METHOD FOR MANAGING VALVES OF SIMULATED MOVING BED SEPARATION SYSTEM CAPABLE OF ALLOWING SIMULATED OPERATION OF SIMULATED MOVING BED SEPARATION LOOP

摘要

PURPOSE: To provide a method for managing valves of a simulated moving bed separation system, which is able to significantly increase purity of raffinate and or extract by allowing simulated operation of a simulated moving bed separation loop with a non-whole number of beds in each zone and/or finer monitoring of the concentration profile. CONSTITUTION: The method comprises, during each period, a first valve located at one end of a zone, which opens and closes in accordance with a law, while a second valve located downstream from the first valve in relation to a direction of flow of a recirculation flow opens and closes in accordance with the same law with an overlap time representing a lag in relation to the first valve, which is less than or equal to the period, the law imposing a constant total flow rate for the flow passing through the first and second valves throughout the overlap time.