Method and apparatus for co-generating electricity in a process plant integrated with a thermal power generator using feedwater

A method for co-generating electricity in a process plant using feedwater, wherein the process plant is integrated with a thermal power generator, the method comprising:

• obtaining a pressurized stream of hot feedwater from a feedwater generation unit of the process plant;
• compressing the pressurized stream of hot feedwater by pumping and splitting the pressurized stream of hot feedwater to obtain a first stream of feedwater and a second stream of feedwater, wherein the first stream of feedwater is routed to a preheater;
• routing the second stream of feedwater to the thermal power generator;
• cooling the second stream of feedwater against a process fluid that is used in the thermal power generator to generate a heat in the thermal power generator and to obtain a cooled second stream of feedwater;
• co-generating the electricity, using the thermal power generator integrated with the process plant, using the heat;
• mixing at least a portion of the cooled second stream of feedwater with the first stream of feedwater to obtain a mixed stream of feedwater;
• preheating the mixed stream of feedwater using a hot synthesis gas stream to obtain a preheated mixed stream of feedwater;
• and
• routing the preheated mixed stream of feedwater to the thermal power generator for heat transfer and for electricity generation.