Underground liquefied natural gas storage

FIELD: transport.

SUBSTANCE: proposed storage comprises reinforced concrete tank mounted on the bed of compacted soil and heat-isolation layer and having vertical sidewalls, said being surrounded by pliable layer at outer side surface and heat- and water-insulated from liquefied natural gas. Storage shaft is equipped with pipelines to fill said storage with said gas and its vapors and to discharge the latter therefrom. Said shaft extending from reinforced concrete tank to surface is equipped with tight hatches and staircase. Tank top is buried in the heat-insulation material layer. Note here that tank top features cross-section decreasing towards earth surface and is shaped to truncated cone and connected with said shaft by sealed flange joint. Aid tank top with flange joint are arranged at decreased spacing from frozen soil bottom surface.

EFFECT: simplified design.

3 dwg

 

The invention relates to underground storage system and backup LNG, namely economical, fire - proof vaults located below ground level, and can be used for accumulation and delivery of LNG to consumers in areas where there is no pipeline natural gas.

Known adopted as a prototype underground storage of liquefied natural gas containing located at the base of compacted soil and the insulating layer reinforced concrete tank with overlaying it on top of a flat roof, on the outer side surface of vertical walls surrounded by a pliable layer, insulated from the inside and gidroizolirovat from liquefied natural gas, is supplied located in the technological mine pipelines for filling the issuance of liquefied natural gas and its vapors coming out of reinforced concrete reservoir on the surface of the earth technological mine fitted with airtight doors and stairs, and the top concrete tank covered with a layer of lightweight insulation material, roof concrete tank made with guys, strained from the roof the supporting reinforced concrete ring located in a concrete wall above the roof and below the earth's surface, the shrouds covered with corrosion-resistant coating and backfilled to surface the earth with a layer of lightweight insulating material (RF patent No. 2431770, IPC F17C 1/00, B65G 5/00, E04B 7/14, publ. 20.10. 2011, bull. No. 29).

The disadvantages of the known underground storage are the following:

1) the complexity of the structure overlying the reservoir on top of a flat roof, exposed to significant vertical loads due to the size of the roof corresponding to the cross-sectional area of concrete tank.

2). The complexity of the sealing of the tank due to the considerable length of the contact contour of the roof with the top edge of the tank.

3) a lot of pressure on guys to maintain the roof in a given state, which may be susceptible to the damaging effects due to oxidative processes and seasonal temperatures, which can lead to increased loads on the roof and its destruction.

4) the Limited capacity of the tank due to the necessity of placing the top slab at a considerable depth from the earth's surface.

These drawbacks reduce the reliability of the store, causing a significant increase in capital costs and operating costs in the construction and maintenance of underground storage of liquefied natural gas.

The technical result of the invention is to simplify the construction of the underground gas storage facilities to reduce capital costs and operating costs with increased reliable the STI system sealing concrete tank and increase its capacity.

The technical result is achieved by the fact that underground storage of liquefied natural gas containing located at the base of compacted soil and the insulating layer reinforced concrete tank with vertically oriented side walls, surrounded by the outer side surface of the pliable layer, insulated from the inside and gidroizolirovat from liquefied natural gas, is supplied located in the technological mine pipelines for filling the issuance of liquefied natural gas and its vapors coming out of reinforced concrete reservoir on the surface of the earth technological mine fitted with airtight doors and stairs, and the top concrete tank covered with a layer of insulating material, while the upper part of the tank is made with decreasing cross-sectional area in the direction of the earth's surface by performing it in the form of a truncated cone and is connected with the mine sealed flange joint, while the upper part of the tank with flange connection with a mine placed with a reduced distance from the bottom surface promiseme soil.

Underground storage is presented in figure 1 is a vertical section along its Central axis, figure 2 - section a-a of figure 1 with a rectangular cross-section of the lower and upper parts of the re is ervoir, figure 3 - the same, with a circular cross-section of the lower and upper parts of the tank.

Underground storage of liquefied natural gas is located below ground level 1 at the level of preventing the freezing of the earth, and is fenced around the perimeter concrete wall 2 contains located at the base of compacted soil 3 and insulating layer 4 concrete tank 5, which is surrounded by the outer side surface of the pliable layer 6. Inside the tank 5 is covered with the insulation layers 7 and collar 8. Thus the lateral surface of the tank 5 is made with vertically oriented walls 9, placed at the base, and the upper part 10 is made with a reduced cross-sectional area in the direction of the earth's surface 1 due to the performance profile of the upper part 10 of the tank by means of inclined forming surface. Coming out of the concrete tank 5 to the surface of the earth 1 technological shaft 11 with 12 pipelines for filling the issuance of LNG and its vapors are equipped with hermetic doors 13 and ladder 14. Top 10 concrete tank 5 is made with a reduced cross-sectional area in the direction of the earth's surface 1 by executing it in the form of a truncated cone and is connected with the technological shaft 11 is sealed flange connection 15 and covered up SL is eating insulating material 16. The upper part 10 of the tank 5 with flange connection 15 with the shaft 11 is placed with a reduced distance from the bottom surface 17 promiseme soil. Is it possible due to the fact that the upper part 10 of the tank 5 adjacent to the shaft 11. The cross-section of the bottom 9 and the top 10 pieces of concrete tank 5 may be made of a rectangular (figure 2) or round (figure 3) forms.

Features of the invention provide, in comparison with the prototype, increasing the capacity of the tank at the same depth, a considerable simplification of the construction of the underground gas storage facilities to reduce capital costs and operating costs with increased system reliability sealing concrete tank by eliminating flat roof with a significant load on her and supporting her guy a few times, reducing the length of and substantially simplify the design of a sealed loop of the upper part of the tank, insulation material with any bulk mass, as the upper part of the tank with inclined forming can withstand much greater loads than flat roof of the known underground storage, which extends the underground storage in different areas and with different the insulating materials.

Underground storage of liquefied natural gas containing located at the base of compacted soil and the insulating layer reinforced concrete tank with vertically oriented side walls, surrounded by the outer side surface of the pliable layer, insulated from the inside and gidroizolirovat from liquefied natural gas, is supplied located in the technological mine pipelines for filling the issuance of liquefied natural gas and its vapors coming out of reinforced concrete reservoir on the surface of the earth technological mine fitted with airtight doors and stairs, and the top concrete tank covered with a layer of insulating material, characterized in that the upper part of the tank is made with decreasing cross-sectional area in the direction of the earth's surface for by running it in the form of a truncated cone and is connected with the mine sealed flange joint, while the upper part of the tank with flange connection with a mine placed with a reduced distance from the bottom surface promiseme soil.



 

Same patents:

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FIELD: machine building.

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FIELD: machine building.

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17 cl, 4 dwg

FIELD: oil and gas industry.

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5 dwg

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FIELD: machine building.

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4 dwg, 1 tbl

FIELD: machine building.

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7 dwg

FIELD: machine building.

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3 cl, 2 dwg

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Hung ceiling // 2400606

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Wide-span building // 2334852

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2 cl, 3 dwg, 1 ex, 1 tbl

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2 cl, 2 dwg, 2 tbl

Suspended covering // 2283402

FIELD: building, particularly coverings for civil buildings, namely sports or similar structures.

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3 dwg

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6 dwg

FIELD: building, particularly roof structures.

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5 cl, 4 dwg

The invention relates to building structures and can be used in detached structures (for example, hard cross contact network of electrified Railways for the suspension of lighting fixtures, etc), etc

FIELD: oil and gas industry.

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EFFECT: improving operating efficiency of an underground gas storage.

1 dwg

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