| 摘要 |
In the device for removing highly volatile impurities from the ground water by generating an underpressure in a well shaft (10) driven as far as the region of the polluted ground water (20), the vertical flow of the ground water in the well shaft (10) is reinforced and controlled by a screw conveyor (28) arranged in a pipe section (27) forming an extension of a central pipe (16), to which the nozzle unit (21) is secured to distribute the fresh air fed in. The conveyor screw (28) is fitted on a shaft (29), passing through the pipe (16), the nozzle unit (21) and the pipe section (27), which is connected to a motor (30) arranged outside the well shaft on the upper end of the pipe (16). |
