COMPLEX STORAGE OF FLUID Russian patent published in 2014 - IPC F25J1/00 

FIELD: machine building.

SUBSTANCE: method of gas liquefaction includes the following stages. The supplied flow is supplied into liquefier, containing, at least, warm expander and cold expander. The supplied flow is compressed in the liquefier up to the pressure above critical one and the compressed supplied flow is cooled down to the temperature below the critical temperature for formation of dense phase high-pressure flow. Dense phase high-pressure flow is taken from liquefier and the pressure of dense phase high-pressure flow is decreased in the expansion device for formation of resulting two-phase flow. Then the resulting two-phase flow is immediately supplied to the storage tank. The selected part of the resulting two-phase flow is merged instantly with boiling out vapour of the liquid in the storage tank for formation of integrated steam flow. And the temperature of dense phase high-pressure flow is lower, than the temperature of output flow of the cold expander. The system of atmospheric gas liquefaction is also described.

EFFECT: development of simple and inexpensive liquefaction method with effective and beneficial extraction of vapours instantly escaped from tanks.

15 cl, 4 dwg, 2 tbl