| 摘要 |
Embodiments of a liquid-solid countercurrent extraction system are provided, as are embodiments of a method for reducing the likelihood of rotary valve cavitation during liquid-solid countercurrent extraction. In one embodiment, the extraction system includes an adsorbent chamber and a rotary valve fluidly coupled to the adsorbent chamber. The rotary valve directs a first net stream into a different section the adsorbent chamber in each of a plurality of indexed positions. A first flow control element is fluidly coupled between the rotary valve and the source of the first net stream, and a controller is operably coupled to the first flow control element. The controller is configured to modulate the first flow control element during indexing of the rotary valve to reduce the flow rate of the first net stream and thereby maintain sufficient pressure of the first net stream to prevent cavitation within the rotary valve. |
