CN-121972507-A - Heavy metal contaminated soil restoration treatment equipment and method thereof

CN121972507ACN 121972507 ACN121972507 ACN 121972507ACN-121972507-A

Abstract

The invention belongs to the technical field of soil remediation, and particularly discloses heavy metal contaminated soil remediation equipment and a method thereof, wherein the remediation equipment comprises a microbial agent preparation unit and an in-situ injection unit, the in-situ injection unit is provided with a pre-buried matrix, a drainage branch pipe, a guide rail frame and a covering pad, the pre-buried base body is provided with a temporary storage cavity, the drainage branch pipe is wound around the drainage branch pipe and is communicated with the temporary storage cavity, the guide rail frame comprises a thermal insulation area formed by coaxial inner and outer ring guide rails, and the movable rod is arranged between the guide rails in a sliding manner and is connected with the covering pad. According to the invention, the microbial inoculum is uniformly injected into the soil through the drainage branch pipes, meanwhile, the coverage rate of the coverage pad is adjusted by the sliding moving rod, the soil temperature of a microbial inoculum acting area is accurately regulated and controlled, a suitable growth environment is created for functional microorganisms, the microbial activity and the soil restoration efficiency are improved, the device is reasonable in structure, convenient and fast to operate, flexible in coverage rate adjustment, environment-friendly, free of secondary pollution and good in restoration effect, and the coverage rate is adjusted flexibly to adapt to environments with different soil temperatures.

Inventors

KOU LEI
Dai Xuke
TAN XIANGQIAN
ZHANG JUNWEI
ZHANG WENQIAN
LIU SHUN

Assignees

湖北省地质局第七地质大队

Dates

Publication Date: 20260505
Application Date: 20260402

Claims (10)

1. The heavy metal contaminated soil remediation treatment equipment comprises a microbial agent preparation unit and an in-situ injection unit, wherein the microbial agent preparation unit is connected with the in-situ injection unit, and is used for injecting heavy metal contaminated soil to be remediated through the in-situ injection unit, and the in-situ injection unit is characterized by comprising: The bottom of the embedded substrate is embedded in heavy metal polluted soil to be repaired, a temporary storage cavity is formed in the embedded substrate, and the temporary storage cavity is connected with a microbial agent preparation unit; the drainage branch pipes are wound around the periphery of the embedded substrate, are buried in heavy metal polluted soil to be repaired, the inlet ends of the drainage branch pipes are communicated with the temporary storage cavity, the other ends of the drainage branch pipes are closed, a plurality of liquid outlets are formed in the side walls of the drainage branch pipes, and the liquid outlets serve as outlet ends for discharging microbial agents; The guide rail frame comprises an inner ring guide rail, an outer ring guide rail, a plurality of moving rods, a plurality of sliding rods, a plurality of guide rails and a plurality of guide rails, wherein the inner ring guide rail is fixed on the outer side wall of the embedded substrate; The cover pad adopts a flexible pad body, the cover pad is of a circular ring structure and is provided with at least one opening along the radial direction, the end parts of the cover pad positioned at two sides of the opening are fixed on two adjacent movable rods, the bottom surface of the cover pad is fixed on other movable rods, and the end parts of the cover pad are driven by the movable rods to adjust the size of the opening so as to realize the adjustment of the coverage rate of the cover pad above the warm-keeping area.
2. The heavy metal contaminated soil remediation equipment of claim 1, wherein the inner ring guide rail comprises a plurality of inner arc tracks which are connected in sequence, the outer ring guide rail comprises a plurality of outer ring tracks which are connected in sequence, the plurality of outer ring tracks are in one-to-one correspondence with the plurality of inner arc tracks, and the plurality of outer ring tracks are fixed through fixing rods; The fixed rods are two groups, the two groups of fixed rods are respectively used for fixing two ends of the inner arc track and the outer ring track, the two groups of fixed rods, the inner arc track and the outer ring track form a fan-shaped structure, each fan-shaped structure is at least correspondingly provided with one movable rod, and two ends of the movable rod are respectively arranged in the inner arc track and the outer ring track in a one-to-one corresponding sliding manner through the sliding blocks.
3. The apparatus for remediation of heavy metal contaminated soil according to claim 2, wherein said cover mat includes a plurality of fan-shaped mats, said plurality of fan-shaped mats being arranged in a one-to-one correspondence over a plurality of fan-shaped structures, opposite ends of two adjacent fan-shaped mats defining said opening.
4. A heavy metal contaminated soil remediation and remediation apparatus according to claim 3 wherein one of said movable bars is disposed on a corresponding one of said fan-shaped structures, one end of the fan-shaped pad being secured to either of said fixed bars and the other end being secured to the movable bar within said fan-shaped structure.
5. A heavy metal contaminated soil remediation and remediation device according to claim 3 wherein a plurality of said movable bars are correspondingly disposed on said fan-shaped structure, two ends of said fan-shaped pad are respectively fixed to two movable bars located at the edges of said fan-shaped structure, and the middle section of said fan-shaped pad is uniformly fixed to the other movable bars.
6. The heavy metal contaminated soil remediation equipment according to any one of claims 2 to 5, wherein teeth are arranged on the inner arc track and the outer ring track, gears are rotatably arranged on the sliding blocks, the gears are meshed with the teeth, and a driving motor connected with the gears and used for driving the gears to rotate is further arranged on each sliding block.
7. The heavy metal contaminated soil remediation apparatus of claim 6, further comprising a temperature control unit comprising: the temperature sensing module is arranged at the bottom of the embedded matrix and used for collecting temperature signals of soil near the bottom of the embedded matrix; And the control module is electrically connected with the temperature sensing module and the driving motor respectively and is used for receiving the temperature signal and controlling the driving motor to operate.
8. The heavy metal contaminated soil remediation and management apparatus of claim 1, wherein the in-situ injection units have a plurality of groups, the plurality of groups of in-situ injection units correspond to a group of microbial agent preparation units, and temporary storage cavities of each group of in-situ injection units are connected with the microbial agent preparation units.
9. The heavy metal contaminated soil remediation and remediation device of claim 1, wherein the covering mat comprises a heat preservation quilt and straw layers wrapping the periphery of the heat preservation quilt, the straw layers comprise straw bundles and woven rope nets for binding the straw bundles, and the length direction of the straw bundles is consistent with the length direction of the movable rod.
10. A method for repairing and controlling heavy metal contaminated soil, which is characterized by repairing and controlling heavy metal contaminated soil by using the repairing and controlling equipment as claimed in claim 1, comprising the following steps: digging a foundation pit consistent with the bottom of the embedded substrate, and digging liquid drops grooves which correspond to the drainage branch pipes in number and position along the periphery of the foundation pit; placing the pre-buried matrix in the foundation pit, and placing the drainage branch pipes in the drip grooves in a one-to-one correspondence manner; The microbial agent preparation unit is connected with the temporary storage cavity, the microbial agent is injected into the temporary storage cavity, and the sliding moving rod is used for adjusting the covering pad to cover the upper part of the thermal insulation area.

Description

Heavy metal contaminated soil restoration treatment equipment and method thereof Technical Field The invention belongs to the technical field of soil remediation, and particularly relates to heavy metal contaminated soil remediation treatment equipment and a method thereof. Background With the continuous development of human activities such as industrial production, agricultural planting and the like, the problem of heavy metal pollution of soil is increasingly outstanding, so that not only is the ecological structure of the soil destroyed and the fertility of the soil reduced, but also the human health is threatened by the enrichment of food chains, and therefore, the repair of heavy metal pollution of the soil has become an important research direction and urgent need in the field of ecological environment protection. Among the numerous soil heavy metal pollution remediation technologies, the microbial remediation technology is one of the core technologies in the current green sustainable remediation field by virtue of the advantages of environmental friendliness, no secondary pollution, low cost, capability of synergistically improving the microecology of the soil and the like, and is widely applied to the treatment work of large-area medium-low concentration heavy metal pollution soil. The core principle of the microbial remediation technology is that the adsorption, precipitation, oxidation reduction, methylation, demethylation and other functions of functional microorganisms are utilized to change the existence form of heavy metals in soil and reduce the bioavailability and mobility of the heavy metals, so that the purification and remediation of the soil are realized. At present, related microorganism repairing equipment mostly adopts an in-situ injection technology, specifically, functional microorganisms are directly injected into the ground through related equipment on the premise of not digging polluted soil, and degradation/fixation of the microorganisms on pollutants is activated or enhanced, so that in-situ repairing is realized. The existing microorganism repairing equipment has low conversion efficiency after microorganisms are injected into the ground, so that the actual repairing effect is poor. For example, chinese patent application publication No. CN119259674a proposes an underground intelligent repair device for repairing heavy metal contaminated soil by discharging a repair medium into the soil only through related devices, and it does not consider the temperature environmental factors inside the soil, resulting in lower actual repair efficiency of the heavy metal contaminated soil by the repair medium. And if the Chinese patent application with the publication number of CN221515609U moves out of a fungus liquid soil applying device, the treatment of the heavy metal contaminated soil is realized by injecting the treatment liquid medicine into the ground, the temperature environment factors in the soil are not considered, and the problem of lower practical repair efficiency exists. Disclosure of Invention Aiming at the problems, the invention aims to provide heavy metal contaminated soil restoration treatment equipment and a method thereof, which can regulate and control the soil temperature of a microbial agent action area, create a proper growth metabolism environment for functional microorganisms, improve the restoration activity of the microorganisms and further improve the restoration efficiency and effect of heavy metal contaminated soil. The technical scheme is that the heavy metal contaminated soil remediation treatment equipment comprises a microbial agent preparation unit and an in-situ injection unit, wherein the microbial agent preparation unit is connected with the in-situ injection unit and is used for preparing microbial agents, the in-situ injection unit is used for injecting heavy metal contaminated soil to be remediated, and the in-situ injection unit comprises a pre-buried substrate, a drainage branch pipe, a guide rail frame and a covering pad. The bottom of the embedded matrix is embedded in heavy metal polluted soil to be repaired, a temporary storage cavity is formed in the embedded matrix, and the temporary storage cavity is connected with a microbial agent preparation unit. The drainage branch pipe has a plurality ofly, and a plurality of drainage branch pipes are around establishing at pre-buried base member, and the drainage branch pipe is all buried in the heavy metal contaminated soil that waits to repair, and the entrance point and the cavity of keeping in of drainage branch pipe communicate, and the other end of drainage branch pipe is sealed, has seted up a plurality of liquid outlets on its lateral wall, and the liquid outlet is used for discharging microbial inoculum as the exit end. The guide rail frame comprises an inner ring guide rail, an outer ring guide rail and a moving rod. The inner ring guide rail is fixed on the outer side wall of the embedd