Process and installation for the production of gaseous oxygen under pressure at a variable flow rate
US5526647A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1995 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Apr 19, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/913
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a process for the production of gaseous oxygen under pressure at a variable flow rate, of the type in which air is distilled in an air distillation installation comprising a distillation apparatus (7) and a heat exchange line (6) to cool the air by heat exchange with the products from the distillation apparatus; liquid oxygen is withdrawn from this apparatus, brought to a vaporization pressure, vaporized and reheated under this pressure in the heat exchange line, this vaporization and this reheating being accompanied by a liquefaction of air in the air liquefaction passages (21; 21,21A) of the heat exchange line. During a reduction of the demand for gaseous oxygen under pressure, relative to the nominal flow rate, excess oxygen produced by the distillation apparatus is withdrawn from this apparatus, in liquid phase, sent to a receptacle (11) for the storage of liquid oxygen, and there is introduced into the distillation apparatus (7) a previously stored (in 13) corresponding additional quantity of liquid air; and during an increase in the demand for gaseous oxygen under pressure relative to the nominal flow rate, the required excess oxygen is withdrawn, in liquid phase, from the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.