CN212442524U - Volatile organic pollution site repair system - Google Patents
Volatile organic pollution site repair system Download PDFInfo
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- CN212442524U CN212442524U CN202020245696.5U CN202020245696U CN212442524U CN 212442524 U CN212442524 U CN 212442524U CN 202020245696 U CN202020245696 U CN 202020245696U CN 212442524 U CN212442524 U CN 212442524U
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- 230000008439 repair process Effects 0.000 title claims abstract description 23
- 238000005273 aeration Methods 0.000 claims abstract description 112
- 238000000605 extraction Methods 0.000 claims abstract description 61
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 21
- 231100000719 pollutant Toxicity 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000010865 sewage Substances 0.000 claims description 17
- 238000005067 remediation Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000000741 silica gel Substances 0.000 claims description 5
- 229910002027 silica gel Inorganic materials 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 abstract description 5
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 15
- CFXQEHVMCRXUSD-UHFFFAOYSA-N 1,2,3-Trichloropropane Chemical compound ClCC(Cl)CCl CFXQEHVMCRXUSD-UHFFFAOYSA-N 0.000 description 10
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 10
- 230000035699 permeability Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- KNKRKFALVUDBJE-UHFFFAOYSA-N 1,2-dichloropropane Chemical compound CC(Cl)CCl KNKRKFALVUDBJE-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- -1 Benzene 1,2, 3-trichloropropane Chemical compound 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Physical Water Treatments (AREA)
Abstract
The utility model provides a volatile organic pollution place repair system, including controllable aeration system, heterogeneous extraction system and pollutant processing system, controllable aeration system mainly includes several aeration well, and the different degree of depth region in aeration well is equipped with several aeration head, and every aeration head department is equipped with the floral tube section, and the aeration head communicates to the air compressor machine on the ground through the solenoid valve, the solenoid valve links to each other with central control system; the multiphase extraction system includes a multiphase extraction well disposed at a central location of the plurality of aeration wells. The utility model indirectly controls the opening and closing of the aeration head in the well through the control solenoid valve of the central control system so as to achieve the purpose of controlling the aeration depth, the aeration time and the aeration sequence, and can carry out targeted cyclic aeration on organic pollutants in different stratums or carry out aeration on a certain underground layer position, thereby treating pollutants in heterogeneous stratums; the combined application of the in-situ aeration and the multiphase extraction realizes the purpose of integrally repairing a polluted aeration zone and an aquifer in a field.
Description
Technical Field
The utility model relates to a pollute place repair engineering field, especially relate to heterogeneous stratum pollutes place restoration processing system and method.
Background
In recent years, with the development of economic society and the optimization of industrial structure in China, city regional functions are gradually transformed and city layout adjustment is carried out in various places, and a large number of volatile organic pollution sites are left in cities of central regions of cities, which are continuously moved out of chemical plants and pesticide plants. Most of the organic pollution sites have complex stratums, large pollution depth, various pollutant types and more surrounding sensitive points, and can cause great threat to the surrounding ecological environment and human health without being treated or repaired.
Among the field repair technologies, the in-situ aeration technology is considered to be an economical and effective method for removing volatile organic pollutants in an aquifer, clean air is compressed and injected into the aquifer, and the pollutants are removed through the actions of air stripping, volatilization, dissolution, adsorption-desorption, biodegradation and the like, so that the method is low in repair cost, high in repair efficiency and small in disturbance to the periphery, and is widely concerned by repair companies at home and abroad.
However, the traditional in-situ aeration technology is mainly used for repairing pollution in an aquifer, organic pollution in an aeration zone is difficult to effectively remove, and the whole repair of a polluted site cannot be realized; in the actual repairing process, the gas is affected by the heterogeneity of the stratum and is unevenly distributed in the stratum, so that the actual repairing effect of the technology is greatly reduced, and the application of the technology in the actual site repairing is limited.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a volatile organic pollution site remediation system, which can effectively solve the problem that the traditional in-situ aeration has poor remediation effect on heterogeneous pollution sites; and the system can simultaneously repair the underground aquifer and the aeration zone, and realize the integral repair of the polluted site. The system has the advantages of simple structure, high efficiency, small disturbance to the periphery, no secondary pollution and wide application range. In order to achieve the above object, the utility model adopts the following technical scheme:
a volatile organic pollution place repair system, comprising: controllable aeration system, heterogeneous extraction system and pollutant processing system, wherein:
the controllable aeration system mainly comprises a plurality of aeration wells, wherein pipe orifices at the bottoms and the tops of the aeration wells are sealed, a plurality of aeration heads are arranged in different depth areas in the aeration wells, each aeration well is provided with a perforated pipe section with sieve pores on the surface corresponding to each aeration head, each aeration head is communicated to an air compressor on the ground through an electromagnetic valve, and the electromagnetic valves are connected with a central control system and can enable the plurality of aeration heads to carry out controlled aeration according to a sequence;
the multiphase extraction system comprises multiphase extraction wells arranged at the center positions of the aeration wells, the bottom and top pipe orifices of the multiphase extraction wells are sealed, and the multiphase extraction wells are provided with perforated pipe sections with sieve pores on the surfaces at the underground parts;
the pollutant treatment system can extract and treat the waste gas and the waste water in the multiphase extraction system.
Volatile organic pollution place repair system, wherein: the pollutant treatment system comprises a water pump arranged at the bottom of the multiphase extraction well and a vacuum pump communicated with the multiphase extraction well, the water pump is connected with an overground sewage treatment device, the vacuum pump is connected with the multiphase extraction well through a gas-liquid separator, and a liquid phase pipeline of the gas-liquid separator is communicated to the sewage treatment device.
Volatile organic pollution place repair system, wherein: and 3-6 multi-extraction wells are distributed around each aeration well, the distance between each aeration well and each extraction well is 3-8 m, the depths of the aeration wells and the multi-extraction wells are all larger than the depth of the polluted stratum, and top pipe orifices of the aeration wells and the multi-phase extraction wells are sealed by flanges and silica gel pads.
Volatile organic pollution place repair system, wherein: a pressure stabilizing valve, a pressure gauge and a flowmeter are further arranged on a pipeline between the air compressor and the aeration well, the gas injection pressure is 0.05-0.08 MPa, and the gas injection flow is 5-7 m3/h。
Volatile organic pollution place repair system, wherein: and qualified water after being treated by the sewage treatment device is communicated to the recharging well.
Volatile organic pollution place repair system, wherein: and the downstream of the vacuum pump is connected with an activated carbon adsorption box and an exhaust chimney.
Volatile organic pollution place repair system, wherein: a negative pressure gauge is arranged at the wellhead of the multiphase extraction well, the required extraction pressure is-0.05 to-0.08 MPa, and the pumping flow is 0.5 to 1.0m3/d。
Volatile organic pollution place repair system, wherein: the aeration system, the multiphase extraction system, the internal pipeline of the pollutant treatment system and the pipeline among the systems all adopt PVC pipes.
Volatile organic pollution place repair system, wherein: the number of the aeration heads is 2-5 generally, and the length of the tube segment of the flower at the position of the aeration head is 20-100 cm.
Volatile organic pollution place repair system, wherein: the diameter of the sieve holes of the flower tube section is 2-3 mm; and the periphery of the perforated pipe section is wound by adopting a screen.
The utility model designs a volatile organic pollution site repairing system which can be used for repairing heterogeneous volatile organic pollution sites and consists of a controllable aeration system, a multiphase extraction system and a pollutant treatment system, wherein the opening and closing of an aeration head in a well are indirectly controlled by controlling a solenoid valve through a central control system; aiming at controlling the aeration depth, the aeration time and the aeration sequence, the organic pollutants in different stratums are subjected to targeted cyclic aeration or aeration on a certain layer of underground to treat the pollutants in the heterogeneous stratums; the combined application of the in-situ aeration and the multiphase extraction realizes the purpose of jointly repairing polluted aquifers and aeration zones in the field; pumping the polluted underground water and the polluted gas into a pollutant treatment system for treatment, feeding the polluted underground water into a sewage treatment system for treatment and recharging the polluted underground water to the ground, and discharging the treated gas after reaching the standard without secondary pollution; the system can realize off-site control, can effectively deal with heterogeneous strata, and can realize combined remediation of aquifer and aeration zone pollution; the system has the advantages of simple structure, low manufacturing cost, high pollutant treatment efficiency, no secondary pollution and wide application range.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic plan view of an aeration well and a multiphase extraction well.
Description of reference numerals: 1-a central control system; 2, an air compressor; 3-a pressure maintaining valve; 4-a pressure gauge; 5-a flow meter; 6-electromagnetic valve; 7-an aerator; 8-a flower pipe section; 9-aeration wells; 10-negative pressure gauge; 11-a gas-liquid separator; 12-a sewage treatment plant; 13-a vacuum pump; 14-activated carbon adsorption tank; 15-an exhaust stack; 16-recharging the well; 17-a multiphase extraction well; 18-a water pump; 19-a monitoring well; a-contaminated area.
Detailed Description
Some specific embodiments of the invention will be described in detail below, by way of example and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.
As shown in fig. 1 and fig. 2, the utility model provides a volatile organic pollution place repair system, mainly include: controllable aeration system, heterogeneous extraction system and pollutant processing system, wherein:
the controllable aeration system mainly comprises a plurality of aeration wells 9, the bottoms of the aeration wells 9 are sealed, pipe orifices at the tops of the aeration wells 9 are sealed by flanges and silica gel pads, a corresponding number of aeration heads 7 are arranged in the aeration wells 9 corresponding to different underground depth regions, the aeration wells 9 are provided with perforated pipe sections 8 with sieve pores on the surfaces corresponding to each aeration head 7, the aeration heads 7 are communicated to an air compressor 2 on the ground through electromagnetic valves 6, the electromagnetic valves 6 are connected with a central control system 1, and the opening and closing of each aeration head 7 can be controlled by controlling the on-off of the electromagnetic valves 6 through the central control system 1, so that the aeration depth, the aeration duration and the aeration sequence are controlled; a pressure stabilizing valve 3, a pressure gauge 4 and a flow meter 5 are also arranged on a pipeline between the air compressor 2 and the aeration well 9 so as to accurately control the aeration pressure and flow;
the multiphase extraction system mainly comprises multiphase extraction wells 17 arranged at the central positions of the aeration wells 9, the bottoms of the multiphase extraction wells 17 are sealed, pipe orifices at the tops of the multiphase extraction wells 17 are sealed by flanges and silica gel pads, and the multiphase extraction wells 17 are also provided with perforated pipe sections 8 with sieve pores on the surfaces at the underground parts;
the pollutant treatment system mainly comprises a water pump 18 arranged at the bottom of a multiphase extraction well 17 and a vacuum pump 13 communicated with the multiphase extraction well 17, wherein the water pump 18 is connected with an overground sewage treatment device 12, the downstream of the sewage treatment device 12 is communicated with an underground recharging well 16, the vacuum pump 13 is connected with the multiphase extraction well 17 through a gas-liquid separator 11, the downstream of the vacuum pump 13 is connected with an activated carbon adsorption tank 14 and an exhaust chimney 15, and a liquid phase pipeline of the gas-liquid separator 11 is communicated with the sewage treatment device 12; in order to monitor the air pressure condition in the multiphase extraction well 17, a negative pressure meter 10 is arranged at the wellhead of the multiphase extraction well 17;
when the utility model is used, the aeration heads 7 at different depths in the aeration well 9 aerate according to the set sequence and the time sequence, and the organic pollutants are blown off, volatilized, dissolved, adsorbed-desorbed and biodegraded to remove, and the gas and liquid generated by aeration are collected to the center under the negative pressure action of the multi-phase extraction well 17 at the center and enter the multi-phase extraction well 17 through the perforated pipe segment 8; the gas-liquid mixture entering the multiphase extraction well 17 enters a gas-liquid separator 11 under the power action provided by a vacuum pump 13, and the separated gas is exhausted through an exhaust chimney 15 after reaching the standard through the adsorption of an activated carbon adsorption box 14; the separated sewage enters a sewage treatment device 12 for treatment, a water pump 18 arranged in a multiphase extraction well 17 also sends polluted underground water into the sewage treatment device 12, and the polluted underground water is injected into the underground water through an underground water reinjection well after reaching the standard after treatment so as to supplement the underground water;
wherein, a monitoring well 19 can be arranged in the polluted site so as to monitor the pollutant content in the underground water and the change of various parameters (pressure and temperature) at any time, and to cooperate with aeration and extraction work.
In the above embodiment, the aeration system, the multiphase extraction system, the internal pipelines of the pollutant treatment system and the pipelines among the systems all adopt PVC pipes.
In the above embodiment, the depth of the electromagnetic valve 6 and the aeration head 7 can be set according to the site pollution, and the length of the perforated pipe segment 8 at the position of the aeration head 7 is 20-100 cm.
In the above embodiment, the diameter of the sieve hole of the pipe section 8 is 2-3 mm, and the pipe section 8 is wound by using a screen to prevent the sieve hole from being blocked.
The following embodiments of the present invention will be described in detail with reference to practical engineering:
site pollution condition:
the total field is 360m2The underground water level is 4m, the maximum pollution depth is 14m, and the underground water pollution device is composed of the following structures:
powdery clay layer: vertical permeability coefficient: 5.80E-03 (m/d); horizontal permeability coefficient: 6.70E-03 (m/d);
fine silt layer: vertical permeability coefficient: 0.6 (m/d); horizontal permeability coefficient: 0.6 (m/d);
powdery clay layer: vertical permeability coefficient: 2.50E-03 (m/d); horizontal permeability coefficient: 4.50E-03 (m/d).
Table 1: situation of site contamination
| Depth of contamination | Soil layer | The kind of contaminant | ||
| 0～2m | Artificial fill | Benzene, ethylbenzene, 1, 2-dichloropropane and 1,2, 3- |
||
| 2～4m | Fine clay layer | Benzene, ethylbenzene, 1,2, 3-trichloropropane | ||
| 4～10m | Fine silt layer | Benzene, ethylbenzene, 1,2, 3-trichloropropane | ||
| 10～14m | Fine | Benzene | 1,2, 3-trichloropropane |
Wherein the maximum content of benzene in the soil is 16.8mg/kg, the maximum content of 1, 2-dichloropropane is 168mg/kg, the maximum content of 1,2, 3-trichloropropane is 281mg/kg, and the content of ethylbenzene is 30.5 mg/kg; the maximum content of benzene in the groundwater is 358ug/L, the maximum content of ethylbenzene is 243ug/L, and the maximum content of 1,2, 3-trichloropropane is 485 ug/L.
The specific implementation scheme is as follows:
depth of aeration well15m, bottom sealing, three groups of aeration heads arranged in the well, an air compressor connected with the aeration heads, a No. 1 aeration head with depth of 4m, a No. 2 aeration head with depth of 10m, and a No. 3 aeration head with depth of 14 m. The three aeration heads are respectively connected with the electromagnetic valve, the length of a sieve pore opened at the position of each aeration head is 50cm, and the pore diameter of the sieve pore is 2 mm. The pipe orifice of the aeration well is fixedly sealed by a flange and a silica gel cushion, the aeration heads are respectively aerated in the sequence of 3-2-1, the aeration time of each aeration head is 1h, the aeration time per day is 12h, and the aeration flow of each aeration head is 7.5m3H is used as the reference value. The mouth of the multiphase extraction well is connected with a vacuum pump, the vacuum degree is set to be-0.10 MPa, the well depth is set to be 15m, the extraction well is screened at the position of 4-14m, the screening length is 10m, and the aperture of a sieve pore is 2 mm. The submersible pump goes deep into the bottom of the well to control the underground water level of the field by 8m, the pumped sewage enters a sewage treatment device, Fenton oxidation treatment is adopted, and the sewage is injected into the ground through a reinjection well after being treated. The distance between the extraction well and the aeration well is 6m, a group of extraction wells is combined with 5 groups of aeration wells, and 2 groups are distributed in the whole field. The system continuously operates for 2 weeks, the content of each pollutant is lower than a restoration target value, and the content of dissolved oxygen in the underground water is continuously monitored to reach 4.6mg/L, so that the system is beneficial to the growth of subsequent microorganisms.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A volatile organic pollution place repair system, comprising: controllable aeration system, heterogeneous extraction system and pollutant processing system, wherein:
the controllable aeration system mainly comprises a plurality of aeration wells, wherein pipe orifices at the bottoms and the tops of the aeration wells are sealed, a plurality of aeration heads are arranged in different depth areas in the aeration wells, each aeration well is provided with a perforated pipe section with sieve pores on the surface corresponding to each aeration head, the aeration heads are connected to an air compressor on the ground through electromagnetic valves, and the electromagnetic valves are connected with a central control system and can be controlled to be opened for work in sequence;
the multiphase extraction system comprises multiphase extraction wells arranged at the center positions of the aeration wells, the bottom and top pipe orifices of the multiphase extraction wells are sealed, and the multiphase extraction wells are also provided with perforated pipe sections with sieve holes on the surfaces at the underground parts;
the pollutant treatment system can extract and treat the waste gas and the waste water in the multiphase extraction system.
2. The voc contaminated site remediation system of claim 1, wherein: the pollutant treatment system comprises a water pump arranged at the bottom of the multiphase extraction well and a vacuum pump communicated with the multiphase extraction well, the water pump is connected with an overground sewage treatment device, the vacuum pump is connected with the multiphase extraction well through a gas-liquid separator, and a liquid phase pipeline of the gas-liquid separator is communicated to the sewage treatment device.
3. The voc contaminated site remediation system of claim 1, wherein: 3-6 multiphase extraction wells are distributed around each aeration well, the distance between each aeration well and each extraction well is 3-8 m, the well depths of the aeration wells and the multiphase extraction wells are all larger than the depth of a polluted stratum, and top pipe orifices of the aeration wells and the multiphase extraction wells are sealed by flanges and silica gel pads.
4. The voc contaminated site remediation system of claim 1, wherein: a pressure stabilizing valve, a pressure gauge and a flowmeter are further arranged on a pipeline between the air compressor and the aeration well, the gas injection pressure is 0.05-0.08 MPa, and the gas injection flow is 5-7 m3/h。
5. The voc contaminated site remediation system of claim 2, wherein: and qualified water after being treated by the sewage treatment device is connected with the recharging well.
6. The voc contaminated site remediation system of claim 2, wherein: and the downstream of the vacuum pump is connected with an activated carbon adsorption box and an exhaust chimney.
7. The voc contaminated site remediation system of claim 2, wherein: a negative pressure gauge is arranged at the wellhead of the multiphase extraction well, the required extraction pressure is-0.05 to-0.08 MPa, and the pumping flow is 0.5 to 1.0m3/d。
8. The voc contaminated site remediation system of claim 1, wherein: the aeration system, the multiphase extraction system, the internal pipeline of the pollutant treatment system and the pipeline among the systems all adopt PVC pipes.
9. The voc contaminated site remediation system of claim 1, wherein: the number of the aeration heads is 2-5, and the length of the flower pipe section at the position of the aeration heads is 20-100 cm.
10. The voc contaminated site remediation system of claim 1, wherein: the diameter of a sieve pore of the flower pipe section is 2-3 mm; and the periphery of the perforated pipe section is wound by adopting a screen.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111282979A (en) * | 2020-03-03 | 2020-06-16 | 中科鼎实环境工程有限公司 | A volatile organic pollution site remediation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111282979A (en) * | 2020-03-03 | 2020-06-16 | 中科鼎实环境工程有限公司 | A volatile organic pollution site remediation system |
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