Method for processing a natural load gas for obtaining a natural processed gas and a reduction in C5+ hydrocarbons, and associated installation

摘要

This method consists of the introduction of a load current (54) in a first tank (22), the dynamic expansion of the gas current (56) emanating from the tank (22) in a turbine (24), then its introduction into a first purification column (26). It comprises the production at the top of the first column (26) of purified gas (70) and the recovery at the bottom of the first column (26) of a liquefied bottom gas (74), which is introduced after expansion into a second column (30) for elimination of C+ hydrocarbons. The purified top natural gas (70) from the first column (26) is reheated in a first heat exchanger (20) by heat exchange with a load gas (12). The method comprises the compression of top gas current (86) in second column (30) in a compressor (38) before it is introduced into a second separator tank (40).