Thermal insulation and cold insulation circulation system based on phase change thermal insulation material

Abstract

The invention relates to a thermal insulation and cold insulation circulation system based on a phase change thermal insulation material. The system comprises a phase change thermal insulation coating uniformly covering the outer side surface of an outer tank of an LNG storage tank, an outer side thermal insulation and cold insulation layer arranged on the inner side of the outer tank, an inner side thermal insulation and cold insulation layer arranged on the outer side of an inner tank wall plate of the LNG storage tank, and a middle phase change capsule filling layer, wherein a closed annular containing cavity is formed between the inner side thermal insulation and cold insulation layer and the outer side thermal insulation and cold insulation layer; and the middle phase change capsule filling layer is arranged in the annular containing cavity, and the middle phase change capsule filling layer is configured to absorb leaked heat of the LNG storage tank and release absorbed heat through phase change. The thermal insulation and cold insulation circulation system is suitable for thermal insulation of most LNG storage tanks, the interior of the inner tank wall plate can be maintained at the extremely low temperature through the characteristics of the phase change materials, cold loss of the LNG storage tank is reduced, the thermal insulation and cold insulation effect of the LNG storage tank is enhanced, the generation amount of BOG in the storage tank is further reduced, and even LNG in the tank can be stored in a supercooled state.

Description

technical field [0001] The invention relates to the technical field of LNG storage tanks, in particular to a heat preservation and cold preservation circulation system of a phase change heat preservation material. Background technique [0002] Phase change insulation materials refer to substances that change their physical form and provide latent heat with temperature changes, and are now widely used in civil buildings and other fields. Phase change material capsule is a tiny container containing phase change material. Its encapsulation technology has applications in aerospace, construction, automobile, environmental protection, textile and clothing, medical and health care, cooling of electronic devices, and military camouflage. [0003] LNG (liquefied natural gas) storage tank is a very important part of LNG receiving station and natural gas liquefaction plant. Its main function is to store ultra-low temperature LNG liquid at normal pressure -162°C. In order to ensure that...

AI Technical Summary

Problems solved by technology

[0004] At present, the widely used heat preservation and cold insulation system for LNG storage tanks is to use elastic felt inside and expanded perlite outside to reduce the cold loss of LNG storage tanks. The heat p

Images