The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2011
Filed:
Mar. 25, 2009
Paul W. Belanger, Clarence Center, NY (US);
Mohamed Safdar Allie Baksh, Wheatfield, NY (US);
Preeti Chandra, Buffalo, NY (US);
Andrew C. Rosinski, Orchard Park, NY (US);
Paul W. Belanger, Clarence Center, NY (US);
Mohamed Safdar Allie Baksh, Wheatfield, NY (US);
Preeti Chandra, Buffalo, NY (US);
Andrew C. Rosinski, Orchard Park, NY (US);
Praxair Technology, Inc., Danbury, CT (US);
Abstract
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 adsorbent 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 concentration at a targeted adsorption bed concentration. The targeted adsorption bed concentration is determined such that the product impurity concentration is maintained at product impurity concentration targets. 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 concentrations. Proportional integral control can be used for such purposes.