| 摘要 |
The production phase, at maximum pressure PM, circulates the mixture in the adsorber to recover a fraction enriched in the less adsorbable components. A regeneration phase depressurizes the adsorber to a minimum pressure Pm, and a repressurization phase returns the adsorber to PM. If the flow rate drops, the pressure PM and the ratio PM/Pm are reduced and the durations of stages varied. When the flow rate drops, the final repressurization phase (a2) is shortened as PM is lower, and the depressurization phase is shortened as the PM/Pm ratio is reduced. The other stages are left unchanged. The initial repressurization phase (a1) and a first decompression stage (c1) before regeneration are extended. The mixture to be treated is air and the production gas is oxygen. Pressure PM is between 1.2 and 2 bars, preferably between 1.35 and 1.65 bars. Pressure Pm is between 0.20 and 0.65 bars, preferably between 0.3 and 0.45 bars. |
