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In-situ chemical remediation method of soil

A chemical remediation and soil technology, which is applied in the field of remediation of contaminated soil, can solve the problems of incomplete decontamination, failure to reach the depth of drilling, and short maintenance time, so as to achieve convenient and flexible sampling analysis and ensure the quality of soil remediation Effect

Active Publication Date: 2014-01-08
SUZHOU LVDI SOIL REMEDIATION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the prior art, in the method of in-situ chemical oxidation repairing soil, the commonly used technology for arranging injection wells is direct push drilling technology (Direct push drilling), which has the following disadvantages: 1. High cost (drilling cost 280 Yuan / m), the drilling speed is slow (only three holes are drilled a day); 2. The maintenance time after drilling is not long, because when drilling, the breathing space of the soil around the hole is stuck to death, and the water cannot come out. Break through the bonding layer and collapse together with mud and water, squeeze the hole, and finally silt, the injection agent cannot reach the original drilling depth, and the decontamination cannot be thorough
The device in this technical scheme is more complicated
Therefore, the method of using this device to chemically remediate soil in situ becomes correspondingly complicated.

Method used

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  • In-situ chemical remediation method of soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see figure 1 , an injection device suitable for in-situ chemical remediation of soil, comprising an inner core 1 and a permeable layer 2 covering the periphery of the inner core, wherein the inner core is made of high-density polyethylene (HDPE) and extruded Processed by forming technology, the shape of the inner core is a long flat plate with a width of 10 cm and a thickness of 0.8 cm; the outer surface of the inner core is provided with axial grooves and / or ribs, and the grooves and / or protrusions The ribs are arranged longitudinally to form a channel, and the raised ribs arranged up and down intersect to form a support can prevent the material of the permeable layer from being embedded in the channel due to the pressure of the external soil;

[0036] The material of the permeable layer is non-woven fabric, and its bristle surface faces outwards to the inner core, and the permeation direction is from the inside to the outside, so that the medicine solution can permeat...

Embodiment 2

[0038] see figure 2 , a system for arranging the above-mentioned injection device, the system for arranging the above-mentioned injection device is a slot machine 3, including a chassis, a main frame, a vibrating hammer, an intubation tube, and a plug, and the plug is arranged at the front end of the intubation tube. The plug is a round plug; the height of the main frame is 15-30 meters, and the depth is 15-24 meters, and the top is equipped with a pulley head for the lifting and landing of the vibratory hammer; the chassis is a crawler chassis.

[0039] The method for in-situ chemical repairing of soil by using the above-mentioned system with injection device, comprises the following steps:

[0040] (1) After the plug-in machine is in place, use the vibrating hammer to align with the socket and sink, and pass the injection device through the cannula to connect with the plug at the front end. After the cannula is removed, leave the injection device in the soil to complete th...

Embodiment 3

[0045] A method of in-situ chemical oxidation repairing soil, such as image 3 shown, including the following steps:

[0046] (1) Site characterization: In order to better design and implement in-situ oxidation technology, it is necessary to fully understand and characterize the geological and hydrogeological characteristics of the remediation site and the temporal and spatial distribution characteristics of pollutants. It mainly includes the nature, concentration and spatial distribution of pollutants, the determination of chemical parameters such as the amount of pollutants (adsorbed, dissolved, by-products), and the soil properties (alkalinity, pH, Eh), composition, water permeability coefficient, Determination of geological parameters such as porosity and groundwater flow direction. Site characterization adopts the method of combining on-site monitoring with sample collection and laboratory instrument analysis, which is a commonly used standard method in this field.

[0...

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Abstract

The invention belongs to the remediation filed of the polluted soil and in particular relates to an in-situ chemical remediation method of soil. The method comprises the following steps: (1) arranging an injection device; (2) injecting drug solution; (3) monitoring and adjusting; (4) repeating the above steps till the remediation of the soil is finished, wherein the injection device is arranged by using a board inserting machine; the injection device comprises an inner core and a permeation layer which coats the periphery of the inner core; the external surface of the inner core is provided with axial grooves and / or convex ribs; the permeation direction of the permeation layer is from inside to outside. Through the in-situ chemical remediation method of soil, the good injection effect can be guaranteed, the structure of the injection device is simplified, the construction speed of the arrangement of the injection device is improved, and the construction cost is lowered.

Description

technical field [0001] The invention belongs to the field of restoration of polluted soil, and in particular relates to a method for in-situ chemical restoration of soil. Background technique [0002] In recent years, due to changes and adjustments in the industrial structure and urban layout, the government has led the relocation of some large polluting enterprises such as chemicals, pesticides, pharmaceuticals, and metallurgy, leaving some polluted sites and soil outside the city. [0003] On the one hand, the government considers that untreated polluted sites will have an immeasurable impact on sustainable development. On the other hand, due to the increasing demand for land in the process of economic development, the government has attached great importance to the prevention of soil pollution in recent years. and contaminated soil remediation, in order to rationally utilize the remediated soil again. [0004] Since the 1980s, many countries in the world, especially deve...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 李兴
Owner SUZHOU LVDI SOIL REMEDIATION TECH CO LTD
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