Arrangement for driving out of volatile impurities from ground water
US5220958A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1991 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Aug 15, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C2101/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An arrangement for driving out of volatile impurities from ground water and a ground region through which the ground water flows has a well shaft extending to a region with contaminated ground water, and a nozzle member for introducing a gas into the ground water in the shaft. The nozzle member is formed by a sieve wall portion of the well shaft arranged above a ground water level in the ground region, so that it can be located at least partially underneath the ground water during a raising of the ground water level in the well shaft under the action of a negative pressure produced in the well shaft, and a filter insert arranged upstream of the sieve wall portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.