CN113275376A - Device and method for repairing polluted soft clay - Google Patents
Device and method for repairing polluted soft clay Download PDFInfo
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- CN113275376A CN113275376A CN202110702180.8A CN202110702180A CN113275376A CN 113275376 A CN113275376 A CN 113275376A CN 202110702180 A CN202110702180 A CN 202110702180A CN 113275376 A CN113275376 A CN 113275376A
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- 239000004927 clay Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 44
- 231100000719 pollutant Toxicity 0.000 claims abstract description 44
- 239000003792 electrolyte Substances 0.000 claims abstract description 24
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 22
- 239000002689 soil Substances 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 12
- 238000000605 extraction Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000005067 remediation Methods 0.000 claims description 7
- 239000003153 chemical reaction reagent Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 239000000356 contaminant Substances 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 4
- 230000008439 repair process Effects 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000008139 complexing agent Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 238000003491 array Methods 0.000 claims description 2
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- 235000005985 organic acids Nutrition 0.000 claims 1
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- 230000009286 beneficial effect Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011899 heat drying method Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 230000005684 electric field Effects 0.000 description 1
- 238000009393 electroremediation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
本发明公开了一种修复污染软黏土的装置，包括电极室、导电系统和污染物提取系统；所述电极室设置为单个筒体或由多个筒体嵌套组成，其中，多个筒体嵌套组成的电极室中最外层筒体一端设置有支架盖，所述支架盖上布置有电极孔；所述导电系统包括多个电极和直流电源，所述电极通过导线连接在直流电源的两端，所述电极竖直设置且穿过支架盖的电极孔延伸至电极室的电解液中，所述电极均不与土体直接接触；所述污染物提取系统包括储液瓶、蠕动泵和污染物净化器；本发明还公开了修复污染软黏土的方法，本发明的装置结构简单，操作方便，可以自动定时停机、启动和定时定量的调整电解液体积，提高工作效率，更加智能。
The invention discloses a device for repairing polluted soft clay, comprising an electrode chamber, a conductive system and a pollutant extraction system; the electrode chamber is configured as a single cylinder or is composed of a plurality of cylinders nested, wherein the multiple cylinders are In the electrode chamber formed by nesting, one end of the outermost cylinder body is provided with a bracket cover, and electrode holes are arranged on the bracket cover; the conductive system includes a plurality of electrodes and a DC power supply, and the electrodes are connected to the DC power supply through wires. At both ends, the electrodes are vertically arranged and extend into the electrolyte in the electrode chamber through the electrode holes of the bracket cover, and the electrodes are not in direct contact with the soil; the pollutant extraction system includes a liquid storage bottle and a peristaltic pump and a pollutant purifier; the invention also discloses a method for repairing polluted soft clay. The device of the invention is simple in structure and convenient in operation, and can automatically stop, start, and quantitatively adjust the volume of electrolyte at regular intervals, thereby improving work efficiency and being more intelligent.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a device and a method for repairing polluted soft clay.
Background
In areas with developed economy, dense population and frequent industrial and agricultural production activities, wastes produced in industrial production permeate into soil layers due to unorganized discharge or failure of discharge systems, so that physical, mechanical and chemical properties of the soil are changed, engineering activities are directly influenced, or the wastes are harmful to human health, animal reproduction and plant growth. The polluted soil inevitably meets soft clay and is polluted by different types, such as nitrogen and phosphorus nutrient salt pollution, heavy metal pollution, organic matter pollution, compound pollution and the like. The polluted soft clay has the characteristics of high water content, low permeability, fine particles, large specific surface area and the like, and pollutants such as heavy metals have great influence on the engineering performance of the soil body through ion exchange, the thickness change of an electric double layer and the dissolution and corrosion of cementing materials among particles, so that the compactness and the strength of the soil body are further reduced, the cementing force among soil particles is reduced, and the loss of beneficial minerals is accelerated.
The pollution soft clay is subjected to harmless treatment and then is recycled, so that the environment can be protected, the resources can be saved, and the method is one of the hot subjects of the current domestic and foreign researches. The existing treatment technology of the polluted soft clay comprises a solidification method, a heat drying method, an incineration method, a biological method, an electric remediation method and the like, wherein the solidification method is the most common stable technology, but when the external environment changes, pollutants are still released and the environment pollution is possibly caused, the heat drying method and the incineration method have large damage to the soil body property, the investment cost is high, and the composting and bioremediation method consumes long time. The electric restoration technology can enable pollutants to migrate under the action of a direct current electric field to achieve the purpose of removal, reduce the environmental risk caused by post-treatment of the polluted soft clay, and meet the requirement of resource utilization of the polluted soft clay. However, the conventional electric remediation technology for contaminated soil is usually developed in an indoor model test, wherein electrolyte chambers are arranged at two ends of a soil body, and electrodes are put into electrolyte and connected with a direct current power supply through a lead, so that the purpose of conducting ions through the electrolyte is achieved. However, this indoor implementation of electro-kinetic remediation techniques is difficult to apply to actual projects in the field. Therefore, the electric repairing technology needs to be innovative to realize the on-site in-situ repairing of the polluted soft clay.
Disclosure of Invention
The present invention provides a device for repairing contaminated soft clay and a repairing method thereof, so as to solve the defects or problems in the background art.
In order to achieve the above object, an embodiment of the present invention provides an apparatus for repairing contaminated soft clay, which is characterized in that the apparatus comprises an electrode chamber, a conductive system and a contaminant extraction system;
the electrode chamber is arranged into a single cylinder or formed by nesting a plurality of cylinders, wherein one end of the outermost cylinder in the electrode chamber formed by nesting the plurality of cylinders is provided with a bracket cover, and the bracket cover is provided with an electrode hole;
the conductive system comprises a plurality of electrodes and a direct-current power supply, the electrodes are vertically arranged and extend into electrolyte of the electrode chamber after penetrating through electrode holes of the support cover, and the electrodes are not in direct contact with soil body;
the pollutant extraction system comprises a liquid storage bottle, a peristaltic pump and a pollutant purifier; the liquid storage bottle is connected with a peristaltic pump or a pollutant purifier through a hose, and the peristaltic pump or the pollutant purifier is connected with an electrode chamber through a hose.
In a further embodiment of the present invention, the holder cover is provided with a hose hole, one end of the hose enters the electrode chamber through the hose hole on the holder cover, and the other end of the hose is connected with the peristaltic pump, the pollutant purifier or the liquid storage bottle.
In a further embodiment of the invention, one side of the electrode chamber of a single cylinder is provided with an upper nozzle, one end of the hose is connected with the electrode chamber through the upper nozzle, and the other end of the hose is connected with a peristaltic pump, a pollutant purifier or a liquid storage bottle.
In a further embodiment of the invention, the electrode chamber at least comprises an innermost barrel and an outermost barrel, wherein the height of the innermost barrel is 1.2-1.5 times of that of the other barrels, the electrode chamber can be used for sequentially unfolding the nested barrels through lifting, and the two adjacent unfolded barrels are fixedly connected through a buckle at the end part.
In a further embodiment of the invention, the support cover is provided with internal threads which can be connected with external threads of the port of the cylinder at the outermost layer of the electrode chamber, and the electrode holes on the support cover are supported by 4 skeletons.
In a further embodiment of the invention, said electrodes are fixed in the electrode compartment by means of a holder cover, and said electrodes in the field may be arranged in the form of a rectangle, a ring or a quincunx.
In a further embodiment of the invention, a water level sensor is arranged in the electrode chamber, the water level sensor is used for monitoring the water level of the electrode chamber and sending a water level signal to the controller, and the water level sensor and the controller are matched for controlling the peristaltic pump and the pollution purifier to automatically operate.
The embodiment of the invention also provides a method for repairing polluted soft clay by adopting the device for repairing polluted soft clay, which is characterized by comprising the following steps:
s1, vertically pressing the innermost barrel of the electrode chamber exceeding the length parts of other barrels into the polluted soft clay according to the design requirement, and putting the cleaned sand into the bottom of the electrode chamber to be 3-5 cm thick;
s2, screwing the bracket cover with the port of the barrel body on the outermost layer of the electrode chamber, feeding the electrode into the electrode chamber through the electrode hole of the bracket cover, wherein the electrode is not contacted with the soil body in the electrode chamber, fixing the electrode on the central axis of the electrode chamber by adjusting the framework of the bracket cover, and connecting the electrode with a direct current power supply through a lead as required;
s3, one end of the hose is sent to a preset position of the electrode chamber through a hose hole of the support cover, electrolyte is injected into the electrode chamber to a required scale according to design requirements, a direct-current power supply is started to be electrified, and the polluted soft clay is repaired; if the water level in the electrode chamber monitored by the water level sensor is higher than the set value, connecting the hose of the electrode chamber with a peristaltic pump or a pollutant purifier according to the type of pollutants, controlling the operation of the peristaltic pump or the pollutant purifier, and recovering electrolyte in the electrode chamber through the pollutant purifier when the content of the pollutants in the pollutant purifier is low;
s4, lifting the second layer of the nested cylinder from inside to outside upwards to enable the bottom of the second layer of the nested cylinder to be fixedly connected with the upper port of the innermost layer of the nested cylinder through a buckle, and manually or mechanically pressing down an electrode chamber to repair the deeper layer of the polluted soft clay by adopting the method;
and S5, repeating the polluted soft clay repairing treatment steps to finally realize the treatment of the polluted soft clay.
Further, in the step S2, the electrodes of different arrays are connected by wires according to the arrangement of the electrodes, and then alternately connected to the positive electrode or the negative electrode of the dc power supply, so as to realize the circular progressive energization.
Further, the electrolyte used in step S3 is a chemical reagent for assisting in the precipitation of the contaminants, and the chemical reagent includes a small molecule organic acid, a surfactant and a complexing agent
The technical scheme of the invention has the following beneficial effects: the core of the device for repairing the polluted soft clay is an electrode chamber, the electrode chamber is internally provided with electrolyte containing chemical reagents which are beneficial to separating out pollutants, and the electrode chamber is electrified by the conductive system for repairing through a plurality of nested cylinders or a single cylinder, a support cover, the conductive system and a pollutant extraction system, so that the repairing and treatment of the polluted soft clay are realized, the problem that the existing polluted soil electric repairing technology stays in an indoor experimental study and is difficult to apply to an actual field project is solved, and the basic research results are promoted to be applied. According to the invention, the electrode chamber formed by the nested cylinders is adopted, and the depth is continuously added into the polluted soft clay by the electrode arranged above the ground surface, so that the remediation efficiency of the polluted soft clay is improved. In addition, the invention has simple structure and convenient operation, can automatically and regularly stop, start and regularly and quantitatively adjust the volume of the electrolyte, improves the working efficiency and is more intelligent.
Drawings
Fig. 1 is a schematic view of repairing contaminated soft clay according to embodiment 1 of the present invention.
FIG. 2 is a schematic view showing an initial structure of an electrode chamber in example 1 of the present invention.
Fig. 3 is a schematic structural view of the electrode chamber after being pulled up in example 1 of the present invention.
Fig. 4 is a schematic top view of the electrode chamber in example 1 of the present invention.
Fig. 5 is a schematic structural view of a holder cover in embodiment 1 of the present invention.
Fig. 6 is a schematic view of the single barrel electrode chamber for repairing contaminated soft clay in example 2 of the present invention.
Fig. 7 is a schematic structural view of a single barrel electrode chamber in embodiment 2 of the present invention.
FIG. 8 is a schematic diagram of a method for repairing contaminated soft clay in a cyclic progression manner according to the present invention.
Fig. 9 is a top view of the present invention adopting a cyclic progressive remediation method of contaminated soft clay.
Description of reference numerals: 1. a direct current power supply; 2. polluting the soft clay; 3. an electrode chamber; 4. a wire; 5. cleaning sand; 6. an electrolyte; 7. an unpowered electrode; 8. electrifying the anode; 9. an energized cathode; 10. a power-on mode; 11. a peristaltic pump; 12. a liquid storage bottle; 13. a hose; 14. a pollutant purifier; 15. a bracket cover; 16. an electrode hole; 17. a hose hole; 18. scale lines; 19. an upper nozzle; 20. an innermost cylinder; 21. and an outermost layer cylinder body.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 to 5, a device for repairing contaminated soft clay comprises an electrode chamber 3 formed by nesting a plurality of barrels, wherein one end of the outermost barrel 21 is screwed with a support cover 15, the support cover 15 is provided with an electrode hole 16 and a hose hole 17, so that the unenergized electrode 7, the energized anode 8, the energized cathode 9 and the hose 13 are conveniently conveyed into the electrode chamber 3, the electrode is fixed by a telescopic framework, the electrode is connected with a direct current power supply 1 through a lead 4, electrolyte 6 is injected into or sucked out of the electrode chamber 3 through a peristaltic pump 11, a contaminant purifier 14, the hose 13, a liquid storage bottle 12 and a water level sensor, and the electrode is placed in the electrolyte 6 of the electrode chamber 3 and is not in direct contact with the contaminated soft clay 2.
The height of the barrel 20 at the innermost layer of the electrode chamber 3 is 1.2-1.5 times of the height of other barrels, the barrels can be unfolded in sequence by lifting, and after the barrels are unfolded, the two adjacent barrels are fixedly connected through a buckle at the end part. The electrode compartments 3 may be arranged in the form of rectangles, rings, rosettes, etc.
In a further embodiment, the electrode chamber 3 is made of PVC, which is very heat resistant even in hot summer, has stability of the main tube, is not easily corroded by sulfur and alkali, and is easy to process, reducing the number of finished products. The hose 13 is a PU pipe with good elasticity and strong toughness.
In a further embodiment, the inner diameter of the innermost cylinder is 100-200 mm, and the wall thickness is 0.2-2 mm; the inner diameter of the hose 13 is 10-40 mm, and the wall thickness is 0.1-2 mm.
Example 2
As shown in fig. 6 and 7, the difference between the embodiment 2 and the embodiment 1 is that when the electrode chamber 3 is a single cylinder, an upper nozzle 19 can be arranged at one end of the cylinder, and the electrode chamber 3 is connected with the peristaltic pump 11 and the pollutant purifier 14 through the upper nozzle 19 and the hose 13.
The device for repairing the polluted soft clay provided by the embodiment 1 of the invention is used for repairing the polluted soft clay, and comprises the following steps:
(1) and vertically pressing the innermost barrel 20 of the electrode chamber 3 exceeding the length parts of other barrels into the polluted soft clay 2 according to the design requirement, and putting the cleaning sand 5 into the bottom of the electrode chamber 3 for 3-5 cm in thickness.
(2) The support cover 15 is screwed with the port of the barrel 21 at the outermost layer of the electrode chamber 3, the electrode is sent into the electrode chamber 3 through the electrode hole 16 of the support cover 15, the electrode is not contacted with the soil body in the electrode chamber 3, the electrode is fixed on the central axis of the electrode chamber 3 by adjusting the framework of the support cover 15, and the electrode is connected with the direct current power supply 1 through the lead 4 according to requirements.
(3) One end of a hose 13 is conveyed into a preset position of an electrode chamber 3 through a hose hole 17 of a support cover 15, electrolyte 6 is injected into the electrode chamber 3 to a certain scale mark 18 according to design requirements, a direct current power supply 1 is started to be electrified, and polluted soft clay is repaired; if the water level in the electrode chamber 3 monitored by the water level sensor is higher than the set value, the hose 13 of the electrode chamber 3 is connected with the peristaltic pump 11 or the pollutant purifier 14 according to the type of the pollutant, and the peristaltic pump 11 or the pollutant purifier 14 is controlled by the controller to operate, when the pollutant content in the pollutant purifier 14 is low, the electrolyte 6 in the electrode chamber 3 is recovered through the pollutant purifier 14, and if the pollutant content is higher than the bearing capacity of the purifier, the electrolyte can be discharged into a specific collection processing device, which is not taken as the protection range of the invention and is not described herein again.
(4) Lifting the second layer of the cylinder body of the nested cylinder body from inside to outside upwards to ensure that the bottom of the second layer of the cylinder body is fixedly connected with the upper port of the innermost layer of the cylinder body through a buckle, and manually or mechanically pressing down an electrode chamber to repair the deeper layer of the polluted soft clay by adopting the method; in this embodiment, the electrode compartment comprises at least an innermost cylinder, a second cylinder and an outermost cylinder.
(5) And repeating the steps of repairing and treating the polluted soft clay, and finally realizing the treatment of the polluted soft clay.
The electrolyte adopted in the step (3) is a chemical reagent which is beneficial to the precipitation of pollutants, such as small molecular organic acid, a surfactant, a complexing agent and the like. When the water level of the electrode chamber 3 corresponding to the anode electrode is lowered to a certain position, the water level sensor transmits a signal to the controller, the controller controls the peristaltic pump 11 to work, so that the electrolyte 6 is added into the electrode chamber 3 through the liquid storage bottle 12, when the electrolyte of the electrode chamber 3 corresponding to the cathode exceeds a certain position, the water level sensor transmits a signal to the controller, the controller controls the pollutant purifier 14 to work, so that the pollutant purifier sucks out and purifies the liquid in the electrode chamber 3 through the hose 13 and then discharges the liquid into the liquid storage bottle 12, and in the embodiment, the pollutant purifier 14 has the function of a pump and can pump the liquid in the electrode chamber 3 into the liquid storage bottle 12.
In the step (2), as shown in fig. 8 and 9, the electrodes and the electrode chambers 3 are annularly arranged, when the number of the electrode rings is 3, the leads of the connecting middle ring and the inner ring are respectively connected with the positive electrode and the negative electrode of the direct current power supply 1, and after the preset electrifying time is reached, the power supply is cut off; then the outer ring and the middle ring electrodes are respectively connected with the anode and the cathode of the direct current power supply 1, and the power supply is cut off after the preset electrifying time is reached; the above two steps are repeated, and the power is circulated in such a way that the power-on mode 10 is as shown by the arrow direction in the figure. When the number of the electrode rings is 4, each ring electrode is connected to a direct current power supply from the inside to the outside to perform cyclic energization in the same manner as the above method. When the number of the electrode rings is 5, the electrodes are similarly circularly electrified, wherein the electrodes at the innermost two rings and the electrodes at the outermost two rings can be electrified simultaneously.
Through the embodiment, the electrode chamber formed by the nested cylinders is adopted, the electrode arranged above the ground surface is continuously added with the depth into the polluted soft clay, the remediation efficiency of the polluted soft clay is improved, the problem that the existing polluted soil electric remediation technology stays in indoor experimental research and is difficult to apply to on-site actual engineering is solved, and the basic research achievement is promoted to be applied.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110702180.8A CN113275376A (en) | 2021-06-24 | 2021-06-24 | Device and method for repairing polluted soft clay |
| PCT/CN2021/104107 WO2022110808A1 (en) | 2021-06-24 | 2021-07-01 | Apparatus for remediation of contaminated soft clay and remediation method for same |
| LU500806A LU500806B1 (en) | 2021-06-24 | 2021-07-01 | Device and method for remedying polluted soft clay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110702180.8A CN113275376A (en) | 2021-06-24 | 2021-06-24 | Device and method for repairing polluted soft clay |
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| CN113275376A true CN113275376A (en) | 2021-08-20 |
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| CN202110702180.8A Pending CN113275376A (en) | 2021-06-24 | 2021-06-24 | Device and method for repairing polluted soft clay |
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| CN (1) | CN113275376A (en) |
| LU (1) | LU500806B1 (en) |
| WO (1) | WO2022110808A1 (en) |
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| CN115477451B (en) * | 2022-08-24 | 2023-08-29 | 长江水利委员会长江科学院 | In-situ electric layering repairing device and method for accurately positioning substrate sludge repairing depth |
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| Publication number | Priority date | Publication date | Assignee | Title |
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- 2021-07-01 WO PCT/CN2021/104107 patent/WO2022110808A1/en active Application Filing
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| WO2022110808A1 (en) | 2022-06-02 |
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