Airtight full concrete LNG (liquefied natural gas) full-volume storage tank

Abstract

The invention relates to an airtight full concrete LNG (liquefied natural gas) full-volume storage tank, which comprises an outer tank, a bearing table, a dome, an inner tank and an airtight sealing system, wherein the outer tank and the inner tank are of a cylinder-shaped prestressed reinforced concrete structure; the bottom end of the outer tank is fixed on the bearing table; a tank bottom coldinsulation structure is laid on the bearing table positioned inside the outer tank; the dome is of a spherical circular arc shape reinforced concrete structure and covers the top of the outer tank; the bottom end of the inner tank is fixed on the tank bottom cold insulation structure; a tank top cold insulation structure is laid at the top part of the inner tank; a tank wall cold insulation structure is arranged in an annular space between the inner tank and the outer tank; the airtight sealing system is arranged in the tank wall cold insulation structure near one side of the inner tank. The reinforced concrete structure with stable structure mechanical property, low cost and effect of easily obtaining materials from local sources is used for replacing X7Ni9 steel; the bearing capability of the inner tank structure is greatly improved; a large amount of building costs is also reduced; the tank volume limitation of a conventional LNG full-volume storage tank is greatly broken through onthe basis; the unit volume operation efficiency is obviously improved.

Description

technical field [0001] The invention relates to a liquefied natural gas (LNG) storage container device, in particular to an airtight full-concrete LNG full-capacity storage tank, which belongs to the technical field of LNG transmission and distribution Background technique [0002] LNG is a clean energy with methane as the main component, which is obtained by cooling conventional natural gas to below -160°C under normal pressure and separating polluting elements such as sulfur and phosphorus through a low-temperature liquefaction process. The effect of low temperature causes a huge change in the storage state of LNG, the volume is compressed to about 1 / 600, and the density is about 480kg / m 3 Colorless, odorless and non-corrosive liquid. In the LNG industry chain, safe storage is a key link. LNG full-capacity storage tank is the core storage facility in the LNG industry chain, which requires large investment, intensive technology and high safety requirements. At present, t...

AI Technical Summary

Problems solved by technology

[0003] Controlled by the thickness requirements of the inner tank wall plate in the manufacturing process of conventional LNG full-containment storage tanks, the design of the tank capacity is greatly restricted, and the operating efficiency per unit volume of the storage tank cannot be greatly improved

In addition, the high price and large amount of X7Ni9 steel make the construction cost of storage tanks remain high, which restricts the development of the LNG industry to a certain extent

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