| 摘要 |
PURPOSE: A high-efficiency simulated moving bed separation system is provided which is capable of separating a desired component from a feedstock mixture at high speed and high efficiency even when a feedstock fluid and a desorbing liquid are introduced at a high rate into an inlet port provided between a unit packed bed and the succeeding unit packed bed, each bed filed with a packing having a very small particle size. CONSTITUTION: The simulated moving bed separation system comprises a packed bed assembly, a first rotary valve, a second rotary valve, a third rotary valve, a fourth rotary valve, a circulation pump, and a fifth rotary valve, the packed bed assembly comprising a plurality of unit packed beds each containing a packing therein, the unit packed beds being connected in series to each other via a fluid passage and arranged to form a circulation passage for allowing unidirectional circulation of a fluid through the connected unit packed beds; the first rotary valve being designed to supply a feedstock fluid containing a weakly adsorbable substance and a strongly adsorbable substance to any selected one of the unit packed beds in the packed bed assembly; the second rotary valve being designed to draw out a solution containing a weakly adsorbable substance, i.e. a raffinate, from the unit packed bed positioned downstream of the unit packed bed to which the feedstock fluid has been supplied; the third rotary valve being designed to draw out a fluid from the unit packed bed positioned downstream of the unit packed bed from which a raffinate has been drawn out; the fourth rotary valve being designed to supply the fluid discharged out from the third rotary valve and a desorbing liquids to the unit packed bed positioned downstream of the unit packed bed from which a fluid has been drawn out; the circulation pump being designed to transfer the fluid discharged out from the third rotary valve and a desorbing liquids to the fourth rotary valve; the fifth rotary valve being designed to select a unit packed bed downstream of the unit packed bed to which a desorbing liquid has been supplied and draw out a solution containing a strongly adsorbable substance, i.e. extract, from the selected unit packed bed; wherein the desorbing liquids supplying position, the extract draw-out position, the feedstock fluid supplying position and the raffinate draw-out position are shifted in succession intermittently without changing this order by the change-over operations of the first to fifth rotary valves.
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