| 摘要 |
The present invention relates to an energy efficient process for generation of heat and power, where a carbon containing fuel is combusted with an oxidant in a MCM-burner for generation of heat, an oxygen depleted air stream and an exhaust gas with a high concentration of CO2 and a low concentration of NOx, where the oxidant is obtained by the following steps: a) a compressed air stream is preheated in a first stage (A) to a temperature level above 600 DEG C, b) the compressed and preheated air stream from stage (A) is fed to a second stage (B), including a mixed conducting membrane which is able to separate oxygen from the hot air stream fed to the retentate side of said membrane, where a hot sweep gas picks up the oxygen from the permeate side of said membrane and transports the oxygen to the first stage (A), where a carbon containing fuel is combusted with the oxygen enriched sweep gas for generation of heat utilised for indirectly preheating the air stream in stage (A) by means of a heat exchanger, c) passing the oxygen depleted air stream from said second stage (B) into a third stage (C) including the MCM-burner, where the depleted air stream flows on the retentate side of the MCM-burner membrane giving off oxygen to the combustion zone on the permeate side of the membrane , where oxygen (i.e. the oxidant) reacts directly with added fuel on the membrane or close to the membrane surface for generation of heat and a hot exhaust gas stream with a high concentration of CO2 and low concentration of NOx. The invention further relates to use of the generated heat, the generated hot depleted air stream and the generated hot exhaust gas stream from said process. |
