CN112645542A - Circulating well system for in-situ remediation of organic polluted underground water - Google Patents
Circulating well system for in-situ remediation of organic polluted underground water Download PDFInfo
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- CN112645542A CN112645542A CN202011586707.7A CN202011586707A CN112645542A CN 112645542 A CN112645542 A CN 112645542A CN 202011586707 A CN202011586707 A CN 202011586707A CN 112645542 A CN112645542 A CN 112645542A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2101/30—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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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- Biomedical Technology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Water Treatment By Sorption (AREA)
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Abstract
The invention discloses a circulating well system for in-situ remediation of organic polluted underground water, which comprises: the well pipe unit is connected with the aeration unit, the medicament unit and the gas treatment unit. Through the mode, the circulating well system for in-situ remediation of the organic polluted underground water disclosed by the invention couples the underground water circulating well technology with the microorganism treatment technology, does not need to pump out the ground for ex-situ treatment, has the advantages of small environmental disturbance, low cost and strong adaptability, can obviously improve the underground water remediation efficiency and solve the tailing problem of the traditional circulating well in remediation of the underground water, and provides a new thought and direction for the underground water in-situ treatment technology.
Description
Technical Field
The invention relates to the field of soil remediation, relates to an underground water in-situ remediation system, and particularly relates to a circulating well system for in-situ remediation of organic polluted underground water.
Background
In the existing repair technology for groundwater pollution, pumping treatment cost is high, the application range of stripping treatment is narrow (only suitable for groundwater polluted by VOCs), the bioremediation period is long, practical application is limited, and a technical method for efficiently repairing groundwater pollution is still urgently needed to be developed.
Disclosure of Invention
The present invention has been made to solve the above technical problems, and provides a circulating well system for in-situ remediation of organically-polluted groundwater.
In order to solve the technical problems, the invention adopts a technical scheme that:
there is provided a circulating well system for in situ remediation of organically-polluted groundwater, comprising: the well pipe unit is connected with the aeration unit, the medicament unit and the gas treatment unit,
the well pipe unit comprises a circulating water inlet sieve pipe, a circulating water outlet sieve pipe, a circulating treatment chamber, a gas collection chamber partition plate and a circulating water pump,
the circulating water inlet sieve tube, the circulating water outlet sieve tube and the gas collecting chamber are sequentially connected from bottom to top, the circulating water inlet sieve tube and the circulating water outlet sieve tube are of an integral structure and form a sieve tube, the circulating treatment chamber is sleeved in the sieve tube, the inner wall of the circulating treatment chamber and the sieve tube is in sliding connection, the circulating water pump is positioned on a lower panel of the circulating treatment chamber, the water inlet end of the circulating water pump is positioned in the circulating water inlet sieve tube, the water outlet end of the circulating water pump is positioned in the circulating treatment chamber, the upper panel of the circulating treatment chamber is provided with a water outlet hole, the inner wall of the circulating water outlet sieve tube is provided with a filtering structure, and a gas collecting chamber partition plate is arranged between the circulating water outlet sieve tube and the gas collecting chamber, wherein the gas collecting chamber and the circulating treatment chamber are of a non-permeable closed structure, the gas collecting,
the aeration unit comprises an air compressor and an aeration device, the air compressor is connected with the aeration device, the output end of the aeration device extends into the circulating treatment chamber to introduce air bubbles into the circulating treatment chamber, the chemical unit comprises a chemical storage stirring box and a chemical pipeline, the chemical storage stirring box is connected with the chemical pipeline, the lower end of the chemical pipeline extends into the circulating treatment chamber,
the gas processing unit comprises a waste gas processing device and a gas pipeline, one end of the gas pipeline is connected with the waste gas processing device, and the other end of the gas pipeline is connected with the gas collecting chamber so as to collect waste gas in the well pipe unit.
In a preferred embodiment of the invention, filter material confining means is arranged around the outer wall of the well tubular unit.
In a preferred embodiment of the present invention, the filter material enclosing and filling mechanism is made of graded quartz sand with different particle sizes.
In a preferred embodiment of the invention, the filter structure comprises a filler layer for microorganism adhesion growth and organic matter degradation and/or a filter material layer for adsorbing or reducing heavy metal ions in polluted underground water.
In a preferred embodiment of the invention, the upper part of the gas collecting chamber is provided with a gas collecting hood.
In a preferred embodiment of the invention, the system further comprises a monitoring well unit for detecting the underground water level, and the position of the circulating treatment chamber in the sieve tube is adjusted according to the water level detected by the monitoring well unit so as to adjust the positions of the circulating water inlet pipe and the circulating water outlet pipe.
In a preferred embodiment of the invention, a filter plate, a UV lamp tube, a TiO2 mesh plate and an activated carbon filter plate are arranged in the exhaust gas treatment device.
The invention has the beneficial effects that: the underground water circulating well technology and the microorganism treatment technology are coupled, the ground ex-situ treatment is not required to be pumped out, the environmental disturbance is small, the cost is low, the adaptability is strong, meanwhile, the underground water remediation efficiency can be obviously improved, the tailing problem of the traditional circulating well in the groundwater remediation is solved, and a new thought and direction are provided for the underground water in-situ treatment technology.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic diagram of a preferred embodiment of a circulating well system for in situ remediation of organically-polluted groundwater according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention includes:
a circulating well system for in-situ remediation of organically-polluted underground water couples an underground water circulating well technology with a microorganism treatment technology without pumping out ground ex-situ treatment, and belongs to an environment-friendly technology and has a wide application space in underground water remediation.
A circulating well system for in-situ remediation of organically-polluted groundwater comprises the following functional units:
(1) a well pipe unit: comprises a circulating water inlet sieve tube 11, a circulating water outlet sieve tube, a circulating treatment chamber 12, a gas collection chamber 13, a filtering structure 15, a gas collection chamber partition plate 16 and a circulating water pump 17,
the outer wall of the well pipe unit can be provided with a filter material enclosing and filling mechanism 14 in a surrounding mode so as to improve the stability of the circulating well and prevent the well pipe unit from collapsing, wherein the filter material enclosing and filling mechanism can adopt graded quartz sand with different particle sizes.
The circulating water inlet sieve tube, the circulating water outlet sieve tube and the gas collecting chamber are sequentially connected from bottom to top, and the circulating water inlet sieve tube and the circulating water outlet sieve tube are of an integrated structure and form a sieve tube.
The circulation treatment chamber is sleeved in the sieve tube, the circulation treatment chamber is in sliding connection with the inner wall of the sieve tube, and when the groundwater level changes, the circulation treatment chamber can slide up and down to change the position of the circulation treatment chamber so as to meet different requirements.
The gas collecting chamber and the circulating treatment chamber are made of non-permeable closed materials, the gas collecting chamber partition plate is made of permeable materials, and the sieve pipe is made of permeable materials (namely, the pipe walls of the circulating water inlet sieve pipe and the circulating water outlet sieve pipe are made of permeable materials).
The circulating water pump is positioned on the lower panel of the circulating treatment chamber, the water inlet end of the circulating water pump is positioned in the circulating water inlet sieve tube, the water outlet end of the circulating water pump is positioned in the circulating treatment chamber, and the upper panel of the circulating treatment chamber is provided with a water outlet hole.
Under the action of a circulating water pump, groundwater in a polluted area enters the circulating treatment chamber through the circulating water inlet sieve tube, the aeration unit and the reagent unit inject a stripping and oxidizing reagent into the circulating treatment chamber so as to treat sewage, and treated water enters the circulating water outlet sieve tube from a water outlet hole in the upper panel of the circulating treatment chamber.
The inner wall of the circulating water outlet sieve tube is provided with a filtering structure, the filtering structure comprises a packing layer and/or a filter material layer, the packing layer is beneficial to the attachment and growth of microorganisms, so that residual organic matters in underground water are degraded, the filter material layer can adsorb or reduce heavy metal ions or other impurities in polluted underground water, and the underground water treated by the packing layer and/or the filter material layer can flow out of the well pipe unit.
And a gas collecting chamber partition plate is arranged between the circulating water outlet sieve tube and the gas collecting chamber, a gas collecting hood is arranged at the upper part of the gas collecting chamber, and a gas pipeline extracts overflowed gas in the well pipe unit from the gas collecting chamber and conveys the overflowed gas to a gas treatment device.
(2) An aeration unit: including an air compressor 21 and an aeration device 22. The air compressor is connected with the aeration device, and the output end of the aeration device extends into the circulating treatment chamber so as to introduce air bubbles into the circulating treatment chamber, so that VOCs in the polluted underground water are treated on one hand, and the medicament is uniformly mixed with the polluted underground water by stirring on the other hand.
(3) A drug unit: including a medicament storage agitator tank 31 and a medicament conduit 32. The medicament storage stirring box is connected with the medicament pipeline, and the lower end of the medicament pipeline extends into the circulating treatment chamber. Surfactant or oxidation medicament are stored in the medicament storage stirring box, and are mixed when in use, and the mixed medicament is injected into underground water in the circulating treatment chamber through a medicament pipeline.
(4) A gas processing unit: mainly comprising an exhaust gas treatment device 41 and a gas duct 42. One end of the gas pipeline is connected with the waste gas treatment device, and the other end of the gas pipeline is connected with the gas collection chamber or the gas collecting hood so as to collect waste gas in the well pipe and convey the waste gas into the waste gas treatment device. The waste gas treatment device is internally provided with a filter plate, a UV lamp tube, a TiO2 screen plate and an activated carbon filter plate. After the gas is preliminarily filtered, VOCs in the gas are further oxidized and degraded by UV lamp tube catalysis and a TiO2 screen plate, and the gas is discharged after being further adsorbed by an activated carbon filter plate after being treated.
(5) A monitoring well unit: and the circulating well is provided with a monitoring well in the same area for detecting the underground water level. When the underground water level changes due to seasonal changes or other reasons, the position of the circulating water inlet/outlet pipe is adjusted to adapt to the water level by moving the position of the circulating treatment chamber in the sieve pipe after the monitoring well determines the change.
An operational flow of a circulating well system for in situ remediation of organically-polluted groundwater comprising:
the polluted underground water firstly passes through the circulating water inlet sieve tube and enters the circulating treatment chamber under the action of the circulating water pump. In the circulating treatment chamber, on one hand, polluted underground water is aerated, VOCs in the water is blown off and collected (when the concentration of organic pollution is too high, the process can also adopt an ozone oxidation process, an air compressor is replaced by an ozone generator, so that the VOCs in the underground water can be blown off and part of organic pollutants in the underground water can be oxidized), and on the other hand, an oxidizing agent or a surfactant is added to degrade and inhibit a plurality of pollutants for a long term. And after the underground water is treated in the circulating treatment chamber, conveying the underground water into a circulating water outlet sieve tube, and discharging water after the underground water is adsorbed by the microbial filler and the filter material on the inner wall. The biological filler is loaded with microorganisms, and adsorbs and degrades organic pollutants in underground water or removes nitrogen. The filter material can be selected according to the pollution state of underground water, for example, zeolite filter material is used for adsorption, and pollutants such as phosphorus, lead, chromium and the like in underground water are efficiently adsorbed; some toxic higher valence heavy metal contaminants are reduced using zero-valent iron.
And the VOCs gas blown out by the aeration is collected by a gas collecting chamber channel and then is conveyed to a gas treatment device. The treatment device comprises a filter plate, a UV lamp tube, a TiO2 screen plate and an activated carbon filter plate. After the gas is preliminarily filtered, VOCs in the gas is further oxidized and degraded by UV catalytic TiO2, and after the treatment, the gas is further adsorbed by an activated carbon filter plate and then discharged.
The circulating well system for in-situ remediation of organic polluted underground water has the beneficial effects that:
(1) the filler of the water outlet pipe section is beneficial to the attachment and growth of microorganisms, so that residual organic matters in the underground water are adsorbed and degraded, and the filter material can adsorb or reduce heavy metal ions or other impurities in the polluted underground water. The groundwater circulating well technology and the microorganism treatment technology are coupled, so that the groundwater remediation efficiency can be obviously improved, and the remediation period can be shortened.
(2) When the underground water level changes due to seasonal changes or other reasons, the position of the water inlet/outlet pipe section can be adjusted to adapt to the water level by moving the circulating treatment chamber pipe section in the circulating water inlet/outlet screen pipe. The ground ectopic treatment is not required to be taken out, the environmental disturbance is small, the cost is low, and the adaptability is strong.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A circulating well system for in situ remediation of organically-polluted groundwater comprising: the well pipe unit is connected with the aeration unit, the medicament unit and the gas treatment unit,
the well pipe unit comprises a circulating water inlet sieve pipe, a circulating water outlet sieve pipe, a circulating treatment chamber, a gas collection chamber partition plate and a circulating water pump,
the circulating water inlet sieve tube, the circulating water outlet sieve tube and the gas collecting chamber are sequentially connected from bottom to top, the circulating water inlet sieve tube and the circulating water outlet sieve tube are of an integral structure and form a sieve tube section, the circulating treatment chamber is sleeved in the sieve tube, the inner wall of the circulating treatment chamber and the sieve tube is in sliding connection, the circulating water pump is positioned on a lower panel of the circulating treatment chamber, the water inlet end of the circulating water pump is positioned in the circulating water inlet sieve tube, the water outlet end of the circulating water pump is positioned in the circulating treatment chamber, the upper panel of the circulating treatment chamber is provided with a water outlet hole, the inner wall of the circulating water outlet sieve tube is provided with a filtering structure, a gas collecting chamber partition plate is arranged between the circulating water outlet sieve tube and the gas collecting chamber, wherein the gas collecting chamber and the circulating treatment chamber are of a non-permeable closed structure, the gas collecting chamber partition,
the aeration unit comprises an air compressor and an aeration device, the air compressor is connected with the aeration device, the output end of the aeration device extends into the circulating treatment chamber to introduce air bubbles into the circulating treatment chamber, the chemical unit comprises a chemical storage stirring box and a chemical pipeline, the chemical storage stirring box is connected with the chemical pipeline, the lower end of the chemical pipeline extends into the circulating treatment chamber,
the gas processing unit comprises a waste gas processing device and a gas pipeline, one end of the gas pipeline is connected with the waste gas processing device, and the other end of the gas pipeline is connected with the gas collecting chamber so as to collect waste gas in the well pipe unit.
2. A circulating well system for in situ remediation of organically contaminated groundwater as claimed in claim 1, wherein a filter material confining means is provided around the outer wall of the well pipe unit.
3. The circulating well system for in-situ remediation of organically-polluted groundwater as claimed in claim 2, wherein the filter material enclosing and filling mechanism is made of graded quartz sand of different particle sizes.
4. A circulating well system for in-situ remediation of organically-polluted groundwater according to claim 1, wherein the filter structure comprises a packing layer for microorganism attachment growth and degradation of organic matter and/or a filter layer for adsorption or reduction of heavy metal ions in polluted groundwater.
5. The circulating well system for in-situ remediation of organically-polluted groundwater according to claim 1, wherein an upper portion of the gas collection chamber is provided with a gas collection hood.
6. The circulating well system for in-situ remediation of organically-polluted groundwater according to claim 1, further comprising a monitoring well unit for detecting a groundwater level, and adjusting the position of the circulating treatment chamber in the screen according to the water level detected by the monitoring well unit to adjust the positions of the circulating inlet pipe and the circulating outlet pipe.
7. The circulating well system for in-situ remediation of organically-polluted groundwater according to claim 1, wherein a filter plate, a UV lamp tube, a TiO2 mesh plate and an activated carbon filter plate are arranged in the exhaust gas treatment device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011586707.7A CN112645542A (en) | 2020-12-29 | 2020-12-29 | Circulating well system for in-situ remediation of organic polluted underground water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011586707.7A CN112645542A (en) | 2020-12-29 | 2020-12-29 | Circulating well system for in-situ remediation of organic polluted underground water |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277577A (en) * | 2021-06-02 | 2021-08-20 | 吉林大学 | Underground water pollution in-situ circulating repair system based on bubble pulsation theory |
| CN113896345A (en) * | 2021-11-22 | 2022-01-07 | 扎赉诺尔煤业有限责任公司 | In-situ purification device for coal underground gasification water pollution and application method thereof |
| CN114751472A (en) * | 2022-05-12 | 2022-07-15 | 东南大学 | Underground water circulating well device for in-situ remediation of contaminated site and remediation method |
| CN115321644A (en) * | 2022-08-29 | 2022-11-11 | 上海环境保护有限公司 | Electrically enhanced circulating well system and method for treating halogenated hydrocarbons in underground water by using same |
| CN115893552A (en) * | 2023-03-01 | 2023-04-04 | 宝航环境修复有限公司 | Groundwater normal position circulation prosthetic devices |
-
2020
- 2020-12-29 CN CN202011586707.7A patent/CN112645542A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277577A (en) * | 2021-06-02 | 2021-08-20 | 吉林大学 | Underground water pollution in-situ circulating repair system based on bubble pulsation theory |
| CN113896345A (en) * | 2021-11-22 | 2022-01-07 | 扎赉诺尔煤业有限责任公司 | In-situ purification device for coal underground gasification water pollution and application method thereof |
| CN114751472A (en) * | 2022-05-12 | 2022-07-15 | 东南大学 | Underground water circulating well device for in-situ remediation of contaminated site and remediation method |
| CN115321644A (en) * | 2022-08-29 | 2022-11-11 | 上海环境保护有限公司 | Electrically enhanced circulating well system and method for treating halogenated hydrocarbons in underground water by using same |
| CN115321644B (en) * | 2022-08-29 | 2023-08-15 | 上海环境保护有限公司 | Electric strengthening circulating well system and method for treating halogenated hydrocarbon in underground water by using electric strengthening circulating well system |
| CN115893552A (en) * | 2023-03-01 | 2023-04-04 | 宝航环境修复有限公司 | Groundwater normal position circulation prosthetic devices |
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