Patent ID: 7309440

Claim:
A method for desalinating salt water ( 5 ), and for removing CO 2 from a CO 2 -rich exhaust ( 77 ) from a combustion engine or gas turbine ( 7 ), comprising the following steps: liquefied natural gas (LNG) ( 4 ) is fed into a heat exchanger ( 6 ) in which said LNG ( 4 ) receives heat from the following sources: said salt water ( 5 ) that becomes cooled salt water ( 30 ); and steam ( 27 ) generated from a steam turbine ( 31 ); and combustion air ( 3 ) from the atmosphere, which is provided via a line ( 28 ) to an air inlet ( 33 ) of said combustion engine or gas turbine ( 7 ); said heat exchanger ( 6 ) evaporating said LNG ( 4 ) to gaseous form ( 29 ), said gaseous form ( 29 ) being guided to a gas export module ( 10 ); and to a fuel gas skid ( 8 ) for supplying fuel to said combustion engine or gas turbine ( 7 ); in which said combustion air ( 28 ) which, at said air inlet ( 33 ) to said combustion engine or gas turbine, has a lowered temperature relative to said combustion air ( 3 ) and thus increases the efficiency of said combustion engine or gas turbine ( 7 ); in which CO 2 -rich exhaust ( 77 ) from said combustion engine or gas turbine ( 7 ) is guided into a process unit ( 17 ) having an inlet ( 35 a ) with a fan ( 35 b ) and an outlet ( 79 a ) for exhaust ( 13 ) of reduced CO 2 content; in which said cooled salt water ( 30 ) from said heat exchanger ( 6 ) is conveyed into said process unit ( 17 ) via an upper swivel ( 40 ) having vanes for rotating a coaxial feed pipe ( 67 ), said coaxial feed pipe ( 67 ) for distributing seawater and NH 4 OH feed, said coaxial feed pipe ( 67 ) being arranged in a center line of said process unit ( 17 ); in which NH 4 OH is fed via a lower swivel ( 46 ) on said coaxial feed pipe ( 67 ) and mixed with said cooled salt water ( 30 ) and released via a series of nozzles ( 42 ) from said coaxial feed pipe ( 67 ), said nozzles ( 42 ) arranged in several vertical levels, to upwardly flowing and rotating exhaust ( 77 ) of said process unit ( 17 ); thus achieving a mixture of NH 4 OH-containing salt water and CO 2 -rich exhaust ( 77 ) for formation of NaHCO 3 , NH 4 Cl and desalinated water.