An electric device for remediation of cadmium-contaminated soil and its control method

Abstract

The present invention relates to an electric device for remediating cadmium-contaminated soil and a control method thereof, belonging to the field of environmental governance technology. The housing includes an insulating partition, a screw is installed in the middle of the insulating partition, the end of the screw is connected to a servo motor, a guide rod is provided directly below the screw, an electrode repair mechanism is installed on the guide rod, an activator addition module is fixed on the top of the housing, and a plurality of soil remediation grooves are provided at the bottom of the housing; the activator addition module includes a disc funnel, a plurality of slide rails are provided inside the disc funnel, each of the slide rails is installed on a slider, one end of a connecting rod is welded to the top of the slider, and an electromagnetic control module is fixed to the other end of the connecting rod. The present invention can intelligently select an activator for activation based on the cadmium contamination in the soil sample, and perform electric field-controlled migration of the active cadmium in the activated soil, thereby realizing a technology for efficiently remediating cadmium contamination in the soil through coordinated electric migration of the activator.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental governance, and in particular to an electric device for remediating cadmium-contaminated soil and a control method thereof. Background Art

[0002] Cadmium is a heavy metal that is extremely harmful to human health. Its main sources include industrial wastewater, waste, pesticides, and coal combustion. Cadmium accumulation in soil is due to factors such as soil inorganic chemical properties and land use patterns. Paddy field cadmium contamination refers to excessive cadmium content in the soil, which is then absorbed by rice, resulting in excessive cadmium levels in the rice. To address the lack of rapid reduction technologies for cadmium-contaminated paddy field soils, electrokinetic remediation of cadmium contamination in typical southern paddy field soils can be achieved through the use of different activators in conjunction with a variety of materials. This involves constructing an efficient electrokinetic remediation system and studying the electric field migration patterns and mechanisms of activators and different cadmium forms. However, electrokinetic devices specifically designed for this technology are currently lacking. Traditional methods require manual selection of activators and the fabrication or manipulation of electrode equipment, resulting in low remediation efficiency, high electrode operation risks, and potential safety hazards. Furthermore, the remediation results for cadmium-contaminated soils are unsatisfactory and fall short of the intended remediation goals. Therefore, it is necessary to develop an electrokinetic device that can efficiently and safely remediate cadmium-contaminated soils to address these issues. Summary of the Invention

[0003] The present invention overcomes the deficiencies of the prior art and provides an electric device for remediating cadmium-contaminated soil and a control method thereof.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A first aspect of the present invention provides an electric device for remediating cadmium-contaminated soil, the electric device comprising a housing, an activator addition module, and an electrode repair mechanism:

[0006] The housing includes an insulating partition, a screw is installed in the middle of the insulating partition, the end of the screw is connected to a servo motor, a guide rod is provided directly below the screw, an electrode repair mechanism is installed on the guide rod, an activator addition module is fixed on the top of the housing, and a plurality of soil repair grooves are opened at the bottom of the housing;

[0007] The activator adding module includes a disc funnel, a plurality of slide rails are provided inside the disc funnel, a slider is installed on each slide rail, one end of a connecting rod is welded to the top of the slider, and an electromagnetic control module is fixed to the other end of the connecting rod;

[0008] The electrode repair mechanism includes a triangular connecting plate, on which a first connecting hole, a second connecting hole and a third connecting hole are provided. The first connecting hole is connected to a fixed column, and the fixed column is provided on a movable plate. The second connecting hole is connected to the top of the output rod of the cylinder, and the output rod of the cylinder passes through a circular through hole, and the circular through hole is provided on the movable plate, and the cylinder is fixed to the bottom of the movable plate. The third connecting hole is connected to the bottom of the power supply board.

[0009] Furthermore, in a preferred embodiment of the present invention, the electromagnetic control module includes a liquid blocking plug, a metal core is provided inside the liquid blocking plug, and a conductive coil is wound around the outside of the metal core, and the conductive coil is connected to the control system.

[0010] Furthermore, in a preferred embodiment of the present invention, one end of a first spring is fixed to the side of each electromagnetic control module, the other end of the first spring is connected to the side wall of the disc funnel, and a plurality of activator storage tanks are provided on the top of the disc funnel.

[0011] Furthermore, in a preferred embodiment of the present invention, the outlet of each activator storage tank is placed above a liquid blocking plug, a permanent magnet is provided in the middle of the disc funnel, and a liquid outlet conduit is connected to the bottom of the disc funnel.

[0012] Furthermore, in a preferred embodiment of the present invention, a screw nut is provided on the movable plate, and the screw nut is installed on the screw rod. A sliding guide block is provided on the movable plate, and the sliding guide block is connected to the guide rod.

[0013] Furthermore, in a preferred embodiment of the present invention, the electrode power supply device is connected to the top of the power board through a wire, and two current conductive ends are provided on the bottom of the power board. The two current conductive ends are placed in the limiting guide pillars, and the limiting guide pillars are fixed on the movable plate.

[0014] Furthermore, in a preferred embodiment of the present invention, a plurality of U-shaped conductive plates are arranged directly below the two current conducting ends, and a positive electrode material and a negative electrode material are arranged at the bottom of each U-shaped conductive plate. The positive electrode material and the negative electrode material on each U-shaped conductive plate are modified graphite, stainless steel and titanium-coated ruthenium, respectively, and the positive electrode material and the negative electrode material are placed above each soil remediation trough.

[0015] Furthermore, in a preferred embodiment of the present invention, each of the U-shaped conductive plates is connected to the insulating cross plate through a hinge, and a plurality of spring-fixed cross bars are provided above the insulating cross plate, and each end of the spring-fixed cross bar is connected to one end of a second spring, and the other end of the second spring is connected to an insulating block, and each of the insulating blocks is correspondingly arranged on each of the U-shaped conductive plates, and a current sensor is installed on each of the U-shaped conductive plates.

[0016] Another aspect of the present invention provides a control method for an electric device for remediating cadmium-contaminated soil, which is applied to any one of the electric devices for remediating cadmium-contaminated soil, and comprises the following steps:

[0017] Obtain the actual cadmium pollution content of paddy field soil samples, and at the same time obtain the cadmium pollution content gradient map of paddy field soil based on the big data network;

[0018] Searching the cadmium pollution content level gradient map based on the actual cadmium pollution content to obtain a risk level corresponding to the actual cadmium pollution content, and determining whether the risk level corresponding to the actual cadmium pollution content is greater than a preset risk level;

[0019] If it is greater than, a knowledge graph of cadmium-contaminated soil remediation is obtained based on a big data network, and the risk level corresponding to the actual cadmium pollution content is imported into the knowledge graph of cadmium-contaminated soil remediation for identification to obtain one or more target activator parameters;

[0020] Obtaining historical repair rates corresponding to one or more target activator parameters, constructing a curve graph, importing the historical repair rates into the curve graph for plotting, and calculating the curvature of the historical repair rates for each target activator;

[0021] determining whether the curvature is greater than a preset curvature; if so, extracting target activator parameters corresponding to curvatures greater than the preset curvature to obtain screened target activator parameters; arranging the screened target activator parameters in ascending order based on the curvatures, and extracting the target activator parameter corresponding to the maximum curvature;

[0022] Based on the target activator parameter corresponding to the maximum curvature, the electromagnetic control module below the target activator storage tank is powered on and regulated to enable the target activator storage tank to add the activator in a quantitative manner. The electric field strength error between the current electric field strength on the electrode material and the required electric field strength is analyzed according to the target activator parameter corresponding to the maximum curvature, and the electrode power supply device is regulated based on the electric field strength error.

[0023] Furthermore, in a preferred embodiment of the present invention, analyzing the electric field intensity error between the current electric field intensity on the electrode material and the required electric field intensity based on the target activator parameter corresponding to the maximum curvature, and regulating the electrode power supply device based on the electric field intensity error, specifically includes the following steps:

[0024] Obtaining information about the type of electrode material, and obtaining the conductivity of the motor material type based on a big data network;

[0025] Obtaining the current power supply current of the electrode power supply device, and calculating the electric field strength on the current electrode material by combining the current power supply current of the electrode power supply device and the conductivity;

[0026] Obtaining the remediation requirements for cadmium-contaminated soil, identifying the target activator parameter corresponding to the maximum curvature in the cadmium-contaminated soil remediation knowledge graph, obtaining the activation coefficient of the target activator parameter corresponding to the maximum curvature, and calculating the required electric field strength based on the remediation requirements for cadmium-contaminated soil and the activation coefficient;

[0027] Calculate the deviation between the current electric field strength on the electrode material and the required electric field strength to obtain a deviation rate value, and determine whether the deviation rate value is greater than a preset deviation rate threshold. If it is greater, introduce a hash algorithm to calculate the hash value between the deviation rate value and the preset deviation rate threshold, and regulate the electrode power supply device based on the hash value until the required electric field strength is reached.

[0028] The beneficial technical effects of the present invention are:

[0029] Current is passed through the energized conductive coil in the electromagnetic control module, and a magnetic field is generated between the energized conductive coil and the metal core. The magnetic field generated at this time is opposite to the magnetic pole of the permanent magnet, so that the permanent magnet attracts the electromagnetic control module, thereby relying on the slider to slide on the slide rail to achieve smooth lateral movement. At this time, the liquid blocking plug on the electromagnetic control module below the liquid outlet of the target activator storage tank is removed to cancel the blockage, so that the activator in the target activator storage tank flows into the disc funnel, and then flows into the target soil remediation tank below through the liquid outlet pipe, realizing the intelligent control effect of automatic addition of activator, replacing manual selection The steps of taking and adding are time-saving and labor-saving, and the remediation accuracy and rate of cadmium-contaminated soil are improved; the triangular connecting plate is driven to rotate by the cylinder, so that the triangular connecting plate drives the power supply plate and the two current conductive ends to move vertically downward. At this time, the two current conductive ends contact the U-shaped conductive plate so that the positive and negative electrode materials are energized, and the two current conductive ends exert pressure on the U-shaped conductive plate during the downward vertical movement, so that the U-shaped conductive plate is folded downward through the hinge, which can enable the energized positive and negative electrode materials to contact the soil sample to be remediated, and the cadmium pollution in the soil sample is electrically migrated, thereby realizing an efficient remediation technology of coordinated electric migration of activators. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0031] Figure 1 Schematic diagram of the overall structure of the electric device;

[0032] Figure 2 Schematic diagram of the internal structure of the electric device;

[0033] Figure 3 It is a schematic diagram of the AA partial structure of the electric device;

[0034] Figure 4 This is a schematic diagram of the structure of the insulating partition and the soil remediation trough;

[0035] Figure 5 Schematic diagram of the overall structure of the activator adding module;

[0036] Figure 6 Schematic diagram of the internal structure of the disc funnel;

[0037] Figure 7 A schematic diagram of the structure for controlling the addition of activator by energizing the electromagnetic control module;

[0038] Figure 8 It is a schematic diagram of the cross-sectional structure of the electromagnetic control module;

[0039] Figure 9 Schematic diagram of the structure of the triangular connecting plate.

[0040] The following are the descriptions of the reference numerals:

[0041] 101. Housing; 102. Insulating partition; 103. Screw; 104. Servo motor; 105. Guide rod; 106. Soil remediation tank; 107. Disc funnel; 108. Slide rail; 109. Slider; 201. Connecting rod; 202. Electromagnetic control module; 203. Liquid blocking plug; 204. Metal core; 205. Current conducting coil; 206. First spring; 207. Activator storage tank; 208. Permanent magnet; 209. Liquid outlet pipe; 301. Triangular connecting plate; 302. First connecting hole; 303. Second connecting hole Hole; 304, third connecting hole; 305, fixed column; 306, movable plate; 307, cylinder; 308, power supply board; 309, screw nut; 401, sliding guide block; 402, electrode power supply device; 403, current conducting end; 404, limiting guide column; 405, U-shaped conductive plate; 406, positive electrode material; 407, negative electrode material; 408, hinge; 409, insulating cross plate; 501, spring fixing cross bar; 502, second spring; 503, insulating block; 504, control system; 505, circular through hole. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner. Therefore, they only show the structures related to the present invention. It should be noted that, unless there is a conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0046] like Figure 1 As shown, the first aspect of the present invention provides an electric device for remediating cadmium-contaminated soil, which includes a housing 101, an activator adding module and an electrode repair mechanism.

[0047] like Figure 1 、 2 As shown in Figures 3 and 4, the casing 101 includes an insulating partition 102, a screw rod 103 is installed in the middle of the insulating partition 102, the end of the screw rod 103 is connected to a servo motor 104, a guide rod 105 is provided directly below the screw rod 103, and an electrode repair mechanism is installed on the guide rod 105. An activator adding module is fixed on the top of the casing 101, and a plurality of soil repair grooves 106 are opened at the bottom of the casing 101.

[0048] It should be noted that, first, the cadmium-contaminated soil to be repaired is sampled and grouped using existing sampling technology, and the number of sampling groups corresponds to the soil remediation groove. The sampled cadmium-contaminated soil sample to be repaired is placed on the desktop, and then the electric device is moved and placed directly above the cadmium-contaminated soil sample to be repaired, so that each soil sample is placed within the range of each soil remediation groove 106. At this time, the servo motor 104 can be controlled to drive the screw rod 103 to rotate, and the rotation of the screw rod 103 drives the electrode repair mechanism to translate, so that the electrode repair mechanism can perform electrode repair on the cadmium-contaminated soil sample within the range of each soil remediation groove 106. At the same time, the translation of the electrode repair mechanism will drive the liquid outlet guide in the activator addition module to move. Tube 209 follows the movement, thereby adding different activators to the cadmium-contaminated soil samples in each soil remediation tank 106 to study the migration behavior and pattern of cadmium under the action of the electric field, thereby comprehensively remediating the cadmium pollution in the soil, solving the serious problem of cadmium pollution in southern rice fields, and avoiding the harmful effects of cadmium pollution on the human body caused by the accumulation of cadmium pollution in rice crops; since the electric device is small in size and light in weight, it can be used for indoor remediation research on cadmium-contaminated soil samples and is highly portable; and since the electrode repair mechanism requires the electrodes to be energized, insulating partitions 102 are provided on both sides of the casing 101, which can block the current from flowing through the casing, avoiding electric shock to the human body when the electrodes are energized for repair, thereby improving the safety factor and achieving high reliability.

[0049] like Figure 1 、 5 As shown in Figure 6, the activator adding module includes a disc funnel 107, and a plurality of slide rails 108 are provided inside the disc funnel 107. A slider 109 is installed on each of the slide rails 108. One end of a connecting rod 201 is welded to the top of the slider 109, and an electromagnetic control module 202 is fixed to the other end of the connecting rod 201.

[0050] like Figure 1 、 6 As shown in , 7 and 8 , the electromagnetic control module 202 includes a liquid blocking plug 203 , a metal core 204 is provided inside the liquid blocking plug 203 , a conductive coil 205 is wound around the outside of the metal core 204 , and the conductive coil 205 is connected to the control system 504 .

[0051] like Figure 1 、 7 As shown, one end of a first spring 206 is fixed to the side of each electromagnetic control module 202 , and the other end of the first spring 206 is connected to the side wall of the disc funnel 107 . A plurality of activator storage tanks 207 are provided on the top of the disc funnel 107 .

[0052] like Figure 6 、 7As shown, the outlet of each activator storage tank 207 is placed above the liquid blocking plug 203 , a permanent magnet 208 is provided in the middle of the disc funnel 107 , and a liquid outlet conduit 209 is connected to the bottom of the disc funnel 107 .

[0053] It should be noted that each activator storage tank 207 on the disc funnel 107 stores a corresponding different activator. According to the analysis requirements of the migration behavior of cadmium of different activators under the synergy of the electric field, the required activator is selected and added to the soil remediation tank 106 where the cadmium-contaminated soil sample to be remediated is located. The control system transmits instructions to input a quantitative current to the energized conductive coil 205 in the electromagnetic control module 202 corresponding to the target activator storage tank 207, so that a magnetic field is generated between the energized conductive coil 205 and the metal core 204 after being energized. At this time, the magnetic field generated will be opposite to the magnetic pole of the permanent magnet 208, generating a mutual attraction force, so that the permanent magnet 208 will push the electromagnetic control module 202 Attraction is achieved by sliding the slider 109 on the slide rail 108 to achieve smooth lateral movement. At this time, the liquid blocking plug 203 on the electromagnetic control module 202 below the liquid outlet of the target activator storage tank 207 is removed to cancel the blockage, so that the activator in the target activator storage tank 207 flows into the disc funnel 107, and then flows into the target soil remediation tank 106 below through the liquid outlet conduit 209. It should be added that the liquid outlet conduit 209 can move with the electrode remediation mechanism to achieve precise addition of the target activator and combine it with the cadmium-contaminated soil to be remediated in the target soil remediation tank 106, further study the morphological transformation of cadmium by the activator and soil components, and improve the remediation performance of cadmium-contaminated soil.

[0054] It should be noted that when the electromagnetic control module 202 is attracted and translated by the permanent magnet 208, the first spring 206 generates a pulling force on the electromagnetic control module 202, causing the electromagnetic control module 202 to generate a reset force in the opposite direction. When the power to the energized conductive coil 205 is stopped, the energized conductive coil 205 and the metal core 204 in the electromagnetic control module 202 no longer generate a magnetic field, so that the permanent magnet 208 cannot magnetically attract the electromagnetic control module 202. At this time, the electromagnetic control module 202 realizes a reset movement under the reset elastic force of the first spring 206, so that the electromagnetic control module 202 The liquid blocking plug 203 on the target activator storage tank 207 is blocked again to stop the addition of the activator, thereby realizing the intelligent control effect of automatic addition of the activator, replacing the steps of manual selection and addition, saving time and labor, improving the remediation accuracy and rate of cadmium-contaminated soil, and avoiding the addition error of the activator; it should be added that the activator in the activator storage tank 207 is selected from green, efficient natural small molecule acid soil cadmium activator and biochemical green synthetic humic acid soil cadmium activator to ensure the high efficiency of cadmium-contaminated soil remediation and clarify the activation law and mechanism.

[0055] like Figure 3 、 9 As shown, the electrode repair mechanism includes a triangular connecting plate 301, and the triangular connecting plate 301 is provided with a first connecting hole 302, a second connecting hole 303 and a third connecting hole 304. The first connecting hole 302 is connected to the fixed column 305, and the fixed column 305 is provided on the movable plate 306. The second connecting hole 303 is connected to the top of the output rod of the cylinder 307, and the output rod of the cylinder 307 passes through the circular through hole 505. The circular through hole 505 is provided on the movable plate 306, and the cylinder 307 is fixed to the bottom of the movable plate 306. The third connecting hole 304 is connected to the bottom of the power supply board 308.

[0056] like Figure 3 As shown, a screw nut 309 is provided on the movable plate 306 , and the screw nut 309 is installed on the screw 103 . A sliding guide block 401 is provided on the movable plate 306 , and the sliding guide block 401 is connected to the guide rod 105 .

[0057] like Figure 2 、 3 As shown, the power supply board 308 is connected to the electrode power supply device 402 through a wire, and two current conductive ends 403 are provided at the bottom of the power supply board 308. The two current conductive ends 403 are placed in the limiting guide pillars 404, and the limiting guide pillars 404 are fixed on the movable plate 306.

[0058] It should be noted that before the cadmium-contaminated soil to be repaired is electrode-repaired, the servo motor 104 is first controlled to start and rotate the screw 103, so that the screw 103 drives the movable plate 306 to translate through the screw nut 309, and the movable plate 306 drives the liquid outlet pipe 209 of the activator addition module to add the target activator to the soil sample to be electrode-repaired, and at the same time, the electrode power supply device 402 and the two current conductive ends 403 are placed directly above the target soil remediation groove 106; after the target activator is combined with the soil sample, the electrode power supply device 402 is started to supply positive and negative currents, and the positive and negative currents flow to the current conductive ends 403 respectively through the power supply board, so that the two current conductive ends 403 generate positive current and negative current respectively, and then the output rod of the cylinder 307 is controlled to retract, and the output rod of the cylinder 307 is retracted. When retracted, the triangular connecting plate 301 will be rotated downward by a certain angle through the second connecting hole 303, and the triangular connecting plate 301 will be rotated on the fixed column 305 through the first connecting hole 302, so that the triangular connecting plate 301 drives the power board 308 to move downward through the hinge of the third connecting hole 304, and due to the limiting effect of the limiting guide column 404 on the two current conductive ends 403, the power board 308 moves vertically downward, so that the two current conductive ends 403 can be vertically contacted with the U-shaped conductive plate 405 directly below, achieving the conduction effect of applying positive and negative currents to the two ends of the U-shaped conductive plate 405 through the current conductive ends 403, further providing stable current contact and transmission for electrode repair, improving the electric repair performance and quality of cadmium-contaminated soil, and reducing the energy loss of electrode current.

[0059] It should be noted that the limiting guide post 404 is coated with an insulating coating on the outside, so when the two current conductive ends 403 are energized and move on the limiting guide post 404, there will be no leakage, the safety factor is high, and the design is more humane; and the movable plate 306 slides on the guide rod 105 through the sliding guide block 401, which can make the electrode repair mechanism more stable, avoid vibration damage and other fault phenomena, and improve the service life of the electric device.

[0060] like Figure 2 As shown, a plurality of U-shaped conductive plates 405 are arranged directly below the two current conducting ends 403, and a positive electrode material 406 and a negative electrode material 407 are arranged at the bottom of each U-shaped conductive plate 405. The positive electrode material 406 and the negative electrode material 407 on each U-shaped conductive plate 405 are modified graphite, stainless steel and titanium-coated ruthenium, respectively. The positive electrode material 406 and the negative electrode material 407 are placed above each soil remediation groove 106.

[0061] like Figure 2As shown, each of the U-shaped conductive plates 405 is connected to the insulating horizontal plate 409 via a hinge 408. A plurality of spring-fixed horizontal bars 501 are provided above the insulating horizontal plate 409. The end of each of the spring-fixed horizontal bars 501 is connected to one end of a second spring 502. The other end of the second spring 502 is connected to an insulating block 503. Each of the insulating blocks 503 is correspondingly provided on each of the U-shaped conductive plates 405. A current sensor is installed on each of the U-shaped conductive plates 405.

[0062] It should be noted that when the triangular connecting plate 301 drives the two current conductive ends 403 at the bottom of the power supply plate 308 to move downward vertically and contact the U-shaped conductive plate 405, the U-shaped conductive plate 405 is energized at this time, so that the positive electrode material 406 at the bottom of the U-shaped conductive plate 405 is positively charged and the negative electrode material 407 is negatively charged, and the U-shaped conductive plate 405 is subjected to downward pressure by the two current conductive ends 403. The hinge 408 causes the U-shaped conductive plate 405 to fold downward, so that the energized positive electrode material 406 and the negative electrode material 407 can contact the cadmium-contaminated soil sample to be repaired, realizing the interface behavior mechanism of cadmium-contaminated soil in the activator and electrode electric field system, studying the migration behavior and pattern of cadmium under the action of the electric field, forming a technical system for repairing cadmium-contaminated soil by activators and coordinated electric technology, improving the high-quality repair performance of cadmium-contaminated soil, and solving the problems of poor cadmium activity and weak electric field migration ability in cadmium-contaminated soil in southern rice fields. During the downward folding process, the second spring 502 simultaneously applies an upward return spring force to the U-shaped conductive plate 405, causing the U-shaped conductive plate 405 to have an upward return tendency. When the electrode completes the soil remediation, the cylinder 307 extends to cause the triangular connecting plate 301 to rotate upward, thereby driving the power supply plate 308 and the current conductive end 403 to move vertically upward, thereby removing the pressure applied to the U-shaped conductive plate 405. Under the return spring force of the second spring 502, the U-shaped conductive plate 405 folds upward and returns to its original position. The positive electrode material 406 and the negative electrode material 407 are synchronously returned to their original position upward, thereby separating from the cadmium-contaminated soil sample to be remediated, realizing the release of the electrode electric field and completing the activation-electrokinetic migration soil remediation action. This improves the intelligence level of the activator-cooperative electrokinetic remediation of cadmium-contaminated soil, reduces manual operation steps, avoids the occurrence of electrical accidents, and increases the safety factor.

[0063] It should be noted that, in view of the water and soil environment of paddy fields, by setting positive electrode materials 406 and negative electrode materials 407 such as modified graphite, stainless steel and titanium-coated ruthenium, these materials are new electrode materials with corrosion resistance and mechanical wear resistance, which can optimize system parameters and build a precise and complete electric repair system, thereby reflecting the migration behavior and pattern of cadmium under different electric fields, and the repair reliability is high.

[0064] Another aspect of the present invention provides a control method for an electric device for remediating cadmium-contaminated soil, which is applied to any one of the electric devices for remediating cadmium-contaminated soil, and comprises the following steps:

[0065] Obtain the actual cadmium pollution content of paddy field soil samples, and at the same time obtain the cadmium pollution content gradient map of paddy field soil based on the big data network;

[0066] Searching the cadmium pollution content level gradient map based on the actual cadmium pollution content to obtain a risk level corresponding to the actual cadmium pollution content, and determining whether the risk level corresponding to the actual cadmium pollution content is greater than a preset risk level;

[0067] If it is greater than, a knowledge graph of cadmium-contaminated soil remediation is obtained based on a big data network, and the risk level corresponding to the actual cadmium pollution content is imported into the knowledge graph of cadmium-contaminated soil remediation for identification to obtain one or more target activator parameters;

[0068] Obtaining historical repair rates corresponding to one or more target activator parameters, constructing a curve graph, importing the historical repair rates into the curve graph for plotting, and calculating the curvature of the historical repair rates for each target activator;

[0069] determining whether the curvature is greater than a preset curvature; if so, extracting target activator parameters corresponding to curvatures greater than the preset curvature to obtain screened target activator parameters; arranging the screened target activator parameters in ascending order based on the curvatures, and extracting the target activator parameter corresponding to the maximum curvature;

[0070] Based on the target activator parameter corresponding to the maximum curvature, the electromagnetic control module below the target activator storage tank is powered on and regulated to enable the target activator storage tank to add the activator in a quantitative manner. The electric field strength error between the current electric field strength on the electrode material and the required electric field strength is analyzed according to the target activator parameter corresponding to the maximum curvature, and the electrode power supply device is regulated based on the electric field strength error.

[0071] It should be noted that traditional methods for remediating cadmium-contaminated soil are usually direct applications of chemical stabilization, thermal decomposition absorption, and electrochemical remediation. Some methods will collaboratively use plants that have the ability to absorb, accumulate, or transfer cadmium to collaboratively migrate cadmium pollution. However, these methods usually have poor migration performance for cadmium in the soil and cannot completely reduce the cadmium enriched in the soil, resulting in poor remediation performance. Therefore, cadmium-contaminated soil can be activated by different types of activators, and cadmium can be efficiently migrated under the action of a synergistic electric field, thereby improving the remediation quality and efficiency of cadmium-contaminated soil. However, soils with different cadmium pollution contents require the selection of activators with different types of parameters for activation to ensure that the electrode electric field can exert an efficient migration effect on the activated cadmium-contaminated soil. First, the actual cadmium pollution content of paddy field soil samples is measured. Determine the corresponding risk level, and then judge whether the corresponding risk level is greater than the preset risk level. If it is greater, it means that the cadmium pollution content in the paddy soil sample seriously exceeds the standard and is moderate to severe pollution. A specific activator needs to be selected for activation. Then, identify one or more target activator parameters corresponding to the current risk level in the knowledge graph. Finally, screen according to the historical repair rate of each target activator parameter, and adjust the electromagnetic control module according to the screened target activator parameters to make the target activator storage tank quantitatively add activator, realize the precise addition of activator, make the selection and addition of activator more intelligent, greatly improve the accuracy and quality of cadmium-contaminated soil remediation, avoid the frequency of repair errors, and have high reliability.

[0072] Furthermore, in a preferred embodiment of the present invention, analyzing the electric field intensity error between the current electric field intensity on the electrode material and the required electric field intensity based on the target activator parameter corresponding to the maximum curvature, and regulating the electrode power supply device based on the electric field intensity error, specifically includes the following steps:

[0073] Obtaining information about the type of electrode material, and obtaining the conductivity of the motor material type based on a big data network;

[0074] Obtaining the current power supply current of the electrode power supply device, and calculating the electric field strength on the current electrode material by combining the current power supply current of the electrode power supply device and the conductivity;

[0075] Obtaining the remediation requirements for cadmium-contaminated soil, identifying the target activator parameter corresponding to the maximum curvature in the cadmium-contaminated soil remediation knowledge graph, obtaining the activation coefficient of the target activator parameter corresponding to the maximum curvature, and calculating the required electric field strength based on the remediation requirements for cadmium-contaminated soil and the activation coefficient;

[0076] Calculate the deviation between the current electric field strength on the electrode material and the required electric field strength to obtain a deviation rate value, and determine whether the deviation rate value is greater than a preset deviation rate threshold. If it is greater, introduce a hash algorithm to calculate the hash value between the deviation rate value and the preset deviation rate threshold, and regulate the electrode power supply device based on the hash value until the required electric field strength is reached.

[0077] It should be noted that in order to achieve high-quality activation and migration of cadmium pollution in soil, on the one hand, it is necessary to select a suitable activator to ensure the activation coefficient of soil cadmium pollution, and on the other hand, it is necessary to apply a corresponding electric field strength to the soil to coordinate the activation coefficient, thereby further improving the driving effect of interfacial behaviors such as physical and chemical adsorption, ion exchange and electromigration of cadmium pollution; first, the corresponding conductivity is obtained through the type information of the electrode material. The conductivity reflects the amount of current, and then the electric field strength on the current electrode material is calculated through the conductivity and the power supply current of the current electrode power supply device. By judging whether the electric field strength on the current electrode material meets the required electric field strength for the remediation of cadmium-contaminated soil, The deviation rate value of the current electric field strength on the electrode material and the required electric field strength is calculated. If the deviation rate value is greater than the preset deviation rate threshold, it means that there is a large gap between the current electric field strength on the electrode material and the required electric field strength. Therefore, the electric field strength on the current electrode material is difficult to coordinate with the activation coefficient of the target activator, resulting in the inability to achieve high-quality migration of cadmium pollution in the soil. Therefore, the electrode power supply device needs to be regulated to make the current electric field strength on the electrode material tend to the required electric field strength, improve the electric migration performance of cadmium pollution, ensure that the cadmium pollution in the soil can be completely repaired, solve the problem of severe cadmium pollution in the soil, and have a high degree of intelligence and good economic benefits.

[0078] The above description of the preferred embodiments of the present invention is provided as a guide, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An electric device for remediating cadmium-contaminated soil, comprising a housing, an activator addition module, and an electrode repair mechanism, characterized in that: The housing includes an insulating partition, a screw is installed in the middle of the insulating partition, the end of the screw is connected to a servo motor, a guide rod is provided directly below the screw, an electrode repair mechanism is installed on the guide rod, an activator addition module is fixed on the top of the housing, and a plurality of soil repair grooves are opened at the bottom of the housing; The activator adding module includes a disc funnel, a plurality of slide rails are provided inside the disc funnel, a slider is installed on each slide rail, one end of a connecting rod is welded to the top of the slider, and an electromagnetic control module is fixed to the other end of the connecting rod; The electrode repair mechanism includes a triangular connecting plate, on which a first connecting hole, a second connecting hole, and a third connecting hole are provided. The first connecting hole is connected to a fixed column, which is provided on a movable plate. The second connecting hole is connected to the top of an output rod of a cylinder, which passes through a circular through hole, which is provided on the movable plate. The cylinder is fixed to the bottom of the movable plate. The third connecting hole is connected to the bottom of a power supply plate. The power supply board is connected to the electrode power supply device via a wire, and the bottom of the power supply board is provided with two current conductive ends, which are placed in the limiting guide pillars, and the limiting guide pillars are fixed to the movable plate; A plurality of U-shaped conductive plates are provided directly below the two current conducting ends, and a positive electrode material and a negative electrode material are provided at the bottom of each U-shaped conductive plate. The positive electrode material and the negative electrode material on each U-shaped conductive plate are modified graphite, stainless steel, and titanium-coated ruthenium, respectively. The positive electrode material and the negative electrode material are placed above each soil remediation tank; Each of the U-shaped conductive plates is connected to the insulating horizontal plate through a hinge. A plurality of spring-fixed horizontal bars are provided above the insulating horizontal plate. The end of each of the spring-fixed horizontal bars is connected to one end of a second spring, and the other end of the second spring is connected to an insulating block. Each of the insulating blocks is correspondingly arranged on each of the U-shaped conductive plates, and a current sensor is installed on each of the U-shaped conductive plates.

2. The electric device for remediation of cadmium-contaminated soil according to claim 1, characterized in that: The electromagnetic control module includes a liquid blocking plug, a metal core is provided inside the liquid blocking plug, and an energized conductive coil is wound around the outside of the metal core. The energized conductive coil is connected to a control system.

3. The electric device for remediation of cadmium-contaminated soil according to claim 2, characterized in that: One end of a first spring is fixed to the side of each electromagnetic control module, and the other end of the first spring is connected to the side wall of the disc funnel. A plurality of activator storage tanks are arranged on the top of the disc funnel.

4. The electric device for remediation of cadmium-contaminated soil according to claim 3, characterized in that: The outlet of each activator storage tank is placed above the liquid blocking plug, a permanent magnet is arranged in the middle of the disc funnel, and a liquid outlet conduit is connected to the bottom of the disc funnel.

5. The electric device for remediation of cadmium-contaminated soil according to claim 1, characterized in that: The movable plate is provided with a screw nut, and the screw nut is installed on the screw rod. The movable plate is provided with a sliding guide block, and the sliding guide block is connected to the guide rod.

6. A control method for an electric device for remediation of cadmium-contaminated soil, applied to an electric device for remediation of cadmium-contaminated soil according to any one of claims 1 to 5, characterized in that: The steps include: Obtain the actual cadmium pollution content of paddy field soil samples, and at the same time obtain the cadmium pollution content gradient map of paddy field soil based on the big data network; Searching the cadmium pollution content level gradient map based on the actual cadmium pollution content to obtain a risk level corresponding to the actual cadmium pollution content, and determining whether the risk level corresponding to the actual cadmium pollution content is greater than a preset risk level; If it is greater than, a knowledge graph of cadmium-contaminated soil remediation is obtained based on a big data network, and the risk level corresponding to the actual cadmium pollution content is imported into the knowledge graph of cadmium-contaminated soil remediation for identification to obtain one or more target activator parameters; Obtaining historical repair rates corresponding to one or more target activator parameters, constructing a curve graph, importing the historical repair rates into the curve graph for plotting, and calculating the curvature of the historical repair rates for each target activator; determining whether the curvature is greater than a preset curvature; if so, extracting target activator parameters corresponding to curvatures greater than the preset curvature to obtain screened target activator parameters; arranging the screened target activator parameters in ascending order based on the curvatures, and extracting the target activator parameter corresponding to the maximum curvature; Based on the target activator parameter corresponding to the maximum curvature, the electromagnetic control module below the target activator storage tank is powered on and regulated to enable the target activator storage tank to add the activator in a quantitative manner. The electric field strength error between the current electric field strength on the electrode material and the required electric field strength is analyzed according to the target activator parameter corresponding to the maximum curvature, and the electrode power supply device is regulated based on the electric field strength error.

7. The control method of the electric device for remediation of cadmium-contaminated soil according to claim 6, characterized in that: The method of analyzing the electric field intensity error between the current electric field intensity on the electrode material and the required electric field intensity according to the target activator parameter corresponding to the maximum curvature, and regulating the electrode power supply device based on the electric field intensity error, specifically includes the following steps: Obtaining information about the type of electrode material, and obtaining the conductivity of the motor material type based on a big data network; Obtaining the current power supply current of the electrode power supply device, and calculating the electric field strength on the current electrode material by combining the current power supply current of the electrode power supply device and the conductivity; Obtaining the remediation requirements for cadmium-contaminated soil, identifying the target activator parameter corresponding to the maximum curvature in the cadmium-contaminated soil remediation knowledge graph, obtaining the activation coefficient of the target activator parameter corresponding to the maximum curvature, and calculating the required electric field strength based on the remediation requirements for cadmium-contaminated soil and the activation coefficient; Calculate the deviation between the current electric field strength on the electrode material and the required electric field strength to obtain a deviation rate value, and determine whether the deviation rate value is greater than a preset deviation rate threshold. If it is greater, introduce a hash algorithm to calculate the hash value between the deviation rate value and the preset deviation rate threshold, and regulate the electrode power supply device based on the hash value until the required electric field strength is reached.

Images