Electric device for remediation of cadmium-polluted soil and control method of electric device

Abstract

The invention relates to an electric device for cadmium-contaminated soil remediation and a control method of the electric device, and belongs to the technical field of environmental governance. A machine shell comprises an insulating partition plate, a lead screw is installed in the middle of the insulating partition plate, the tail end of the lead screw is connected with a servo motor, and a guide rod is arranged under the lead screw; an electrode repairing mechanism is installed on the guide rod, an activating agent adding module is fixed to the top of the machine shell, and a plurality of soil repairing grooves are formed in the bottom of the machine shell; the activating agent adding module comprises a disc funnel, a plurality of sliding rails are arranged in the disc funnel, a sliding block is installed on each sliding rail, one end of a connecting rod is welded to the top of each sliding block, and an electromagnetic control module is fixed to the other end of each connecting rod. According to the method, the activating agent can be intelligently selected for activation according to cadmium pollution in a soil sample, electric field regulation migration is carried out on active cadmium in activated soil, and the technology that the activating agent cooperates with electric migration to efficiently repair soil cadmium pollution is achieved.

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. The main sources of cadmium include industrial wastewater, waste, pesticides, and coal burning. The reasons for the enrichment of cadmium in soil include factors such as soil inorganic chemical characteristics and land use patterns. Paddy field cadmium pollution refers to the phenomenon that the cadmium content in the soil is too high, which is then absorbed by rice, causing the cadmium content of rice to exceed the standard. Cadmium pollution in typical paddy field soils in the south is particularly prominent. In view of the lack of rapid reduction technology for cadmium-contaminated soils in southern paddy fields, cadmium pollution in typical paddy field soils in the south can be repaired by using different activators and electric technology of various materials, building an efficient electric repair system, and studying the electric field migration laws and mechanisms of activators and different forms of cadmium. However, there is still a lack of electric devices for this technology. Traditionally, manual activator selection and manual production or manipulation of electrode equipment are required, with low repair efficiency, high electrode operation risk factor, potential safety hazards, and unsatisfactory repair effect on cadmium-contaminated soil, which cannot achieve the expected repair goals. Therefore, it is necessary to develop an electric device that can efficiently and safely repair cadmium-contaminated soil to solve the above problems. 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] To achieve the above object, the technical solution adopted by the present invention is:

[0005] The first aspect of the present invention provides an electric device for remediating cadmium-contaminated soil, the electric device comprising a housing, an activator adding 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 arranged directly below the screw, an electrode repair mechanism is installed on the guide rod, an activator adding 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 comprises a disc funnel, a plurality of slide rails are arranged inside the disc funnel, a slider is installed on each of the slide rails, one end of a connecting rod is welded on the top of the slider, and an electromagnetic control module is fixed on 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 arranged. The first connecting hole is connected to a fixed column, and the fixed column is arranged on a movable plate. The second connecting hole is connected to the top of an output rod of a cylinder, and the output rod of the cylinder passes through a circular through hole, and the circular through hole is arranged 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 a 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, a current-carrying conductive coil is wound around the outside of the metal core, and the current-carrying conductive coil is connected to a 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 arranged 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 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.

[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 top of the power board is connected to the electrode power supply device 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 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 groove.

[0015] Furthermore, in a preferred embodiment of the present invention, each of the U-shaped conductive plates is connected to the insulating cross plate by 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 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 the 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 the 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, so as 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 rate of each target activator;

[0021] Determine whether the curvature is greater than a preset curvature, if greater than, extract the target activator parameter corresponding to the curvature greater than the preset curvature to obtain the screened target activator parameter, arrange the screened target activator parameters in ascending order based on the curvature, and extract 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 so that the target activator storage tank can 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, the electric field strength error between the electric field strength on the current 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, specifically comprising the following steps:

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

[0025] Obtaining the power supply current of the current electrode power supply device, and calculating in combination with the power supply current and conductivity of the current electrode power supply device to obtain the electric field strength on the current electrode material;

[0026] Obtain the remediation requirements for cadmium-contaminated soil, identify the target activator parameter corresponding to the maximum curvature in the cadmium-contaminated soil remediation knowledge graph, obtain the activation coefficient of the target activator parameter corresponding to the maximum curvature, and calculate according to the remediation requirements for cadmium-contaminated soil and the activation coefficient to obtain the required electric field strength;

[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 so, introduce a hash algorithm to calculate a hash value between the deviation rate value and the preset deviation rate threshold, and adjust 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 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 conduit, 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, and at this time, the two current conductive ends contact the U-shaped conductive plate to make the positive and negative electrode materials 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, so that the positive and negative electrode materials after being energized can contact the soil sample to be repaired, and the cadmium pollution in the soil sample is electrically migrated, thereby realizing the efficient remediation technology of coordinated electric migration of the activator. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the electric device;

[0032] Figure 2 It is a 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 The overall structural diagram 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 activating agent 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] Fig. 9 It is a structural schematic diagram of the triangular connecting plate.

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

[0041] 101, housing; 102, insulating partition; 103, screw rod; 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, conductive coil; 206, first spring; 207, activator storage tank; 208, permanent magnet; 209, liquid outlet conduit; 301, triangular connecting plate; 302, first connecting hole; 303, second connecting Hole; 304, the third connecting hole; 305, the fixed column; 306, the moving plate; 307, the cylinder; 308, the power board; 309, the screw nut; 401, the sliding guide block; 402, the electrode power supply device; 403, the current conducting end; 404, the limiting guide column; 405, the U-shaped conductive plate; 406, the positive electrode material; 407, the negative electrode material; 408, the hinge; 409, the insulating cross plate; 501, the spring fixing cross bar; 502, the second spring; 503, the insulating block; 504, the control system; 505, the circular through hole. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the structures related to the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

[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", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0045] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0046] like Figure 1 As shown, the first aspect of the present invention provides an electric device for remediation of cadmium-contaminated soil, the electric device comprising 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 arranged directly below the screw rod 103, 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 by using the existing sampling technology, and the number of sampling groups corresponds to the soil remediation groove. The sampled cadmium-contaminated soil samples to be repaired are placed on the desktop, and then the electric device is moved and placed directly above the cadmium-contaminated soil samples 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 samples 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 of cadmium-contaminated soil samples, and is highly portable; and since the electrode repair mechanism requires the electrodes to be powered on, 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 powered on for repair, thereby improving the safety factor and having high reliability.

[0049] like Figure 1 , 5 As shown in FIG. 6 , the activator adding module includes a disc funnel 107 , and a plurality of slide rails 108 are arranged 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 arranged inside the liquid blocking plug 203 , a current-carrying conductive coil 205 is wound around the outside of the metal core 204 , and the current-carrying conductive coil 205 is connected to a 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 arranged 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 arranged 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 coordination 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 move the electromagnetic control module 202 Attracted, the slider 109 slides 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 accurate addition of the target activator and combine it with the cadmium-contaminated soil to be remediated in the target soil remediation tank 106, so as to 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, so that the electromagnetic control module 202 generates a reset force in the opposite direction. When the power is turned off to the energized conductive coil 205, 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 liquid plug 203 on the electromagnetic control module 202 blocks the liquid outlet of the target activator storage tank 207 again to stop the addition of the activator, realize the intelligent control effect of automatic addition of the activator, replace the manual selection and addition steps, save time and effort, improve the remediation accuracy and rate of cadmium-contaminated soil, and avoid the addition error of the activator; it should be supplemented that the activator in the activator storage tank 207 is a green, efficient natural small molecule 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 a fixed column 305, and the fixed column 305 is arranged on a movable plate 306, the second connecting hole 303 is connected to the top of the output rod of the cylinder 307, the output rod of the cylinder 307 passes through a circular through hole 505, the circular through hole 505 is arranged on the movable plate 306, and the cylinder 307 is fixed to the bottom of the movable plate 306, and the third connecting hole 304 is connected to the bottom of the power board 308.

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

[0057] like Figure 2 , 3 As shown, the power 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 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 electrode repair of the cadmium-contaminated soil to be 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 conduit 209 of the activator adding 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 repair 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 through the power supply board, respectively, 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 rotate downward by a certain angle through the second connecting hole 303, and the triangular connecting plate 301 will rotate 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, so as to achieve 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 column 404 is coated with an insulating coating on the outside, so there will be no leakage when the two current conductive ends 403 move on the limiting guide column 404 after power is turned on. 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, and 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, and 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, and the other end of the second spring 502 is connected to an insulating block 503. Each of the insulating blocks 503 is correspondingly arranged on each of the U-shaped conductive plates 405, and 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 vertically downward 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, and the U-shaped conductive plate 405 is folded downward through the action of the hinge 408, so that the positive electrode material 406 and the negative electrode material 407 after being energized can contact the cadmium-contaminated soil sample to be repaired, realizing the interface behavior mechanism of physicochemical adsorption, ion exchange and electromigration of cadmium-contaminated soil in the activator and electrode electric field system, studying the migration behavior and mode of cadmium under the action of the electric field, forming a technical system for repairing cadmium-contaminated soil by activators and electrokinetic 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, so that the U-shaped conductive plate 405 has a tendency to return upward. When the electrode completes the soil repair, the cylinder 307 extends to cause the triangular connecting plate 301 to rotate upward, so as to drive the power supply plate 308 and the current conductive end 403 to move vertically upward, thereby canceling 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 to separate from the cadmium-contaminated soil sample to be repaired, thereby realizing the release of the electrode electric field and completing the activation-electric migration soil repair action. This improves the intelligence level of the activator-electrical repair 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 material 406 and negative electrode material 407 of modified graphite, stainless steel and other electrode materials, 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 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 the 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 the 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, so as 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 rate of each target activator;

[0069] Determine whether the curvature is greater than a preset curvature, if greater than, extract the target activator parameter corresponding to the curvature greater than the preset curvature to obtain the screened target activator parameter, arrange the screened target activator parameters in ascending order based on the curvature, and extract 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 so that the target activator storage tank can 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 application of chemical stabilization, thermal decomposition absorption, and electrochemical remediation. Some of them will synergistically use plants that have the ability to absorb, accumulate or transfer cadmium to coordinate the migration of cadmium pollution, but these methods usually have poor migration performance for cadmium in the soil, and cannot completely reduce the cadmium enriched in the soil, and the remediation performance is poor; 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 play 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 determine whether the corresponding risk level is greater than the preset risk level. If greater than, it means that the cadmium pollution content in the paddy field soil sample seriously exceeds the standard and belongs to medium to severe pollution. Specific activators need to be selected for activation. Then, identify one or more target activator parameters corresponding to the current risk level of the repair in the knowledge graph, and finally screen according to the historical repair rate of each target activator parameter. According to the screened target activator parameters, the electromagnetic control module is adjusted to make the target activator storage tank quantitatively add the activator, and realize the precise addition of the activator. This can make the selection and addition of the activator more intelligent, greatly improve the accuracy and quality of the repair of cadmium-contaminated soil, avoid the frequency of repair errors, and have high reliability.

[0072] Furthermore, in a preferred embodiment of the present invention, the electric field strength error between the electric field strength on the current 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, specifically comprising the following steps:

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

[0074] Obtaining the power supply current of the current electrode power supply device, and calculating in combination with the power supply current and conductivity of the current electrode power supply device to obtain the electric field strength on the current electrode material;

[0075] Obtain the remediation requirements for cadmium-contaminated soil, identify the target activator parameter corresponding to the maximum curvature in the cadmium-contaminated soil remediation knowledge graph, obtain the activation coefficient of the target activator parameter corresponding to the maximum curvature, and calculate according to the remediation requirements for cadmium-contaminated soil and the activation coefficient to obtain the required electric field strength;

[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 so, introduce a hash algorithm to calculate a hash value between the deviation rate value and the preset deviation rate threshold, and adjust 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 suitable activators to ensure the activation coefficient of soil cadmium pollution, and on the other hand, it is necessary to apply the corresponding electric field strength to the soil to coordinate the activation coefficient, so as to further improve the driving effect of interface behaviors such as physical and chemical adsorption, ion exchange and electromigration of cadmium pollution; first, the corresponding conductivity is obtained through the electrode material type information, and 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, and by judging whether the electric field strength on the current electrode material meets the required electric field strength required 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 approach 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 intelligent electric control and good economic benefits.

[0078] The above is based on the ideal embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. An electric device for remediation of cadmium-contaminated soil, comprising a housing, an activator adding 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 arranged directly below the screw, an electrode repair mechanism is installed on the guide rod, an activator adding 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 comprises a disc funnel, a plurality of slide rails are arranged inside the disc funnel, a slider is installed on each of the slide rails, one end of a connecting rod is welded on the top of the slider, and an electromagnetic control module is fixed on 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 arranged. The first connecting hole is connected to a fixed column, and the fixed column is arranged on a movable plate. The second connecting hole is connected to the top of an output rod of a cylinder, and the output rod of the cylinder passes through a circular through hole, and the circular through hole is arranged 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 a power supply board.

2. The electric device for remediation of cadmium-contaminated soil according to claim 1, characterized in that: The electromagnetic control module comprises a liquid blocking plug, a metal core is arranged inside the liquid blocking plug, a conductive coil is wound around the outside of the metal core, and the 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, the screw nut is mounted on the screw, and the movable plate is provided with a sliding guide block, the sliding guide block is connected to the guide rod.

6. The electric device for remediation of cadmium-contaminated soil according to claim 1, characterized in that: The top of the power board is connected to the electrode power supply device through a wire, and two current conducting ends are arranged at the bottom of the power board. The two current conducting ends are placed in the limiting guide pillars, and the limiting guide pillars are fixed on the moving plate.

7. The electric device for remediation of cadmium-contaminated soil according to claim 6, characterized in that: 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. The positive electrode material and the negative electrode material are placed above each soil remediation groove.

8. The electric device for remediation of cadmium-contaminated soil according to claim 7, characterized in that: Each of the U-shaped conductive plates is connected to an insulating horizontal plate through a hinge. A plurality of spring-fixed horizontal bars are located above the insulating horizontal plate. The end of each of the spring-fixed horizontal bars is connected to one end of a second spring. 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. A current sensor is installed on each of the U-shaped conductive plates.

9. 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 8, characterized in that: The steps include: Obtain the actual cadmium pollution content of paddy field soil samples, and 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 the 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 the 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, so as 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 rate of each target activator; Determine whether the curvature is greater than a preset curvature, if greater than, extract the target activator parameter corresponding to the curvature greater than the preset curvature to obtain the screened target activator parameter, arrange the screened target activator parameters in ascending order based on the curvature, and extract 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 so that the target activator storage tank can 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.

10. The control method of the electric device for remediation of cadmium-contaminated soil according to claim 9, characterized in that: 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, specifically including the following steps: Obtaining information on the type of electrode material, and obtaining the conductivity of the type of motor material based on a big data network; Obtaining the power supply current of the current electrode power supply device, and calculating in combination with the power supply current and conductivity of the current electrode power supply device to obtain the electric field strength on the current electrode material; Obtain the remediation requirements for cadmium-contaminated soil, identify the target activator parameter corresponding to the maximum curvature in the cadmium-contaminated soil remediation knowledge graph, obtain the activation coefficient of the target activator parameter corresponding to the maximum curvature, and calculate according to the remediation requirements for cadmium-contaminated soil and the activation coefficient to obtain the required electric field strength; 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 so, introduce a hash algorithm to calculate a hash value between the deviation rate value and the preset deviation rate threshold, and adjust the electrode power supply device based on the hash value until the required electric field strength is reached.

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