Apparatus and process for removal of carbon dioxide from a gas flow and treatment of brine/waste water from oil fields

An apparatus for separating useful material from an oil field fluid waste mixture comprising:

• a phase separator;
• an electrochemical membrane separation cell;
• a compressor;
• a spray dryer;
• and
• a cyclone separator;
• wherein a stream comprising an oil field fluid waste mixture is fluidly connected with the phase separator, which separates the fluid waste mixture into a water stream comprising a first NaCl solution and at least one stream selected from the group consisting of an oil stream and a gas stream, and mixtures thereof;
• wherein the water stream comprising the first NaCl solution is fluidly connected to the electrochemical membrane separation cell, which separates the water stream containing the first NaCl solution into a stream comprising a first aqueous sodium hydroxide solution and a stream including one or more materials selected from the group consisting of hydrochloric acid, chlorine gas, and mixtures thereof
• wherein a gas comprising carbon dioxide is in operative communication with the compressor, which compresses the gas comprising carbon dioxide;
• wherein a stream comprising a second aqueous sodium hydroxide solution, which includes a first portion of the sodium hydroxide from the first sodium hydroxide solution, is fluidly connected to the spray dryer;
• wherein the compressed gas is fluidly connected to the spray dryer;
• wherein the spray dryer mixes the second aqueous sodium hydroxide solution and the compressed gas to form a stream comprising sodium carbonate;
• and
• wherein the stream comprising sodium carbonate is fluidly connected to the cyclone separator, which separates the sodium carbonate from the stream comprising sodium carbonate into solid sodium carbonate and a reclaimed water stream.