CN207343444U - A kind of heavy-metal contaminated soil elutes repair system - Google Patents
A kind of heavy-metal contaminated soil elutes repair system Download PDFInfo
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- CN207343444U CN207343444U CN201720287143.4U CN201720287143U CN207343444U CN 207343444 U CN207343444 U CN 207343444U CN 201720287143 U CN201720287143 U CN 201720287143U CN 207343444 U CN207343444 U CN 207343444U
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Abstract
A kind of Soil leaching repair system is the utility model is related to, belongs to heavy metal pollution of soil and administers field, and in particular to a kind of heavy-metal contaminated soil elutes repair system.Heavy metal is transferred in leacheate from soil by the utility model by eluent, recycles magnetic medium as sorbing material, each metal ion species in quick adsorption leacheate, making it difficult to which the heavy-metal contaminated soil of reparation is recovered rapidly.Magnetic medium is adsorbed under the action of high-intensity magnetic field in three-dimensional paramagnetic metal link network, and magnetizing mediums is taken out of and recycled by the machine driving of metal link network, is improved the utilization rate of magnetic kind, is reduced rehabilitation cost.
Description
Technical field
A kind of Soil leaching repair system is the utility model is related to, belongs to heavy metal pollution of soil and administers field, specifically relate to
A kind of and heavy-metal contaminated soil elution repair system.
Background technology
Soil pollution is due to that the plant nutrient of material or excess with physiological-toxicity enters soil and causes soil
Earth property deterioration and the phenomenon of physiological function of plants imbalance.With China's rapid development of economy, extensive economic growth mould
Formula causes soil pollution situation severe exacerbation.According to national Soil Pollution Investigation publication in 2014, the state in China 16.1%
Native area is contaminated, and 19.4% arable land is contaminated, and about 1/3rd industrial sites investigated are contaminated.Soil is dirty
Type is contaminated based on heavy metal pollution, and organic pollution takes second place, and compound pollution proportion is smaller.Cause the heavy metal of soil pollution
It is main to include cadmium, mercury, arsenic, copper, lead, chromium, zinc and nickel, investigate publication show these heavy metal point position exceeding standard rates be respectively 7.0%,
1.6%th, 2.7%, 2.1%, 1.5%, 1.1%, 0.9%, 4.8%, due to heavy metal in soil have concealment, cumulative bad,
Hysteresis quality and toxicity are relatively strong and the characteristics of easily by bio-absorbable, therefore very urgent for heavy metal pollution of soil repair.
The reparation of heavy-metal contaminated soil mainly has three kinds of methods.The first is that contaminated soil is carried out at security landfill
Put, this mode floor space is larger.Second is to carry out solidification and stabilization to contaminated soil, changes the heavy metal of activated state
For stable state, its migration in the soil, bioavailability are reduced.This approach can reduce the poison of heavy metal in soil
Evil, but with the change of envirment factor, the stabilized process of heavy metals immobilization is possible to inversely carry out, and causes reparation to be not thorough.
The third is the heavy metal removed in soil.Phytoremediation can realize the removing of heavy metal, and phytoremediation technology grinds in the country
Study carefully also more, but for the soil of some high concentration heavy metal pollutions, the concentration and poison of heavy metal are such as reduced without pre-treatment
Property, phytoremediation is typically infeasible.And elution technique can efficiently, without quadratic risk function, thoroughly remove contaminated soil in
Heavy metal, both can individually repair the heavy-metal contaminated soil of small area, can also be used as pretreatment technology and other restorative procedures
Use in conjunction, has been more and more widely used.
Soil leaching technology is divided into elution in situ according to processing mode difference and dystopy elutes.Elution method in situ is directly will
Eluent injection soil in, leacheate is extracted into soil surface in downstream, then leacheate is handled, so continue into
OK, until soil environment quality reaches relevant criterion.Dystopy elution is to excavate contaminated soil, in input elution equipment, is adopted
The pollutant for removing or shifting in concentration soil is cleaned with leacheate, is finally handled dense after leacheate or decrement containing pollutant
Contracting mud cake.The technology can be used for the persistence such as heavy-metal contaminated soil and polycyclic aromatic hydrocarbon, Polychlorinated biphenyls, organo-chlorine pesticide organic
The repairing and treating of contaminated soil.
It is main scarce there is also 2 although soil washing has the advantages that long-term effect, ease for operation and high osmosis
Point：First, elution method needs to consume substantial amounts of water to prepare leacheate；Second, a large amount of leachates need to handle.It is rich in leachates
The complex compound of heavy metal and eluent, can there are pollution risk to underground water if do not dealt carefully with.
Utility model content
The utility model main purpose is that heavy metal pollution treatment effeciency present in the existing Soil leaching technology of solution is low
Lower and technical problem of high cost, there is provided a kind of heavy-metal contaminated soil elutes repair system.The utility model passes through elution
Heavy metal is transferred in leacheate by agent from soil, magnetic medium is recycled as sorbing material, in quick adsorption leacheate
Each metal ion species, making it difficult to the heavy-metal contaminated soil of reparation is recovered rapidly.Work of the magnetic medium in high-intensity magnetic field
It is adsorbed under in three-dimensional paramagnetic metal link network, magnetizing mediums is taken out of and recycled by the machine driving of metal link network, is improved
The utilization rate of magnetic kind, reduces rehabilitation cost.
The above-mentioned purpose of the utility model is mainly addressed by following technical proposals：
A kind of heavy-metal contaminated soil elutes repair system, including：The soil breaking system that is sequentially connected, soil argillaceous sand stone
Piece-rate system, superconduction magnetic separation system, sludge dewatering system；Wherein, soil breaking system includes：Soil storage feed bin, soil
Crusher and belt feeder are sequentially connected with composition.
Optimization, a kind of above-mentioned heavy-metal contaminated soil elution repair system, soil argillaceous sand stone piece-rate system includes：According to
Pond, hydrocyclone, dewatering screen is mixed in cylinder roto-siofter, the muddy water of secondary connection；The import of cylinder roto-siofter and belt feeder
It is connected, pond, coarse fodder outlet connection roller-type stone washing machine, the roller-type stone washing machine coarse fodder port of export is mixed in connection muddy water in its fines outlet
It is connected with belt feeder, the muddy water collecting tank water outlet that roller-type stone washing machine bottom is set is connected with dewatering screen feed inlet.
Optimization, a kind of above-mentioned heavy-metal contaminated soil elution repair system, superconduction magnetic separation system includes：Import with
The collecting tank that the hydrocyclone light substance port of export, dewatering screen water outlet are connected；Collecting tank connects blending tank；Blending tank is situated between with magnetic
Matter injector, magnetizing mediums extraction mechanism are connected, the connection superconduction magnetic separator of magnetizing mediums extraction mechanism.
Optimization, a kind of above-mentioned heavy-metal contaminated soil elution repair system, sludge dewatering system includes：It is sequentially connected
Soil sedimentation basin, soil dehydration machine and slurry pond, wherein soil sedimentation basin input end respectively with Magneto separate tank body overflow
Mouth is connected with mud discharging mouth, its water outlet is connected with slurry pond inducer, and the slurry pond port of export is mixed with muddy water respectively
Stirring pool is connected with roller-type stone washing machine.
Optimization, a kind of above-mentioned heavy-metal contaminated soil elution repair system, further includes recycle-water in-depth processing system,
Specifically include：Regulating reservoir, acid storage tank, iron-carbon micro-electrolysis retort, air compressor machine, Fenton reactive tanks, dioxygen water storage tank, flocculation aid
Storage tank, coagulative precipitation tank, sludge dewatering equipment, recycle-water storage pool, wherein, regulating reservoir and front end respectively with slurry pond and acid
Storage tank is connected, and wherein end is sequentially connected iron-carbon micro-electrolysis retort, Fenton reactive tanks, coagulative precipitation tank, sludge dewatering equipment
With recycle-water storage pool；Wherein Fenton reactive tanks and coagulative precipitation tank input end are stored up with dioxygen water store tank and flocculation aid respectively
Tank is connected；Pond and roller-type stone washing machine are mixed with muddy water and is connected coagulative precipitation tank supernatant water outlet respectively for recycle-water storage pool
It is connected with recycle-water storage pool.
Therefore, the utility model has the following advantages that：
(1) heavy metal is transferred in leacheate from soil by eluent, recycles magnetic medium as adsorption material
Expect, each metal ion species in quick adsorption leacheate, making it difficult to which the heavy-metal contaminated soil of reparation is recovered rapidly.
(2) magnetic medium is adsorbed under the action of high-intensity magnetic field in three-dimensional paramagnetic metal link network, passes through metal link network
Magnetizing mediums is taken out of and recycled by machine driving, improves the utilization rate of magnetic kind, reduces rehabilitation cost.
Brief description of the drawings
Fig. 1 is heavy-metal contaminated soil elution repair system schematic diagram；
Fig. 2 is the flow chart of heavy-metal contaminated soil elution repair system；
Fig. 3 is that magnetic kind adds influence of the batch to lead adsorption and lead accumulative removal amount；
Fig. 4 is that magnetic kind adds influence of the batch to arsenic adsorbance and arsenic accumulative removal amount；
In figure：1- heavy-metal contaminated soils, 2- soil storage feed bin, 3- soil crushers, the first belt feeders of 4.1-, 4.2-
Second belt feeder, the 3rd belt feeders of 4.3-, 4.4 the 4th belt feeders, 4.5 the 5th belt feeders, 5- cylinder roto-siofters, 6- rollers wash stone
Machine, 7- cleanings stone stack field, and pond, 9- hydrocyclones, 10- dewatering screens, the stacking of 11- cleanings sand is mixed in 8- muddy water
, 12- collecting tanks, 13- blending tanks, 14- magnetizing mediums injectors, 15- superconductions magnetic separator, 15.1- superconductors, 15.2- magnetic point
From tank body, 15.3- metal link networks, 16- system control cabinets, 17- refrigeration machines, 18- magnetizing mediums extraction mechanism, 18.1- one cyclonics
Separator, 18.2- secondary cyclones, 19- soil sedimentation basins, 20- soil dehydration machines, 21- cleaning soil, 22- washings are used
Pond, the online water quality testing meters of 23-, 24- regulating reservoirs, 25- acid storage tanks, 26- iron-carbon micro-electrolysis retort, 27- air compressor machines, 28-
Fenton reactive tanks, 29- dioxygen water storage tanks, 30- flocculation aid storage tanks, 31- coagulative precipitation tanks, 32- sludge dewatering equipments, 33- mud cakes,
34- recycle-water storage pools；Muddy water pump P1, muddy water pump P2, muddy water pump P3, muddy water pump P4, muddy water pump P6, vacuum pump P5, sludge pump
P7, sludge pump P11, clarified water pump P8, clarified water pump P9, clarified water pump P10, clarified water pump P12；Solenoid valve F1, solenoid valve F2, solenoid valve
F3, solenoid valve F4.
Embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment：
Fig. 1 is that the heavy-metal contaminated soil of the present embodiment elutes repair process technique, including the soil breaking being sequentially connected
System, soil argillaceous sand stone piece-rate system, superconduction magnetic separation system, sludge dewatering system and recycle-water in-depth processing system.
Fig. 2 is an a kind of optional specific implementation system equipment flow of heavy-metal contaminated soil elution repair system
Figure.
Wherein, soil breaking system is sequentially connected with group by soil storage feed bin 2,3 and first belt feeder 4.1 of soil crusher
Into.
The soil argillaceous sand stone piece-rate system includes：Pond 8, water is mixed in cylinder roto-siofter 5, roller-type stone washing machine 6, muddy water
The mixing of power cyclone 9, dewatering screen 10, the second belt feeder 4.2, the 3rd belt feeder 4.3 and the 4th belt feeder 4.4, wherein muddy water is stirred
Mix pond 8 and 6 input end of roller-type stone washing machine is connected with 5 fines of cylinder roto-siofter and the coarse fodder port of export respectively, roller-type stone washing machine 6 exports
End be connected with the 4th belt feeder 4.4, muddy water mixing pond 8, the 9 heavy burder port of export of hydrocyclone, 10 feed inlet of dewatering screen and
5th belt feeder 4.5 is sequentially connected, and 10 port of export of dewatering screen gently expects that the port of export is connected to superconducting magnetic point in the lump with hydrocyclone 9
From 12 input end of collecting tank in system, the 6 coarse fodder port of export of roller-type stone washing machine is connected with 10 feed inlet of dewatering screen.
The superconduction magnetic separation system includes collecting tank 12, blending tank 13, magnetizing mediums injector 14, superconduction magnetic separator
15th, system control cabinet 16, refrigeration machine 17 and magnetizing mediums extraction mechanism 18, wherein collecting tank 12, blending tank 13, superconduction magnetic separator
15 and magnetizing mediums extraction mechanism 18 be sequentially connected, the superconduction magnetic separator 15 respectively with 17 phase of system control cabinet 16 and refrigeration machine
Even, 12 input end of collecting tank is connected with the 9 light substance port of export of hydrocyclone and 10 water outlet of dewatering screen respectively；The blending tank
13 are provided with agitator arm and motor, and the top of blending tank 13 is provided with magnetizing mediums extraction mechanism and magnetizing mediums dispensing port, institute
Magnetizing mediums dispensing port is stated with magnetizing mediums injector 14 to be connected.
The superconduction magnetic separator 15 includes superconductor 15.1, Magneto separate tank body 15.2 and metal link network 15.3, described super
Conductor 15.1 can include high-temperature superconductor and cryogenic superconductor, the Magneto separate tank body with dismounting and change, the superconductor 15.1
15.2 include inlet, overflow port, mud discharging mouth and two pressure-vaccum horn mouths, and the inlet is connected with 13 discharge outlet of blending tank,
The overflow port is connected with 19 water inlet end of soil sedimentation basin in collecting tank 12 and sludge dewatering system respectively, the mud discharging mouth and dirt
19 water inlet end of soil sedimentation basin is connected in mud dewatering system, and the magnetizing mediums extraction mechanism 18 includes primary cyclone 18.1
With secondary cyclone 18.2, described two pressure-vaccum horn mouths one are positive pressure, and one is negative pressure, the one cyclonic separation
18.1 inlet port of device is connected with negative pressure horn mouth, outlet port and 18.2 air inlet of secondary cyclone, vacuum pump P5 and
Positive pressure horn mouth is sequentially connected.
The sludge dewatering system includes soil sedimentation basin 19, soil dehydration machine 20 and the slurry pond being sequentially connected
22, wherein 19 input end of soil sedimentation basin is connected with 15.2 overflow port of Magneto separate tank body and mud discharging mouth respectively, soil sedimentation basin 19
Water outlet and spoil disposal end are connected with slurry pond 22 and 19 input end of sludge concentration tank respectively, 22 port of export of slurry pond point
Pond 8 is not mixed with muddy water and 6 input end of roller-type stone washing machine is connected；It is provided with the 22 water outlet pipeline of slurry pond
Online water quality testing meter 23.
The recycle-water in-depth processing system includes regulating reservoir 24, acid storage tank 25, iron-carbon micro-electrolysis retort 26, air compressor machine
27th, Fenton reactive tanks 28, dioxygen water storage tank 29, flocculation aid storage tank 30, coagulative precipitation tank 31, sludge dewatering equipment 32 and recycle-water
Storage pool 34, wherein, 24 front end of regulating reservoir is connected with slurry pond 22 and acid storage tank 25 respectively, its end is sequentially connected iron carbon
Micro-electrolysis reaction tank 26, Fenton reactive tanks 28, coagulative precipitation tank 31, sludge dewatering equipment 32 and recycle-water storage pool 34；Wherein
Fenton reactive tanks 28 and 31 input end of coagulative precipitation tank are connected with dioxygen water store tank 29 and flocculation aid storage tank 30 respectively；Reuse
Pond 8 is mixed with muddy water respectively for 34 port of export of water storage pool and roller-type stone washing machine 6 is connected, 31 supernatant water outlet of coagulative precipitation tank
End is connected with 34 input end of recycle-water storage pool；Wherein described acid storage tank 25 is at least one in storage industry sulfuric acid or hydrochloric acid
Kind, the flocculation aid storage tank 30 is used to store polyacrylamide solution.
The soil storage feed bin 2 is used for the temporary and system feeding of heavy-metal contaminated soil, and the feed bin side wall is equipped with
Broken arch motor and plate vibrator, prevent blanking from blocking；The pulverizer 3 is used for the broken of contaminated soil and its impurity；It is described
Belt feeder 4.1 is used to the soil after crushing being delivered in cylinder roto-siofter.
The cylinder roto-siofter 5 is used for the soil after sieving approach, isolates containing the coarse fodder more than 10mm and is less than
The fines of 10mm, the cylinder roto-siofter 5 are made of mechanisms such as motor, gear reducer, drum apparatus, racks, wherein drum apparatus
It is in tilted layout, motor links together, driving drum mechanism is rotatable around its axis, described time through gear reducer with cylinder mechanism
Turn sieve drum apparatus by body seal cap sealing, so as to ensure that equipment during the work time, effectively prevents dust pollution；Through circle
The coarse fodder isolated of cylinder roto-siofter 5 is delivered to roller-type stone washing machine 6 by the 3rd belt feeder 4.3, and the clean stone isolated is through the
Four belt feeders 4.4 are delivered to clean stone and stack field 7, and the mud obtained after separation is collected through 6 underdrain groove of roller-type stone washing machine
After enter in dewatering screen 10, the roller-type stone washing machine 6 for cylinder roto-siofter 5 screen out come coarse fodder elution, by thick
Material and current, coarse fodder and the mutual friction of equipment inner wall and coarse fodder realize coarse fodder and its surface is fine grain separates；Particle diameter
Fines less than 10mm is delivered to muddy water through the second belt feeder 4.2 and is mixed in pond 8, and the muddy water is mixed pond 8 and is used for
Water and fines are mixed with mud mixture, are separated to by being stirred heavy metal from soil in water；The waterpower rotation
Stream device 9 is used to separate the larger fine particle of proportion in muddy water；The dewatering screen 10 is used to separate to be handled by hydrocyclone
Moisture in the thin particulate matter obtained afterwards.
The collecting tank 12 is used for the light substance for collecting 10 water outlet of dewatering screen and cyclone separator 9 gives off；The mixing
Tank 13 quantifies water for collecting tank and is mixed with magnetizing mediums, and the magnetizing mediums comes from magnetizing mediums extraction mechanism 18 and magnetizing mediums sample introduction
Device 14；The magnetizing mediums injector 14 supplements magnetic medium into blending tank for quantitative；The superconduction magnetic separator 15 is wrapped
Superconductor 15.1, Magneto separate tank body 15.2 and metal link network 15.3 are included, the superconductor 15.1 is used for superconduction magnetic separator 15
Inside provides predetermined high-gradient magnetic field；The Magneto separate tank body 15.2 is used to collect the muddy water that storage is mixed with magnetic medium；Institute
State the magnetisable material that can be adsorbed after metal link network 15.3 is magnetized in high-gradient magnetic field in water；The magnetizing mediums extraction mechanism 18
The magnetic medium of heavy metal is adsorbed with metal link network 15.3 for separating and collecting；The primary cyclone 18.1 and two level
Cyclone separator 18.2 is used to separate the magnetic medium in gas, and the magnetic medium isolated is back to use blending tank 13 again
In.
The soil sedimentation basin 19 is used to precipitate the muddy water of qualified discharge and magnetic after the processing of superconduction magnetic separation system and is situated between
The bed mud of matter extraction mechanism discharge；The soil dehydration machine 20 is used for the dehydration of sludge slurry；The slurry pond 22 is used to receive
Collect 20 pressure filtration yielding water of supernatant and soil dehydration machine of the discharge of mudpan 19, and pond 8 and roller is mixed for muddy water
6 offer water of stone scrubber；The online water quality testing meter 23 of water quality is used to monitor water quality condition in slurry groove, the water quality
Situation includes COD (COD), ammonia nitrogen, pH and dissolved oxygen.
The regulating reservoir 24 is used for the pH value for adjusting the waste water not up to standard of the discharge of slurry pond 22；The acid storage tank 25 is used
Stored in acid solution and pH adjustings are carried out according to water quality in regulating reservoir and water volume condition, quantitative addition acid solution；The micro- electricity of iron carbon
Solution retort 26 is used to handle the acid waste water discharged in regulating reservoir 24, using the difference in Electrode Potential between Fe and C there are 1.2V,
Countless micro cell systems is formed, a large amount of Fe produced on anode2+By Quick Oxidation into Fe3+, being formed, there is higher absorption to wad a quilt with cotton
Coagulate the flocculant of activity；Cathode reaction produces the hydroxyl of a large amount of nascent states, under conditions of slant acidity, the equal energy of these active ingredients
Redox reaction occurs with many components in waste water, makes organic macromolecule that chain-scission degradation occur；The air compressor machine 27 is used for
Air is passed through into iron-carbon micro-electrolysis retort 26, accelerates Fe2+Oxidation rate；The Fenton reactive tanks 28 utilize addition
H2O2With the Fe of light electrolysis generation2+React the hydroxyl radical free radical attack organic molecule with strong oxidizing property produced, further ore deposit
Change the organic matter for decomposing and not removed in water by light electrolysis；The dioxygen water storage tank 29 is used for H2O2Store and quantitative to Fenton
H is added in reactive tank 282O2；The flocculation aid storage tank 30 is stored for polyacrylamide solution, and according to 31 water of coagulative precipitation tank
Matter and the quantitative addition polyacrylamide solution of water volume condition；The coagulative precipitation tank 31 passes through sewage and flocculation aid polyacrylamide
Amine aqueous solution mixes, and the particle for enabling to be difficult to precipitate in water is aggregated with one another to form colloid, and then precipitates separation；The sludge dewatering equipment
32 are used to carry out mud-water separation to the sludge of 31 bottom of coagulative precipitation tank discharge；The recycle-water storage pool 34 is used for coagulating sedimentation
The collection storage of 32 pressure filtration yielding water of 31 supernatant of pond and sludge dewatering equipment, and pond 8 is mixed for roller-type stone washing machine 6 and muddy water and carries
For water.
With the above structure, the present embodiment, which additionally provides, a kind of utilizes above-mentioned system to carry out heavy-metal contaminated soil leaching
The method for washing reparation, concretely comprises the following steps：
(1) soil breaking
Heavy-metal contaminated soil 1 is stored in soil storage feed bin 2, by the soil crusher 3 for being arranged on bin bottom
Bulk soil is crushed, the soil particle after crushing is delivered in cylinder roto-siofter 5 through the first belt feeder 4.1 to be sieved
Point.
(2) soil argillaceous sand stone separates
Soil after broken enters in cylinder roto-siofter 5 and is sieved, and thick material is from 5 lower end discharge port of cylinder roto-siofter
Screen out and, thin material 5 upper end outlets from cylinder roto-siofter are separated, and screen out the thick material come through the 3rd belt feeder
4.3 are delivered in roller-type stone washing machine 6 and are rinsed, and obtain clean stone, and being delivered to clean stone through the 4th belt feeder 4.4 stacks
7, the muddy water collecting pit that the muddy water of generation is set through 6 bottom of roller-type stone washing machine enters back into dewatering screen 10 into one after being collected
Step isolates small particle；Cylinder roto-siofter 5 screens out the fines come and is delivered to muddy water mixing pond through the second belt feeder 4.2
In 8, thin material is mixed in pond 8 in muddy water with detergent water and is thoroughly mixed to form mud mixture solution, the muddy water of generation
It is delivered to through muddy water pump P1 in hydrocyclone 9, the light component in muddy water is entered in the collecting tank 12 of superconduction magnetic separation system,
9 outlet at bottom of the restructuring lease making such as sand in muddy water hydrocyclone exits into dewatering screen 10 and carries out girt-water separation, residual
Fine particle on 10 top of dewatering screen is delivered to clean sand through the 5th belt feeder 4.5 and stacks field 11.
(3) superconduction Magneto separate
The muddy water that the muddy water and dewatering screen 10 that top comes out in hydrocyclone 9 come through muddy water pump P2 conveyings is in collecting tank
Mixed in 12；Mixing muddy water is quantitatively transferred in blending tank 13 through muddy water pump P3, according to 13 water of blending tank and water quality condition, is led to
The quantitative addition magnetic medium of magnetizing mediums injector 14 is crossed, then by the built-in stirring system in blending tank 13, by magnetism
Medium is sufficiently mixed with muddy water；The muddy water for being mixed with magnetizing mediums is delivered in superconduction magnetic separator 15 through muddy water pump P4, in superconduction
Under the High-gradient Magnetic field action that body 15.1 provides, the metal link network 15.3 inside Magneto separate tank body 15.2 is adsorbed in water after being magnetized
Magnetisable material, with the rotation of metal link network 15.3, the magnetic medium for being adsorbed with heavy metal is carried over liquid level, then passes through magnetic
Medium extraction mechanism 18 is recycled；Under vacuum pump P5 effects, pass through two be arranged on Magneto separate tank body 15.2
Pressure-vaccum horn mouth separates magnetizing mediums from metal link network 15.3, then sequentially enters primary cyclone 18.1 and two level
Magnetic kind recycling is carried out in cyclone separator 18.2, the magnetic kind being recovered to is added in blending tank 13 again and is recycled；
Muddy water after the processing of superconduction magnetic separator 15, if heavy metal concentration detection is exceeded, solenoid valve F1 is opened and solenoid valve F2
Close, muddy water is back in collecting tank 12 through muddy water pump P6 and is reprocessed；Otherwise solenoid valve F1 is opened and solenoid valve F2 is closed,
Muddy water is delivered in soil sedimentation basin 19 through muddy water pump P6.
(4) sludge dewatering
Bottom is arranged in heavy metal concentration permitted discharge and superconduction magnetic separator 15 after the processing of superconduction magnetic separator 15
The sludge put together enters and mud-water separation is carried out in soil sedimentation basin 19, and 19 supernatant of soil sedimentation basin enters slurry
In pond 22, base sludge is delivered to soil dehydration machine 20 by sludge pump P7 and carries out carry out mud-water separation, and cleaning is obtained after press filtration
Soil 21, press filtration water are delivered in slurry pond 22, when the water collected in slurry pond 22 is through online water quality testing meter 23
When detecting up to standard, solenoid valve F3 is opened and F4 is closed, and clarified water pump P12 is closed, and 22 water outlet of slurry pond flows back through clarified water pump P8
It is mixed to muddy water in pond 8 and roller-type stone washing machine 6；Otherwise solenoid valve F3 is closed and F4 is opened, 22 water outlet of slurry pond warp
Clarified water pump P8 is delivered to regulating reservoir 24, and clarified water pump P12 is opened, and 34 water outlet of recycle-water storage pool is delivered to mixing through clarified water pump P12
In stirring pool 8 and roller-type stone washing machine 6.
(5) recycle-water in-depth is handled
Free state heavy metal is largely removed after the processing of superconduction magnetic separator 15 in soil, due to possible in soil
The existing poisonous and harmful hardly degraded organic substance of solubilised state, these organic matters are individually difficult to remove separation by superconduction Magneto separate, therefore
These organic matters can be caused to accumulate during the recycling of slurry, when organic concentration is exceeded in slurry pond 22
When, 22 water outlet of slurry pond is delivered to regulating reservoir 24 through clarified water pump P8, according to water water and water quality situation, is stored up by acid solution
The quantitative addition acid solution of tank 24, is adjusted to 3-4, acid waste water is delivered to iron-carbon micro-electrolysis through clarified water pump P9 from bottom by solution ph
In retort 26, and air is blasted by air compressor machine 27 inwards, due to the difference in Electrode Potential between Fe and C there are 1.2V, thus
Countless micro cell systems can be formed, iron is anode, and cementite is cathode, and electrode reaction is：Anode Fe-2e → Fe2+, Fe2+/
Fe=-0.44V；Cathode 2H++ 2e → 2 [H], H+/ H2=-0.00V, in water under Effect of Dissolved Oxygen, what is produced on anode is a large amount of
Fe2+By Quick Oxidation into Fe3+, form the flocculant with higher adsorption-flocculation activity；Cathode reaction produces a large amount of nascent states
Hydroxyl, under conditions of slant acidity, with many components in waste water redox reaction can occur for these active ingredients, make to have
Chain-scission degradation occurs for machine macromolecular；Carry not oxidized Fe2+Waste water is entered in Fenton reactive tanks 28, then by double
Oxygen water storage tank 29 is quantitatively adding H2O2, make H2O2With the Fe of light electrolysis generation2+Fenton reagent is formed, it is strong to react having for generation
The hydroxyl radical free radical attack organic molecule of oxidisability, further mineralising decomposing organic matter, and achieve the purpose that organics removal；Place
Water after reason is delivered to coagulative precipitation tank 31 through clarified water pump P10, and being quantitatively adding flocculation aid by flocculation aid storage tank 30 accelerates iron wadding
The precipitation separation of solidifying body, 31 supernatant of coagulative precipitation tank are delivered in recycle-water storage pool 34,31 base sludge of coagulative precipitation tank
Sludge dewatering equipment 32 is delivered to through sludge pump P11 and carries out press filtration, obtains mud cake 33, press filtration water enters recycle-water storage pool 34
In, when 22 overproof water quality of slurry pond, the water in recycle-water storage pool 34 is delivered to muddy water through clarified water pump P12 and is mixed
In pond 8 and roller-type stone washing machine 6.
Repair system and method are eluted for a kind of heavy-metal contaminated soil of the utility model, passes through following case history
Analysis verification is carried out to above-mentioned implementation result, is specifically described as follows：
Embodiment 1：
Hunan mine pollution site remediation project, the place soil major pollutants are needed based on heavy metal lead and arsenic
It is 41000m to want rehabilitating soil earth volume3, repaired using the heavy-metal contaminated soil elution repair system of the utility model,
In the case of Soil leaching device systems normal duty, average treatment amount is 150m3/ h, system carrying out practically process are as shown in Figure 2.
The contaminated soil come out from soil storage feed bin 2 is crushed by soil crusher 3, it is broken after soil particle through the
One belt feeder 4.1, which is delivered in cylinder roto-siofter 5, to be sieved.
Particle diameter through being screened out in cylinder roto-siofter 5 is delivered to roller through the 3rd belt feeder 4.3 more than 10mm materials and washes stone
Machine 6 is rinsed, and obtained coarse fodder is delivered to clean stone through the 4th belt feeder 4.4 and stacks field 7, and the muddy water of generation is after collection
Dewatering screen 10 is delivered to be sieved；It is defeated through the second belt feeder 4.2 that the particle diameter screened out in cylinder roto-siofter 5 is less than 10mm materials
Send to muddy water and pond 8 is mixed, by adding water to be mixed, the muddy water of generation is delivered to hydrocyclone 9 through muddy water pump P1, obtains
To heavy material be flowed into dewatering screen 10 progress coarseparticulate separation from 9 bottom of hydrocyclone, from 9 top of hydrocyclone
The light material of outflow and 10 water outlet of dewatering screen enter collecting tank 12 in the lump.
Sewage is quantitatively transferred in blending tank 13 through muddy water pump P3 in collecting tank 12, then fixed by magnetizing mediums injector 14
The addition magnetic medium of amount, is sufficiently mixed under magnetizing mediums stirring system effect built-in in blending tank 13 with muddy water；It is mixed with
The muddy water of magnetizing mediums is delivered in superconduction magnetic separator 15 through muddy water pump P4, is made in the high-gradient intense magnetic field that superconductor 15.1 produces
Under, built-in rotatable metal link network 15.3 will be adsorbed with the magnetic medium drag-out of heavy metal in superconduction magnetic separator 15
Face, is then blown out from metal link network 15.3 magnetic medium using sky mouth of blowing the trumpet, and is entered in cyclone separator and carried out
Solid and gas separates, and obtained magnetic medium is rejoined in blending tank 13 and recycled；Non magnetic bulky grain in leachates
Thing is deposited to 15 lower part of superconduction magnetic separator, and periodically sediment is delivered in soil sedimentation basin 19, muddy water after processing
When middle heavy metal concentration is exceeded, muddy water is back in collecting tank 12 again, otherwise flows into the soil precipitation in sludge dewatering unit
Pond 19.
19 supernatant of soil sedimentation basin is entered in slurry pond 22, and base sludge is delivered to soil by sludge pump P7
Dewaterer 20 carries out carry out mud-water separation, and clean soil 21 is obtained after press filtration, and press filtration water is delivered in slurry pond 22, when washing
When washing the water collected in millpond 22 and detecting up to standard through online water quality testing meter 23, solenoid valve F3 is opened and F4 is closed, clarified water pump
P12 is closed, and 22 water outlet of slurry pond is back to muddy water through clarified water pump P8 and is mixed in pond 8 and roller-type stone washing machine 6；Otherwise electricity
Magnet valve F3 is closed and F4 is opened, and 22 water outlet of slurry pond is delivered to regulating reservoir 24 through clarified water pump P8, and clarified water pump P12 is opened, and is returned
It is delivered to and is mixed in pond 8 and roller-type stone washing machine 6 through clarified water pump P12 with 34 water outlet of water storage pool.
When organic concentration is exceeded in slurry pond 22,22 water outlet of slurry pond is delivered to regulating reservoir through clarified water pump P8
24, according to water water and water quality situation, by the quantitative addition acid solution of acid solution storage tank 24, solution ph is adjusted to 3-4, it is acid
Waste water is delivered in iron-carbon micro-electrolysis retort 26 through clarified water pump P9 from bottom, and blasts air inwards by air compressor machine 27,
Under oxygen in water effect, a large amount of Fe for being produced on anode2+By Quick Oxidation into Fe3+, being formed has higher adsorption-flocculation activity
Flocculant；Cathode reaction produces the hydroxyl of a large amount of nascent states, under conditions of slant acidity, these active ingredients energy and waste water
In many components occur redox reaction, make organic macromolecule occur chain-scission degradation；Carry not oxidized Fe2+Waste water
Enter in Fenton reactive tanks 28, H is then quantitatively adding by dioxygen water storage tank 292O2, make H2O2With the Fe of light electrolysis generation2 +Fenton reagent is formed, reacts the hydroxyl radical free radical attack organic molecule with strong oxidizing property of generation, further mineralising is decomposed
Organic matter, and achieve the purpose that organics removal；Water after processing is delivered to coagulative precipitation tank 31 through clarified water pump P10, by helping
Solidifying agent storage tank 30 is quantitatively adding the precipitation separation that flocculation aid accelerates iron floccule body, and 31 supernatant of coagulative precipitation tank is delivered to recycle-water
In storage pool 34,31 base sludge of coagulative precipitation tank is delivered to sludge dewatering equipment 32 through sludge pump P11 and carries out press filtration, obtains mud cake
33, press filtration water is entered in recycle-water storage pool 34, when slurry pond overproof water quality, the water warp in recycle-water storage pool 34
Clarified water pump P12 is delivered to muddy water and is mixed in pond 8 and roller-type stone washing machine 6.
From figs. 3 and 4 it can be seen that being continuously added with magnetic medium, Heavy Metals in Contaminated Soils lead and arsenic accumulation
Removal amount first raises, after tend to be steady, often handle 1000m3Contaminated soil, the lead that can be removed and arsenic weight are respectively 1800g
And 100g；
Heavy-metal contaminated soil accumulated process amount and lead and arsenic leaching concentration relation are as shown in table 1.As it can be seen from table 1
Maximum leaching concentration difference 0.056mg/L, 0.041mg/L of before processing, Heavy Metals in Contaminated Soils lead and arsenic, by this practicality
After novel system processing, the leaching concentration of heavy metal in soil lead and arsenic is all far below environmental standard value 0.01mg/L, 0.01mg/
L, handling result are completely up to standard.
Table 1
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Described specific embodiment can be done various modifications or additions or using similar by belonging to those skilled in the art
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (4)
1. a kind of heavy-metal contaminated soil elutes repair system, it is characterised in that including：The soil breaking system that is sequentially connected,
Soil argillaceous sand stone piece-rate system, superconduction magnetic separation system, sludge dewatering system；Wherein, soil breaking system includes：Soil stores
Feed bin, soil crusher and belt feeder；Superconduction magnetic separation system includes：Import and the hydrocyclone light substance port of export, dehydration
Sift out the collecting tank that water end (W.E.) is connected；Collecting tank connects blending tank；Blending tank and magnetizing mediums injector, magnetizing mediums extraction mechanism phase
Even, magnetizing mediums extraction mechanism connection superconduction magnetic separator；
Magnetizing mediums extraction mechanism and magnetizing mediums dispensing port, the magnetizing mediums dispensing port and magnetizing mediums are provided with above the blending tank
Injector is connected.
A kind of 2. heavy-metal contaminated soil elution repair system according to claim 1, it is characterised in that
Soil argillaceous sand stone piece-rate system includes：Sequentially connected cylinder roto-siofter, muddy water are mixed pond, hydrocyclone, take off
Water sieve；The import of cylinder roto-siofter is connected with belt feeder, and pond, coarse fodder outlet connection rolling is mixed in connection muddy water in its fines outlet
Cylinder stone scrubber, the roller-type stone washing machine coarse fodder port of export are connected with belt feeder, the muddy water collecting tank water outlet that cylinder stone scrubber bottom is set
End is connected with dewatering screen feed inlet.
A kind of 3. heavy-metal contaminated soil elution repair system according to claim 1, it is characterised in that sludge dewatering system
System includes：Soil sedimentation basin, soil dehydration machine and the slurry pond being sequentially connected, wherein soil sedimentation basin input end respectively with
Magneto separate tank body overflow port is connected with mud discharging mouth, its water outlet is connected with slurry pond inducer, the slurry pond port of export
Pond is mixed with muddy water respectively and cylinder stone scrubber is connected.
4. a kind of heavy-metal contaminated soil elution repair system according to claim 1, it is characterised in that further include reuse
Depth of water processing system, specifically includes：It is regulating reservoir, acid storage tank, iron-carbon micro-electrolysis retort, air compressor machine, Fenton reactive tanks, double
Oxygen water storage tank, flocculation aid storage tank, coagulative precipitation tank, sludge dewatering equipment, recycle-water storage pool, wherein, regulating reservoir front end respectively with
Slurry pond is connected with acid storage tank, and wherein end is sequentially connected iron-carbon micro-electrolysis retort, Fenton reactive tanks, coagulating sedimentation
Pond, sludge dewatering equipment and recycle-water storage pool；Wherein Fenton reactive tanks and coagulative precipitation tank input end are stored up with hydrogen peroxide respectively
Tank is connected with flocculation aid storage tank；Pond is mixed with muddy water respectively for recycle-water storage pool and cylinder stone scrubber is connected, coagulating sedimentation
Pond supernatant water outlet is connected with recycle-water storage pool.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108905984A (en) * | 2018-07-23 | 2018-11-30 | 山东建筑大学 | A kind of magnetic microsphere restorative procedure of copper cadmium pollution river water body and bed mud |
| CN110340124A (en) * | 2019-07-16 | 2019-10-18 | 煜环环境科技有限公司 | A kind of contaminated soil remediation governing system |
-
2017
- 2017-03-23 CN CN201720287143.4U patent/CN207343444U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108905984A (en) * | 2018-07-23 | 2018-11-30 | 山东建筑大学 | A kind of magnetic microsphere restorative procedure of copper cadmium pollution river water body and bed mud |
| CN108905984B (en) * | 2018-07-23 | 2021-04-27 | 山东建筑大学 | Magnetic microsphere repairing method for copper-cadmium polluted river water body and bottom mud |
| CN110340124A (en) * | 2019-07-16 | 2019-10-18 | 煜环环境科技有限公司 | A kind of contaminated soil remediation governing system |
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