50，do you know about several storage forms of lng cryogenic tank? -威尼斯2299

do you know about several storage forms of lng cryogenic tank?

at present, lng low-temperature storage tanks commonly used at home and abroad include atmospheric storage, sub parent tank under pressure storage and vacuum tank under pressure storage.

(1) vacuum tank: the vacuum tank is a double-layer metal tank, the inner tank is a low temperature resistant stainless steel pressure vessel, the outer tank is made of carbon steel, the interlayer is filled with insulation material, and the vacuum is pumped. the vacuum tank is manufactured in the factory and transported to the site as a whole after pressure test. the total lng storage capacity is 1000m ³ in the following, multiple vacuum tanks are generally used for centralized storage.

(2) secondary and primary tanks: the inner tank of the secondary and primary tanks is a number of low temperature resistant stainless steel pressure vessels, and the outer tank is a large carbon steel vessel, which is covered outside the multiple inner tanks. the inner and outer tanks are also filled with thermal insulation materials, and the interlayer is filled with dry nitrogen to prevent wet air from entering. the inner tank is manufactured in factory and transported to the site after pressure test, while the outer tank is installed on site.

(3) atmospheric tank: the structure of atmospheric tank includes bimetallic tank, and the outer tank adopts prestressed concrete structure; there are ground tanks and underground tanks, 20000m ³ the following are mostly bimetallic cans. the inner and outer tanks of atmospheric tank are installed and manufactured on site, and the production cycle is long

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