CN103864263A - Circulating well system for removing volatile organic compounds in underground water - Google Patents
Circulating well system for removing volatile organic compounds in underground water Download PDFInfo
- Publication number
- CN103864263A CN103864263A CN201410052490.XA CN201410052490A CN103864263A CN 103864263 A CN103864263 A CN 103864263A CN 201410052490 A CN201410052490 A CN 201410052490A CN 103864263 A CN103864263 A CN 103864263A
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- well
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- gas
- underground water
- volatile organic
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000012855 volatile organic compound Substances 0.000 title abstract 2
- 238000000605 extraction Methods 0.000 claims abstract description 57
- 238000005273 aeration Methods 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 239000002957 persistent organic pollutant Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 230000004087 circulation Effects 0.000 claims description 28
- 239000003814 drug Substances 0.000 claims description 23
- 239000002250 absorbent Substances 0.000 claims description 16
- 239000003610 charcoal Substances 0.000 claims description 16
- 239000002349 well water Substances 0.000 claims description 15
- 235000020681 well water Nutrition 0.000 claims description 15
- 230000002745 absorbent Effects 0.000 claims description 14
- 239000005416 organic matter Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 7
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 229920011532 unplasticized polyvinyl chloride Polymers 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000008439 repair process Effects 0.000 abstract description 4
- 239000003153 chemical reaction reagent Substances 0.000 abstract 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000003673 groundwater Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000356 contaminant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000000050 nutritive effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The invention relates to a circulating well system for removing volatile organic compounds in underground water, and aims at providing a circulating well system suitable for different soil types to solve the problems of hydraulic transmission energy loss and poor soil permeability and avoid airflow short circuit caused by overlarge injection pressure as well as improve the influence radius and achieve remarkable repair effect. The system comprises an outer well, an inner well, a gas injection system, a gas extraction system and a reagent spraying system, wherein the inner well is arranged in the outer well, the gas injection system is used for introducing gas into the water of the inner well for aeration, a part of the gas mingled with organic pollutants is extracted by the gas extraction system and then adsorbed by an active carbon adsorption device to be discharged, the other part of the gas enters the outer well, and the reagent spraying system is used for sprays reagent liquid into the outer well.
Description
Technical field
The present invention relates to belong to the based technique for in-situ remediation field of underground water and soil, particularly relate to a kind of for removing the circulation well system of underground water volatile organic matter.
Background technology
Along with the development of urbanization process, many chemical industry, agricultural chemicals enterprise start resettlement, and the soil and groundwater of resettlement Hou Yuan plant area has been subject to pollution in various degree, after needing to repair, could be used for commercial land, house or other construction.Pollutent in soil and groundwater particularly organic pollutant has that content is low, kind is many, refractory reason, endangers the features such as large.Wherein not only teratogenesis, carcinogenic, mutagenesis of many organic pollutants, can also enter into ambient atmosphere environment by volatilization, and people's healthy and orthobiosis in serious harm.
For the underground water reparation in volatility organic contamination place, widely used is AS(original position air aeration at present) technology.AS technology is directly injected air to the saturation zone of soil, and needed injection pressure must overcome the static pressure of decanting point underground water and the pressure of soil capillary, could form gas channel, and easily causes air flow shortcircuit.The repairing effect of AS technology also has very large relation with soil type, is not suitable for the place of soil permeability poor (as clay).
Summary of the invention
The technical problem to be solved in the present invention is to provide and is a kind ofly applicable to circulation well system from sand to clay soil type directly to injecting gas underground water, the loss of waterpower transmitting energy, the poor problem of soil permeability are effectively solved, avoid the phenomenon of the air flow shortcircuit causing because injection pressure is excessive, can effectively improve the radius of influence, the significant circulation well system of repairing effect simultaneously.
For reaching above-mentioned purpose, the present invention is a kind of for removing the circulation well system of underground water volatile organic matter, described system comprises outer well, interior well, gas injection system, gas extraction system and medicament sprinkling system, described interior well is placed in described outer well, described gas injection system is for passing into gas aeration to described interior well well water, after aeration, discharge through absorbent charcoal adsorber absorption after by the extracting of described gas extraction system doped with the described gas part of organic pollutants, another part enters described outer well, described medicament sprinkling system is for spraying liquid to described outer well.
On the wherein said interior well borehole wall, have upper strata screen casing and lower floor's screen casing, make water body circulation in described interior well and described outer well, screen casing bottom, described upper strata is lower than the well water water surface.
Near wherein said upper strata screen casing and described lower floor screen casing, fill gravel between described Nei Jing and outer well, between described upper strata screen casing and described lower floor screen casing, fill concrete is between described Nei Jing and outer well.
Wherein gas injection system comprises pneumatic pump, valve and aeration tube, and described aeration tube one end connects described pneumatic pump through described valve, and the other end inserts interior well and is placed in screen casing place of described lower floor.
Wherein said aeration tube head is provided with aeration head, for uniform aeration.
Wherein said gas extraction system comprises extraction pump, valve and extraction pipe, described absorbent charcoal adsorber is led to after being connected with described extraction pump by described valve in described extraction pipe one end, the other end inserts interior well and is placed on well water face, and described interior well well head sealing arranges.
Wherein said medicament sprinkling system comprises killer injecting pump, valve and medicine-pouring pipe, and described medicine-pouring pipe one end is connected with described killer injecting pump through described valve, and the other end inserts described outer well and is placed on well water face, and described outer well wellhead sealing arranges.
Wherein also comprise the medicament shower that is positioned at outer well, described medicament shower is connected and is placed on well water face with medicine spraying tube in described outer well.
Wherein also comprise near the gas extraction well system of described circulation well that is positioned at, described gas extraction well system comprises extraction well, extraction tube, extraction pump and absorbent charcoal adsorber, described extraction tube one end connects described extraction pump, the other end is placed in described extraction well, and described extraction pump connects described absorbent charcoal adsorber.
Wherein said interior well is UPVC pipe or stainless steel tube.
The present invention has compared with prior art obtained following technique effect:
The invention provides and be a kind ofly applicable to circulation well system from sand to clay soil type directly to injecting gas underground water, the loss of waterpower transmitting energy, the poor problem of soil permeability are effectively solved, avoid the phenomenon of the air flow shortcircuit causing because injection pressure is excessive, can effectively improve the radius of influence, the significant circulation well system of repairing effect simultaneously; Increase medicament sprinkling system, can strengthen the treatment effect of circulation well system; Bound gas extraction well system has realized the removal of soil saturation band and the organic contamination of unsaturation band volatility simultaneously.
Below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing explanation
Fig. 1 circulation well apparatus structure of the present invention schematic diagram;
The piping diagram of Fig. 2 medicament shower.
Description of reference numerals: 1-lower floor screen casing; 2-upper strata screen casing; 3-groundwater velocity instrument; 4-pneumatic pump; 5-aeration head; 6-absorbent charcoal adsorber; 7-pharmacy jar; 8-medicament shower; 9-aeration tube; 10-extraction pump; 11-killer injecting pump; The outer well of 12-; Well in 13-; 14-valve; 15-valve; 16-valve; 17-medicine-pouring pipe; 18-concrete; 19-gravel; 20-extraction pipe; 21-gas extraction well; 22-extraction pump; 23-absorbent charcoal adsorber; 24-unsaturation band; 25-ground water table; 26-saturation zone.
Embodiment
Below in conjunction with drawings and Examples, technical characterictic and the advantage with other above-mentioned to the present invention are described in more detail.
As shown in Figure 1, beat the outer well 12 of a bite, make the shaft bottom of outer well 12 be positioned at organism reparation saturation zone to be repaired, afterwards the interior well 13 of stainless steel is placed in to outer well 12, interior well 13 shaft bottoms are a little more than outer well 12 shaft bottoms, interior well 13 bottom sealings, it is around lower floor's screen casing 1, it is lower floor's screen casing 2 that top is positioned at organism reparation unsaturation band place, lower floor's screen casing 2 bottoms are not less than the well water water surface, upper strata screen casing 2 and lower floor's screen casing 1 are set and make interior well 13 and outer well 12 well water circulations, upper strata screen casing 2 and lower floor's screen casing 1 side are filled in (being that in keeping, well 13 circulates with the well water of outer well 12 without the object of concrete 18) between interior well 13 and outer well 12 with gravel 19, between upper strata screen casing 2 and lower floor's screen casing 1, be filled between interior well 13 and outer well 12 with concrete 18, to realize the fixing of interior well 13.Aeration tube 9 one end of gas injection system connect pneumatic pump 4 through valve 14, and the other end is with aeration head 5, and aeration head 5 inserts interior well 13 and is placed in screen casing 1 place of described lower floor, absorbent charcoal adsorber 6 is led to after being connected with extraction pump 10 by valve 15 in extraction pipe 20 one end of gas extraction system, the other end inserts interior well 13 and is placed on well water face, interior well 13 well head sealings are arranged, medicine-pouring pipe 17 one end of medicament sprinkling system are connected with 11 killer injecting pumps through valve 16, the other end is provided with medicament shower 8, medicament shower 8 inserts outer well 12 and is placed on well water face, outer well 12 wellhead sealing settings, a bite or many implications body extraction well system are set apart from described circulation well system 3～10m place, described gas extraction well system extraction tube one end connects extraction pump 22, the other end is placed in extraction well 21, extraction pump 22 connects absorbent charcoal adsorber 23.
While using this system to repair, open valve 14, inject the mixed gas of air or ozone and air to lower floor's screen casing 1 place of aeration tube 9 by pneumatic pump 4, the interior aeration tube 9 of interior well 13 and aeration head 5, in well, produce a large amount of bubbles, cause the ground water table in the interior underground water density reduction of lower floor's screen casing 1 place's well and upper strata screen casing 2 place's wells to raise; The underground water at lower floor's screen casing 1 place enters in well by lower floor's screen casing 1, and the underground water that is rich in gas flows out outside well by upper strata screen casing 2, and bubble is at the interior formation upstream of interior well 13, and in uphill process, the pollutent in underground water is caught or is oxidized; Control the rate of injection of pneumatic pump 4 at 55～105m
3/ h.
The underground water that is rich in gas is realized gas-liquid separator at upper strata screen casing 2 places, and a part of gas is collected and processed by extraction pump 10 and through absorbent charcoal adsorber 6, and another part gas permeation upper strata screen casing 2 and gravel 19 enter soil unsaturation band 24.
When injecting gas, open valve 15, use extraction pump 10 with 1.6～2.5m
3the extracting speed of/h is collected being rich in the organic mixed gas evaporating, and gas enters after absorbent charcoal adsorber 6 purifies and discharges through extraction pipe 20, regularly the gac in absorbent charcoal adsorber 6 is changed.
System operation is stable after 24 hours, measures the flow velocity u of the circulating groundwater that flows out well body by groundwater velocity instrument 3, according to the area A of underground water volume V in well and upper strata screen casing, estimates the loop cycle T=V/Au of native system.
The mixed gas of the air injecting by gas injection system or ozone and air, a part is collected by extraction pump 10, and a part enters in unsaturation band 24, promotes aerobic degradation and the oxygenolysis of organic microorganism in unsaturation band 24; Can combine gas extraction well 21, with extraction pump 22, the organism evaporating in unsaturation band 24 be collected, discharge after absorbent charcoal adsorber 23 purifies, controls gas extracting speed 10～100m
3/ h, the organic contamination of simultaneously repairing saturation zone 26 and unsaturation band 24.
Adopt said apparatus to repair polluted underground water, mainly comprise the following steps:
1) beat the above circulation well of a bite at Polluted area, well depth is near near source of pollution belows (be that lower floor's screen casing 1 is placed in saturation zone, upper strata screen casing 2 is placed in unsaturation band);
2) beat gas extraction well more than a bite at the unsaturation band of Same Site, the spacing of extraction well and circulation well is 3～10m;
3) start aerator, start gas gathering system simultaneously, underground water flows into from lower floor's screen casing, and upper strata screen casing flows out, and a mixed gas part that contains organic gas and air/ozone is collected, and another part enters into soil unsaturation band;
4) recycle system stable after, by flowing out cycle of operation of groundwater velocity estimating system of well body;
5) extractor of startup gas extraction well, with 10～100m
3the speed of/h in unsaturation band, evaporate and by upper strata screen casing enter unsaturation band organism collect and process, prevent that organism from evaporateing in ambient atmosphere;
6) start medicament sprinkling system, to peripheral oxygenant, microbiobacterial agent or the nutritive substance of spraying of upper strata screen casing, the medicament spraying is with groundwater flow diffusion mobility, the residual contaminants of repairing in radius is removed, the treatment effect of consolidation system, reduces thereby sprinkling oxidation medicament etc. can also carry out oxidation removal to the organism from the mixed gas of upper strata screen casing inflow unsaturation band the organic gas that enters unsaturation band.
Circulation well system of the present invention, can reach more than 92% for the underground environment remediation efficiency of organic contamination.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.
Claims (10)
1. one kind for removing the circulation well system of underground water volatile organic matter, it is characterized in that: described system comprises Wai Jing, Nei Jing, gas injection system, gas extraction system and medicament sprinkling system, described interior well is placed in described outer well, described gas injection system is for passing into gas aeration to described interior well well water, after aeration, discharge through absorbent charcoal adsorber absorption after by the extracting of described gas extraction system doped with the described gas part of organic pollutants, another part enters described outer well, and described medicament sprinkling system is for spraying liquid to described outer well.
2. according to claim 1 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: on the described interior well borehole wall, have upper strata screen casing and lower floor's screen casing, make water body circulation in described interior well and described outer well, screen casing bottom, described upper strata is lower than the well water water surface.
3. according to claim 2 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: near described upper strata screen casing and described lower floor screen casing, fill gravel between described Nei Jing and outer well, between described upper strata screen casing and described lower floor screen casing, fill concrete is between described Nei Jing and outer well.
4. according to claim 3 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: gas injection system comprises pneumatic pump, valve and aeration tube, described aeration tube one end connects described pneumatic pump through described valve, and the other end inserts interior well and is placed in screen casing place of described lower floor.
5. according to claim 4 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: described aeration tube head is provided with aeration head, for uniform aeration.
6. according to claim 3 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: described gas extraction system comprises extraction pump, valve and extraction pipe, described absorbent charcoal adsorber is led to after being connected with described extraction pump by described valve in described extraction pipe one end, the other end inserts interior well and is placed on well water face, and described interior well well head sealing arranges.
7. according to claim 3 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: described medicament sprinkling system comprises killer injecting pump, valve and medicine-pouring pipe, described medicine-pouring pipe one end is connected with described killer injecting pump through described valve, the other end inserts described outer well and is placed on well water face, and described outer well wellhead sealing arranges.
8. according to claim 7 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: also comprise the medicament shower that is positioned at outer well, described medicament shower is connected and is placed on well water face with medicine spraying tube in described outer well.
9. according to claim 1 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: also comprise near the gas extraction well system of described circulation well that is positioned at, described gas extraction well system comprises extraction well, extraction tube, extraction pump and absorbent charcoal adsorber, described extraction tube one end connects described extraction pump, the other end is placed in described extraction well, and described extraction pump connects described absorbent charcoal adsorber.
10. according to claim 1 for removing the circulation well system of underground water volatile organic matter, it is characterized in that: described interior well is UPVC pipe or stainless steel tube.
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| CN201410052490.XA CN103864263B (en) | 2014-02-14 | 2014-02-14 | A kind of circulation well system for removing volatile organic matter in underground water |
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| CN201410052490.XA CN103864263B (en) | 2014-02-14 | 2014-02-14 | A kind of circulation well system for removing volatile organic matter in underground water |
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| CN103864263B CN103864263B (en) | 2016-06-01 |
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