CN103785680A - Stepping type soil in-situ leaching and stabilization/solidification method - Google Patents
Stepping type soil in-situ leaching and stabilization/solidification method Download PDFInfo
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- CN103785680A CN103785680A CN201410082001.5A CN201410082001A CN103785680A CN 103785680 A CN103785680 A CN 103785680A CN 201410082001 A CN201410082001 A CN 201410082001A CN 103785680 A CN103785680 A CN 103785680A
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Abstract
The invention discloses a stepping type soil in-situ leaching and stabilization/solidification method. According to the method, water injection is conducted on a well A at the center of a site with required pressure, water drawing is conducted on wells 1-6, and water quality change is detected; after the heavy metal concentration of leached water is up to standard and is stabilized, the well 1, the well 4 and the well 6 are taken as water injection wells, water injection continues to be conducted on the well A, and the well 2, the well 3 and the well 5 continue to be taken as water drawing wells; after water quality is up to standard again, the well A, the well 2, the well 3 and the well 5 are taken as water injection wells, the well 1, the well 4 and the well 6 are taken as water drawing wells to continue to be treated with leaching till water quality is up to standard; the well A and the wells 1-6 are all taken as water injection wells, and wells 7-18 are taken as water drawing wells to be treated with leaching till water quality is up to standard; the well A and the wells 1-6 and wells 7-18 are taken as water injection wells and water drawing wells alternately to be treated with leaching till water quality is up to standard. According to the method, the traditional in-situ leaching technique is improved and is combined with the stabilization/solidification technique, and then the risk of dissolving out of pollutants is further reduced.
Description
Technical field
The invention belongs to soil in-situ processing technology field, be specifically related to the drip washing of a kind of step-by-step movement soil in-situ and stabilisation thereof/curing method.
Background technology
Along with country and the more and more attention of the common people to environmental problem, the soil environment protection problem of China progresses into the public's the visual field.Soil and water, atmosphere are the same, are our basis of depending on for existence and development and non-renewable precious resources, once destroyed, be difficult to be resumed.Therefore be, a urgent task to the reparation of contaminated soil.But due to soil itself, rehabilitation cost and reparation difficulty are all very large, country constantly encourages each scientific research institution and business unit's research and development new technology, reduction treatment cost.
The original position drip washing technology of soil is to remove at present the very economical effective method of one of solubility pollutant in soil, the method is taken harmful substance out of to injected water in soil or cosolvent by Injection Well, then drip washing sewage is processed, repeatedly repeated this process until desired value is arrived in drip washing.The stabilization technology of soil refers to by inject stabilization agent in soil, makes pollutant become chemically stable state or indissoluble form, thus the risk that reduces or stop to diffuse out and enter human body from soil.
But due to anisotropism and the soil mechanical composition of soil, drip washing work often can not be accomplished perfection, often there will be certain piece region to fail abundant drip washing, water resource waste and the excessive problem such as power consumption.And the just temporary transient pollutant of controlling of stabilization technology, in the time that condition changes, pollutant has the danger being again discharged in environment.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of drip washing of step-by-step movement soil in-situ and stabilisation/curing method thereof that is mainly used in the following contaminated soil drip washing of phreatic line.
For addressing the above problem, the present invention adopts following technical scheme:
Step-by-step movement soil in-situ of the present invention drip washing and stabilisation thereof/curing method, is characterized in that, comprises the following steps:
1) at A well place, center, place, with the pressure water flooding of needs, 1-6 well draws water, and detects the variation of water quality;
2) until the heavy metal concentration of drip washing water quality up to standard and stable after, using 1,4, No. 6 well as water injection well, simultaneously A well continues water filling, and 2,3, No. 5 wells are continued as pumped well;
3) water quality again up to standard after using A, 2,3, No. 5 wells as water injection well, 1,4, No. 6 well continues drip washing as pumped well, until water quality reaching standard;
4) using A and 1-6 well all as water injection well, 7-18 well carries out drip washing as pumped well, until water quality reaching standard;
5) drip washing is alternately carried out as water injection well or pumped well in A and 1-6 well and 7-18 water well interval, until water quality reaching standard;
6) after drip washing completes, repeat above 5 steps, start to inject stabilization agent in place from center, place A well;
7) will be through step 6) place after treatment, with the direction by inner side, place, lateral, place, progressively inject curing agent by well.
Further, described A well, 1-6 well and 7-18 well are vertical laying.
Compared with prior art, it has following beneficial effect in the present invention: a kind of drip washing of step-by-step movement soil in-situ and stabilisation/curing method thereof that is mainly used in the following contaminated soil drip washing of phreatic line of the present invention; The method is improved traditional original position drip washing technology, and with stabilization technology/solidify combination; First by the most of resolvability pollutant wash-out in soil out, then will be difficult to wash-out part out chemical agent stabilization processes, finally with curing agent, place environment is sealed, further reduce the stripping risk of pollutant.Accompanying drawing explanation
Fig. 1 is well laying structure schematic diagram of the present invention.
The specific embodiment
Embodiment 1
Take the drip washing of the following contaminated site of phreatic line in pollution of chromium place as example, the about 25m of pollution range length, wide about 20m, the about 8m of thickness, groundwater level is in 3m left and right, and contaminated soil of site is prepared leachate according to HJ/T299, and leachate hexavalent chromium concentration scope is 1.5～65mg/L;
1) at A well place, center, pollution of chromium place, with the pressure water flooding of 0.05M handkerchief, 1-6 well draws water, and detects the variation of water quality;
2) until drip washing water quality reach 0.5mg/L and stable after, using 1,4, No. 6 well as water injection well, A well continues water filling simultaneously, and 2,3, No. 5 wells are continued as pumped well;
3) water quality again up to standard after using A, 2,3, No. 5 wells as water injection well, 1,4, No. 6 well continues drip washing as pumped well, until water quality reaching standard;
4) using A and 1-6 well all as water injection well, 7-18 well carries out drip washing as pumped well, until water quality reaching standard;
5) drip washing is alternately carried out as water injection well or pumped well in A and 1-6 well and 7-18 water well interval, until water quality reaching standard;
6), after drip washing completes, at center, place, stabilization agent injects in pollution of chromium place in A well place;
7) will be through step 6) place after treatment, with the direction by inner side, place, lateral, pollution of chromium place, progressively inject stabilization agent by well.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, and any variation of expecting without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (2)
1. the drip washing of step-by-step movement soil in-situ and stabilisation thereof/curing method, is characterized in that, comprises the following steps:
1) at A well place, center, place, with the pressure water flooding of needs, 1-6 well draws water, and detects the variation of water quality;
2) until the heavy metal concentration of drip washing water quality up to standard and stable after, using 1,4, No. 6 well as water injection well, simultaneously A well continues water filling, and 2,3, No. 5 wells are continued as pumped well;
3) water quality again up to standard after using A, 2,3, No. 5 wells as water injection well, 1,4, No. 6 well continues drip washing as pumped well, until water quality reaching standard;
4) using A and 1-6 well all as water injection well, 7-18 well carries out drip washing as pumped well, until water quality reaching standard;
5) drip washing is alternately carried out as water injection well or pumped well in A and 1-6 well and 7-18 water well interval, until water quality reaching standard;
6) after drip washing completes, repeat above 5 steps, start to inject stabilization agent in place from center, place A well;
7) will be through step 6) place after treatment, with the direction by inner side, place, lateral, place, progressively inject curing agent by well.
2. step-by-step movement soil in-situ according to claim 1 drip washing and stabilisation thereof/curing method, is characterized in that: described A well, 1-6 well and 7-18 well are vertical laying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410082001.5A CN103785680B (en) | 2014-03-07 | 2014-03-07 | Stepping type soil in-situ leaching and stabilization/solidification method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410082001.5A CN103785680B (en) | 2014-03-07 | 2014-03-07 | Stepping type soil in-situ leaching and stabilization/solidification method |
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| CN103785680A true CN103785680A (en) | 2014-05-14 |
| CN103785680B CN103785680B (en) | 2017-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159698A (en) * | 2017-06-09 | 2017-09-15 | 航天凯天环保科技股份有限公司 | A kind of method that three-dimensional well elution joint stabilizes in-situ remediation soil polluted by heavy metals |
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| JP2007038175A (en) * | 2005-08-05 | 2007-02-15 | Ohbayashi Corp | Water-running washing structure for polluted soil, and water-running washing method using the same |
| CN101708501A (en) * | 2009-12-02 | 2010-05-19 | 中国环境科学研究院 | Two-stage countercurrent washing medicament addition stabilization combined restoration method of chromium polluted soil |
| CN102228901A (en) * | 2010-06-11 | 2011-11-02 | 中国地质大学（北京） | Treatment method of chromium-polluted soil |
| CN102641888A (en) * | 2012-04-19 | 2012-08-22 | 天津生态城环保有限公司 | In-situ remediation method of heavy metal polluted site |
| CN102652956A (en) * | 2012-04-19 | 2012-09-05 | 中国环境科学研究院 | Chromium pollution soil in-situ leaching treatment method |
| CN102728609A (en) * | 2012-07-12 | 2012-10-17 | 武汉致衡环境安全工程技术有限公司 | Contaminated soil organized seepage in situ forced purification method |
| CN203061547U (en) * | 2013-01-25 | 2013-07-17 | 北京中地泓科环境科技有限公司 | Comprehensive repair system for groundwater chromium pollution fields |
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2014
- 2014-03-07 CN CN201410082001.5A patent/CN103785680B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007038175A (en) * | 2005-08-05 | 2007-02-15 | Ohbayashi Corp | Water-running washing structure for polluted soil, and water-running washing method using the same |
| CN101708501A (en) * | 2009-12-02 | 2010-05-19 | 中国环境科学研究院 | Two-stage countercurrent washing medicament addition stabilization combined restoration method of chromium polluted soil |
| CN102228901A (en) * | 2010-06-11 | 2011-11-02 | 中国地质大学（北京） | Treatment method of chromium-polluted soil |
| CN102641888A (en) * | 2012-04-19 | 2012-08-22 | 天津生态城环保有限公司 | In-situ remediation method of heavy metal polluted site |
| CN102652956A (en) * | 2012-04-19 | 2012-09-05 | 中国环境科学研究院 | Chromium pollution soil in-situ leaching treatment method |
| CN102728609A (en) * | 2012-07-12 | 2012-10-17 | 武汉致衡环境安全工程技术有限公司 | Contaminated soil organized seepage in situ forced purification method |
| CN203061547U (en) * | 2013-01-25 | 2013-07-17 | 北京中地泓科环境科技有限公司 | Comprehensive repair system for groundwater chromium pollution fields |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159698A (en) * | 2017-06-09 | 2017-09-15 | 航天凯天环保科技股份有限公司 | A kind of method that three-dimensional well elution joint stabilizes in-situ remediation soil polluted by heavy metals |
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| CN103785680B (en) | 2017-01-18 |
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Inventor after: Han Qingjie Inventor after: Guo Bei Inventor after: Wang Tingtao Inventor after: Chen Feng Inventor after: Jia Shijie Inventor before: Han Qingjie Inventor before: Chen Youzhi Inventor before: Sun Xuhui Inventor before: Lin Yunqing Inventor before: Wang Tingtao |
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Effective date of registration: 20170626 Address after: 266000 Shandong province Qingdao city Yanan Road No. 39 Patentee after: QINGDAO XINTIANDI ENVIRONMENTAL PROTECTION CO., LTD. Address before: Yanan City, Shandong province Qingdao City Road 266000 No. 39 Patentee before: Han Qingjie |