Installation for the cyclic treatment of fluid by adsorption with valves with improved sealing
US6517609B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2000 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Dec 19, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4259
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The gas treatment installation operating on a treatment cycle, in which part of the cycle is performed at a pressure below atmospheric pressure, particularly a PSA, TSA or VSA installation, includes one or more gas treatment vessels containing adsorbent. Each vessel has at least one orifice, at least one gas pipe communicating with the orifice, at least one valve arranged on the gas pipe and controlling the flow of the gas flowing through the pipe. The valve comprises a shaft for operating the valve and sealing elements. A device for maintaining a protective gaseous atmosphere is arranged around the sealing elements and the operating shaft to create and to maintain a protective gaseous atmosphere around these items and thus prevent the ingress, into the treatment vessel, of contaminants harmful to the adsorbent, particularly the ingress of moisture liable to deactivate the molecular sieve, that is to say the adsorbent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.