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162,What are the storage methods of LNG cryogenic storage tanks( 1) -Doer equipment

Classification:Forum PublishTime:2020-05-07 15:11:43

What are the storage methods of LNG cryogenic storage tanks( 1)


At present, there are three common LNG low-temperature storage tanks at home and abroad: normal pressure storage, pressure storage in parent tank and pressure storage in vacuum tank. The storage method mainly depends on the storage capacity.


The first one is: child and mother tank


The inner tank of the sub master tank is a plurality of low temperature resistant stainless steel pressure vessels, the outer tank is a large carbon steel vessel covered outside a plurality of inner tanks, the inner and outer tanks are also filled with thermal insulation materials, and the interlayer is filled with dry nitrogen to prevent the entry of wet air. The inner tank of the parent tank shall be manufactured in the factory and transported to the site after pressure test, and the outer tank shall be installed on the site.


The storage capacity is 1000m ³ To 5000m ³ For the storage and distribution station, the sub parent tank or atmospheric tank can be selected according to the situation. Doer to the requirements of inner tank transportation, the largest single vacuum tank for land transportation in China is 250m ³, The gasification process flow of the sub master tank is roughly the same as that of the vacuum tank. Because the interlayer needs to be filled with nitrogen, a set of liquid nitrogen device is added to the device.



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