Patent ID: 9732673
Date: 2017-08-15
CPC Classifications: F02B,F02C,Y02E,Y02P

Claim:
1. An integrated system, comprising: a gas turbine system having a combustion chamber configured to substantially stoichiometrically combust a separately injected compressed oxidant and a fuel in the presence of a compressed recycle exhaust gas, wherein a ratio of oxygen supplied in the oxidant to oxygen required for stoichiometric combustion is maintained from 0.95:1 to 1.05:1, and wherein the compressed recycle exhaust gas serves to moderate a temperature of combustion in the combustion chamber, and the combustion chamber directs a discharge to an expander configured to generate a gaseous exhaust stream and at least partially drive a main compressor; an exhaust gas recirculation system configured to recirculate at least a portion of the gaseous exhaust stream to the gas turbine system and having at least one integrated cooling unit, wherein the at least one integrated cooling unit cools the recirculated gaseous exhaust stream before injection into the main compressor to generate the compressed recycle exhaust gas; and a CO wherein the at least one integrated cooling unit comprises a first column configured to receive the nitrogen exhaust gas and a cooling water supply and use the nitrogen exhaust gas to evaporate a portion of the cooling water supply to cool a remaining portion of the cooling water supply and generate a cooled water discharge; and wherein the at least one integrated cooling unit further comprises a second column configured to receive the cooled water discharge and the recirculated gaseous exhaust stream and use the cooled water discharge to cool the recirculated gaseous exhaust stream before injection into the main compressor.