METHOD AND PLANT TO LIQUEFY FLOW OF NATURAL GAS Russian patent published in 2011 - IPC F25J3/02 F25J1/02 

FIELD: power engineering.

SUBSTANCE: invention relates to the method to liquefy a flow of hydrocarbons, for instance, a flow of natural gas, including at least stages of supplying the initial flow (10) of partially condensed hydrocarbons into the first device (2) for separation of gas and fluid; separation of raw materials flow (10) in the first device (2) to separate gas and fluid into a gaseous flow and a fluid flow; expansion of the gaseous flow (20), formed at the stage (b), to produce an expanded flow as a result (40), and its supply into the second device (3) to separate gas and fluid; supply of fluid flow (30) into the second device (3) to separate gas and fluid; removal of the fluid flow (60) from the second device bottom to separate gas and fluid and to supply it into a fractionating tower (5); removal of the gaseous flow (50) from the top of the second device (3) to separate gas and fluid and to supply it into a compressor (6) to produce a compressed flow (70) as a result; cooling of the compressed flow (70) to produce the cooled compressed flow (80); realisation of heat exchange between the cooled compressed flow (80) and the flow available downstream the first device (2) to separate gas and fluid and upstream the fractionating tower (5).

EFFECT: increased amount of produced liquefied natural gas.

13 cl, 2 dwg