Magnetic separation construction method, system and equipment for heavy metal contaminated soil

Abstract

The invention relates to the field of soil treatment, and provides a magnetic separation construction method, system and equipment for heavy metal contaminated soil, and the method comprises the following steps: determining a contaminated land parcel, measuring pollutant data of the contaminated land parcel, and establishing a heavy metal magnetic conceptual model through the pollutant data; calculating the comprehensive magnetism of the polluted plot according to the heavy metal magnetism conceptual model, and selecting a to-be-magnetized plot according to the comprehensive magnetism; calculating the total magnetism evaluation of the to-be-magnetized land parcel, selecting a magnetism increasing agent according to the total magnetism, and calculating the agent dosage of the magnetism increasing agent; a construction task package is generated according to the agent dosage, the magnetism increasing agent and the heavy metal magnetism conceptual model, construction units are selected, and magnetic separation purification equipment is formed through the construction units; the heavy metal contaminated soil is collected, magnetic increasing and magnetic separation are conducted on the heavy metal contaminated soil through the magnetic separation purification equipment according to the construction task package, and purification of the heavy metal contaminated soil can be completed.

Description

Technical Field

[0001] This invention relates to the field of soil treatment technology, and in particular to a magnetic separation construction method, system and equipment for heavy metal contaminated soil. Background Technology

[0002] The heavy metal pollution problem left over from the development of the steel industry has become increasingly prominent. Historically, over-exploitation has caused serious damage to the surrounding environment, especially through water, air, and soil, leading to the accumulation of heavy metals in surrounding crops and native plants. Heavy metals are characterized by being difficult to degrade, easily accumulating, and highly hazardous, exerting indirect and direct toxic effects on local flora and fauna. Through bioaccumulation and amplification effects in the food chain, they pose serious threats to human health and severely impact land use.

[0003] Unlike organic pollution, heavy metal pollution involves stronger interactions between soil particles and is also related to the valence state of the heavy metals. Generally, the mechanisms by which soil immobilizes heavy metals are twofold: first, heavy metals are adsorbed onto the surface of soil components in an ionic state; second, heavy metals exist in the soil by forming compound precipitates. Magnetic separation can effectively remove heavy metals from soil, but when the magnetic properties of the heavy metal components are insufficient, it is difficult to separate them using magnetic separation. Magnetizing agents can enhance the magnetic properties of the soil, but the selection and application of these agents often rely on experience, frequently leading to poor removal results or wasted agents. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention provides a magnetic separation method, system, and equipment for heavy metal contaminated soil, which automatically selects a magnetic agent based on the soil's contamination level and removes heavy metal contamination from the soil through magnetic separation after the magnetic agent is applied.

[0005] This invention provides a magnetic separation construction method for heavy metal contaminated soil, comprising: S1: Identify contaminated sites, measure pollutant data from the contaminated sites, and establish a magnetic conceptual model of heavy metals based on the pollutant data; S2: Calculate the comprehensive magnetism of the contaminated site based on the heavy metal magnetism conceptual model, and select the site to be magnetized based on the comprehensive magnetism; S3: Calculate the total magnetic content of the plot to be magnetized, select magnetizing agents based on the total magnetic content, and calculate the dosage of the magnetizing agents. S4: Generate a construction task package based on the dosage of the reagent, the magnetizing agent, and the magnetic concept model of heavy metals; select construction units; and assemble magnetic separation and purification equipment through the construction units. S5: Collect soil samples contaminated with heavy metals, and according to the construction task package, use magnetic separation equipment to magnetize and separate the soil to complete the purification of the soil contaminated with heavy metals.

[0006] According to the magnetic separation construction method for heavy metal contaminated soil provided by the present invention, in step S1, the heavy metal magnetic conceptual model includes the occurrence form of the target pollutant heavy metal and the magnetic parameters of the target pollutant.

[0007] According to the magnetic separation construction method for heavy metal contaminated soil provided by the present invention, in step S2, the calculation method for the comprehensive magnetic field P is as follows: in, The average concentration of the target pollutant, The target pollutant concentration is determined by its magnetic valence state. The basic magnetic properties of the target pollutant, Based on the magnetic weighting coefficient, It is a variable magnetic valence state magnetism. is the variable magnetic weighting coefficient.

[0008] According to the magnetic separation construction method for heavy metal contaminated soil provided by the present invention, in step S3, the calculation method for the total magnetic content evaluation S is as follows: in, To contaminate the soil volume, Where is the soil bulk density, and K is the weighting coefficient for the coupling difficulty of the magnetizing agent.

[0009] According to the magnetic separation construction method for heavy metal contaminated soil provided by the present invention, in step S3, the method for calculating the reagent dosage W is as follows: in, This represents the maximum concentration of pollutants. For screening pollutant factors, For Gibbs free energy change.

[0010] According to the present invention, a magnetic separation construction method for heavy metal contaminated soil is provided. In step S4, the construction task package includes magnetic field strength, soil particle size, soil spreading thickness, reagent dosage and operation mode; the construction unit includes a feeding hopper, a crusher and a magnetic separator, and the feeding hopper, crusher and magnetic separator are connected by a conveyor belt.

[0011] This invention also provides a magnetic separation construction system for heavy metal contaminated soil, comprising: Data acquisition module: used to identify contaminated sites, measure pollutant data of contaminated sites, and establish a magnetic conceptual model of heavy metals based on pollutant data; Site selection module: used to calculate the comprehensive magnetism of contaminated sites based on the heavy metal magnetic conceptual model, and select sites to be magnetized based on the comprehensive magnetism; Parameter calculation module: used to calculate the total magnetic content of the land parcel to be magnetized, select magnetizing agents based on the total magnetic content, and calculate the dosage of the magnetizing agents; Construction Task Package Module: This module is used to generate construction task packages based on reagent dosage, magnetizing agent, and heavy metal magnetic concept model, select construction units, and assemble magnetic separation purification equipment using these construction units. Soil magnetic separation module: Used to collect soil contaminated with heavy metals, and to purify the soil contaminated with heavy metals by magnetizing and separating it according to the construction task package and using magnetic separation purification equipment.

[0012] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of a magnetic separation construction method for heavy metal contaminated soil as described above.

[0013] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a magnetic separation construction method for heavy metal contaminated soil as described above.

[0014] The present invention also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, which, when executed by a computer, enable the computer to perform the steps of a magnetic separation construction method for heavy metal contaminated soil as described above.

[0015] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: This invention provides a magnetic separation construction method, system, and equipment for heavy metal contaminated soil. By calculating the comprehensive magnetic properties of the contaminated plots, it effectively screens out plots that need to be magnetized with reagents. Based on the concentration and valence state of the heavy metal pollutants, it automatically selects a suitable magnetizing reagent and an appropriate dosage, thereby generating a construction task package. The construction unit can then magnetize and magnetically separate the heavy metal contaminated soil according to the construction task package, thereby eliminating heavy metal pollution.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a magnetic separation construction method for heavy metal contaminated soil provided by the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of a magnetic separation construction system for heavy metal contaminated soil provided by the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of a magnetic separation construction device for heavy metal contaminated soil provided by the present invention.

[0021] Figure label: 100. Data acquisition module; 200. Plot selection module; 300. Parameter calculation module; 400. Construction task package module; 500. Soil magnetic separation module; 810. Processor; 820. Communication interface; 830. Memory; 840. Communication bus. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention. The following embodiments are used to illustrate this invention but cannot be used to limit the scope of this invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0026] The following is combined Figures 1 to 3 Specific embodiments of the present invention are described below. Figure 1 This is a schematic flowchart of a magnetic separation construction method for heavy metal contaminated soil provided by the present invention, including: S1: Identify contaminated sites, measure pollutant data from the contaminated sites, and establish a magnetic conceptual model of heavy metals based on the pollutant data; Furthermore, the objective of this stage is to measure pollutant data from the contaminated site, thereby establishing a magnetic conceptual model of heavy metals. Specifically, in step S1, the magnetic conceptual model of heavy metals includes the occurrence form of the target pollutant heavy metals and the magnetic parameters of the target pollutant.

[0027] The specific implementation method for the above steps in this embodiment is as follows: First, land contaminated with heavy metals needs to be selected as the contaminated site. Then, the concentration of pollutants and their corresponding screening values ​​in the contaminated site need to be measured according to standard methods, and heavy metal speciation and magnetic analysis need to be performed. Next, the pollutant data is preprocessed and converted into template data that can be recognized by the system. Then, it can be input into the data conversion system, which will convert it into a heavy metal magnetic conceptual model. The heavy metal magnetic conceptual model includes the occurrence speciation of the target pollutant heavy metal and the magnetic parameters of the target pollutant. It may also include the content of each valence state of the target pollutant in the soil, the content of the variable magnetic valence state of the target pollutant, and the coupling reaction barrier between the target pollutant and magnetic materials.

[0028] S2: Calculate the comprehensive magnetism of the contaminated site based on the heavy metal magnetism conceptual model, and select the site to be magnetized based on the comprehensive magnetism; Furthermore, the objective of this stage is to calculate the comprehensive magnetic properties of the contaminated sites, thereby selecting sites with enhanced magnetization. Specifically, in step S2, the method for calculating the comprehensive magnetic properties P is as follows: in, The average concentration of the target pollutant, The target pollutant concentration is determined by its magnetic valence state. The basic magnetic properties of the target pollutant, Based on the magnetic weighting coefficient, It is a variable magnetic valence state magnetism. is the variable magnetic weighting coefficient.

[0029] The specific implementation method for the above steps in this embodiment is as follows: Here, it is necessary to obtain parameters such as the average concentration of the target pollutant in the contaminated site and the concentration of the target pollutant under various magnetic valence states from the heavy metal magnetic conceptual model, so as to calculate the comprehensive magnetic field P of the contaminated site. The calculation method is as follows: in, The average concentration of the target pollutant, The target pollutant concentration is determined by its magnetic valence state. The basic magnetic properties of the target pollutant, The basic magnetic weighting coefficient is determined based on experience. It is a variable magnetic valence state magnetism. The variable magnetic weighting coefficient is determined empirically.

[0030] In this context, the concentration of the target pollutant in its magnetic valence state is the concentration of the magnetic heavy metal pollutant in that valence state, and the basic magnetism of the target pollutant is the basic magnetism of the heavy metal pollutant. The magnetism of the variable magnetic valence state is the magnetism of the target pollutant in that valence state. When the target pollutant, i.e., the heavy metal pollutant, has multiple magnetic valence states, it is necessary to substitute the magnetism of the heavy metal pollutant in each valence state and sum them to obtain the comprehensive magnetism.

[0031] After calculating the comprehensive magnetic properties of the contaminated site, if the comprehensive magnetic properties are lower than the comprehensive magnetic threshold determined by needs and experience, the site is determined to be a site that needs to be magnetized. Its magnetic properties are insufficient for sufficient magnetic separation, and it is necessary to enhance its magnetic properties by coupling the magnetizing agent with the heavy metal pollutants. Otherwise, it is considered that it does not need to be magnetized and can be directly separated by magnetic separation.

[0032] S3: Calculate the total magnetic content of the plot to be magnetized, select magnetizing agents based on the total magnetic content, and calculate the dosage of the magnetizing agents. Furthermore, the objective of this stage is to calculate the total magnetic flux of the land parcel to be magnetized, thereby selecting magnetizing agents and calculating the agent dosage. Specifically, in step S3, the calculation method for the total magnetic flux evaluation S is as follows: in, To contaminate the soil volume, Where is the soil bulk density, and K is the weighting coefficient for the coupling difficulty of the magnetizing agent.

[0033] In step S3, the method for calculating the drug dosage W is as follows: in, This represents the maximum concentration of pollutants. For screening pollutant factors, For Gibbs free energy change.

[0034] The specific implementation method for the above steps in this embodiment is as follows: When the contaminated site is a site to be magnetized, the first step is to calculate the total magnetic flux S of the site to be magnetized. in, To contaminate the soil volume, Let K be the soil bulk density, and K be the weighting coefficient for the coupling difficulty of the magnetizing agent. The weighting coefficient for the coupling difficulty of the magnetizing agent is calculated by dividing the reaction energy barrier of the variable magnetism of the heavy metal pollutant by the reaction energy level of the magnetizing agent, and is assigned a weighting coefficient of 1-10 using an assignment method. Here, it is also necessary to substitute the magnetism of the heavy metal pollutant at each valence state and sum them up.

[0035] This allows for the calculation of the total magnetic flux when using various magnetizing agents, and the top three scoring agents are then recommended for the user to choose from. This enables the selection of the appropriate magnetizing agent for the site to be magnetized. The dosage W of the magnetizing agent can then be calculated. in, This represents the maximum concentration of pollutants. The screening values ​​for pollutants are determined based on the type of magnetizing agent. The Gibbs free energy change during magnetization by the magnetizing agent. Furthermore, based on data from the heavy metal magnetic conceptual model and the type of magnetizing agent, the optimal dosage ratio for the magnetizing agent to overcome the reaction energy barrier and to couple with the heavy metal pollutant needs to be determined.

[0036] S4: Generate a construction task package based on the dosage of the reagent, the magnetizing agent, and the magnetic concept model of heavy metals; select construction units; and assemble magnetic separation and purification equipment through the construction units. Furthermore, the objective of this stage is to generate a construction task package, select construction units, and assemble the magnetic separation purification equipment. Specifically, in step S4, the construction task package includes magnetic field strength, soil particle size, soil spreading thickness, reagent dosage, and operating mode; the construction unit includes a feed hopper, a crusher, and a magnetic separator, and the feed hopper, crusher, and magnetic separator are connected by a conveyor belt.

[0037] The specific implementation method for the above steps in this embodiment is as follows: Based on calculations using the reagent dosage, magnetizing agent, and heavy metal magnetic conceptual model, a construction task package is generated. This package needs to be distributed to the on-site construction department, where on-site engineers will break it down, organize it, and distribute it to each stage of the construction process to guide automated operations. The construction task package includes the magnetic field strength during magnetic separation, soil particle size, soil spreading thickness, reagent dosage, and operating mode. The operating modes include a default standard operating mode, a secondary cycle operating mode, and a gradient operating mode. Subsequently, a construction unit consisting of a feed hopper, crusher, and magnetic separator needs to be obtained. These components are sequentially connected via conveyor belts, thus forming the magnetic separation purification equipment.

[0038] S5: Collect soil samples contaminated with heavy metals, and according to the construction task package, use magnetic separation equipment to magnetize and separate the soil to complete the purification of the soil contaminated with heavy metals.

[0039] Furthermore, the objective of this stage is to purify the heavy metal-contaminated soil by magnetizing and separating it using magnetic separation equipment, according to the construction task package. Specifically, the heavy metal-contaminated soil from the affected site is first collected and fed into the feed hopper of the magnetic separation equipment. A predetermined dosage of magnetizing agent is injected into the feed hopper via pipeline and mixed with the heavy metal-contaminated soil. If magnetization is not required, no magnetizing agent is injected. The maximum suitable concentration of the agent can be adjusted based on its real-time dissolution. The mixed heavy metal-contaminated soil is then conveyed to a crusher via a conveyor belt. The crusher breaks the soil according to the particle size specified in the construction task package and, based on the desired soil thickness, feeds the heavy metal-contaminated soil into the magnetic separator via the conveyor belt.

[0040] The magnetic separator uses the magnetic field strength specified in the construction task package to separate heavy metal contaminated soil, removing the heavy metal pollutants before sending it out. This process continues until all heavy metal contaminated soil is purified, thus completing the purification of the heavy metal contaminated soil. The magnetic separation purification equipment operates according to the work mode specified in the construction task package. During the purification process, a rapid heavy metal detection instrument is installed at the outlet of the magnetic separator. Various components of the magnetic separation purification equipment can also continuously monitor construction parameters such as heavy metal content, maximum soil particle size, material spreading thickness, and material conveying rate per unit time. This data is sent to a control platform for monitoring the operational status and the matching of the work plan, allowing for real-time adjustments to the construction process.

[0041] The present invention provides a magnetic separation construction device for heavy metal contaminated soil. The magnetic separation construction device for heavy metal contaminated soil described below and the magnetic separation construction method for heavy metal contaminated soil described above can be referred to in correspondence.

[0042] Figure 2 An example is a schematic diagram of a magnetic separation construction system for heavy metal contaminated soil, as shown below. Figure 2 As shown, a magnetic separation construction method for heavy metal contaminated soil as described above includes: Data acquisition module 100: used to identify contaminated sites, measure pollutant data of contaminated sites, and establish a magnetic conceptual model of heavy metals based on pollutant data; Site selection module 200: Used to calculate the comprehensive magnetism of contaminated sites based on the heavy metal magnetic concept model, and select sites to be magnetized based on the comprehensive magnetism; Parameter calculation module 300: used to calculate the total magnetic content of the land parcel to be magnetized, select magnetizing agents based on the total magnetic content, and calculate the dosage of the magnetizing agents. Construction Task Package Module 400: Used to generate construction task packages based on reagent dosage, magnetizing agent and heavy metal magnetic concept model, select construction units, and assemble magnetic separation purification equipment through construction units; Soil magnetic separation module 500: Used to collect heavy metal contaminated soil, and according to the construction task package, use magnetic separation purification equipment to magnetize and separate the heavy metal contaminated soil to complete the purification of heavy metal contaminated soil.

[0043] Figure 3 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 3As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other via the communication bus 840. The processor 810 can call a computer program in the memory 830 to execute a magnetic separation construction method for heavy metal contaminated soil, the method including: S1: Identify contaminated sites, measure pollutant data from the contaminated sites, and establish a magnetic conceptual model of heavy metals based on the pollutant data; S2: Calculate the comprehensive magnetism of the contaminated site based on the heavy metal magnetism conceptual model, and select the site to be magnetized based on the comprehensive magnetism; S3: Calculate the total magnetic content of the plot to be magnetized, select magnetizing agents based on the total magnetic content, and calculate the dosage of the magnetizing agents. S4: Generate a construction task package based on the dosage of the reagent, the magnetizing agent, and the magnetic concept model of heavy metals; select construction units; and assemble magnetic separation and purification equipment through the construction units. S5: Collect soil samples contaminated with heavy metals, and according to the construction task package, use magnetic separation equipment to magnetize and separate the soil to complete the purification of the soil contaminated with heavy metals.

[0044] Furthermore, when the computer program in the aforementioned memory 830 can be implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0045] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein when the program instructions are executed by a computer, the computer is able to execute a magnetic separation construction method for heavy metal contaminated soil provided by the above methods, the method comprising: S1: Identify contaminated sites, measure pollutant data from the contaminated sites, and establish a magnetic conceptual model of heavy metals based on the pollutant data; S2: Calculate the comprehensive magnetism of the contaminated site based on the heavy metal magnetism conceptual model, and select the site to be magnetized based on the comprehensive magnetism; S3: Calculate the total magnetic content of the plot to be magnetized, select magnetizing agents based on the total magnetic content, and calculate the dosage of the magnetizing agents. S4: Generate a construction task package based on the dosage of the reagent, the magnetizing agent, and the magnetic concept model of heavy metals; select construction units; and assemble magnetic separation and purification equipment through the construction units. S5: Collect soil samples contaminated with heavy metals, and according to the construction task package, use magnetic separation equipment to magnetize and separate the soil to complete the purification of the soil contaminated with heavy metals.

[0046] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform one of the magnetic separation construction methods for heavy metal contaminated soil provided above, the method comprising: S1: Identify contaminated sites, measure pollutant data from the contaminated sites, and establish a magnetic conceptual model of heavy metals based on the pollutant data; S2: Calculate the comprehensive magnetism of the contaminated site based on the heavy metal magnetism conceptual model, and select the site to be magnetized based on the comprehensive magnetism; S3: Calculate the total magnetic content of the plot to be magnetized, select magnetizing agents based on the total magnetic content, and calculate the dosage of the magnetizing agents. S4: Generate a construction task package based on the dosage of the reagent, the magnetizing agent, and the magnetic concept model of heavy metals; select construction units; and assemble magnetic separation and purification equipment through the construction units. S5: Collect soil samples contaminated with heavy metals, and according to the construction task package, use magnetic separation equipment to magnetize and separate the soil to complete the purification of the soil contaminated with heavy metals.

[0047] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0048] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for magnetic separation construction against heavy metal contaminated soil, characterized by, The method comprises the following steps: S1: determining a contaminated land, measuring contaminant data of the contaminated land, and establishing a heavy metal magnetic conceptual model based on the contaminant data; S2: calculating comprehensive magnetism of the contaminated land according to the heavy metal magnetic conceptual model, and selecting a land to be magnetized according to the comprehensive magnetism; S3: calculating a total magnetic amount evaluation of the land to be magnetized, selecting a magnetizing agent according to the total magnetic amount evaluation, and calculating a dose of the magnetizing agent; S4: generating a construction task package according to the dose of the magnetizing agent, the magnetizing agent and the heavy metal magnetic conceptual model, selecting a construction unit, and forming a magnetic separation and purification device through the construction unit; S5: collecting heavy metal contaminated soil, magnetizing and magnetically separating the heavy metal contaminated soil according to the construction task package and using the magnetic separation and purification device, and completing purification of the heavy metal contaminated soil.

2. A method of magnetic separation of heavy metal contaminated soil according to claim 1, characterized in that, In step S1, the heavy metal magnetic conceptual model comprises target contaminant heavy metal occurrence form and target contaminant magnetic parameters.

3. The method of claim 1, wherein the method is characterized by, In step S2, the calculation method of the comprehensive magnetism P is: wherein, is the average concentration of the target pollutant, is the concentration of the target pollutant in the magnetic valence state, is the base magnetism of the target pollutant, is the base magnetism weighting factor, is the variable magnetic magnetism of the target pollutant, is the variable magnetic weighting factor.

4. The method of claim 1, wherein the method is characterized by, In step S3, the calculation method of the total magnetic amount evaluation S is: wherein, is the volume of contaminated soil, is the soil bulk density, K is the coupling difficulty weight coefficient of the magnetic agent.

5. The method of claim 1, wherein the method is characterized by, In step S3, the calculation method of the dose W of the magnetizing agent is: wherein, is the maximum concentration of the pollutant, is the pollution factor screening value, is the Gibbs free energy change.

6. A method of magnetic separation of heavy metal contaminated soil according to claim 1, wherein, In step S4, the construction task package comprises magnetic field strength, soil particle size, soil paving thickness, dose of the magnetizing agent and operation mode; the construction unit comprises a feeding hopper, a crusher and a magnetic separator, and the feeding hopper, the crusher and the magnetic separator are connected through a conveying belt.

7. A magnetic separation construction system for heavy metal contaminated soil for performing a magnetic separation construction method for heavy metal contaminated soil according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: A data acquisition module is configured to determine a contaminated land, measure contaminant data of the contaminated land, and establish a heavy metal magnetic conceptual model based on the contaminant data; A land selection module is configured to calculate comprehensive magnetism of the contaminated land according to the heavy metal magnetic conceptual model, and select a land to be magnetized according to the comprehensive magnetism; A parameter calculation module is configured to calculate a total magnetic amount evaluation of the land to be magnetized, select a magnetizing agent according to the total magnetic amount, and calculate a dose of the magnetizing agent; A construction task package module is configured to generate a construction task package according to the dose of the magnetizing agent, the magnetizing agent and the heavy metal magnetic conceptual model, select a construction unit, and form a magnetic separation and purification device through the construction unit; A soil magnetic separation module is configured to collect heavy metal contaminated soil, magnetize and magnetically separate the heavy metal contaminated soil according to the construction task package and using the magnetic separation and purification device, and complete purification of the heavy metal contaminated soil.

8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the magnetic separation construction method for heavy metal contaminated soil according to any one of claims 1 to 6. 9.A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the magnetic separation construction method for heavy metal contaminated soil according to any one of claims 1 to 6.

10. A computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, characterized in that, When the program instructions are executed by the computer, the computer can perform the steps of the magnetic separation construction method for heavy metal contaminated soil according to any one of claims 1 to 6.

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