HIGH EFFICIENCY INTEGRATED GASIFICATION COMBINED CYCLE POWER PLANT

摘要

A system and method for integrating gasification processes with membrane oxygen separation, advanced steam conditions, and effective heat recovery. Through the integration of synergistic technologies, a highly efficient Integrated Gasification Combined Cycle (IGCC) power plant can be constructed. A combined cycle power plant that includes substantial amounts of duct firing in its Heat Recovery Steam Generator (HRSG) can be used in conjunction with membrane oxygen separation to provide the necessary air heating to the range of 1470 to 1650° F. This high-end energy in the HRSG can also be utilized to create more steam at elevated conditions in the HRSG, and thus provide additional cold feedwater for cooling in the HRSG and for cooling in both the gasification and oxygen membrane separation processes. When CO₂ release to atmosphere is to be minimized, the invention may utilize a synergistic hydrogen membrane separation technology.