is efficient in energy consumption.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a front view of the present invention;
FIG. 3 is a top view of the present invention;
fig. 4 is a cross-sectional view of the present invention taken along line a-a of fig. 1.
In the figure: 1, prestressed concrete; 2, insulating layer; 3, inner tank; 4, bearing platforms; 5, vertical partition boards; 6 ring towards the spacer.
Detailed Description
The present invention is further illustrated by the following specific examples.
Comparative example
The diameter of the existing large LNG storage tank is 600mm, the height is 500mm, and the liquid filled in the large LNG storage tank is 300mm high. The inner diameter of the outer tank 1 is 82m, the wall height is 38.55m, and the thickness of concrete is 0.8 m; the thickness of the heat-insulating layer 2 is 1 m; the inner tank 3 has a radius of 40.2m, a height of 35.43m and a bottom thickness of 24.9 mm.
And (3) carrying out a vibration table experiment on the storage tank, applying seismic waves to load the structure, wherein the peak acceleration is 0.07g, and the dynamic water pressure is 0.26KPa, the wave height is 130.84mm, the strain is 21.22 mu epsilon and the displacement is 0.038mm are respectively measured through a sensor.
Examples of the invention
Add vertical baffle 5, hoop baffle 6 on the structure basis of above-mentioned comparative example LNG storage tank: the height of the vertical part of the vertical clapboard 5 is 500mm, the radian between every two vertical clapboard 5 is 45 degrees, and the length of the horizontal part of the vertical clapboard 5 is 0.02 m. The width of the ring of the annular clapboard 6 is 0.02m, and the distance between every two is 0.1 m. The vertical partition plate 5 arranged inside the storage tank is fixedly connected to the side wall and the bottom plate of the storage tank inner tank, the annular partition plate 6 arranged inside the storage tank is fixedly connected to the side wall of the storage tank inner tank, and the vertical partition plate 5 and the annular partition plate 6 are fixedly connected.
And (3) adopting the same experimental conditions as the comparative examples to carry out a vibration table test, and applying seismic waves to load the structure, wherein the peak acceleration is 0.07 g. The dynamic water pressure of 0.21KPa, the wave height of 96.78mm, the strain of 14.85 mu epsilon and the displacement of 0.028mm are respectively measured by a sensor.
By analyzing the test data of the comparative examples and examples, it can be seen that: vertical baffle 5 on the storage tank, hoop baffle 6 improve the whole safety of storage tank structure greatly. Under the action of earthquake, the integral rigidity of the structure is improved, the displacement is reduced, and the stress is reduced; meanwhile, the baffle plate increases the damping of liquid sloshing, effectively reduces the liquid sloshing wave height, reduces the unfavorable hydraulic pressure, reduces the amplitude by 10-30% according to different parameters, and has obvious damping effect on the vertical and annular baffle plates, thereby achieving the effect of energy dissipation and damping of the storage tank.
The problem that current large-scale LNG storage tank structure power consumption ability is not enough can be solved to this embodiment, makes fluid potential function no longer continuous through vertical and annular baffle promptly, and the damping of liquid sloshing increases, and energy dissipation has improved power consumption shock attenuation effect greatly, improves the bulk rigidity of structure simultaneously, promotes structure safety.
The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the invention patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.
Claims (4)
1. A large LNG storage tank provided with vertical-annular partition plates is characterized by further comprising vertical partition plates (5) and annular partition plates (6);
the vertical partition plate (5) is of an L-shaped structure and comprises a vertical part and a horizontal part; the vertical parts are welded on the side wall of the inner tank (3) of the storage tank and are uniformly arranged along the circumferential direction of the tank body of the storage tank, and the horizontal parts are welded on the bottom plate; the circumferential partition plates (6) are uniformly welded on the side wall of the inner tank of the storage tank and are welded with the vertical partition plates (5) on the side wall; the thickness of the vertical partition plate (5) and the circumferential partition plate (6) is equal to the thickness of the bottom of the inner tank;
if the height of the LNG storage tank is Lm and the tank bottom plate diameter is D m, then: the interval between two adjacent annular partition plates (6) is 0.05L-0.2L m; wherein, the distance between the lowest circumferential clapboard (6) and the inner tank bottom plate is 0.05L-0.1L m; the radian between two adjacent vertical partition plates (5) is 10-50 degrees.
2. A large LNG tank with vertical-to-circumferential baffles according to claim 1, characterized in that the circumferential baffles (6) have a ring width of 0.03D-0.08 Dm.
3. Large LNG tank with vertical-to-circumferential partitions, according to claim 1, characterized in that the vertical partition (5) has a horizontal part length of 0.03D-0.08D m.
4. A large LNG tank with vertical-to-circumferential baffles according to claim 1, characterized in that the insulation (2) is made of rock wool panels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110434601.3A CN112963726A (en) | 2021-04-22 | 2021-04-22 | Large LNG storage tank provided with vertical-circumferential partition plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110434601.3A CN112963726A (en) | 2021-04-22 | 2021-04-22 | Large LNG storage tank provided with vertical-circumferential partition plates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112963726A true CN112963726A (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110434601.3A Pending CN112963726A (en) | 2021-04-22 | 2021-04-22 | Large LNG storage tank provided with vertical-circumferential partition plates |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014799A (en) * | 2004-06-25 | 2007-08-08 | 挪威船级社 | Tank for storing of fluid, preferably for fluids at low temperatures |
| US20080099489A1 (en) * | 2006-10-26 | 2008-05-01 | Altair Engineering, Inc. | Storage tank containment system |
| CN103707998A (en) * | 2014-01-06 | 2014-04-09 | 大连理工大学 | Damping type oscillation prevention cabin wall for independent C-type cargo hold of LNG injection ship |
| KR20150074661A (en) * | 2013-12-24 | 2015-07-02 | 주식회사 포스코 | Tank for storing fluid |
| US20150260339A1 (en) * | 2012-11-08 | 2015-09-17 | Korea Advanced Institute Of Science And Technology | X-beam structure and pressure tank having x-beam structure |
| US20160356420A1 (en) * | 2011-04-25 | 2016-12-08 | Korea Advanced Institute Of Science And Technology | Prismatic pressure tank having lattice structure |
| US20180229863A1 (en) * | 2016-12-12 | 2018-08-16 | The Boeing Company | Additively manufactured reinforced structure |
| CN109850422A (en) * | 2019-04-09 | 2019-06-07 | 大连理工大学 | There are center column type fluid reservoir and its force calculation method with annulus cylindricality energy dissipating layer |
| CN109956142A (en) * | 2019-04-09 | 2019-07-02 | 大连理工大学 | A kind of liquid reserve tank and its numerical computation method of band filling cylinder energy-dissipating structure |
-
2021
- 2021-04-22 CN CN202110434601.3A patent/CN112963726A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101014799A (en) * | 2004-06-25 | 2007-08-08 | 挪威船级社 | Tank for storing of fluid, preferably for fluids at low temperatures |
| US20080099489A1 (en) * | 2006-10-26 | 2008-05-01 | Altair Engineering, Inc. | Storage tank containment system |
| US20160356420A1 (en) * | 2011-04-25 | 2016-12-08 | Korea Advanced Institute Of Science And Technology | Prismatic pressure tank having lattice structure |
| US20150260339A1 (en) * | 2012-11-08 | 2015-09-17 | Korea Advanced Institute Of Science And Technology | X-beam structure and pressure tank having x-beam structure |
| KR20150074661A (en) * | 2013-12-24 | 2015-07-02 | 주식회사 포스코 | Tank for storing fluid |
| CN103707998A (en) * | 2014-01-06 | 2014-04-09 | 大连理工大学 | Damping type oscillation prevention cabin wall for independent C-type cargo hold of LNG injection ship |
| US20180229863A1 (en) * | 2016-12-12 | 2018-08-16 | The Boeing Company | Additively manufactured reinforced structure |
| CN109850422A (en) * | 2019-04-09 | 2019-06-07 | 大连理工大学 | There are center column type fluid reservoir and its force calculation method with annulus cylindricality energy dissipating layer |
| CN109956142A (en) * | 2019-04-09 | 2019-07-02 | 大连理工大学 | A kind of liquid reserve tank and its numerical computation method of band filling cylinder energy-dissipating structure |
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