CN110434166B - A double-ring vertical self-cleaning type in-situ dehydration and pollution reduction electric repair device and method - Google Patents
A double-ring vertical self-cleaning type in-situ dehydration and pollution reduction electric repair device and method Download PDFInfo
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 24
- 238000004140 cleaning Methods 0.000 title claims abstract description 22
- 230000018044 dehydration Effects 0.000 title claims abstract description 21
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 21
- 230000008439 repair process Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000009467 reduction Effects 0.000 title claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 170
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- 230000002572 peristaltic effect Effects 0.000 claims abstract description 38
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- 239000003344 environmental pollutant Substances 0.000 claims abstract description 31
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- 229910052751 metal Inorganic materials 0.000 claims description 6
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- 208000005156 Dehydration Diseases 0.000 description 12
- 229910001385 heavy metal Inorganic materials 0.000 description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
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- 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
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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)
- Water Treatment By Electricity Or Magnetism (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
A double-ring vertical self-cleaning type in-situ dehydration pollution-reduction electric repair device and a method thereof are disclosed, the device comprises a pore water collecting ring, a cathode protection liquid releasing ring, a water-guiding insulating anti-blocking cathode, an inert anode, a cathode protection liquid storage pool, a pore water storage pool, a pH sensor, a peristaltic pump and a programmable controller; the cathode protection solution release ring is connected with the pore water collecting ring through a water-conducting insulating anti-blocking cathode, the water-insulating anti-blocking cathode is arranged around the inert anode, a capillary water-conducting filter tube is arranged in the water-insulating anti-blocking cathode, the cathode protection solution release ring is communicated with the pore water collecting ring through the capillary water-conducting filter tube, the pore water collecting ring and the cathode protection solution release ring are connected with a peristaltic pump, and the peristaltic pump is communicated with a pore water storage pool and a cathode protection solution storage pool; and a pH sensor is arranged in the pore water storage pool, and the pH sensor and the peristaltic pump are connected with a programmable controller. The invention can maximally drain pore water and separate pollutants, and reduce electrode blockage and pollutant enrichment in a cathode region.
Description
Technical Field
The invention relates to the field of polluted bottom mud treatment and restoration, in particular to a double-ring vertical self-cleaning type in-situ dehydration pollution-reduction electric restoration device and method.
Background
The bottom mud is an important component of a river and lake water ecological system and mainly comprises inorganic minerals, organic matters and a mobile phase. China has a plurality of rivers and lakes, the rivers and lakes are polluted to different degrees due to human activities such as industrial and agricultural production in a plurality of areas with developed economy and dense population, and a large amount of pollutants are enriched in bottom mud to cause serious endogenous pollution. When the concentration of the bottom sediment pollutants is 2-3 times higher than the bottom value, the potential harm is considered to human and aquatic ecosystems, and pollution release control needs to be carried out in the modes of in-situ covering, dredging and the like.
Electrokinetics (Electrokinetics) is a green technology for remediating contaminated bottom mud, and is mainly used for removing heavy metals and organic pollutants from low-permeability bottom mud. The principle is that a direct current electric field is applied to polluted bottom mud, so that moisture and pollutants are transferred under the action of the electric field to achieve the purpose of removal. Migration under the influence of an electric field is mainly carried out by electromigration and electrodialysis. The electromigration effect refers to a migration process of charged ions in the sediment pore water under the action of an electric field; electrodialysis is the movement process of the bottom sludge pore water itself. The electrodynamic technology can be used for the dehydration treatment of the bottom sludge and the removal of heavy metals and organic pollutants in the bottom sludge.
At present, most of electric repair devices generally comprise an anode, a cathode, a sample chamber, an anode chamber, a cathode chamber, a direct current power supply and the like, and are complex in structure and high in engineering application difficulty. In a low-voltage direct-current electric field, bottom mud pore water is electrolyzed to generate H+With OH-, cations and pore water migrate to the cathode and anions to the anode. The neutral pollutants in the bottom mud are subjected to electroosmotic current and H+The effects of (a) are dissolved and released and concentrated near the electrode as pore water migrates. However, due to the failure to exclude pore water, the contaminants migrate rather than separate in the bottom mud medium; and H+And the massive accumulation of OH "also results in rapid acid corrosion of the anode, and alkalisation of the cathode in complex with precipitation of metal ions. In addition, cations, particularly positively charged heavy metal ions, meet OH & lt- & gt accumulated near the cathode and generate precipitates, so that bottom mud micropores are blocked, the conductivity is reduced, the energy consumption is increased, and the repair efficiency is reduced. Thus, for electrokinetic remediation, pore water is drained quickly, avoiding H+And OH-is accumulated in a large amount near the electrode, so that electrode blockage and polarization are relieved, and the key technical problem which needs to be solved urgently is to improve the electric remediation efficiency of the polluted bottom mud.
Patent CN 201710042701 discloses an electric remediation device for contaminated soil, which is composed of a plurality of treatment units connected in series or in parallel. Each processing unit comprises a vertical cylindrical insulating processing box, a vertical cylindrical COMBOPO detachable replaceable composite cathode, an inert anode, a self-made non-standard programmable SynC alternating current and direct current hybrid power supply, a CAMP bag and the like, can be applied to repair and processing of heavy metal and/or organic and/or radioactive contaminated soil and/or sludge and/or solid waste, and can also be applied to enrichment and extraction of rare and/or rare earth and/or precious metal lean ores.
Patent CN201721112967 discloses a flexible integrated electric repairing device suitable for mechanical layout, which comprises a multifunctional electrode belt, conductive geotextile and a liquid discharge pipe, and can realize integration of conductivity, water guiding and automatic flow drainage; the multifunctional electrode belt can be processed into different widths according to the soil restoration depth, can be directly inserted into soil, only needs one end of a lead to be connected with a power supply, and is simple and convenient, not easy to corrode and good in shearing resistance; the flexible packaging bag has the characteristic of flexibility, can be stacked in a coiled manner, saves space, and is convenient to transport and mechanically arrange in a large area.
Patent CN 201711172415 discloses a river and lake polluted bottom sediment in-situ decrement decontamination device based on pore water drainage, which comprises a direct-current stabilized voltage power supply, a peristaltic pump and an electric dehydration decontamination electrode. The electric dehydration decontamination electrode comprises a water guide electrode plate, organic glass plates with holes, a filter screen and an upper water covering isolation cover, wherein the organic glass plates with holes are arranged on two sides of the water guide electrode plate, the filter screen is arranged on the outer side of the organic glass plates with holes, and the upper water covering isolation cover is covered on the water guide electrode plate. The method has the advantages of strong field working capacity, good in-situ separation and removal effect of bottom mud pollutants, less power consumption, low operation cost, simple maintenance, no chemical agent pollution and solid waste generation, small influence on the benthic ecological environment of rivers and lakes and the like.
Pore water is the important occurrence medium of sediment pollution and key release source, leads around pore water and arranges and separate with the pollutant, and current electronic relevant technique of restoreing and device have following not enoughly:
(1) the accumulation of OH < - > causes the accumulation of pollutants near the cathode area, and the problems of electrode scaling and blockage, unsmooth pore water drainage, pollutant enrichment and the like occur; in the electric repairing process, more pollutants are migrated, but the final separation and removal are insufficient;
(2) the pore water drainage, the cathode region pH value monitoring control, the cathode anti-scaling protection and other integrated considerations are not enough, so that the electric repair process is interrupted or the electrode is replaced and the like;
(3) the contact area of the sheet or rod-shaped electrode and the bottom mud is limited, the pore water drainage capacity is low, and the pollution separation and removal are insufficient.
Disclosure of Invention
In order to overcome the defects of the existing electric repair technology and device, the aim of maximizing drainage of pore water and separating pollutants is fulfilled, the key point is to reduce electrode blockage and pollutant enrichment in a cathode region, and the double-ring vertical self-cleaning type in-situ dehydration pollution-reduction electric repair device and method are provided.
The invention is realized by adopting the following technical scheme:
a double-ring vertical self-cleaning type in-situ dehydration pollution-reduction electric restoration device comprises a pore water collection ring, a cathode protection liquid release ring, a water-guiding insulating anti-blocking cathode, an inert anode, a cathode protection liquid storage pool, a pore water storage pool, a pH sensor, a peristaltic pump and a programmable controller; the cathode protection solution release ring is positioned at the upper part of the pore water collecting ring, the cathode protection solution release ring is connected with the pore water collecting ring through a water-conducting insulating anti-blocking cathode, the water-insulating anti-blocking cathode is arranged around the inert anode, a capillary water-conducting filter tube is arranged in the water-insulating anti-blocking cathode, the cathode protection solution release ring is communicated with the pore water collecting ring through the capillary water-conducting filter tube, the capillary water-conducting filter tube is used for conducting and discharging pore water to the pore water collecting ring, the pore water collecting ring and the cathode protection solution release ring are connected with a peristaltic pump through a guide tube, and the peristaltic pump is communicated with a pore water storage pool and a cathode protection solution storage pool through guide tubes; the pH sensor and the peristaltic pump are connected with the programmable controller, the programmable controller is used for controlling the action of the peristaltic pump according to the pH value of the pore water monitored by the pH sensor to replenish the cathode protection liquid in the cathode protection liquid storage tank into the cathode protection liquid release ring, and the cathode protection liquid in the cathode protection liquid release ring is released into the water-guiding insulating anti-blocking cathode through the capillary water-guiding filter tube.
Furthermore, the device also comprises a power supply connected with the water-guiding insulating anti-blocking cathode, the inert anode, the peristaltic pump, the programmable controller and the pH sensor.
Furthermore, the cathode protection solution release ring and the pore water collecting ring are both in a circular ring tubular structure, the cathode protection solution release ring is connected with the pore water collecting ring through a water-guiding insulating anti-blocking cathode to form a hollow cylindrical structure, and the inert anode is surrounded in the middle of the hollow cylindrical structure by the water-guiding insulating anti-blocking cathode.
Further, the water guide insulating anti-blocking cathode is composed of an insulating layer, a capillary conductive permeable drainage layer and an anti-blocking layer, the insulating layer is located on the outer side of the capillary conductive permeable drainage layer and used for limiting the range to be repaired, untreated sediment is isolated, a capillary water guide filter pipe, a conductive material and a metal wire are distributed in the capillary conductive permeable drainage layer, the capillary water guide filter pipe is used for guiding pore water and cathode protection liquid, the conductive material is connected with a power supply through the metal wire, the anti-blocking layer is located on the inner side of the capillary conductive permeable drainage layer and used for preventing sediment particles from invading the capillary water guide filter pipe of the water guide insulating anti-blocking cathode.
Furthermore, the anti-blocking layer is made of a stainless steel filter screen or permeable cloth.
Further, a handle is included for inserting the pore water collection ring into the target substrate layer.
Furthermore, the handle comprises a holding part positioned on the upper part and an inserting rod connected with the holding part and extending downwards, the bottom of the inserting rod is connected with the outer side of the bottom of the pore water collecting ring, and the holding part is positioned near the cathode protection liquid release ring and is slightly higher than the cathode protection liquid release ring.
Furthermore, the cathode protection liquid release ring is a detachable perforated hard insulating tube, and a small hole is formed below the cathode protection liquid release ring and is used for connecting a capillary conductive water-permeable and water-draining layer of the water-guiding insulating anti-blocking cathode.
Further, the cathodic protection solution is a soil environment-friendly organic acid solution.
A double-ring vertical self-cleaning type in-situ dehydration pollution-reduction electric restoration method is characterized by being carried out by adopting the device, and the method comprises the following steps:
step one, a power supply is started to supply power to a water-conducting insulating anti-blocking cathode and an inert anode, bottom sediment pore water and pollutants contained in the bottom sediment pore water migrate to the water-conducting insulating anti-blocking cathode under the action of an electric field, a capillary water-conducting filter tube in the water-conducting anti-blocking cathode conducts and discharges the pore water to a pore water collecting ring for storage, and then a programmable controller 12 controls a peristaltic pump to pump the pore water in the pore water collecting ring into a pore water storage pool;
and step two, the pH sensor monitors the pH value of the pore water discharged into the pore water storage pool in real time, when the pH value of the pore water is weakly acidic or alkaline, the programmable controller controls the action of the peristaltic pump to replenish the cathode protection solution in the cathode protection solution storage pool into the cathode protection solution release ring, the cathode protection solution in the cathode protection solution release ring is released through a capillary water guide filter tube of the water guide insulating anti-blocking cathode to enter the water guide insulating anti-blocking cathode for dissolving the scale on the surface of the water guide insulating anti-blocking cathode and activating to release pollutants enriched in a cathode region, and when the pH value of the pore water is acidic again, the programmable controller controls the peristaltic pump to be closed to stop replenishing the cathode protection solution.
Due to the adoption of the scheme, the outstanding technical innovation and remarkable progress of the invention are as follows:
(1) through the capillary water guide filter tube of the water guide insulation anti-blocking cathode, one end of the capillary water guide filter tube is connected with the pore water collecting ring, and the other end of the capillary water guide filter tube is connected with the cathode protective solution releasing ring, so that the pore water is guided and discharged, and the cathode protective solution is released, the problems of scaling blockage of the water guide insulation anti-blocking cathode, pollutant enrichment in a cathode area and the like are solved, a pore water migration path is unblocked, the separation and release of pollutants in the cathode area are promoted, and the efficiency of pore water guide and discharge and pollutant reduction is improved;
(2) the interruption of the electric repair process due to cathode protection is avoided, the service life and the working efficiency of the cathode are improved, and the self-cleaning of the cathode is realized;
(3) the electric repair range is limited, and the electric energy utilization and electric repair efficiency are improved; the contact area of the water-guiding insulating anti-blocking cathode and the polluted bottom mud is increased, and pore water collection and drainage are facilitated;
(4) the pH sensor is combined with a Programmable Logic Controller (PLC), the addition of the cathode protection solution is scientifically controlled according to the change of the inlet pH value of the pore water storage pool and the acidification and dissociation characteristics of pollutants, and the effective protection of the electrode and the fine control of the separation of the pollutants are realized.
Drawings
FIG. 1 is a schematic structural diagram of a double-ring vertical self-cleaning type in-situ dehydration pollution-reduction electric repairing device of the invention;
FIG. 2 is a schematic view of the construction of the capillary conductive water permeable and draining layer of the present invention;
FIG. 3 is a flow chart of the double-ring vertical self-cleaning type in-situ dehydration pollution-reduction electric repairing device.
In the figure: 1-pore water collecting ring, 2-water-guiding insulating anti-blocking cathode, 3-inert anode, 4-cathodic protection solution releasing ring, 5-handle, 6-conduit, 7-pore water storage pool, 8-pH sensor, 9-peristaltic pump, 10-cathodic protection solution storage pool, 11-power supply, 12-programmable controller, 2-1-insulating layer, 2-2-capillary conductive permeable and drainage layer, 2-3-anti-blocking layer, 2-2-1-capillary water-guiding filter tube, 2-2-2-conductive material and 2-2-3-lead.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a double-ring vertical self-cleaning in-situ dehydration and pollution reduction electric repair device, which comprises a pore water collecting ring 1, a cathode protection solution releasing ring 4, a water-conducting insulating anti-blocking cathode 2, an inert anode 3, a handle 5, a conduit 6, a cathode protection solution storage tank 10, a pore water storage tank 7, a pH sensor 8, a peristaltic pump 9, a power supply 11 and a Programmable Logic Controller (PLC) 12. The water-conducting insulating anti-blocking cathode 2 comprises an insulating layer 2-1, a capillary conducting and water-permeable and drainage layer 2-2 and an anti-blocking layer 2-3, wherein the capillary conducting and water-permeable and drainage layer 2-2 comprises a capillary water-conducting filter tube 2-2-1, a conducting material 2-2-2 and a conducting wire 2-2-3.
For polluted bottom mud and the like, firstly, the water content, the types, the contents and the effective state contents of pollutants such as heavy metals and the like are investigated, and the restoration depth is determined. Insert target substrate layer with hole water collecting ring 1, hole water collecting ring 1 is insulating annular stereoplasm insulating tube, and hole water collecting ring 1 prevents stifled negative pole 2 intercommunication with the water guide is insulating, and hole water collecting ring 1 is used for collecting and storing the water guide insulating hole water and the pollutant that contains in the hole water of preventing stifled negative pole 2 enrichment.
The water-conducting insulating anti-blocking cathode 2 consists of an insulating layer 2-1, a capillary conductive water-permeable and draining layer 2-2 and an anti-blocking layer 2-3, wherein the insulating layer 2-1 is positioned outside the capillary conductive water-permeable and draining layer 2-2 and is used for limiting the range to be repaired, isolating untreated bottom mud and improving the utilization efficiency of electric energy; a capillary water guide filter pipe 2-2-1, a conductive material 2-2-2 and a metal wire 2-2-3 are distributed in the capillary conductive permeable drainage layer 2-2, the capillary water guide filter pipe 2-2-1 is used for guiding and draining pore water and cathode protection liquid, the conductive material 2-2-2 is connected with a power supply 11 through the metal wire 2-2-3, and the conductive material 2-2-2 can be made of graphite; the anti-blocking layer 2-3 is positioned at the inner side of the capillary conductive permeable drainage layer 2-2 and can be made of filter cloth or permeable cloth and is used for preventing bottom mud particles from invading the capillary water guide filter tube 2-2-1 of the water guide insulating anti-blocking cathode 2.
The handle 5 comprises a holding part positioned on the upper part and an inserting rod connected with the holding part and extending downwards, the bottom of the inserting rod is connected with the outer side of the bottom of the pore water collecting ring 1, the holding part is positioned near the cathode protection solution releasing ring 4 and is slightly higher than the cathode protection solution releasing ring 4, and the handle 5 is made of an insulating material. The handle 5 is used to insert the pore water collecting ring 1 into the target substrate layer.
The cathode protection liquid release ring 4 is a detachable perforated hard insulating tube and is positioned on the upper part of the pore water collecting ring 1, the cathode protection liquid release ring 4 and the pore water collecting ring 1 are both in a circular tubular structure and are connected by the water-conducting insulating anti-blocking cathode 2, the pore water collecting ring 1 is inserted into a target bottom mud layer and then forms a hollow cylindrical barrel structure with the water-conducting insulating anti-blocking cathode 2 and the pore water collecting ring 1, the inert anode 3 is positioned in the middle of the cylindrical barrel, namely the inert anode 3 is surrounded by the water-conducting insulating anti-blocking cathode 2, and the water-conducting insulating anti-blocking cathode 2 is the side wall of the hollow cylindrical barrel. The cathode protection solution release ring 4 is communicated with the pore water collection ring 1 through a capillary water guide filter tube 2-2-1 of the water guide insulation anti-blocking cathode 2. The capillary water guide filter tube 2-2-1 can guide and discharge pore water and can also be used for releasing cathode protection liquid. The lower part of the cathode protection solution release ring 4 is provided with a small hole 4-1 for accessing a capillary conductive permeable drainage layer 2-2 of the water guide insulation anti-blocking cathode 2, and the cathode protection solution stored in the cathode protection solution release ring 4 is released into the water guide insulation anti-blocking cathode 2 through a capillary water guide filter tube 2-2-1 of the water guide insulation anti-blocking cathode 2 and is used for dissolving the scaling on the surface of the water guide insulation anti-blocking cathode 2 and activating and releasing pollutants enriched in a cathode area.
The pore water collecting ring 1 and the cathodic protection solution releasing ring 4 are connected with a peristaltic pump 9 through a conduit 6 (such as a rubber drainage hose), and the peristaltic pump 9 is communicated with a pore water storage tank 7 and a cathodic protection solution storage tank 10 through conduits.
Under the action of an electric field, the pore water and pollutants contained in the pore water migrate and concentrate from the inert anode 3 to the water-conducting insulating anti-blocking cathode 2, and after the pore water and the pollutants contained in the pore water are treated for a certain time, the pore water stored in the pore water collecting ring 1 is pumped and discharged by virtue of a peristaltic pump 9. Specifically, the pore water stored in the pore water collecting ring 1 is pumped into a pore water storage pool 7 by a peristaltic pump 9 through a conduit 6, and a pH sensor 8 is installed at the water inlet end of the pore water storage pool 7 and is used for monitoring the pH value of the pore water guided and discharged by the water-guiding insulating anti-blocking cathode 2. For most heavy metals, the alkaline environment promotes Ca, Mg and the like to form scale on the surface of the capillary conductive water permeable and draining layer 2-2, and simultaneously causes heavy metal pollutants which are transferred from the inert anode 3 to the vicinity of the water guide insulating anti-blocking cathode 2 to form precipitates. Therefore, when the pH value of the pore water is weakly acidic or alkaline, the cathodic protection solution is added. The pH sensor 8 and the peristaltic pump 9 are connected to a programmable controller (PLC) 12.
The solution reservoir 10 is used for storing a solution (e.g., citric acid, oxalic acid, FeCl)3Etc.), the cathodic protection solution is organic acid solution such as citric acid which is friendly to the soil environment, and the peristaltic pump 9 is started by controlling the peristaltic pump 9 through a Programmable Logic Controller (PLC)12 according to the monitoring data of the pH sensor 8, and the cathodic protection solution in the cathodic protection solution storage tank 10 is added into the cathodic protection solution adding ring 4 through the peristaltic pump 9; when the pH value of the pore water drained by the water-guiding insulating anti-blocking cathode 2 returns to acidity, the Programmable Logic Controller (PLC)12 controls the peristaltic pump 9 to be closed, and the cathode protection solution is stopped to be supplemented.
The power supply 11 is connected with the water-guiding insulating anti-blocking cathode 2, the inert anode 3, the peristaltic pump 9, the Programmable Logic Controller (PLC)12 and the pH sensor 8, so that on one hand, electric repairing power is provided for the inert anode 3 and the water-guiding insulating anti-blocking cathode 2, and pore water migration and pollutant separation are promoted; on the other hand, a power supply 11 is connected with the pH sensor 8, the peristaltic pump 9 and a Programmable Logic Controller (PLC)12, and provides electric support for pore water drainage, pH monitoring and cathode protection solution addition.
As shown in fig. 3, an embodiment of the present invention further provides a double-ring vertical self-cleaning in-situ dehydration pollution-reduction electric repairing method, which is performed by using the above apparatus, and the method includes the following steps:
step one, a power supply 11 is started to supply power to a water-guiding insulating anti-blocking cathode 2 and an inert anode 3, bottom sediment pore water and pollutants contained in the bottom sediment pore water migrate to the water-guiding insulating anti-blocking cathode 2 under the action of an electric field, a capillary water-guiding filter tube 2-2-1 in the water-guiding insulating anti-blocking cathode 2 guides and discharges the pore water to a pore water collecting ring 1 for storage, and then a programmable controller 12 controls a peristaltic pump 9 to pump the pore water in the pore water collecting ring 1 into a pore water storage pool 7;
and step two, a pH sensor 8 monitors the pH value of the pore water discharged into a pore water storage tank 7 in real time, when the pH value of the pore water is weakly acidic or alkaline, a programmable controller 12 controls a peristaltic pump 9 to act, the cathode protection solution in a cathode protection solution storage tank 10 is supplemented into a cathode protection solution release ring 4, the cathode protection solution in the cathode protection solution release ring 4 is released into a water-guiding insulating anti-blocking cathode 2 through a capillary water-guiding filter tube 2-2-1 of the water-guiding insulating anti-blocking cathode 2 and is used for dissolving the scale on the surface of the water-guiding insulating anti-blocking cathode 2 and activating and releasing pollutants enriched in a cathode area, and when the pH value of the pore water is recovered to be acidic, the programmable controller 12 controls the peristaltic pump 9 to be closed and stops supplementing the cathode protection solution.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910742931.1A CN110434166B (en) | 2019-08-13 | 2019-08-13 | A double-ring vertical self-cleaning type in-situ dehydration and pollution reduction electric repair device and method |
Applications Claiming Priority (1)
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| CN113198792B (en) * | 2021-05-12 | 2022-08-12 | 佛山市顺德区美的饮水机制造有限公司 | Electrode cleaning device for household electrical appliance |
| 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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