LOW-TEMPERATURE GAS PROCESSING AND INSTALLATION FOR ITS IMPLEMENTATION (VERSIONS) Russian patent published in 2015 - IPC F25J3/02 

FIELD: oil and gas industry.

SUBSTANCE: method and installation includes cooling of gas, division of cooled and condensed gas flow in the same divider with produced gas and liquid phases. Gas phase is expanded and delivered to rectification tower. Stripped gas is received in the upper part of the rectification tower, flow of still steam - in the medium part and liquid product in the lower part. Stripped gas is heated; still steam flow is cooled and separated with receipt of gas phase directed to heat exchange with gas flow and liquid phase directed to irrigation of the rectification tower. Liquid phase received in the divider is cooled by heat exchange with flow of stripped gas, restricted and directed to heat exchange with flow of still steam flow, thereupon flow of liquid phase is directed to heat exchange with flow of gas and then supplied to the lower part of the rectification tower.

EFFECT: increased output of target hydrocarbons and yield of broad fraction of light hydrocarbons, reduced capital costs.

10 cl, 4 dwg, 1 tbl