METHOD OF PARTIAL LIQUEFACTION OF NATURAL GAS (VERSIONS) Russian patent published in 2015 - IPC F25J1/00 

FIELD: machine building.

SUBSTANCE: method of partial natural gas liquefaction under option 1 switches on the pre-cooling of direct HP gas flow. After cooling the direct flow is throttled and separated in the rectifier to liquid phase and steam phase. The steam phase is supplied for re-condensation with further supply of part of re-condensed product flow to the rectifier as reflux, and throttling of the other part of the re-condensed product and separation to the liquid phase being finished product, and steam phase sent as back flow for the direct flow cooling. The liquid phase from the rectifier is expanded and due to re-condensation of the steam phase from the rectifier it is evaporated, then it is heated by the direct flow, and after re-throttling is sent to the back flow. In contrast to the option 1 during the partial natural gas liquefaction method under option 2 part of the direct flow after cooling is expanded and mixed with back flow.

EFFECT: suggested group of inventions ensures production of the liquefied natural gas with low content of high boiling components, including carbon dioxide having increased operation characteristics, upon power consumption decreasing for its production.

2 cl, 2 dwg