Systems and methods for production of high pressure oxygen
US6718795B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2290/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Systems and methods are disclosed for the power efficient production of high-pressure gaseous oxygen product. In a preferred embodiment, a liquid oxygen stream is pumped to a low to medium pressure and warmed within a first heat exchanger such as a brazed aluminum plate fin heat exchanger. The liquid oxygen stream is then pumped to a further pressure and then vaporized in a second heat exchanger to produce a high-pressure gaseous oxygen stream. In an embodiment, a high-pressure air stream may be utilized in the second heat exchanger for vaporizing the oxygen stream and cooling the air stream. The air stream may be utilized as a feed for the cryogenic air unit. A portion of the air stream at a medium pressure may be utilized in the first heat exchanger. A portion of the air stream may also be expanded to recover energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.