Compound type soil and groundwater circulation treatment device

Abstract

The invention relates to a compound type soil and groundwater circulation treatment device which is suitable for high permeability, high aquifer soil pollution groundwater pumping-treatment-reinjection groundwater circulation workplace. The device uses a combination of pumping, water treatment and groundwater reinjection, aiming at polluted soil with high permeability and high water content, to extract the polluted groundwater to a surface water treatment system, and the groundwater flows back to an injection well under the action of gravity after the treatment reaches the standard; meanwhile,during reinjection of the groundwater, groundwater in the groundwater aquifer is timely recharged, and hazardous accidents like ground settlement can be avoided as well; in addition, capillary waterremaining in the entrainment zone which is not easy to be drawn out is also leached or drawn out due to the supply of reinjected water, the remediation effect of groundwater and the aquifer is furtherenhanced, and complete remediation effect can be achieved.

Description

technical field [0001] The invention belongs to the soil and groundwater restoration technology in the field of environmental engineering construction, and in particular relates to a composite cycle restoration device for treating underground polluted water in high-permeability and high-water-content soil. Background technique [0002] Since the second industrial revolution, human activities in the electrical age have exacerbated environmental degradation and destruction, while long-term industrial activities and improper treatment of "three wastes" have directly caused increasingly serious soil and groundwater pollution. Most of the groundwater polluted sites are in the state of multiple / mixed pollution, and its concealment, delay and irreversible characteristics lead to long remediation period, high cost and difficulty. [0003] Japan began to legislate on soil remediation in the 1980s, and was the first country to attach importance to soil remediation. However, the domest...

AI Technical Summary

Problems solved by technology

However, the purification effect of a single remediation technology on soil and groundwater is not obvious, so scholars have carried out research on composite remediation technologies

[0004] When the extraction-treatment technology is used, many remediation difficulties may be faced in the process of extracting polluted groundwater. The main problems include the following three aspects: ① Insufficient water replenishment in some areas due to a large amount of groundwater extraction, resulting in difficulty in extracting polluted groundwater; ② After the high-concentration polluted groundwater in the aquifer is pumped out, the high-concentration capillary water remaining in the aquifer that is not easy to be pumped out will cause pollutants to remain; A large amount of pollutants will remain in the vadose zone, and the process of groundwater pumping does not involve the disposal of the vadose zone

Images