| 摘要 |
The present disclosure relates to a method of operating a boiler system (27) comprising an oxy-fuel boiler (7) in which an oxygen stream (6) and a fuel stream (2) are combusted to generate a flue gas stream (8), an air separation unit (4) producing the oxygen stream (6) for the oxy-fuel boiler (7), and a gas processing unit (25) for cleaning and compressing at least a portion of the flue gas stream (6) generated in the oxy-fuel boiler (7) producing a pressurized carbon dioxide stream (18), the method comprising:
operating the boiler system (27), at least for a period of time, in a recirculation mode, during which a carbon dioxide stream (20) from a CO 2 compression unit (17) within the gas processing unit (25) is evaporated in the air separation unit (4) and forwarded as a stream (24) to the gas processing unit (25). The present disclosure further relates to a boiler system for an oxy-fuel process as well as to a power plant comprising such a system. The present disclosure also relates to the use of a carbon dioxide containing stream as a refrigerant. |
