ADSORPTION CONTROL METHOD AND CONTROLLER

摘要

The present invention provides a method and a control system for controlling an adsorbent bed unit in which an adsorbent bed concentration of an impurity within an adsorbent bed of the adsor-bent bed unit is measured. The adsorbent bed concentration is controlled by manipulating the feed cycle time during which an adsorbent bed is adsorbing the impurities to maintain the adsorbent bed concen-tration at a targeted adsorption bed concentration. The targeted ad-sorption bed concentration is determined such that the product impuri-ty concentration is maintained at product impurity concentration tar-gets. The method and control system can incorporate a supervisory level of control reactive to product impurity concentration levels and related targets to determine the targeted adsorption bed concentration and a primary level of control that calculates the feed cycle time based upon an error between the measured and targeted adsorption bed con-centrations. Proportional integral control can be used for such purpos-es.