Circulation well and method for removing pollutants out of underground water

Abstract

The invention discloses a circulation well and method for removing pollutants out of underground water. The circulation well comprises a well body, wherein the well body comprises an inner well and an outer well; an upper-layer screen pipe and a lower-layer screen pipe are arranged at the upper end and the lower end of the wall of the inner well; water in the inner wall and the outer well circulates through the upper-layer screen pipe and the lower-layer screen pipe; the inner well is provided with at least two water filter segments along the vertical direction; the upper water filter segment is separated from the lower water filter segment through a solid column body and is sealed through a packer; a seal cover is arranged at the top of the well body; and the well body is provided with an aeration system for aerating the inside of the well body, a blow-off system for blowing off gas in the well body, a vacuum extraction system for extracting the gas in the well body, a multi-medium filter system for treating the gas extracted from the inside of the well body, a dosing system for treating polluted underground water in the well body, and a heavy metal treatment system for treating heavy metals in the polluted water. The polluted water is treated through the circulation well in situ, the interference with the ambient environment is reduced and organic matters and the heavy metals in the underground water are effectively removed.

Description

technical field [0001] The invention relates to the technical field of soil remediation, more specifically, it relates to a circulation well and a method for removing pollutants in groundwater. Background technique [0002] In the treatment of contaminated soil, the groundwater of the contaminated soil site must be treated. If the contaminated soil site after the relocation of many chemical or pesticide companies does not undergo groundwater treatment, the soil treatment work has not been completed at all. Groundwater is an important source of drinking water and a strategic resource. With the rapid development of economy and society, the pollution of groundwater around some cities and industrial enterprises is showing a worsening trend, seriously threatening the safety of groundwater drinking water sources. [0003] The publication numbers in the prior art are CN104193076A, CN104129877A, and CN10415069A, which disclose the process of using aeration in the advanced oxidation ...

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Problems solved by technology

[0003] The publication numbers in the prior art are CN104193076A, CN104129877A, and CN10415069A, which disclose the process of using aeration in the advanced oxidation treatment system to degrade organic matter in groundwater, and then absorb most of the organic matter or heavy metals in groundwater through an adsorption layer containing red mud molecular sieve and activated carbon. , but the above process also needs to use photocatalysts and ultraviolet lamps to form an advanced oxidation treatment system, which increases the cost and the difficulty of system maintenance. It is necessary to excavate a lifting well instead of using the original irrigation machine well, and an advanced oxidation treatment system needs to be built around the lifting well. The treatment system increases the cost of infrastructure construction, and the advanced oxidation treatment system is a fixed bed mode of packing, which is difficult to recover when the packing layer fails, and is difficult to be practically applied

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