In-situ reagent injection remediation method for soil and underground water pollution

Abstract

The invention discloses an in-situ reagent injection remediation method for soil and underground water pollution. According to the invention, integrated equipment is adopted for in-situ reagent injection remediation, and the equipment comprises a power system, a detection system, an injection system, a dispensing system and an auxiliary system, wherein the power system comprises an engine, a powercontrol mechanism, a gearbox and a generator; the detection system comprises a probe, a feeler lever and a computer; the injection system comprises an injection pump, an injection rod, an injection head, an injection control mechanism, an injection hydraulic device and an injection trolley platform; the dispensing system comprises a reagent dissolving tank, a stirring mechanism, a reagent addingand metering mechanism and a dispensing trolley platform; and the auxiliary system comprises a rod piece box, a crawler chassis, a downward-pressing hydraulic device and a downward-pressing mechanism.According to the method, a set of the integrated equipment is used for in-situ reagent injection remediation of soil and underground water pollution, so remediation efficiency can be improved, and time and capital cost are saved.

Description

technical field [0001] The invention relates to an in-situ medicament injection method used in the field of contaminated site restoration, in particular to an in-situ medicament injection repair method for soil and groundwater pollution. Background technique [0002] Soil and groundwater are important environmental media and an important material basis for human production and life. The process of rapid economic development is also accompanied by pollution problems such as industrial chemical leakage and excessive use of agricultural chemicals, which have caused the deterioration of the soil and groundwater environment. In order to reduce human health risks and avoid damage to the ecological environment, it is necessary to use appropriate technical means to remediate and restore polluted soil and groundwater. [0003] The in-situ injection restoration of soil and groundwater can achieve the purpose of restoration by injecting remediation agents into soil or groundwater cont...

AI Technical Summary

Problems solved by technology

[0004] The injection rod direct-push repair agent injection device is usually composed of a separate agent mixing barrel on the ground, an injection pump, an injection rod pressing device, an injection rod, and an injection head. Manual assembly and connection are generally used between various devices, and the integration degree is poor. When replacing the injection area, it is often necessary to move the equipment separately and reassemble the equipment. The overall mobility and flexibility are poor, and it cannot serve repair projects with tight schedules.

[0005] In the implementation of the restoration project using the direct-push agent injection process, the injection construction parameters such as injection volume, injection pressure and flow rate are mainly designed and determined based on the overall parameters of the site determined by the results of the preliminary engineering geological survey, which is limited by the accuracy of the geological survey. This design is very susceptible to the influence of local stratum heterogeneity, and there is a problem that the uniform injection design parameters of the whole site do not match the actual small-scale stratum conditions, resulting in slurry and short flow during on-site injection construction, resulting in waste of chemicals or secondary Pollution, or the problem of insufficient local injection volume and difficult to guarantee the repair effect, the overall repair efficiency is poor

In addition, the current method of pressing down the injection rod during the injection process of the medicine mainly adopts the vibration and percussion type of pressing down, which is likely to cause lateral disturbance during the pressing down process, resulting in gaps between the injection rod and the surrounding soil layer, which is more likely to cause the problem of slurry during injection construction

Images