FIELD: gas industry.
SUBSTANCE: invention relates to equipment for production of low pressure gas and gas engine fuel and can be used in gas industry. High-pressure gas line of the plant is equipped with a fractionating column, the upper part of which is equipped with a heat-mass exchange section with a line for discharge of dry stripped gas, which is connected by a low-pressure gas line to a recuperative heat exchanger and an LNG separator. Lower part of column with discharge line of wide fraction of light hydrocarbons is equipped with heat-mass exchange section located on bypass of recuperative heat exchanger. Fractionation unit is equipped with inlet / outlet lines of a portion of low-pressure gas as a cooling agent. Dry stripped gas discharge line is divided into process gas line with expander and first cooler connected with separation gas line to form low pressure gas line, and production gas line, heat exchanger, compressor, second cooler, heat exchanger, first cooler, reducing device and LNG separator are arranged in series.
EFFECT: high output of LNG and elimination of use of external low-temperature cold sources.
1 cl, 1 dwg
