Air flow control circuit for sustaining vacuum conditions in a contaminant extraction well
US6024868A · kind A · utility
3Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1997 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Aug 28, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C2101/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention discloses a method and apparatus for extracting contaminants from the ground using a vacuum extraction process. Specifically, the invention discloses a circuit that can control the flow of atmospheric air into a vacuum extraction well. By controlling the air flow into the well, the air flow circuit serves to regulate the vacuum that is applied to sub-surface contaminants. This vacuum lifts the contaminated effluent from the ground, so it can be subjected to further processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.