FIELD: mechanical engineering.
SUBSTANCE: method of liquefying the natural gas comprises a natural gas purification from heavy hydrocarbons, sulfur compounds, and mercury vapour, mixing with the process gas and the compressor squeeze with the internal combustion engine as a drive. The obtained compressed material is divided into two parts. One portion is cooled by the sided coolant and coolant, which was obtained in the chiller by means of exhaust gases heat of the compressor drive, and mixed with another part, partially precooled by separation heated gas, and is cooled in the recuperative heat exchanger, and is separated into the process and product gases. Product gas is produced and separated along with obtaining a liquefied natural gas and separation gas. Separation gas is heated, mixed with the regeneration gas, and is used as a fuel gas to drive the compressor. Process gas is reduced, heated in the recuperative heat exchanger and mixed with the purified and drained natural gas. To reduce the content of light components in the reduced liquefied natural gas, the product gas is separated in a countercurrent heating at least a portion of the process gas.
EFFECT: increase in the yield and quality of the liquefied natural gas.
2 cl, 1 dwg
