CN1187141C - Method for treating polluted soil and device - Google Patents
Method for treating polluted soil and device Download PDFInfo
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- CN1187141C CN1187141C CNB021478414A CN02147841A CN1187141C CN 1187141 C CN1187141 C CN 1187141C CN B021478414 A CNB021478414 A CN B021478414A CN 02147841 A CN02147841 A CN 02147841A CN 1187141 C CN1187141 C CN 1187141C
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Abstract
The present invention relates to a treating method for contaminated soil. Contaminated soil can be restored after treated for 10 to 60 minutes in ozone of which the concentration is 3 to 30 mg. The present invention also provides a treating device for contaminated soil, which comprises an ozone generator, a soil column treating device and an exhausted ozone decomposition device, wherein an oxygen inlet of the ozone generator is connected with an oxygen source, and an ozone outlet of the ozone generator is connected with an inlet of the soil column treating device; an outlet of the soil column treating device is connected with an inlet of the exhausted ozone decomposition device, and an outlet of the exhausted ozone decomposition device is communicated with the atmosphere. The present invention utilizes ozone to treat contaminants in soil and can decompose the organic contaminants into carbon dioxide, water, and organic intermediate products which are easily dissolved in water and can be degraded in a biochemical mode. Compared with the biologic restoring method which is in general use at present, the present invention is hardly influenced by the type of contaminants, the property of soil and environmental conditions. The restoring time can be greatly shortened, and the restoring cost can be reduced accordingly.
Description
Technical field
The present invention relates to a kind of treatment method of soil contaminated and equipment, mainly is to utilize ozone that contaminated soil is carried out the chemical oxidation reparation, is specially adapted to be subjected to the purification of organic matter (as polycyclic aromatic hydrocarbon etc.) contaminated soil of difficult degradation, toxic, biological utilisation difference.
Background technology
Along with the development of producing, the increasing decent various approach of chemical pollutant enter soil system, as using in a large number of chemical fertilizer and agricultural chemicals, the leakage of crude oil in the oil exploitation process, the unreasonable landfill of poisonous and harmful solid waste has all caused the severe contamination of soil.Soil is in a single day contaminated not only can directly to be influenced crops but also can threaten groundwater quality, so soil pollution has received increasing concern.What application was more in the existing soil remediation technology is biological restoration, but biological restoration has its weak point, and longer as repair time, repairing effect is vulnerable to the influence of factors such as pollutant character, edaphon structure, soil property and environmental condition.Particularly to toxic organic pollution, because its bioavailability is poor, the effect of biological restoration is unsatisfactory.
Summary of the invention
The present invention provides a kind of restorative procedure and equipment that is subjected to organic matter (as polycyclic aromatic hydrocarbon etc.) contaminated soil of difficult degradation, toxic, biological utilisation difference at the problems referred to above, above organic pollution can be decomposed into carbon dioxide, water and organic intermediate product soluble in water, bio-degradable; The present invention is short to the repair time of polluted soil, and running cost is lower.
Technical scheme provided by the invention is a kind of treatment method of soil contaminated, and contaminated soil was handled 10～60 minutes in ozone concentration is 3～30 milligrams every liter ozone atmosphere, can realize the reparation of soil.
The ozone gas flow velocity in above-mentioned feeding contaminated soil space is 0.1～0.5 centimetre of a per second.
The present invention can insert contaminated soil in the one earth pillar treating apparatus; The gas that will contain ozone concentration then and be 3～30 milligrams every liter feeds in the earth pillar treating apparatus, and ozone tail gas enters in the atmosphere after treatment.
The present invention also provides a kind of treatment facility of contaminated soil, comprise ozone generator, earth pillar treating apparatus, ozone tail gas decomposer, the oxygen inlet of ozone generator connects source of oxygen, the ozone outlet of ozone generator is connected with the import of earth pillar treating apparatus, the outlet of earth pillar treating apparatus is connected with the import of ozone exhaust gas treating device, and the outlet of ozone exhaust gas treating device communicates with atmosphere.
The ozone outlet of above-mentioned ozone generator is connected by the import of flowmeter with the earth pillar treating apparatus.
Above-mentioned earth pillar treating apparatus is made of the distribution of gas chamber with ozone gas inlet tube, cylindrical shell with splendid attire contaminated soil of ozone gas outlet pipe, is provided with the screen cloth of separating both between cylindrical shell and the distribution of gas chamber.
Treatment facility of the present invention also is provided with three-way pipe, and the ozone outlet of ozone generator is connected with the import of earth pillar treating apparatus with the ozone concentration measurement mechanism respectively by three-way pipe.
The ozone outlet of above-mentioned ozone generator is connected with the import of earth pillar treating apparatus with the ozone concentration measurement mechanism respectively by three-way pipe, flowmeter.
The present invention utilizes the pollutant in the ozone treatment soil, above organic pollution can be decomposed into carbon dioxide, water and organic intermediate product soluble in water, bio-degradable; Compare the influence of contaminated hardly species, soil characteristic and environmental condition with the biological renovation method that generally adopts at present.Can shorten greatly repair time, thereby reduce rehabilitation cost.
Description of drawings
Fig. 1 is the structural representation of the treatment facility of contaminated soil of the present invention;
Fig. 2 is the structural representation of the earth pillar treating apparatus in the treatment facility of contaminated soil of the present invention.
The specific embodiment
Referring to accompanying drawing 1, the present invention includes oxygen cylinder 1, XFZ-5QI type ozone generator 2 (Tsing-Hua University is with favour scientific and technological resources development corporation, Ltd.), triple valve 3, flowmeter 4 and 7, earth pillar treating apparatus 5 (referring to accompanying drawing 2), ozone tail gas decomposer 6 is (referring to Journal of Hazardous Materials, 1995,41,95-104, Elsevier Science B.V.) and ozone concentration measurement mechanism 8 (referring to Journal of Hazardous Materials, 1995,41,95-104, Elsevier Science B.V.), the oxygen inlet of ozone generator 2 connects the outlet of oxygen cylinder 1, the ozone outlet of ozone generator 2 is by three-way pipe 3, flowmeter 4,7 are connected with the import of earth pillar treating apparatus 5 and the import of ozone concentration measurement mechanism 8 respectively, the outlet of earth pillar treating apparatus 5 is connected with the import of ozone exhaust gas treating device 6, and the outlet of the outlet of ozone exhaust gas treating device 6 and ozone concentration measurement mechanism 8 communicates with atmosphere.
Earth pillar treating apparatus 5 of the present invention is made of cylindrical shell 14, the sealing plate 16 of distribution of gas chamber 9, splendid attire contaminated soil.Distribution of gas chamber 9 has ozone gas inlet tube 10 and gas distribution grid 11, and cylindrical shell 14 two ends respectively have flange 12 and 15, and sealing plate 16 has ozone outlet 17.Be connected with gas distribution grid 11 by flange 12 between cylindrical shell 14 1 ends and the distribution of gas chamber 9, the flange 15 of cylindrical shell 14 other ends links to each other with sealing plate 16.Gas enters distribution of gas chamber 9 by inlet tube 10, and evenly enters cylindrical shell 14 by gas distribution grid 11 and stainless steel mesh 13; Ozone gas by cylindrical shell 14 links to each other with ozone tail gas decomposer 6 through ozone outlet 17.
According to technological process of the present invention, at first contaminated soil is inserted in the earth pillar treating apparatus 5.Contain polycyclic aromatic hydrocarbon such as phenanthrene or anthracene in the soil, or chlorinated organics such as 2-chlorophenol etc.
Triple valve is switched to the position of ozone flow and apparatus for measuring concentration 8, open oxygen cylinder 1, regulate flowmeter 7, determine ozone concentration 3～30 mg/litre by ozone concentration measurement mechanism 8 to required hole speed 0.1～0.5 cel.
Switch three-way valve makes and contains ozone gas and enter in the earth pillar treating apparatus 5, regulate flowmeter 4 to required hole speed 0.1～0.5 cel, organic pollution in the soil is carried out oxidation processes, advance ozone tail gas decomposer resolution process by earth pillar treating apparatus tail gas discharged after, enter atmosphere.
Handle polycyclic aromatic hydrocarbon or chlorinated organics in the soil according to the present invention, when the ozone gas flow velocity that feeds the contaminated soil space at 0.1～0.5 cel, ozone concentration is in 3～30 mg/litre, processing time is when being 10～60 minutes, clearance can be up to 80%～93%, if prolong the processing time or/and strengthen gas flow, clearance can be higher.
Application of the present invention is quite extensive, comprising:
(1) reparation of field area contaminated soil purifies.
(2) PETROLEUM PROCESSING industry, chemical industry, pesticide industry, dyeing etc. purify because of problems such as " run, drip, leak " causes the reparation of soil pollution.
(3) gas station, petroleum transportation pipeline leak the reparation purification that causes soil pollution.
(4) because of causing the reparation of soil pollution, the unreasonable applying pesticides in farmland purifies.
The invention will be further described by the following examples.
Embodiment 1: in the present embodiment, soil is by the luxuriant and rich with fragrance pollution of polycyclic aromatic hydrocarbon, and luxuriant and rich with fragrance content is 17 mg/kg, and by the above-mentioned steps operation, handling had 81.9% clearance after 15 minutes.Detail operations condition and result are as follows:
One, operating condition:
Ozone gas flow velocity: 0.16 cel
Ozone concentration: 9.4 mg/litre
Soil moisture: 12%
Pollutant load: 17 milligrams (phenanthrene)/kilogram (dry ground)
Two, experimental result:
| Reaction time (minute) | 1.5 | 5 | 10 | 15 |
| Clearance (%) | 23.9 | 47.4 | 71.4 | 81.9 |
Embodiment 2: in the present embodiment, soil is polluted by the polycyclic aromatic hydrocarbon anthracene, and the content of anthracene is 100 mg/kg, and by the above-mentioned steps operation, handling had 80.4% clearance after 40 minutes.Detail operations condition and result are as follows:
One, operating condition:
Ozone gas flow velocity: 0.40 cel
Ozone concentration: 3.4 mg/litre
Soil moisture: 10%
Pollutant load: 100 milligrams (anthracene)/kilogram (dry ground)
Two, experimental result:
| Reaction time (minute) | 10 | 20 | 30 | 40 |
| Clearance (%) | 39.0 | 61.5 | 72.9 | 80.4 |
Embodiment 3: in the present embodiment, soil is polluted by the 2-chlorophenol, and the content of 2-chlorophenol is 1000 mg/litre, and by the above-mentioned steps operation, handling had 92.2% clearance after 40 minutes.Detail operations condition and result are as follows:
One, operating condition:
Ozone gas flow velocity: 0.32 cel
Ozone concentration: 7.6 mg/litre
Soil moisture: 10%
Pollutant load: 1000 milligrams (2-chlorophenol)/liter (soil moisture)
Two, experimental result:
| Reaction time (minute) | 10 | 20 | 30 | 40 |
| Clearance (%) | 40.9 | 65.1 | 77.3 | 92.2 |
Claims (7)
1. treatment method of soil contaminated is characterized in that: contaminated soil was handled 10～60 minutes in ozone concentration is 3～30 milligrams every liter ozone atmosphere.
2. method according to claim 1 is characterized in that: the ozone gas flow velocity that feeds the contaminated soil space is 0.1～0.5 centimetre of a per second.
3. method according to claim 1 and 2 is characterized in that: contaminated soil is inserted in the earth pillar treating apparatus; The gas that will contain ozone concentration then and be 3～30 milligrams every liter feeds in the earth pillar treating apparatus, and ozone tail gas enters in the atmosphere after treatment.
4. the treatment facility of a contaminated soil, it is characterized in that: comprise ozone generator, earth pillar treating apparatus, ozone tail gas decomposer, the earth pillar treating apparatus is made of the distribution of gas chamber with ozone gas inlet tube, cylindrical shell with splendid attire contaminated soil of ozone gas outlet pipe, is provided with the screen cloth of separating both between cylindrical shell and the distribution of gas chamber; The oxygen inlet of ozone generator connects source of oxygen, and the ozone outlet of ozone generator is connected with the import of earth pillar treating apparatus, and the outlet of earth pillar treating apparatus is connected with the import of ozone exhaust gas treating device, and the outlet of ozone exhaust gas treating device communicates with atmosphere.
5. equipment according to claim 4 is characterized in that: the ozone outlet of ozone generator is connected by the import of flowmeter with the earth pillar treating apparatus.
6. according to claim 4 or 5 described equipment, it is characterized in that: be provided with three-way pipe, the ozone outlet of ozone generator is connected with the import of earth pillar treating apparatus with the ozone concentration measurement mechanism respectively by three-way pipe.
7. equipment according to claim 6 is characterized in that: the ozone outlet of ozone generator is connected with the import of earth pillar treating apparatus with the ozone concentration measurement mechanism respectively by three-way pipe, flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021478414A CN1187141C (en) | 2002-12-16 | 2002-12-16 | Method for treating polluted soil and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021478414A CN1187141C (en) | 2002-12-16 | 2002-12-16 | Method for treating polluted soil and device |
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| Publication Number | Publication Date |
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| CN1415437A CN1415437A (en) | 2003-05-07 |
| CN1187141C true CN1187141C (en) | 2005-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021478414A Expired - Fee Related CN1187141C (en) | 2002-12-16 | 2002-12-16 | Method for treating polluted soil and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417323C (en) * | 2006-06-20 | 2008-09-10 | 郑建秋 | Means for killing harmful bios in horticultural equipment by using ozone |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513345B (en) * | 2012-01-13 | 2013-07-24 | 苏州市环境科学研究所 | Method for treating organic polluted soil |
| CN103357654B (en) * | 2013-08-13 | 2015-01-21 | 山西省环境科学研究院 | Integrated contaminated soil heat treatment system |
| CN103464456B (en) * | 2013-09-16 | 2015-05-13 | 南京盟博环保科技有限公司 | Agricultural soil remediation device |
| CN103624079B (en) * | 2013-12-05 | 2015-08-05 | 沈阳环境科学研究院 | The circulating ozone Oxidation Treatment system of contaminated soil |
| CN103920702B (en) * | 2014-04-04 | 2015-12-09 | 青岛欧帝欧环保科技发展有限公司 | A kind of advanced oxidation reduction innocuity disposal system of waste pollutant and method |
| CN103920703B (en) * | 2014-04-04 | 2016-09-21 | 青岛欧帝欧环保科技发展有限公司 | The advanced oxidation reducing in-situ governing system of a kind of repairing polluted soil and method |
| CN104550225A (en) * | 2014-12-25 | 2015-04-29 | 虢洪根 | Method for improving soil by utilizing two-phase ozone |
| CN111266399A (en) * | 2018-12-04 | 2020-06-12 | 泉州泉港绿笛生态农业有限公司 | Efficient ozone treatment device and method for repairing organic contaminated soil |
| CN112090952B (en) * | 2020-08-29 | 2021-07-27 | 山西大学 | Boiling type micro-foam soil pollution desorption device and method suitable for coking field |
-
2002
- 2002-12-16 CN CNB021478414A patent/CN1187141C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417323C (en) * | 2006-06-20 | 2008-09-10 | 郑建秋 | Means for killing harmful bios in horticultural equipment by using ozone |
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| CN1415437A (en) | 2003-05-07 |
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