CN106345801A - Dump leaching restoration system and restoration process of chromium pollution soil - Google Patents
Dump leaching restoration system and restoration process of chromium pollution soil Download PDFInfo
- Publication number
- CN106345801A CN106345801A CN201611015849.1A CN201611015849A CN106345801A CN 106345801 A CN106345801 A CN 106345801A CN 201611015849 A CN201611015849 A CN 201611015849A CN 106345801 A CN106345801 A CN 106345801A
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- heap
- chromium
- polluted soil
- dump leaching
- soaking pit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a dump leaching restoration system of chromium pollution soil. The dump leaching restoration system comprises a dump leaching pool, a chromium pollution soil pile body, a spraying pipeline and a covering layer, wherein the dump leaching pool is formed by building a brick built substrate layer and a cement concrete surface layer covering the brick built substrate layer; the dump leaching pool comprises a dump leaching pool body and an anchoring groove; the anchoring groove is in an annular shape, and surrounds the outer side of the dump leaching pool body; an impermeable membrane and geotechnical cloth are sequentially paved on the cement concrete surface layer of the dump leaching pool body; the edges of the impermeable membrane and the geotechnical cloth extend out of the dump leaching pool body and are fixed in the anchoring groove; the chromium pollution soil pile is piled in the dump leaching pool body; the spraying pipeline is used for supplying restoration medicaments and moisture, and is paved on the upper surface of the chromium pollution soil pile body; the covering layer covers the spraying pipeline; the edges of the covering layer the edges of the covering layer extend out of the dump leaching pool body and are fixed in the anchoring groove.
Description
Technical field
The present invention relates to soil remediation field, specifically a kind of dystopy dump leaching reparation being applicable to chromium-polluted soil
System and technique.
Background technology
Heavy metal chromium, as a kind of industrial raw materials, in its long-term production and application, can cause one to soil environment
Fixed impact.Chromium in soil main with trivalent chromium (cr(iii)) and Cr VI (cr(vi)) two kinds of valence state presence.Wherein, cr
(iii) it is trace element needed by human, only just shows bio-toxicity at higher concentrations, be in the range of 6 ~ 11 in ph
Cr(iii) stable hydroxide can be formed, and be wrapped on soil granular in the form of precipitating, transfer ability in soil
Very weak；And cr(vi) there are stronger carcinogenesis, the dissolubility in water is very high, and transfer ability is strong, and soil granular is inhaled to it
Attached ability, easily with water leaching polluted underground water system.
At present, adopt showering hexavalent chromium polluted soil remediation more.In the past in repair process, big multiple-project is to pollute
Soil digs clearly to be transported in specific structures and is processed.Structures are generally xoncrete structure, need to take larger field
Ground space.Dispose place the infrastructure construction cycle is longer, high cost, middle-size and small-size project is not suitable for using such disposal
Mode.After the completion of contaminated soil is processed, structures need to remove, and waste time and energy and high cost.In addition, the process that strange land is disposed
In, the dust containing pollution of chromium easily spills in air, causes air pollution.Therefore, for solving the above problems and preventing two
Secondary pollution, chromium-polluted soil repair process needs a kind of special dystopy disposal technology.
Content of the invention
It is an object of the invention to provide a kind of dump leaching repair system of chromium-polluted soil reparation and technique, to solve existing soil
Concrete structures used by earth repair system need that occupied ground space is big, infrastructure construction cycle length, high cost, unfavorable
After the completion of middle-size and small-size project uses, repairs, the dismounting of structures need to be wasted time and energy and the technical problem such as cost height, and in soil
The dust containing chromium pollutant in earth processing procedure directly spills in air, causes the problem that air quality declines.This disposal system
, simply it is easy to implement, operating cost is low for system structure.
The dump leaching repair system of the chromium-polluted soil that the present invention provides, comprising:
Heap soaking pit, by brick basal layer and the concrete surface layer that is overlying on brick basal layer is built-up for it；This heap soaking pit bag
Include: heap soaking pit body and anchoring groove；Anchoring groove is annular, around the outside of heap soaking pit body；Wherein, heap soaking pit body is mixed
It is equipped with antiseepage film and geotextiles successively on solidifying soil concrete surface layer, and the edge of described antiseepage film and geotextiles stretches out heap soaking pit body
And be fixed in anchoring groove；
Chromium-polluted soil heap body, its heap is in heap soaking pit body；
Repair the spray piping of medicament and moisture for supply, it is layed in the upper surface of chromium-polluted soil heap body；
Cover layer, it is covered in above spray piping, and edge stretches out heap soaking pit body and is fixed in anchoring groove.
Preferably, the thickness of concrete surface layer is 5 ~ 15cm.
Preferably, described antiseepage film is density polyethylene film with high.
Preferably, described geotextiles are 600g/m2Non-woven geotextile.
Preferably, a height of 1 ~ 5m of heap of described chromium-polluted soil heap body, the side slope of chromium-polluted soil heap body is than for 1:1 ~ 1:
3.
Preferably, described spray piping outer surface lays shower nozzle, and 2 ~ 4 shower nozzles are laid in each section altogether, and sprinkler spacing is pressed
Equal angular is configured.
The present invention also provides a kind of dump leaching renovation technique of chromium-polluted soil, comprises the steps:
1) setting of heap soaking pit: heap soaking pit is built with the concrete surface layer being overlying on brick basal layer with brick basal layer；Should
Heap soaking pit includes: heap soaking pit body and anchoring groove；Anchoring groove is annular, around the outside of heap soaking pit body；Wherein, heap soaking pit
Antiseepage film and geotextiles are equipped with successively on the concrete surface layer of body, and the edge of described antiseepage film and geotextiles stretches out heap
Soaking pit body is simultaneously fixed in anchoring groove；
2) chromium-polluted soil is processed: chromium-polluted soil sieving approach, reaches 2 ~ 5cm to particle diameter；
3) setting of soil heap body: by step 2) process after chromium-polluted soil heap in heap soaking pit body, formed pollution of chromium
Soil heap body；
4) spray piping setting: lay spray piping in chromium-polluted soil heap body upper surface, and by spray piping to pollution of chromium
Medicament and moisture are repaired in the supply of soil heap body, carry out repairing reaction；
5) maintenance: lay cover layer, cover layer above the spray piping above step 4) reacted chromium-polluted soil heap body
Edge extend and imbed in anchoring groove fixing, complete cover chromium-polluted soil heap body, maintenance 3 ~ 5 days；
6) detect: the soil after maintenance is detected, qualified, fills, unqualified then again add chromium-polluted soil heap body in locate
Reason.
Preferably, the thickness of concrete surface layer is 5 ~ 15cm.
Preferably, described antiseepage film is density polyethylene film with high, GCL or composite geo-membrane；Described cover layer
For tarpaulin or macromolecule membrane；Described geotextiles are 600g/m2Non-woven geotextile.
Preferably, a height of 1 ~ 5m of heap of described chromium-polluted soil heap body, the Slope of chromium-polluted soil heap body than for 1:1 ~
1:3.
Compared with prior art, the present invention's it is a technical advantage that:
1st, effectively prevent airborne dust, it is to avoid secondary pollution, safely, buy clearly, environmental benefit is obvious.
2nd, system structure is simple, easy construction, effectively reduction rehabilitation cost: the density polyethylene film with high of present invention use,
Geotextiles, tarpaulin etc. are all common materials in civil engineering, wide material sources, cheap, can buy nearby, effectively shorten and apply
The work cycle；Heap soaking pit builds speed soon, does not affect construction speed, and single heap soaking pit treating capacity is big and can reuse, pollution
After soil is mixed with medicament, bank up it is not necessary to energy consumption in heap soaking pit, after the completion of soil remediation, salvage material, fill and lead up and be compacted
Soil, reduces rehabilitation cost.
3rd, applied widely, applicability is strong: safety and stability, dump leaching reaction tank flexible structure, can be according to place size
Adjust length size with treatment scale, the scope of application is wider, the treating capacity of dump leaching reaction tank is big, have extensively to repairing medicament
Adaptability, rehabilitation cost is low, short construction period, and engineering applicability is strong.
To sum up, the present invention repairs industry relevant criterion according to national contaminated site, devises a kind of chromium-polluted soil dystopy
Dump leaching disposal system, not only performs contaminated soil mixing, moisturizing, the overall process of reaction, and structure is simple, easy construction,
Short construction period, low cost, can reuse, there is preferable application prospect.
Brief description
Fig. 1 is the flow chart of the dump leaching renovation technique of chromium-polluted soil reparation of the present invention；
Fig. 2 is the structural representation of the dump leaching repair system of chromium-polluted soil reparation of the present invention；
Fig. 3 is that the top view display spray piping of the dump leaching repair system of chromium-polluted soil reparation of the present invention lays situation；
Fig. 4 is the shower nozzle setting schematic diagram of the dump leaching repair system of chromium-polluted soil reparation of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings present invention is made further explanation and description.
In conjunction with Fig. 2 and Fig. 3, the dump leaching repair system of the chromium-polluted soil of the present invention, comprising:
Heap soaking pit, by brick basal layer 6 and to be overlying on concrete surface layer 5(thickness on brick basal layer 6 be 5 ~ 15cm for it) structure
Build and form；This heap soaking pit includes: heap soaking pit body 10 and anchoring groove 8；Anchoring groove 8 is annular, around heap soaking pit body 10
Outside；Wherein, the concrete surface layer 5 of heap soaking pit body 10 is equipped with antiseepage film 4 and geotextiles 3 successively, and antiseepage film 4
(density polyethylene film with high of thickness 15cm, GCL or composite geo-membrane) and geotextiles 3(600g/m2Non-woven
Geotextiles) edge stretch out heap soaking pit body 10 and be fixed in anchoring groove 8；
Chromium-polluted soil heap body 2, its heap in heap soaking pit body 10, typically, a height of 1 ~ 5m of heap of chromium-polluted soil heap body, chromium
The side slope of contaminated soil heap body is than for 1:1 ~ 1:3；
Repair the spray piping 7 of medicament and moisture for supply, it is layed in the upper surface of chromium-polluted soil heap body 2, shower
Road 7 can be multiple, arranged in parallel.In conjunction with shown in Fig. 3 and 4, spray piping 7 outer surface lays shower nozzle 70, and each section lays 2 altogether
~ 4 shower nozzles, sprinkler spacing is configured that (Fig. 4 lays 3 shower nozzles altogether for each section, and each sprinkler spacing is in the same angle
120 degree).
Cover layer 1, it is covered in above spray piping, and edge stretches out heap soaking pit body and is fixed in anchoring groove
In conjunction with Fig. 1 and Fig. 2, the dump leaching of above-mentioned chromium-polluted soil reparation is disposed and is comprised the steps:
Step one, preparation of construction: for ensureing being sufficiently mixed of contaminated soil and reducing agent, carry out carrying out dump leaching before processing needs
Sieving approach.Sieving approach is carried out to waste material of buildings using sieving approach bucket.Degree of crushing typically exists according to actual requirement, particle diameter
2 ~ 5cm, when sieving approach, Quality Inspector should periodically patrol, it is to avoid machinery is constructed in spite of illness, causes Sieving and casing unqualified, impact
Repairing effect.
Step 2, the design of heap soaking pit: always just measured according to contaminated soil reality, the size of design heap body.According to contaminated soil
Actual earth volume, design reaction tank bottom length, bottom width, top length, top width size, and calculate heap body heap height, and the high general 1 ~ 5m of heap, heap body
Between Slope is than 1:1 ~ 1:3；
v=1/3×h×(s1+s2+√s1×s2) (1)
In formula: v represents the volume of soil heap body, the heap that h represents soil heap body is high, and s1 represents the bottom surface area of soil heap body,
S2 represents the upper bottom surface area of soil heap body.
Step 3, heap soaking pit are built by laying bricks or stones: the length size according to the heap soaking pit of design builds cell body, smooth location, adopts
With the cell body of brick basal layer, and the thick concrete surface layer 8 of laying 10cm outside brick cell body.This heap soaking pit includes:
Heap soaking pit body 10 and anchoring groove 8；Anchoring groove 8 is annular, around the outside setting of heap soaking pit body 10
Step 4, setting impervious barrier: antiseepage film 4 is layed in above concrete surface layer, is hdpe film, thickness 0.5 ~ 3.0mm, prevents
Ooze coefficient and be less than 1.0 × 10-7cm/s；Geotextiles 3 are laid on hdpe film, quality selects 600 ~ 800g/cm2, hdpe film and geotechnique
Cloth 3 should be laid smooth, in addition to covering basal layer, outwards should be extended 0.3 ~ 0.5m by foundation ditch border.Also dependent on design parameter system
Make the composite geo-membrane of respective material, thickness.
Step 5, heap body are banked up: by the chromium-polluted soil heap after processing in heap soaking pit body 10, form pollution of chromium soil
Earth heap body 2.Conventional heap machinery of building has excavator, bull-dozer (crawler type) and dumper etc..Build heap machinery from 20t heavy type vapour
Car, builds stack height 1 ~ 5m, and heap body is trapezoidal heap body, and length, width and height determine all in accordance with scene pollution earth volume.
Step 6, spray wash heap: heap body is banked up after end, in stockyard surface layout spray piping 7.Pipe laying spacing root
According to the design of true reactor body size, generally 0.2 ~ 1.0m, concrete laying sees Fig. 3.For increasing flow velocity, the reduction of erection time, in shower
Certain angle is pressed on the same cross-sectional in road 7 and lays shower nozzle 70, between each shower nozzle of each section 3 shower nozzle 70(of laying, angle is
120 degree), see Fig. 4.Repair medicament (such as: ferrous salt, zeroth order iron powder etc.) to the supply of chromium-polluted soil heap body by spray piping 7
And moisture, carry out repairing reaction.
Above the spray piping 7 spraying above reacted chromium-polluted soil heap body, laying cover layer 1 is with windproof and rain proof
Prevent water loss, the edge of cover layer 1 extends and imbeds fixing in anchoring groove 8, complete covering chromium-polluted soil heap body 2 is supported
Shield 3 ~ 5 days.
Step 7, heap unloading: after dump leaching is processed, contaminated soil is uniform with reduction medicament to be mixed and react.Processed
Gather pedotheque in journey, grasp repairing effect and progress.Carry out the final place such as filling after detecting qualified soil heap unloading
Put.Unqualified soil then adds process in chromium-polluted soil heap body again.
The dump leaching repair system of chromium-polluted soil of the present invention and renovation technique may be directly applied to hexavalent chromium polluted soil and repair
Multiple, but equally applicable to other heavy metals, metalloid, petroleum hydrocarbon, semi-volatile organic matter etc..
Embodiment described above is only the preferred embodiment lifted for absolutely proving the present invention, the protection model of the present invention
Enclose not limited to this.Equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, all in the present invention
Protection domain within.Protection scope of the present invention is defined by claims.
Claims (10)
1. a kind of dump leaching repair system of chromium-polluted soil is it is characterised in that include:
Heap soaking pit, by brick basal layer and the concrete surface layer that is overlying on brick basal layer is built-up for it；This heap soaking pit bag
Include: heap soaking pit body and anchoring groove；Anchoring groove is annular, around the outside of heap soaking pit body；Wherein, heap soaking pit body is mixed
It is equipped with antiseepage film and geotextiles successively on solidifying soil concrete surface layer, and the edge of described antiseepage film and geotextiles stretches out heap soaking pit body
And be fixed in anchoring groove；
Chromium-polluted soil heap body, its heap is in heap soaking pit body；
Repair the spray piping of medicament and moisture for supply, it is layed in the upper surface of chromium-polluted soil heap body；
Cover layer, it is covered in above spray piping, and edge stretches out heap soaking pit body and is fixed in anchoring groove.
2. the dump leaching repair system of chromium-polluted soil according to claim 1 is it is characterised in that the thickness of concrete surface layer
Spend for 5 ~ 15cm.
3. the dump leaching repair system of chromium-polluted soil according to claim 1 is it is characterised in that described antiseepage film is highly dense
Degree polyethylene film.
4. the dump leaching repair system of chromium-polluted soil according to claim 1 is it is characterised in that described geotextiles are
600g/m2Non-woven geotextile.
5. the dump leaching repair system of chromium-polluted soil according to claim 1 is it is characterised in that described chromium-polluted soil heap
A height of 1 ~ the 5m of heap of body, the side slope of chromium-polluted soil heap body is than for 1:1 ~ 1:3.
6. the dump leaching repair system of chromium-polluted soil according to claim 1 is it is characterised in that described spray piping appearance
Shower nozzle is laid in face, and 2 ~ 4 shower nozzles are laid in each section altogether, and sprinkler spacing is configured in the same angle.
7. a kind of dump leaching renovation technique of chromium-polluted soil is it is characterised in that comprise the steps:
1) setting of heap soaking pit: heap soaking pit is built with the concrete surface layer being overlying on brick basal layer with brick basal layer；Should
Heap soaking pit includes: heap soaking pit body and anchoring groove；Anchoring groove is annular, around the outside of heap soaking pit body；Wherein, heap soaking pit
Antiseepage film and geotextiles are equipped with successively on the concrete surface layer of body, and the edge of described antiseepage film and geotextiles stretches out heap
Soaking pit body is simultaneously fixed in anchoring groove；
2) chromium-polluted soil is processed: chromium-polluted soil sieving approach, reaches 2 ~ 5cm to particle diameter；
3) setting of soil heap body: by step 2) process after chromium-polluted soil heap in heap soaking pit body, formed pollution of chromium
Soil heap body；
4) spray piping setting: lay spray piping in chromium-polluted soil heap body upper surface, and by spray piping to pollution of chromium
Medicament and moisture are repaired in the supply of soil heap body, carry out repairing reaction；
5) maintenance: lay cover layer, cover layer above the spray piping above step 4) reacted chromium-polluted soil heap body
Edge extend and imbed in anchoring groove fixing, complete cover chromium-polluted soil heap body, maintenance 3 ~ 5 days；
6) detect: the soil after maintenance is detected, qualified, fills, unqualified then again add chromium-polluted soil heap body in locate
Reason.
8. the dump leaching renovation technique of chromium-polluted soil according to claim 7 is it is characterised in that the thickness of concrete surface layer
Spend for 5 ~ 15cm.
9. the dump leaching renovation technique of chromium-polluted soil according to claim 7 is it is characterised in that described antiseepage film is highly dense
Degree polyethylene film, GCL or composite geo-membrane；Described cover layer is tarpaulin or macromolecule membrane；Described geotextiles are
600g/m2Non-woven geotextile.
10. the dump leaching renovation technique of chromium-polluted soil according to claim 7 is it is characterised in that described chromium-polluted soil
A height of 1 ~ the 5m of heap of heap body, the Slope of chromium-polluted soil heap body is than for 1:1 ~ 1:3.
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| CN201611015849.1A CN106345801A (en) | 2016-11-18 | 2016-11-18 | Dump leaching restoration system and restoration process of chromium pollution soil |
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| CN201611015849.1A CN106345801A (en) | 2016-11-18 | 2016-11-18 | Dump leaching restoration system and restoration process of chromium pollution soil |
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Cited By (8)
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| CN108372196A (en) * | 2018-02-09 | 2018-08-07 | 广州市怡地环保有限公司 | Heavy-metal contaminated soil restorative procedure |
| CN108787726A (en) * | 2018-08-29 | 2018-11-13 | 北京高能时代环境技术股份有限公司 | A kind of technique that chemical leaching and electronation repairing polluted soil is used in combination |
| CN109092870A (en) * | 2018-11-05 | 2018-12-28 | 北京建工环境修复股份有限公司 | A kind of pollution of chromium building waste immersion systems and its embathe method |
| CN109290333A (en) * | 2018-11-16 | 2019-02-01 | 梅州市华智星技术服务有限公司 | A kind of integrated application method of chromium slag landfill disposal |
| CN110052471A (en) * | 2019-04-02 | 2019-07-26 | 中国石油集团川庆钻探工程有限公司 | A kind of oil and gas well drilling waste landfill process |
| CN111282954A (en) * | 2020-02-12 | 2020-06-16 | 四川省生态环境科学研究院 | Sodium sulfide waste residue soil pollution risk management and control system |
| CN111922056A (en) * | 2020-06-12 | 2020-11-13 | 生态环境部南京环境科学研究所 | Chromium contaminated soil's heap leaching repair system |
| CN112718851A (en) * | 2020-12-18 | 2021-04-30 | 中交第二航务工程局有限公司 | Method for co-processing dredged sludge and chromium-contaminated soil |
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| CN108787726A (en) * | 2018-08-29 | 2018-11-13 | 北京高能时代环境技术股份有限公司 | A kind of technique that chemical leaching and electronation repairing polluted soil is used in combination |
| CN109092870A (en) * | 2018-11-05 | 2018-12-28 | 北京建工环境修复股份有限公司 | A kind of pollution of chromium building waste immersion systems and its embathe method |
| CN109092870B (en) * | 2018-11-05 | 2023-10-03 | 北京建工环境修复股份有限公司 | Chromium-polluted building rubbish pickling system and pickling method thereof |
| CN109290333A (en) * | 2018-11-16 | 2019-02-01 | 梅州市华智星技术服务有限公司 | A kind of integrated application method of chromium slag landfill disposal |
| CN110052471A (en) * | 2019-04-02 | 2019-07-26 | 中国石油集团川庆钻探工程有限公司 | A kind of oil and gas well drilling waste landfill process |
| CN110052471B (en) * | 2019-04-02 | 2022-02-25 | 中国石油集团川庆钻探工程有限公司 | Petroleum and natural gas drilling waste landfill process |
| CN111282954A (en) * | 2020-02-12 | 2020-06-16 | 四川省生态环境科学研究院 | Sodium sulfide waste residue soil pollution risk management and control system |
| CN111922056A (en) * | 2020-06-12 | 2020-11-13 | 生态环境部南京环境科学研究所 | Chromium contaminated soil's heap leaching repair system |
| CN111922056B (en) * | 2020-06-12 | 2021-12-21 | 生态环境部南京环境科学研究所 | Chromium contaminated soil's heap leaching repair system |
| CN112718851A (en) * | 2020-12-18 | 2021-04-30 | 中交第二航务工程局有限公司 | Method for co-processing dredged sludge and chromium-contaminated soil |
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Application publication date: 20170125 |