CN212042011U - Composite contaminated soil remediation device - Google Patents
Composite contaminated soil remediation device Download PDFInfo
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- CN212042011U CN212042011U CN202020658313.7U CN202020658313U CN212042011U CN 212042011 U CN212042011 U CN 212042011U CN 202020658313 U CN202020658313 U CN 202020658313U CN 212042011 U CN212042011 U CN 212042011U
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- 239000002689 soil Substances 0.000 title claims abstract description 92
- 238000005067 remediation Methods 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 230000005855 radiation Effects 0.000 claims abstract description 16
- 239000007921 spray Substances 0.000 claims abstract description 10
- 238000002386 leaching Methods 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 10
- 239000005416 organic matter Substances 0.000 abstract description 7
- 238000007664 blowing Methods 0.000 abstract description 5
- 239000010815 organic waste Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 230000008439 repair process Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000010949 copper Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000008139 complexing agent Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920001661 Chitosan Polymers 0.000 description 2
- 238000003321 atomic absorption spectrophotometry Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a composite contaminated soil remediation device; the device comprises a cylinder, a feed hopper at the upper end of the cylinder and a discharge outlet at the lower end of the cylinder; the upper end of the cylinder body is provided with a supporting shaft, the supporting shaft is provided with a connecting device in driving connection with a rotating shaft, and the rotating shaft is vertically arranged in the middle of the cylinder body; a first crushing knife, a second crushing knife and a high-pressure spray head are arranged outside the rotating shaft from top to bottom, and a compressed air inlet is arranged on the side surface of the cylinder between the first crushing knife and the second crushing knife; a stirring shaft and a crushing shaft are arranged in the barrel below the high-pressure spray head; an infrared radiation device is arranged at the periphery of the discharge port. The utility model separates most organic waste in the polluted soil after primary crushing from the soil through compressed air blowing treatment; after the repairing agent is sprayed, the stirring shaft drives the repairing agent to fully contact with the soil; then, the soil re-bonded by the repairing agent is broken by a scraper on a breaking shaft, so that the organic matter treatment efficiency of subsequent infrared radiation is improved; finally, the organic matter and the heavy metal can be efficiently repaired at the same time.
Description
Technical Field
The utility model relates to a pollute soil processing technique, concretely relates to combined pollution soil prosthetic devices.
Background
With the rapid development of urban industrialization, urban soil, underground water industry and agricultural pollution are gradually serious, soil structure and ecological environment are seriously damaged, underground water quality is deteriorated, agricultural production is affected due to transportation, and great threat is brought to human beings and ecological environment, so that soil remediation is an important task to be solved urgently at present. The polluted soil is repaired by various methods, mainly including physical repair, chemical repair, biological repair and the like. The soil leaching technology is one of the important technical means of chemical remediation methods, can be used for remedying heavy metal contaminated soil and organic matter contaminated soil, and is concerned with the technology. However, the remediation of the polluted soil by manually spraying the remediation agent has the defects of poor remediation effect, low remediation efficiency and the like. Therefore, the method which is frequently used at present is to dig out the soil, treat the soil by a soil treatment device and backfill the soil.
The pollution in the soil is not a single pollutant but a compound pollution with multiple pollution coexisting, and particularly in an area with common industrial development, the pollution of heavy metals and organic matters is widely existed in the soil. Some existing soil treatment devices often focus on heavy metal pollution treatment or organic matter pollution treatment, and efficient repair of heavy metal/organic matter pollution is difficult to achieve.
In conclusion, it is necessary to develop and design a composite contaminated soil remediation device with good remediation effect and high remediation efficiency. In particular to a composite polluted soil restoration treatment device which has good restoration effect on the composite pollution of heavy metals/organic matters and high restoration efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a combined pollution soil prosthetic devices.
The purpose of the utility model is realized through the following technical scheme:
the utility model relates to a composite contaminated soil remediation device, which comprises a barrel body 1, a feed hopper 2 at the upper end of the barrel body 1, and a discharge port 3 at the lower end of the barrel body 1;
the upper end of the cylinder body is provided with a support shaft 4, the support shaft 4 is provided with a connecting device 5 in driving connection with a rotating shaft 6, and the rotating shaft 6 is vertically arranged in the middle of the cylinder body 1;
a first crushing knife 8 and a second crushing knife 9 are arranged outside the rotating shaft 6 from top to bottom; a compressed air inlet 10 is arranged on the side surface of the cylinder body 1 between the first crushing knife 8 and the second crushing knife 9;
a sleeve 11 is arranged outside the rotating shaft 6, a leaching channel 12 is formed between an inner hole of the sleeve 11 and the rotating shaft 6, a pipeline connected with the leaching channel 12 is arranged on the connecting device 5, and the pipeline is connected with a repairing agent conveying device 13; a plurality of high-pressure spray headers 14 connected with the leaching channel 12 are axially arranged on the sections of the rotating shaft 6 below the second crushing cutter 9;
a stirring shaft 15 and a crushing shaft 17 which are parallel to the bottom of the cylinder body are arranged in the space below the high-pressure spray header 14 in the cylinder body 1; a scraper 18 is arranged on the periphery of the crushing shaft 17 along the radial direction, and the crushing shaft 17 is positioned below the stirring shaft 15;
and an infrared radiation device 19 is arranged on the periphery of the discharge port 3.
As an embodiment of the utility model, connecting device 5 is located in the middle of feeder hopper 2, and connecting device 5 is kept apart through division board 7 with the feeding space of feeder hopper 2.
As an embodiment of the present invention, the isolation plate 7 is annular or square.
As an embodiment of the present invention, a pair of compressed air inlets 10 is oppositely disposed on the side surface of the cylinder (1) between the first crushing blade 8 and the second crushing blade 9.
In one embodiment of the present invention, the stirring shaft 15 surrounds the spiral belt 16 at its outer periphery.
As an embodiment of the present invention, the cutting edge of the scraper 18 is parallel to the central axis of the crushing shaft 17.
As an embodiment of the present invention, a plurality of scrapers 18 are uniformly distributed along the circumference of the crushing shaft 17.
As an embodiment of the utility model, discharge gate 3 is equipped with the gas vent, the gas vent is linked together through draught fan 20 and chimney 21.
As an embodiment of the utility model, discharge gate 3 is equipped with the gas vent, the gas vent is linked together with the catalytic absorption tower through draught fan 20.
As an embodiment of the present invention, the end of the cylinder 1 near the discharge hole 3 is in the shape of an inverted round table.
As an embodiment of the present invention, the bottom of the discharge port 3 is provided with a movable baffle 22. After the remediation is complete, the flap 22 is opened and the soil falls to a collection bin 23.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. compressed air is adopted for blowing treatment, most of organic waste in the polluted soil which is primarily crushed by the first crushing knife is separated from the soil, the contact area of the organic waste and the repairing agent in the subsequent leaching process is increased, and the repairing effect is improved;
2. the soil sprayed by the repairing agent is stirred by a stirring shaft, and the repairing agent is driven by a spiral belt arranged on the soil to be in full contact with the polluted soil;
3. the soil re-bonded by the repairing agent is broken by the scraper arranged on the periphery of the breaking shaft, so that the organic matter treatment efficiency of subsequent infrared radiation is improved;
4. carrying out infrared radiation on the repaired soil through an infrared radiation device, and further removing residual organic matters in the polluted soil; finally, the simultaneous high-efficiency repair of organic matters and heavy metals is realized;
5. the utility model discloses a combined pollution soil prosthetic devices compact structure, area is little, and repair efficiency is high, use cost is low.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of a composite contaminated soil remediation device;
the device comprises a barrel 1, a feed hopper 2, a discharge port 3, a support shaft 4, a connecting device 5, a rotating shaft 6, a partition plate 7, a first crushing cutter 8, a second crushing cutter 9, a compressed air inlet 10, a sleeve 11, a leaching channel 12, a repairing agent conveying device 13, a high-pressure spray head 14, a stirring shaft 15 and a spiral belt 16. 17 is a crushing shaft, 18 is a scraper, 19 is an infrared radiation device, 20 is a draught fan, 21 is a chimney, 22 is a movable baffle plate, and 23 is a material collecting box.
Detailed Description
The present invention will be described in detail with reference to the following examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that numerous modifications and improvements can be made by those skilled in the art without departing from the inventive concepts herein. These all belong to the protection scope of the present invention.
Examples
The composite contaminated soil remediation device shown in fig. 1 mainly comprises a cylinder body 1, a feed hopper 2 at the upper end of the cylinder body, and a discharge port 3 at the lower end of the cylinder body.
The barrel upper end is equipped with back shaft 4, installs on the back shaft to drive connecting device 5 who connects with axis of rotation 6, the axis of rotation 6 is located the barrel 1 perpendicularly in the middle of, connecting device 5 is located feeder hopper 2 in the middle of, and connecting device 5 and feeder hopper 2's feed space pass through annular division board 7 and keep apart.
A first crushing knife 8 and a second crushing knife 9 are arranged outside the rotating shaft 6 from top to bottom; a compressed air inlet 10 is arranged on the side surface of the cylinder body between the first crushing knife 8 and the second crushing knife 9; preferably, a pair of compressed air inlets are provided on opposite sides of the barrel. The embodiment adopts compressed air blowing treatment, can separate most organic waste in the polluted soil after being primarily crushed by the first crushing cutter from the soil, increases the contact area of the organic waste and the repairing agent in the subsequent leaching process, and improves the repairing effect.
A sleeve 11 is arranged outside the rotating shaft 6, a leaching channel 12 is formed between an inner hole of the sleeve 11 and the rotating shaft 6, a pipeline connected with the leaching channel 12 is arranged on the connecting device 5, and the pipeline is connected with a repairing agent conveying device 13; a plurality of high-pressure spray headers 14 connected with the leaching channel 12 are axially arranged on the rotating shaft 6 below the second crushing cutter 9.
A stirring shaft 15 and a crushing shaft 17 which are parallel to the bottom of the cylinder body are arranged in the space below the high-pressure spray header 14 in the cylinder body 1; the crushing shaft 17 is positioned below the stirring shaft 15.
The peripheral of stirring shaft 15 is around the helical ribbon 16, and stirring shaft 15's stirring makes the contact of repairing agent and contaminated soil more abundant, and this is the utility model discloses improve one of repairing agent repair efficiency's key process.
An infrared radiation device 19 is arranged on the periphery of the discharge port 3 at the lower end of the cylinder body 1, and is used for carrying out infrared radiation on the repaired soil and further removing residual organic matters in the polluted soil. The radiation infrared penetrates into the soil, the organic matters adsorbed by the soil are blown off by heating, and because the organic matters are repaired in the prior art, the residual organic matters in the soil are not large, the concentration of the VOC gas generated in the process is not high, and the VOC gas can be directly pumped to a chimney 21 by an induced draft fan 20 to be discharged.
The bottom of the discharge port 3 is provided with a movable baffle 22. After the infrared radiation treatment is finished, the movable baffle 22 of the discharge port 3 is opened, the treated soil falls into a material collecting box 23 through the discharge port 3, and the soil is transported back for soil backfilling.
The choice of remediation agent depends on the type of contaminant, the degree of contamination, etc. Firstly, investigating the polluted soil of a polluted site, setting a sampling scheme, sampling the polluted soil, and determining the types and the pollution degrees of heavy metal pollutants and organic pollutants in the site according to the analysis and monitoring results; then different types and concentrations of the eluting agent are selected according to the types of the heavy metal pollutants, the types of the organic pollutants, the pollution degree and the soil property. For example, for the soil containing Cd, Cu, Pb or Zn, the soil can be leached by an organic complexing agent EDTA with the concentration of 0.04-0.06 mol/L and citric acid with the concentration of 0.1-0.3 mol/L; leaching the soil containing mercury by adopting an organic complexing agent EDTA with the concentration of 0.2-0.3mol/L, oxalic acid with the concentration of 0.15-0.23mol/L and 0.1-0.25mol/LKI solution in sequence; for soil containing Cu, Zn, Cd or Cr and organic matters, 5000-8000 mg/L N-lauroyl ED3A solution and 200-300 mg/L chitosan solution can be adopted for leaching.
When the composite contaminated soil remediation device works, the driving device drives the rotating shaft to rotate, and the first crushing cutter cuts and crushes the soil falling from the feed hopper; at the moment, compressed air is introduced into the cylinder body to carry out air blowing treatment on the crushed soil, so that most of organic matters in the polluted soil are separated; the soil after air blowing treatment is crushed by a second crushing knife, so that the contact area of organic matters, heavy metals and the repairing agent is further increased; the repairing agent is sprayed out by the spray header and permeates into the soil; the external driving device drives the stirring shaft and the crushing shaft, the spiral belt on the stirring shaft further enables the repairing agent to be mixed with the soil more uniformly in a spiral mode, the crushing shaft also plays a role in stirring, and meanwhile, part of soil which is newly bonded by the repairing agent is refined, so that the subsequent infrared treatment efficiency is improved; the barrel below the crushing shaft is in an inverted round table shape, the crushed wet soil slides to a discharge port under the action of gravity, and infrared radiation is carried out on the repaired soil through an infrared radiation device arranged on the periphery of the discharge port so as to further remove residual organic matters in the polluted soil; VOC gas generated at the discharge port is pumped to a chimney by an induced draft fan to be discharged; or pumping to a catalytic absorption tower for treatment; after the infrared radiation treatment is finished, opening a movable baffle plate of the discharge port, enabling the treated soil to fall into a collection box through the discharge port, and transporting back to carry out soil backfilling.
Application example: the contaminated soil near a certain chemical plant contains 99.9 mg/kg Pb, 13 mg/kg Cu, 4.50 mg/kg Cd, and 13.1 mg/kg petroleum hydrocarbon. The composite contaminated soil remediation device of the embodiment is adopted for treatment. The repairing agent selects 0.08mol/L organic complexing agent EDTA and 200mg/L chitosan solution with the volume ratio of 5:1, the water-soil ratio is more than 3:1, and soil sample detection is carried out after treatment. Measuring copper in the soil sample according to flame atomic absorption spectrophotometry (GB/T17138); measuring lead and cadmium according to graphite furnace atomic absorption spectrophotometry (GB/T17141); determining petroleum hydrocarbons using gas chromatography-mass spectrometry (HJ 805); the detection result is as follows: the Pb content is 25.8mg/kg, the Cu content is 2.2mg/kg, the Cd content is 0.25mg/kg, and the petroleum hydrocarbon content is 1.3 mg/kg; the repaired soil almost meets all the requirements of the current soil repair standard. Therefore, the utility model discloses a combined pollution soil prosthetic devices can satisfy the better, higher needs of remediation efficiency of contaminated soil remediation effect.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. The composite contaminated soil remediation device is characterized by comprising a cylinder (1), a feed hopper (2) at the upper end of the cylinder (1), and a discharge hole (3) at the lower end of the cylinder (1);
the upper end of the cylinder body is provided with a support shaft (4), the support shaft (4) is provided with a connecting device (5) which is in driving connection with a rotating shaft (6), and the rotating shaft (6) is vertically arranged in the middle of the cylinder body (1);
a first crushing knife (8) and a second crushing knife (9) are arranged outside the rotating shaft (6) from top to bottom; a compressed air inlet (10) is formed in the side face of the cylinder body (1) between the first crushing knife (8) and the second crushing knife (9);
a sleeve (11) is arranged outside the rotating shaft (6), a leaching channel (12) is formed between an inner hole of the sleeve (11) and the rotating shaft (6), a pipeline connected with the leaching channel (12) is arranged on the connecting device (5), and the pipeline is connected with a repairing agent conveying device (13); a plurality of high-pressure spray headers (14) connected with the leaching channel (12) are axially arranged on the section of the rotating shaft (6) below the second crushing knife (9);
a stirring shaft (15) and a crushing shaft (17) which are parallel to the bottom of the cylinder body (1) are arranged in the space below the high-pressure spray header (14) in the cylinder body (1); the periphery of the smashing shaft (17) is provided with a scraper (18) along the radial direction, and the smashing shaft (17) is positioned below the stirring shaft (15);
and an infrared radiation device (19) is arranged on the periphery of the discharge hole (3).
2. Composite contaminated soil remediation device according to claim 1, wherein the connection means (5) is located in the middle of the feed hopper (2), the connection means (5) being isolated from the feeding space of the feed hopper (2) by an isolation plate (7).
3. The composite contaminated soil remediation device of claim 2, wherein said spacer plate (7) is annular or square.
4. The composite contaminated soil remediation device of claim 1, wherein a pair of compressed air inlets (10) are provided oppositely on the side of the cylinder (1) between the first crushing blade (8) and the second crushing blade (9).
5. The composite contaminated soil remediation device of claim 1, wherein the outer circumference of said agitator shaft (15) surrounds a helical band (16).
6. The composite contaminated soil remediation device of claim 1, wherein the cutting edge of said scraper (18) is parallel to the central axis of said shatter shaft (17).
7. The combined contaminated soil remediation device of claim 1, wherein a plurality of scrapers (18) are circumferentially and evenly distributed around the periphery of the crushing shaft (17).
8. The composite contaminated soil remediation device of claim 1, wherein the discharge outlet (3) is provided with an exhaust port, and the exhaust port is communicated with a chimney (21) through an induced draft fan (20).
9. The composite contaminated soil remediation device of claim 1, wherein the discharge port (3) is provided with an exhaust port, and the exhaust port is communicated with the catalytic absorption tower through an induced draft fan (20).
10. The composite contaminated soil remediation device of claim 1, wherein the end of the cylinder (1) adjacent to the discharge outlet (3) is in the shape of an inverted circular truncated cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020658313.7U CN212042011U (en) | 2020-04-27 | 2020-04-27 | Composite contaminated soil remediation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020658313.7U CN212042011U (en) | 2020-04-27 | 2020-04-27 | Composite contaminated soil remediation device |
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| Publication Number | Publication Date |
|---|---|
| CN212042011U true CN212042011U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020658313.7U Active CN212042011U (en) | 2020-04-27 | 2020-04-27 | Composite contaminated soil remediation device |
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| Country | Link |
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| CN (1) | CN212042011U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058986A (en) * | 2021-03-16 | 2021-07-02 | 广东省润土环境治理有限公司 | Composite soil repairing device |
| CN115254932A (en) * | 2022-05-16 | 2022-11-01 | 四川省分析测试服务中心(四川省科学仪器协作共用服务中心) | Soil mercury pollution remediation device and method |
-
2020
- 2020-04-27 CN CN202020658313.7U patent/CN212042011U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058986A (en) * | 2021-03-16 | 2021-07-02 | 广东省润土环境治理有限公司 | Composite soil repairing device |
| CN113058986B (en) * | 2021-03-16 | 2021-10-22 | 广东省润土环境治理有限公司 | Composite soil repairing device |
| CN115254932A (en) * | 2022-05-16 | 2022-11-01 | 四川省分析测试服务中心(四川省科学仪器协作共用服务中心) | Soil mercury pollution remediation device and method |
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