Verfahren zur Trennung mindestens eines Gasgemisches in einer Druckwechseladsorptionseinheit

摘要

The separation of at least one feed gas (1) at a first pressure (P1) in a PSA unit (S) with the production of at least one first flow of a gas mixture (2) at a second pressure (P2), lower than (P1), and at least one second flow of a gas mixture (3) at a third pressure (P3) lower than (P2), includes a stage in which the second flow is compressed to a fourth pressure (P4), greater than (P3) in at least two parallel compressors (C1, C2). In the event of a temporary stoppage of one of the compressors the operating parameters of the PSA unit are modified to increase the pressure of the second gas mixture flow to a fifth pressure (P5) that is higher than P3. The modified operating mode of the PSA unit is pre-programmed into its control system.