Circulating controllable groundwater pollution multi-stage enhanced repair system and repair method

Abstract

The invention relates to a circulation controllable type multistage reinforced repairing system for underground water pollution. The system is characterized in that a pumping well is arranged at the center of an underground pollution plume, the pumping well is connected with an underground water distribution tank through a pumping guide pipe, and a water quality sensor and a water level sensor are arranged in the underground distribution tank; a water injection well group comprises a plurality of water injection wells surrounding the underground water plume, a water injection guide pipe is arranged in each water injection well, each water injection guide pipe is connected with the underground water distribution tank through a multistage reinforced treatment unit, and a water level sensor is arranged in each water injection well and connected with an automatic control device; each multistage reinforced treatment unit is divided by triangular distribution retaining plates into a zeolite area, a first-stage reaction area, a second-stage reaction area, a third-stage reaction area and an activated carbon area which are arranged in a staggered manner; the automatic control device is a PLC (programmable logic controller) which is respectively connected with the water quality sensor, the water level sensors, the pumping guide pipe, a transducer and a frequency converter. The invention further discloses a method for repairing the underground water pollution.

Description

technical field [0001] The invention belongs to the field of groundwater pollution restoration, in particular to a circulation controllable groundwater pollution multi-stage enhanced restoration system. [0002] The present invention also relates to a method for repairing groundwater pollution by the above repair system. Background technique [0003] At present, the situation of groundwater pollution in my country is becoming more and more serious, the types of polluted sites are complex and the types of pollutants are many, which put forward higher requirements for groundwater pollution remediation technology. [0004] Groundwater pollution remediation technologies mainly include ectopic extraction treatment and in-situ remediation technology, among which ectopic extraction technology has the characteristics of short remediation period, obvious effect, and strong controllability in practical applications, but its existence is due to the adsorption of the aquifer after remed...

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Problems solved by technology

[0004] Groundwater pollution remediation technologies mainly include ectopic extraction treatment and in-situ remediation technology, among which ectopic extraction technology has the characteristics of short remediation period, obvious effect, and strong controllability in practical applications, but its existence is due to the adsorption of the aquifer after remediation. Tailing caused by re-release of pollutants on particulate matter

[0005] In-situ treatment technologies are divided into in-situ air injection, in-situ microorganisms, and permeable reactive walls (PRB), etc. In particular, PRB technology has been widely concerned in groundwater remediation technology. Remediation of contaminated groundwater, but also has its own limitations

This technology requires the groundwater to reach a certain flow rate to ensure that the groundwater can pass through the set wall. In addition, because of the need to set the wall material, it is necessary to excavate a trench with a corresponding depth on the site, and the depth of the trench is generally based on the depth of the aquifer. Therefore, PRB technology is not suitable for low-permeability sites or sites with deep groundwater in actual engineering

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