Normal-pressure chemical oxidation injection device for underground water

Abstract

The invention discloses a normal-pressure chemical oxidation injection device for underground water. The normal-pressure chemical oxidation injection device comprises a dispensing tank, a chemical conveying pipe, a chemical injection pump and an injection well, wherein the injection well is arranged in a polluted area, an input port of the chemical injection pump is communicated with the dispensing tank, and an output port of the chemical injection pump is connected to the injection well through the chemical conveying pipe; a flowmeter, a pressure gauge and a valve are arranged on the chemicalconveying pipe; the injection pressure of the chemical injection pump is 0.1-0.2 MPa; the distance between the injection wells is determined according to the underground water flow velocity of the polluted area. According to the technical scheme, the chemical is diffused to cover the polluted area under natural conditions, so that the effect of removing pollutants is achieved, the reaction efficiency is improved, and the undesirable phenomena of uneven chemical diffusion, ground slurry return and the like caused by over-high injection pressure are avoided.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a groundwater atmospheric pressure chemical oxidation injection device. Background technique [0002] Groundwater is an important part of freshwater resources and plays a pivotal role in the development of human society. However, industrial wastes are piled up randomly, large-scale use of pesticides and fertilizers, leakage during oil extraction, transportation, loading and unloading, storage, processing and use are all Serious water and soil pollution has been caused, and the main source of organic pollution of groundwater is the leakage of petroleum and petroleum products. [0003] Aiming at the organic pollution of groundwater, some remediation technologies have also been proposed accordingly. Extraction treatment technology is one of the most common ectopic remediation technologies for groundwater organic pollution. This technology is effective in removing ...

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Problems solved by technology

The reaction of Fenton’s reagent is violent, and the oxidation reaction can be completed within 2 hours. The waste of reagents during use is serious, and its reaction product contains a large amount of Fe(III) precipitates, which will seriously block the injection well and aquifer. In situ well injection technology is not suitable Fenton's reagent

Permanganate can maintain the reaction ability of one to two days in the underground environment, and has a certain degree of persistence, but the manganese dioxide, the product of permanganate reduction, is sediment, which also has the risk of clogging the aquifer and injection well, so it is not suitable select

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