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A system and application method for in-situ remediation of polluted soil

A technology for polluted soil and in-situ remediation, which is applied in the field of systems for in-situ remediation of contaminated soil, can solve the problems of reduced leaching efficiency, affecting the popularization and application of shaft leaching technology, and achieves improved suction efficiency and is conducive to large-scale implementation. The effect of leaching, which is beneficial to the promotion and application

Active Publication Date: 2021-03-23
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the combined action of the liquid injection pump and the vacuum pump, the soil between the liquid pumping well and the liquid injection well is likely to form a seepage channel (short circuit phenomenon) during the liquid pumping process, resulting in the inability of the eluent to interact with the particles adsorbed on the soil particles. Full contact with heavy metals leads to a great reduction in the efficiency of leaching in the later stage, which affects the popularization and application of shaft leaching technology

Method used

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  • A system and application method for in-situ remediation of polluted soil
  • A system and application method for in-situ remediation of polluted soil
  • A system and application method for in-situ remediation of polluted soil

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Effect test

Embodiment 1

[0033] Such as figure 2 , Figure 4 , Figure 5 Shown: a system for in-situ remediation of contaminated soil, including a freezer 7, a liquid injection pump 8, a vacuum pump 5, a steam-water separator 6, several temperature sensors and a freeze-thaw rinsing unit, a freeze-thaw leaching unit The washing unit includes two liquid injection drainage plates 2, two liquid extraction drainage plates 3 and a freezing pipe 4, and the two liquid extraction drainage plates 3 are symmetrically arranged on the outside of the freezing pipe 4 with the freezing pipe 4 as the center. The liquid injection and drainage plate 2 described above is symmetrically arranged on the outside of the liquid suction and drainage plate 3 with the freezing pipe 4 as the center, and the temperature sensors are arranged at equal intervals between the freezing pipe 4 and the liquid injection and drainage plate 2; the refrigerator 7 passes through the pipeline Connect to the freezing tube 4, the freezing tube ...

Embodiment 2

[0042] Such as Figure 2 to Figure 4 As shown, a system for in-situ remediation of contaminated soil includes a freezer 7, a liquid injection pump 8, a vacuum pump 5, a steam-water separator 6, several temperature sensors and two freeze-thaw rinsing units, one freeze-thaw The rinsing unit includes two liquid injection drainage plates 2, two liquid suction drainage plates 3 and a freezing pipe 4, and the two liquid suction drainage plates 3 are symmetrically arranged on the outside of the freezing pipe 4 with the freezing pipe 4 as the center. The liquid injection drainage plate 2 is symmetrically arranged on the outside of the liquid suction drainage plate 3 with the freezing pipe 4 as the center, and the temperature sensors are arranged at equal intervals between the freezing pipe 4 and the liquid injection drainage plate 2; The units are arranged in series, and the two freeze-thaw rinsing units in series share a liquid injection and drainage plate 2. The refrigerator 7 is co...

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Abstract

The invention provides a system for contaminated soil in-situ repairing and an application method thereof. The system for contaminated soil in-situ repairing comprises a refrigerating machine, a liquid injecting pump, a vacuum pump, a steam-water separator, a plurality of temperature sensors and at least one freeze-thaw washing unit. Two liquid pumping drainage plates of each freeze-thaw washing unit are symmetrically distributed on the outer side of a freezing pipe with the freezing pipe as the center, and two liquid injecting drainage plates are symmetrically distributed on the outer sides of the liquid pumping drainage plates with the freezing pipe as the center. According to the system for contaminated soil in-situ repairing and the application method thereof, by adopting a mode of combining artificial freezing and vertical shaft washing, viscid heavy metal contaminated soil is subjected to in-situ repairing, the contaminated soil does not to be dug, in-situ repairing is achieved,the repairing cost is reduced, the problem that the washing efficiency is low in low-permeability clay through a current existing in-situ vertical shaft washing method is solved, the technology is simple, the cost is low, and application and popularization are facilitated.

Description

technical field [0001] The invention relates to the technical field of contaminated soil remediation, in particular to a system and application method for in-situ remediation of polluted soil. Background technique [0002] Soil leaching technology can quickly remove heavy metals from the soil and complete the treatment of high-concentration pollutant soil in a short time. The process is simple, the restoration efficiency is high, and the treatment cost is relatively low. Now it has become one of the main means of rapid restoration technology for contaminated soil . [0003] When the leaching method is used for the remediation of contaminated soil, the soil texture has great restrictions on the use of the leaching method. When the texture is heavy, the permeability coefficient is small, and the clay content exceeds 30%, it is not suitable for the application of the leaching technology. The main reason is It is the strong adsorption of heavy metals by the specific surface are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/02B09C1/00
CPCB09C1/005B09C1/02B09C2101/00
Inventor 芮大虎毋文涛武迎飞武智鹏芦明翟金榜刘剑飞纪明昌郭成
Owner HENAN POLYTECHNIC UNIV
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