Double hot corner protection structure and low-temperature storage tank

Abstract

The invention discloses a double hot corner protection structure. The protection structure is arranged between an inner tank and an outer tank of a low-temperature storage tank and comprises an upperhot corner structure and a lower hot corner structure, wherein the upper hot corner structure has excellent elastic shrinkage performance, can guarantee good sealing performance and is not easily damaged, and when a medium in the inner tank leaks and the upper hot corner structure is damaged, the lower hot corner structure is used for bearing low-temperature impact of the leaked medium and is notdamaged, so that double protection at the joint of the tank wall and the tank bottom of the outer tank is realized. The invention further discloses the low-temperature storage tank. A bottom plate ofthe hot corner protection structure is arranged at the lower part of a concrete ring wall, the temperature borne by the bottom plate of the hot corner protection structure under the normal operating condition is increased to some extent, the low-temperature shrinkage amount of the bottom plate under the normal operating condition is reduced, meanwhile, the consumption of the lower hot corner structure is reduced, and the cost is saved; and the low-temperature storage tank solves the problem of low-temperature shrinkage of the hot corner protection structure and has excellent safety and stability.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and specifically relates to a double thermal angle protection structure and a low-temperature storage tank. Background technique [0002] With the increasing awareness of environmental protection and the national development strategy of coal-to-natural gas, the demand for clean energy represented by liquefied natural gas has grown rapidly, and the demand for cryogenic storage tanks has also increased significantly. In order to ensure the safety of cryogenic storage tanks, a full-capacity tank structure is usually adopted. Among them, in order to avoid low-temperature damage at the junction of the outer tank wall and the outer tank bottom in the case of inner tank leakage, a thermal corner protection structure is set between the inner and outer tanks. When the low-temperature medium in the inner tank leaks, the hot corner protection structure will shrink greatly under the influence of t...

AI Technical Summary

Problems solved by technology

When the low-temperature medium in the inner tank leaks, the hot corner protection structure will shrink greatly under the influence of the low-temperature medium, which will cause very large temperature difference stress at the connection parts of the hot corner protection, which will easily lead to the destruction of the hot corner protection structure. As a result, low-temperature damage to the outer tank and the foundation cap is caused

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