Box-type full-capacity storage tank of LNG gravity type concrete receiving terminal

Abstract

The invention discloses a box-type full-capacity storage tank of an LNG gravity type concrete receiving terminal, the box-type full-capacity storage tank of the LNG gravity type concrete receiving terminal comprises a concrete base and a plurality of concrete side walls, the plurality of concrete side walls are arranged on the concrete base, the plurality of concrete side walls are sequentially connected to form a rectangle, and the concrete side walls are arranged on the concrete base. A concrete top plate is arranged on the concrete side wall, so that the whole body is arranged in a box shape; an inner tank is arranged on the concrete base, liquefied natural gas is stored in the inner tank, and a cold insulation structure is arranged between the inner tank and the concrete base, so that the evaporation capacity of the liquefied natural gas is reduced; and the inner tank is connected with a swash plate, so that the liquefied natural gas is stably stored in the inner tank. According to the box-type full-capacity storage tank of the LNG gravity type concrete receiving terminal, the concrete base, the concrete side walls and the concrete top plate are sequentially connected to form the box-type storage tank, the inner tank is arranged in the box-type storage tank and used for storing liquefied natural gas, and the box-type full-capacity storage tank has good safety, economical efficiency and environmental friendliness.

Description

Technical Field

[0001] The invention belongs to the technical field of marine cryogenic medium storage, and in particular relates to a box-type full-capacity storage tank of an LNG gravity concrete receiving terminal. Background Art

[0002] LNG cools gaseous natural gas to below -162℃ under normal pressure, condensing it into liquid, thereby greatly reducing the volume of storage and transportation and improving the economy and safety of energy transportation. In the LNG industry chain, the receiving terminal is the key link in realizing LNG storage and utilization. As the core equipment of the receiving terminal, the structural design of the storage tank is directly related to the safe storage, efficient utilization and environmental protection of LNG. Most traditional LNG storage tanks use full-capacity above-ground storage tanks or underground membrane storage tanks.

[0003] As LNG land terminals, the above-ground full-containment storage tanks or underground membrane storage tanks still have deficiencies in the safety and reliability of the LNG receiving terminal tank structure in complex marine environments.

[0004] Therefore, it is urgent to design a box-type full-capacity storage tank for an LNG gravity concrete receiving terminal to solve the above-mentioned problems. Summary of the invention

[0005] In order to solve the technical problem mentioned in the background technology that the aboveground full-capacity storage tanks or underground membrane storage tanks still have insufficient safety and reliability as LNG land terminals, a box-type full-capacity storage tank for an LNG gravity concrete receiving terminal is provided to solve the problem of LNG storage.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the box-type full-capacity storage tank of the LNG gravity concrete receiving terminal of the present invention is as follows: A box-type full-capacity storage tank for an LNG gravity concrete receiving terminal comprises a concrete base and a plurality of concrete side walls, wherein the plurality of concrete side walls are arranged on the concrete base, the plurality of concrete side walls are connected in sequence to form a rectangular arrangement, a concrete top plate is arranged on the concrete side walls to form a box-type arrangement as a whole; an inner tank is arranged on the concrete base to store liquefied natural gas, a cold-keeping structure is arranged between the inner tank and the concrete base to reduce the evaporation of the liquefied natural gas; a wave-breaking plate is connected to the inner tank to stably store the liquefied natural gas in the inner tank.

[0007] Furthermore, an airtight structure is connected to the concrete base, and the airtight structure is located between the concrete base and the cold-insulating structure.

[0008] Furthermore, the airtight structure includes a protective layer, a wall steel lining plate and a top steel lining plate, and the protective layer, the wall steel lining plate and the top steel lining plate are connected in sequence to ensure overall airtightness.

[0009] Further, the protective layer is fixedly connected to the concrete base, the wall steel liner is fixedly connected to the concrete side wall, and the top steel liner is fixedly connected below the concrete roof slab.

[0010] Further, the cold insulation structure includes a first cold insulation module and a second cold insulation module. The first cold insulation module is arranged between the concrete base and the protective layer, and the second cold insulation module is arranged between the concrete side wall and the wall steel liner.

[0011] Further, it also includes a hot corner protection, which is arranged at the bottom of the concrete side wall.

[0012] Further, it also includes a protective ceiling, which is connected below the concrete roof slab through a suspension rod, so that a sealed storage space is formed between the protective ceiling and the inner tank.

[0013] Further, the inner tank includes an inner tank bottom plate, inner tank wall plates and stiffening rib plates. The inner tank wall plates are connected to the inner tank bottom plate, and the stiffening rib plates are connected to the outer walls of the inner tank bottom plate and the inner tank wall plates. The inner tank bottom plate is arranged on the first cold insulation module, and a leveling layer is provided between the inner tank bottom plate and the first cold insulation module; the inner tank wall plates are arranged on the second cold insulation module, and the intersection of the inner tank wall plates and the second cold insulation module is set as an arc to reduce local stress concentration.

[0014] Further, the stiffening rib plates include transverse rib plates and longitudinal rib plates, and the transverse rib plates and the longitudinal rib plates are cross-connected to the outer walls of the inner tank wall plates.

[0015] Further, a plurality of anti-wave plates are connected to the inner tank bottom plate. A flow passage is provided at the connection between the anti-wave plate and the inner tank bottom plate to make the liquid level of the liquefied natural gas flat; the side wall of the anti-wave plate is connected to the inner tank wall plate, and rib plates are provided at the connections between the anti-wave plate and the inner tank bottom plate and the inner tank wall plate to fixedly arrange the anti-wave plate.

[0016] The box-type full containment storage tank of the LNG gravity-based concrete receiving terminal of the present invention has the following advantages: The box-type storage tank is formed by sequentially connecting a concrete base, a concrete side wall and a concrete roof slab. An inner tank is arranged inside the box-type storage tank for storing liquefied natural gas, and a cold insulation structure is adopted to reduce the evaporation amount of the liquefied natural gas. The anti-wave plate can make the overall liquid level of the liquefied natural gas in the tank flat. The structure of the full containment storage tank in this application is complete, and it has good safety, economy and environmental protection, meeting the construction requirements of the gravity-based structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional structure diagram of the short side of the box-type full containment storage tank of the LNG gravity-based concrete receiving terminal of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the long side of the box-type full containment storage tank of the LNG gravity-based concrete receiving terminal of the present invention; Figure 3 It is a schematic diagram of the reinforcing rib plate of the inner tank of the box-type full-capacity storage tank of the LNG gravity concrete receiving terminal of the present invention.

[0018] Description of the markings in the figure: 1. Concrete base; 2. Concrete side walls; 3. Concrete top plate; 4. Airtight structure; 41. Protective layer; 42. Wall steel lining; 43. Top steel lining; 5. Cold insulation structure; 51. First cold insulation module; 52. Second cold insulation module; 53. Hot corner protection; 54. Protective ceiling; 541. Hanging rod; 6. Inner tank; 61. Inner tank bottom plate; 62. Inner tank wall plate; 63. Reinforced rib plate; 631. Horizontal rib plate; 632. Longitudinal rib plate; 7. Wave-breaking plate; 8. Flow channel; 9. Rib plate; 10. Leveling layer; 11. Anchor belt. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0021] Please refer to the attached Figure 1 To Attachment Figure 3 The box-type full-containment storage tank of the LNG gravity concrete receiving terminal of the present invention is described.

[0022] like Figure 1 As shown, the box-type full-capacity storage tank of the LNG gravity concrete receiving terminal in the present invention includes a concrete base 1 and multiple concrete side walls 2, the multiple concrete side walls 2 are all arranged on the concrete base 1, the multiple concrete side walls 2 are connected in sequence to form a rectangular arrangement, and a concrete top plate 3 is arranged on the concrete side wall 2 to make the overall box-type arrangement; an inner tank 6 is arranged on the concrete base 1, and liquefied natural gas is stored in the inner tank 6. A cold insulation structure 5 is provided between the inner tank 6 and the concrete base 1 to reduce the evaporation of the liquefied natural gas; a wave-breaking plate 7 is connected to the inner tank 6 to stably store the liquefied natural gas in the inner tank 6.

[0023] The box - type storage tank is formed by sequentially connecting a concrete base 1, a concrete side wall 2, and a concrete top plate 3. An inner tank 6 is arranged inside the box - type storage tank for storing liquefied natural gas, and a cold - insulation structure 5 is used to reduce the evaporation rate of the liquefied natural gas. The anti - wave plate 7 can make the overall liquid level of the liquefied natural gas in the tank flat. The structure of the full - containment storage tank in this application is complete, with good safety, economy, and environmental protection, meeting the construction requirements of the gravity - type structure. Further, as Figure 1 and Figure 2 shown, an airtight structure 4 is connected to the concrete base 1, and the airtight structure 4 is located between the concrete base 1 and the cold - insulation structure 5; the airtight structure 4 includes a protective layer 41, a wall steel liner 42, and a top steel liner 43. The protective layer 41, the wall steel liner 42, and the top steel liner 43 are sequentially connected to ensure the overall airtightness; the protective layer 41 is fixedly connected to the concrete base 1, the wall steel liner 42 is fixedly connected to the concrete side wall 2, and the top steel liner 43 is fixedly connected to the lower part of the concrete top plate 3.

[0024] In this embodiment, the concrete base 1 is a part of the structural cap of the entire LNG gravity - type concrete receiving terminal, and the concrete top plate 3 is a part of the structural top plate of the entire LNG gravity - type concrete receiving terminal; preferably, there is a haunch structure at the connection between the concrete side wall 2 and the concrete top plate 3 to enhance the load - bearing capacity and seismic resistance of the concrete top plate.

[0025] As a preferred embodiment, the concrete outer tank body of this application is a rectangular box, with strong structural rigidity to resist adverse natural external forces such as earthquakes and sea waves, protecting structures such as the steel inner tank 6. The rectangular box structure can better adapt to the offshore gravity - type foundation structure. Moreover, the concrete outer tank body should use low - temperature - resistant steel bars and apply prestress to the concrete side wall to enhance the structural strength of the concrete. The concrete outer tank body structure is preferably made of reactive powder concrete (RPC) to improve the structural strength of the concrete structure.

[0026] Preferably, a tank - bottom protective layer 41, a wall steel liner 42, and a top steel liner 43 are installed inside the concrete outer tank body. The tank - bottom protective layer 41 is fixedly connected to the concrete base 1, the wall steel liner 42 is fixedly connected to the concrete side wall 2, and the top steel liner 43 is fixedly connected to the lower part of the concrete top plate 3.

[0027] The tank - bottom protective layer 41, the wall steel liner 42, and the top steel liner 43 are welded and closed to form the airtight structure 4 of the storage tank, providing good airtight performance for the storage tank.

[0028] Further, as Figure 1As shown in the figure, the cold insulation structure 5 includes a first cold insulation module 51 and a second cold insulation module 52. The first cold insulation module 51 is arranged between the concrete base 1 and the protective layer 41, and the second cold insulation module 52 is arranged between the concrete side wall 2 and the wall steel lining 42. It also includes a hot corner protection 53 which is arranged at the bottom of the concrete side wall 2. It further includes a protective ceiling 54 which is connected below the concrete roof slab 3 through a suspension rod 541, so that a sealed storage space is formed between the protective ceiling 54 and the inner tank 6.

[0029] In this embodiment, a storage tank cold insulation structure 5 is installed in the storage cavity of the concrete outer tank. Among them, the first cold insulation module 51 is a bottom cold insulation structure, and the second cold insulation module 52 is a wall cold insulation structure. The bottom cold insulation structure is fixedly connected to the concrete base and the protective layer 41. A leveling layer 10 is provided on the upper part of the bottom cold insulation structure. The wall cold insulation structure is fixedly connected to the concrete side wall 2 and the wall steel lining 42. The hot corner protection 53 is installed on the concrete base 1.

[0030] The storage tank cold insulation structure plays an adiabatic role for the LNG in the storage tank, reducing the evaporation amount of LNG. The hot corner protection 53 is used to prevent thermal stress concentration in the storage tank under extreme temperature conditions, thereby protecting the safe and stable operation of the storage tank.

[0031] Further, as shown in Figure 1 and Figure 3 the figure, the inner tank 6 includes an inner tank bottom plate 61, an inner tank wall plate 62 and a stiffening rib plate 63. The inner tank wall plate 62 is connected to the inner tank bottom plate 61. The outer walls of the inner tank bottom plate 61 and the inner tank wall plate 62 are connected with the stiffening rib plate 63. The inner tank bottom plate 61 is arranged on the first cold insulation module 51. A leveling layer 10 is provided between the inner tank bottom plate 61 and the first cold insulation module 62. The inner tank wall plate 62 is arranged on the second cold insulation module 52. The intersection of the inner tank wall plate 62 and the second cold insulation module 52 is set as an arc to reduce local stress concentration.

[0032] The stiffening rib plate 63 includes a transverse rib plate 631 and a longitudinal rib plate 632. The transverse rib plate 631 and the longitudinal rib plate 632 are cross-connected on the outer wall of the inner tank wall plate 62. A plurality of anti-wave plates 7 are connected to the inner tank bottom plate 61. A flow passage 8 is provided at the connection of the anti-wave plate 7 and the inner tank bottom plate 61 to make the liquid level of the liquefied natural gas flat. The side wall of the anti-wave plate 7 is connected to the inner tank wall plate 62. A rib plate 9 is provided at the connection of the anti-wave plate 7 with the inner tank bottom plate 61 and the inner tank wall plate 62 to fixedly arrange the anti-wave plate 7.

[0033] In this embodiment, a self-supporting steel inner tank 6 is installed inside the storage tank cold insulation structure 5. The inner tank bottom plate 61 and the inner tank wall plate 62 are fixedly connected with the stiffening rib plate 63 to form the self-supporting steel inner tank 6. The inner tank bottom plate 61 is installed on the upper part of the leveling layer 10. The self-supporting steel inner tank can bear the LNG alone without the outer tank being stressed.

[0034] Preferably, reinforcing rib plates 63 are installed on the outer wall of the self-supporting steel inner tank 6. The reinforcing rib plates 63 are composed of transverse rib plates 631 and longitudinal rib plates 632, which enhance the LNG bearing capacity, anti-buckling and anti-torsion capabilities of the steel inner tank. At the same time, the intersections of the long and short side walls of the inner tank wall plate 62 are arc-connected to reduce local stress concentration. Anchor belts 11 are installed on both sides of the long side of the inner tank bottom plate 61 to enhance the anti-overturning ability of the steel inner tank.

[0035] A wave baffle 7 is installed inside the self-supporting steel inner tank 6. The wave baffle 7 is fixedly connected to the inner tank 6, and a rib plate 9 is provided at the connection. Preferably, an oval flow channel 8 is provided at the connection between the wave baffle 7 and the inner tank bottom plate 61, which can make the overall liquid level of LNG in the tank flat, and the oval flow channel 8 can reduce local stress concentration.

[0036] As a preferred embodiment, the surface of the wave baffle 7 should be treated with reinforcing ribs, and the edge of the wave baffle 7 should be made into a radian to enhance the structural strength of the wave baffle, reduce stress concentration, and improve the structural life. The wave baffle 7 can reduce the LNG fluctuation caused by vibrations such as earthquakes and waves. Inside the steel inner tank 6, a plurality of wave baffles 7 are arranged along the long side direction, and the oval flow channels 8 are arranged not in a straight line.

[0037] A cold insulation ceiling 54 is installed on the upper part of the steel inner tank 6. The cold insulation ceiling 54 is fixedly connected to the lower part of the concrete roof 3 through a suspension rod 541, and a sealed LNG storage space is formed by the cold insulation ceiling 54 and the steel inner tank 6.

[0038] As a preferred embodiment, one or more inner tanks 6 can be installed side by side along the long side inside the LNG gravity concrete receiving terminal according to the size of the receiving terminal. The box-type full containment storage tank based on the LNG gravity concrete receiving terminal is composed of a concrete base 1, a concrete side wall 2, and a concrete roof 3 connected in sequence to form a box-type storage tank. An inner tank is arranged inside the box-type storage tank for storing liquefied natural gas, and a cold insulation structure 5 is used to reduce the evaporation amount of the liquefied natural gas. The overall liquid level of the liquefied natural gas in the tank can be made flat through the wave baffle 7 and the oval flow channel 8. The structure of the full containment storage tank in this application is complete, with good safety, economy, and environmental protection, meeting the construction requirements of the gravity structure.

[0039] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A box-type full-capacity storage tank for an LNG gravity concrete receiving terminal, characterized in that: It includes a concrete base and a plurality of concrete side walls, wherein the plurality of concrete side walls are arranged on the concrete base, the plurality of concrete side walls are sequentially connected to form a rectangular arrangement, and a concrete top plate is arranged on the concrete side walls, so that the whole is arranged in a box shape; An inner tank is arranged on the concrete base, in which liquefied natural gas is stored, and a cold-insulating structure is arranged between the inner tank and the concrete base to reduce the evaporation of the liquefied natural gas; A wave-breaking plate is connected to the inner tank to ensure that the liquefied natural gas is stably stored in the inner tank.

2. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 1 is characterized in that: An airtight structure is connected to the concrete base, and the airtight structure is located between the concrete base and the cold insulation structure.

3. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 2 is characterized in that: The airtight structure includes a protective layer, a wall steel lining plate and a top steel lining plate, and the protective layer, the wall steel lining plate and the top steel lining plate are connected in sequence to ensure the overall airtightness.

4. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 3 is characterized in that: The protective layer is fixedly connected to the concrete base, the wall steel lining is fixedly connected to the concrete side wall, and the top steel lining is fixedly connected to the bottom of the concrete top plate.

5. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 1 is characterized in that: The cold-insulation structure comprises a first cold-insulation module and a second cold-insulation module. The first cold-insulation module is arranged between the concrete base and the protective layer, and the second cold-insulation module is arranged between the concrete side wall and the wall steel lining plate.

6. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 5 is characterized in that: Also included are thermal corner protections, which are provided at the bottom of the concrete side walls.

7. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 5, characterized in that: It also includes a protective suspended ceiling, which is connected below the concrete top plate through a suspension rod so that the protective suspended ceiling and the inner tank form a sealed storage space.

8. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 1, characterized in that: The inner tank includes an inner tank bottom plate, an inner tank wall plate and a reinforcing rib plate. The inner tank bottom plate is connected to the inner tank wall plate, and the outer walls of the inner tank bottom plate and the inner tank wall plate are connected to the reinforcing rib plate. The inner tank bottom plate is arranged on the first cold insulation module, and a leveling layer is arranged between the inner tank bottom plate and the first cold insulation module; the inner tank wall plate is arranged on the second cold insulation module, and the intersection of the inner tank wall plate and the second cold insulation module is arranged to be an arc to reduce local stress concentration.

9. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 8, characterized in that: The reinforcing ribs include transverse ribs and longitudinal ribs, and the transverse ribs and longitudinal ribs are cross-connected to the outer wall of the inner tank wall.

10. The box-type full-capacity storage tank of the LNG gravity concrete receiving terminal according to claim 8, characterized in that: Multiple wave-breaking plates are connected to the inner tank bottom plate, and flow channels are provided at the connections between the wave-breaking plates and the inner tank bottom plate to keep the liquid level of the liquefied natural gas level; the side walls of the wave-breaking plates are connected to the inner tank wall plates, and rib plates are provided at the connections between the wave-breaking plates and the inner tank bottom plate and the inner tank wall plates to fix the wave-breaking plates.

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