CN109970257A - A kind of groundwater remediation circulation well device - Google Patents
A kind of groundwater remediation circulation well device Download PDFInfo
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- CN109970257A CN109970257A CN201910156635.3A CN201910156635A CN109970257A CN 109970257 A CN109970257 A CN 109970257A CN 201910156635 A CN201910156635 A CN 201910156635A CN 109970257 A CN109970257 A CN 109970257A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Soil Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Groundwater remediation circulation well device according to the present invention, including photocatalytic reaction unit, in the water located underground of one end, other end side waterborne located underground；And vacuum extraction unit, including exhaust tube, activated carbon adsorption mechanism, one end of exhaust tube is connected with activated carbon adsorption mechanism, the top of groundwater level is arranged in the other end, wherein, upper layer screen casing and lower layer's screen casing are respectively arranged on the borehole wall, photocatalytic reaction unit includes bracket, multiple light-catalyzed reaction screen components, multiple visible light sources, multiple light-catalyzed reaction components are arranged in parallel on bracket respectively, multiple light sources are separately positioned in multiple light-catalyzed reaction components, photocatalytic coating is provided in light-catalyzed reaction component, photochemical catalyst is reacted under visible light source irradiation, Organic Chemicals In Groundwater is removed and heavy metal contaminants are repaired, treated, and underground water increases under the suction function that vacuum extraction unit generates, it is flowed back into stratum by the outflow of upper layer screen casing.
Description
Technical field
The invention belongs to environment protection fields, and in particular to a kind of groundwater remediation circulation well device.
Background technique
Groundwater remediation technology is broadly divided into in-situ immobilization and showering two major classes, and based technique for in-situ remediation is to environmental disturbances
It is less, it does not need to extract out underground water, cost is relatively low, is more paid close attention to and is applied.
Circulation well technology is chiefly used in removing volatility, semi-volatile organic matter in underground water at present, however for removably
Being lauched middle macromolecular organic pollutant and repairing heavy metal pollution object space face, there are certain difficulties.
Photocatalysis technology can effectively remove the larger molecular organics in water, be decomposed into CO2、H2O and small-molecule substance are
A kind of green, efficient, without secondary pollution high-level oxidation technology, meanwhile, photocatalysis technology can also effectively remediating heavy metal dirt
Contaminate object.Therefore, exploitation photocatalysis circulation well technology can more preferably, more efficiently remove the pollutant in underground water.
There are also patents before is used for groundwater remediation for photocatalysis apparatus, but is all the reaction condition in ultraviolet lamp
Under, largely use TiO2Photochemical catalyst, reaction condition, reaction unit and the equal different from of reaction media.It is specific visible:
103112915 A of patent CN discloses a kind of circulation well method and apparatus for removing pollutant in underground water, this is specially
In benefit by being aerated underground water in well, stripping, extracting, the techniques such as agent-feeding treatment carry out the processing of contaminant water, heavy metal
Removal is then using the method for electrolysis.The important technical of dosing patent thus, needs according to pollution level and pollutant not
Together, at the high pressure admission mouth of aeration or oxidation reinforced dose of dedicated chemical feed pipe, microorganism formulation, ozone and flocculant.With light
When catalysis system is combined, using titanium dioxide as photochemical catalyst, using annular ultraviolet lamp tube, addition Fenton reagent conduct is also needed
Oxidant.
203419800 U of patent CN discloses a kind of photochemical catalytic oxidation groundwater remediation system, and underground water is evacuated to through well
Ground respectively by being coated with the ultraviolet catalytic reactor and absorbent charcoal adsorption tank of titanium dioxide optical catalyst, then refills
Underground water.It can be with the organic pollutant of oxidative degradation, in addition, addition Fenton reagent is as oxidant in underground water to remove.
105692919 B of patent CN discloses a kind of TiO2Carbon tetrachloride device and its work in photocatalytic degradation underground water
Make method, this patent includes water inlet pipe, ultraviolet catalytic reaction tank, aerator, sludge pipe, scum pipe, drainpipe, control system
System；Underground water containing carbon tetrachloride is delivered in light-catalyzed reaction pond by water inlet pipe on the left of light-catalyzed reaction pond, control system
Control aerator delivers the air in light-catalyzed reaction pond, with two in light-catalyzed reaction pond after air and underground water mixing
Titania photocatalyst reacts, and the clean water generated after reaction is discharged from drainpipe, and the dross generated in reaction is from deslagging
Pipe is discharged, and the sediments such as silt in underground water are discharged from sludge pipe.This patent is to be urged using ultraviolet light by light of titanium dioxide
Agent removes the carbon tetrachloride in underground water.
206997339 U of patent CN discloses a kind of circulation for soil and underground water heavy metal pollution in-situ immobilization
Well device, including circulation well, leacheate add-on system and groundwater circle system；It is equipped with sealed well lid at the top of circulation well, follows
Ring well includes circulation well upper section and circulation well lower section, is separated between circulation well upper section and circulation well lower section with partition, two sections of boreholes wall
On be respectively equipped with upper layer screen casing and lower layer's screen casing；Leacheate add-on system include leacheate storage bin, leacheate sprinkling pipe network with
And leacheate adding tube；Groundwater circle system includes immersible pump, groundwater mining pipe, underground water heavy metals removal facility, returns
Water injecting pump and groundwater recharge pipe；The mixability for increasing elution medicament and contaminated soil and underground water improves a huge sum of money
Belong to elution, remediation efficiency, enhances repairing effect.This patent pertains only to a kind of ground water circulation well, by the way that leacheate is added
Means remove pollutant in underground water.
106238059 A of patent CN discloses a kind of composite photo-catalyst, preparation method, water for removing arsenic from underwater
Purification method and system.This patent is catalyst using titanium dioxide, ultraviolet light is light source, first by ground by photocatalysis method
Trivalent arsenic in being lauched is oxidized to pentavalent arsenic, passes through the means removal of absorption later.
Summary of the invention
Removal micro quantity organic pollutant or accessible pollution are only capable of for some schemes in the prior art are that may be present
Object it is relatively simple be only capable of removably descending organic pollutants or to heavy metal contaminants almost without repairing effect or
Various oxidants need to be added in application to promote the progress of reaction and using a large amount of the problem of eluting medicament, the present invention provides
A kind of photocatalysis circulation well prosthetic device in situ for organic pollutant and heavy metal pollution underground water.
The difference of the present invention and other patents are that the prior art needs in addition to add chemical agent, such as Fenton reagent, or
It is that could remove other pollutants simultaneously using the methods of electrolysis simultaneously, not only increases use cost and increase reparation work
The complexity of skill, in addition, a large amount of additions of medicament also have the possibility for causing secondary pollution.
The present invention is to be reacted under visible light conditions using photochemical catalyst, while removing organic contamination in underground water
A kind of based technique for in-situ remediation of object and repairing heavy metal pollution object.
The present invention provides a kind of groundwater remediation circulation well devices, have the feature that, including light-catalyzed reaction list
Member is connect with the borehole wall of circulation well, in the water located underground of one end, other end side waterborne located underground；And vacuum extraction unit,
Including exhaust tube, activated carbon adsorption mechanism, one end of exhaust tube is connected with activated carbon adsorption mechanism, and the other end is arranged in underground
The top of the water surface, wherein be respectively arranged with upper layer screen casing and lower layer's screen casing on the borehole wall, photocatalytic reaction unit includes bracket, more
A light-catalyzed reaction screen component, multiple visible light sources, multiple light-catalyzed reaction components are arranged in parallel on bracket respectively, multiple
Light source is separately positioned in multiple light-catalyzed reaction components, and photocatalytic coating, photocatalysis are provided in light-catalyzed reaction component
Agent is reacted under visible light source irradiation, is removed to Organic Chemicals In Groundwater and is carried out to heavy metal contaminants
It repairs, treated, and underground water increases under the suction function that vacuum extraction unit generates, and is flowed back by the outflow of upper layer screen casing
In stratum.
In groundwater remediation circulation well device provided by the invention, it can also have the following features: wherein, lower screen
The bottom of pipe is higher than circulation well shaft bottom.
In addition, in groundwater remediation circulation well device provided by the invention, which is characterized in that it further include aeration unit,
For increasing the oxygen content of underground water, including aeration tube and be connected to aeration bottom of the tube aeration head, aeration head setting is following
In lower part underground water in ring well.
In addition, can also have the following features: wherein in groundwater remediation circulation well device provided by the invention,
Multiple light-catalyzed reaction screen components are set gradually in parallel up and down, and the quantity of light-catalyzed reaction screen component is 1-20.
In addition, can also have the following features: wherein in groundwater remediation circulation well device provided by the invention,
The spacing of two neighboring light-catalyzed reaction screen component is 5-100cm, light-catalyzed reaction screen component include about three it is parallel successively
The light-catalyzed reaction net of setting.
In addition, can also have the following features: wherein in groundwater remediation circulation well device provided by the invention,
Light-catalyzed reaction net is made of translucent material, and the grid of light-catalyzed reaction net is in honeycomb shape, two neighboring light-catalyzed reaction
The spacing of net is 0.8-3cm.
In addition, can also have the following features: wherein in groundwater remediation circulation well device provided by the invention,
Light-catalyzed reaction is provided with photocatalytic coating on the net, and photochemical catalyst is red phosphorus or titanium dioxide.
In addition, can also have the following features: wherein in groundwater remediation circulation well device provided by the invention,
Light source is rodlike visible light source.
In addition, can also have the following features: wherein in groundwater remediation circulation well device provided by the invention,
Multiple rodlike visible light sources are uniformly arranged on respectively in light-catalyzed reaction screen component.
In addition, can also have the following features: wherein in groundwater remediation circulation well device provided by the invention,
It is provided with PP cotton in upper layer screen casing and lower layer's screen casing, underground water is pre-processed by lower layer's screen casing, for removing underground water
In suspended matter and large particulate matter, upper sieve pipe is used for will treated that water flows back into stratum.
The action and effect of invention
Related groundwater remediation circulation well device according to the present invention, because of light-catalyzed reaction in photocatalytic reaction unit
It is provided with catalyst coat in component, is reacted by carrying out visible light photocatalysis with light source, therefore can remove in underground water
Macromolecular organic pollutant and repairing heavy metal pollution object.In addition aeration unit is used to increase the oxygen content of underground water, is conducive to
The progress of subsequent light-catalyzed reaction and the removal for being conducive to biodegradable pollutant.
The present invention can remove volatility in underground water, half volatile organic contaminant, removal macromolecular organic contamination simultaneously
Object and biodegradable pollutant, and the heavy metal contaminants in underground water can be repaired；It does not need in addition to add drug, to ring
Border interference is small, is a kind of cost-effective based technique for in-situ remediation.
Detailed description of the invention
Fig. 1 is groundwater remediation circulation well schematic device in the embodiment of the present invention one；
Fig. 2 is the schematic diagram of bracket in the embodiment of the present invention；
Fig. 3 is light-catalyzed reaction net schematic top plan view in the embodiment of the present invention；
Fig. 4 is groundwater remediation circulation well schematic device in the embodiment of the present invention two；And
Fig. 5 is groundwater remediation circulation process schematic diagram in the embodiment of the present invention two.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to be specifically addressed groundwater remediation circulation well device of the invention.
Embodiment one
Excavate circular loop well downwards from ground, groundwater remediation circulation well device is arranged in the circulation well of underground, uses
It is repaired in the underground water in circulation well.
As shown in Figure 1, groundwater remediation circulation well device includes photocatalytic reaction unit 15, aeration unit, vacuum extraction
Unit, the borehole wall 1, upper layer screen casing 2 and lower layer's screen casing 3.
The borehole wall 1 of circulation well uses integrated member, and concrete material, PVC material or HPDE material can be used and build up, and implements
In example, the borehole wall 1 is made of PVC material.It is sealing between the well lid and the borehole wall 1 of circulation well.
Upper layer screen casing 2 and lower layer's screen casing 3 are separately positioned on the borehole wall 1 of circulation well, upper layer screen casing 2 and lower layer's screen casing 3
Height is 40cm.The bottom of lower layer's screen casing 3 is higher than circulation well shaft bottom, and lower layer's screen casing 3 is higher than bottom 10cm.Upper layer screen casing 2
With PP cotton is provided in lower layer screen casing 3, underground water is pre-processed by lower layer's screen casing 3, outstanding in underground water for removing
Floating object and large particulate matter, underground water enters in circulation well after lower layer's screen casing 3 removes particulate matter, after a series of processing,
It is flowed back into stratum again finally by upper layer screen casing 2.
Photocatalytic reaction unit 15 is fixedly connected with circulation well, and in the water located underground of one end, the other end is located underground waterborne
Side.
Photocatalytic reaction unit 15 includes bracket 151 as shown in Figure 2, multiple light-catalyzed reaction screen components, multiple light sources
16 and multiple connectors 152.
Bracket 151 is in frame structure, has multiple vertical bars 1511, the top and bottom of multiple vertical bars pass through company respectively
Fitting 1512 is connected, and the shape of the frame structure is in the cylindrical shape to match with the borehole wall 1, in vertical bar 1511 respectively from up to
Multiple hooks 1513 are arranged with, link up with 1513 bill upward, bracket 151 is by connector 152 and the circulation borehole wall is fixed connects
Connect, in embodiment, connector 152 be hook, connector 152 with recycle the borehole wall 1 be fixedly connected and bill upward, bracket 151
Upper attachment 1512 is hung on connector 152.
Multiple light-catalyzed reaction screen components set gradually up and down be arranged in parallel on bracket 151 respectively, light-catalyzed reaction net
The quantity of component is 1-20；The spacing of two neighboring light-catalyzed reaction screen component is 5-100cm.
Light-catalyzed reaction screen component includes about the three light-catalyzed reaction nets 17 set gradually in parallel, light-catalyzed reaction net
17 are made of translucent materials, and in poroid, the spacing of two neighboring light-catalyzed reaction net 17 is for the grid of light-catalyzed reaction net 17
0.8-3cm, light-catalyzed reaction net 17 with a thickness of 1-3cm.
The poroid grid setting of light-catalyzed reaction net 17 is on hook 1513, so that the hook 1513 in vertical bar 1511 divides
The poroid grid of light-catalyzed reaction net 17 is not caught on and fixes it.Photocatalytic coating is provided on light-catalyzed reaction net 17.
In embodiment, the quantity of light-catalyzed reaction screen component is 3；The spacing of two neighboring light-catalyzed reaction screen component is
20cm, the spacing of two neighboring light-catalyzed reaction net 17 are 2cm.Light-catalyzed reaction net 17 is made of quartz or glass material,
Shape is in the circle to match with the borehole wall, and grid is in honeycomb shape, and the spacing of 1511 upper hook 1513 of vertical bar is according to two light
The spacing of catalysis reaction net 17 is correspondingly configured.
Multiple light sources are separately positioned in the grid of multiple light-catalyzed reaction nets 17, and light source 16 is visible light source.Implement
In example, light source is rodlike visible light source.External power supply is connect with rodlike visible light source for powering, rodlike visible light source
Connecting with electric wire place has the function of waterproof sealing, and is higher than the water surface.
Multiple rodlike visible light sources 16 pass vertically through the grid of light-catalyzed reaction net 17 respectively, are evenly distributed on photocatalysis
It reacts on net 17, the top of rodlike visible light source 16 is clamped by clip, and clip is connected with the vertical bar 1511 on bracket 151,
In embodiment, the quantity of rodlike visible light source 16 is 3, is arranged on the side of the circumference of light-catalyzed reaction net 17.
In embodiment, the quantity of rodlike visible light source 16 is 3, and 3 rodlike visible light sources 16 pass through clip respectively
It is connect with bracket 151, test tube clamp can be used in clip, and rodlike visible light source 16 is clamped in one end, and the other end is connected with bracket 151.
Photochemical catalyst uses red phosphorus in embodiment.Phosphorus is the element being widely present in the earth's crust, and red phosphorus is nontoxic, cheap easy
, and forbidden bandwidth is relatively narrow, it can be to visible light-responded.It is preferable that business red phosphorus can be obtained photocatalysis effect after simple process
Small particle red phosphorus, can be used for degrading organic pollutants and repairing heavy metal pollution object, such as Cr6+.In addition, red phosphorus photocatalysis
The light-catalyzed reaction that agent carries out is without in addition addition medicament.
Photochemical catalyst can also use TiO2(titanium dioxide) photochemical catalyst.
The response area of photocatalytic reaction unit is larger, and nanometer red phosphorus photochemical catalyst is uniformly smeared on light-catalyzed reaction net 17
Coating is arranged three visible light sources and irradiates light-catalyzed reaction net 17, altogether to guarantee that all places can be irradiated by light source.
The height of photocatalytic reaction unit 15 is generally determined according to groundwater level and circulation well height.
Aeration unit includes aeration tube 4, aeration head 5 and aspiration pump 6.
Aspiration pump 6 is arranged on the ground.
Aeration head 5 is arranged in the underground water in circulation well, in embodiment, aeration head 5 away from circulation bottom 30cm,
One end of aeration tube 4 is connected with aspiration pump 6, and the other end is connected with aeration head 5, and aeration tube 4 is located at photocatalysis
By reaction member.
When aeration unit is arranged, the corresponding position of well lid and multiple light-catalyzed reaction nets 17, which is provided with, allows aeration tube 4
By through-hole.
Aeration unit is sufficiently aerated underground water, for increasing the oxygen content of underground water, enables subsequent light-catalyzed reaction
It goes on smoothly.In embodiment, gas supply flow is 5L-30m when aeration3/min。
Vacuum extraction unit includes exhaust tube 10, valve 11, pressure vacuum gauge 12, charcoal canister 13, aspiration pump 14.
One end of exhaust tube 10 is connected with charcoal canister 13, and the top of groundwater level is arranged in the other end, and valve 11 is set
It sets on exhaust tube 10.Pressure vacuum gauge 12 is arranged on charcoal canister 13, and aspiration pump 14 passes through pipeline and 13 phase of charcoal canister
Connection.In order to avoid the interference to environment, charcoal canister 13 is arranged in subsurface.If the volume of charcoal canister 13 is little,
On the ground, in embodiment, charcoal canister 13, aspiration pump 14 are respectively provided on the ground for setting.
Volatility and half volatile organic contaminant eventually pass through vacuum extraction unit and are handled, and open valve 11 and take out
After air pump 14, the gas that stripping generates is after exhaust tube 10 is by charcoal canister 13, and pollutant is by the activity in charcoal canister 13
It is discharged after charcoal Adsorption.
The negative pressure that the pumping of aspiration pump 14 generates rises the underground water after repairing, and underground water is flowed into from lower layer's screen casing 3,
Underground water is flowed out by upper layer screen casing 2 after rising, is so recycled, and groundwater remediation circulation well device repairs underground water.
In embodiment, for vacuum degree control between 0-0.6Mpa, 13 volume of charcoal canister is generally 10-2000L aspiration pump
Flow 5L-30m3/ min,
In embodiment, the preparation method of red phosphorus, comprising the following steps:
Business red phosphorus after 200 DEG C of hydro-thermal process 12h ball milling 12h or is in water ultrasonically treated under inert gas conditions
4h obtains the red phosphorus of nano-scale after washing.
A kind of groundwater remediation circulation process are as follows:
Light-catalyzed reaction screen component, light source are installed on bracket, and bracket is fixed by connector and the circulation borehole wall
Connection；It is arranged in one end water located underground of light-catalyzed reaction net unit, other end side waterborne located underground, and powers on；
It is connected to aeration head and aspiration pump by aeration tube, the underground water away from circulation bottom 30cm is arranged in aeration head
In, and power on；
Exhaust tube, valve, pressure vacuum gauge, charcoal canister, aspiration pump are installed, one end of exhaust tube is connected with charcoal canister
Logical, the top of groundwater level is arranged in the other end, and valve is arranged on exhaust tube, and pressure vacuum gauge is arranged on charcoal canister,
Aspiration pump is connected by pipeline with charcoal canister, and is powered on；
Underground water is pre-processed by lower layer's screen casing, laggard for removing suspended matter in underground water and large particulate matter
Enter in circulation well；
Aeration head is sufficiently aerated underground water, for increasing the oxygen content of underground water；
Volatility and half volatile organic contaminant eventually pass through exhaust tube and enter charcoal canister, and pollutant is by charcoal canister
In activated carbon adsorption removal after be discharged；
Underground water carries out visible light photocatalysis reaction after contacting with the light-catalyzed reaction net for being coated with red phosphorus photochemical catalyst, obtains
To the underground water of macromolecular organic pollutant and repairing heavy metal pollution object in removal underground water；
It is flowed back into stratum again after the filtering that the underground water passes through upper layer screen casing.
Embodiment two
Groundwater extraction unit is increased in the present embodiment, other structures are the same as example 1.
As shown in figure 4, groundwater extraction unit includes immersible pump 7, drinking-water pipe 8, spray head 9 and connection frame.
Connection frame (being not drawn into figure) is fixedly connected with the borehole wall 1, positioned at the top of photocatalytic reaction unit 15.Embodiment
In, connection frame is to be detachably fixed to connect with the borehole wall.
One end of drinking-water pipe 8 is connected with spray head 9, and the other end is connected with immersible pump 7.
Spray head 9 is connected with the top connection frame of drinking-water pipe 8, and is located at the top of photocatalytic reaction unit 15.
In embodiment, immersible pump 7 is connected away from circulation bottom about 15cm, immersible pump 7 with external power supply.
Underground water is after the extracting of immersible pump 7, by drinking-water pipe 8, sprays stripping by spray head 9, is waved with removing in underground water
Hair property and half volatile organic contaminant.
Meanwhile being uniformly sprayed on the light-catalyzed reaction net 17 for being coated with red phosphorus photochemical catalyst through spray head 9, it carries out visible
Light light-catalyzed reaction removes macromolecular organic pollutant and heavy metal contaminants in underground water.
In embodiment, the range of flow of immersible pump 7 is 5L-10m when stripping3/h。
When underground water extraction unit is arranged, the corresponding position of well lid and multiple light-catalyzed reaction nets 17, which is provided with, allows pumping
The through-hole that water pipe 8 passes through.
As shown in figure 5, a kind of groundwater remediation circulation process are as follows:
Upper layer screen casing and lower layer's screen casing are provided on the circulation borehole wall；
Light-catalyzed reaction screen component, light source are installed on bracket, and bracket is fixed by connector and the circulation borehole wall
Connection；It is arranged in one end water located underground of light-catalyzed reaction net unit, other end side waterborne located underground, and powers on；
It is connected to immersible pump, spray head by drinking-water pipe, by being installed on connection frame for the top of spray head and drinking-water pipe, and
Connection frame is fixedly connected with the circulation borehole wall；Immersible pump is arranged in the underground water away from circulation bottom 15cm, by spray head
The top of photocatalytic reaction unit is set, and is powered on；
It is connected to aeration head and aspiration pump by aeration tube, the underground water away from circulation bottom 30cm is arranged in aeration head
In, and power on；
Exhaust tube, valve, pressure vacuum gauge, charcoal canister, aspiration pump are installed, one end of exhaust tube is connected with charcoal canister
Logical, the top of groundwater level is arranged in the other end, and valve is arranged on exhaust tube, and pressure vacuum gauge is arranged on charcoal canister,
Aspiration pump is connected by pipeline with charcoal canister, and is powered on；
Underground water is pre-processed by lower layer's screen casing, laggard for removing suspended matter in underground water and large particulate matter
Enter in circulation well；
Aeration head is sufficiently aerated underground water, for increasing the oxygen content of underground water；
Underground water sprays stripping by spray head after immersible pump extracts, through drinking-water pipe, to remove volatility in underground water
And half volatile organic contaminant；
Volatility and half volatile organic contaminant eventually pass through exhaust tube and enter charcoal canister, and pollutant is by charcoal canister
In activated carbon adsorption removal after be discharged；
Underground water be uniformly sprayed to through spray head be coated with red phosphorus photochemical catalyst light-catalyzed reaction it is online, carry out visible light
Light-catalyzed reaction obtains the underground water of the macromolecular organic pollutant and heavy metal contaminants in removal underground water；
It is flowed back into stratum again after the filtering that the underground water passes through upper layer screen casing.
Demonstration example 1
One printing and dyeing mill, contaminated place, periphery, it is about 60mg/L that original place, which is lauched middle crystal violet concentration,.Crystal violet belongs to big point
Sub- organic pollutant, it is more difficult to degrade.In pollution sources regional construction groundwater remediation circulation well device of the invention, while leaving
Monitoring well is had at 10 meters of circulation well, the crystal violet concentration at monitoring well is measured as 50.7mg/L.
Red phosphorus nanoparticle coating is applied on photocatalytic reaction device, the method according to the invention, underground water first leads to
Cross lower layer's screen casing filtering silt and suspended matter, after passing through a series of processing such as aeration, extracting, spray, light-catalyzed reaction later, warp
Upper layer screen casing refills water table.After circulation well is run 2 months, the crystal violet concentration at monitoring well is measured as 3.97mg/
L。
Demonstration example 2
Contaminated site detected the concentration 28.5mg/L of Cr VI, seriously by heavy metal pollution of hexa covalent chromium ion at one
It is exceeded.In pollution sources regional construction groundwater remediation circulation well device of the invention, while leaving 20 meters of photocatalysis-circulation well
Place has monitoring well, the concentration 18.5mg/L that detected Cr VI at monitoring well.
After using method operation processing 3-4 months in the present invention, Cr VI detected at final monitoring well
Concentration be reduced to 2.19mg/L.
The action and effect of embodiment
The groundwater remediation circulation well device according to involved in the present embodiment, because photocatalysis is anti-in photocatalytic reaction unit
It answers and is provided with catalyst coat in component, reacted by carrying out visible light photocatalysis with light source, therefore can remove in underground water
Macromolecular organic pollutant and heavy metal contaminants.In addition aeration unit is used to increase the oxygen content of underground water, after being conducive to
The progress of continuous light-catalyzed reaction,
The present embodiment can remove volatility in underground water, half volatile organic contaminant simultaneously, remove the organic dirt of macromolecular
It contaminates object and repairs the heavy metal contaminants in underground water；It does not need in addition to add drug, it is small to environmental disturbances, it is that a kind of economy has
The based technique for in-situ remediation of effect.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (10)
1. a kind of groundwater remediation circulation well device, is arranged in the circulation well of underground, for the underground in the circulation well
Water is repaired characterized by comprising
Photocatalytic reaction unit is connect with the borehole wall of the circulation well, and one end is located in the underground water, and the other end is located at described
Above underground water；And
Vacuum extraction unit, including exhaust tube, activated carbon adsorption mechanism, one end of the exhaust tube and the activated carbon adsorption machine
Structure is connected, and the top of the groundwater level is arranged in the other end,
Wherein, it is respectively arranged with upper layer screen casing and lower layer's screen casing on the borehole wall,
The photocatalytic reaction unit includes bracket, multiple light-catalyzed reaction screen components, multiple visible light sources,
Multiple light-catalyzed reaction components are arranged in parallel on the bracket respectively, and multiple light sources are separately positioned on multiple
In the light-catalyzed reaction component, it is provided with photocatalytic coating in the light-catalyzed reaction component,
The photochemical catalyst is reacted under visible light source irradiation, is removed simultaneously to Organic Chemicals In Groundwater
Heavy metal contaminants are repaired,
Treated, and underground water increases under the suction function that the vacuum extraction unit generates, and is flowed out by the upper layer screen casing
It flows back into stratum.
2. groundwater remediation circulation well device according to claim 1 characterized by comprising
Wherein, the bottom of lower layer's screen casing is higher than the circulation well shaft bottom.
3. groundwater remediation circulation well device according to claim 1, which is characterized in that further include:
Aeration unit, for increasing the oxygen content of the underground water, including aeration tube and be connected to aeration bottom of the tube aeration
Head, the aeration head are arranged in the lower part underground water in the circulation well.
4. groundwater remediation circulation well device according to claim 1, it is characterised in that:
Wherein, multiple light-catalyzed reaction screen components are set gradually in parallel up and down,
The quantity of the light-catalyzed reaction screen component is 1-20.
5. groundwater remediation circulation well device according to claim 4, it is characterised in that:
Wherein, the spacing of the two neighboring light-catalyzed reaction screen component is 5-100cm,
The light-catalyzed reaction screen component includes about the three light-catalyzed reaction nets set gradually in parallel.
6. groundwater remediation circulation well device according to claim 5, it is characterised in that:
Wherein, the light-catalyzed reaction net is made of translucent material, and the grid of the light-catalyzed reaction net is in honeycomb shape,
The spacing of the two neighboring light-catalyzed reaction net is 0.8-3cm.
7. groundwater remediation circulation well device according to claim 5, it is characterised in that:
Wherein, the light-catalyzed reaction is provided with photocatalytic coating on the net, and the photochemical catalyst is red phosphorus or titanium dioxide.
8. groundwater remediation circulation well device according to claim 1, it is characterised in that:
Wherein, the light source is rodlike visible light source.
9. groundwater remediation circulation well device according to claim 8, it is characterised in that:
Wherein, multiple rodlike visible light sources are uniformly arranged on respectively in the light-catalyzed reaction screen component.
10. groundwater remediation circulation well device according to claim 2, it is characterised in that:
Wherein, it is provided with PP cotton in the upper layer screen casing and lower layer's screen casing, the underground water passes through lower layer's screen casing
It is pre-processed, for removing suspended matter and large particulate matter in underground water,
The upper sieve pipe is for by treated, water to be flowed back into stratum.
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| CN113532940A (en) * | 2021-06-23 | 2021-10-22 | 成都理工大学 | Multifunctional test testing equipment for repairing heterogeneous soil groundwater |
| CN113636619A (en) * | 2021-09-05 | 2021-11-12 | 上海洁壤环保科技有限公司 | Distributed photocatalytic remediation system for remediation of organic matters in underground water |
| CN115093009A (en) * | 2022-01-24 | 2022-09-23 | 成都理工大学 | Photocatalysis microbial fuel cell treatment assembly for underground water circulating well |
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| CN115093009A (en) * | 2022-01-24 | 2022-09-23 | 成都理工大学 | Photocatalysis microbial fuel cell treatment assembly for underground water circulating well |
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Application publication date: 20190705 |