Well pipe device used for mixed injection of multiple medicaments

Abstract

The invention provides a well pipe device used for mixed injection of multiple medicaments and belongs to the field of environmental remediation. The well pipe device is arranged as a single well pipe or is connected through a plurality of well pipes. Each well pipe is of a double-layer hollow casing pipe structure and comprises an inner pipe, an outer casing pipe, first injection pipes, second injection pipes, an inner cavity and an outer cavity; the outer casing pipe is arranged outside the inner pipe in a sleeving mode; the outer cavity between the inner pipe and the outer casing pipe and the inner cavity in the inner pipe form two relatively closed spaces; the inner cavity and the outer cavity are used for transmitting the different medicaments and are each provided with the multiple sets of first and second injection pipes with relative angles; the first injection pipes and the second injection pipes are all directly connected to the outside of the pipe wall of the outer casing pipe; and the first injection pipes do not communicate with the outer cavity. According to the well pipe device used for mixed injection of the multiple medicaments, underground mixing of the multiple medicaments can be achieved; mutual reaction consumption between the medicaments before the medicaments make contact with pollutants is reduced; the medicament utilization rate is increased; the cost is reduced; and the in-situ remediation effect is also greatly improved.

Description

technical field [0001] The invention relates to a design of a mixed injection well pipe used for soil and groundwater pollution restoration, in particular to a well pipe device used for mixed injection of various medicaments, and belongs to the technical field of environmental restoration. Background technique [0002] At present, soil and groundwater remediation technologies mainly include ex-situ remediation and in-situ remediation. Ex-situ restoration means excavating, transporting, and repairing contaminated soil. This restoration method not only involves a large amount of work, but also introduces secondary pollution to the polluted site and the surrounding environment. It may also cause odorous products produced by microorganisms to cause harm to surrounding residents. influences. [0003] Compared with ex-situ restoration, in-situ restoration has the advantages of protecting the original landform of the site, less damage to the stratum structure, not affecting second...

AI Technical Summary

Problems solved by technology

However, the reaction speed of the main agent and the activator is very fast. If it is mixed in advance and then injected, the oxidative property will be greatly reduced before it comes into contact with the pollution, and effective hydroxyl radical OH cannot be produced well, and the effect of repairing pollutants is also low. will be much lower than expected

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