Treating natural gas, by adsorbing water and reduced sulfur by contacting natural gas with drying solvent and producing dry gas stream and stream of drying water solvent, and regenerating drying solvent by distillation and reboiling

摘要

The method comprises: adsorbing water and reduced sulfur by contacting a natural gas with a drying solvent and producing a dry gas stream and a stream of drying water solvent charged with water and organic sulfur compounds; regenerating the drying solvent by distillation and reboiling to produce a regeneration effluent; and separating the regeneration effluent in a three-phase separator, where an aqueous phase and a gas phase produced during the separation are sent and burned in an economizer (60) to provide heat necessary for the reboiling. The method comprises: adsorbing water and reduced sulfur by contacting a natural gas with a drying solvent and producing a dry gas stream and a stream of drying water solvent charged with water and organic sulfur compounds; regenerating the drying solvent by distillation and reboiling to produce a regeneration effluent; and separating the regeneration effluent in a three-phase separator, where an aqueous phase and a gas phase produced during the separation are sent and burned in an economizer (60) to provide heat necessary for the reboiling, and the organic phase produced during the separation is contacted with regenerated solvent output from the step of reboiling. The organic phase from the step of separation is dried in a unit for reducing a water content before contacting the regenerated solvent. The contacting of the organic phase with the regenerated solvent is carried out in a contactor (401). The organic phase is first heated and vaporized to bring into contact with the regenerated solvent as a stripping gas downstream from a reboiler to improve the regeneration of solvent. The gas phase output from the step of separation is preheated before being sent into a combustion chamber of the economizer and washed with a fraction of solvent before being sent into the economizer. The aqueous phase output from the step of separation is injected into the combustion chamber in liquid or vapor form. The various phases of effluents output from the three-phase separation are partially or completely heated by heat transfer with a fluid or an external coolant. An independent claim is included for a device for treating natural gas.