Indoor experiment device for simulating polluted underground water flowing through permeable reaction wall

Abstract

The invention discloses an indoor experiment device for simulating polluted underground water flowing through a permeable reaction wall, and belongs to the field of underground sewage treatment. The indoor experiment device comprises an upright permeable reaction column. The permeable reaction column comprises a shell and a permeable adsorbing and shielding reaction wall. An inner cavity of the shell is filled with the permeable adsorbing and shielding reaction wall. The permeable adsorbing and shielding reaction wall comprises a water injection section and a permeation section. The water injection section comprises an auxiliary shielding material layer attached to the inner wall of the shell, and is provided with a polluted liquid filling hole which is axially communicated with the auxiliary shielding material layer. The indoor experiment device has the advantages that the process of full solid-liquid reaction between an adsorbing and shielding material in the permeable adsorbing and shielding reaction wall and the polluted underground water is simulated accurately, influences of different seepage speeds on removal effect of the adsorbing and shielding material are researched conveniently, assessment of safety adsorption volume of the shielding material under dynamic conditions is benefited, and the important basis is provided for design and engineering implementation (particularly factors such as the seepage speeds, radial width, longitudinal thickness, consumption and replacement time of the adsorbing and shielding material, and the like) of outdoor permeable reaction walls.

Description

technical field [0001] The invention belongs to the field of underground sewage treatment, in particular to an indoor experimental device for simulating polluted groundwater flowing through a permeable reaction wall. Background technique [0002] Water is the source of life, and groundwater is an important part of water resources, which has far-reaching significance for the survival and development of human beings and social economy. The remediation of groundwater pollution is a major hot topic in the field of international environmental research. [0003] The permeable adsorption barrier reactive wall is an in-situ passive remediation technique consisting of a water-permeable reactive medium, generally installed downstream of the groundwater contamination plume, usually perpendicular to the groundwater flow, and it can also serve as a surface for contaminated groundwater treatment facility. When the groundwater passes through the adsorption barrier reaction wall under the...

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Problems solved by technology

[0005] The common deficiency of the filling method of the above experimental column device is that because of the weaker permeability of the barrier adsorption material layer, part of the contaminated liquid will not flow through the lower permeable reaction column and directly seep down the column wall of the columnar shell (such as figure 2 As shown, part of the polluted liquid will seep downward along the inner wall of the columnar shell in the direction of the arrow) and cause the polluted liquid to leak directly to the outside. Therefore, the experimental results of this experimental column cannot truly reflect the adsorption effect of the barrier material

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