A b-type lng cabin containment system

Abstract

The invention discloses a B-type LNG tank containment system, comprising a B-type cargo tank, a hull structure arranged outside the B-type cargo tank, and a collection device arranged in the void between the B-type cargo tank and the hull structure and pressure-bearing mechanism, the B-type cargo tank includes an insulating layer, a leakage channel and a cargo tank body arranged in sequence from the outside to the inside, the leakage channel is fixed with support blocks distributed at equal intervals, and the top of the leakage channel is provided with There is a vent pipe connected with the gas main pipe outside the hull structure, a socket is provided at the bottom, and the collecting device is communicated with the socket. The invention has simple structure, low cost, high safety and high reliability of the hull structure, effectively solves the problems of LNG storage and anti-leakage, and has high practical value.

Description

technical field [0001] The invention relates to the technical field of liquefied natural gas storage and transportation equipment, in particular to a B-type LNG tank containment system. Background technique [0002] As a kind of green, clean and high calorific value energy, the demand for liquefied natural gas in my country is growing rapidly, and the gap between supply and demand is expanding rapidly. Therefore, by importing natural gas resources from overseas, adjusting the energy structure, making up for energy shortages, and meeting the demand for emerging energy from the ever-accelerating national economic development have become an important decision for my country to implement its energy strategy. However, LNG is stored and charged at ultra-low temperature and minus 163°C. Therefore, the structure of the cargo tank is very important. [0003] At present, the liquid cargo containment systems of large LNG ships used in real ships include spherical tank type (MOSS), mem...

AI Technical Summary

Problems solved by technology

The spherical tank type cargo tank is developed by Rosenberg company in Norway. The shape of the storage tank in the cargo tank is spherical, and the cargo tank has no loading liquid level limit. The material of the storage tank is aluminum alloy A5083, and the periphery is covered with polyurethane insulating material. The cost is high and the safety is low.

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 aluminum alloy. The structure of the cargo hold is complex and the cost is high.

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