High speed pressure swing adsorption liquid oxygen/liquid nitrogen generating plant
US4957523A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/939
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for producing high purity oxygen and nitrogen in the liquid and gaseous phases. The apparatus is a modular, mobile system employing a low design operating pressure. The system purifies ambient air through filters and a dual immobilized fixed bed molecular sieve type pressure swing adsorber prior to the cryogenic distillation of the air. Through the incorporation of the pressure swing adsorber having a high frequency regeneration cycle, the disclosed system provides a reduced system size. The configured system employs waste gas from the distillation process to purge the pressure swing adsorber. The cryogenic distillation procedure includes a heat exchanger, a turboexpander, high and low pressure distillation columns, a subcooler and a condenser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.