Low-temperature storage tank

Abstract

The invention relates to a low-temperature storage tank. The low-temperature storage tank comprises an inner container, an outer container and a supporting assembly. The outer container surrounds the inner container, and an interlayer is formed between the outer container and the inner container; the supporting assembly is arranged in the interlayer; the supporting assembly comprises a movable supporting piece and a fixed supporting piece, and the movable supporting piece and the fixed supporting piece are arranged around the inner container so that stress of the inner container on the movable supporting piece and the fixed supporting piece can be dispersed, and the problem that local stress is too large cannot be caused. According to the low-temperature storage tank, the movable supporting piece and the fixed supporting piece obliquely extend to the outer peripheral wall of the inner container from the inner peripheral wall of the outer container, the movable supporting piece and the fixed supporting piece have certain lengths due to the extending arrangement, so that the movable supporting piece and the fixed supporting piece have certain elasticity, and the movable supporting piece or the fixed supporting piece can effectively relieve impact force due to the elastic acting force; the impact force between the inner container and the outer container is reduced, and the service life of the storage tank is prolonged.

Description

technical field [0001] The invention relates to the field of natural gas, in particular to a low-temperature storage tank. Background technique [0002] The International Maritime Organization (IMO) requires that the sulfur content of fuel oil be reduced from July 1, 2010. From 2010, the sulfur content of fuel oil must be below 3.5%, and from 2020 it will be reduced to 0.5%. In view of this, countries around the world have built dual-fuel powered ships, mainly fuel oil and natural gas, to meet IMO emission standards. [0003] In view of the unsound natural gas filling facilities in the current technology, the filling process is relatively cumbersome, and customers want fewer filling times to meet long-term operation needs. Therefore, liquefied natural gas (LNG) storage tanks continue to break through the capacity limit, from the original 200 From 390 to 500 square meters, up to the current largest 685 square meters, there are even double-layer liquefied natural gas (LNG) s...

AI Technical Summary

Problems solved by technology

Since the inner container is filled with liquefied natural gas, during the process of acceleration or turning of the ship, due to the effect of inertia, the support structure is likely to cause a large impact on the inner container, resulting in deformation of the inner container, which in turn affects the service life of the storage tank

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