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:
Oct. 01, 2019
Filed:
Oct. 18, 2017
Olivier Dube, Amherst, NY (US);
Cem E. Celik, Grand Island, NY (US);
Thomas A. Mcnamara, East Amherst, NY (US);
Olivier Dube, Amherst, NY (US);
Cem E. Celik, Grand Island, NY (US);
Thomas A. McNamara, East Amherst, NY (US);
PRAXAIR TECHNOLOGY, INC., Danbury, CT (US);
Abstract
The present invention relates to a method of controlling prepurifier cycle time by monitoring ambient COlevel in order to prevent CObreakthrough occurrences caused by extreme instantaneous variations in ambient COlevel. Rather than operating solely by prepurifier design bed capacity, the method of the invention continuously updates bed capacity for the contaminants using the feed temperature, pressure and contaminants composition, calculating the total amount of contaminants that were fed to the prepurifier during the feed step and estimates the perturbation front velocity, i.e., the velocity at which the contaminants front coming from an extreme instantaneous variations of ambient level is going to propagate inside the adsorbents bed. Estimating the perturbation front velocity allows for a more precise estimate of the maximum time remaining for the feed step before starting to experience CObreakthrough. This eliminates the need to switch the online bed unnecessarily early and risking shorter regeneration for the offline bed.