CN214289987U - Heat-enhanced multiphase extraction system for water-bearing stratum NAPL pollution - Google Patents
Heat-enhanced multiphase extraction system for water-bearing stratum NAPL pollution Download PDFInfo
- Publication number
- CN214289987U CN214289987U CN202022822050.1U CN202022822050U CN214289987U CN 214289987 U CN214289987 U CN 214289987U CN 202022822050 U CN202022822050 U CN 202022822050U CN 214289987 U CN214289987 U CN 214289987U
- Authority
- CN
- China
- Prior art keywords
- extraction
- aquifer
- napl
- extraction pipe
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a heterogeneous extraction system of heat enhancement to aquifer NAPL pollution, for guaranteeing the thorough collection of NAPL pollutant, this system includes heat enhancement system, vertical extraction pipe-line system and horizontal extraction pipe-line system, adopts the heat enhancement means to carry out the regional heating of layering subregion to the specific degree of depth of underground pollution, reduces the pollutant through the heating fast and after the saturated vapor pressure of aqueous phase and gaseous phase, through the continuous vacuum extraction of double pump system for NAPL pollutant can be caught by the extraction pipeline fast in the aquifer; and a staged and staged starting mode is adopted to realize the accurate capture of the pollutants, wherein the tail gas containing the gas-phase pollutants pumped out by the horizontal extraction pipe is purified by the tail gas treatment system, and the sewage containing the dissolved pollutants pumped out by the vertical extraction well is purified and repaired by the sewage treatment system to be qualified.
Description
Technical Field
The utility model relates to a pollute soil and groundwater pollution repair's technique, especially relate to a heterogeneous system of extracting of heat reinforcement to aquifer NAPL pollution.
Background
In recent years, with the acceleration of urbanization progress and the adjustment of the 'two-in three-out' industrial structure in China, industrial enterprises such as pesticides and chemical engineering in large and medium cities are shut down or moved away from urban areas, and a large number of organic pollution sites are left. Typical organic contaminants of soil and groundwater in contaminated sites include benzene series, petroleum hydrocarbons, organic halides, polycyclic aromatic hydrocarbons, pesticides, polychlorinated biphenyls, and the like. Various soil and groundwater remediation technologies are produced in the market for different pollutants, including two major categories, namely in-situ remediation technologies and ex-situ remediation technologies. The in-situ remediation technology is a remediation technology which is carried out on the in-situ and easily-residual parts of the polluted soil without stirring or moving on the basis of not damaging the basic structure of the soil. The method has the advantages of no need of excavating and moving earthwork, flexible and simple operation, relatively low restoration cost, small environmental influence, capability of reducing the concentration of pollutants to the maximum extent, wide application and capability of treating different types of organic pollutants.
Typical in-situ remediation technologies comprise different types of remediation methods such as in-situ gas phase extraction technology, in-situ bioremediation technology, in-situ soil washing technology, in-situ electromagnetic wave frequency heating technology, in-situ vitrification technology and the like, such as physical, chemical and biological remediation methods. The multi-phase extraction (MPE) technology is an environment-friendly in-situ remediation technology, and the technology is characterized in that soil gas, underground water and a floating oil layer in an underground polluted area are extracted to the ground by a vacuum extraction means to be separated and treated so as to control and remediate organic pollutants in the soil and the underground water and achieve the purpose of site remediation. The multiphase separation refers to a process of gas-liquid and liquid-liquid separation of the extract, the separated gas enters a gas treatment unit, and the liquid is treated by other methods. The oil-water mixed liquid phase can remove the floating oil layer by utilizing the gravity settling principle, and water with low oil content is separated. The method has the advantages of low investment, small disturbance, high restoration efficiency, large restoration range, small occupied area, capability of treating high-concentration polluted soil and the like, and simultaneously treating soil gas, underground water, non-aqueous liquid pollutants (NAPL) and the like in a polluted area.
The current multiphase extraction technology has some problems: 1. the multiphase extraction is realized by applying gas phase pressure gradient and hydraulic gradient in an extraction well by means of vacuum equipment (such as a liquid ring pump and a jet pump) and a water pump, and the corresponding pressure gradient of an underground continuous phase flows into the extraction well, so that dissolved pollutants in underground water are removed while recovery of the gas phase pollutants is enhanced, and the conventional multiphase extraction technology is limited by the permeability of site soil and aquifer media at present and is not suitable for sites with poor permeability or large underground water level change; 2. when the extraction treatment is carried out on non-aqueous phase liquid (NAPL) existing in an aquifer, the NAPL enters the soil and accumulates on the underground water surface due to low solubility to form a layer of free phase substances, and the pollution of the soil aquifer caused by the NAPL is a common serious pollution problem. After NAPL enters the aeration zone and the aquifer, the migration of NAPL is an equilibrium process between gravity and capillary pressure, such as lateral diffusion easily occurs on the low permeability stratum, vertical diffusion occurs under the action of gravity in the high permeability stratum, and the pollutants are divided into light non-aqueous liquid (LNAPL) and heavy non-aqueous liquid (DNAPL) according to specific gravity, wherein the LNAPL is mainly concentrated in the saturation zone (also called capillary zone) of the aquifer to form the polluted interface of the capillary barrier grid, the DNAPL is mainly present in the aeration zone and the aquifer, the soil gas pressure is reduced through the high vacuum effect of the LNAPL pollution, so that the pollutants in the soil pores are released into the soil gas under the action of capillary force and are captured and removed by the vacuum extraction equipment, the relative permeability of NAPL is improved through the high vacuum effect of the DNAPL, and water molecules and the DNPL in the aeration zone are mutually replaced, through lasting vacuum pumping effect for this type of pollutant is caught by vacuum apparatus in the aquifer, but all exist and catch incompletely, and the pollutant remains in soil, and a period of time slowly releases to the groundwater again after restoreing the completion, forms "tailing" and bounce-back phenomenon.
In view of various defects and limitations of the existing multiphase extraction technology treatment method and system for the water-bearing layer NAPL pollutants, the development of a technology which is thorough in repair, free of tailing and rebound, economical and applicable, efficient, energy-saving and high in resource utilization degree has important social significance and environmental significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a heat-enhanced multiphase extraction system and a method aiming at the NAPL pollution of an aquifer.
The utility model discloses a realize like this:
the utility model provides a heterogeneous system of extracting of heat reinforcement to aquifer NAPL pollution, extract pipe-line system including heat reinforcement system, vertical extraction pipe-line system and level, heat reinforcement system includes the heater well, and the heater well is arranged perpendicularly in order to carry out layering fixed point heating in soil, extract pipe-line system perpendicularly including extracting pipe perpendicularly and supporting stealthily dirty pump, extract the pipe setting perpendicularly around the heater well to keep certain difference in height with the heater well, the pipe-line system is extracted including the level and extracts pipe and supporting vacuum pump to the level, the pipe setting is extracted to the level on the soil aquifer.
The system further comprises a wastewater treatment system and a tail gas purification system, wherein the wastewater treatment system consists of an oil-water separator, a chemical oxidation reaction tank, an advanced oxidizer and an activated carbon decoloration tower and is used for treating wastewater extracted by the vertical extraction pipeline system; the tail gas purification system consists of a spray tower, a condensation reactor and a gas-liquid separator and is used for treating gas extracted by the horizontal extraction pipeline system.
The oil-water separator adopts a double-stage filter element oil-water separator, the concentration of oil in tail water is lower than 10ppm, the separated high-concentration NAPL adopts a medicament adding mode to carry out chemical strong oxidation treatment, and an activated carbon decoloring tower is filled with a certain amount of activated carbon catalyst loaded with rare heavy metals (lanthanum, Ce and the like); the condensation reactor adopts a condensing agent cooling mode, tail gas after gas-liquid separation enters an air combustion-supporting pipeline of the heat-intensified burner, and the spray towers are provided with tail gas emergency maintenance loops to the air combustion-supporting pipeline of the heat-intensified burner.
Further, the heat strengthening system also comprises a combustor, a sleeve and a nozzle, wherein the sleeve is sleeved in the heating well, and the combustor provides a heating heat source for the heating well through the nozzle.
Further, the vertical extraction pipe comprises a pipe well, a stainless steel sleeve and a screen pipe.
Furthermore, gravel with the thickness of 3cm-5cm is laid around the horizontal extraction pipe, the horizontal extraction pipe is made of PVC or stainless pipes, air holes are formed in the pipes, and the proportion of the holes formed in the pipes is 60%.
Further, tail gas clean-up system and effluent disposal system all adopt integrated design, and the component equipment all sets up in portable sled dress structure.
Furthermore, the system also comprises a control system, wherein the control system comprises a computer, a PLC, a flowmeter, an adjusting valve, a stop valve, a thermocouple, a pressure transmitter and the like, and the flowmeter, the adjusting valve, the stop valve, the thermocouple and the pressure transmitter are all arranged in the heat strengthening system, the vertical extraction pipeline system, the horizontal extraction pipeline system, the tail gas purification system and the wastewater treatment system and are connected with the PLC and the computer through control cables.
The utility model discloses following beneficial effect has:
1. the utility model discloses carry out heterogeneous extraction technique of heat strengthening to aquifer NAPL pollutant, adopt the heat strengthening mode, heat to 50 ℃ to the water in the aquifer, soil heating to 80 ℃, can effectively guarantee that the pollutant desorbs in soil, realizes the migration of aqueous phase and gaseous phase, better improvement extraction effect.
2. The utility model discloses a vertical extraction pipeline and horizontal extraction pipeline and well from the design of heater well, heater well arrange apart from 5 ~ 10m, perpendicular pipeline arrange apart from 5 ~ 8m, the horizontal extraction pipeline's interval is in 10m, and adopts the layering heating, and the mode of layering extraction perpendicularly, the horizontal extraction pipeline setting more does benefit to the gas phase and collects in the aquifer top.
3. The utility model discloses a hierarchical start-up mode, more be superior to the system to the accurate entrapment of the various looks attitude of NAPL pollutant, wherein start the thermal strengthening heating system earlier, treat that aquifer well water temperature starts the perpendicular extraction system after reaching 50 ℃, extract dirty groundwater and dissolve attitude organic matter among them, treat that aquifer soil temperature starts the level extraction system after reaching 80 ℃, extract the organic matter of desorption in the soil, effectively guarantee the thorough collection of the NAPL pollutant of each absorption attitude.
4. The utility model discloses a tail gas purification system through spray and the condensation mode, with the organic matter enrichment to liquid and carry out the pertinence and handle, the remaining noncondensable gas crosses the tail gas return circuit and gets into the combustion-supporting pipeline of heat strengthening combustor air and carries out combustor burning purification treatment, reaches in the noncondensable gas residual organic matter 100% and gets rid of, avoids producing secondary pollution to the environment.
5. The utility model discloses a wastewater treatment system then adopt oil-water separation and chemical oxidation and advanced oxidation technical route, through adding suitable oxidation medicament and control ozone generator ozone concentration, reach the thorough oxidative decomposition of organic matter, can guarantee to extract waste water discharge to reach standard.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an arrangement structure of a heating well, a vertical extraction pipeline and a horizontal extraction pipeline in a heat-enhanced multi-phase extraction system in an embodiment of the present invention;
FIG. 2 is a ground sectional view of a heating area according to an embodiment of the present invention;
in the figure: 1-heating a well; 2-vertical extraction pipe; 3-horizontal extraction tube; 4-waterproof curtain; 5-temperature detection well; 6-gravel; 7-original soil; 8-an insulating layer; 9-concrete layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and 2, the embodiment of the utility model provides a heterogeneous system of extracting of heat reinforcement to aquifer NAPL pollution, extract pipe-line system including heat reinforcement system, vertical extraction pipe-line system and level, heat reinforcement system includes the heater well, and the heater well is arranged perpendicularly in soil in order to carry out layering fixed point heating, vertical extraction pipe-line system includes vertical extraction pipe and supporting submersible sewage pump, and vertical extraction pipe sets up around the heater well to keep certain difference in height with the heater well, horizontal extraction pipe-line system includes horizontal extraction pipe and supporting vacuum pump, horizontal extraction pipe sets up on soil aquifer.
The heating well is constructed in a layered heating area and is protected by a waterproof curtain, the vertical extraction pipes are arranged around the heating well at intervals, a plurality of temperature detection wells are further arranged in the heating area and can detect the temperature of soil in the heating area at any time, the vertical extraction system and the horizontal extraction system are conveniently opened step by step, gravels with the thickness of 3cm-5cm are paved around the horizontal extraction pipes, and a heat preservation layer and a concrete layer are sequentially arranged above the soil layer in order to maintain the temperature of the soil layer.
The system also comprises a wastewater treatment system and a tail gas purification system, wherein the wastewater treatment system consists of an oil-water separator, a chemical oxidation reaction tank, an advanced oxidizer and an activated carbon decoloration tower and is used for treating wastewater extracted by the vertical extraction pipeline system; the tail gas purification system consists of a spray tower, a condensation reactor and a gas-liquid separator and is used for treating gas extracted by the horizontal extraction pipeline system.
The system also comprises a control system, wherein the control system is composed of a computer, a PLC, a flowmeter, an adjusting valve, a stop valve, a thermocouple, a pressure transmitter and the like, and the flowmeter, the adjusting valve, the stop valve, the thermocouple and the pressure transmitter are all arranged in the heat strengthening system, the vertical extraction pipeline system, the horizontal extraction pipeline system, the tail gas purification system and the wastewater treatment system and are connected with the PLC and the computer through control cables.
Specifically, the heat strengthening system consists of a heating well, a sleeve, a burner and a nozzle, wherein the heating well is vertically arranged in soil for layered fixed-point heating; the system comprises a vertical extraction pipeline system, a pipeline system and a pipeline system, wherein the vertical extraction pipeline system is arranged by adopting a well slave, is arranged around a heating well, keeps a certain height difference with the heating well, and is mainly used for extracting underground water; the horizontal extraction pipeline system is used for extracting gas-phase pollutants generated in the heat strengthening process, is arranged on the upper layer of the aquifer, gravels with the particle size of 3cm-5cm and with a certain thickness are paved in the horizontal extraction area, the horizontal extraction pipe is made of PVC or stainless pipes, the proportion of the holes of the pipes is about 60%, and a good gas flow channel can be formed in the pipeline in the vacuum pump work.
The wastewater treatment system consists of an oil-water separator, a chemical oxidation reaction tank, an advanced oxidizer and an activated carbon decoloration tower, wherein the oil-water separator adopts a two-stage filter element oil-water separator, the concentration of oil in tail water is lower than 10ppm, and high-concentration NAPL separated in the oil-water separator adopts a medicament adding mode to carry out chemical strong oxidation treatment; filling a certain amount of activated carbon catalyst loaded with rare heavy metals (lanthanum, Ce and the like) in the activated carbon decoloring tower; the tail gas purification system comprises a spray tower, a condensation reactor and a gas-liquid separator, wherein the condensation reactor adopts a condensing agent cooling mode, tail gas after gas-liquid separation enters an air combustion-supporting pipeline of the heat-intensified combustor, and the spray tower is provided with tail gas emergency maintenance loops to the air combustion-supporting pipeline of the heat-intensified combustor.
Tail gas purification system and effluent disposal system adopt the integrated design, and the component equipment all sets up in portable sled dress structure, convenient equipment and removal.
Specifically, when the system works and operates, the following steps are adopted:
step 1: carrying out heat strengthening heating on soil and underground water with a specified depth, keeping the heating temperature of a burner at about 150-200 ℃ in the heating process, and arranging heating wells by combining the characteristics of the depth, thickness and pollutants of an aquifer, wherein the spacing between the heating wells is within the range of 5-10 m and the regular quadrilateral arrangement is adopted;
step 2: starting a vertical extraction system to extract liquid-phase underground water, extracting polluted underground water, determining the lift of a water pump according to the depth of the underground water and the on-way pressure loss, designing the arrangement of a vertical extraction well according to the soil permeability coefficient and the depth of an aquifer, wherein the arrangement interval is 5-8 m, starting a horizontal extraction system when the heating temperature of the aquifer soil reaches 80 ℃ by heat strengthening, reducing the gas phase saturation vapor pressure of NAPL pollutants by heating, promoting more water-phase pollutants and soil adsorption-state pollutants to be changed into gas phase, and extracting the gas phase from the horizontal extraction system, wherein the vacuum degree of the horizontal extraction system is ensured to be 40-90 kpa, and the arrangement interval is 10 m;
and step 3: the polluted underground water extracted in the step 2 enters a wastewater treatment system, oil-water separation is carried out after the polluted underground water passes through an oil-water separator, oil-phase pollutants are independently collected and then are added with 10-20% of oxidation agents in mass ratio for complete oxidation treatment, the rest wastewater enters a chemical oxidation reaction tank, a Fenton reagent is added for primary oxidation treatment, the oxidation effect is about 50%, then the polluted underground water enters an advanced oxidizer, after secondary ozone oxidation treatment, the ozone concentration is 10-30 mg/L, 95% of organic matters in the wastewater are oxidized and decomposed into carbon dioxide and water and a small amount of micromolecular organic matters, finally the polluted underground water is conveyed to an active carbon decoloring tower through a slurry pump at the outlet of the advanced oxidizer, the active carbon is modified by rare heavy metals (lanthanum, Ce and the like) and has certain catalytic decomposition capacity, the clear liquid is guaranteed to be catalytically decomposed again in the decoloring process, the decomposition rate of the organic matters is more than 95%, the emission standard is met;
and 4, step 4: the waste gas extracted in the step 2 passes through a spray tower, the temperature of the waste gas is reduced from 120 ℃ to about 60 ℃, 99.5% of dust in the waste gas is removed in the spraying process, then the waste gas passes through an air cooling condensation reactor, the temperature is further reduced to about 10 ℃, the condensed waste gas enters a gas-liquid separator for gas-liquid separation treatment, about 70% -85% of organic matters in the gas can be enriched to a liquid phase in the steps, the condensed and separated liquid phase pollutants are collected in a centralized manner through the gravity flow effect and then are treated independently by adopting the oil phase pollutants in the step 3, the gas-liquid separated noncondensable gas enters a heat-enhanced combustor air combustion pipeline through a tail gas loop for combustor combustion purification treatment, and 100% of the residual organic matters in the noncondensable gas is removed.
The utility model discloses there is the heterogeneous condition in the aquifer to soil, for guaranteeing the thorough collection of NAPL pollutant, adopt the heat-strengthening means to pollute specific degree of depth to the underground and carry out layering subregion heating, reduce the pollutant fast through the heating behind the saturated vapor pressure of aqueous phase and gaseous phase, the vacuum extraction that the rethread double pump system lasts, make NAPL pollutant can be caught by the extraction pipeline fast in the aquifer, wherein the extraction pipeline is extracted well and horizontal extraction well group perpendicularly and is constituteed, the saturated gas that the horizontal extraction pipe was extracted then carries out purification treatment through tail gas treatment system, the sewage that the vertical extraction well was extracted then carries out purification treatment by sewage treatment system and restores qualifiedly.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A thermally enhanced multiphase extraction system for aquifer NAPL contamination, characterized by: including heat strengthening system, vertical extraction pipe-line system and horizontal extraction pipe-line system, heat strengthening system includes the heating well, and the heating well is arranged perpendicularly in soil in order to carry out layering fixed point heating, vertical extraction pipe-line system includes vertical extraction pipe and supporting stealthily dirty pump, and vertical extraction pipe sets up around the heating well to keep certain difference in height with the heating well, horizontal extraction pipe-line system includes horizontal extraction pipe and supporting vacuum pump, horizontal extraction pipe sets up on soil aquifer.
2. The thermally enhanced multiphase extraction system for aquifer NAPL contamination of claim 1, wherein: the system also comprises a wastewater treatment system and a tail gas purification system, wherein the wastewater treatment system consists of an oil-water separator, a chemical oxidation reaction tank, an advanced oxidizer and an activated carbon decoloration tower and is used for treating wastewater extracted by the vertical extraction pipeline system; the tail gas purification system consists of a spray tower, a condensation reactor and a gas-liquid separator and is used for treating gas extracted by the horizontal extraction pipeline system.
3. The thermally enhanced multiphase extraction system for aquifer NAPL contamination of claim 2, wherein: the heat strengthening system further comprises a combustor, a sleeve and a nozzle, the sleeve is sleeved in the heating well, and the combustor provides a heating heat source for the heating well through the nozzle.
4. The thermally enhanced multiphase extraction system for aquifer NAPL contamination of claim 2, wherein: the vertical extraction pipe comprises a pipe well, a stainless steel sleeve and a sieve pipe.
5. The thermally enhanced multiphase extraction system for aquifer NAPL contamination of claim 2, wherein: gravel with the thickness of 3cm-5cm is laid around the horizontal extraction pipe, the horizontal extraction pipe is made of PVC or stainless pipes, air holes are formed in the pipes, and the proportion of the holes in the pipes is 60%.
6. The thermally enhanced multiphase extraction system for aquifer NAPL contamination of claim 2, wherein: the tail gas purification system and the wastewater treatment system are integrally designed, and the equipment is arranged in a movable skid-mounted structure.
7. The thermally enhanced multiphase extraction system for aquifer NAPL contamination according to any one of claims 2 to 6, wherein: still include control system, control system comprises computer, PLC, flowmeter, governing valve, trip valve, thermocouple, pressure transmitter etc. flowmeter, governing valve, trip valve, thermocouple, pressure transmitter all install in thermal strengthening system, vertical extraction pipe-line system, horizontal extraction pipe-line system, tail gas clean-up system, effluent disposal system to be connected with PLC and computer through control cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022822050.1U CN214289987U (en) | 2020-11-30 | 2020-11-30 | Heat-enhanced multiphase extraction system for water-bearing stratum NAPL pollution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022822050.1U CN214289987U (en) | 2020-11-30 | 2020-11-30 | Heat-enhanced multiphase extraction system for water-bearing stratum NAPL pollution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214289987U true CN214289987U (en) | 2021-09-28 |
Family
ID=77845102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022822050.1U Active CN214289987U (en) | 2020-11-30 | 2020-11-30 | Heat-enhanced multiphase extraction system for water-bearing stratum NAPL pollution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214289987U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798313A (en) * | 2021-09-30 | 2021-12-17 | 上海市政工程设计研究总院（集团）有限公司 | In-situ gas thermal desorption system for polluted site |
-
2020
- 2020-11-30 CN CN202022822050.1U patent/CN214289987U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113798313A (en) * | 2021-09-30 | 2021-12-17 | 上海市政工程设计研究总院（集团）有限公司 | In-situ gas thermal desorption system for polluted site |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10940514B2 (en) | In-situ thermal desorption system, in-situ thermal desorption-oxidation repair system and repair method | |
| CN112620325A (en) | System and method for heat-enhanced multiphase extraction aiming at aquifer NAPL pollution | |
| CN103112915B (en) | Circulation well method and device for removing pollutants in underground water | |
| CN204737749U (en) | Volatile organic compounds pollutes normal position prosthetic devices of groundwater | |
| KR101278088B1 (en) | Complex treatment-type PRB for purifying chemically and biologically contaminants in soil and underground water | |
| CN105417769B (en) | A kind of laboratory carbon tetrachloride separating treatment system and its handling process | |
| CN104724818B (en) | A kind of carbon tetrachloride piece-rate system and separating technology thereof | |
| CN102815832B (en) | Ozone-permeable reactive barrier repair system and method for groundwater repair by using the same | |
| CN111097787B (en) | Method for restoring polluted soil and underground water | |
| CN214289987U (en) | Heat-enhanced multiphase extraction system for water-bearing stratum NAPL pollution | |
| CN111097785B (en) | Method for restoring polluted soil and underground water | |
| KR101691425B1 (en) | Complex Purification System of Oil-polluted Underground Water by Physical and Chemical | |
| CN113500091A (en) | Heavy metal contaminated soil and underground water repairing system and repairing method | |
| KR20100067161A (en) | In-situ remediation of fe and mn in groundwater using oxygen zone | |
| CN111136093B (en) | Method for restoring polluted soil and underground water | |
| CN208643668U (en) | A kind of original position soil thermal desorption steam extraction equipment | |
| CN104478027B (en) | For the technique that volatile organic contaminant in subsoil water is repaired | |
| CN112429864B (en) | System and method for repairing organic polluted groundwater | |
| CN211035509U (en) | A processing system for polluting organic sewage of place restoration process | |
| CN105036224B (en) | Groundwater Treatment Methodss containing carbon tetrachloride | |
| Chen et al. | Hydraulic circulation technology remediates the contaminated groundwater with petroleum hydrocarbon: Evidence from laboratory and field tests | |
| WO1995034349A1 (en) | Method and apparatus for in situ soil remediation | |
| CN205856037U (en) | A kind of atomising device in continuous processing subsoil water in volatile organic matter complete set of equipments | |
| Shevah et al. | In-situ and on-site treatment of groundwater (Technical report) | |
| CN204643944U (en) | A kind of tetracol phenixin separation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |