A multi-level repair system and repair method for metal-contaminated soil

Abstract

The invention discloses a multi-stage remediation system for metal contaminated soil and a remediation method thereof. The multi-stage remediation system comprises a soil crushing device, a first-stage elution remediation device, a second-stage elution remediation device and a third-stage elution remediation device, wherein the soil crushing device is arranged above the first-stage elution remediation device and toward the feeding inlet of the first-stage elution remediation device for feeding; the feeding inlet of the second-stage elution remediation device communicates with the discharge outlet of the first-stage elution remediation device; and at least one third-stage elution remediation device is in head-to-tail connection in series to communicate with the discharge outlet of the second-stage elution remediation device. According to the invention, through elution remediation of a plurality of stages of elution remediation devices to soil in a container, the degree of remediation sufficiency to the soil can be improved; meanwhile, compared with a leaching system, the multi-stage remediation system provided by the invention can greatly reduce the loss and waste of a remediation agent solution, and improves the utilization rate of the remediation agent solution.

Description

technical field [0001] The invention belongs to the field of soil remediation, in particular to a multi-level remediation system and a remediation method for metal-contaminated soil. Background technique [0002] In recent years, soil remediation technology has been more and more widely used. Among them, the chemical remediation method of ectopic remediation is the most widely used and has the best effect. However, at present, most of the ectopic chemical methods are leaching through the conveyor system. This process causes the equipment of the soil remediation device to occupy a large area, the loss of the remediation agent is large, and the remediation of the soil is not sufficient. Contents of the invention [0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a multi-level repair system and repair method for metal-contaminated soil, which can effectively improve the utilization rate of the repair agent...

AI Technical Summary

Problems solved by technology

[0002] In recent years, soil remediation technology has been more and more widely used. Among them, the chemical remediation method of ectopic remediation is the most widely used and has the best effect. However, at present, most of the ectopic chemical methods are leaching through the conveyor belt system. This process resulted in a large footprint of the soil remediation device, a large loss of remediation agent, and insufficient soil remediation.

Images