LNG ship and thin film type enclosure system

Abstract

The invention discloses an LNG ship and a thin film type enclosure system. The thin film type enclosure system comprises a first sealing shielding layer, a second sealing shielding layer arranged on the outer side of the first sealing shielding layer and connected with the first sealing shielding layer through a first insulation structure, and a second insulation structure arranged on the outer side of the second sealing shielding layer and fixed to the second sealing shielding layer and the ship body structure. Pores in the first insulating structure and a gap between the first insulating structure and the first sealing shielding layer form a main shielding space, and pores in the second insulating structure and a gap between the second insulating structure and the second sealing shielding layer form a secondary shielding space; and the main shielding space and the secondary shielding space are filled with protective gas and are provided with sensors. According to the invention, a double-sealed ultralow-temperature LNG storage carrier is built, and the problems of LNG storage and leakage prevention are solved.

Description

technical field [0001] The invention relates to the technical field of ship building, in particular to an LNG ship and a membrane type containment system thereof. Background technique [0002] As a green, clean and high calorific value energy, the demand for liquefied natural gas in my country shows a rapid growth trend, and the gap between supply and demand is expanding rapidly. Therefore, by introducing natural gas resources from overseas, adjusting the energy structure, making up for energy shortages, and meeting the demand for emerging energy from the increasingly accelerated national economic development has become an important decision for my country to implement its energy strategy. However, liquefied natural gas is stored and transported at an ultra-low temperature of minus 163°C. Therefore, the type of cargo hold enclosure that is in direct contact with liquefied natural gas is very important. [0003] At present, the liquid cargo containment systems of large LNG c...

AI Technical Summary

Problems solved by technology

The film-type cargo tank is developed by the French GTT company, and there are NO.96, Mark III and CS1 types. These three types all use a 0.7mm thick metal film as the cargo tank lining, and are equipped with insulating materials and secondary isolation layers. After each layer is fixed to each other, it is closely connected with the hull, but the metal film has limited ability to withstand the sloshing load of liquid cargo, and the structure of the cargo tank is complicated, and the construction period is very long

The SPB cargo hold is a type of cargo hold developed by Japan's Ishikawajima Harima Heavy Industries (IHI). It is a ribbed structure made of 9 nickel steel. The structure of the cargo hold is complex and the cost is high.

In addition, South Korea has also developed the KC-1 membrane liquid cargo containment system. Both the main layer and the secondary layer are made of metal materials with a thickness of 1.5 mm.

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