CN208743348U - Dump leaching-ozone cooperative decyanation processing system - Google Patents
Dump leaching-ozone cooperative decyanation processing system Download PDFInfo
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- CN208743348U CN208743348U CN201821214841.2U CN201821214841U CN208743348U CN 208743348 U CN208743348 U CN 208743348U CN 201821214841 U CN201821214841 U CN 201821214841U CN 208743348 U CN208743348 U CN 208743348U
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- ozone
- elution
- soil
- cyanogen
- processing system
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- 238000012545 processing Methods 0.000 title claims abstract description 34
- 238000007255 decyanation reaction Methods 0.000 title claims abstract description 22
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000002689 soil Substances 0.000 claims abstract description 58
- 238000010828 elution Methods 0.000 claims abstract description 52
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 18
- 230000003647 oxidation Effects 0.000 claims abstract description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 238000006385 ozonation reaction Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 238000002386 leaching Methods 0.000 claims description 11
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- 238000005273 aeration Methods 0.000 claims description 2
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- 125000000896 monocarboxylic acid group Chemical group 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 abstract description 42
- 238000000034 method Methods 0.000 abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 5
- 239000007921 spray Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000003673 groundwater Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 10
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
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- 239000000243 solution Substances 0.000 description 5
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229960004643 cupric oxide Drugs 0.000 description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate group Chemical group [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- IWYDHOAUDWTVEP-ZETCQYMHSA-N (S)-mandelic acid Chemical compound OC(=O)[C@@H](O)C1=CC=CC=C1 IWYDHOAUDWTVEP-ZETCQYMHSA-N 0.000 description 1
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- 238000003723 Smelting Methods 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000012491 analyte Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
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- 125000004093 cyano group Chemical group *C#N 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- MXZVHYUSLJAVOE-UHFFFAOYSA-N gold(3+);tricyanide Chemical compound [Au+3].N#[C-].N#[C-].N#[C-] MXZVHYUSLJAVOE-UHFFFAOYSA-N 0.000 description 1
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- 238000013508 migration Methods 0.000 description 1
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- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 description 1
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- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a kind of dump leaching-ozone cooperative decyanation processing systems, it except cyanogen system and is eluted except cyanogen system is constituted including mound system, ozone oxidation, it realizes and cyanide in soil is dissolved in leacheate to being piled into the soil spray leacheate for building heap, while operate the process of cyanide generates environmental sound by two-step oxidation in leacheate nitrogen and carbonate by being passed through ozone into leacheate；The dump leaching-ozone cooperative decyanation processing system structure is simple, easy to operate, and will not cause secondary pollution to neighbouring soil and groundwater in treatment process, and decyanation is high-efficient, while elution therein removes the recycling to wastewater eluting of cyanogen system, energy conservation and environmental protection.
Description
Technical field
The utility model relates to technical field of soil remediation, in particular to a kind of dump leaching-ozone cooperative decyanation processing system.
Background technique
Cyanide refers to the compound containing cyano, mainly exists in nature with inorganic and organic two kinds of compounds, common
Inorganic cyanide have simple cyanide, complex cyanide, rhodanate etc.；Organic cyanide has the nitriles such as acetonitrile, propionitrile
Close object.Wherein hydrogen cyanide is the most common form, has amygdalate taste.Various forms of cyanides poison all with higher
Property, short term contact, which can lead to, is short of breath, twitches and other influences to nervous system, if Long Term Contact can make weight rapid drawdown,
Damage thyroid gland and nerve are influenced, it even can be lethal when serious.If improper use, it is serious that a large amount of pollutants containing cyanogen can be generated immediately
Threaten human health.Due to cyanogen root have good complexing, surface-active, activity function, in recent years cyanide gold smelting,
The industries such as intermetallic composite coating, plating, organic chemical industry are widely used, therefore also bring soil cyanide pollution problem.
Natural degradation speed is much more slowly than its degradation speed in natural water body to cyanide in the soil, in soil profile
The migration behavior of cyanide is similar to the migratory behaviour of lyotropic salt in soil.Under the conditions of arid, semiarid climate, cyanogen in section
Compound can be highly enriched in soil surface salt crust.Cement layer in soil profile can partially obstruct cyanide and transport into diving
It moves, result can lead to highly enriched [7] of cyanide in argillaceous soil layer again.Cyanide in soil is equal to the growth of plant
There is serious influence.Pollution source in environment is become by the soil of cyanide pollution, to ground surface environment, land use and ground
Face water, underground water have long-term potential hazard.Therefore, there is an urgent need to repair to the soil of cyanide pollution.
Heap Leaching is a kind of Wet-process metallurgy method, can be by low-grade hundred gold and silver ore, cupric oxide ore or cupric abandoned mine
Equal materials are broken to certain particle size, are deposited on the leakproof heelpiece by pitch, concrete or plastic or other material making, with low concentration cyanogen
The solution such as compound, alkaline solution, innoxious solvent or dilute sulfuric acid spray on mine heap, dissolve gold, silver or copper, contain gold, silver or copper
Solution, be percolated and come out from mine heap, then with activated carbon adsorption, zinc powder or iron replacement precipitating the methods of recycling gold, silver or
Copper.Tail washings after absorption or displacement can return to use.The advantages of this method is that process flow is brief, easily operated, scale can greatly may be used
Small, small investment, producing cost are lower, the potentiality being widely used.It can be used for developing that ore body is small or grade is low, or both it is simultaneous
The mineral deposit that has, and cannot be developed and used with conventional method, such as low-grade hundred gold and silver ore, cupric oxide ore.
Publication CN201621328300.3 discloses a kind of processing system of cyanide polluted soil, the processing system
System includes mound system, elution circuit and processing system；It is realized using dystopy elution circuit and mode, improves the infiltration in soil heap
Filter effect.However, the processing system and the corresponding restorative procedure existing defects realized are: containing a large amount of cyanogen in leacheate
Compound needs individual oxidation unit, increases exposure by adding the cyanide in hypochlorite oxidation leacheate,
And adding a large amount of sodium hypochlorite is continuously improved the salt content of leacheate, while cyanide is reduced in soil, will adsorb
More salt, subsequent processing disposition are difficult, it is therefore necessary to the processing system of the soil containing cyanide be further improved,
To overcome drawbacks described above.
Utility model content
The purpose of the utility model is to provide one kind to overcome above-mentioned existing treatment process defect, realizes dump leaching-ozone cooperative
Dump leaching-ozone cooperative decyanation processing system that decyanation technology is implemented.
For this purpose, technical solutions of the utility model are as follows:
A kind of dump leaching-ozone cooperative decyanation processing system, including mound system, ozone oxidation except cyanogen system and are eluted except cyanogen
System；Wherein,
The mound system includes charge for remittance ditch, the cofferdam for surrounding charge for remittance ditch and being disposed there above on ground, in hillside shape
The soil containing cyanogen that the heelpiece and trapezoidal mesa-shaped that accumulation is laid in cofferdam are deposited in above heelpiece builds heap；On the ground in neighbouring cofferdam
The a plurality of fluid passage being connected to the formation of charge for remittance ditch is along the circumferential direction offered on face；
The elution is except the more elution that cyanogen system includes that an at least row is successively parallel on building heap top surface and is intervally arranged
Pipe, and be arranged in the elution flow container with agitating device of the mound system neighbour side, centrifugal pump, NaOH dosing tank,
CHCOOH dosing tank and one are vertically arranged in ozone snorkel in elution flow container；Wherein, NaOH dosing tank and CHCOOH dosing
Case passes through liquor charging pipeline respectively and is connected in elution flow container；Flow container is eluted to connect by the liquid feeding end of a perfusion tube and centrifugal pump
And form connection；The liquid feeding end one that the outlet end of centrifugal pump passes through a supervisor I with more branched pipes and more elution pipes
One connects and forms connection；Elution flow container also passes through a leacheate waste liquid delivery pipe and connect with charge for remittance ditch and form connection；
The ozone oxidation includes ozone generator, blower and more successively along the slope surface fluctuating side of heelpiece except cyanogen system
The ozonation aerated pipe of an at least row arranged to parallel interval；Ozone generator is connected by the inlet end of an appendix and blower
And connection is formed, the inlet end that the outlet side of blower passes through supervisor an II and more ozonation aerated pipes with more branched pipes
And the ozone snorkel being arranged in elution flow container connects one by one and forms connection.
It is preferred that heelpiece is accumulated to be formed using sandstone or soil containing cyanogen, and its upper surface is equipped with one layer of HDPE or PVC and prevents
Seep film.
It is preferred that the percent opening for the venthole being provided on every ozonation aerated pipe is 30~40%, the aperture of venthole is straight
Diameter is 1~5mm.
It is preferred that the percent opening for the apopore being provided on every elution pipe is 30~40%, the opening diameter of apopore is 1
~5mm.
It is preferred that the outer layer in every ozonation aerated pipe is coated with layer of non-woven fabric.
It is preferred that it is 5~8 ° that heelpiece, which is formed by angle between slope and horizontal direction,
It is preferred that the height for building heap is 1.5~4m, angle of repose is 35~40 °.
The dump leaching-ozone cooperative decyanation processing system realizes following treatment process:
Heap place is built in S1, finishing；
S2, leacheate is sprayed by elution Guan Xiangzhu heap, leacheate is made gradually to infiltrate soil particle table first from top to bottom
Face, then leacheate is to spreading inside particle, is dissolved in the cyanide between particle and inside particle in leacheate；
At the same time, the mixed gas containing ozone is pumped to by ozonation aerated pipe from bottom to top and builds heap, make ozone
Contacting with leacheate and aoxidizing cyanide is cyanate, and further cyanate continues to generate nitrogen and carbonic acid salinity with ozone reaction
Soil is discharged not in the form of gas phase and liquid phase.Specific reaction process is as follows:
CN-+O3=CNO-+O2(1),
2CNO-+3O3+H2O=N2+2HCO3 -+3O2(2)；
Wherein, leacheate is formed using sodium hydroxide solution and sodium acetate solution mixed preparing, and pH value is 10~11；
Mixed gas is the mixed gas of ozone and air；
S3, collection deposit to the ring waste for building heap bottom, and the mixed gas containing ozone is pumped into ring waste
Cyanide into ring waste is oxidized completely；The process allow for leacheate deposit to build time of heap bottom compared with
It is short, it cannot be guaranteed that all cyanides all complete the oxidation process in two stages, it is fully converted to nitrogen and carbonate, therefore to
Continue to be passed through ozone in ring waste, is oxidized cyanide completely；
S4, repeat the above steps S2~S3, until soil in cyanide be completely removed, that is, be fully converted to nitrogen and
The form of carbonate.
Compared with prior art, the dump leaching-ozone cooperative decyanation processing system structure is simple, easy to operate, smelly by being arranged
Oxygen oxidation removes cyanogen system except cyanogen system and elution, realizes and is converted into pair after carrying out two-step oxidation after the cyanide dissolution in soil
Environmentally friendly nitrogen and carbonate, decyanation is high-efficient, and will not cause to neighbouring soil and groundwater in treatment process secondary
Pollution, while elution therein removes the recycling to wastewater eluting of cyanogen system, energy conservation and environmental protection.
Detailed description of the invention
Fig. 1 is dump leaching-ozone cooperative decyanation processing system structural schematic diagram of utility model.
In figure: 1, building heap, 2, heelpiece, 3, charge for remittance ditch, 4, ozone generator, 5, blower, 6, ozone snorkel, 7, stirring
Device, 8, pH meter, 9, NaOH dosing tank, 10, CH3COONa dosing tank, 11, centrifugal pump, 12, elution pipe, 13, ozonation aerated pipe,
14, cofferdam.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described further the utility model, but following embodiments are right absolutely not
The utility model has any restrictions.
As shown in Figure 1, a kind of dump leaching for the treatment process that can be realized embodiment 1-ozone cooperative decyanation processing system, tool
Body includes mound system, ozone oxidation except cyanogen system and elution remove cyanogen system；It builds heap stringing, containing cyanogen soil by what is successively carried out
The removing of cyanide in soil is realized in earth elution, the ozone cooperative decyanation of soil containing the cyanogen processing containing leacheate, is finally made in soil
Cyanide be decomposed into nitrogen and carbonate, and respectively in the form of gas phase and liquid phase be discharged soil.
Wherein, the mound system includes the charge for remittance ditch 3 dug below ground, surround charge for remittance ditch 3 and be disposed thereon
Cofferdam 14 on square ground, the heelpiece 2 being laid in cofferdam 14 in the accumulation of hillside shape and trapezoidal mesa-shaped are deposited in 2 top of heelpiece
Soil containing cyanogen build heap 1；The ozone oxidation includes that ozone generator 4, blower 5 and nine are equipped with aperture except cyanogen system
Ozonation aerated pipe 13；The elution includes four elution pipes 12 for being equipped with aperture except cyanogen system, and is arranged in the heap soil series
The elution flow container 7 with agitating device, centrifugal pump 11, the NaOH dosing tank 9, CH of the adjacent side of system3COOH dosing tank 10 and ozone are sent
Tracheae 6；Specifically,
(1) soil containing cyanogen is carried out first building heap stringing operation:
The volume that digs below ground in predetermined position is 100m3Charge for remittance ditch 3, and on the ground above charge for remittance ditch 13
Piling up in a manner of around charge for remittance ditch 3 has cofferdam 14, avoids ring waste pollution Soil Surrounding and underground water in treatment process；
Then heelpiece 2 is set on the ground；Heelpiece 2 is accumulated to be formed using sandstone or soil containing cyanogen in hillside shape, two sides
Form gentle slope symmetrical and that angle is 6 ° between slope and horizontal plane；One layer of PVC antiseepage is equipped in the upper surface of heelpiece 2
Film makes to deposit to the water on 2 surface of heelpiece and penetrate into heelpiece 2；
Along row's ozone of the slope surface heave direction parallel arrangement of heelpiece 2 on the top surface for the heelpiece 2 for being covered with PVC antiseepage film
Aeration tube 13, the spacing between adjacent ozonation aerated pipe 13 are 10~20mm；The length of every ozonation aerated pipe 13 and build heap bottom
The length in face is consistent, and one end port closed, uniformly offers the venthole that multiple apertures are 5mm thereon, makes its effective aperture
Rate reaches 30%；Soil to prevent leacheate and falling is blocked causes gas pump discharge too low at venthole, at every
The outer layer of ozonation aerated pipe 13 is coated with layer of non-woven fabric；
Soil containing cyanogen is deposited in the top of the ozonation aerated pipe 13 set in a row, specifically, according to half industry of geology bureau
Test requirements document, it is 200m that build heap scale, which be total volume,3, it is highly 1.5m, base area is 45 × 45m, the ladder that angle of repose is 40 °
Shape mesa-shaped builds heap 1, and the top surface that the trapezoidal mesa-shaped builds heap 1 is laid in plane；
By the more elution pipes 12 equipped with aperture, successively parallel arrangement is in a row on building 1 top surface of heap, and adjacent elution is managed
Spacing between 12 is 10~20mm；Wherein, every elution pipe 12 is consistent with the length for building heap top surface for length, and one end port
Closing uniformly offers the apopore that multiple apertures are 5mm thereon, its effective percent opening is made to reach 30%；
(2) installation ozone oxidation removes cyanogen system:
Ozone generator 4 connect with the inlet end of blower 5 and is formed connection, the outlet side of blower 5 by an appendix
By supervisor's II connection with ten branched pipes, and nine branched pipes therein then with nine ozonation aerated pipes 13 into
Gas end connects one to one and forms connection；
(3) installation elution removes cyanogen system:
Elution flow container 7 connect with the liquid feeding end of centrifugal pump 11 by a perfusion tube and forms connection；Centrifugal pump 11 goes out
Liquid end connect one by one and is formed connection by the liquid feeding end that a supervisor I with four branched pipes elutes pipe 12 with four, uses
In by leacheate by be responsible for I be delivered in each elution pipe 12；The volume for eluting flow container 7 is 100m3, top be equipped with it is multiple into
Liquid mouth；NaOH dosing tank 9, CH3The top of elution flow container 7 is arranged in COOH dosing tank 10, and goes out liquid by being connected to dosing tank
Perfusion tube between end and elution 7 inlet of flow container is connected to the elution formation of flow container 7；Ozone snorkel 6 is vertically arranged in elution
In flow container 7, it is connect with the remaining branched pipe of supervisor II with the snorkel being arranged in elution flow container 7 and forms connection；Leaching
Washing lotion tank 7, which is also formed by the ring waste delivery pipe and charge for remittance ditch that are arranged between its inlet and charge for remittance ditch outlet end, to be connected
It is logical；A snorkel is also vertically arranged in elution flow container 7.PH meter is additionally provided in elution flow container 7, for examining in real time
Survey the pH value of leacheate.Wherein, ozone oxidation is except the supervisor I for having branched pipe in cyanogen system, and elution in cyanogen system except having
Supervisor II, ring waste delivery pipe, leacheate delivery pipe and three perfusion tubes of branched pipe are all made of pvc pipe, and each defeated
It send and is provided with flowmeter and flow pump on pipeline；Each flowmeter, each flow pump are all made of PLC control, according to the actual situation to
The solid component of the mixed gas containing ozone or leacheate is filled into elution flow container 7；Bottom is built in heap according to spray waste liquid simultaneously
The deposition adjustment ring waste in portion is sent into elution flow container 7 and leacheate is delivered to the flow of spray tube 12 again.
Embodiment:
The processing system in the embodiment is used to carry out except cyanide somewhere concentration of cyanide for the original soil of 93mg/kg
Soil remediation processing, eluting and being loaded with that use concentration be 80mmol/L NaOH and concentration in tank is 30mmol/L CH3COONa
1:1 mixed preparing leacheate (pH 10.5) by volume, with 60L/m2Elution intensity drop leaching to the soil surface of h makes it
It penetrates into soil containing cyanogen from top to bottom, while the ozone/air Mixture for being 50mg/L by ozone concentration using ozone generator
It is passed through soil from bottom to top from glass tube bottom end；Wherein, the gas flow that ozone is passed through is 250L/h.
Meanwhile comparative test has been carried out for the experiment, using the cyanide of publication CN201621328300.3
The processing system of contaminated soil carries out individual spray process to identical soil containing cyanide, and elution intensity is similarly 60L/m2·
h。
The soil in two groups of experimentations under different moments is gone to carry out cyaniding analyte detection and record, until cyanide in soil
Concentration meet the requirement of qualified discharge.Wherein, it is inscribed in each experiment, soil pattern detected is three different depths
The soil of position, then will test that results are averaged, obtain the concentration of cyanide result in corresponding soil.Specific experiment knot
Fruit see the table below 1.
Table 1:
As can be known from Table 1, soil containing cyanogen is handled by the way of single elution, the concentration warp of cyanide in original soil
It crosses after the elution of 1960min (about 32h) and is down to 9.78mg/kg from 93mg/kg, the total amount of the cyanide leached in leacheate is
41.74mg；And elution+ozone oxidation collaboration processing mode is used to handle identical soil containing cyanogen, cyanide in original soil
Concentration is down to 9.78mg/kg from 93mg/kg after elution-oxidation processes of 1520min (25h), and leached in leacheate
The total amount of cyanide is 24.07mg；As it can be seen that realizing soil qualified discharge using the elution+ozone oxidation collaboration processing mode
The processing time has obtained substantially shortening compared to the mode of single elution, and the amount for leaching cyanide simultaneously is greatly decreased, and realizes
The cyanide for effectively removing 42% effectively improves the treatment effeciency of cyanide in soil, mitigates the difficulty of subsequent processing.It can be seen that should
Processing system can effectively realize the processing carried out to soil containing cyanide except cyanide.
Claims (7)
1. a kind of dump leaching-ozone cooperative decyanation processing system, which is characterized in that remove cyanogen system including mound system, ozone oxidation
Cyanogen system is removed with elution；Wherein,
The mound system includes charge for remittance ditch (3), the cofferdam (14) for surrounding charge for remittance ditch (3) and being disposed there above on ground, is in
The heelpiece (2) and trapezoidal mesa-shaped that shape accumulation in hillside is laid on the ground of cofferdam (14) inside are deposited in containing above heelpiece (2)
Cyanogen soil builds heap (1)；It along the circumferential direction offers and a plurality of is connected to charge for remittance ditch (3) formation on the ground of neighbouring cofferdam (14)
Fluid passage；
The elution is except the more elution pipe that cyanogen system includes that an at least row is successively parallel on building heap (1) top surface and is intervally arranged
(12), and the elution flow container (7) with agitating device, centrifugal pump (11), the NaOH of the mound system neighbour side are set add
Medicine-chest (9), CH3The ozone snorkel (6) of COOH dosing tank (10) and setting in elution flow container (7)；Wherein, NaOH dosing
Case (9) and CH3COOH dosing tank (10) is connected in elution flow container (7) by liquor charging pipeline respectively；It elutes flow container (7) and passes through one
Root perfusion tube connect with the liquid feeding end of centrifugal pump (11) and forms connection；The outlet end of centrifugal pump (11) has more by one
The supervisor I of branched pipe connect one by one with the liquid feeding end of more elution pipes (12) and forms connection；It elutes flow container (7) and also passes through one
Leacheate waste liquid delivery pipe connect with charge for remittance ditch and forms connection；The ozone oxidation except cyanogen system include ozone generator (4),
Blower (5) and the more ozonation aerated pipes of an at least row successively arranged along the slope surface heave direction parallel interval of heelpiece (2)
(13)；Ozone generator (4) connect with the inlet end of blower (5) and is formed connection, the outlet of blower (5) by an appendix
End is by the inlet end of a supervisor II with more branched pipes and more ozonation aerated pipes (13) and is arranged in leacheate
Ozone snorkel (6) in tank (7) connects one by one and forms connection.
2. dump leaching according to claim 1-ozone cooperative decyanation processing system, which is characterized in that heelpiece (2) uses sandstone
Or soil containing cyanogen is accumulated to be formed, and its upper surface is equipped with one layer of HDPE or PVC antiseepage film.
3. dump leaching according to claim 1-ozone cooperative decyanation processing system, which is characterized in that be provided with every ozone
The percent opening of venthole on aeration tube (13) is 30~40%, and the opening diameter of venthole is 1~5mm.
4. dump leaching according to claim 1-ozone cooperative decyanation processing system, which is characterized in that be provided with every elution
The percent opening for managing the apopore on (12) is 30~40%, and the opening diameter of apopore is 1~5mm.
5. dump leaching according to claim 1-ozone cooperative decyanation processing system, which is characterized in that ozonation aerated at every
The outer layer of pipe (13) is also wrapped on layer of non-woven fabric.
6. dump leaching according to claim 1-ozone cooperative decyanation processing system, which is characterized in that heelpiece (2) is formed by
Angle is 5~8 ° between slope and horizontal direction.
7. dump leaching according to claim 1-ozone cooperative decyanation processing system, which is characterized in that the height for building heap (1) is
1.5~4m, angle of repose are 35~40 °.
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