NATURAL GAS ABSORPTION PREPARATION METHOD Russian patent published in 2018 - IPC F25J3/02 

FIELD: oil and gas industry.

SUBSTANCE: method for absorption preparation of natural gas, natural gas is subjected to primary separation, after which it is cooled and fed to secondary separation. The gas separated during the secondary separation is cooled and supplied to the absorber inlet, in which gas is subjected to absorption with liquid hydrocarbon absorbent. It is produced from liquid hydrocarbon flow separated from the primary separator by its sequential three-stage three-phase separation, and then separated from residual gases and cooled. After the second and third stages of three-phase separation, liquid hydrocarbon flow is heated. The gas withdrawn from the absorber is heated and supplied to the consumer. Gas withdrawn from the absorber is heated and supplied to the consumer. Liquid hydrocarbon flow after the secondary separation, a portion of liquid hydrocarbon phase flow after the first stage of three-phase separation, a flow of liquid hydrocarbons withdrawn from the absorber, and a gas flow consisting of mixed flows of gas phase after the second and third stages of three-phase separation and a flow of gases after separation from residual gases are mixed, methane-ethane fraction is separated from produced mixture and supplied in the form of liquid hydrocarbon product to the consumer.

EFFECT: improvement of natural gas preparation quality.

7 cl, 2 dwg