CN207013439U - A kind of system of repairing heavy metal in soil pollution - Google Patents
A kind of system of repairing heavy metal in soil pollution Download PDFInfo
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- CN207013439U CN207013439U CN201720938375.1U CN201720938375U CN207013439U CN 207013439 U CN207013439 U CN 207013439U CN 201720938375 U CN201720938375 U CN 201720938375U CN 207013439 U CN207013439 U CN 207013439U
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Abstract
A kind of system of repairing heavy metal in soil pollution is the utility model is related to, the system includes Soil leaching equipment, mixing tube, contact reactor and the catalyst tank being sequentially connected with；The catalyst tank top is respectively arranged with the first communication port and the second communication port with bottom；First communication port is connected by the outlet of the first valve and the second valve with the contact reactor and backwash drain pipe respectively；Second communication port is connected by the 3rd valve and the 4th valve with outlet pipe and backwash water inlet pipe respectively；The catalyst tank is internally provided with packing layer, and being filled with described filler layer has manganese bioxide coated spherical particle.The utility model can be greatly reduced with comprehensive disposable processing heavy metal pollution, part VOCs and other soil pollutions, intractability and technological process, and floor space greatly reduces, and operation is simpler, and removal pollutant scope is extremely wide, and removal effect is splendid.
Description
Technical field
Technical field of soil remediation is the utility model is related to, in particular to a kind of pollution of repairing heavy metal in soil
System.
Background technology
According in April, 2014 issue of State Ministry of Environmental Protection and Ministry of Land and Resources《National Investigation of Soil Pollution publication》It has been shown that,
National soil environment situation totally allows of no optimist, and some areas soil pollution is heavier, and arable soil environmental quality causes anxiety, industry and mining
Waste land environmental problem protrudes.Pollution type is based on inorganic, mainly including chromium, cadmium, mercury, arsenic, lead, copper, zinc, nickel etc..Soil
Earth pollution not only causes to seriously endanger to ecological environment, health, also counteracts that China's expanding economy.
The having a very wide distribution of soil pollution by heavy metal, contaminant capacity are big, and control expense is high, administer cycle length.Chemical leaching
Technology is a kind of effective technology for administering heavy metal pollution of soil, and it refers to by pollutant in soil environment can be promoted molten
The liquid of solution/migration or other fluids elute contaminated soil, make absorption or the pollutant being fixed on soil particle be desorbed,
The technology for dissolving and removing.The mechanism of action is combined in using leacheate or chemical assistant with the pollutant in soil, and is passed through
The chemical actions such as desorption, chelating, dissolving or the fixation of leacheate, reach the purpose of repairing polluted soil.
Although chemical leaching technology has been studied in Europe is considered a kind of heavy metal pollution that can be widely used
Soil restoring technology, but domestic research is almost blank, is stuck in the laboratory research stage substantially, seldom uses reality at present
In engineering.One of the reason for research hysteresis is the high cost of chemical leaching recovery technique.It is caused after chemical leaching largely to contain
Heavy metal leacheate needs further processing, and the processing of leacheate has intractability height, complex treatment process, processing cost
The problems such as height, poor processing effect, sludge quantity are excessive, repairing efficiency is long, thus solution therein still need to further research and
It is perfect.
In addition, one can be typically added in eluent in order to improve elution efficiency and save repair time during washed off soil
Can increase that heavy metal is water-soluble and the chemical assistant of migration a bit, most commonly acid and chelating agent, and the latter to soil just
Ground elution is more applicable, because their harm to environment are smaller.The main chemical reagent of washed off soil has EDTA, acid, weak acid
Salt etc..And heavy metal in soil species is typically relatively more, copper cadmium lead zinc chrome etc. all can be wherein.Water treatment field typically first uses
Oxidizing method carries out contact break, then alkaline chemical precipitation.Because in general soil remediation earth volume is very big, easily hundreds of thousands
All places up to a hundred, or even thousands of all places, the ratio of leacheate is usually 8 times of earth volume or so, so substantial amounts of heavy metal elution
Liquid either aoxidizes contact break or alkaline chemical precipitation will build contact break pond and sedimentation basin (a heavy pond, second pond), and input is substantial amounts of
Manpower, material resources, financial resources, construction period also lengthen significantly, unsuitable market application.
In view of this, it is special to propose the utility model.
Utility model content
The purpose of this utility model is to provide a kind of system and method for repairing heavy metal in soil pollution, above-mentioned to solve
Problem.
Specifically, a kind of system of repairing heavy metal in soil pollution is the utility model is related to, including the soil being sequentially connected with
Elute equipment, mixing tube, contact reactor and catalyst tank；
The catalyst tank top is respectively arranged with the first communication port and the second communication port with bottom；
First communication port passes through the outlet and backwash of the first valve and the second valve and the contact reactor respectively
Drain pipe is connected；
Second communication port is connected by the 3rd valve and the 4th valve with outlet pipe and backwash water inlet pipe respectively；
The catalyst tank is internally provided with packing layer, and being filled with described filler layer has manganese bioxide coated ball
Shape particle.
The utility model further relates to a kind of method of the repairing heavy metal in soil pollution based on system as described above, including：
After molysite, hypochlorite, heavy metal pollution of soil leacheate are reacted in the mixing tube, generation mixes
Conjunction solution enters in the catalyst tank in contact reactor after flocculation treatment carries out catalytic oxidation, is generated after reaction
Insoluble matter is deposited on packing layer, and the solution after purification flows out from the outlet pipe；
The insoluble matter is discharged after backwash by backwash outlet pipe.
The utility model is by the way that catalyst in molysite, hypochlorite reaction generation ferrate, and catalyst tank is mixed
It is used in the chemical leaching liquid processing of heavy metal pollution of soil reparation, principle is that oxidant and catalyst complex use, and is being urged
All pollutants such as all organic compounds, inorganic compound and hydrogen sulfide are oxidized away under agent effect, were finally passed through
Filter material material, which is filtered, to be got rid of.
Compared with prior art, the beneficial effects of the utility model are：
1), the specific system of process collocation provided in the utility model can remove 90%-99% pollution
Thing, removal pollutant scope is extremely wide, and removal effect is splendid；
2), the utility model can disposably handle all pollution problems with comprehensive, and intractability and technological process are significantly
Reduce, floor space greatly reduces, and operation is simpler；
3), used by the utility model catalyst can Reusability, processing cost can be greatly reduced in and regenerating easily；
4), the utility model reaction is acutely quick, and treatment effeciency is high, the soil remediation cycle is greatly shortened, after processing
Soil and water be stably reaching standard.
5), handle more thorough, be not heavy metals immobilization, but thorough place to go is fallen, and will not recur.Prior art is being repaired
Use curing process more during heavy metal pollution of soil, simply can't detect polluter, but it is actual also among soil, it is impossible to
Thoroughly solve, problem may reappeared in the near future.
6), the process operability is strong, treatment effect stabilizer pole, is not in that there may be times when bad situation.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the system of repairing heavy metal in soil provided by the utility model pollution；
Fig. 2 is a kind of modified configuration schematic diagram of the system of repairing heavy metal in soil provided by the utility model pollution.
Reference：
Mixing tube -1, contact reactor -2, catalyst tank -3, the first valve -301, the second valve -302, anti-eluate
Manage the -303, the 3rd valve -304, the 4th valve -305, outlet pipe -306, backwash water inlet pipe -307, packing layer -308, the first cloth
Hydrophone -309, the second water-locator -310, chemicals dosing plant -4.
Embodiment
The technical solution of the utility model is clearly and completely retouched below in conjunction with the drawings and specific embodiments
State, it will be appreciated by those skilled in the art that following described embodiment is the utility model part of the embodiment, without
It is whole embodiments, is merely to illustrate the utility model, and is not construed as limiting the scope of the utility model.Based on this practicality
Embodiment in new, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of the utility model protection.Unreceipted actual conditions person in embodiment, according to normal condition or manufacturer
It is recommended that condition carry out.Agents useful for same or the unreceipted production firm person of instrument, it is the routine that can be obtained by commercially available purchase
Product.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
As shown in figure 1, a kind of system of repairing heavy metal in soil pollution is the utility model is related to, including the soil being sequentially connected with
Earth elution equipment, mixing tube -1, contact reactor -2 and catalyst tank -3；
The top of catalyst tank -3 is respectively arranged with the first communication port and the second communication port with bottom；
First communication port passes through the first valve -301 and the second valve -302 and the contact reactor -2 respectively
Outlet and backwash drain pipe -303 are connected；
Second communication port is entered by the 3rd valve -304 and the 4th valve -305 with outlet pipe -306 and backwash respectively
Water pipe -307 is connected；
The catalyst tank -3 is internally provided with packing layer -308, and being filled with described filler layer -308 has titanium dioxide
The spherical particle of manganese coating.
Leached soil solutions are injected into mixing tube -1 by the Soil leaching equipment；
The Soil leaching equipment can use the conventional equipment for being used for repairing heavy metal in soil pollution in current technology, such as
It may include device and the equipment such as revolving drum heavy metal elution reactor, eluting column, filter or aerator.
Preferably, the system also includes backwash water tank, and the backwash water tank is connected with backwash water inlet pipe -307；More preferably
, soft water or running water are filled with the backwash water tank；
It is furthermore preferred that it is additionally provided with backwashing pump on the backwash water inlet pipe -307.
Preferably, the backwash drain pipe -303 is also associated with backwash effluent collection case.
After oxidant is sufficiently mixed contact in mixing tube -1 and with pollutant, filled into contact reactor -2
Point reaction, the hydroxyl radical free radical generated in course of reaction has a high oxidisability, organic pollution, big portion in pollutant
Metal ion (such as copper, nickel, lead, zinc, tin etc.), mud etc. is divided finally to be precipitated in the presence of the flocculant added, and from
Discharge the bottom of contact reactor -2；The clear liquid on upper strata enters in tank from the top of catalyst tank -3 to be filled with the catalyst in packing layer
Tap is touched, and carries out catalysis oxidation to unprecipitated lower valency metal ion in the presence of catalyst, and by reaction generation not
Molten thing intercepts filtering.These insoluble matters can wrap up it is all be oxidized after pollutants formed together precipitation by filtering intercept and deposit
In packing layer, all pollutions all can easily be filtered by filtering material and got rid of.And these deposits be easy to it is anti-by pure water
Flushing is got off, and according to the concentration and species of pollutant, setting is periodically backwashed to filtering material, and (backwashing period is generally
24-72 hours).And suggest regenerating once filtering material in every 6 months.
Filtering material back-flushing method step includes：
The first valve -301 and the 3rd valve -304 are first closed before being backwashed, opens the second valve -302, the 4th
The valve of valve -305 and backwash water tank；
Start backwashing pump, make backwash water with 20-25m/s flow velocity, 0.2-0.5MPa pressure is from backwash water inlet pipe -307
Enter tank body from filtering material tank base via water-locator water distribution uniformity, the water outlet at the top of the tank body of the water after backwash, from anti-
Wash out liquid pipe -303 and enter backwash effluent collection case, backwash time control was at 5~10 minutes.
Preferably, the system of repairing heavy metal in soil as described above pollution, the spherical particle be granularity 0.6mm~
1.4mm particle；More preferably granularity 0.8mm~1.2mm particle, 1.0mm can also be selected；
It is furthermore preferred that the interior nuclear composition of the spherical particle is mainly made up of zeolite and calcium hydroxide；It is furthermore preferred that the ball
Shape particle is mainly made up of following component：The parts by weight of zeolite 85~90, the parts by weight of manganese dioxide 9.5~15 and calcium hydroxide 0~5
Parts by weight；The more preferably parts by weight of zeolite 85, the parts by weight of manganese dioxide 10 and the parts by weight of calcium hydroxide 5.
In order to reach more preferable clean-up effect, the composition and physical property of filler are preferably as shown in Table 1 and Table 2.
The filler composition of table 1
| Mixture | Standard content | Specification |
| Natural zeolite | 85% | ＞ 85% |
| Manganese dioxide | 10% | ＞ 9.5% |
| Calcium hydroxide | 5% | ＜ 5% |
The filler physical property of table 2
The utility model used catalyst is i.e. renewable after water rinses, and operating cost is low, it is not necessary to regeneration and repeatedly more
Change.
Preferably, the system of repairing heavy metal in soil pollution as described above, the catalyst tank are 2 or more than 2；
As shown in Fig. 2 to expand treating capacity, treatment effeciency is improved, multiple catalyst tanks can be carried out in parallel, each catalysis
Outlet of the agent tank with the contact reactor is connected.
Preferably, the system of repairing heavy metal in soil pollution as described above, the volume of described filler layer account for the catalysis
The 60%~80% of the volume of agent tank.
Preferably, the system of repairing heavy metal in soil as described above pollution, the catalyst tank are internally provided with the
One water-locator -309, first water-locator -309 connect with first communication port.
First water-locator -309 of catalyst tank -3 may be such that heavy metal pollution of soil leacheate is evenly abundant with filler
Ground is contacted.
Preferably, the system of repairing heavy metal in soil as described above pollution, the catalyst tank are internally provided with the
Two water-locator -310, second water-locator -310 connect with second communication port.
Preferably, the system of repairing heavy metal in soil pollution as described above, the tank bottom of the catalyst tank -3 are provided with
Liquid discharging bucket, one end of the liquid discharging bucket connect with the tank bottom of the catalyst tank, the other end of the liquid discharging bucket and described second
Communication port is connected, and the cross-sectional area of the liquid discharging bucket is gradually subtracted from one end of the liquid discharging bucket to the other end of the liquid discharging bucket
It is small；
It is furthermore preferred that the liquid discharging bucket is detachably connected with the catalyst tank.
Preferably, the system of repairing heavy metal in soil as described above pollution, the system also include three chemicals dosing plants-
4, the chemicals dosing plant -4 includes dosing tank and dosing measuring pump；
The outlet of the chemicals dosing plant -4 and the mixing tube UNICOM；
The solution, hypochlorite solutions and flocculant of molysite are loaded with three chemicals dosing plants respectively, heavy metal-polluted soil is dirty
Dye leacheate adds from mixing tube.
A kind of method of the repairing heavy metal in soil pollution based on system as described above, including：
After molysite, hypochlorite, heavy metal pollution of soil leacheate are reacted in the mixing tube, generation mixes
Conjunction solution enters in the catalyst tank in contact reactor after flocculation treatment carries out catalytic oxidation, is generated after reaction
Insoluble matter is deposited on packing layer, and the solution after purification flows out from the outlet pipe；
The insoluble matter is discharged after backwash by backwash outlet pipe.
Molysite can generate ferrate ion in the basic conditions with hypochlorite.Ferrate ion is most strong oxidation
Agent, have the ability to get rid of inorganic impurity and organic impurities in the reaction of short several seconds.Ferrate will generate iron ion and
Oxygen molecule.The oxidation-reduction reaction is most violent reaction, and because itself does not have any byproduct in whole reaction
Generate and there is special meaning in whole water treatment field.After the completion of all organic matters include inorganic matter oxidation, finally
Remaining only ferric ion.
Preferably, into solution ph >=6 of progress catalytic oxidation in the catalyst tank；More preferably 6~10,
7~8 can also be selected.
Preferably, the molysite is iron oxide or Fe (NO3)3；
The composition of oxidant is 3 kinds, and they are single solid particles and powder, and respectively molysite particle is (preferably solid
Body hydrous iron oxide particle or Fe (NO3)3), solid hypochlorite powder and solid flocculant powder, preferably three kinds of medicaments it is mutual
Between the mass ratio that adds be (0.8~1.2):(1.6~2.4):(0.8~1.2), more preferably 1:2:1, i.e., respectively 1ml/t,
2ml/t, 1ml/t (three kinds of drug concentrations are 3~8wt%, preferably 5wt%)；
It is furthermore preferred that if pollutant concentration is x mg/l in heavy metal pollution of soil leacheate, in accessing pending water per ton
The molysite, hypochlorite, the cumulative volume of solution of flocculant of addition are x ± 50%x mL；More preferably x ± 30%x
ML, or x mL.
The dosing simultaneously in pipeline of first two medicament, the third medicament (flocculant) are added in first two medicament and given up with eluting
Water adds after fully reacting 5 minutes, then enters contact reactor -2 jointly, the fully reaction (contact in contact reactor -2
The design of reactor -2 will ensure that medicament is no less than 5 minutes with the wastewater eluting haptoreaction time) enter catalyst tank -3 afterwards.
Preferably, method as described above, the flocculant are mainly made up of sodium salt, specifically preferably by following mass fraction
Composition composition：
20~28 parts of sodium chlorite, 18~24 parts of sodium metasilicate, 18~24 parts of sodium carboxymethylcellulose, 8~10 parts of sodium carbonate,
30~50 parts of 8~10 parts of sodium sulfite, 30~50 parts of chitin fiber and diatomite.
Flocculant and mixed solution can produce flocculation, while capture the inorganic sediment of cation, adsorpting anion and
All suspended particulate substances include some colloids etc..
Finally it should be noted that：Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should
Work as understanding：It can still modify to the technical scheme described in foregoing embodiments, either to which part or complete
Portion's technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality
The scope of new each embodiment technical scheme.
Claims (10)
- A kind of 1. system of repairing heavy metal in soil pollution, it is characterised in that including be sequentially connected with Soil leaching equipment, mixing Pipe, contact reactor and catalyst tank；The catalyst tank top is respectively arranged with the first communication port and the second communication port with bottom；First communication port passes through the outlet of the first valve and the second valve with the contact reactor and anti-eluate respectively Pipe is connected；Second communication port is connected by the 3rd valve and the 4th valve with outlet pipe and backwash water inlet pipe respectively；The catalyst tank is internally provided with packing layer, and being filled with described filler layer has manganese bioxide coated spherical Grain.
- 2. the system of repairing heavy metal in soil pollution according to claim 1, it is characterised in that the spherical particle is grain Spend 0.6mm~1.4mm particle.
- 3. the system of repairing heavy metal in soil pollution according to claim 1, it is characterised in that the catalyst tank is 2 It is individual or more than 2；Each catalyst tank is in parallel, and the outlet with the contact reactor is connected.
- 4. the system of the repairing heavy metal in soil pollution according to any one of claims 1 to 3, it is characterised in that described to fill out The volume of the bed of material accounts for the 60%~80% of the volume of the catalyst tank.
- 5. the system of repairing heavy metal in soil according to claim 1 pollution, it is characterised in that the catalyst tank it is interior Portion is provided with the first water-locator, and first water-locator connects with first communication port.
- 6. the system of repairing heavy metal in soil according to claim 1 pollution, it is characterised in that the catalyst tank it is interior Portion is provided with the second water-locator, and second water-locator connects with second communication port.
- 7. the system of repairing heavy metal in soil pollution according to claim 1, it is characterised in that the tank of the catalyst tank Bottom is provided with liquid discharging bucket, and one end of the liquid discharging bucket connects with the tank bottom of the catalyst tank, the other end of the liquid discharging bucket with Second communication port connection, and the cross-sectional area of the liquid discharging bucket is from one end of the liquid discharging bucket to the another of the liquid discharging bucket End is gradually reduced.
- 8. the system of repairing heavy metal in soil according to claim 7 pollution, it is characterised in that the liquid discharging bucket with it is described Catalyst tank is detachably connected.
- 9. the system of repairing heavy metal in soil pollution according to claim 1, it is characterised in that the equipment also includes three Individual chemicals dosing plant, the chemicals dosing plant include dosing tank and dosing measuring pump；The outlet of the chemicals dosing plant and the mixing tube UNICOM.
- 10. the system of repairing heavy metal in soil pollution according to claim 1, it is characterised in that the equipment also includes Backwash water tank, and the backwash water tank is connected with the backwash water inlet pipe；Backwashing pump is additionally provided with the backwash water inlet pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720938375.1U CN207013439U (en) | 2017-07-28 | 2017-07-28 | A kind of system of repairing heavy metal in soil pollution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720938375.1U CN207013439U (en) | 2017-07-28 | 2017-07-28 | A kind of system of repairing heavy metal in soil pollution |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107282618A (en) * | 2017-07-28 | 2017-10-24 | 科海思（北京）科技有限公司 | A kind of system and method for repairing heavy metal in soil pollution |
| CN110153169A (en) * | 2018-03-26 | 2019-08-23 | 张冀鄂 | A kind of heavy-metal contaminated soil prosthetic device and biological renovation method |
| CN111676023A (en) * | 2020-05-27 | 2020-09-18 | 永清环保股份有限公司 | Semi-wrapping stabilizing material and preparation method and use method thereof |
| CN112404115A (en) * | 2020-09-30 | 2021-02-26 | 南京格洛特环境工程股份有限公司 | Chemical oxidation soil remediation process and simulation test device |
-
2017
- 2017-07-28 CN CN201720938375.1U patent/CN207013439U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107282618A (en) * | 2017-07-28 | 2017-10-24 | 科海思（北京）科技有限公司 | A kind of system and method for repairing heavy metal in soil pollution |
| CN110153169A (en) * | 2018-03-26 | 2019-08-23 | 张冀鄂 | A kind of heavy-metal contaminated soil prosthetic device and biological renovation method |
| CN111676023A (en) * | 2020-05-27 | 2020-09-18 | 永清环保股份有限公司 | Semi-wrapping stabilizing material and preparation method and use method thereof |
| CN112404115A (en) * | 2020-09-30 | 2021-02-26 | 南京格洛特环境工程股份有限公司 | Chemical oxidation soil remediation process and simulation test device |
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