Cryogenic liquid storage tank

Abstract

A cryogenic liquid storage tank comprising - a base plate (2,5) and side wall (3) extending upwardly, - the base plate (2) and side wall (3) comprising an outer leaf (3b) enveloping an inner leaf (3a), both forming structurally continuous transitions from the base plate (2) to the side wall (3), - the outer leaf (3b) part of the base plate (2) comprising a lower, outer leaf concrete bottom plate (5) on a substrate, - the bottom plate (5) continuous with an outer leaf reinforced concrete layer (50) of the outer side wall (3b), the outer leaf concrete layer (50) hoop stress reinforced, - an inward surface of the bottom plate (5) and concrete layer (50) of the outer leaf (3b) lined with a continuous outer leaf metallic membrane (6, 51), - a bottom insulation layer (7) arranged above the outer leaf metallic membrane (6) on the bottom plate (5), the bottom insulation layer (7); formed continuous with a wall insulation (14i) filled in an annular cavity (14) between the inner face of the outer leaf (3b) and an outer face of the inner leaf (3a), - the inner leaf (3a) comprising an inner leaf concrete bottom layer (8) on the bottom insulation portion (7), the bottom layer (8) formed structurally continuous with a hoop stress reinforced inner leaf wall outer concrete layer (11), both lined with a continuous inner leaf metal membrane (9, 12), - the inner leaf metal membrane (9, 12) lined with an inner leaf inner concrete layer (10, 13), - the outer outer concrete wall (50) supporting an insulated dome structure (4).

Description

technical field [0001] The present invention relates to large liquid storage tanks, and more particularly to tanks for storing cryogenic liquids such as liquid oxygen and nitrogen, and liquid natural gas (LNG), consisting primarily of methane, ethane and propane. Background technique [0002] Liquid natural gas is stored at or near ambient pressure and at cryogenic temperatures in large tanks where the liquid is cooled as the energy in the liquid is lost by evaporating some of the liquid into gas. Published PCT application WO 2004 / 001280 describes such a tank. To minimize gas loss, the walls, base and roof of the storage tank are thermally insulated. [0003] The base of the tank developed from the tank described above consists of a concrete footing, on which the outer metal sheet is laid. The thermal insulation of foam glass bricks is laid on the outer metal panels. Next, a concrete base is laid over the insulation to form the bottom of the inner tank. The metal base is...

AI Technical Summary

Problems solved by technology

the steel sections of the dome could only be lifted into place during calm weather conditions, so construction plans were easily disrupted

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