Method of feeding, with impure nitrogen, the combustion chamber of a gas turbine combined with an air distillation unit, and corresponding electricity generation plant

摘要

The air distillation unit (2) has a low-pressure column (11C) which operates clearly above atmospheric pressure. The waste nitrogen coming from this column serves to purge, under low pressure, the air purification adsorbers 10A, 10B) in order to desorb at them of the contaminants (water and CO₂), then is mixed with the impure nitrogen stream sent directly to the nitrogen compressor (14) which feeds the combustion chamber (8) of the gas turbine (1). At the start of regeneration, each adsorber is decompressed down to atmospheric pressure, then brought back up to the low pressure by means of impure nitrogen.