CN218435217U - Circulating well repairing system for treating organic matters in polluted underground water - Google Patents
Circulating well repairing system for treating organic matters in polluted underground water Download PDFInfo
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- CN218435217U CN218435217U CN202221738256.9U CN202221738256U CN218435217U CN 218435217 U CN218435217 U CN 218435217U CN 202221738256 U CN202221738256 U CN 202221738256U CN 218435217 U CN218435217 U CN 218435217U
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Abstract
The utility model provides a circulating well repairing system for treating organic matters in polluted underground water, which comprises a circulating well arranged in a circulating well drilling hole, wherein an aeration unit, an air stripping unit, a water pumping unit and an oxidation module are arranged in the circulating well, and the oxidation module is an oxidation column or an oxidant fixed at the bottom of the circulating well; the aeration unit comprises an aeration pipe which extends into the bottom of the circulating well and an air pump which is connected with the aeration pipe and is used for increasing the DO content of underground water and the airflow strength in the circulating well; the pumping unit comprises a submersible pump which goes deep into the bottom of the circulating well and a pumping main pipe which is connected with the submersible pump, and the other end of the pumping main pipe is connected with the sewage treatment tank and used for realizing underground water circulation and well pipe internal circulation. The utility model discloses to the problem that the processing pollutant that prior art exists is limited, inefficiency, restoration cycle length, trailing or rebound, organic matter pollution repair wide range, simple installation, secondary pollution are few, the repair effect is good, efficient, economic nature is good.
Description
Technical Field
The utility model relates to a groundwater pollutes and restores technical field, especially relates to a circulation well repair system who handles organic matter in polluted groundwater.
Background
The most pollution of underground water is point pollution, which is caused by leakage of organic matters such as petroleum hydrocarbons and the like, sewage discharge or solid waste stacking of chemical enterprises, and continuous infiltration of pollutants into aquifers along with sewage or polluted solution. Pollutants are transported along with underground water, the pollution range is gradually enlarged, and the resource environment and the health of people are adversely affected.
The pollution risk is controlled in a certain area under the condition that the production of an in-service factory is not influenced, and then the pollution is repaired by adopting a reasonable treatment technology, which is very important.
The circulating well process is one of restoration technologies developed based on the principle of physically removing volatile organic pollutants, integrates aeration, gas stripping and air stripping, and is a novel underground water restoration technology. However, the existing circulating well technology has a limited range of treatment on organic matters, and needs to be combined with other technologies (such as in-situ chemical oxidation repair) to achieve a good repair effect.
The in-situ chemical oxidation remediation (ISCO) technology is mainly an underground water in-situ remediation technology which utilizes an oxidizing reagent to be introduced underground and react with pollutants in underground water to achieve a purification effect. The technology has the advantages of small secondary pollution, high pollutant repairing speed and the like and is widely applied.
The traditional direct injection mode of the medicament can consume the medicament in a short time, most of pollutants can be removed in a short time, once injection is stopped, the pollutants remained in the medium can be continuously released into underground water, the problems of pollutant concentration rebound or pollution repair tailing and the like occur, and therefore the medicament needs to be injected repeatedly. In addition, direct addition of oxidizing agents can result in Dissolved Oxygen (DO) or hydrogen peroxide (H) in the groundwater 2 O 2 ) The concentration is ultrahigh, which causes the problems of raw material waste and influence on continuous supply and causes harm to underground microorganisms.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is overcome the defect that prior art exists, the utility model provides a circulation well repair system of processing pollution organic matter in groundwater, the problem to the processing pollutant that prior art exists is limited, inefficiency, restoration cycle length, trailing or rebound, and organic matter pollution repair range is wide, simple installation, secondary pollution are few, the repair effect is good, efficient, economic nature is good.
In order to solve the technical problem, the utility model discloses a technical scheme is: a circulating well repairing system for treating organic matters in polluted underground water comprises a circulating well arranged in a drilling hole of the circulating well, wherein an aeration unit, a gas stripping unit, a water pumping unit and an oxidation module are arranged in the circulating well, and the oxidation module is an oxidation column or an oxidant fixed at the bottom of the circulating well;
the aeration unit comprises an aeration pipe which extends into the bottom of the circulating well and an air pump which is connected with the aeration pipe and is used for increasing the DO content of underground water and the airflow strength in the circulating well;
the air stripping unit comprises an air exhaust pipe entering the circulating well and a plurality of filtering mechanisms connected with the air exhaust pipe and is used for extracting organic matters dissolved in underground water;
the unit that draws water is responsible for including going deep into the immersible pump of circulation well bottom and drawing water that links to each other with the immersible pump, in draw water and be responsible for the other end and be connected with sewage treatment box for realize groundwater circulation and well casing inner loop.
Further, the air stripping unit also comprises a gas-water separator which is arranged in front of the plurality of filtering mechanisms and is communicated with the water pumping main pipe.
Furthermore, a flowmeter, a control valve and a sampling point are sequentially arranged on the exhaust tube, and the flowmeter and the control valve are arranged at the output end of the gas-water separator; the output end of the gas-water separator is sequentially connected with a particle filter, a vacuum pump and an activated carbon tank, and a pressure reducing valve is also arranged between the particle filter and the vacuum pump.
Furthermore, be provided with the multilayer filter screen in the circulation well, the multilayer filter screen is including setting up the upper segment filter screen of upper segment in the circulation well and setting up in the hypomere filter screen of circulation well bottom, aeration pipe end and immersible pump all are located hypomere filter screen.
Furthermore, the pumping system also comprises a pumping branch pipe, wherein the pumping branch pipe extends from the inside of the pumping main pipe and is positioned in the upper filter screen.
Furthermore, a packing layer is arranged in the circulating well drill hole and used for filling a gap between the circulating well and the circulating well drill hole, the packing layer is composed of dense packing and permeable packing, and the permeable packing is filled in the corresponding parts of the upper section filter screen and the lower section filter screen on the outer side of the circulating well.
Furthermore, a control valve and a flow meter are arranged on the aeration pipe, and the control valve and the flow meter are sequentially arranged at the output end of the air pump.
Further, a first sampling point is arranged on the gas stripping unit, and the first sampling point is arranged at the input end of the gas-water separator; and a second sampling point is also arranged on the pumping unit and is arranged at the input end of the sewage treatment box.
Furthermore, a slow-release oxidation column or a granular slow-release oxidizing agent is arranged in the oxidation module.
Furthermore, the tail end of the aeration pipe is fixed by an aeration head bracket arranged in the lower section of the filter screen; the oxidation column is limited by a bracket; the submersible pump is fixed by the submersible pump bracket.
Compared with the prior art, the beneficial effects of the utility model include:
1. the utility model discloses use the combination of well and normal position chemical oxidation technology that will circulate, built underground hydraulic circulation, be applicable to groundwater, saturated area and unsaturated zone's organic matter pollution remediation, application scope is wide.
2. The utility model discloses a slowly-releasing type oxidation column of controllable type both reduced the power supply that traditional oxidation agent poured into, can continuously slowly generate DO again, not only can not cause harm to the underground microorganism, can also provide oxygen for good oxygen type microorganism with the aeration unit together for the process of biodegradable organic matter.
3. The utility model discloses improved original unit that draws water, both can realize groundwater circulation well casing inner loop, also can take groundwater out ground detection and processing, can realize two kinds of operational mode's free switching.
4. The utility model discloses increase the influence radius of medicament, accelerated the efficiency of getting rid of the pollutant, solved pollution treatment's the hangover and the bounce-back problem of pollution.
5. The utility model can obviously reduce the loss of the medicament and has higher economy; and the coating material of the sustained release agent is environment-friendly and has less secondary pollution.
Drawings
The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like elements throughout. Wherein:
fig. 1 is the schematic structural diagram of embodiment 1 of the system for repairing a circulation well for treating organic matters in polluted underground water.
Fig. 2 is the schematic structural diagram of embodiment 2 of the system for repairing a circulation well for treating organic substances in polluted underground water.
The reference numbers in the figures: 1-drilling a circulating well; 11-concrete foundation; 12-a dense filler; 13-a permeable filler; 2-a circulation well pipe; 21-sealing the well cover; 22-upper section filter screen; 23-lower section of filter screen; 3-an aeration unit; 31-an air pump; 32-a first control valve; 33-a first flow meter; 34-an aerator pipe; 35-an aeration head; 4, a water pumping unit; 41-a submersible pump; 42-a water pumping main pipe; 43-pumping branch pipe; 44-a pressure gauge; 45-a second control valve; 46-first sample point; 47-sewage treatment tank; 48-submersible pump power cord and pull rope; 49-submersible pump mount; 5-an oxidation unit; 51-slow release type oxidation column or oxidant; 52-an oxidation column support; 6-a gas stripping unit; 61-a gas-water separator; 62-a vacuum pump; 63-a particulate filter; 64-activated carbon canister; 65-a second flow meter; 66 a third control valve; 67-second sample point; 68-a pressure relief valve; 69-air extraction tube.
Detailed Description
It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.
Example 1
As shown in fig. 1, the utility model provides a circulation well repair system for treating organic matters in polluted groundwater, include: the number and the depth of the circulating well drill holes 1 are designed according to laboratory lab scale test and field pilot test results and related standard requirements, and the circulating well drill holes are distributed on the field; the circulating well pipe 2 is generally made of stainless steel, has a pipe diameter of 200mm and is arranged in the circulating well borehole 1, and the outer diameter of the circulating well pipe 2 is smaller than the inner diameter of the circulating well borehole 1; also comprises an aeration unit 3, a water pumping unit 4, an oxidation unit 5 and an air stripping unit 6.
An upper section of filter screen 22 and a lower section of filter screen 23 are arranged on the circulating well pipe 2, the middle position of the upper section of filter screen 22 is not lower than the lowest groundwater level line, the lowest point of the lower section of filter screen 23 is at the lowest part of the circulating well pipe 2, the well pipe section between the well pipe section at the upper part of the upper section of filter screen and the upper and lower sections of filter screen is a solid pipe section, the bottom of the circulating well pipe 2 is sealed, and the top is sealed by a sealing well cover 21. The mesh structure of the upper and lower sieves 22 and 23 may be a circular hole type or an arch bridge type, wherein the arch bridge type has a better filtering effect.
Filling permeable fillers 13 such as gravel or mung bean sand, quartz sand and the like at the positions corresponding to an upper section of a filter screen 22 and a lower section of a filter screen 23 of the circulating well pipe 2 at a gap between the circulating well drill hole 1 and the circulating well pipe 2, and filling dense fillers 12 such as concrete, cement or cement bentonite at the corresponding solid section; the uppermost part of the gap can be backfilled and compacted by concrete with the thickness of not less than 0.5 m.
The aeration unit 3 includes: an air pump 31, a first control valve 32 and a first flow meter 33 which are arranged on the ground above the circulation well pipe 2, and an aeration head 35 and an aeration pipe 34 which are arranged in the circulation well pipe 2. One end of the aeration pipe 34 is arranged into a U-shaped structure at the tail end in the well pipe, and the aeration head 35 is arranged at the tail end of the aeration pipe 34 with an upward opening; the other end of the aeration pipe 34 passes through the reserved hole of the sealing well cover 21 and is connected with the air pump 31; the first control valve 32 and the first flow meter 33 are arranged on the pipe section of the aeration pipe 34 extending out of the sealing well cover 21 and on the downstream side of the air pump 31;
the pumping unit 4 includes: a sewage treatment tank 47 arranged on the upper ground of the circulation well pipe 2, a pressure gauge 44, a second control valve 45, a first sampling point 46, and a submersible pump 41, a main pumping pipe 42 and a branch pumping pipe 43 arranged in the circulation well pipe 2.
The submersible pump 41 is lifted by the submersible pump bracket 49, so that the distance from the water pumping port to the bottom of the circulating well pipe is at least 1m, and water pumping is facilitated; one end of a submersible pump power line and the pull rope 48 is connected with the submersible pump 41, and the other end of the submersible pump power line penetrates through the reserved hole of the sealed well cover 21 and then is fixed;
one end of the submersible pump water pumping main pipe 42 is connected with the submersible pump 41, and the other end of the submersible pump water pumping main pipe passes through the reserved hole of the sealing well cover 21 and is connected with the sewage treatment tank 47;
the pressure gauge 44, the second control valve 45 and the first sampling point 46 are arranged on the upstream side of the sewage treatment tank 47 on the pipe section of the pumping main pipe 42 extending out of the circulating well pipe 2;
the pumping branch pipe 43 is arranged at the upper part of the pumping main pipe 42 in the circulating well pipe 2 and is vertical to the pumping main pipe 42, and the pumping branch pipe 43 is uniformly provided with jet ports for jetting the groundwater pumped to the upper part by the submersible pump;
the sewage treatment tank 47 can be filled with chemical oxidation agents, biological carbon adsorbents or microbial treatment agents, and the repairing agents are less in dosage due to less water treatment amount, so that the sewage treatment tank can be simply adsorbed or discharged into the circulating well pipe 2 again for circulating treatment.
The oxidation unit 5 includes: a slow-release oxidation column 51 and an oxidation column support 52 which are arranged in the circulating well pipe 2.
The slow-release oxidation column 51 can be a slow-release potassium permanganate candle (KMnO) 4 Paraffin or wax-containing polymer) having a height of 1m above the lowest groundwater level to the bottom of the well, and a length of 1/3 of the bottom end of the slow-release type oxidation column 51 being hollowIs arranged to be sleeved on the oxidation column bracket 52 in the circulating well pipe 2;
the oxidation column support 52 is typically stainless steel and is welded in uniform pairs to the bottom of the circulation well pipe 2.
The stripping unit 6 comprises: a gas-water separator 61 arranged on the upper surface of the circulating well pipe 2, a particle filter 63, a vacuum pump 62, an activated carbon tank 64, a second flowmeter 65, a third control valve 66, a second sampling point 67, a pressure reducing valve 68 and a suction pipe 69.
The air exhaust end of the air exhaust pipe 69 is positioned at the top in the circulating well pipe 2, the air exhaust end is an expanded head facing the circulating well pipe, and the other end of the air exhaust end penetrates through a reserved hole of the sealing well cover 21 and is connected with the gas-water separator 61;
the second flowmeter 65, the third control valve 66 and the second sampling point 67 are arranged on the pipe section of the extraction pipe 69 extending out of the sealing well cover 21 and on the upstream side of the gas-water separator 61; after passing through the gas-water separator 61, the gas part pumped out by the vacuum pump 62 is discharged from the upper end outlet of the gas-water separator 61, and then is discharged into the atmosphere after passing through the particle filter 63, the pressure reducing valve 68, the vacuum pump 62 and the activated carbon tank 64 in sequence; the liquid part pumped by the vacuum pump 62 is discharged from the lower end outlet of the gas-water separator 61, is connected with the downstream end of the water pumping main pipe 42 of the water pumping unit 4, enters the sewage treatment tank 47 for treatment, and is discharged into a municipal pipe network or returns to the circulating well pipe 2 for circulation.
When the field pollutants only have VOCs, the air pump 31 is started, the first control valve 32 is opened, air is introduced into the underground water of the circulating well pipe 2, and the DO content in the underground water and the air flow strength in the well are increased by aeration in the well;
closing the second control valve 45 on the pumping main pipe 42, starting the submersible pump 41, lifting the underground water to the top of the well by the submersible pump 49, and then spraying the underground water downwards through the spray ports of the pumping branch pipes 43; the vacuum pump 62 and the third control valve 66 are opened, the organic VOCs dissolved in the underground water can be blown out by aeration in the well and gas extraction, and are pumped out by the extraction unit 4 for treatment;
and opening a second control valve 45 on the pumping main pipe 42 according to the designed monitoring and detecting time requirement, pumping an underground water sample, and checking the underground water repairing effect.
In the process, the underground water level in the well rises, and under the action of the water level difference, the underground water in the well overflows from the upper section of the filter screen 22 and flows into the underground water area around the well through the permeable filler 13; meanwhile, the submersible pump 41 pumps underground water in the well to promote the underground water around the well to enter the well from the lower section filter screen 23, so that internal and external circulation of the underground water is realized.
Example 2:
if the underground water pollutants are polluted by light non-aqueous phase liquids (LNAPLs) and light non-aqueous phase liquids (DNAPs) which are overproof except VOCs, the slow-release type oxidation column 51 is placed on the oxidation column bracket 52 in the circulating well pipe 2, and then the light non-aqueous phase liquids (LNAPLs) and the light non-aqueous phase liquids (DNAPs) organic matters in the underground water can be removed.
As shown in FIG. 2, the type of the slow-release type oxidation column may be selected according to the type of the contaminant, or the column may be changed to a granular or spherical shape or a shape other than the above, or calcium peroxide (Ca) 2 O 2 ) And other types of slow-release oxidants, a medicament inlet can be preset on the sealing well cover 21.
According to the actual pollutant types and quantity, during actual operation, only the aeration unit and the water pumping unit can be started firstly, the aeration unit adopts a scheme of firstly continuous aeration and then pulse aeration to operate equipment, or can adopt a scheme of operating equipment at equal time intervals, the operation period of the water pumping unit is the same as that of the aeration unit, and the air lifting unit is started to carry out air lifting after the water pumping unit operates for a period of time.
In some embodiments, only the pumping unit 4 and the oxidation unit 5 can be started, the oxidation unit 5 can be effective for a long time, and the pumping unit 4 can enlarge the influence range of the oxidant.
The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical spirit of the present invention, and these modifications and changes should fall within the protection scope of the present invention.
Claims (10)
1. A circulating well repairing system for treating organic matters in polluted underground water is characterized by comprising a circulating well arranged in a circulating well drilling hole (1), wherein an aeration unit (3), an air stripping unit (6), a water pumping unit (4) and an oxidation module are arranged in the circulating well, and the oxidation module is an oxidation column or an oxidant fixed at the bottom of the circulating well;
the aeration unit (3) comprises an aeration pipe (34) extending into the bottom of the circulating well and an air pump (31) connected with the aeration pipe (34) and is used for increasing the DO content of underground water and the airflow strength in the circulating well;
the gas stripping unit (6) comprises an air extraction pipe (69) entering the circulating well and a plurality of filtering mechanisms connected with the air extraction pipe (69) and is used for extracting organic matters dissolved in underground water;
the water pumping unit (4) comprises a submersible pump (41) which is deep into the bottom of the circulating well and a water pumping main pipe (42) which is connected with the submersible pump (41), and the other end of the water pumping main pipe (42) is connected with a sewage treatment tank (47) and used for realizing underground water circulation and well pipe internal circulation.
2. The circulating well remediation system for treating organic matters in polluted underground water as claimed in claim 1, wherein the gas stripping unit (6) further comprises a gas-water separator (61), the gas-water separator (61) is arranged in front of the plurality of filtering mechanisms, and the gas-water separator (61) is communicated with the water pumping main pipe (42).
3. The circulating well remediation system for treating organic matters in polluted underground water as claimed in claim 2, wherein a flow meter, a control valve and a sampling point are sequentially arranged on the extraction pipe (69), and the flow meter and the control valve are arranged at the output end of the gas-water separator (61); the output end of the gas-water separator (61) is sequentially connected with a particle filter (63), a vacuum pump (62) and an activated carbon tank (64), and a pressure reducing valve (68) is further arranged between the particle filter (63) and the vacuum pump (62).
4. The system for repairing a circulation well for treating organic matters in polluted groundwater as claimed in claim 1, wherein a plurality of layers of filter screens are arranged in the circulation well, each layer of filter screen comprises an upper filter screen (22) arranged at the upper section of the circulation well and a lower filter screen (23) arranged at the bottom of the circulation well, and the tail end of the aeration pipe (34) and the submersible pump (41) are both positioned in the lower filter screen (23).
5. The system of claim 4, wherein the pumping unit further comprises a branch pumping pipe (43), the branch pumping pipe (43) extends from the main pumping pipe (42) and the branch pumping pipe (43) is located in the upper screen (22).
6. The circulating well remediation system for treating organic matters in polluted underground water according to claim 4, wherein a packing layer is further arranged in the circulating well bore (1) and used for filling a gap between the circulating well and the circulating well bore (1), the packing layer is composed of a compact packing (12) and a permeable packing (13), and the upper section of the filter screen (22) and the lower section of the filter screen (23) are filled with the permeable packing (13) at the corresponding parts outside the circulating well.
7. The system for remediating a circulation well for treating organic matters in polluted underground water as claimed in claim 1, wherein a control valve and a flow meter are further arranged on the aeration pipe (34), and the control valve and the flow meter are sequentially arranged at the output end of the air pump (31).
8. The circulating well remediation system for treating organic matters in polluted underground water as claimed in claim 2, wherein a first sampling point is arranged on the gas stripping unit (6), and the first sampling point is arranged at the input end of the gas-water separator (61); and a second sampling point is also arranged on the water pumping unit (4), and is arranged at the input end of the sewage treatment tank (47).
9. The system for remediating a circulation well for treating organic matters in contaminated groundwater according to claim 1, wherein a slow-release type oxidation column or a granular slow-release type oxidizer is disposed in the oxidation module.
10. The system for remediating an organic matter in contaminated groundwater according to any one of claims 1 to 9, wherein the aerator pipe (34) is supported by an aerator head (35) disposed inside the lower screen (23) to fix the end of the aerator pipe (34); the oxidation column is limited by a bracket; the submersible pump (41) is fixed by a submersible pump bracket (49).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221738256.9U CN218435217U (en) | 2022-07-07 | 2022-07-07 | Circulating well repairing system for treating organic matters in polluted underground water |
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| CN202221738256.9U CN218435217U (en) | 2022-07-07 | 2022-07-07 | Circulating well repairing system for treating organic matters in polluted underground water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180714A (en) * | 2022-07-07 | 2022-10-14 | 江苏华东地质建设集团有限公司 | Circulating well repairing system for treating organic matters in polluted underground water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180714A (en) * | 2022-07-07 | 2022-10-14 | 江苏华东地质建设集团有限公司 | Circulating well repairing system for treating organic matters in polluted underground water |
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