Enhanced gas-phase extraction remediation method for chlorobenzene-contaminated soil

A technology of polluted soil and remediation method is applied in the field of enhanced gas-phase extraction and remediation of chlorobenzene-contaminated soil, which can solve the problems of long remediation time and low efficiency, and achieve the effect of high pollutant removal rate and obvious effect.

Active Publication Date: 2015-12-09
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of chlorobenzene-contaminated soil remediation effect is obvious in a short period of time, the chlorobenzene-contaminated soil with high pollutant removal rate strengthens gas phase extraction remediation method, to overcome the long remediation time of traditional gas phase extraction technology , low efficiency and other shortcomings

Method used

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  • Enhanced gas-phase extraction remediation method for chlorobenzene-contaminated soil
  • Enhanced gas-phase extraction remediation method for chlorobenzene-contaminated soil
  • Enhanced gas-phase extraction remediation method for chlorobenzene-contaminated soil

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Embodiment 1

[0025] Such as figure 1 , figure 2 As shown, the heating extractor A in the present invention includes an extraction tube 1 and a heating tube 3, the heating tube 3 is placed in the extraction tube 1, a heating source is housed in the heating tube 3, and the heating source is a plurality of electric heating wires, There are two power wires 6 at the upper end of the heating tube, and the upper end of the heating tube 3 is fixed on the extraction tube 1 through the heating tube connecting nut 5; the annular area around the heating tube in the extraction tube 1 is filled with fillers and catalysts 2. The inner wall of the tube is provided with a layer of metal mesh 8 whose mesh size is smaller than that of the filler and the particle size of the catalyst. There are multiple rectangular openings on the extraction tube shell, namely the extraction tube shell opening 7; the upper part of the extraction tube has an extraction connection. Tube 4 is used to connect the vacuum pump. ...

Embodiment 2

[0027] Such as image 3 Shown, a kind of chlorobenzene polluted soil of the present invention strengthens the small-scale test device of gas-phase extraction repairing device, and it comprises a container 11, and the contaminated soil of filling site is used for small-scale test in the container, and the central part of container is vertically installed as implementing The heating extractor A described in Example 1, except that the upper ends of the extraction tube 1 and the heating tube 3 are exposed outside the soil, the remaining parts are inserted in the contaminated soil in the container; there are two thermocouples 9, one inserted In the extraction pipe 1, it is used to control the temperature of the heating pipe 3; the other is inserted into the contaminated soil in the container 11, and is used to control the temperature at the edge of the soil; two numerical temperature controllers 10 are connected to two thermocouples 9 for The control of temperature; There are two g...

Embodiment 3

[0029] Such as Figure 4 Shown, a kind of chlorobenzene polluted soil of the present invention strengthens gas-phase extraction remediation device, it comprises a plurality of heating extractors A as described in embodiment 1 arranged in equilateral triangle, the extraction of all these heating extractors A The connecting pipes are connected together and merged into a common connecting pipe 17, which is sequentially connected with the condensing unit 12, the gas-liquid separator 14 and the vacuum pump 15; A thermocouple 9 for temperature, a numerical temperature controller 10 connected to the thermocouple; and a thermocouple 9 inserted into the polluted soil for controlling soil edge temperature, and a numerical temperature controller 10 connected to the thermocouple.

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Abstract

The invention discloses a chlorobenzene contaminated soil strengthening gas phase repairing device, an underbrush device thereof, and a method of processing the chlorobenzene contaminated soil by utilizing the repairing device. The repairing device comprises multiple heating extractors which are arranged in a regular triangle or square manner, wherein the heating extractors comprise heating sources and extracting pipes, the heating sources are arranged in extracting pipes, and the heating sources are resistance wires; paddings and catalysts are arranged in the extracting pipes, and opening holes are formed in shells of the extracting pipes; the inner walls of the extracting pipes are provided with grids, extracting connecting pipes of all the heating extractors are connected together and are connected with a condensation unit, a gas-liquid separator and a vacuum pump in sequence, and the underbrush device also comprises a container for packing soil, heating extractors, a thermocouple and a numerical value temperature controller. The method comprises the following steps of distributing the multiple heating extractors in the middle of a repairing place at intervals being 2-5 meters according to a regular triangle or the square, intermittently extracting, controlling the temperatures of the heating sources at 400 DEG C, and heating 120 hours. The chlorobenzene contaminated soil strengthening gas phase repairing device, the underbrush device thereof and the method provided by the invention have the advantages that the repairing effect of chlorobenzene contaminated soil is obvious in short time, and the removal rate of a contaminant is high.

Description

technical field [0001] The invention belongs to the technical field of remediation and treatment of contaminated soil, and in particular relates to a method for intensified gas phase extraction and remediation of chlorobenzene-contaminated soil. Background technique [0002] As a special type of soil pollution, volatile organic compounds in soil are not only complex in composition, but also have pollution characteristics and hazards different from other pollutants, so they are listed as toxic pollution with high potential danger in the environment and should be controlled first. things. Among them, chlorobenzene is also included in the ranks of volatile organic compounds because of its boiling point of 132.2°C. [0003] Chlorobenzene is a volatile synthetic organic compound and is an important organic solvent and chemical raw material. Used as fiber swelling agent, dye carrier, etc. in textile processing; used as insecticide solvent in agriculture; used as paint solvent an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/06
Inventor 罗启仕朱杰刘小宁高洁卢聪张长波孟梁林匡飞刘莉莉
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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