Aeration backflow type groundwater pollution remediation device

Abstract

The invention discloses an aeration backflow type groundwater pollution remediation device, which belongs to the technical field of groundwater remediation and comprises an air guide pipe arranged inan underground well, the bottom end of the air guide pipe is fixedly connected with a middle plate, and mounting holes are formed in the two ends of the middle plate. An air outlet pipe is fixedly connected into the mounting hole, an aeration cover is connected to the air outlet pipe in a sleeving manner, a plurality of uniformly distributed spray heads are fixedly connected to the side wall of the aeration cover, an outer ring is fixedly connected to the outer wall of the air guide pipe, the outer ring comprises a bottom plate, a pair of middle plates are fixedly connected to the bottom plate, a preprocessor is fixedly connected to the top end of the air guide pipe, when underground water is aerated, airflow carries a repairing agent to enter an underground water channel, airflow layers covering the end face of a middle plate are formed at the two ends of the middle plate inserted into the underground water channel, and water flow penetrating through the middle plate makes full contact with airflow so as to eliminate pollutants in the water flow.

Description

technical field [0001] The invention relates to the technical field of groundwater restoration, in particular to an aeration-backflow type groundwater pollution restoration device. Background technique [0002] Volatile / semi-volatile organic pollution and heavy metal pollution in soil and groundwater are the main pollution forms of industrially polluted sites in my country. Organic pollution of shallow contaminated soil and groundwater is widespread, and ex situ remediation technology is likely to cause secondary pollution due to excavation and transportation. Therefore, in situ remediation technology has gradually received attention and has become a research hotspot. [0003] In-situ aeration restoration technology is mainly aimed at highly volatile organic pollutants in groundwater, such as in-situ aeration restoration of groundwater BTEX. However, there are also some deficiencies in in-situ aeration. The influence radius of the aeration well is limited, and the collectio...

AI Technical Summary

Problems solved by technology

However, there are also some deficiencies in in-situ aeration. The influence radius of the aeration well is limited, and the collection system for blowing and degassing is not effective. Increased workload, poor repair results

Especially when the groundwater is polluted but the aeration zone is not polluted, the use of in-situ aeration at this time will cause the polluted gas to enter the aeration zone, and a large amount of pollutants will be absorbed by the natural organic matter in the aeration zone, which will lower the recovery efficiency

[0004] However, most of the current groundwater remediation uses chemicals to restore the groundwater, but the agents will be drained away with the flowing groundwater when they are put into the water, and cannot fully contact with the groundwater. They can only contact the groundwater in the upper layer, and the repair effect on the groundwater in the lower layer is not good. And the residue after treatment will still be partially dissolved in the water body, thus affecting the quality of the water body

Images