Abstract: A system and method for increasing the efficiency and/or power produced by an integrated gasification combined cycle system by increasing the integration between the air separation unit island of the integrated gasification combined cycle system and the remainder of the system. By integrating one or more of the nitrogen and oxygen gas product streams from the air separation unit in the remainder of the integrated gasification combined cycle system, heat may be utilized that helps to increase the efficiency of the combustion reaction and/or the gasification reaction used to produce the syngas utilized in the system.

Abstract: A system and method for increasing the efficiency and/or power produced by an integrated gasification combined cycle system by increasing the integration between the air separation unit island, the heat recovery steam generator and the remainder of the system. By integrating heat produced by the heat recovery steam generator in the remainder of the integrated gasification combined cycle system, heat may be utilized that may have otherwise been lost or used further downstream in the system. The integration helps to increase the efficiency of the combustion reaction and/or the gasification reaction used to produce the syngas utilized in the integrated gasification combined cycle system.

Abstract: A power plant may include a combustion apparatus (11) producing an exhaust gas (12), an absorber (20) receiving the exhaust gas (12), the absorber (20) including a desiccant and producing a first stream of desiccant solution containing water and a first concentration of desiccant, and an apparatus (29, 70, 94) for dehydrating the first stream of desiccant solution while maintaining the water in a liquid phase. The apparatus (29, 70, 94) may include one or more reverse osmosis apparatus (30, 40) that receive the first stream of desiccant solution and produce a second stream of desiccant solution containing a second concentration of desiccant greater than the first concentration of desiccant. The apparatus (29, 70, 94) may include a heat exchanger (71, 110), a crystallizing heat exchanger (74, 96), a separator (78, 98) and a flash tank (112) for dehydrating the desiccant solution while maintaining water in a liquid phase and subsequently recovering water from the solution.

Abstract: A system (10) for removing water from a flue gas (12) produced using a fossil fuel that may include a heat exchanger (16) having a first side (19) for receiving a flow of heat exchanging fluid and a second side (21) for receiving the flue gas (12). Heat exchanger (16) may cool the flue gas (12) sufficiently to cause a condensation of water vapor contained in the flue gas (12). An absorber (40) may be provided having a gas inlet (41) for receiving the flue gas (12) from the heat exchanger (16), an inlet (45) for receiving a desiccant solution and a media (42) receiving the desiccant solution for providing surface area contact between the flue gas (12) and the desiccant solution for chemically absorbing water from the flue gas (12). A dual cooler (26) may include a first side (27) through which a heat exchanging fluid and the desiccant solution may be directed for cooling.