A drill pipe device for mixed injection of multiple medicaments

Abstract

The invention discloses a drill pipe device for mixed injection of various medicaments. The drill pipe device comprises an outer pipe, an inner pipe and a drill bit. Both the outer pipe and the inner pipe are of hollow structure and sleeved together, and a gap between the outer pipe and the inner pipe forms a first cavity. The upper portion of the outer pipe is provided with a first medicament connecting hole which is communicated with the first cavity. The inner wall of the bottom of the outer pipe is provided with a step, and the first cavity is closed by the step and the outer wall of the inner pipe together. The upper portion of the inner pipe is provided with a second medicament connecting hole which is communicated with a cavity of the inner pipe. The drill bit is connected with the outer pipe, and a second cavity is formed inside the drill bit and is communicated with the cavity of the inner pipe. Jet holes communicated with the outside are respectively formed in the side walls of the first cavity and the second cavity. The drill pipe device for injection in situ of soil and underground water realizes underground mixing of various medicaments, reduces interaction consumption before the medicaments contact with pollutants, and improves effect of in-situ repair.

Description

technical field [0001] The invention relates to a design of a mixed injection drill rod used for soil and groundwater pollution restoration, and belongs to the technical field of environmental restoration. Background technique [0002] With the rapid development of the economy, the use of a large number of chemical substances has caused soil and groundwater pollution to varying degrees. And due to the leaching of rainwater and the fluctuation of groundwater level, it will also cause cross-contamination of soil and groundwater. In general, typical pollutants in soil and groundwater are: inorganic and organic pollution, including NO 3 - , NH 4 + , heavy metals Pb, Cr, As, etc., benzene series, petroleum hydrocarbons, polychlorinated biphenyls, pesticides, etc. These pollutants are often highly toxic and carcinogenic, so it is necessary to restore these polluted soil and groundwater through reasonable technical means. [0003] At present, soil and groundwater remediation ...

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 oxidizing property will be greatly reduced before contacting the pollutants, 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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