METHOD FOR REMOVING DISSOLVED GAS FROM FEED STREAM OF EVAPORATOR Russian patent published in 2018 - IPC B01D1/14 B01D3/34 B01D19/00 C02F1/40 E21B43/40 

FIELD: technological processes.

SUBSTANCE: invention relates to methods for removing dissolved gases from a feed stream of an evaporator. Method of extracting oil from an oil well, in which: the water-oil mixture is extracted from a well; separation of water-oil mixture with the formation of oil products and extracted water; direction of the produced water through the deaerator; after the direction of the produced water through the deaerator, the direction of the extracted water into the evaporator and the formation of concentrated brine and steam; condensation of steam to form a distillate; direction of the distillate into the steam generator and the production of steam; introducing at least a portion of the steam into the injection well; desorption of dissolved gas from the produced water upstream of the evaporator by steam from the evaporator through the deaerator; maintaining the vapor pressure in the deaerator below atmospheric pressure and before the produced water is supplied to the deaerator, heating the extracted water to a temperature above the saturated steam temperature in the deaerator, and setting the vapor pressure and temperature in the deaerator by exposing the vapor sent from the evaporator to the deaerator, dropping the pressure in place between the evaporator and the deaerator.

EFFECT: increased desorption.

19 cl, 2 dwg