CN206981414U - A kind of biological heap soil elution circuit of rehabilitating soil pollution - Google Patents
A kind of biological heap soil elution circuit of rehabilitating soil pollution Download PDFInfo
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- CN206981414U CN206981414U CN201720040500.7U CN201720040500U CN206981414U CN 206981414 U CN206981414 U CN 206981414U CN 201720040500 U CN201720040500 U CN 201720040500U CN 206981414 U CN206981414 U CN 206981414U
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Abstract
It the utility model is related to a kind of biological heap soil elution circuit of rehabilitating soil pollution, including the addition of biological shut-down system, nutrient water and elution circuit, supply air system and liquid gas Collecting and dealing system；Soil heap body basal layer is made up of at least one basic layer unit；Add the top that pipe network is equably layed in soil heap body, nutrient solution and eluent addition tank are alternately to adding pipe network conveying nutrient solution, water and eluent；Leachate collection groove is layed in the centre of basic layer unit, and basic layer unit is tilted by four circumferential leachate collection grooves, and percolate and gas extracting floral tube are built in leachate collection groove；Ajutage is plugged in inside soil heap body, is engaged with percolate and gas extraction pipe and is formed the flow circuit of gas in biological heap body.The utility model simplifies system, can effectively repair different soils combination of contaminants, and keep soil is original to use function by the reasonable combination of biological heap and Soil leaching.
Description
Technical field
It the utility model is related to contaminated soil remediation technical field, and in particular to a kind of biological heap of rehabilitating soil pollution-
Soil leaching system, the reparation of heavy metal and Petroleum concentration soil that the system is mainly used in environmental protection industry and changes
It is kind.
Background technology
The pollutant kind that soil pollution is related to is various, mainly all kinds of organic pollutions and heavy metal contaminants, such as agriculture
Medicine, petroleum hydrocarbon, Polychlorinated biphenyls, mercury, lead, arsenic etc..It is excessive when being contained hazardous substance in soil, more than the self-purification capacity of soil, just
Composition of the soil, 26S Proteasome Structure and Function can be caused to change, microbial activities is suppressed, and harmful substance or its catabolite exist
Gradually accumulation passes through " soil → plant → human body " in soil, or is absorbed by the body indirectly by " soil → water → human body ", reaches
It is exactly soil pollution to the degree being detrimental to health.
In view of the complexity of soil pollution, its Treatment process is also diversified.Carried out according to whether by pollution source soil
Clear digging post processing is divided into based technique for in-situ remediation and showering technology, is divided into physical chemistry technology, biological skill according to technical principle
Art, heat treatment technics etc..And cannot often be solved for the soil contamination problem of some specific contaminated site, a technology
Its environmental problem, every kind of soil restoring technology have different suitability and limitations.Go out to close according to the Feature Selection of pollutant
Suitable recovery technique, and the recovery technique to screening carries out organic assembling, forms systematic soil pollution recovery scenario.
Heavy metal pollution recovery technique in soil mainly has solidification and stabilization, Soil leaching, at cement kiln collaboration
Put, phytoremediation, barrier landfill etc.；Mainly there are chemical oxidation, thermal desorption, biology to the recovery technique of Hydrocarbon in Soil pollution
Heap etc..
Its principle of Soil leaching is acted on the heavy metal in reagent and solid phase of soil, formed deliquescent heavy metal from
Son or metal complex, then rush pollutant to outside root layer with clear water, recycle the compound shower containing certain ligand
Soil, it is allowed to form more stable complex compound with heavy metal ion；Or with the solution with anion, such as carbonate, phosphate
Soil is rinsed, heavy metal is formed compound precipitation.
Geobiont heap technology is to excavate contaminated soil from contaminated areas, is transported to a place specified
(arranging prevents seepage substrate, ventilation shaft etc.), carry out biodegradable showering technology.This method includes getting dirty
The soil of dye is stacked, and by the means such as ventilation, addition nutriment and trace element and increase humidity, simulates in soil
The petroleum component that is adsorbed with removing in soil of aerobic biodegradation.
Soil leaching is eluted with post or accumulation elution is more practical and economical, is controlled suitable for the soil of the small pollution weight of area
Reason, but also easily cause secondary pollution, cause the leaching loss and precipitation of some nutrients, destroy soil microaggregate structure, together
Shi Rongyi causes underground water pollution.It should not be used in fine particle and soil（Viscous/powder）Soil.And geobiont heap is by artificial strong
Change means promote aerobic biodegradation to remove the petroleum hydrocarbons in soil, can suppress if the heavy metal concentration in soil is too high
The microbial activity of soil, slow down the biodegradation of biological heap.
Utility model content
The shortcomings that for above-mentioned prior art or deficiency, the technical problems to be solved in the utility model are to provide a kind of reparation
Biological heap-Soil leaching system of soil pollution, the system architecture is simple, cost is relatively low, repair time is short, can effectively repair not
With the effect of soil pollutant combination.
In order to solve the above technical problems, the utility model has following form：
A kind of biological heap-Soil leaching system of rehabilitating soil pollution, it is characterised in that：The system includes biological heap system
System, nutrient water addition and elution circuit, supply air system and liquid gas Collecting and dealing system；The biological shut-down system includes soil
Heap body and the basal layer positioned at soil heap body bottom, the basal layer are made up of at least one basic layer unit；
The nutrient water addition and elution circuit include being sequentially connected the nutrient solution connect and eluent addition tank, add pump
With add pipe network, the top for adding pipe network and being equably layed in soil heap body；Nutrient solution and eluent the addition tank is handed over
Alternately to adding pipe network conveying nutrient solution, water and eluent；The liquid gas Collecting and dealing system includes leachate collection groove, oozed
The tube wall of filtrate and gas extracting floral tube and percolate and gas extraction pipe, percolate and gas extracting floral tube, which is provided with, to be cut
Seam；The leachate collection groove is layed in the centre of basic layer unit, and the basic layer unit is received by four circumferential percolates
Collect groove to tilt；
Percolate and gas the extracting floral tube is built in leachate collection groove, and passes through percolate and gas extraction pipe
It is connected with liquid-gas disposal device；The supply air system includes being sequentially connected the air blower connect, blast main, air-supply connecting branch
And ajutage, exhaust vent is offered on the tube wall of ajutage；The ajutage is plugged in inside soil heap body, with percolate and gas
Body extraction pipe is engaged and forms the flow circuit of gas in biological heap body.
The basic layer unit is 3% to 10% by the four circumferential inclined gradients of leachate collection groove.
The basic layer unit is divided into two layers up and down, and upper strata is gravel guide layer, and lower floor is concrete anti-seepage layer.
The top of the gravel guide layer is covered with high intensity water penetration geotextiles.
The liquid-gas disposal device includes liquid-gas separator, air exhauster, absorbent charcoal adsorption tank, centrifugal pump and percolate storage
Tank；
The entrance of the liquid-gas separator is connected with percolate and gas extraction pipe, and gaseous phase outlet is connected by air exhauster
Absorbent charcoal adsorption tank is connected to, liquid-phase outlet is connected to diafiltration liquid storage tank by centrifugal pump.
The top of the soil heap body is provided with least one SOIL GAS measurement mouth, and the SOIL GAS measurement mouth is with being inserted in soil
SOIL GAS probe inside earth heap body is connected.
The soil heap body is in prism-frustum-shaped structure, and the angle of inclination at its four sides is 35 ° to 45 °.
The top of the soil heap body is covered with waterproof cloth.
The bottom of the leachate collection groove is provided with concrete anti-seepage layer.
The pipe network that adds is the drip irrigation pipeline with return line.
Compared with prior art, the utility model has the following advantages that：
（1）Two kinds of technologies of biological heap and Soil leaching are optimized and combined, effective remediating heavy metal and stone can be reached
The effect of oils combined pollutant, shorten repair time, simplify system, saved cost.
（2）Nutrient solution, water and eluent are alternately added to soil heap body by nutrient water addition and elution circuit, one
Aspect, the eluent elution of addition heavy metal elute to soil heap body, and extract floral tube by elution by the percolate of bottom
Liquid is collected and individually handled, and has both reached the purpose for removing heavy metal in soil pollutant, while also reduces heavy metal concentration to promoting
Enter the effect of the microbial activity of soil；On the other hand, added by the alternating of nutritional agents-water-eluent and supported to carry out soil
The addition divided, provides nutrient and moisture for Soil Microorganism, maintains the fertility of soil, supplemented with the nutrition in lessivation
The loss of element, by contaminated soil remediation it is up to standard after innoxious use, recover that soil is original uses function.
（3）Leachate collection using modular biological heap basis layer unit and basic layer unit by four circumferential centers
The inclined design of groove, it can effectively collect percolate and with gas while extracting out, it is cost-effective；It can also make heap body unit simultaneously
Operation, the convenient volume for expanding soil heap body, saves space.
（4）Gas follows in percolate and gas extraction pipe the composition soil heap of ajutage and bottom in soil heap body
Loop system, effectively maintain Uniform Ventilation in soil heap body.
Brief description of the drawings
Fig. 1：The overlooking the structure diagram of the utility model biology heap-Soil leaching system.
Fig. 2：The side structure schematic view of the utility model biology heap-Soil leaching system.
In figure, 1, nutrient solution and eluent addition tank；2nd, pump is added；3rd, pipe network is added；4th, soil heap body；5th, it is percolated
Liquid collecting tank；6th, percolate and gas extracting floral tube；7th, ajutage；8th, air-supply connecting branch；9th, valve；10th, press
Power table；11st, air blower；12nd, percolate and gas extraction pipe；13rd, knockout drum；14th, air exhauster；15th, it is living
Property charcoal adsorption tanks；16th, centrifugal pump；17th, it is percolated liquid storage tank；18th, blast main；19th, SOIL GAS measurement mouth；20th, it is native
Soil gas sensor；21st, gravel guide layer；22nd, concrete anti-seepage layer.
Embodiment
Design, concrete structure and caused technique effect of the present utility model are made furtherly below with reference to accompanying drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
The utility model is dystopy soil remediation, after by polluted soil dig clearly, after certain pretreatment
Handled into the system in the utility model.Pretreatment is predominantly handled by disintegrating machine and screening machine, by bulk soil
It is crushed to after particle diameter is less than the screening of the impurity such as 2.5cm, stone, rubbish and individually handles.Contaminated soil addition wood after screening
Bits and stalk increase the porosity of soil as loosening of soil agent.
As shown in Fig. 1 and Fig. 2, a kind of biological heap-Soil leaching system of rehabilitating soil pollution, including biological heap system
System, nutrient water addition and elution circuit, supply air system and liquid gas Collecting and dealing system.
The biological shut-down system includes soil heap body 4 and basal layer；Base-layer bits are in the bottom of soil heap body 4, by extremely
Few one is formed in the basic layer unit being arranged side by side；Basal layer uses modular operation, can be selected according to the needs of actual conditions
The basic layer unit for selecting suitable number is combined to expand the volume of biological heap body 4, saves space and cost.This implementation
In example, the size of biological shut-down system is 10m × 15m, and basal layer is made up of three basic layer units, the chi of each basic layer unit
Very little is 10m × 5m.
Soil heap body 4 is in prism-frustum-shaped structure, and its bottom size is 10m × 15m, is highly 1.5m, the inclination angle at four sides
Spend for 35 ° to 45 °；The inside of soil heap body 4, which is inserted with 20 and Duo Gen of multiple SOIL GASs probes, will hereafter make furtherly
The ajutage 7 of bright supply air system, top are provided with multiple SOIL GASs measurement mouth 19, and SOIL GAS measurement mouth 19 is visited with SOIL GAS
First 20 are connected, for monitoring the oxygen concentration in the soil of diverse location and depth.
The basic layer unit is divided into two layers up and down, and upper strata is thickness 0.2m gravel guide layer 21, and lower floor is thickness
0.3m concrete anti-seepage layer 22；The centre of each basic layer unit is equipped with the liquid that will hereafter describe in detail a gas
The leachate collection groove 5 of Collecting and dealing system, basic layer unit are tilted by its four circumferential leachate collection groove 5, inclined slope
Spend for 3% to 10%.With existing biological heap basal layer to a direction compared with inclined design, each basic layer unit is used by four
All centroclinal structures, both it is easy to collect soil solution, also overcomes existing biological heap basal layer and incline to a direction
The tiltedly problem of limitation soil heap body entirety size.
The nutrient water addition and elution circuit, including be sequentially connected the nutrient solution connect and eluent addition tank 1, add
Pump 2 and add pipe network 3；It is the drip irrigation pipeline with return line to add pipe network 3, is equably layed in the upper of soil heap body 4
Side, for adding nutrient solution, water and eluent to soil heap body 4, return line reclaims excessive nutrient solution, water and eluent,
Drip irrigation pipeline with return line can ensure the uniformity of nutrient solution and eluent addition；Nutrient solution and eluent addition tank
1 alternately conveys nutrient solution, water and eluent to dispensing pipe network 3.Add with the nutrient water in existing biological heap treatment technology
Adding system is compared, nutrient water addition of the present utility model and elution circuit, on the one hand, for adding heavy metal eluent to soil
Earth heap body 4 is eluted, and by the percolate and gas extraction pipe of bottom, leacheate is collected and individually handled, was both reached
The purpose for removing heavy metal in soil pollutant has been arrived, the micro- life for promoting soil is also also acted as while heavy metal concentration is reduced
The effect of thing activity；On the other hand, added by the alternating of nutritional agents-water-eluent to carry out the addition of soil nutrient, for soil
Microorganism provides nutrient and moisture in earth, maintains the fertility of soil, the loss supplemented with the nutrient in lessivation.
In the present embodiment, nutrient solution mainly includes urea, calcium superphosphate, phosphoric acid monoamine and potassium chloride, is supported according in soil
Divide content timely and appropriate discovery addition nutriment, ensure that carbon in soil, nitrogen, phosphorus, potassium ratio maintain 100：10：1：1 or so, contain
Water rate maintains aerobic microbiological activity with degraded oil pollutant 20% to 30%.Eluent uses 0.5% rhamnolipid
As biosurfactant, soil is eluted come the heavy metal in Adsorption soil by pipeline；Certainly, eluent
Also other surfaces activating agent or organic sequestering agent can be used.
The liquid gas Collecting and dealing system, including leachate collection groove 5, percolate and gas extracting floral tube 6, percolate
And gas extraction pipe 12 and liquid-gas disposal device；The liquid-gas disposal device includes liquid gas knockout drum 13, air exhauster 14, lived
Property charcoal adsorption tanks 15, centrifugal pump 16 and diafiltration liquid storage tank 17.
Leachate collection groove 5 is layed in the centre of basic layer unit, its length, width and height size be 6m × 0.5m ×
0.5m；The bottom of leachate collection groove 5 is provided with thickness 0.2m concrete anti-seepage layer, is built-in with a percolate and gas carries
Floral tube 6；The caliber of percolate and gas jacquard weave pipe 6 is 4 inches, and tube wall is provided with the slot that width is 2mm, can make liquid
Enter with gas in pipe；Gravel is filled between percolate and gas jacquard weave pipe 6 and leachate collection groove 5, prevents soil
Grain blocks the slot of percolate and gas extracting floral tube 6.The percolate of soil is made in the gravity of the bottom slope of soil heap body 4
Under, it is pooled to by gravel guide layer 21 in the leachate collection groove 5 of middle part, on the one hand passes through percolate and gas
Floral tube 6 is extracted by percolate and soil vapor extraction；On the other hand, the percolate and gas in the bottom of soil heap body 4 extract flower
The pumping of pipe 6 is supplied gas with the ajutage 7 of supply air system to be engaged and forms circulation, flows gas in soil heap body 4.
The entrance of liquid gas knockout drum 13 and percolate and gas extraction pipe（12）It is connected, gaseous phase outlet passes through exhausting
Machine 14 is connected to absorbent charcoal adsorption tank 15, and liquid-phase outlet is connected to diafiltration liquid storage tank 17 by centrifugal pump 16.Percolate passes through liquid
The bottom of tank body is remained in after gas knockout drum 13, diafiltration liquid storage tank 17 is evacuated to by its liquid-phase outlet, pipeline, centrifugal pump 16
It is interior, and be transported to Sewage Disposal and carry out sewage heavy metal processing；Gas is extracted out by air exhauster 14 from gaseous phase outlet, through work
After property charcoal adsorption tanks 15 adsorb volatile organic matter therein, air is emitted into.
The supply air system, including it is sequentially connected the air blower 11 connect, blast main 18, air-supply connecting branch 8 and air-supply
Pipe 7；Ajutage 7 is the PVC pipes that exhaust vent is offered on tube wall, and pipe range 1.5m, caliber is 2 inches；Ajutage 7 plugs
In the inside of soil heap body 4, it is engaged with percolate and gas extraction pipe 12 and forms the flowing of gas in biological heap 4
Circulation.The inside of soil heap body 4 is injected fresh air into by air blower 11, maintains the oxygen content in soil heap body 4
More than 7%；Supply air system operation in every 2 hours is once.In specific embodiment, air-supply connecting branch 8 is in and blast main 18
Junction, valve 9 and pressure gauge 10 are additionally provided with, for controlling the air quantity of air-supply.
In specific embodiment, the top of soil heap body 4 prevents airborne dust, moisture evaporation and rainwater from entering covered with waterproof cloth
Heap body, reducing extraneous meteorological reason influences the generation of heap body percolate and soil water content fluctuation；The top covering of guide layer 21
There are high intensity water penetration geotextiles, to prevent Soil fine particles from blocking the space of guide layer 21.
It is about 3 to 6 months that the system, which handles heavy metal and petroleum hydrocarbons cycle,.
According to the teaching of the present embodiment, other the utility model protection models can be achieved in those skilled in the art completely
Enclose interior technical scheme.
Claims (10)
- A kind of 1. biological heap-Soil leaching system of rehabilitating soil pollution, it is characterised in that：The system include biological shut-down system, Nutrient water adds and elution circuit, supply air system and liquid gas Collecting and dealing system；The biological shut-down system includes soil heap body（4）With positioned at soil heap body（4）The basal layer of bottom, the basal layer is by extremely A few basic layer unit is formed；The nutrient water addition and elution circuit include being sequentially connected the nutrient solution connect and eluent addition tank（1）, add pump （2）With add pipe network（3）, it is described to add pipe network（3）Equably it is layed in soil heap body（4）Top；The nutrient solution and leaching Lotion adds tank（1）Alternately to adding pipe network（3）Convey nutrient solution, water and eluent；The liquid gas Collecting and dealing system includes leachate collection groove（5）, percolate and gas extracting floral tube（6）And percolate And gas extraction pipe（12）, percolate and gas extract floral tube（6）Tube wall be provided with slot；The leachate collection groove （5）The centre of basic layer unit is layed in, the basic layer unit is by four circumferential leachate collection grooves（5）Tilt；It is described Percolate and gas extracting floral tube（6）It is built in leachate collection groove（5）, and pass through percolate and gas extraction pipe（12）With Liquid-gas disposal device is connected；The supply air system includes being sequentially connected the air blower connect（11）, blast main（18）, air-supply connecting branch（8）And air-supply Pipe（7）, ajutage（7）Tube wall on offer exhaust vent；The ajutage（7）It is plugged in soil heap body（4）Inside, with diafiltration Liquid and gas extraction pipe（12）It is engaged and forms biological heap body（4）The flow circuit of interior gas.
- 2. system according to claim 1, it is characterised in that：The basic layer unit is by four circumferential leachate collection grooves （5）The inclined gradient is 3% to 10%.
- 3. system according to claim 1 or 2, it is characterised in that：The basic layer unit is divided into two layers up and down, and upper strata is Gravel guide layer（21）, lower floor is concrete anti-seepage layer（22）.
- 4. system according to claim 3, it is characterised in that：The gravel guide layer（21）Top covered with high intensity Water penetration geotextiles.
- 5. system according to claim 1, it is characterised in that：The liquid-gas disposal device includes liquid-gas separator（13）、 Air exhauster（14）, absorbent charcoal adsorption tank（15）, centrifugal pump（16）With diafiltration liquid storage tank（17）；The liquid-gas separator（13）Enter Mouth and percolate and gas extraction pipe（12）It is connected, gaseous phase outlet passes through air exhauster（14）It is connected to absorbent charcoal adsorption tank （15）, liquid-phase outlet passes through centrifugal pump（16）It is connected to diafiltration liquid storage tank（17）.
- 6. system according to claim 1, it is characterised in that：The soil heap body（4）Top be provided with least one soil Soil vapor survey mouth（19）, the SOIL GAS measurement mouth（19）With being inserted in soil heap body（4）Internal SOIL GAS probe（20）Phase Connection.
- 7. system according to claim 1, it is characterised in that：The soil heap body（4）In prism-frustum-shaped structure, its four sides Angle of inclination is 35 ° to 45 °.
- 8. system according to claim 1, it is characterised in that：The soil heap body（4）Top covered with waterproof cloth.
- 9. system according to claim 1, it is characterised in that：The leachate collection groove（5）Bottom be provided with concrete Impervious barrier.
- 10. system according to claim 1, it is characterised in that：It is described to add pipe network（3）For the drip irrigation with return line Pipeline.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694534A (en) * | 2017-01-13 | 2017-05-24 | 上格环境科技（上海）有限公司 | Organic bank-soil leaching system for repairing heavy metal and petroleum soil contamination |
| CN108273842A (en) * | 2018-05-02 | 2018-07-13 | 北京高能时代环境技术股份有限公司 | A kind of soil remediation thermal desorption heating device |
| CN108480385A (en) * | 2018-03-06 | 2018-09-04 | 中国科学院沈阳应用生态研究所 | A kind of strengthening repair method and device for biological heap |
| CN108568449A (en) * | 2018-03-22 | 2018-09-25 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of contaminated soil in-situ repairing device |
| CN109848196A (en) * | 2019-02-02 | 2019-06-07 | 上海泽复环境工程有限公司 | A kind of harmless treatment process of oil-polluted soils |
| CN111570467A (en) * | 2020-04-30 | 2020-08-25 | 南京大学 | Ectopic aerobic reinforced stabilization system and method for stored household garbage |
| CN111940497A (en) * | 2020-07-30 | 2020-11-17 | 中冶华天南京工程技术有限公司 | Method and system for ectopic ecological remediation of polluted soil |
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2017
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106694534A (en) * | 2017-01-13 | 2017-05-24 | 上格环境科技（上海）有限公司 | Organic bank-soil leaching system for repairing heavy metal and petroleum soil contamination |
| CN108480385A (en) * | 2018-03-06 | 2018-09-04 | 中国科学院沈阳应用生态研究所 | A kind of strengthening repair method and device for biological heap |
| CN108568449A (en) * | 2018-03-22 | 2018-09-25 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of contaminated soil in-situ repairing device |
| CN108273842A (en) * | 2018-05-02 | 2018-07-13 | 北京高能时代环境技术股份有限公司 | A kind of soil remediation thermal desorption heating device |
| CN109848196A (en) * | 2019-02-02 | 2019-06-07 | 上海泽复环境工程有限公司 | A kind of harmless treatment process of oil-polluted soils |
| CN111570467A (en) * | 2020-04-30 | 2020-08-25 | 南京大学 | Ectopic aerobic reinforced stabilization system and method for stored household garbage |
| CN111570467B (en) * | 2020-04-30 | 2021-11-16 | 南京大学 | Ectopic aerobic reinforced stabilization system and method for stored household garbage |
| CN111940497A (en) * | 2020-07-30 | 2020-11-17 | 中冶华天南京工程技术有限公司 | Method and system for ectopic ecological remediation of polluted soil |
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