PROCEDURE FOR LIQUEFACTION OF HYDROCARBON FLOW AND DEVICE FOR ITS REALISATION Russian patent published in 2011 - IPC F25J1/02 

FIELD: machine building.

SUBSTANCE: procedure for liquefaction of flow of natural gas in raw stock flow (10) consists in stages of circulation of flow (70) of first cooling agent in circuit (110) with first cooling agent, in cooling flow (70) of first cooling agent in circuit (110) with first cooling agent in one or more heat exchangers (14) of first stage (100) of cooling, in passing at least part of cooled flow (20) of first cooling agent through one or more expanders (12) for obtaining one or more expanded cooled flows (30) of first cooling agent, in passing one or at least one of expanded flows (30) of first cooling agent and raw stock flow (10) through first one or more heat exchangers (14) producing cooled flow (40) of hydrocarbons, in passing cooled flow (40) of hydrocarbons through second stage (200) of cooling in counter flow with flow (50) of second cooling agent and in production of liquefied flow (60) of hydrocarbons. According to the procedure generated useful power is used in circuit (110) of first cooling agent circulation for drive of one or more pumps (28a, 28b) facilitating circulation of flow of the first cooling agent to build up pressure of flow (70) of the first cooling agent. Temperature of said charged flow (70a) is reduced in one or more coolants (29) cooling it to temperature of environment before it flows through first heat exchanger (14).

EFFECT: raised efficiency.

20 cl, 1 dwg, 1 tbl